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Carsten Kvist
2026-04-10 15:06:59 +02:00
parent 3031b7153b
commit e5a4711004
7806 changed files with 1918528 additions and 335 deletions
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161
linedance-app/LineDancePlayer.spec Normal file
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# -*- mode: python ; coding: utf-8 -*-
#
# LineDancePlayer.spec
#
# Byg med: pyinstaller LineDancePlayer.spec
# Output: dist\LineDancePlayer.exe
#
# Kræver: VLC installeret på byggemaskinen
# (typisk C:\Program Files\VideoLAN\VLC)
import os
import sys
from pathlib import Path
# ── Find VLC-installation ─────────────────────────────────────────────────────
def find_vlc_path() -> Path | None:
"""Find VLC på Windows — tjekker de mest almindelige installationsstier."""
candidates = [
Path(os.environ.get("PROGRAMFILES", "C:/Program Files")) / "VideoLAN" / "VLC",
Path(os.environ.get("PROGRAMFILES(X86)", "C:/Program Files (x86)")) / "VideoLAN" / "VLC",
Path("C:/Program Files/VideoLAN/VLC"),
Path("C:/Program Files (x86)/VideoLAN/VLC"),
]
# Tjek også PYTHONPATH og registry via python-vlc
try:
import vlc
vlc_path = Path(vlc.plugin_path).parent if vlc.plugin_path else None
if vlc_path and vlc_path.exists():
candidates.insert(0, vlc_path)
except Exception:
pass
for path in candidates:
if path.exists() and (path / "libvlc.dll").exists():
return path
return None
VLC_PATH = find_vlc_path()
if VLC_PATH is None:
print("=" * 60)
print("ADVARSEL: VLC ikke fundet!")
print("Installer VLC fra https://www.videolan.org/vlc/")
print("og kør pyinstaller igen.")
print("=" * 60)
VLC_PATH = Path("C:/Program Files/VideoLAN/VLC") # fallback
print(f"VLC fundet: {VLC_PATH}")
# ── Saml VLC binære filer ─────────────────────────────────────────────────────
vlc_binaries = []
vlc_datas = []
if VLC_PATH.exists():
# Hoved-DLL filer
for dll in ["libvlc.dll", "libvlccore.dll", "libvlc.lib"]:
dll_path = VLC_PATH / dll
if dll_path.exists():
vlc_binaries.append((str(dll_path), "."))
# Plugins-mappe — indeholder codecs, demuxers osv.
plugins_dir = VLC_PATH / "plugins"
if plugins_dir.exists():
vlc_datas.append((str(plugins_dir), "plugins"))
# Locale-filer
locale_dir = VLC_PATH / "locale"
if locale_dir.exists():
vlc_datas.append((str(locale_dir), "locale"))
# ── PyInstaller konfiguration ─────────────────────────────────────────────────
block_cipher = None
a = Analysis(
["main.py"],
pathex=["."],
binaries=vlc_binaries,
datas=[
("ui", "ui"),
("local", "local"),
("player", "player"),
] + vlc_datas,
hiddenimports=[
# PyQt6
"PyQt6.sip",
"PyQt6.QtCore",
"PyQt6.QtGui",
"PyQt6.QtWidgets",
# Lyd og tags
"vlc",
"mutagen",
"mutagen.mp3",
"mutagen.id3",
"mutagen.flac",
"mutagen.mp4",
"mutagen.oggvorbis",
"mutagen.oggopus",
# Fil-overvågning
"watchdog",
"watchdog.observers",
"watchdog.observers.polling",
"watchdog.events",
# Database
"sqlite3",
# Standard
"json",
"pathlib",
"threading",
"urllib.request",
"urllib.parse",
],
hookspath=[],
hooksconfig={},
runtime_hooks=[],
excludes=[
# Ting vi ikke bruger — reducerer filstørrelse
"tkinter",
"matplotlib",
"numpy",
"pandas",
"scipy",
"PIL",
"cv2",
"pytest",
],
win_no_prefer_redirects=False,
win_private_assemblies=False,
cipher=block_cipher,
noarchive=False,
)
pyz = PYZ(a.pure, a.zipped_data, cipher=block_cipher)
exe = EXE(
pyz,
a.scripts,
a.binaries,
a.zipfiles,
a.datas,
[],
name="LineDancePlayer",
debug=False,
bootloader_ignore_signals=False,
strip=False,
upx=True, # komprimer med UPX hvis tilgængeligt
upx_exclude=[
"libvlc.dll", # VLC må ikke komprimeres — den loader plugins dynamisk
"libvlccore.dll",
],
runtime_tmpdir=None,
console=False, # ingen konsol-vindue
disable_windowed_traceback=False,
target_arch=None,
codesign_identity=None,
entitlements_file=None,
# Ikon — kommenter ud hvis du ikke har en .ico fil endnu
# icon="assets/icon.ico",
)

68
linedance-app/build.bat Normal file
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@echo off
echo ================================================
echo LineDance Player - Byg EXE
echo ================================================
echo.
REM Tjek at vi er i det rigtige bibliotek
if not exist main.py (
echo FEJL: Kør build.bat fra LinedanceAfspiller\linedance-app mappen
pause
exit /b 1
)
REM Aktiver venv
if not exist venv\Scripts\activate.bat (
echo Opretter virtuelt miljø...
python -m venv venv
)
call venv\Scripts\activate.bat
REM Installer/opdater pakker
echo Installerer pakker...
pip install -r requirements.txt --quiet
pip install pyinstaller --quiet
REM Tjek VLC
if not exist "C:\Program Files\VideoLAN\VLC\libvlc.dll" (
if not exist "C:\Program Files (x86)\VideoLAN\VLC\libvlc.dll" (
echo.
echo ADVARSEL: VLC ser ikke ud til at vaere installeret!
echo Download VLC fra: https://www.videolan.org/vlc/
echo Vaelg 64-bit versionen.
echo.
pause
exit /b 1
)
)
REM Ryd gamle build-filer
echo Rydder gamle build-filer...
if exist build rmdir /s /q build
if exist dist rmdir /s /q dist
REM Byg EXE
echo.
echo Bygger LineDancePlayer.exe ...
echo (Dette tager typisk 1-3 minutter)
echo.
pyinstaller LineDancePlayer.spec
if %ERRORLEVEL% neq 0 (
echo.
echo FEJL under build! Se fejlbesked ovenfor.
pause
exit /b 1
)
echo.
echo ================================================
echo BUILD FAERDIG!
echo Filen ligger i: dist\LineDancePlayer.exe
echo ================================================
echo.
REM Vis filstoerrelse
for %%A in (dist\LineDancePlayer.exe) do echo Filstoerrelse: %%~zA bytes
pause

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3
linedance-app/local/local_db.py
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@@ -259,10 +259,11 @@ def upsert_song(song_data: dict) -> str:
song_id = existing["id"]
conn.execute("""
UPDATE songs SET
title=?, artist=?, album=?, bpm=?, duration_sec=?,
library_id=?, title=?, artist=?, album=?, bpm=?, duration_sec=?,
file_format=?, file_modified_at=?, file_missing=0, extra_tags=?
WHERE id=?
""", (
song_data.get("library_id"),
song_data.get("title", ""),
song_data.get("artist", ""),
song_data.get("album", ""),

43
linedance-app/local/tag_reader.py
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@@ -346,3 +346,46 @@ def read_dances_from_file(path: str | Path) -> list[str]:
"""Læser kun danse fra en fil — hurtigere end fuld read_tags()."""
tags = read_tags(path)
return tags.get("dances", [])
# ── BPM-analyse ───────────────────────────────────────────────────────────────
def analyze_bpm(path: str | Path) -> float | None:
"""
Analysér BPM fra lydfilen ved hjælp af librosa.
Returnerer BPM som float eller None ved fejl.
Tager 2-5 sekunder per sang — kør i baggrundstråd.
"""
try:
import librosa
# Indlæs kun de første 60 sekunder for hastighed
y, sr = librosa.load(str(path), duration=60.0, mono=True)
tempo, _ = librosa.beat.beat_track(y=y, sr=sr)
# librosa returnerer array i nyere versioner
if hasattr(tempo, "__len__"):
bpm = float(tempo[0]) if len(tempo) > 0 else 0.0
else:
bpm = float(tempo)
return round(bpm, 1) if bpm > 0 else None
except ImportError:
print("librosa ikke installeret — installer med: pip install librosa")
return None
except Exception as e:
print(f"BPM-analyse fejl for {path}: {e}")
return None
def analyze_and_save_bpm(path: str | Path, song_id: str) -> float | None:
"""Analysér BPM og gem i SQLite. Returnerer målt BPM."""
bpm = analyze_bpm(path)
if bpm and bpm > 0:
try:
from local.local_db import get_db
with get_db() as conn:
conn.execute(
"UPDATE songs SET bpm=? WHERE id=? AND (bpm IS NULL OR bpm=0)",
(int(round(bpm)), song_id)
)
except Exception as e:
print(f"BPM gem fejl: {e}")
return bpm

3
linedance-app/requirements.txt
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@@ -2,3 +2,6 @@ PyQt6>=6.6.0
python-vlc>=3.0.18
mutagen>=1.47.0
watchdog>=4.0.0
# BPM-analyse
librosa>=0.10.0

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linedance-app/ui/__pycache__/main_window.cpython-312.pyc
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linedance-app/ui/__pycache__/themes.cpython-312.pyc
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18
linedance-app/ui/library_manager.py
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@@ -49,6 +49,11 @@ class LibraryManagerDialog(QDialog):
btn_remove.clicked.connect(self._remove_selected)
btn_row.addWidget(btn_remove)
btn_scan = QPushButton("⟳ Scan alle")
btn_scan.setToolTip("Scan alle mapper for nye og ændrede filer")
btn_scan.clicked.connect(self._scan_all)
btn_row.addWidget(btn_scan)
btn_row.addStretch()
btn_close = QPushButton("Luk")
btn_close.clicked.connect(self.accept)
@@ -83,6 +88,15 @@ class LibraryManagerDialog(QDialog):
except Exception as e:
print(f"Library manager load fejl: {e}")
def _scan_all(self):
mw = self.parent()
if hasattr(mw, "start_scan"):
mw.start_scan()
self._set_status("Scanning startet...")
def _set_status(self, text: str):
pass # kan udvides med statuslinje i dialogen
def _add_folder(self):
from PyQt6.QtWidgets import QFileDialog
folder = QFileDialog.getExistingDirectory(self, "Vælg musikmappe")
@@ -90,7 +104,9 @@ class LibraryManagerDialog(QDialog):
mw = self.parent()
if hasattr(mw, "add_library_path"):
mw.add_library_path(folder)
self._load()
# Genindlæs listen efter kort pause så DB er opdateret
from PyQt6.QtCore import QTimer
QTimer.singleShot(600, self._load)
def _remove_selected(self):
item = self._list.currentItem()

48
linedance-app/ui/library_panel.py
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@@ -70,22 +70,11 @@ class LibraryPanel(QWidget):
header.addWidget(lbl)
header.addStretch()
self._btn_scan = QPushButton("⟳ SCAN")
self._btn_scan.setFixedHeight(24)
self._btn_scan.setToolTip("Scan alle biblioteksmapper for nye og ændrede filer")
self._btn_scan.clicked.connect(self._on_scan_clicked)
header.addWidget(self._btn_scan)
btn_manage = QPushButton("⚙ Mapper")
btn_manage.setFixedHeight(24)
btn_manage.setToolTip("Tilføj eller fjern musikbiblioteker")
btn_manage.setToolTip("Tilføj, fjern og scan musikbiblioteker")
btn_manage.clicked.connect(self._manage_libraries)
header.addWidget(btn_manage)
btn_add = QPushButton("+ MAPPE")
btn_add.setFixedHeight(24)
btn_add.clicked.connect(self._add_folder)
header.addWidget(btn_add)
layout.addLayout(header)
# Scan status
@@ -136,14 +125,10 @@ class LibraryPanel(QWidget):
def set_scanning(self, scanning: bool, status_text: str = ""):
if scanning:
self._btn_scan.setEnabled(False)
self._btn_scan.setText("⟳ SCANNER...")
self._scan_bar.show()
self._scan_label.setText(status_text or "Starter...")
self._scan_label.show()
else:
self._btn_scan.setEnabled(True)
self._btn_scan.setText("⟳ SCAN")
self._scan_bar.hide()
self._scan_label.hide()
@@ -216,6 +201,7 @@ class LibraryPanel(QWidget):
act_play = menu.addAction("Afspil")
menu.addSeparator()
act_tags = menu.addAction("✎ Rediger dans-tags...")
act_bpm = menu.addAction("♩ Analysér BPM")
menu.addSeparator()
send_menu = menu.addMenu("Send til")
act_mail = send_menu.addAction("✉ Send som mail")
@@ -226,9 +212,39 @@ class LibraryPanel(QWidget):
self.song_selected.emit(song)
elif action == act_tags:
self.edit_tags_requested.emit(song)
elif action == act_bpm:
self._analyze_bpm(song)
elif action == act_mail:
self.send_mail_requested.emit(song)
def _analyze_bpm(self, song: dict):
"""Analysér BPM i baggrundstråd og opdater biblioteket."""
path = song.get("local_path", "")
song_id = song.get("id", "")
if not path or not song_id:
return
from PyQt6.QtCore import QThread, pyqtSignal as _sig
class BpmWorker(QThread):
done = _sig(float)
def __init__(self, p, sid):
super().__init__()
self._p, self._sid = p, sid
def run(self):
from local.tag_reader import analyze_and_save_bpm
bpm = analyze_and_save_bpm(self._p, self._sid)
if bpm:
self.done.emit(bpm)
self._bpm_worker = BpmWorker(path, song_id)
self._bpm_worker.done.connect(
lambda bpm: (
self._do_search(),
print(f"BPM analyseret: {bpm}")
)
)
self._bpm_worker.start()
def _manage_libraries(self):
from ui.library_manager import LibraryManagerDialog
dialog = LibraryManagerDialog(parent=self.window())

104
linedance-app/ui/main_window.py
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@@ -115,38 +115,25 @@ class MainWindow(QMainWindow):
def _build_menu(self):
menubar = self.menuBar()
# Filer
# ── Filer ─────────────────────────────────────────────────────────────
file_menu = menubar.addMenu("Filer")
file_menu.addSeparator()
self._act_go_online = QAction("Gå online...", self)
self._act_go_online.setShortcut("Ctrl+L")
self._act_go_online.setToolTip("Log ind og synkroniser med server")
self._act_go_online.triggered.connect(self._go_online)
file_menu.addAction(self._act_go_online)
self._act_go_offline = QAction("Gå offline", self)
self._act_go_offline.setToolTip("Log ud og arbejd lokalt")
self._act_go_offline.triggered.connect(self._go_offline)
self._act_go_offline.setEnabled(False) # kun aktiv når man er online
self._act_go_offline.setEnabled(False)
file_menu.addAction(self._act_go_offline)
file_menu.addSeparator()
act_add_folder = QAction("Tilføj musikmappe...", self)
act_add_folder.setShortcut("Ctrl+O")
act_add_folder.triggered.connect(self._menu_add_folder)
file_menu.addAction(act_add_folder)
file_menu.addSeparator()
act_scan = QAction("Scan biblioteker", self)
act_scan.setShortcut("Ctrl+R")
act_scan.setToolTip("Gennemgå alle biblioteksmapper for nye og ændrede filer")
act_scan.triggered.connect(self.start_scan)
file_menu.addAction(act_scan)
self._act_scan = act_scan
act_settings = QAction("Indstillinger...", self)
act_settings.setShortcut("Ctrl+,")
act_settings.triggered.connect(self._open_settings)
file_menu.addAction(act_settings)
file_menu.addSeparator()
@@ -155,33 +142,14 @@ class MainWindow(QMainWindow):
act_quit.triggered.connect(self.close)
file_menu.addAction(act_quit)
# Danseliste
pl_menu = menubar.addMenu("Danseliste")
# ── Ingen Danseliste- eller Visning-menu ──────────────────────────────
# Ny/Gem/Hent ligger direkte i danseliste-panelet
# Tema-skift ligger i topbar-knappen
# Mapper og scan ligger i ⚙ Mapper dialogen
act_new_pl = QAction("Ny tom liste", self)
act_new_pl.setShortcut("Ctrl+N")
act_new_pl.triggered.connect(self._new_playlist)
pl_menu.addAction(act_new_pl)
act_manage = QAction("Gem / Indlæs / Importer...", self)
act_manage.setShortcut("Ctrl+M")
act_manage.triggered.connect(self._open_playlist_manager)
pl_menu.addAction(act_manage)
# Visning
view_menu = menubar.addMenu("Visning")
act_theme = QAction("Skift tema (lyst/mørkt)", self)
act_theme.setShortcut("Ctrl+T")
act_theme.triggered.connect(self._toggle_theme)
view_menu.addAction(act_theme)
view_menu.addSeparator()
act_settings = QAction("Indstillinger...", self)
act_settings.setShortcut("Ctrl+,")
act_settings.triggered.connect(self._open_settings)
view_menu.addAction(act_settings)
# Gem reference til scan-action (bruges stadig internt)
self._act_scan = QAction("Scan", self)
self._act_scan.triggered.connect(self.start_scan)
# ── Statuslinje ───────────────────────────────────────────────────────────
@@ -399,8 +367,10 @@ class MainWindow(QMainWindow):
init_db()
# Brug et Qt signal til thread-safe reload fra watcher-tråden
from PyQt6.QtCore import QMetaObject, Q_ARG
def on_file_change(event_type, path, song_id):
QTimer.singleShot(500, self._reload_library)
QTimer.singleShot(0, self._reload_library)
self._watcher = get_watcher(on_change=on_file_change)
self._watcher.start()
@@ -494,10 +464,16 @@ class MainWindow(QMainWindow):
def add_library_path(self, path: str):
try:
if not self._watcher:
self._set_status("Watcher ikke klar endnu — prøv igen om et øjeblik", 3000)
return
self._watcher.add_library(path)
self._set_status(f"Tilføjet: {path} — scanner...")
# Genindlæs bibliotekslisten og start scan
QTimer.singleShot(500, self._reload_library)
QTimer.singleShot(1000, self.start_scan)
except Exception as e:
self._set_status(f"Fejl: {e}")
self._set_status(f"Fejl ved tilføjelse: {e}")
def _open_settings(self):
dialog = SettingsDialog(parent=self)
@@ -860,10 +836,15 @@ class MainWindow(QMainWindow):
self._vu.reset()
# Markér den afspillede sang
self._playlist_panel.mark_played(self._current_idx)
prev_idx = self._current_idx
self._playlist_panel.mark_played(prev_idx)
# Find næste afspilbare sang — spring skippede og afspillede over
ni = self._playlist_panel.next_playable_idx(self._current_idx + 1)
# Synkroniser event-status til den gemte navngivne liste
self._sync_event_status_to_playlist()
# Find næste afspilbare sang — fra 0 hvis ingen sang var i gang
search_from = max(0, prev_idx + 1)
ni = self._playlist_panel.next_playable_idx(search_from)
next_song = self._playlist_panel.get_song(ni) if ni is not None else None
if next_song:
self._current_idx = ni
@@ -876,6 +857,29 @@ class MainWindow(QMainWindow):
self._lbl_dances.setText("")
self._set_status("Danselisten er afsluttet")
def _sync_event_status_to_playlist(self):
"""Gem event-fremgang i den aktive navngivne liste."""
try:
from local.local_db import get_db
songs = self._playlist_panel.get_songs()
statuses = self._playlist_panel.get_statuses()
with get_db() as conn:
# Find den aktive liste (ikke __aktiv__)
pl = conn.execute(
"SELECT id FROM playlists WHERE name != '__aktiv__' "
"ORDER BY created_at DESC LIMIT 1"
).fetchone()
if not pl:
return
# Opdater status for hver sang i listen
for i, (song, status) in enumerate(zip(songs, statuses)):
conn.execute("""
UPDATE playlist_songs SET status=?
WHERE playlist_id=? AND song_id=?
""", (status, pl["id"], song.get("id")))
except Exception as e:
print(f"Event-status sync fejl: {e}")
def _on_state_changed(self, state: str):
if state == "playing":
self._btn_play.setText("⏸")

49
linedance-app/ui/themes.py
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@@ -216,6 +216,28 @@ QScrollBar::handle:vertical {
}
QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical { height: 0; }
/* Højreklik-menu */
QMenu {
background-color: #22252a;
color: #e8eaf0;
border: 1px solid #4a5060;
padding: 4px 0;
font-size: 14px;
}
QMenu::item {
padding: 8px 24px;
border-radius: 0;
}
QMenu::item:selected {
background-color: #e8a020;
color: #111214;
}
QMenu::separator {
height: 1px;
background: #3a3e46;
margin: 4px 8px;
}
/* Topbar */
QFrame#topbar {
background-color: #1a1c1f;
@@ -247,7 +269,7 @@ QMainWindow, #root {
}
QPushButton {
background-color: #b0b4bc;
color: #4a5060;
color: #1a1c22;
border-color: #8890a0;
}
QPushButton:hover {
@@ -262,10 +284,19 @@ QPushButton#btn_play {
}
QListWidget {
background-color: #d8dae0;
color: #1a1c22;
}
QListWidget::item {
color: #1a1c22;
}
QListWidget::item:selected {
background-color: #eef0f4;
border-left: 2px solid #c07010;
background-color: #c07010;
color: #ffffff;
border-left: 2px solid #a05808;
}
QListWidget::item:hover {
background-color: #c8ccd4;
color: #1a1c22;
}
QLineEdit {
background-color: #c8cad0;
@@ -280,12 +311,22 @@ QFrame#transport_frame, QFrame#progress_frame {
}
QFrame#track_display { background-color: #c8cad0; border-color: #aab0bc; }
QFrame#topbar { background-color: #d8dae0; border-color: #aab0bc; }
QLabel#section_title { background-color: #e4e6ec; color: #8890a0; border-color: #aab0bc; }
QLabel#section_title { background-color: #e4e6ec; color: #1a1c22; border-color: #aab0bc; }
QLabel#track_title { color: #1a1c22; }
QLabel#track_meta { color: #4a5060; }
QLabel#result_count { color: #5a6070; }
QSlider::groove:horizontal { background: #b0b4bc; }
QScrollBar:vertical { background: #d8dae0; }
QScrollBar::handle:vertical { background: #8890a0; }
QMenu {
background-color: #e4e6ec;
color: #1a1c22;
border: 1px solid #aab0bc;
}
QMenu::item:selected {
background-color: #c07010;
color: #ffffff;
}
"""

8
linedance-app/venv/bin/f2py Executable file
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@@ -0,0 +1,8 @@
#!/home/carsten/Dokumenter/GitClone/LinedanceAfspiller/linedance-app/venv/bin/python3.12
# -*- coding: utf-8 -*-
import re
import sys
from numpy.f2py.f2py2e import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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#!/home/carsten/Dokumenter/GitClone/LinedanceAfspiller/linedance-app/venv/bin/python3.12
# -*- coding: utf-8 -*-
import re
import sys
from charset_normalizer.cli import cli_detect
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
sys.exit(cli_detect())

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#!/home/carsten/Dokumenter/GitClone/LinedanceAfspiller/linedance-app/venv/bin/python3.12
# -*- coding: UTF-8 -*-
from __future__ import print_function, division, absolute_import
from numba.misc.numba_entry import main
if __name__ == "__main__":
main()

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#!/home/carsten/Dokumenter/GitClone/LinedanceAfspiller/linedance-app/venv/bin/python3.12
# -*- coding: utf-8 -*-
import re
import sys
from numpy._configtool import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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# auto-generated file
import _cffi_backend
ffi = _cffi_backend.FFI('_soundfile',
_version = 0x2601,
_types = b'\x00\x00\x12\x0D\x00\x00\x68\x03\x00\x00\x07\x01\x00\x00\x67\x03\x00\x00\x75\x03\x00\x00\x00\x0F\x00\x00\x12\x0D\x00\x00\x6A\x03\x00\x00\x07\x01\x00\x00\x03\x11\x00\x00\x00\x0F\x00\x00\x12\x0D\x00\x00\x07\x01\x00\x00\x07\x01\x00\x00\x03\x11\x00\x00\x07\x01\x00\x00\x00\x0F\x00\x00\x07\x0D\x00\x00\x69\x03\x00\x00\x00\x0F\x00\x00\x07\x0D\x00\x00\x12\x11\x00\x00\x07\x01\x00\x00\x00\x0F\x00\x00\x07\x0D\x00\x00\x07\x01\x00\x00\x00\x0F\x00\x00\x07\x0D\x00\x00\x00\x0F\x00\x00\x02\x0D\x00\x00\x67\x03\x00\x00\x00\x0F\x00\x00\x02\x0D\x00\x00\x12\x11\x00\x00\x00\x0F\x00\x00\x02\x0D\x00\x00\x12\x11\x00\x00\x6A\x03\x00\x00\x1C\x01\x00\x00\x00\x0F\x00\x00\x02\x0D\x00\x00\x12\x11\x00\x00\x07\x01\x00\x00\x07\x11\x00\x00\x00\x0F\x00\x00\x02\x0D\x00\x00\x12\x11\x00\x00\x07\x01\x00\x00\x04\x11\x00\x00\x07\x01\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x12\x11\x00\x00\x6B\x03\x00\x00\x17\x01\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x12\x11\x00\x00\x6F\x03\x00\x00\x17\x01\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x12\x11\x00\x00\x02\x03\x00\x00\x17\x01\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x12\x11\x00\x00\x17\x01\x00\x00\x07\x01\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x12\x11\x00\x00\x74\x03\x00\x00\x17\x01\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x12\x11\x00\x00\x04\x11\x00\x00\x17\x01\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x17\x01\x00\x00\x07\x01\x00\x00\x04\x11\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x04\x11\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x04\x11\x00\x00\x17\x01\x00\x00\x04\x11\x00\x00\x00\x0F\x00\x00\x36\x0D\x00\x00\x75\x03\x00\x00\x17\x01\x00\x00\x04\x11\x00\x00\x00\x0F\x00\x00\x75\x0D\x00\x00\x12\x11\x00\x00\x00\x0F\x00\x00\x00\x09\x00\x00\x01\x09\x00\x00\x02\x09\x00\x00\x03\x09\x00\x00\x02\x01\x00\x00\x0E\x01\x00\x00\x00\x0B\x00\x00\x01\x0B\x00\x00\x02\x0B\x00\x00\x0D\x01\x00\x00\x51\x03\x00\x00\x56\x03\x00\x00\x59\x03\x00\x00\x5E\x03\x00\x00\x05\x01\x00\x00\x00\x01',
_globals = (b'\xFF\xFF\xFF\x0BSFC_FILE_TRUNCATE',4224,b'\xFF\xFF\xFF\x0BSFC_GET_FORMAT_INFO',4136,b'\xFF\xFF\xFF\x0BSFC_GET_FORMAT_MAJOR',4145,b'\xFF\xFF\xFF\x0BSFC_GET_FORMAT_MAJOR_COUNT',4144,b'\xFF\xFF\xFF\x0BSFC_GET_FORMAT_SUBTYPE',4147,b'\xFF\xFF\xFF\x0BSFC_GET_FORMAT_SUBTYPE_COUNT',4146,b'\xFF\xFF\xFF\x0BSFC_GET_LIB_VERSION',4096,b'\xFF\xFF\xFF\x0BSFC_GET_LOG_INFO',4097,b'\xFF\xFF\xFF\x0BSFC_SET_BITRATE_MODE',4869,b'\xFF\xFF\xFF\x0BSFC_SET_CLIPPING',4288,b'\xFF\xFF\xFF\x0BSFC_SET_COMPRESSION_LEVEL',4865,b'\xFF\xFF\xFF\x0BSFC_SET_SCALE_FLOAT_INT_READ',4116,b'\xFF\xFF\xFF\x0BSFC_SET_SCALE_INT_FLOAT_WRITE',4117,b'\xFF\xFF\xFF\x0BSFM_RDWR',48,b'\xFF\xFF\xFF\x0BSFM_READ',16,b'\xFF\xFF\xFF\x0BSFM_WRITE',32,b'\xFF\xFF\xFF\x0BSF_BITRATE_MODE_AVERAGE',1,b'\xFF\xFF\xFF\x0BSF_BITRATE_MODE_CONSTANT',0,b'\xFF\xFF\xFF\x0BSF_BITRATE_MODE_VARIABLE',2,b'\xFF\xFF\xFF\x0BSF_FALSE',0,b'\xFF\xFF\xFF\x0BSF_FORMAT_ENDMASK',805306368,b'\xFF\xFF\xFF\x0BSF_FORMAT_SUBMASK',65535,b'\xFF\xFF\xFF\x0BSF_FORMAT_TYPEMASK',268369920,b'\xFF\xFF\xFF\x0BSF_TRUE',1,b'\x00\x00\x20\x23sf_close',0,b'\x00\x00\x2D\x23sf_command',0,b'\x00\x00\x20\x23sf_error',0,b'\x00\x00\x18\x23sf_error_number',0,b'\x00\x00\x23\x23sf_error_str',0,b'\x00\x00\x1D\x23sf_format_check',0,b'\x00\x00\x14\x23sf_get_string',0,b'\x00\x00\x06\x23sf_open',0,b'\x00\x00\x0B\x23sf_open_fd',0,b'\x00\x00\x00\x23sf_open_virtual',0,b'\x00\x00\x20\x23sf_perror',0,b'\x00\x00\x33\x23sf_read_double',0,b'\x00\x00\x38\x23sf_read_float',0,b'\x00\x00\x3D\x23sf_read_int',0,b'\x00\x00\x4C\x23sf_read_raw',0,b'\x00\x00\x47\x23sf_read_short',0,b'\x00\x00\x4C\x23sf_readf_double',0,b'\x00\x00\x4C\x23sf_readf_float',0,b'\x00\x00\x4C\x23sf_readf_int',0,b'\x00\x00\x4C\x23sf_readf_short',0,b'\x00\x00\x42\x23sf_seek',0,b'\x00\x00\x28\x23sf_set_string',0,b'\x00\x00\x11\x23sf_strerror',0,b'\x00\x00\x1B\x23sf_version_string',0,b'\x00\x00\x33\x23sf_write_double',0,b'\x00\x00\x38\x23sf_write_float',0,b'\x00\x00\x3D\x23sf_write_int',0,b'\x00\x00\x4C\x23sf_write_raw',0,b'\x00\x00\x47\x23sf_write_short',0,b'\x00\x00\x63\x23sf_write_sync',0,b'\x00\x00\x4C\x23sf_writef_double',0,b'\x00\x00\x4C\x23sf_writef_float',0,b'\x00\x00\x4C\x23sf_writef_int',0,b'\x00\x00\x4C\x23sf_writef_short',0),
_struct_unions = ((b'\x00\x00\x00\x66\x00\x00\x00\x02SF_FORMAT_INFO',b'\x00\x00\x02\x11format',b'\x00\x00\x07\x11name',b'\x00\x00\x07\x11extension'),(b'\x00\x00\x00\x67\x00\x00\x00\x02SF_INFO',b'\x00\x00\x36\x11frames',b'\x00\x00\x02\x11samplerate',b'\x00\x00\x02\x11channels',b'\x00\x00\x02\x11format',b'\x00\x00\x02\x11sections',b'\x00\x00\x02\x11seekable'),(b'\x00\x00\x00\x68\x00\x00\x00\x02SF_VIRTUAL_IO',b'\x00\x00\x71\x11get_filelen',b'\x00\x00\x70\x11seek',b'\x00\x00\x72\x11read',b'\x00\x00\x73\x11write',b'\x00\x00\x71\x11tell'),(b'\x00\x00\x00\x69\x00\x00\x00\x10SNDFILE_tag',)),
_enums = (b'\x00\x00\x00\x6C\x00\x00\x00\x16$1\x00SF_FORMAT_SUBMASK,SF_FORMAT_TYPEMASK,SF_FORMAT_ENDMASK',b'\x00\x00\x00\x6D\x00\x00\x00\x16$2\x00SFC_GET_LIB_VERSION,SFC_GET_LOG_INFO,SFC_GET_FORMAT_INFO,SFC_GET_FORMAT_MAJOR_COUNT,SFC_GET_FORMAT_MAJOR,SFC_GET_FORMAT_SUBTYPE_COUNT,SFC_GET_FORMAT_SUBTYPE,SFC_FILE_TRUNCATE,SFC_SET_CLIPPING,SFC_SET_SCALE_FLOAT_INT_READ,SFC_SET_SCALE_INT_FLOAT_WRITE,SFC_SET_COMPRESSION_LEVEL,SFC_SET_BITRATE_MODE',b'\x00\x00\x00\x6E\x00\x00\x00\x16$3\x00SF_FALSE,SF_TRUE,SFM_READ,SFM_WRITE,SFM_RDWR,SF_BITRATE_MODE_CONSTANT,SF_BITRATE_MODE_AVERAGE,SF_BITRATE_MODE_VARIABLE'),
_typenames = (b'\x00\x00\x00\x66SF_FORMAT_INFO',b'\x00\x00\x00\x67SF_INFO',b'\x00\x00\x00\x68SF_VIRTUAL_IO',b'\x00\x00\x00\x69SNDFILE',b'\x00\x00\x00\x36sf_count_t',b'\x00\x00\x00\x71sf_vio_get_filelen',b'\x00\x00\x00\x72sf_vio_read',b'\x00\x00\x00\x70sf_vio_seek',b'\x00\x00\x00\x71sf_vio_tell',b'\x00\x00\x00\x73sf_vio_write'),
)

503
linedance-app/venv/lib/python3.12/site-packages/_soundfile_data/COPYING Normal file
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@@ -0,0 +1,503 @@
GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
[This is the first released version of the Lesser GPL. It also counts
as the successor of the GNU Library Public License, version 2, hence
the version number 2.1.]
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The licenses for most software are designed to take away your
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# this file makes _soundfile_data importable, so we can query its path
# when searching for the libsndfile binaries.
pass

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Metadata-Version: 2.4
Name: audioread
Version: 3.1.0
Summary: Multi-library, cross-platform audio decoding.
License-Expression: MIT
License-File: LICENSE
Author: Adrian Sampson
Author-email: adrian@radbox.org
Requires-Python: >=3.9
Classifier: Topic :: Multimedia :: Sound/Audio :: Conversion
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: License :: OSI Approved :: MIT License
Provides-Extra: gi
Provides-Extra: mad
Provides-Extra: test
Requires-Dist: pygobject (>=3.54.2,<4.0.0) ; extra == "gi"
Requires-Dist: pymad[mad] (>=0.11.3,<0.12.0) ; extra == "mad"
Requires-Dist: pytest (>=8.4.2) ; extra == "test"
Requires-Dist: pytest-cov (>=7.0.0) ; extra == "test"
Requires-Dist: standard-aifc ; python_version >= "3.13"
Requires-Dist: standard-sunau ; python_version >= "3.13"
Project-URL: Bug Tracker, https://github.com/beetbox/audioread/issues
Project-URL: Homepage, https://github.com/beetbox/audioread
Project-URL: Repository, https://github.com/beetbox/audioread
Description-Content-Type: text/x-rst
audioread
=========
Decode audio files using whichever backend is available. The library
currently supports:
- `Gstreamer`_ via `PyGObject`_.
- `Core Audio`_ on Mac OS X via `ctypes`_. (PyObjC not required.)
- `MAD`_ via the `pymad`_ bindings.
- `FFmpeg`_ or `Libav`_ via its command-line interface.
- The standard library `wave`_, `aifc`_, and `sunau`_ modules (for
uncompressed audio formats).
.. _Gstreamer: http://gstreamer.freedesktop.org/
.. _gst-python: http://gstreamer.freedesktop.org/modules/gst-python.html
.. _Core Audio: http://developer.apple.com/technologies/mac/audio-and-video.html
.. _ctypes: http://docs.python.org/library/ctypes.html
.. _MAD: http://www.underbit.com/products/mad/
.. _pymad: http://spacepants.org/src/pymad/
.. _FFmpeg: http://ffmpeg.org/
.. _Libav: https://www.libav.org/
.. _wave: http://docs.python.org/library/wave.html
.. _aifc: http://docs.python.org/library/aifc.html
.. _sunau: http://docs.python.org/library/sunau.html
.. _PyGObject: https://pygobject.readthedocs.io/
Use the library like so::
with audioread.audio_open(filename) as f:
print(f.channels, f.samplerate, f.duration)
for buf in f:
do_something(buf)
Buffers in the file can be accessed by iterating over the object returned from
``audio_open``. Each buffer is a bytes-like object (``buffer``, ``bytes``, or
``bytearray``) containing raw **16-bit little-endian signed integer PCM
data**. (Currently, these PCM format parameters are not configurable, but this
could be added to most of the backends.)
Additional values are available as fields on the audio file object:
- ``channels`` is the number of audio channels (an integer).
- ``samplerate`` is given in Hz (an integer).
- ``duration`` is the length of the audio in seconds (a float).
The ``audio_open`` function transparently selects a backend that can read the
file. (Each backend is implemented in a module inside the ``audioread``
package.) If no backends succeed in opening the file, a ``DecodeError``
exception is raised. This exception is only used when the file type is
unsupported by the backends; if the file doesn't exist, a standard ``IOError``
will be raised.
A second optional parameter to ``audio_open`` specifies which backends to try
(instead of trying them all, which is the default). You can use the
``available_backends`` function to get a list backends that are usable on the
current system.
Audioread supports Python 3 (3.9+).
Example
-------
The included ``decode.py`` script demonstrates using this package to
convert compressed audio files to WAV files.
Troubleshooting
---------------
A ``NoBackendError`` exception means that the library could not find one of
the libraries or tools it needs to decode audio. This could mean, for example,
that you have a broken installation of `FFmpeg`_. To check, try typing
``ffmpeg -version`` in your shell. If that gives you an error, try installing
FFmpeg with your OS's package manager (e.g., apt or yum) or `using Conda
<https://anaconda.org/conda-forge/ffmpeg>`_.
Version History
---------------
3.0.2
Support path-like objects (not just strings) in the Core Audio backend.
3.0.1
Fix a possible deadlock when FFmpeg's version output produces too much data.
3.0.0
Drop support for Python 2 and older versions of Python 3. The library now
requires Python 3.6+.
Increase default block size in FFmpegAudioFile to get slightly faster file reading.
Cache backends for faster lookup (thanks to @bmcfee).
Audio file classes now inherit from a common base ``AudioFile`` class.
2.1.9
Work correctly with GStreamer 1.18 and later (thanks to @ssssam).
2.1.8
Fix an unhandled ``OSError`` when FFmpeg is not installed.
2.1.7
Properly close some filehandles in the FFmpeg backend (thanks to
@RyanMarcus and @ssssam).
The maddec backend now always produces bytes objects, like the other
backends (thanks to @ssssam).
Resolve an audio data memory leak in the GStreamer backend (thanks again to
@ssssam).
You can now optionally specify which specific backends ``audio_open`` should
try (thanks once again to @ssssam).
On Windows, avoid opening a console window to run FFmpeg (thanks to @flokX).
2.1.6
Fix a "no such process" crash in the FFmpeg backend on Windows Subsystem for
Linux (thanks to @llamasoft).
Avoid suppressing SIGINT in the GStreamer backend on older versions of
PyGObject (thanks to @lazka).
2.1.5
Properly clean up the file handle when a backend fails to decode a file.
Fix parsing of "N.M" channel counts in the FFmpeg backend (thanks to @piem).
Avoid a crash in the raw backend when a file uses an unsupported number of
bits per sample (namely, 24-bit samples in Python < 3.4).
Add a ``__version__`` value to the package.
2.1.4
Fix a bug in the FFmpeg backend where, after closing a file, the program's
standard input stream would be "broken" and wouldn't receive any input.
2.1.3
Avoid some warnings in the GStreamer backend when using modern versions of
GLib. We now require at least GLib 2.32.
2.1.2
Fix a file descriptor leak when opening and closing many files using
GStreamer.
2.1.1
Just fix ReST formatting in the README.
2.1.0
The FFmpeg backend can now also use Libav's ``avconv`` command.
Fix a warning by requiring GStreamer >= 1.0.
Fix some Python 3 crashes with the new GStreamer backend (thanks to
@xix-xeaon).
2.0.0
The GStreamer backend now uses GStreamer 1.x via the new
gobject-introspection API (and is compatible with Python 3).
1.2.2
When running FFmpeg on Windows, disable its crash dialog. Thanks to
jcsaaddupuy.
1.2.1
Fix an unhandled exception when opening non-raw audio files (thanks to
aostanin).
Fix Python 3 compatibility for the raw-file backend.
1.2.0
Add support for FFmpeg on Windows (thanks to Jean-Christophe Saad-Dupuy).
1.1.0
Add support for Sun/NeXT `Au files`_ via the standard-library ``sunau``
module (thanks to Dan Ellis).
1.0.3
Use the rawread (standard-library) backend for .wav files.
1.0.2
Send SIGKILL, not SIGTERM, to ffmpeg processes to avoid occasional hangs.
1.0.1
When GStreamer fails to report a duration, raise an exception instead of
silently setting the duration field to None.
1.0.0
Catch GStreamer's exception when necessary components, such as
``uridecodebin``, are missing.
The GStreamer backend now accepts relative paths.
Fix a hang in GStreamer when the stream finishes before it begins (when
reading broken files).
Initial support for Python 3.
0.8
All decoding errors are now subclasses of ``DecodeError``.
0.7
Fix opening WAV and AIFF files via Unicode filenames.
0.6
Make FFmpeg timeout more robust.
Dump FFmpeg output on timeout.
Fix a nondeterministic hang in the Gstreamer backend.
Fix a file descriptor leak in the MAD backend.
0.5
Fix crash when FFmpeg fails to report a duration.
Fix a hang when FFmpeg fills up its stderr output buffer.
Add a timeout to ``ffmpeg`` tool execution (currently 10 seconds for each
4096-byte read); a ``ReadTimeoutError`` exception is raised if the tool times
out.
0.4
Fix channel count detection for FFmpeg backend.
0.3
Fix a problem with the Gstreamer backend where audio files could be left open
even after the ``GstAudioFile`` was "closed".
0.2
Fix a hang in the GStreamer backend that occurs occasionally on some
platforms.
0.1
Initial release.
.. _Au files: http://en.wikipedia.org/wiki/Au_file_format
Et Cetera
---------
``audioread`` is by Adrian Sampson. It is made available under `the MIT
license`_. An alternative to this module is `decoder.py`_.
.. _the MIT license: http://www.opensource.org/licenses/mit-license.php
.. _decoder.py: http://www.brailleweb.com/cgi-bin/python.py

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Wheel-Version: 1.0
Generator: poetry-core 2.2.1
Root-Is-Purelib: true
Tag: py3-none-any

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Copyright (c) 2011-2018 Adrian Sampson
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
OR OTHER DEALINGS IN THE SOFTWARE.

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# This file is part of audioread.
# Copyright 2013, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Multi-library, cross-platform audio decoding."""
from . import ffdec
from .exceptions import DecodeError, NoBackendError
from .base import AudioFile # noqa
def _gst_available():
"""Determine whether Gstreamer and the Python GObject bindings are
installed.
"""
try:
import gi
except ImportError:
return False
try:
gi.require_version('Gst', '1.0')
except (ValueError, AttributeError):
return False
try:
from gi.repository import Gst # noqa
except ImportError:
return False
return True
def _ca_available():
"""Determines whether CoreAudio is available (i.e., we're running on
Mac OS X).
"""
import ctypes.util
lib = ctypes.util.find_library('AudioToolbox')
return lib is not None
def _mad_available():
"""Determines whether the pymad bindings are available."""
try:
import mad # noqa
except ImportError:
return False
else:
return True
# A cache for the available backends.
BACKENDS = []
def available_backends(flush_cache=False):
"""Returns a list of backends that are available on this system.
The list of backends is cached after the first call.
If the parameter `flush_cache` is set to `True`, then the cache
will be flushed and the backend list will be reconstructed.
"""
if BACKENDS and not flush_cache:
return BACKENDS
# Standard-library WAV and AIFF readers.
from . import rawread
result = [rawread.RawAudioFile]
# Core Audio.
if _ca_available():
from . import macca
result.append(macca.ExtAudioFile)
# GStreamer.
if _gst_available():
from . import gstdec
result.append(gstdec.GstAudioFile)
# MAD.
if _mad_available():
from . import maddec
result.append(maddec.MadAudioFile)
# FFmpeg.
if ffdec.available():
result.append(ffdec.FFmpegAudioFile)
# Cache the backends we found
BACKENDS[:] = result
return BACKENDS
def audio_open(path, backends=None):
"""Open an audio file using a library that is available on this
system.
The optional `backends` parameter can be a list of audio file
classes to try opening the file with. If it is not provided,
`audio_open` tries all available backends. If you call this function
many times, you can avoid the cost of checking for available
backends every time by calling `available_backends` once and passing
the result to each `audio_open` call.
If all backends fail to read the file, a NoBackendError exception is
raised.
"""
if backends is None:
backends = available_backends()
for BackendClass in backends:
try:
return BackendClass(path)
except DecodeError:
pass
# All backends failed!
raise NoBackendError()

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# This file is part of audioread.
# Copyright 2021, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
class AudioFile:
"""The base class for all audio file types.
"""

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# This file is part of audioread.
# Copyright 2013, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
class DecodeError(Exception):
"""The base exception class for all decoding errors raised by this
package.
"""
class NoBackendError(DecodeError):
"""The file could not be decoded by any backend. Either no backends
are available or each available backend failed to decode the file.
"""

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# This file is part of audioread.
# Copyright 2014, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Read audio data using the ffmpeg command line tool via its standard
output.
"""
import queue
import re
import subprocess
import sys
import threading
import time
from io import DEFAULT_BUFFER_SIZE
from .exceptions import DecodeError
from .base import AudioFile
COMMANDS = ('ffmpeg', 'avconv')
if sys.platform == "win32":
PROC_FLAGS = 0x08000000
else:
PROC_FLAGS = 0
class FFmpegError(DecodeError):
pass
class CommunicationError(FFmpegError):
"""Raised when the output of FFmpeg is not parseable."""
class UnsupportedError(FFmpegError):
"""The file could not be decoded by FFmpeg."""
class NotInstalledError(FFmpegError):
"""Could not find the ffmpeg binary."""
class ReadTimeoutError(FFmpegError):
"""Reading from the ffmpeg command-line tool timed out."""
class QueueReaderThread(threading.Thread):
"""A thread that consumes data from a filehandle and sends the data
over a Queue.
"""
def __init__(self, fh, blocksize=1024, discard=False):
super().__init__()
self.fh = fh
self.blocksize = blocksize
self.daemon = True
self.discard = discard
self.queue = None if discard else queue.Queue()
def run(self):
while True:
data = self.fh.read(self.blocksize)
if not self.discard:
self.queue.put(data)
if not data:
# Stream closed (EOF).
break
def popen_multiple(commands, command_args, *args, **kwargs):
"""Like `subprocess.Popen`, but can try multiple commands in case
some are not available.
`commands` is an iterable of command names and `command_args` are
the rest of the arguments that, when appended to the command name,
make up the full first argument to `subprocess.Popen`. The
other positional and keyword arguments are passed through.
"""
for i, command in enumerate(commands):
cmd = [command] + command_args
try:
return subprocess.Popen(cmd, *args, **kwargs)
except OSError:
if i == len(commands) - 1:
# No more commands to try.
raise
def available():
"""Detect whether the FFmpeg backend can be used on this system.
"""
try:
proc = popen_multiple(
COMMANDS,
['-version'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
creationflags=PROC_FLAGS,
)
except OSError:
return False
else:
proc.communicate()
return proc.returncode == 0
# For Windows error switch management, we need a lock to keep the mode
# adjustment atomic.
windows_error_mode_lock = threading.Lock()
class FFmpegAudioFile(AudioFile):
"""An audio file decoded by the ffmpeg command-line utility."""
def __init__(self, filename, block_size=DEFAULT_BUFFER_SIZE):
# On Windows, we need to disable the subprocess's crash dialog
# in case it dies. Passing SEM_NOGPFAULTERRORBOX to SetErrorMode
# disables this behavior.
windows = sys.platform.startswith("win")
if windows:
windows_error_mode_lock.acquire()
SEM_NOGPFAULTERRORBOX = 0x0002
import ctypes
# We call SetErrorMode in two steps to avoid overriding
# existing error mode.
previous_error_mode = \
ctypes.windll.kernel32.SetErrorMode(SEM_NOGPFAULTERRORBOX)
ctypes.windll.kernel32.SetErrorMode(
previous_error_mode | SEM_NOGPFAULTERRORBOX
)
try:
self.proc = popen_multiple(
COMMANDS,
['-i', filename, '-f', 's16le', '-'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
stdin=subprocess.DEVNULL,
creationflags=PROC_FLAGS,
)
except OSError:
raise NotInstalledError()
finally:
# Reset previous error mode on Windows. (We can change this
# back now because the flag was inherited by the subprocess;
# we don't need to keep it set in the parent process.)
if windows:
try:
import ctypes
ctypes.windll.kernel32.SetErrorMode(previous_error_mode)
finally:
windows_error_mode_lock.release()
# Start another thread to consume the standard output of the
# process, which contains raw audio data.
self.stdout_reader = QueueReaderThread(self.proc.stdout, block_size)
self.stdout_reader.start()
# Read relevant information from stderr.
self._get_info()
# Start a separate thread to read the rest of the data from
# stderr. This (a) avoids filling up the OS buffer and (b)
# collects the error output for diagnosis.
self.stderr_reader = QueueReaderThread(self.proc.stderr)
self.stderr_reader.start()
def read_data(self, timeout=10.0):
"""Read blocks of raw PCM data from the file."""
# Read from stdout in a separate thread and consume data from
# the queue.
start_time = time.time()
while True:
# Wait for data to be available or a timeout.
data = None
try:
data = self.stdout_reader.queue.get(timeout=timeout)
if data:
yield data
else:
# End of file.
break
except queue.Empty:
# Queue read timed out.
end_time = time.time()
if not data:
if end_time - start_time >= timeout:
# Nothing interesting has happened for a while --
# FFmpeg is probably hanging.
raise ReadTimeoutError('ffmpeg output: {}'.format(
b''.join(self.stderr_reader.queue.queue)
))
else:
start_time = end_time
# Keep waiting.
continue
def _get_info(self):
"""Reads the tool's output from its stderr stream, extracts the
relevant information, and parses it.
"""
out_parts = []
while True:
line = self.proc.stderr.readline()
if not line:
# EOF and data not found.
raise CommunicationError("stream info not found")
# In Python 3, result of reading from stderr is bytes.
if isinstance(line, bytes):
line = line.decode('utf8', 'ignore')
line = line.strip().lower()
if 'no such file' in line:
raise OSError('file not found')
elif 'invalid data found' in line:
raise UnsupportedError()
elif 'duration:' in line:
out_parts.append(line)
elif 'audio:' in line:
out_parts.append(line)
self._parse_info(''.join(out_parts))
break
def _parse_info(self, s):
"""Given relevant data from the ffmpeg output, set audio
parameter fields on this object.
"""
# Sample rate.
match = re.search(r'(\d+) hz', s)
if match:
self.samplerate = int(match.group(1))
else:
self.samplerate = 0
# Channel count.
match = re.search(r'hz, ([^,]+),', s)
if match:
mode = match.group(1)
if mode == 'stereo':
self.channels = 2
else:
cmatch = re.match(r'(\d+)\.?(\d)?', mode)
if cmatch:
self.channels = sum(map(int, cmatch.group().split('.')))
else:
self.channels = 1
else:
self.channels = 0
# Duration.
match = re.search(
r'duration: (\d+):(\d+):(\d+).(\d)', s
)
if match:
durparts = list(map(int, match.groups()))
duration = (
durparts[0] * 60 * 60 +
durparts[1] * 60 +
durparts[2] +
float(durparts[3]) / 10
)
self.duration = duration
else:
# No duration found.
self.duration = 0
def close(self):
"""Close the ffmpeg process used to perform the decoding."""
if hasattr(self, 'proc'):
# First check the process's execution status before attempting to
# kill it. This fixes an issue on Windows Subsystem for Linux where
# ffmpeg closes normally on its own, but never updates
# `returncode`.
self.proc.poll()
# Kill the process if it is still running.
if self.proc.returncode is None:
self.proc.kill()
self.proc.wait()
# Wait for the stream-reading threads to exit. (They need to
# stop reading before we can close the streams.)
if hasattr(self, 'stderr_reader'):
self.stderr_reader.join()
if hasattr(self, 'stdout_reader'):
self.stdout_reader.join()
# Close the stdout and stderr streams that were opened by Popen,
# which should occur regardless of if the process terminated
# cleanly.
self.proc.stdout.close()
self.proc.stderr.close()
def __del__(self):
self.close()
# Iteration.
def __iter__(self):
return self.read_data()
# Context manager.
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.close()
return False

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# This file is part of audioread.
# Copyright 2011, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Use Gstreamer to decode audio files.
To read an audio file, pass it to the constructor for GstAudioFile()
and then iterate over the contents:
>>> f = GstAudioFile('something.mp3')
>>> try:
>>> for block in f:
>>> ...
>>> finally:
>>> f.close()
Note that there are a few complications caused by Gstreamer's
asynchronous architecture. This module spawns its own Gobject main-
loop thread; I'm not sure how that will interact with other main
loops if your program has them. Also, in order to stop the thread
and terminate your program normally, you need to call the close()
method on every GstAudioFile you create. Conveniently, the file can be
used as a context manager to make this simpler:
>>> with GstAudioFile('something.mp3') as f:
>>> for block in f:
>>> ...
Iterating a GstAudioFile yields strings containing short integer PCM
data. You can also read the sample rate and channel count from the
file:
>>> with GstAudioFile('something.mp3') as f:
>>> print f.samplerate
>>> print f.channels
>>> print f.duration
"""
import gi
gi.require_version('Gst', '1.0')
from gi.repository import GLib, Gst
import sys
import threading
import os
import queue
from urllib.parse import quote
from .exceptions import DecodeError
from .base import AudioFile
QUEUE_SIZE = 10
BUFFER_SIZE = 10
SENTINEL = '__GSTDEC_SENTINEL__'
# Exceptions.
class GStreamerError(DecodeError):
pass
class UnknownTypeError(GStreamerError):
"""Raised when Gstreamer can't decode the given file type."""
def __init__(self, streaminfo):
super().__init__(
"can't decode stream: " + streaminfo
)
self.streaminfo = streaminfo
class FileReadError(GStreamerError):
"""Raised when the file can't be read at all."""
pass
class NoStreamError(GStreamerError):
"""Raised when the file was read successfully but no audio streams
were found.
"""
def __init__(self):
super().__init__('no audio streams found')
class MetadataMissingError(GStreamerError):
"""Raised when GStreamer fails to report stream metadata (duration,
channels, or sample rate).
"""
pass
class IncompleteGStreamerError(GStreamerError):
"""Raised when necessary components of GStreamer (namely, the
principal plugin packages) are missing.
"""
def __init__(self):
super().__init__(
'missing GStreamer base plugins'
)
# Managing the Gobject main loop thread.
_shared_loop_thread = None
_loop_thread_lock = threading.RLock()
Gst.init(None)
def get_loop_thread():
"""Get the shared main-loop thread.
"""
global _shared_loop_thread
with _loop_thread_lock:
if not _shared_loop_thread:
# Start a new thread.
_shared_loop_thread = MainLoopThread()
_shared_loop_thread.start()
return _shared_loop_thread
class MainLoopThread(threading.Thread):
"""A daemon thread encapsulating a Gobject main loop.
"""
def __init__(self):
super().__init__()
self.loop = GLib.MainLoop.new(None, False)
self.daemon = True
def run(self):
self.loop.run()
# The decoder.
class GstAudioFile(AudioFile):
"""Reads raw audio data from any audio file that Gstreamer
knows how to decode.
>>> with GstAudioFile('something.mp3') as f:
>>> print f.samplerate
>>> print f.channels
>>> print f.duration
>>> for block in f:
>>> do_something(block)
Iterating the object yields blocks of 16-bit PCM data. Three
pieces of stream information are also available: samplerate (in Hz),
number of channels, and duration (in seconds).
It's very important that the client call close() when it's done
with the object. Otherwise, the program is likely to hang on exit.
Alternatively, of course, one can just use the file as a context
manager, as shown above.
"""
def __init__(self, path):
self.running = False
self.finished = False
# Set up the Gstreamer pipeline.
self.pipeline = Gst.Pipeline()
self.dec = Gst.ElementFactory.make("uridecodebin", None)
self.conv = Gst.ElementFactory.make("audioconvert", None)
self.sink = Gst.ElementFactory.make("appsink", None)
if self.dec is None or self.conv is None or self.sink is None:
# uridecodebin, audioconvert, or appsink is missing. We need
# gst-plugins-base.
raise IncompleteGStreamerError()
# Register for bus signals.
bus = self.pipeline.get_bus()
bus.add_signal_watch()
bus.connect("message::eos", self._message)
bus.connect("message::error", self._message)
# Configure the input.
uri = 'file://' + quote(os.path.abspath(path))
self.dec.set_property("uri", uri)
# The callback to connect the input.
self.dec.connect("pad-added", self._pad_added)
self.dec.connect("no-more-pads", self._no_more_pads)
# And a callback if decoding fails.
self.dec.connect("unknown-type", self._unkown_type)
# Configure the output.
# We want short integer data.
self.sink.set_property(
'caps',
Gst.Caps.from_string('audio/x-raw, format=(string)S16LE'),
)
# TODO set endianness?
# Set up the characteristics of the output. We don't want to
# drop any data (nothing is real-time here); we should bound
# the memory usage of the internal queue; and, most
# importantly, setting "sync" to False disables the default
# behavior in which you consume buffers in real time. This way,
# we get data as soon as it's decoded.
self.sink.set_property('drop', False)
self.sink.set_property('max-buffers', BUFFER_SIZE)
self.sink.set_property('sync', False)
# The callback to receive decoded data.
self.sink.set_property('emit-signals', True)
self.sink.connect("new-sample", self._new_sample)
# We'll need to know when the stream becomes ready and we get
# its attributes. This semaphore will become available when the
# caps are received. That way, when __init__() returns, the file
# (and its attributes) will be ready for reading.
self.ready_sem = threading.Semaphore(0)
self.caps_handler = self.sink.get_static_pad("sink").connect(
"notify::caps", self._notify_caps
)
# Link up everything but the decoder (which must be linked only
# when it becomes ready).
self.pipeline.add(self.dec)
self.pipeline.add(self.conv)
self.pipeline.add(self.sink)
self.conv.link(self.sink)
# Set up the queue for data and run the main thread.
self.queue = queue.Queue(QUEUE_SIZE)
self.thread = get_loop_thread()
# This wil get filled with an exception if opening fails.
self.read_exc = None
# Return as soon as the stream is ready!
self.running = True
self.got_caps = False
self.pipeline.set_state(Gst.State.PLAYING)
self.ready_sem.acquire()
if self.read_exc:
# An error occurred before the stream became ready.
self.close(True)
raise self.read_exc
# Gstreamer callbacks.
def _notify_caps(self, pad, args):
"""The callback for the sinkpad's "notify::caps" signal.
"""
# The sink has started to receive data, so the stream is ready.
# This also is our opportunity to read information about the
# stream.
self.got_caps = True
info = pad.get_current_caps().get_structure(0)
# Stream attributes.
self.channels = info.get_int('channels')[1]
self.samplerate = info.get_int('rate')[1]
# Query duration.
success, length = pad.get_peer().query_duration(Gst.Format.TIME)
if success:
self.duration = length / 1000000000
else:
self.read_exc = MetadataMissingError('duration not available')
# Allow constructor to complete.
self.ready_sem.release()
_got_a_pad = False
def _pad_added(self, element, pad):
"""The callback for GstElement's "pad-added" signal.
"""
# Decoded data is ready. Connect up the decoder, finally.
name = pad.query_caps(None).to_string()
if name.startswith('audio/x-raw'):
nextpad = self.conv.get_static_pad('sink')
if not nextpad.is_linked():
self._got_a_pad = True
pad.link(nextpad)
def _no_more_pads(self, element):
"""The callback for GstElement's "no-more-pads" signal.
"""
# Sent when the pads are done adding (i.e., there are no more
# streams in the file). If we haven't gotten at least one
# decodable stream, raise an exception.
if not self._got_a_pad:
self.read_exc = NoStreamError()
self.ready_sem.release() # No effect if we've already started.
def _new_sample(self, sink):
"""The callback for appsink's "new-sample" signal.
"""
if self.running:
# New data is available from the pipeline! Dump it into our
# queue (or possibly block if we're full).
buf = sink.emit('pull-sample').get_buffer()
# We can't use Gst.Buffer.extract() to read the data as it crashes
# when called through PyGObject. We also can't use
# Gst.Buffer.extract_dup() because we have no way in Python to free
# the memory that it returns. Instead we get access to the actual
# data via Gst.Memory.map().
mem = buf.get_all_memory()
success, info = mem.map(Gst.MapFlags.READ)
if success:
if isinstance(info.data, memoryview):
# We need to copy the data as the memoryview is released
# when we call mem.unmap()
data = bytes(info.data)
else:
# GStreamer Python bindings <= 1.16 return a copy of the
# data as bytes()
data = info.data
mem.unmap(info)
self.queue.put(data)
else:
raise GStreamerError("Unable to map buffer memory while reading the file.")
return Gst.FlowReturn.OK
def _unkown_type(self, uridecodebin, decodebin, caps):
"""The callback for decodebin's "unknown-type" signal.
"""
# This is called *before* the stream becomes ready when the
# file can't be read.
streaminfo = caps.to_string()
if not streaminfo.startswith('audio/'):
# Ignore non-audio (e.g., video) decode errors.
return
self.read_exc = UnknownTypeError(streaminfo)
self.ready_sem.release()
def _message(self, bus, message):
"""The callback for GstBus's "message" signal (for two kinds of
messages).
"""
if not self.finished:
if message.type == Gst.MessageType.EOS:
# The file is done. Tell the consumer thread.
self.queue.put(SENTINEL)
if not self.got_caps:
# If the stream ends before _notify_caps was called, this
# is an invalid file.
self.read_exc = NoStreamError()
self.ready_sem.release()
elif message.type == Gst.MessageType.ERROR:
gerror, debug = message.parse_error()
if 'not-linked' in debug:
self.read_exc = NoStreamError()
elif 'No such file' in debug:
self.read_exc = IOError('resource not found')
else:
self.read_exc = FileReadError(debug)
self.ready_sem.release()
# Iteration.
def __next__(self):
# Wait for data from the Gstreamer callbacks.
val = self.queue.get()
if val == SENTINEL:
# End of stream.
raise StopIteration
return val
def __iter__(self):
return self
# Cleanup.
def close(self, force=False):
"""Close the file and clean up associated resources.
Calling `close()` a second time has no effect.
"""
if self.running or force:
self.running = False
self.finished = True
# Unregister for signals, which we registered for above with
# `add_signal_watch`. (Without this, GStreamer leaks file
# descriptors.)
self.pipeline.get_bus().remove_signal_watch()
# Stop reading the file.
self.dec.set_property("uri", None)
# Block spurious signals.
self.sink.get_static_pad("sink").disconnect(self.caps_handler)
# Make space in the output queue to let the decoder thread
# finish. (Otherwise, the thread blocks on its enqueue and
# the interpreter hangs.)
try:
self.queue.get_nowait()
except queue.Empty:
pass
# Halt the pipeline (closing file).
self.pipeline.set_state(Gst.State.NULL)
def __del__(self):
self.close()
# Context manager.
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.close()
return False
# Smoke test.
if __name__ == '__main__':
for path in sys.argv[1:]:
path = os.path.abspath(os.path.expanduser(path))
with GstAudioFile(path) as f:
print(f.channels)
print(f.samplerate)
print(f.duration)
for s in f:
print(len(s), ord(s[0]))

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# This file is part of audioread.
# Copyright 2011, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Read audio files using CoreAudio on Mac OS X."""
import copy
import ctypes
import ctypes.util
import os
import sys
from .exceptions import DecodeError
from .base import AudioFile
# CoreFoundation and CoreAudio libraries along with their function
# prototypes.
def _load_framework(name):
return ctypes.cdll.LoadLibrary(ctypes.util.find_library(name))
_coreaudio = _load_framework('AudioToolbox')
_corefoundation = _load_framework('CoreFoundation')
# Convert CFStrings to C strings.
_corefoundation.CFStringGetCStringPtr.restype = ctypes.c_char_p
_corefoundation.CFStringGetCStringPtr.argtypes = [ctypes.c_void_p,
ctypes.c_int]
# Free memory.
_corefoundation.CFRelease.argtypes = [ctypes.c_void_p]
# Create a file:// URL.
_corefoundation.CFURLCreateFromFileSystemRepresentation.restype = \
ctypes.c_void_p
_corefoundation.CFURLCreateFromFileSystemRepresentation.argtypes = \
[ctypes.c_int, ctypes.c_char_p, ctypes.c_int, ctypes.c_bool]
# Get a string representation of a URL.
_corefoundation.CFURLGetString.restype = ctypes.c_void_p
_corefoundation.CFURLGetString.argtypes = [ctypes.c_void_p]
# Open an audio file for reading.
_coreaudio.ExtAudioFileOpenURL.restype = ctypes.c_int
_coreaudio.ExtAudioFileOpenURL.argtypes = [ctypes.c_void_p, ctypes.c_void_p]
# Set audio file property.
_coreaudio.ExtAudioFileSetProperty.restype = ctypes.c_int
_coreaudio.ExtAudioFileSetProperty.argtypes = \
[ctypes.c_void_p, ctypes.c_uint, ctypes.c_uint, ctypes.c_void_p]
# Get audio file property.
_coreaudio.ExtAudioFileGetProperty.restype = ctypes.c_int
_coreaudio.ExtAudioFileGetProperty.argtypes = \
[ctypes.c_void_p, ctypes.c_uint, ctypes.c_void_p, ctypes.c_void_p]
# Read from an audio file.
_coreaudio.ExtAudioFileRead.restype = ctypes.c_int
_coreaudio.ExtAudioFileRead.argtypes = \
[ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p]
# Close/free an audio file.
_coreaudio.ExtAudioFileDispose.restype = ctypes.c_int
_coreaudio.ExtAudioFileDispose.argtypes = [ctypes.c_void_p]
# Constants used in CoreAudio.
def multi_char_literal(chars):
"""Emulates character integer literals in C. Given a string "abc",
returns the value of the C single-quoted literal 'abc'.
"""
num = 0
for index, char in enumerate(chars):
shift = (len(chars) - index - 1) * 8
num |= ord(char) << shift
return num
PROP_FILE_DATA_FORMAT = multi_char_literal('ffmt')
PROP_CLIENT_DATA_FORMAT = multi_char_literal('cfmt')
PROP_LENGTH = multi_char_literal('#frm')
AUDIO_ID_PCM = multi_char_literal('lpcm')
PCM_IS_FLOAT = 1 << 0
PCM_IS_BIG_ENDIAN = 1 << 1
PCM_IS_SIGNED_INT = 1 << 2
PCM_IS_PACKED = 1 << 3
ERROR_TYPE = multi_char_literal('typ?')
ERROR_FORMAT = multi_char_literal('fmt?')
ERROR_NOT_FOUND = -43
# Check for errors in functions that return error codes.
class MacError(DecodeError):
def __init__(self, code):
if code == ERROR_TYPE:
msg = 'unsupported audio type'
elif code == ERROR_FORMAT:
msg = 'unsupported format'
else:
msg = 'error %i' % code
super().__init__(msg)
def check(err):
"""If err is nonzero, raise a MacError exception."""
if err == ERROR_NOT_FOUND:
raise OSError('file not found')
elif err != 0:
raise MacError(err)
# CoreFoundation objects.
class CFObject:
def __init__(self, obj):
if obj == 0:
raise ValueError('object is zero')
self._obj = obj
def __del__(self):
if _corefoundation:
_corefoundation.CFRelease(self._obj)
class CFURL(CFObject):
def __init__(self, filename):
filename = os.path.abspath(os.path.expanduser(filename))
if not isinstance(filename, bytes):
filename = filename.encode(sys.getfilesystemencoding())
url = _corefoundation.CFURLCreateFromFileSystemRepresentation(
0, filename, len(filename), False
)
super().__init__(url)
def __str__(self):
cfstr = _corefoundation.CFURLGetString(self._obj)
out = _corefoundation.CFStringGetCStringPtr(cfstr, 0)
# Resulting CFString does not need to be released according to docs.
return out
# Structs used in CoreAudio.
class AudioStreamBasicDescription(ctypes.Structure):
_fields_ = [
("mSampleRate", ctypes.c_double),
("mFormatID", ctypes.c_uint),
("mFormatFlags", ctypes.c_uint),
("mBytesPerPacket", ctypes.c_uint),
("mFramesPerPacket", ctypes.c_uint),
("mBytesPerFrame", ctypes.c_uint),
("mChannelsPerFrame", ctypes.c_uint),
("mBitsPerChannel", ctypes.c_uint),
("mReserved", ctypes.c_uint),
]
class AudioBuffer(ctypes.Structure):
_fields_ = [
("mNumberChannels", ctypes.c_uint),
("mDataByteSize", ctypes.c_uint),
("mData", ctypes.c_void_p),
]
class AudioBufferList(ctypes.Structure):
_fields_ = [
("mNumberBuffers", ctypes.c_uint),
("mBuffers", AudioBuffer * 1),
]
# Main functionality.
class ExtAudioFile(AudioFile):
"""A CoreAudio "extended audio file". Reads information and raw PCM
audio data from any file that CoreAudio knows how to decode.
>>> with ExtAudioFile('something.m4a') as f:
>>> print f.samplerate
>>> print f.channels
>>> print f.duration
>>> for block in f:
>>> do_something(block)
"""
def __init__(self, filename):
url = CFURL(filename)
try:
self._obj = self._open_url(url)
except:
self.closed = True
raise
del url
self.closed = False
self._file_fmt = None
self._client_fmt = None
self.setup()
@classmethod
def _open_url(cls, url):
"""Given a CFURL Python object, return an opened ExtAudioFileRef.
"""
file_obj = ctypes.c_void_p()
check(_coreaudio.ExtAudioFileOpenURL(
url._obj, ctypes.byref(file_obj)
))
return file_obj
def set_client_format(self, desc):
"""Get the client format description. This describes the
encoding of the data that the program will read from this
object.
"""
assert desc.mFormatID == AUDIO_ID_PCM
check(_coreaudio.ExtAudioFileSetProperty(
self._obj, PROP_CLIENT_DATA_FORMAT, ctypes.sizeof(desc),
ctypes.byref(desc)
))
self._client_fmt = desc
def get_file_format(self):
"""Get the file format description. This describes the type of
data stored on disk.
"""
# Have cached file format?
if self._file_fmt is not None:
return self._file_fmt
# Make the call to retrieve it.
desc = AudioStreamBasicDescription()
size = ctypes.c_int(ctypes.sizeof(desc))
check(_coreaudio.ExtAudioFileGetProperty(
self._obj, PROP_FILE_DATA_FORMAT, ctypes.byref(size),
ctypes.byref(desc)
))
# Cache result.
self._file_fmt = desc
return desc
@property
def channels(self):
"""The number of channels in the audio source."""
return int(self.get_file_format().mChannelsPerFrame)
@property
def samplerate(self):
"""Gets the sample rate of the audio."""
return int(self.get_file_format().mSampleRate)
@property
def duration(self):
"""Gets the length of the file in seconds (a float)."""
return float(self.nframes) / self.samplerate
@property
def nframes(self):
"""Gets the number of frames in the source file."""
length = ctypes.c_long()
size = ctypes.c_int(ctypes.sizeof(length))
check(_coreaudio.ExtAudioFileGetProperty(
self._obj, PROP_LENGTH, ctypes.byref(size), ctypes.byref(length)
))
return length.value
def setup(self, bitdepth=16):
"""Set the client format parameters, specifying the desired PCM
audio data format to be read from the file. Must be called
before reading from the file.
"""
fmt = self.get_file_format()
newfmt = copy.copy(fmt)
newfmt.mFormatID = AUDIO_ID_PCM
newfmt.mFormatFlags = \
PCM_IS_SIGNED_INT | PCM_IS_PACKED
newfmt.mBitsPerChannel = bitdepth
newfmt.mBytesPerPacket = \
(fmt.mChannelsPerFrame * newfmt.mBitsPerChannel // 8)
newfmt.mFramesPerPacket = 1
newfmt.mBytesPerFrame = newfmt.mBytesPerPacket
self.set_client_format(newfmt)
def read_data(self, blocksize=4096):
"""Generates byte strings reflecting the audio data in the file.
"""
frames = ctypes.c_uint(blocksize // self._client_fmt.mBytesPerFrame)
buf = ctypes.create_string_buffer(blocksize)
buflist = AudioBufferList()
buflist.mNumberBuffers = 1
buflist.mBuffers[0].mNumberChannels = \
self._client_fmt.mChannelsPerFrame
buflist.mBuffers[0].mDataByteSize = blocksize
buflist.mBuffers[0].mData = ctypes.cast(buf, ctypes.c_void_p)
while True:
check(_coreaudio.ExtAudioFileRead(
self._obj, ctypes.byref(frames), ctypes.byref(buflist)
))
assert buflist.mNumberBuffers == 1
size = buflist.mBuffers[0].mDataByteSize
if not size:
break
data = ctypes.cast(buflist.mBuffers[0].mData,
ctypes.POINTER(ctypes.c_char))
blob = data[:size]
yield blob
def close(self):
"""Close the audio file and free associated memory."""
if not self.closed:
check(_coreaudio.ExtAudioFileDispose(self._obj))
self.closed = True
def __del__(self):
if _coreaudio:
self.close()
# Context manager methods.
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.close()
return False
# Iteration.
def __iter__(self):
return self.read_data()

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linedance-app/venv/lib/python3.12/site-packages/audioread/maddec.py Normal file
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# This file is part of audioread.
# Copyright 2011, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Decode MPEG audio files with MAD (via pymad)."""
import mad
from . import DecodeError
from .base import AudioFile
class UnsupportedError(DecodeError):
"""The file is not readable by MAD."""
class MadAudioFile(AudioFile):
"""MPEG audio file decoder using the MAD library."""
def __init__(self, filename):
self.fp = open(filename, 'rb')
self.mf = mad.MadFile(self.fp)
if not self.mf.total_time(): # Indicates a failed open.
self.fp.close()
raise UnsupportedError()
def close(self):
if hasattr(self, 'fp'):
self.fp.close()
if hasattr(self, 'mf'):
del self.mf
def read_blocks(self, block_size=4096):
"""Generates buffers containing PCM data for the audio file.
"""
while True:
out = self.mf.read(block_size)
if not out:
break
yield bytes(out)
@property
def samplerate(self):
"""Sample rate in Hz."""
return self.mf.samplerate()
@property
def duration(self):
"""Length of the audio in seconds (a float)."""
return float(self.mf.total_time()) / 1000
@property
def channels(self):
"""The number of channels."""
if self.mf.mode() == mad.MODE_SINGLE_CHANNEL:
return 1
elif self.mf.mode() in (mad.MODE_DUAL_CHANNEL,
mad.MODE_JOINT_STEREO,
mad.MODE_STEREO):
return 2
else:
# Other mode?
return 2
def __del__(self):
self.close()
# Iteration.
def __iter__(self):
return self.read_blocks()
# Context manager.
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.close()
return False

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# This file is part of audioread.
# Copyright 2011, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Uses standard-library modules to read AIFF, AIFF-C, and WAV files."""
import aifc
import audioop
import struct
import sunau
import wave
from .exceptions import DecodeError
from .base import AudioFile
# Produce two-byte (16-bit) output samples.
TARGET_WIDTH = 2
# Python 3.4 added support for 24-bit (3-byte) samples.
SUPPORTED_WIDTHS = (1, 2, 3, 4)
class UnsupportedError(DecodeError):
"""File is not an AIFF, WAV, or Au file."""
class BitWidthError(DecodeError):
"""The file uses an unsupported bit width."""
def byteswap(s):
"""Swaps the endianness of the bytestring s, which must be an array
of shorts (16-bit signed integers). This is probably less efficient
than it should be.
"""
assert len(s) % 2 == 0
parts = []
for i in range(0, len(s), 2):
chunk = s[i:i + 2]
newchunk = struct.pack('<h', *struct.unpack('>h', chunk))
parts.append(newchunk)
return b''.join(parts)
class RawAudioFile(AudioFile):
"""An AIFF, WAV, or Au file that can be read by the Python standard
library modules ``wave``, ``aifc``, and ``sunau``.
"""
def __init__(self, filename):
self._fh = open(filename, 'rb')
try:
self._file = aifc.open(self._fh)
except aifc.Error:
# Return to the beginning of the file to try the next reader.
self._fh.seek(0)
else:
self._needs_byteswap = True
self._check()
return
try:
self._file = wave.open(self._fh)
except wave.Error:
self._fh.seek(0)
pass
else:
self._needs_byteswap = False
self._check()
return
try:
self._file = sunau.open(self._fh)
except sunau.Error:
self._fh.seek(0)
pass
else:
self._needs_byteswap = True
self._check()
return
# None of the three libraries could open the file.
self._fh.close()
raise UnsupportedError()
def _check(self):
"""Check that the files' parameters allow us to decode it and
raise an error otherwise.
"""
if self._file.getsampwidth() not in SUPPORTED_WIDTHS:
self.close()
raise BitWidthError()
def close(self):
"""Close the underlying file."""
self._file.close()
self._fh.close()
@property
def channels(self):
"""Number of audio channels."""
return self._file.getnchannels()
@property
def samplerate(self):
"""Sample rate in Hz."""
return self._file.getframerate()
@property
def duration(self):
"""Length of the audio in seconds (a float)."""
return float(self._file.getnframes()) / self.samplerate
def read_data(self, block_samples=1024):
"""Generates blocks of PCM data found in the file."""
old_width = self._file.getsampwidth()
while True:
data = self._file.readframes(block_samples)
if not data:
break
# Make sure we have the desired bitdepth and endianness.
data = audioop.lin2lin(data, old_width, TARGET_WIDTH)
if self._needs_byteswap and self._file.getcomptype() != 'sowt':
# Big-endian data. Swap endianness.
data = byteswap(data)
yield data
# Context manager.
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.close()
return False
# Iteration.
def __iter__(self):
return self.read_data()

1
linedance-app/venv/lib/python3.12/site-packages/certifi-2026.2.25.dist-info/INSTALLER Normal file
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pip

78
linedance-app/venv/lib/python3.12/site-packages/certifi-2026.2.25.dist-info/METADATA Normal file
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Metadata-Version: 2.4
Name: certifi
Version: 2026.2.25
Summary: Python package for providing Mozilla's CA Bundle.
Home-page: https://github.com/certifi/python-certifi
Author: Kenneth Reitz
Author-email: me@kennethreitz.com
License: MPL-2.0
Project-URL: Source, https://github.com/certifi/python-certifi
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)
Classifier: Natural Language :: English
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: 3.13
Classifier: Programming Language :: Python :: 3.14
Requires-Python: >=3.7
License-File: LICENSE
Dynamic: author
Dynamic: author-email
Dynamic: classifier
Dynamic: description
Dynamic: home-page
Dynamic: license
Dynamic: license-file
Dynamic: project-url
Dynamic: requires-python
Dynamic: summary
Certifi: Python SSL Certificates
================================
Certifi provides Mozilla's carefully curated collection of Root Certificates for
validating the trustworthiness of SSL certificates while verifying the identity
of TLS hosts. It has been extracted from the `Requests`_ project.
Installation
------------
``certifi`` is available on PyPI. Simply install it with ``pip``::
$ pip install certifi
Usage
-----
To reference the installed certificate authority (CA) bundle, you can use the
built-in function::
>>> import certifi
>>> certifi.where()
'/usr/local/lib/python3.7/site-packages/certifi/cacert.pem'
Or from the command line::
$ python -m certifi
/usr/local/lib/python3.7/site-packages/certifi/cacert.pem
Enjoy!
.. _`Requests`: https://requests.readthedocs.io/en/master/
Addition/Removal of Certificates
--------------------------------
Certifi does not support any addition/removal or other modification of the
CA trust store content. This project is intended to provide a reliable and
highly portable root of trust to python deployments. Look to upstream projects
for methods to use alternate trust.

14
linedance-app/venv/lib/python3.12/site-packages/certifi-2026.2.25.dist-info/RECORD Normal file
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@@ -0,0 +1,14 @@
certifi-2026.2.25.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
certifi-2026.2.25.dist-info/METADATA,sha256=4NMuGXdg_hBiRA3paKVXYcDmE3VXEBWxTvCL2xlDyPU,2474
certifi-2026.2.25.dist-info/RECORD,,
certifi-2026.2.25.dist-info/WHEEL,sha256=YCfwYGOYMi5Jhw2fU4yNgwErybb2IX5PEwBKV4ZbdBo,91
certifi-2026.2.25.dist-info/licenses/LICENSE,sha256=6TcW2mucDVpKHfYP5pWzcPBpVgPSH2-D8FPkLPwQyvc,989
certifi-2026.2.25.dist-info/top_level.txt,sha256=KMu4vUCfsjLrkPbSNdgdekS-pVJzBAJFO__nI8NF6-U,8
certifi/__init__.py,sha256=c9eaYufv1pSLl0Q8QNcMiMLLH4WquDcxdPyKjmI4opY,94
certifi/__main__.py,sha256=xBBoj905TUWBLRGANOcf7oi6e-3dMP4cEoG9OyMs11g,243
certifi/__pycache__/__init__.cpython-312.pyc,,
certifi/__pycache__/__main__.cpython-312.pyc,,
certifi/__pycache__/core.cpython-312.pyc,,
certifi/cacert.pem,sha256=_JFloSQDJj5-v72te-ej6sD6XTJdPHBGXyjTaQByyig,272441
certifi/core.py,sha256=XFXycndG5pf37ayeF8N32HUuDafsyhkVMbO4BAPWHa0,3394
certifi/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0

5
linedance-app/venv/lib/python3.12/site-packages/certifi-2026.2.25.dist-info/WHEEL Normal file
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Wheel-Version: 1.0
Generator: setuptools (82.0.0)
Root-Is-Purelib: true
Tag: py3-none-any

20
linedance-app/venv/lib/python3.12/site-packages/certifi-2026.2.25.dist-info/licenses/LICENSE Normal file
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This package contains a modified version of ca-bundle.crt:
ca-bundle.crt -- Bundle of CA Root Certificates
This is a bundle of X.509 certificates of public Certificate Authorities
(CA). These were automatically extracted from Mozilla's root certificates
file (certdata.txt). This file can be found in the mozilla source tree:
https://hg.mozilla.org/mozilla-central/file/tip/security/nss/lib/ckfw/builtins/certdata.txt
It contains the certificates in PEM format and therefore
can be directly used with curl / libcurl / php_curl, or with
an Apache+mod_ssl webserver for SSL client authentication.
Just configure this file as the SSLCACertificateFile.#
***** BEGIN LICENSE BLOCK *****
This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain
one at http://mozilla.org/MPL/2.0/.
***** END LICENSE BLOCK *****
@(#) $RCSfile: certdata.txt,v $ $Revision: 1.80 $ $Date: 2011/11/03 15:11:58 $

1
linedance-app/venv/lib/python3.12/site-packages/certifi-2026.2.25.dist-info/top_level.txt Normal file
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certifi

4
linedance-app/venv/lib/python3.12/site-packages/certifi/__init__.py Normal file
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from .core import contents, where
__all__ = ["contents", "where"]
__version__ = "2026.02.25"

12
linedance-app/venv/lib/python3.12/site-packages/certifi/__main__.py Normal file
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import argparse
from certifi import contents, where
parser = argparse.ArgumentParser()
parser.add_argument("-c", "--contents", action="store_true")
args = parser.parse_args()
if args.contents:
print(contents())
else:
print(where())

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"""
certifi.py
~~~~~~~~~~
This module returns the installation location of cacert.pem or its contents.
"""
import sys
import atexit
def exit_cacert_ctx() -> None:
_CACERT_CTX.__exit__(None, None, None) # type: ignore[union-attr]
if sys.version_info >= (3, 11):
from importlib.resources import as_file, files
_CACERT_CTX = None
_CACERT_PATH = None
def where() -> str:
# This is slightly terrible, but we want to delay extracting the file
# in cases where we're inside of a zipimport situation until someone
# actually calls where(), but we don't want to re-extract the file
# on every call of where(), so we'll do it once then store it in a
# global variable.
global _CACERT_CTX
global _CACERT_PATH
if _CACERT_PATH is None:
# This is slightly janky, the importlib.resources API wants you to
# manage the cleanup of this file, so it doesn't actually return a
# path, it returns a context manager that will give you the path
# when you enter it and will do any cleanup when you leave it. In
# the common case of not needing a temporary file, it will just
# return the file system location and the __exit__() is a no-op.
#
# We also have to hold onto the actual context manager, because
# it will do the cleanup whenever it gets garbage collected, so
# we will also store that at the global level as well.
_CACERT_CTX = as_file(files("certifi").joinpath("cacert.pem"))
_CACERT_PATH = str(_CACERT_CTX.__enter__())
atexit.register(exit_cacert_ctx)
return _CACERT_PATH
def contents() -> str:
return files("certifi").joinpath("cacert.pem").read_text(encoding="ascii")
else:
from importlib.resources import path as get_path, read_text
_CACERT_CTX = None
_CACERT_PATH = None
def where() -> str:
# This is slightly terrible, but we want to delay extracting the
# file in cases where we're inside of a zipimport situation until
# someone actually calls where(), but we don't want to re-extract
# the file on every call of where(), so we'll do it once then store
# it in a global variable.
global _CACERT_CTX
global _CACERT_PATH
if _CACERT_PATH is None:
# This is slightly janky, the importlib.resources API wants you
# to manage the cleanup of this file, so it doesn't actually
# return a path, it returns a context manager that will give
# you the path when you enter it and will do any cleanup when
# you leave it. In the common case of not needing a temporary
# file, it will just return the file system location and the
# __exit__() is a no-op.
#
# We also have to hold onto the actual context manager, because
# it will do the cleanup whenever it gets garbage collected, so
# we will also store that at the global level as well.
_CACERT_CTX = get_path("certifi", "cacert.pem")
_CACERT_PATH = str(_CACERT_CTX.__enter__())
atexit.register(exit_cacert_ctx)
return _CACERT_PATH
def contents() -> str:
return read_text("certifi", "cacert.pem", encoding="ascii")

0
linedance-app/venv/lib/python3.12/site-packages/certifi/py.typed Normal file
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1
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/INSTALLER Normal file
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pip

68
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/METADATA Normal file
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@@ -0,0 +1,68 @@
Metadata-Version: 2.4
Name: cffi
Version: 2.0.0
Summary: Foreign Function Interface for Python calling C code.
Author: Armin Rigo, Maciej Fijalkowski
Maintainer: Matt Davis, Matt Clay, Matti Picus
License-Expression: MIT
Project-URL: Documentation, https://cffi.readthedocs.io/
Project-URL: Changelog, https://cffi.readthedocs.io/en/latest/whatsnew.html
Project-URL: Downloads, https://github.com/python-cffi/cffi/releases
Project-URL: Contact, https://groups.google.com/forum/#!forum/python-cffi
Project-URL: Source Code, https://github.com/python-cffi/cffi
Project-URL: Issue Tracker, https://github.com/python-cffi/cffi/issues
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: 3.13
Classifier: Programming Language :: Python :: 3.14
Classifier: Programming Language :: Python :: Free Threading :: 2 - Beta
Classifier: Programming Language :: Python :: Implementation :: CPython
Requires-Python: >=3.9
Description-Content-Type: text/markdown
License-File: LICENSE
License-File: AUTHORS
Requires-Dist: pycparser; implementation_name != "PyPy"
Dynamic: license-file
[![GitHub Actions Status](https://github.com/python-cffi/cffi/actions/workflows/ci.yaml/badge.svg?branch=main)](https://github.com/python-cffi/cffi/actions/workflows/ci.yaml?query=branch%3Amain++)
[![PyPI version](https://img.shields.io/pypi/v/cffi.svg)](https://pypi.org/project/cffi)
[![Read the Docs](https://img.shields.io/badge/docs-latest-blue.svg)][Documentation]
CFFI
====
Foreign Function Interface for Python calling C code.
Please see the [Documentation] or uncompiled in the `doc/` subdirectory.
Download
--------
[Download page](https://github.com/python-cffi/cffi/releases)
Source Code
-----------
Source code is publicly available on
[GitHub](https://github.com/python-cffi/cffi).
Contact
-------
[Mailing list](https://groups.google.com/forum/#!forum/python-cffi)
Testing/development tips
------------------------
After `git clone` or `wget && tar`, we will get a directory called `cffi` or `cffi-x.x.x`. we call it `repo-directory`. To run tests under CPython, run the following in the `repo-directory`:
pip install pytest
pip install -e . # editable install of CFFI for local development
pytest src/c/ testing/
[Documentation]: http://cffi.readthedocs.org/

49
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/RECORD Normal file
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@@ -0,0 +1,49 @@
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cffi-2.0.0.dist-info/METADATA,sha256=uYzn40F68Im8EtXHNBLZs7FoPM-OxzyYbDWsjJvhujk,2559
cffi-2.0.0.dist-info/RECORD,,
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cffi-2.0.0.dist-info/entry_points.txt,sha256=y6jTxnyeuLnL-XJcDv8uML3n6wyYiGRg8MTp_QGJ9Ho,75
cffi-2.0.0.dist-info/licenses/AUTHORS,sha256=KmemC7-zN1nWfWRf8TG45ta8TK_CMtdR_Kw-2k0xTMg,208
cffi-2.0.0.dist-info/licenses/LICENSE,sha256=W6JN3FcGf5JJrdZEw6_EGl1tw34jQz73Wdld83Cwr2M,1123
cffi-2.0.0.dist-info/top_level.txt,sha256=rE7WR3rZfNKxWI9-jn6hsHCAl7MDkB-FmuQbxWjFehQ,19
cffi/__init__.py,sha256=-ksBQ7MfDzVvbBlV_ftYBWAmEqfA86ljIzMxzaZeAlI,511
cffi/__pycache__/__init__.cpython-312.pyc,,
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cffi/_cffi_include.h,sha256=Exhmgm9qzHWzWivjfTe0D7Xp4rPUkVxdNuwGhMTMzbw,15055
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cffi/backend_ctypes.py,sha256=h5ZIzLc6BFVXnGyc9xPqZWUS7qGy7yFSDqXe68Sa8z4,42454
cffi/cffi_opcode.py,sha256=JDV5l0R0_OadBX_uE7xPPTYtMdmpp8I9UYd6av7aiDU,5731
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cffi/cparser.py,sha256=QUTfmlL-aO-MYR8bFGlvAUHc36OQr7XYLe0WLkGFjRo,44790
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cffi/ffiplatform.py,sha256=avxFjdikYGJoEtmJO7ewVmwG_VEVl6EZ_WaNhZYCqv4,3584
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cffi/parse_c_type.h,sha256=OdwQfwM9ktq6vlCB43exFQmxDBtj2MBNdK8LYl15tjw,5976
cffi/pkgconfig.py,sha256=LP1w7vmWvmKwyqLaU1Z243FOWGNQMrgMUZrvgFuOlco,4374
cffi/recompiler.py,sha256=78J6lMEEOygXNmjN9-fOFFO3j7eW-iFxSrxfvQb54bY,65509
cffi/setuptools_ext.py,sha256=0rCwBJ1W7FHWtiMKfNXsSST88V8UXrui5oeXFlDNLG8,9411
cffi/vengine_cpy.py,sha256=oyQKD23kpE0aChUKA8Jg0e723foPiYzLYEdb-J0MiNs,43881
cffi/vengine_gen.py,sha256=DUlEIrDiVin1Pnhn1sfoamnS5NLqfJcOdhRoeSNeJRg,26939
cffi/verifier.py,sha256=oX8jpaohg2Qm3aHcznidAdvrVm5N4sQYG0a3Eo5mIl4,11182

6
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/WHEEL Normal file
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Wheel-Version: 1.0
Generator: setuptools (80.9.0)
Root-Is-Purelib: false
Tag: cp312-cp312-manylinux_2_17_x86_64
Tag: cp312-cp312-manylinux2014_x86_64

2
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/entry_points.txt Normal file
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[distutils.setup_keywords]
cffi_modules = cffi.setuptools_ext:cffi_modules

8
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/licenses/AUTHORS Normal file
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@@ -0,0 +1,8 @@
This package has been mostly done by Armin Rigo with help from
Maciej Fijałkowski. The idea is heavily based (although not directly
copied) from LuaJIT ffi by Mike Pall.
Other contributors:
Google Inc.

23
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/licenses/LICENSE Normal file
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@@ -0,0 +1,23 @@
Except when otherwise stated (look for LICENSE files in directories or
information at the beginning of each file) all software and
documentation is licensed as follows:
MIT No Attribution
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the
Software is furnished to do so.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

2
linedance-app/venv/lib/python3.12/site-packages/cffi-2.0.0.dist-info/top_level.txt Normal file
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_cffi_backend
cffi

14
linedance-app/venv/lib/python3.12/site-packages/cffi/__init__.py Normal file
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__all__ = ['FFI', 'VerificationError', 'VerificationMissing', 'CDefError',
'FFIError']
from .api import FFI
from .error import CDefError, FFIError, VerificationError, VerificationMissing
from .error import PkgConfigError
__version__ = "2.0.0"
__version_info__ = (2, 0, 0)
# The verifier module file names are based on the CRC32 of a string that
# contains the following version number. It may be older than __version__
# if nothing is clearly incompatible.
__version_verifier_modules__ = "0.8.6"

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linedance-app/venv/lib/python3.12/site-packages/cffi/_cffi_errors.h Normal file
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@@ -0,0 +1,149 @@
#ifndef CFFI_MESSAGEBOX
# ifdef _MSC_VER
# define CFFI_MESSAGEBOX 1
# else
# define CFFI_MESSAGEBOX 0
# endif
#endif
#if CFFI_MESSAGEBOX
/* Windows only: logic to take the Python-CFFI embedding logic
initialization errors and display them in a background thread
with MessageBox. The idea is that if the whole program closes
as a result of this problem, then likely it is already a console
program and you can read the stderr output in the console too.
If it is not a console program, then it will likely show its own
dialog to complain, or generally not abruptly close, and for this
case the background thread should stay alive.
*/
static void *volatile _cffi_bootstrap_text;
static PyObject *_cffi_start_error_capture(void)
{
PyObject *result = NULL;
PyObject *x, *m, *bi;
if (InterlockedCompareExchangePointer(&_cffi_bootstrap_text,
(void *)1, NULL) != NULL)
return (PyObject *)1;
m = PyImport_AddModule("_cffi_error_capture");
if (m == NULL)
goto error;
result = PyModule_GetDict(m);
if (result == NULL)
goto error;
#if PY_MAJOR_VERSION >= 3
bi = PyImport_ImportModule("builtins");
#else
bi = PyImport_ImportModule("__builtin__");
#endif
if (bi == NULL)
goto error;
PyDict_SetItemString(result, "__builtins__", bi);
Py_DECREF(bi);
x = PyRun_String(
"import sys\n"
"class FileLike:\n"
" def write(self, x):\n"
" try:\n"
" of.write(x)\n"
" except: pass\n"
" self.buf += x\n"
" def flush(self):\n"
" pass\n"
"fl = FileLike()\n"
"fl.buf = ''\n"
"of = sys.stderr\n"
"sys.stderr = fl\n"
"def done():\n"
" sys.stderr = of\n"
" return fl.buf\n", /* make sure the returned value stays alive */
Py_file_input,
result, result);
Py_XDECREF(x);
error:
if (PyErr_Occurred())
{
PyErr_WriteUnraisable(Py_None);
PyErr_Clear();
}
return result;
}
#pragma comment(lib, "user32.lib")
static DWORD WINAPI _cffi_bootstrap_dialog(LPVOID ignored)
{
Sleep(666); /* may be interrupted if the whole process is closing */
#if PY_MAJOR_VERSION >= 3
MessageBoxW(NULL, (wchar_t *)_cffi_bootstrap_text,
L"Python-CFFI error",
MB_OK | MB_ICONERROR);
#else
MessageBoxA(NULL, (char *)_cffi_bootstrap_text,
"Python-CFFI error",
MB_OK | MB_ICONERROR);
#endif
_cffi_bootstrap_text = NULL;
return 0;
}
static void _cffi_stop_error_capture(PyObject *ecap)
{
PyObject *s;
void *text;
if (ecap == (PyObject *)1)
return;
if (ecap == NULL)
goto error;
s = PyRun_String("done()", Py_eval_input, ecap, ecap);
if (s == NULL)
goto error;
/* Show a dialog box, but in a background thread, and
never show multiple dialog boxes at once. */
#if PY_MAJOR_VERSION >= 3
text = PyUnicode_AsWideCharString(s, NULL);
#else
text = PyString_AsString(s);
#endif
_cffi_bootstrap_text = text;
if (text != NULL)
{
HANDLE h;
h = CreateThread(NULL, 0, _cffi_bootstrap_dialog,
NULL, 0, NULL);
if (h != NULL)
CloseHandle(h);
}
/* decref the string, but it should stay alive as 'fl.buf'
in the small module above. It will really be freed only if
we later get another similar error. So it's a leak of at
most one copy of the small module. That's fine for this
situation which is usually a "fatal error" anyway. */
Py_DECREF(s);
PyErr_Clear();
return;
error:
_cffi_bootstrap_text = NULL;
PyErr_Clear();
}
#else
static PyObject *_cffi_start_error_capture(void) { return NULL; }
static void _cffi_stop_error_capture(PyObject *ecap) { }
#endif

389
linedance-app/venv/lib/python3.12/site-packages/cffi/_cffi_include.h Normal file
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#define _CFFI_
/* We try to define Py_LIMITED_API before including Python.h.
Mess: we can only define it if Py_DEBUG, Py_TRACE_REFS and
Py_REF_DEBUG are not defined. This is a best-effort approximation:
we can learn about Py_DEBUG from pyconfig.h, but it is unclear if
the same works for the other two macros. Py_DEBUG implies them,
but not the other way around.
The implementation is messy (issue #350): on Windows, with _MSC_VER,
we have to define Py_LIMITED_API even before including pyconfig.h.
In that case, we guess what pyconfig.h will do to the macros above,
and check our guess after the #include.
Note that on Windows, with CPython 3.x, you need >= 3.5 and virtualenv
version >= 16.0.0. With older versions of either, you don't get a
copy of PYTHON3.DLL in the virtualenv. We can't check the version of
CPython *before* we even include pyconfig.h. ffi.set_source() puts
a ``#define _CFFI_NO_LIMITED_API'' at the start of this file if it is
running on Windows < 3.5, as an attempt at fixing it, but that's
arguably wrong because it may not be the target version of Python.
Still better than nothing I guess. As another workaround, you can
remove the definition of Py_LIMITED_API here.
See also 'py_limited_api' in cffi/setuptools_ext.py.
*/
#if !defined(_CFFI_USE_EMBEDDING) && !defined(Py_LIMITED_API)
# ifdef _MSC_VER
# if !defined(_DEBUG) && !defined(Py_DEBUG) && !defined(Py_TRACE_REFS) && !defined(Py_REF_DEBUG) && !defined(_CFFI_NO_LIMITED_API)
# define Py_LIMITED_API
# endif
# include <pyconfig.h>
/* sanity-check: Py_LIMITED_API will cause crashes if any of these
are also defined. Normally, the Python file PC/pyconfig.h does not
cause any of these to be defined, with the exception that _DEBUG
causes Py_DEBUG. Double-check that. */
# ifdef Py_LIMITED_API
# if defined(Py_DEBUG)
# error "pyconfig.h unexpectedly defines Py_DEBUG, but Py_LIMITED_API is set"
# endif
# if defined(Py_TRACE_REFS)
# error "pyconfig.h unexpectedly defines Py_TRACE_REFS, but Py_LIMITED_API is set"
# endif
# if defined(Py_REF_DEBUG)
# error "pyconfig.h unexpectedly defines Py_REF_DEBUG, but Py_LIMITED_API is set"
# endif
# endif
# else
# include <pyconfig.h>
# if !defined(Py_DEBUG) && !defined(Py_TRACE_REFS) && !defined(Py_REF_DEBUG) && !defined(_CFFI_NO_LIMITED_API)
# define Py_LIMITED_API
# endif
# endif
#endif
#include <Python.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <stddef.h>
#include "parse_c_type.h"
/* this block of #ifs should be kept exactly identical between
c/_cffi_backend.c, cffi/vengine_cpy.py, cffi/vengine_gen.py
and cffi/_cffi_include.h */
#if defined(_MSC_VER)
# include <malloc.h> /* for alloca() */
# if _MSC_VER < 1600 /* MSVC < 2010 */
typedef __int8 int8_t;
typedef __int16 int16_t;
typedef __int32 int32_t;
typedef __int64 int64_t;
typedef unsigned __int8 uint8_t;
typedef unsigned __int16 uint16_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;
typedef __int8 int_least8_t;
typedef __int16 int_least16_t;
typedef __int32 int_least32_t;
typedef __int64 int_least64_t;
typedef unsigned __int8 uint_least8_t;
typedef unsigned __int16 uint_least16_t;
typedef unsigned __int32 uint_least32_t;
typedef unsigned __int64 uint_least64_t;
typedef __int8 int_fast8_t;
typedef __int16 int_fast16_t;
typedef __int32 int_fast32_t;
typedef __int64 int_fast64_t;
typedef unsigned __int8 uint_fast8_t;
typedef unsigned __int16 uint_fast16_t;
typedef unsigned __int32 uint_fast32_t;
typedef unsigned __int64 uint_fast64_t;
typedef __int64 intmax_t;
typedef unsigned __int64 uintmax_t;
# else
# include <stdint.h>
# endif
# if _MSC_VER < 1800 /* MSVC < 2013 */
# ifndef __cplusplus
typedef unsigned char _Bool;
# endif
# endif
# define _cffi_float_complex_t _Fcomplex /* include <complex.h> for it */
# define _cffi_double_complex_t _Dcomplex /* include <complex.h> for it */
#else
# include <stdint.h>
# if (defined (__SVR4) && defined (__sun)) || defined(_AIX) || defined(__hpux)
# include <alloca.h>
# endif
# define _cffi_float_complex_t float _Complex
# define _cffi_double_complex_t double _Complex
#endif
#ifdef __GNUC__
# define _CFFI_UNUSED_FN __attribute__((unused))
#else
# define _CFFI_UNUSED_FN /* nothing */
#endif
#ifdef __cplusplus
# ifndef _Bool
typedef bool _Bool; /* semi-hackish: C++ has no _Bool; bool is builtin */
# endif
#endif
/********** CPython-specific section **********/
#ifndef PYPY_VERSION
#if PY_MAJOR_VERSION >= 3
# define PyInt_FromLong PyLong_FromLong
#endif
#define _cffi_from_c_double PyFloat_FromDouble
#define _cffi_from_c_float PyFloat_FromDouble
#define _cffi_from_c_long PyInt_FromLong
#define _cffi_from_c_ulong PyLong_FromUnsignedLong
#define _cffi_from_c_longlong PyLong_FromLongLong
#define _cffi_from_c_ulonglong PyLong_FromUnsignedLongLong
#define _cffi_from_c__Bool PyBool_FromLong
#define _cffi_to_c_double PyFloat_AsDouble
#define _cffi_to_c_float PyFloat_AsDouble
#define _cffi_from_c_int(x, type) \
(((type)-1) > 0 ? /* unsigned */ \
(sizeof(type) < sizeof(long) ? \
PyInt_FromLong((long)x) : \
sizeof(type) == sizeof(long) ? \
PyLong_FromUnsignedLong((unsigned long)x) : \
PyLong_FromUnsignedLongLong((unsigned long long)x)) : \
(sizeof(type) <= sizeof(long) ? \
PyInt_FromLong((long)x) : \
PyLong_FromLongLong((long long)x)))
#define _cffi_to_c_int(o, type) \
((type)( \
sizeof(type) == 1 ? (((type)-1) > 0 ? (type)_cffi_to_c_u8(o) \
: (type)_cffi_to_c_i8(o)) : \
sizeof(type) == 2 ? (((type)-1) > 0 ? (type)_cffi_to_c_u16(o) \
: (type)_cffi_to_c_i16(o)) : \
sizeof(type) == 4 ? (((type)-1) > 0 ? (type)_cffi_to_c_u32(o) \
: (type)_cffi_to_c_i32(o)) : \
sizeof(type) == 8 ? (((type)-1) > 0 ? (type)_cffi_to_c_u64(o) \
: (type)_cffi_to_c_i64(o)) : \
(Py_FatalError("unsupported size for type " #type), (type)0)))
#define _cffi_to_c_i8 \
((int(*)(PyObject *))_cffi_exports[1])
#define _cffi_to_c_u8 \
((int(*)(PyObject *))_cffi_exports[2])
#define _cffi_to_c_i16 \
((int(*)(PyObject *))_cffi_exports[3])
#define _cffi_to_c_u16 \
((int(*)(PyObject *))_cffi_exports[4])
#define _cffi_to_c_i32 \
((int(*)(PyObject *))_cffi_exports[5])
#define _cffi_to_c_u32 \
((unsigned int(*)(PyObject *))_cffi_exports[6])
#define _cffi_to_c_i64 \
((long long(*)(PyObject *))_cffi_exports[7])
#define _cffi_to_c_u64 \
((unsigned long long(*)(PyObject *))_cffi_exports[8])
#define _cffi_to_c_char \
((int(*)(PyObject *))_cffi_exports[9])
#define _cffi_from_c_pointer \
((PyObject *(*)(char *, struct _cffi_ctypedescr *))_cffi_exports[10])
#define _cffi_to_c_pointer \
((char *(*)(PyObject *, struct _cffi_ctypedescr *))_cffi_exports[11])
#define _cffi_get_struct_layout \
not used any more
#define _cffi_restore_errno \
((void(*)(void))_cffi_exports[13])
#define _cffi_save_errno \
((void(*)(void))_cffi_exports[14])
#define _cffi_from_c_char \
((PyObject *(*)(char))_cffi_exports[15])
#define _cffi_from_c_deref \
((PyObject *(*)(char *, struct _cffi_ctypedescr *))_cffi_exports[16])
#define _cffi_to_c \
((int(*)(char *, struct _cffi_ctypedescr *, PyObject *))_cffi_exports[17])
#define _cffi_from_c_struct \
((PyObject *(*)(char *, struct _cffi_ctypedescr *))_cffi_exports[18])
#define _cffi_to_c_wchar_t \
((_cffi_wchar_t(*)(PyObject *))_cffi_exports[19])
#define _cffi_from_c_wchar_t \
((PyObject *(*)(_cffi_wchar_t))_cffi_exports[20])
#define _cffi_to_c_long_double \
((long double(*)(PyObject *))_cffi_exports[21])
#define _cffi_to_c__Bool \
((_Bool(*)(PyObject *))_cffi_exports[22])
#define _cffi_prepare_pointer_call_argument \
((Py_ssize_t(*)(struct _cffi_ctypedescr *, \
PyObject *, char **))_cffi_exports[23])
#define _cffi_convert_array_from_object \
((int(*)(char *, struct _cffi_ctypedescr *, PyObject *))_cffi_exports[24])
#define _CFFI_CPIDX 25
#define _cffi_call_python \
((void(*)(struct _cffi_externpy_s *, char *))_cffi_exports[_CFFI_CPIDX])
#define _cffi_to_c_wchar3216_t \
((int(*)(PyObject *))_cffi_exports[26])
#define _cffi_from_c_wchar3216_t \
((PyObject *(*)(int))_cffi_exports[27])
#define _CFFI_NUM_EXPORTS 28
struct _cffi_ctypedescr;
static void *_cffi_exports[_CFFI_NUM_EXPORTS];
#define _cffi_type(index) ( \
assert((((uintptr_t)_cffi_types[index]) & 1) == 0), \
(struct _cffi_ctypedescr *)_cffi_types[index])
static PyObject *_cffi_init(const char *module_name, Py_ssize_t version,
const struct _cffi_type_context_s *ctx)
{
PyObject *module, *o_arg, *new_module;
void *raw[] = {
(void *)module_name,
(void *)version,
(void *)_cffi_exports,
(void *)ctx,
};
module = PyImport_ImportModule("_cffi_backend");
if (module == NULL)
goto failure;
o_arg = PyLong_FromVoidPtr((void *)raw);
if (o_arg == NULL)
goto failure;
new_module = PyObject_CallMethod(
module, (char *)"_init_cffi_1_0_external_module", (char *)"O", o_arg);
Py_DECREF(o_arg);
Py_DECREF(module);
return new_module;
failure:
Py_XDECREF(module);
return NULL;
}
#ifdef HAVE_WCHAR_H
typedef wchar_t _cffi_wchar_t;
#else
typedef uint16_t _cffi_wchar_t; /* same random pick as _cffi_backend.c */
#endif
_CFFI_UNUSED_FN static uint16_t _cffi_to_c_char16_t(PyObject *o)
{
if (sizeof(_cffi_wchar_t) == 2)
return (uint16_t)_cffi_to_c_wchar_t(o);
else
return (uint16_t)_cffi_to_c_wchar3216_t(o);
}
_CFFI_UNUSED_FN static PyObject *_cffi_from_c_char16_t(uint16_t x)
{
if (sizeof(_cffi_wchar_t) == 2)
return _cffi_from_c_wchar_t((_cffi_wchar_t)x);
else
return _cffi_from_c_wchar3216_t((int)x);
}
_CFFI_UNUSED_FN static int _cffi_to_c_char32_t(PyObject *o)
{
if (sizeof(_cffi_wchar_t) == 4)
return (int)_cffi_to_c_wchar_t(o);
else
return (int)_cffi_to_c_wchar3216_t(o);
}
_CFFI_UNUSED_FN static PyObject *_cffi_from_c_char32_t(unsigned int x)
{
if (sizeof(_cffi_wchar_t) == 4)
return _cffi_from_c_wchar_t((_cffi_wchar_t)x);
else
return _cffi_from_c_wchar3216_t((int)x);
}
union _cffi_union_alignment_u {
unsigned char m_char;
unsigned short m_short;
unsigned int m_int;
unsigned long m_long;
unsigned long long m_longlong;
float m_float;
double m_double;
long double m_longdouble;
};
struct _cffi_freeme_s {
struct _cffi_freeme_s *next;
union _cffi_union_alignment_u alignment;
};
_CFFI_UNUSED_FN static int
_cffi_convert_array_argument(struct _cffi_ctypedescr *ctptr, PyObject *arg,
char **output_data, Py_ssize_t datasize,
struct _cffi_freeme_s **freeme)
{
char *p;
if (datasize < 0)
return -1;
p = *output_data;
if (p == NULL) {
struct _cffi_freeme_s *fp = (struct _cffi_freeme_s *)PyObject_Malloc(
offsetof(struct _cffi_freeme_s, alignment) + (size_t)datasize);
if (fp == NULL)
return -1;
fp->next = *freeme;
*freeme = fp;
p = *output_data = (char *)&fp->alignment;
}
memset((void *)p, 0, (size_t)datasize);
return _cffi_convert_array_from_object(p, ctptr, arg);
}
_CFFI_UNUSED_FN static void
_cffi_free_array_arguments(struct _cffi_freeme_s *freeme)
{
do {
void *p = (void *)freeme;
freeme = freeme->next;
PyObject_Free(p);
} while (freeme != NULL);
}
/********** end CPython-specific section **********/
#else
_CFFI_UNUSED_FN
static void (*_cffi_call_python_org)(struct _cffi_externpy_s *, char *);
# define _cffi_call_python _cffi_call_python_org
#endif
#define _cffi_array_len(array) (sizeof(array) / sizeof((array)[0]))
#define _cffi_prim_int(size, sign) \
((size) == 1 ? ((sign) ? _CFFI_PRIM_INT8 : _CFFI_PRIM_UINT8) : \
(size) == 2 ? ((sign) ? _CFFI_PRIM_INT16 : _CFFI_PRIM_UINT16) : \
(size) == 4 ? ((sign) ? _CFFI_PRIM_INT32 : _CFFI_PRIM_UINT32) : \
(size) == 8 ? ((sign) ? _CFFI_PRIM_INT64 : _CFFI_PRIM_UINT64) : \
_CFFI__UNKNOWN_PRIM)
#define _cffi_prim_float(size) \
((size) == sizeof(float) ? _CFFI_PRIM_FLOAT : \
(size) == sizeof(double) ? _CFFI_PRIM_DOUBLE : \
(size) == sizeof(long double) ? _CFFI__UNKNOWN_LONG_DOUBLE : \
_CFFI__UNKNOWN_FLOAT_PRIM)
#define _cffi_check_int(got, got_nonpos, expected) \
((got_nonpos) == (expected <= 0) && \
(got) == (unsigned long long)expected)
#ifdef MS_WIN32
# define _cffi_stdcall __stdcall
#else
# define _cffi_stdcall /* nothing */
#endif
#ifdef __cplusplus
}
#endif

550
linedance-app/venv/lib/python3.12/site-packages/cffi/_embedding.h Normal file
View File

@@ -0,0 +1,550 @@
/***** Support code for embedding *****/
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_WIN32)
# define CFFI_DLLEXPORT __declspec(dllexport)
#elif defined(__GNUC__)
# define CFFI_DLLEXPORT __attribute__((visibility("default")))
#else
# define CFFI_DLLEXPORT /* nothing */
#endif
/* There are two global variables of type _cffi_call_python_fnptr:
* _cffi_call_python, which we declare just below, is the one called
by ``extern "Python"`` implementations.
* _cffi_call_python_org, which on CPython is actually part of the
_cffi_exports[] array, is the function pointer copied from
_cffi_backend. If _cffi_start_python() fails, then this is set
to NULL; otherwise, it should never be NULL.
After initialization is complete, both are equal. However, the
first one remains equal to &_cffi_start_and_call_python until the
very end of initialization, when we are (or should be) sure that
concurrent threads also see a completely initialized world, and
only then is it changed.
*/
#undef _cffi_call_python
typedef void (*_cffi_call_python_fnptr)(struct _cffi_externpy_s *, char *);
static void _cffi_start_and_call_python(struct _cffi_externpy_s *, char *);
static _cffi_call_python_fnptr _cffi_call_python = &_cffi_start_and_call_python;
#ifndef _MSC_VER
/* --- Assuming a GCC not infinitely old --- */
# define cffi_compare_and_swap(l,o,n) __sync_bool_compare_and_swap(l,o,n)
# define cffi_write_barrier() __sync_synchronize()
# if !defined(__amd64__) && !defined(__x86_64__) && \
!defined(__i386__) && !defined(__i386)
# define cffi_read_barrier() __sync_synchronize()
# else
# define cffi_read_barrier() (void)0
# endif
#else
/* --- Windows threads version --- */
# include <Windows.h>
# define cffi_compare_and_swap(l,o,n) \
(InterlockedCompareExchangePointer(l,n,o) == (o))
# define cffi_write_barrier() InterlockedCompareExchange(&_cffi_dummy,0,0)
# define cffi_read_barrier() (void)0
static volatile LONG _cffi_dummy;
#endif
#ifdef WITH_THREAD
# ifndef _MSC_VER
# include <pthread.h>
static pthread_mutex_t _cffi_embed_startup_lock;
# else
static CRITICAL_SECTION _cffi_embed_startup_lock;
# endif
static char _cffi_embed_startup_lock_ready = 0;
#endif
static void _cffi_acquire_reentrant_mutex(void)
{
static void *volatile lock = NULL;
while (!cffi_compare_and_swap(&lock, NULL, (void *)1)) {
/* should ideally do a spin loop instruction here, but
hard to do it portably and doesn't really matter I
think: pthread_mutex_init() should be very fast, and
this is only run at start-up anyway. */
}
#ifdef WITH_THREAD
if (!_cffi_embed_startup_lock_ready) {
# ifndef _MSC_VER
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&_cffi_embed_startup_lock, &attr);
# else
InitializeCriticalSection(&_cffi_embed_startup_lock);
# endif
_cffi_embed_startup_lock_ready = 1;
}
#endif
while (!cffi_compare_and_swap(&lock, (void *)1, NULL))
;
#ifndef _MSC_VER
pthread_mutex_lock(&_cffi_embed_startup_lock);
#else
EnterCriticalSection(&_cffi_embed_startup_lock);
#endif
}
static void _cffi_release_reentrant_mutex(void)
{
#ifndef _MSC_VER
pthread_mutex_unlock(&_cffi_embed_startup_lock);
#else
LeaveCriticalSection(&_cffi_embed_startup_lock);
#endif
}
/********** CPython-specific section **********/
#ifndef PYPY_VERSION
#include "_cffi_errors.h"
#define _cffi_call_python_org _cffi_exports[_CFFI_CPIDX]
PyMODINIT_FUNC _CFFI_PYTHON_STARTUP_FUNC(void); /* forward */
static void _cffi_py_initialize(void)
{
/* XXX use initsigs=0, which "skips initialization registration of
signal handlers, which might be useful when Python is
embedded" according to the Python docs. But review and think
if it should be a user-controllable setting.
XXX we should also give a way to write errors to a buffer
instead of to stderr.
XXX if importing 'site' fails, CPython (any version) calls
exit(). Should we try to work around this behavior here?
*/
Py_InitializeEx(0);
}
static int _cffi_initialize_python(void)
{
/* This initializes Python, imports _cffi_backend, and then the
present .dll/.so is set up as a CPython C extension module.
*/
int result;
PyGILState_STATE state;
PyObject *pycode=NULL, *global_dict=NULL, *x;
PyObject *builtins;
state = PyGILState_Ensure();
/* Call the initxxx() function from the present module. It will
create and initialize us as a CPython extension module, instead
of letting the startup Python code do it---it might reimport
the same .dll/.so and get maybe confused on some platforms.
It might also have troubles locating the .dll/.so again for all
I know.
*/
(void)_CFFI_PYTHON_STARTUP_FUNC();
if (PyErr_Occurred())
goto error;
/* Now run the Python code provided to ffi.embedding_init_code().
*/
pycode = Py_CompileString(_CFFI_PYTHON_STARTUP_CODE,
"<init code for '" _CFFI_MODULE_NAME "'>",
Py_file_input);
if (pycode == NULL)
goto error;
global_dict = PyDict_New();
if (global_dict == NULL)
goto error;
builtins = PyEval_GetBuiltins();
if (builtins == NULL)
goto error;
if (PyDict_SetItemString(global_dict, "__builtins__", builtins) < 0)
goto error;
x = PyEval_EvalCode(
#if PY_MAJOR_VERSION < 3
(PyCodeObject *)
#endif
pycode, global_dict, global_dict);
if (x == NULL)
goto error;
Py_DECREF(x);
/* Done! Now if we've been called from
_cffi_start_and_call_python() in an ``extern "Python"``, we can
only hope that the Python code did correctly set up the
corresponding @ffi.def_extern() function. Otherwise, the
general logic of ``extern "Python"`` functions (inside the
_cffi_backend module) will find that the reference is still
missing and print an error.
*/
result = 0;
done:
Py_XDECREF(pycode);
Py_XDECREF(global_dict);
PyGILState_Release(state);
return result;
error:;
{
/* Print as much information as potentially useful.
Debugging load-time failures with embedding is not fun
*/
PyObject *ecap;
PyObject *exception, *v, *tb, *f, *modules, *mod;
PyErr_Fetch(&exception, &v, &tb);
ecap = _cffi_start_error_capture();
f = PySys_GetObject((char *)"stderr");
if (f != NULL && f != Py_None) {
PyFile_WriteString(
"Failed to initialize the Python-CFFI embedding logic:\n\n", f);
}
if (exception != NULL) {
PyErr_NormalizeException(&exception, &v, &tb);
PyErr_Display(exception, v, tb);
}
Py_XDECREF(exception);
Py_XDECREF(v);
Py_XDECREF(tb);
if (f != NULL && f != Py_None) {
PyFile_WriteString("\nFrom: " _CFFI_MODULE_NAME
"\ncompiled with cffi version: 2.0.0"
"\n_cffi_backend module: ", f);
modules = PyImport_GetModuleDict();
mod = PyDict_GetItemString(modules, "_cffi_backend");
if (mod == NULL) {
PyFile_WriteString("not loaded", f);
}
else {
v = PyObject_GetAttrString(mod, "__file__");
PyFile_WriteObject(v, f, 0);
Py_XDECREF(v);
}
PyFile_WriteString("\nsys.path: ", f);
PyFile_WriteObject(PySys_GetObject((char *)"path"), f, 0);
PyFile_WriteString("\n\n", f);
}
_cffi_stop_error_capture(ecap);
}
result = -1;
goto done;
}
#if PY_VERSION_HEX < 0x03080000
PyAPI_DATA(char *) _PyParser_TokenNames[]; /* from CPython */
#endif
static int _cffi_carefully_make_gil(void)
{
/* This does the basic initialization of Python. It can be called
completely concurrently from unrelated threads. It assumes
that we don't hold the GIL before (if it exists), and we don't
hold it afterwards.
(What it really does used to be completely different in Python 2
and Python 3, with the Python 2 solution avoiding the spin-lock
around the Py_InitializeEx() call. However, after recent changes
to CPython 2.7 (issue #358) it no longer works. So we use the
Python 3 solution everywhere.)
This initializes Python by calling Py_InitializeEx().
Important: this must not be called concurrently at all.
So we use a global variable as a simple spin lock. This global
variable must be from 'libpythonX.Y.so', not from this
cffi-based extension module, because it must be shared from
different cffi-based extension modules.
In Python < 3.8, we choose
_PyParser_TokenNames[0] as a completely arbitrary pointer value
that is never written to. The default is to point to the
string "ENDMARKER". We change it temporarily to point to the
next character in that string. (Yes, I know it's REALLY
obscure.)
In Python >= 3.8, this string array is no longer writable, so
instead we pick PyCapsuleType.tp_version_tag. We can't change
Python < 3.8 because someone might use a mixture of cffi
embedded modules, some of which were compiled before this file
changed.
In Python >= 3.12, this stopped working because that particular
tp_version_tag gets modified during interpreter startup. It's
arguably a bad idea before 3.12 too, but again we can't change
that because someone might use a mixture of cffi embedded
modules, and no-one reported a bug so far. In Python >= 3.12
we go instead for PyCapsuleType.tp_as_buffer, which is supposed
to always be NULL. We write to it temporarily a pointer to
a struct full of NULLs, which is semantically the same.
*/
#ifdef WITH_THREAD
# if PY_VERSION_HEX < 0x03080000
char *volatile *lock = (char *volatile *)_PyParser_TokenNames;
char *old_value, *locked_value;
while (1) { /* spin loop */
old_value = *lock;
locked_value = old_value + 1;
if (old_value[0] == 'E') {
assert(old_value[1] == 'N');
if (cffi_compare_and_swap(lock, old_value, locked_value))
break;
}
else {
assert(old_value[0] == 'N');
/* should ideally do a spin loop instruction here, but
hard to do it portably and doesn't really matter I
think: PyEval_InitThreads() should be very fast, and
this is only run at start-up anyway. */
}
}
# else
# if PY_VERSION_HEX < 0x030C0000
int volatile *lock = (int volatile *)&PyCapsule_Type.tp_version_tag;
int old_value, locked_value = -42;
assert(!(PyCapsule_Type.tp_flags & Py_TPFLAGS_HAVE_VERSION_TAG));
# else
static struct ebp_s { PyBufferProcs buf; int mark; } empty_buffer_procs;
empty_buffer_procs.mark = -42;
PyBufferProcs *volatile *lock = (PyBufferProcs *volatile *)
&PyCapsule_Type.tp_as_buffer;
PyBufferProcs *old_value, *locked_value = &empty_buffer_procs.buf;
# endif
while (1) { /* spin loop */
old_value = *lock;
if (old_value == 0) {
if (cffi_compare_and_swap(lock, old_value, locked_value))
break;
}
else {
# if PY_VERSION_HEX < 0x030C0000
assert(old_value == locked_value);
# else
/* The pointer should point to a possibly different
empty_buffer_procs from another C extension module */
assert(((struct ebp_s *)old_value)->mark == -42);
# endif
/* should ideally do a spin loop instruction here, but
hard to do it portably and doesn't really matter I
think: PyEval_InitThreads() should be very fast, and
this is only run at start-up anyway. */
}
}
# endif
#endif
/* call Py_InitializeEx() */
if (!Py_IsInitialized()) {
_cffi_py_initialize();
#if PY_VERSION_HEX < 0x03070000
PyEval_InitThreads();
#endif
PyEval_SaveThread(); /* release the GIL */
/* the returned tstate must be the one that has been stored into the
autoTLSkey by _PyGILState_Init() called from Py_Initialize(). */
}
else {
#if PY_VERSION_HEX < 0x03070000
/* PyEval_InitThreads() is always a no-op from CPython 3.7 */
PyGILState_STATE state = PyGILState_Ensure();
PyEval_InitThreads();
PyGILState_Release(state);
#endif
}
#ifdef WITH_THREAD
/* release the lock */
while (!cffi_compare_and_swap(lock, locked_value, old_value))
;
#endif
return 0;
}
/********** end CPython-specific section **********/
#else
/********** PyPy-specific section **********/
PyMODINIT_FUNC _CFFI_PYTHON_STARTUP_FUNC(const void *[]); /* forward */
static struct _cffi_pypy_init_s {
const char *name;
void *func; /* function pointer */
const char *code;
} _cffi_pypy_init = {
_CFFI_MODULE_NAME,
_CFFI_PYTHON_STARTUP_FUNC,
_CFFI_PYTHON_STARTUP_CODE,
};
extern int pypy_carefully_make_gil(const char *);
extern int pypy_init_embedded_cffi_module(int, struct _cffi_pypy_init_s *);
static int _cffi_carefully_make_gil(void)
{
return pypy_carefully_make_gil(_CFFI_MODULE_NAME);
}
static int _cffi_initialize_python(void)
{
return pypy_init_embedded_cffi_module(0xB011, &_cffi_pypy_init);
}
/********** end PyPy-specific section **********/
#endif
#ifdef __GNUC__
__attribute__((noinline))
#endif
static _cffi_call_python_fnptr _cffi_start_python(void)
{
/* Delicate logic to initialize Python. This function can be
called multiple times concurrently, e.g. when the process calls
its first ``extern "Python"`` functions in multiple threads at
once. It can also be called recursively, in which case we must
ignore it. We also have to consider what occurs if several
different cffi-based extensions reach this code in parallel
threads---it is a different copy of the code, then, and we
can't have any shared global variable unless it comes from
'libpythonX.Y.so'.
Idea:
* _cffi_carefully_make_gil(): "carefully" call
PyEval_InitThreads() (possibly with Py_InitializeEx() first).
* then we use a (local) custom lock to make sure that a call to this
cffi-based extension will wait if another call to the *same*
extension is running the initialization in another thread.
It is reentrant, so that a recursive call will not block, but
only one from a different thread.
* then we grab the GIL and (Python 2) we call Py_InitializeEx().
At this point, concurrent calls to Py_InitializeEx() are not
possible: we have the GIL.
* do the rest of the specific initialization, which may
temporarily release the GIL but not the custom lock.
Only release the custom lock when we are done.
*/
static char called = 0;
if (_cffi_carefully_make_gil() != 0)
return NULL;
_cffi_acquire_reentrant_mutex();
/* Here the GIL exists, but we don't have it. We're only protected
from concurrency by the reentrant mutex. */
/* This file only initializes the embedded module once, the first
time this is called, even if there are subinterpreters. */
if (!called) {
called = 1; /* invoke _cffi_initialize_python() only once,
but don't set '_cffi_call_python' right now,
otherwise concurrent threads won't call
this function at all (we need them to wait) */
if (_cffi_initialize_python() == 0) {
/* now initialization is finished. Switch to the fast-path. */
/* We would like nobody to see the new value of
'_cffi_call_python' without also seeing the rest of the
data initialized. However, this is not possible. But
the new value of '_cffi_call_python' is the function
'cffi_call_python()' from _cffi_backend. So: */
cffi_write_barrier();
/* ^^^ we put a write barrier here, and a corresponding
read barrier at the start of cffi_call_python(). This
ensures that after that read barrier, we see everything
done here before the write barrier.
*/
assert(_cffi_call_python_org != NULL);
_cffi_call_python = (_cffi_call_python_fnptr)_cffi_call_python_org;
}
else {
/* initialization failed. Reset this to NULL, even if it was
already set to some other value. Future calls to
_cffi_start_python() are still forced to occur, and will
always return NULL from now on. */
_cffi_call_python_org = NULL;
}
}
_cffi_release_reentrant_mutex();
return (_cffi_call_python_fnptr)_cffi_call_python_org;
}
static
void _cffi_start_and_call_python(struct _cffi_externpy_s *externpy, char *args)
{
_cffi_call_python_fnptr fnptr;
int current_err = errno;
#ifdef _MSC_VER
int current_lasterr = GetLastError();
#endif
fnptr = _cffi_start_python();
if (fnptr == NULL) {
fprintf(stderr, "function %s() called, but initialization code "
"failed. Returning 0.\n", externpy->name);
memset(args, 0, externpy->size_of_result);
}
#ifdef _MSC_VER
SetLastError(current_lasterr);
#endif
errno = current_err;
if (fnptr != NULL)
fnptr(externpy, args);
}
/* The cffi_start_python() function makes sure Python is initialized
and our cffi module is set up. It can be called manually from the
user C code. The same effect is obtained automatically from any
dll-exported ``extern "Python"`` function. This function returns
-1 if initialization failed, 0 if all is OK. */
_CFFI_UNUSED_FN
static int cffi_start_python(void)
{
if (_cffi_call_python == &_cffi_start_and_call_python) {
if (_cffi_start_python() == NULL)
return -1;
}
cffi_read_barrier();
return 0;
}
#undef cffi_compare_and_swap
#undef cffi_write_barrier
#undef cffi_read_barrier
#ifdef __cplusplus
}
#endif

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try:
# this works on Python < 3.12
from imp import *
except ImportError:
# this is a limited emulation for Python >= 3.12.
# Note that this is used only for tests or for the old ffi.verify().
# This is copied from the source code of Python 3.11.
from _imp import (acquire_lock, release_lock,
is_builtin, is_frozen)
from importlib._bootstrap import _load
from importlib import machinery
import os
import sys
import tokenize
SEARCH_ERROR = 0
PY_SOURCE = 1
PY_COMPILED = 2
C_EXTENSION = 3
PY_RESOURCE = 4
PKG_DIRECTORY = 5
C_BUILTIN = 6
PY_FROZEN = 7
PY_CODERESOURCE = 8
IMP_HOOK = 9
def get_suffixes():
extensions = [(s, 'rb', C_EXTENSION)
for s in machinery.EXTENSION_SUFFIXES]
source = [(s, 'r', PY_SOURCE) for s in machinery.SOURCE_SUFFIXES]
bytecode = [(s, 'rb', PY_COMPILED) for s in machinery.BYTECODE_SUFFIXES]
return extensions + source + bytecode
def find_module(name, path=None):
if not isinstance(name, str):
raise TypeError("'name' must be a str, not {}".format(type(name)))
elif not isinstance(path, (type(None), list)):
# Backwards-compatibility
raise RuntimeError("'path' must be None or a list, "
"not {}".format(type(path)))
if path is None:
if is_builtin(name):
return None, None, ('', '', C_BUILTIN)
elif is_frozen(name):
return None, None, ('', '', PY_FROZEN)
else:
path = sys.path
for entry in path:
package_directory = os.path.join(entry, name)
for suffix in ['.py', machinery.BYTECODE_SUFFIXES[0]]:
package_file_name = '__init__' + suffix
file_path = os.path.join(package_directory, package_file_name)
if os.path.isfile(file_path):
return None, package_directory, ('', '', PKG_DIRECTORY)
for suffix, mode, type_ in get_suffixes():
file_name = name + suffix
file_path = os.path.join(entry, file_name)
if os.path.isfile(file_path):
break
else:
continue
break # Break out of outer loop when breaking out of inner loop.
else:
raise ImportError(name, name=name)
encoding = None
if 'b' not in mode:
with open(file_path, 'rb') as file:
encoding = tokenize.detect_encoding(file.readline)[0]
file = open(file_path, mode, encoding=encoding)
return file, file_path, (suffix, mode, type_)
def load_dynamic(name, path, file=None):
loader = machinery.ExtensionFileLoader(name, path)
spec = machinery.ModuleSpec(name=name, loader=loader, origin=path)
return _load(spec)

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"""
Temporary shim module to indirect the bits of distutils we need from setuptools/distutils while providing useful
error messages beyond `No module named 'distutils' on Python >= 3.12, or when setuptools' vendored distutils is broken.
This is a compromise to avoid a hard-dep on setuptools for Python >= 3.12, since many users don't need runtime compilation support from CFFI.
"""
import sys
try:
# import setuptools first; this is the most robust way to ensure its embedded distutils is available
# (the .pth shim should usually work, but this is even more robust)
import setuptools
except Exception as ex:
if sys.version_info >= (3, 12):
# Python 3.12 has no built-in distutils to fall back on, so any import problem is fatal
raise Exception("This CFFI feature requires setuptools on Python >= 3.12. The setuptools module is missing or non-functional.") from ex
# silently ignore on older Pythons (support fallback to stdlib distutils where available)
else:
del setuptools
try:
# bring in just the bits of distutils we need, whether they really came from setuptools or stdlib-embedded distutils
from distutils import log, sysconfig
from distutils.ccompiler import CCompiler
from distutils.command.build_ext import build_ext
from distutils.core import Distribution, Extension
from distutils.dir_util import mkpath
from distutils.errors import DistutilsSetupError, CompileError, LinkError
from distutils.log import set_threshold, set_verbosity
if sys.platform == 'win32':
try:
# FUTURE: msvc9compiler module was removed in setuptools 74; consider removing, as it's only used by an ancient patch in `recompiler`
from distutils.msvc9compiler import MSVCCompiler
except ImportError:
MSVCCompiler = None
except Exception as ex:
if sys.version_info >= (3, 12):
raise Exception("This CFFI feature requires setuptools on Python >= 3.12. Please install the setuptools package.") from ex
# anything older, just let the underlying distutils import error fly
raise Exception("This CFFI feature requires distutils. Please install the distutils or setuptools package.") from ex
del sys

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import sys, types
from .lock import allocate_lock
from .error import CDefError
from . import model
try:
callable
except NameError:
# Python 3.1
from collections import Callable
callable = lambda x: isinstance(x, Callable)
try:
basestring
except NameError:
# Python 3.x
basestring = str
_unspecified = object()
class FFI(object):
r'''
The main top-level class that you instantiate once, or once per module.
Example usage:
ffi = FFI()
ffi.cdef("""
int printf(const char *, ...);
""")
C = ffi.dlopen(None) # standard library
-or-
C = ffi.verify() # use a C compiler: verify the decl above is right
C.printf("hello, %s!\n", ffi.new("char[]", "world"))
'''
def __init__(self, backend=None):
"""Create an FFI instance. The 'backend' argument is used to
select a non-default backend, mostly for tests.
"""
if backend is None:
# You need PyPy (>= 2.0 beta), or a CPython (>= 2.6) with
# _cffi_backend.so compiled.
import _cffi_backend as backend
from . import __version__
if backend.__version__ != __version__:
# bad version! Try to be as explicit as possible.
if hasattr(backend, '__file__'):
# CPython
raise Exception("Version mismatch: this is the 'cffi' package version %s, located in %r. When we import the top-level '_cffi_backend' extension module, we get version %s, located in %r. The two versions should be equal; check your installation." % (
__version__, __file__,
backend.__version__, backend.__file__))
else:
# PyPy
raise Exception("Version mismatch: this is the 'cffi' package version %s, located in %r. This interpreter comes with a built-in '_cffi_backend' module, which is version %s. The two versions should be equal; check your installation." % (
__version__, __file__, backend.__version__))
# (If you insist you can also try to pass the option
# 'backend=backend_ctypes.CTypesBackend()', but don't
# rely on it! It's probably not going to work well.)
from . import cparser
self._backend = backend
self._lock = allocate_lock()
self._parser = cparser.Parser()
self._cached_btypes = {}
self._parsed_types = types.ModuleType('parsed_types').__dict__
self._new_types = types.ModuleType('new_types').__dict__
self._function_caches = []
self._libraries = []
self._cdefsources = []
self._included_ffis = []
self._windows_unicode = None
self._init_once_cache = {}
self._cdef_version = None
self._embedding = None
self._typecache = model.get_typecache(backend)
if hasattr(backend, 'set_ffi'):
backend.set_ffi(self)
for name in list(backend.__dict__):
if name.startswith('RTLD_'):
setattr(self, name, getattr(backend, name))
#
with self._lock:
self.BVoidP = self._get_cached_btype(model.voidp_type)
self.BCharA = self._get_cached_btype(model.char_array_type)
if isinstance(backend, types.ModuleType):
# _cffi_backend: attach these constants to the class
if not hasattr(FFI, 'NULL'):
FFI.NULL = self.cast(self.BVoidP, 0)
FFI.CData, FFI.CType = backend._get_types()
else:
# ctypes backend: attach these constants to the instance
self.NULL = self.cast(self.BVoidP, 0)
self.CData, self.CType = backend._get_types()
self.buffer = backend.buffer
def cdef(self, csource, override=False, packed=False, pack=None):
"""Parse the given C source. This registers all declared functions,
types, and global variables. The functions and global variables can
then be accessed via either 'ffi.dlopen()' or 'ffi.verify()'.
The types can be used in 'ffi.new()' and other functions.
If 'packed' is specified as True, all structs declared inside this
cdef are packed, i.e. laid out without any field alignment at all.
Alternatively, 'pack' can be a small integer, and requests for
alignment greater than that are ignored (pack=1 is equivalent to
packed=True).
"""
self._cdef(csource, override=override, packed=packed, pack=pack)
def embedding_api(self, csource, packed=False, pack=None):
self._cdef(csource, packed=packed, pack=pack, dllexport=True)
if self._embedding is None:
self._embedding = ''
def _cdef(self, csource, override=False, **options):
if not isinstance(csource, str): # unicode, on Python 2
if not isinstance(csource, basestring):
raise TypeError("cdef() argument must be a string")
csource = csource.encode('ascii')
with self._lock:
self._cdef_version = object()
self._parser.parse(csource, override=override, **options)
self._cdefsources.append(csource)
if override:
for cache in self._function_caches:
cache.clear()
finishlist = self._parser._recomplete
if finishlist:
self._parser._recomplete = []
for tp in finishlist:
tp.finish_backend_type(self, finishlist)
def dlopen(self, name, flags=0):
"""Load and return a dynamic library identified by 'name'.
The standard C library can be loaded by passing None.
Note that functions and types declared by 'ffi.cdef()' are not
linked to a particular library, just like C headers; in the
library we only look for the actual (untyped) symbols.
"""
if not (isinstance(name, basestring) or
name is None or
isinstance(name, self.CData)):
raise TypeError("dlopen(name): name must be a file name, None, "
"or an already-opened 'void *' handle")
with self._lock:
lib, function_cache = _make_ffi_library(self, name, flags)
self._function_caches.append(function_cache)
self._libraries.append(lib)
return lib
def dlclose(self, lib):
"""Close a library obtained with ffi.dlopen(). After this call,
access to functions or variables from the library will fail
(possibly with a segmentation fault).
"""
type(lib).__cffi_close__(lib)
def _typeof_locked(self, cdecl):
# call me with the lock!
key = cdecl
if key in self._parsed_types:
return self._parsed_types[key]
#
if not isinstance(cdecl, str): # unicode, on Python 2
cdecl = cdecl.encode('ascii')
#
type = self._parser.parse_type(cdecl)
really_a_function_type = type.is_raw_function
if really_a_function_type:
type = type.as_function_pointer()
btype = self._get_cached_btype(type)
result = btype, really_a_function_type
self._parsed_types[key] = result
return result
def _typeof(self, cdecl, consider_function_as_funcptr=False):
# string -> ctype object
try:
result = self._parsed_types[cdecl]
except KeyError:
with self._lock:
result = self._typeof_locked(cdecl)
#
btype, really_a_function_type = result
if really_a_function_type and not consider_function_as_funcptr:
raise CDefError("the type %r is a function type, not a "
"pointer-to-function type" % (cdecl,))
return btype
def typeof(self, cdecl):
"""Parse the C type given as a string and return the
corresponding <ctype> object.
It can also be used on 'cdata' instance to get its C type.
"""
if isinstance(cdecl, basestring):
return self._typeof(cdecl)
if isinstance(cdecl, self.CData):
return self._backend.typeof(cdecl)
if isinstance(cdecl, types.BuiltinFunctionType):
res = _builtin_function_type(cdecl)
if res is not None:
return res
if (isinstance(cdecl, types.FunctionType)
and hasattr(cdecl, '_cffi_base_type')):
with self._lock:
return self._get_cached_btype(cdecl._cffi_base_type)
raise TypeError(type(cdecl))
def sizeof(self, cdecl):
"""Return the size in bytes of the argument. It can be a
string naming a C type, or a 'cdata' instance.
"""
if isinstance(cdecl, basestring):
BType = self._typeof(cdecl)
return self._backend.sizeof(BType)
else:
return self._backend.sizeof(cdecl)
def alignof(self, cdecl):
"""Return the natural alignment size in bytes of the C type
given as a string.
"""
if isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl)
return self._backend.alignof(cdecl)
def offsetof(self, cdecl, *fields_or_indexes):
"""Return the offset of the named field inside the given
structure or array, which must be given as a C type name.
You can give several field names in case of nested structures.
You can also give numeric values which correspond to array
items, in case of an array type.
"""
if isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl)
return self._typeoffsetof(cdecl, *fields_or_indexes)[1]
def new(self, cdecl, init=None):
"""Allocate an instance according to the specified C type and
return a pointer to it. The specified C type must be either a
pointer or an array: ``new('X *')`` allocates an X and returns
a pointer to it, whereas ``new('X[n]')`` allocates an array of
n X'es and returns an array referencing it (which works
mostly like a pointer, like in C). You can also use
``new('X[]', n)`` to allocate an array of a non-constant
length n.
The memory is initialized following the rules of declaring a
global variable in C: by default it is zero-initialized, but
an explicit initializer can be given which can be used to
fill all or part of the memory.
When the returned <cdata> object goes out of scope, the memory
is freed. In other words the returned <cdata> object has
ownership of the value of type 'cdecl' that it points to. This
means that the raw data can be used as long as this object is
kept alive, but must not be used for a longer time. Be careful
about that when copying the pointer to the memory somewhere
else, e.g. into another structure.
"""
if isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl)
return self._backend.newp(cdecl, init)
def new_allocator(self, alloc=None, free=None,
should_clear_after_alloc=True):
"""Return a new allocator, i.e. a function that behaves like ffi.new()
but uses the provided low-level 'alloc' and 'free' functions.
'alloc' is called with the size as argument. If it returns NULL, a
MemoryError is raised. 'free' is called with the result of 'alloc'
as argument. Both can be either Python function or directly C
functions. If 'free' is None, then no free function is called.
If both 'alloc' and 'free' are None, the default is used.
If 'should_clear_after_alloc' is set to False, then the memory
returned by 'alloc' is assumed to be already cleared (or you are
fine with garbage); otherwise CFFI will clear it.
"""
compiled_ffi = self._backend.FFI()
allocator = compiled_ffi.new_allocator(alloc, free,
should_clear_after_alloc)
def allocate(cdecl, init=None):
if isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl)
return allocator(cdecl, init)
return allocate
def cast(self, cdecl, source):
"""Similar to a C cast: returns an instance of the named C
type initialized with the given 'source'. The source is
casted between integers or pointers of any type.
"""
if isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl)
return self._backend.cast(cdecl, source)
def string(self, cdata, maxlen=-1):
"""Return a Python string (or unicode string) from the 'cdata'.
If 'cdata' is a pointer or array of characters or bytes, returns
the null-terminated string. The returned string extends until
the first null character, or at most 'maxlen' characters. If
'cdata' is an array then 'maxlen' defaults to its length.
If 'cdata' is a pointer or array of wchar_t, returns a unicode
string following the same rules.
If 'cdata' is a single character or byte or a wchar_t, returns
it as a string or unicode string.
If 'cdata' is an enum, returns the value of the enumerator as a
string, or 'NUMBER' if the value is out of range.
"""
return self._backend.string(cdata, maxlen)
def unpack(self, cdata, length):
"""Unpack an array of C data of the given length,
returning a Python string/unicode/list.
If 'cdata' is a pointer to 'char', returns a byte string.
It does not stop at the first null. This is equivalent to:
ffi.buffer(cdata, length)[:]
If 'cdata' is a pointer to 'wchar_t', returns a unicode string.
'length' is measured in wchar_t's; it is not the size in bytes.
If 'cdata' is a pointer to anything else, returns a list of
'length' items. This is a faster equivalent to:
[cdata[i] for i in range(length)]
"""
return self._backend.unpack(cdata, length)
#def buffer(self, cdata, size=-1):
# """Return a read-write buffer object that references the raw C data
# pointed to by the given 'cdata'. The 'cdata' must be a pointer or
# an array. Can be passed to functions expecting a buffer, or directly
# manipulated with:
#
# buf[:] get a copy of it in a regular string, or
# buf[idx] as a single character
# buf[:] = ...
# buf[idx] = ... change the content
# """
# note that 'buffer' is a type, set on this instance by __init__
def from_buffer(self, cdecl, python_buffer=_unspecified,
require_writable=False):
"""Return a cdata of the given type pointing to the data of the
given Python object, which must support the buffer interface.
Note that this is not meant to be used on the built-in types
str or unicode (you can build 'char[]' arrays explicitly)
but only on objects containing large quantities of raw data
in some other format, like 'array.array' or numpy arrays.
The first argument is optional and default to 'char[]'.
"""
if python_buffer is _unspecified:
cdecl, python_buffer = self.BCharA, cdecl
elif isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl)
return self._backend.from_buffer(cdecl, python_buffer,
require_writable)
def memmove(self, dest, src, n):
"""ffi.memmove(dest, src, n) copies n bytes of memory from src to dest.
Like the C function memmove(), the memory areas may overlap;
apart from that it behaves like the C function memcpy().
'src' can be any cdata ptr or array, or any Python buffer object.
'dest' can be any cdata ptr or array, or a writable Python buffer
object. The size to copy, 'n', is always measured in bytes.
Unlike other methods, this one supports all Python buffer including
byte strings and bytearrays---but it still does not support
non-contiguous buffers.
"""
return self._backend.memmove(dest, src, n)
def callback(self, cdecl, python_callable=None, error=None, onerror=None):
"""Return a callback object or a decorator making such a
callback object. 'cdecl' must name a C function pointer type.
The callback invokes the specified 'python_callable' (which may
be provided either directly or via a decorator). Important: the
callback object must be manually kept alive for as long as the
callback may be invoked from the C level.
"""
def callback_decorator_wrap(python_callable):
if not callable(python_callable):
raise TypeError("the 'python_callable' argument "
"is not callable")
return self._backend.callback(cdecl, python_callable,
error, onerror)
if isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl, consider_function_as_funcptr=True)
if python_callable is None:
return callback_decorator_wrap # decorator mode
else:
return callback_decorator_wrap(python_callable) # direct mode
def getctype(self, cdecl, replace_with=''):
"""Return a string giving the C type 'cdecl', which may be itself
a string or a <ctype> object. If 'replace_with' is given, it gives
extra text to append (or insert for more complicated C types), like
a variable name, or '*' to get actually the C type 'pointer-to-cdecl'.
"""
if isinstance(cdecl, basestring):
cdecl = self._typeof(cdecl)
replace_with = replace_with.strip()
if (replace_with.startswith('*')
and '&[' in self._backend.getcname(cdecl, '&')):
replace_with = '(%s)' % replace_with
elif replace_with and not replace_with[0] in '[(':
replace_with = ' ' + replace_with
return self._backend.getcname(cdecl, replace_with)
def gc(self, cdata, destructor, size=0):
"""Return a new cdata object that points to the same
data. Later, when this new cdata object is garbage-collected,
'destructor(old_cdata_object)' will be called.
The optional 'size' gives an estimate of the size, used to
trigger the garbage collection more eagerly. So far only used
on PyPy. It tells the GC that the returned object keeps alive
roughly 'size' bytes of external memory.
"""
return self._backend.gcp(cdata, destructor, size)
def _get_cached_btype(self, type):
assert self._lock.acquire(False) is False
# call me with the lock!
try:
BType = self._cached_btypes[type]
except KeyError:
finishlist = []
BType = type.get_cached_btype(self, finishlist)
for type in finishlist:
type.finish_backend_type(self, finishlist)
return BType
def verify(self, source='', tmpdir=None, **kwargs):
"""Verify that the current ffi signatures compile on this
machine, and return a dynamic library object. The dynamic
library can be used to call functions and access global
variables declared in this 'ffi'. The library is compiled
by the C compiler: it gives you C-level API compatibility
(including calling macros). This is unlike 'ffi.dlopen()',
which requires binary compatibility in the signatures.
"""
from .verifier import Verifier, _caller_dir_pycache
#
# If set_unicode(True) was called, insert the UNICODE and
# _UNICODE macro declarations
if self._windows_unicode:
self._apply_windows_unicode(kwargs)
#
# Set the tmpdir here, and not in Verifier.__init__: it picks
# up the caller's directory, which we want to be the caller of
# ffi.verify(), as opposed to the caller of Veritier().
tmpdir = tmpdir or _caller_dir_pycache()
#
# Make a Verifier() and use it to load the library.
self.verifier = Verifier(self, source, tmpdir, **kwargs)
lib = self.verifier.load_library()
#
# Save the loaded library for keep-alive purposes, even
# if the caller doesn't keep it alive itself (it should).
self._libraries.append(lib)
return lib
def _get_errno(self):
return self._backend.get_errno()
def _set_errno(self, errno):
self._backend.set_errno(errno)
errno = property(_get_errno, _set_errno, None,
"the value of 'errno' from/to the C calls")
def getwinerror(self, code=-1):
return self._backend.getwinerror(code)
def _pointer_to(self, ctype):
with self._lock:
return model.pointer_cache(self, ctype)
def addressof(self, cdata, *fields_or_indexes):
"""Return the address of a <cdata 'struct-or-union'>.
If 'fields_or_indexes' are given, returns the address of that
field or array item in the structure or array, recursively in
case of nested structures.
"""
try:
ctype = self._backend.typeof(cdata)
except TypeError:
if '__addressof__' in type(cdata).__dict__:
return type(cdata).__addressof__(cdata, *fields_or_indexes)
raise
if fields_or_indexes:
ctype, offset = self._typeoffsetof(ctype, *fields_or_indexes)
else:
if ctype.kind == "pointer":
raise TypeError("addressof(pointer)")
offset = 0
ctypeptr = self._pointer_to(ctype)
return self._backend.rawaddressof(ctypeptr, cdata, offset)
def _typeoffsetof(self, ctype, field_or_index, *fields_or_indexes):
ctype, offset = self._backend.typeoffsetof(ctype, field_or_index)
for field1 in fields_or_indexes:
ctype, offset1 = self._backend.typeoffsetof(ctype, field1, 1)
offset += offset1
return ctype, offset
def include(self, ffi_to_include):
"""Includes the typedefs, structs, unions and enums defined
in another FFI instance. Usage is similar to a #include in C,
where a part of the program might include types defined in
another part for its own usage. Note that the include()
method has no effect on functions, constants and global
variables, which must anyway be accessed directly from the
lib object returned by the original FFI instance.
"""
if not isinstance(ffi_to_include, FFI):
raise TypeError("ffi.include() expects an argument that is also of"
" type cffi.FFI, not %r" % (
type(ffi_to_include).__name__,))
if ffi_to_include is self:
raise ValueError("self.include(self)")
with ffi_to_include._lock:
with self._lock:
self._parser.include(ffi_to_include._parser)
self._cdefsources.append('[')
self._cdefsources.extend(ffi_to_include._cdefsources)
self._cdefsources.append(']')
self._included_ffis.append(ffi_to_include)
def new_handle(self, x):
return self._backend.newp_handle(self.BVoidP, x)
def from_handle(self, x):
return self._backend.from_handle(x)
def release(self, x):
self._backend.release(x)
def set_unicode(self, enabled_flag):
"""Windows: if 'enabled_flag' is True, enable the UNICODE and
_UNICODE defines in C, and declare the types like TCHAR and LPTCSTR
to be (pointers to) wchar_t. If 'enabled_flag' is False,
declare these types to be (pointers to) plain 8-bit characters.
This is mostly for backward compatibility; you usually want True.
"""
if self._windows_unicode is not None:
raise ValueError("set_unicode() can only be called once")
enabled_flag = bool(enabled_flag)
if enabled_flag:
self.cdef("typedef wchar_t TBYTE;"
"typedef wchar_t TCHAR;"
"typedef const wchar_t *LPCTSTR;"
"typedef const wchar_t *PCTSTR;"
"typedef wchar_t *LPTSTR;"
"typedef wchar_t *PTSTR;"
"typedef TBYTE *PTBYTE;"
"typedef TCHAR *PTCHAR;")
else:
self.cdef("typedef char TBYTE;"
"typedef char TCHAR;"
"typedef const char *LPCTSTR;"
"typedef const char *PCTSTR;"
"typedef char *LPTSTR;"
"typedef char *PTSTR;"
"typedef TBYTE *PTBYTE;"
"typedef TCHAR *PTCHAR;")
self._windows_unicode = enabled_flag
def _apply_windows_unicode(self, kwds):
defmacros = kwds.get('define_macros', ())
if not isinstance(defmacros, (list, tuple)):
raise TypeError("'define_macros' must be a list or tuple")
defmacros = list(defmacros) + [('UNICODE', '1'),
('_UNICODE', '1')]
kwds['define_macros'] = defmacros
def _apply_embedding_fix(self, kwds):
# must include an argument like "-lpython2.7" for the compiler
def ensure(key, value):
lst = kwds.setdefault(key, [])
if value not in lst:
lst.append(value)
#
if '__pypy__' in sys.builtin_module_names:
import os
if sys.platform == "win32":
# we need 'libpypy-c.lib'. Current distributions of
# pypy (>= 4.1) contain it as 'libs/python27.lib'.
pythonlib = "python{0[0]}{0[1]}".format(sys.version_info)
if hasattr(sys, 'prefix'):
ensure('library_dirs', os.path.join(sys.prefix, 'libs'))
else:
# we need 'libpypy-c.{so,dylib}', which should be by
# default located in 'sys.prefix/bin' for installed
# systems.
if sys.version_info < (3,):
pythonlib = "pypy-c"
else:
pythonlib = "pypy3-c"
if hasattr(sys, 'prefix'):
ensure('library_dirs', os.path.join(sys.prefix, 'bin'))
# On uninstalled pypy's, the libpypy-c is typically found in
# .../pypy/goal/.
if hasattr(sys, 'prefix'):
ensure('library_dirs', os.path.join(sys.prefix, 'pypy', 'goal'))
else:
if sys.platform == "win32":
template = "python%d%d"
if hasattr(sys, 'gettotalrefcount'):
template += '_d'
else:
try:
import sysconfig
except ImportError: # 2.6
from cffi._shimmed_dist_utils import sysconfig
template = "python%d.%d"
if sysconfig.get_config_var('DEBUG_EXT'):
template += sysconfig.get_config_var('DEBUG_EXT')
pythonlib = (template %
(sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
if hasattr(sys, 'abiflags'):
pythonlib += sys.abiflags
ensure('libraries', pythonlib)
if sys.platform == "win32":
ensure('extra_link_args', '/MANIFEST')
def set_source(self, module_name, source, source_extension='.c', **kwds):
import os
if hasattr(self, '_assigned_source'):
raise ValueError("set_source() cannot be called several times "
"per ffi object")
if not isinstance(module_name, basestring):
raise TypeError("'module_name' must be a string")
if os.sep in module_name or (os.altsep and os.altsep in module_name):
raise ValueError("'module_name' must not contain '/': use a dotted "
"name to make a 'package.module' location")
self._assigned_source = (str(module_name), source,
source_extension, kwds)
def set_source_pkgconfig(self, module_name, pkgconfig_libs, source,
source_extension='.c', **kwds):
from . import pkgconfig
if not isinstance(pkgconfig_libs, list):
raise TypeError("the pkgconfig_libs argument must be a list "
"of package names")
kwds2 = pkgconfig.flags_from_pkgconfig(pkgconfig_libs)
pkgconfig.merge_flags(kwds, kwds2)
self.set_source(module_name, source, source_extension, **kwds)
def distutils_extension(self, tmpdir='build', verbose=True):
from cffi._shimmed_dist_utils import mkpath
from .recompiler import recompile
#
if not hasattr(self, '_assigned_source'):
if hasattr(self, 'verifier'): # fallback, 'tmpdir' ignored
return self.verifier.get_extension()
raise ValueError("set_source() must be called before"
" distutils_extension()")
module_name, source, source_extension, kwds = self._assigned_source
if source is None:
raise TypeError("distutils_extension() is only for C extension "
"modules, not for dlopen()-style pure Python "
"modules")
mkpath(tmpdir)
ext, updated = recompile(self, module_name,
source, tmpdir=tmpdir, extradir=tmpdir,
source_extension=source_extension,
call_c_compiler=False, **kwds)
if verbose:
if updated:
sys.stderr.write("regenerated: %r\n" % (ext.sources[0],))
else:
sys.stderr.write("not modified: %r\n" % (ext.sources[0],))
return ext
def emit_c_code(self, filename):
from .recompiler import recompile
#
if not hasattr(self, '_assigned_source'):
raise ValueError("set_source() must be called before emit_c_code()")
module_name, source, source_extension, kwds = self._assigned_source
if source is None:
raise TypeError("emit_c_code() is only for C extension modules, "
"not for dlopen()-style pure Python modules")
recompile(self, module_name, source,
c_file=filename, call_c_compiler=False,
uses_ffiplatform=False, **kwds)
def emit_python_code(self, filename):
from .recompiler import recompile
#
if not hasattr(self, '_assigned_source'):
raise ValueError("set_source() must be called before emit_c_code()")
module_name, source, source_extension, kwds = self._assigned_source
if source is not None:
raise TypeError("emit_python_code() is only for dlopen()-style "
"pure Python modules, not for C extension modules")
recompile(self, module_name, source,
c_file=filename, call_c_compiler=False,
uses_ffiplatform=False, **kwds)
def compile(self, tmpdir='.', verbose=0, target=None, debug=None):
"""The 'target' argument gives the final file name of the
compiled DLL. Use '*' to force distutils' choice, suitable for
regular CPython C API modules. Use a file name ending in '.*'
to ask for the system's default extension for dynamic libraries
(.so/.dll/.dylib).
The default is '*' when building a non-embedded C API extension,
and (module_name + '.*') when building an embedded library.
"""
from .recompiler import recompile
#
if not hasattr(self, '_assigned_source'):
raise ValueError("set_source() must be called before compile()")
module_name, source, source_extension, kwds = self._assigned_source
return recompile(self, module_name, source, tmpdir=tmpdir,
target=target, source_extension=source_extension,
compiler_verbose=verbose, debug=debug, **kwds)
def init_once(self, func, tag):
# Read _init_once_cache[tag], which is either (False, lock) if
# we're calling the function now in some thread, or (True, result).
# Don't call setdefault() in most cases, to avoid allocating and
# immediately freeing a lock; but still use setdefaut() to avoid
# races.
try:
x = self._init_once_cache[tag]
except KeyError:
x = self._init_once_cache.setdefault(tag, (False, allocate_lock()))
# Common case: we got (True, result), so we return the result.
if x[0]:
return x[1]
# Else, it's a lock. Acquire it to serialize the following tests.
with x[1]:
# Read again from _init_once_cache the current status.
x = self._init_once_cache[tag]
if x[0]:
return x[1]
# Call the function and store the result back.
result = func()
self._init_once_cache[tag] = (True, result)
return result
def embedding_init_code(self, pysource):
if self._embedding:
raise ValueError("embedding_init_code() can only be called once")
# fix 'pysource' before it gets dumped into the C file:
# - remove empty lines at the beginning, so it starts at "line 1"
# - dedent, if all non-empty lines are indented
# - check for SyntaxErrors
import re
match = re.match(r'\s*\n', pysource)
if match:
pysource = pysource[match.end():]
lines = pysource.splitlines() or ['']
prefix = re.match(r'\s*', lines[0]).group()
for i in range(1, len(lines)):
line = lines[i]
if line.rstrip():
while not line.startswith(prefix):
prefix = prefix[:-1]
i = len(prefix)
lines = [line[i:]+'\n' for line in lines]
pysource = ''.join(lines)
#
compile(pysource, "cffi_init", "exec")
#
self._embedding = pysource
def def_extern(self, *args, **kwds):
raise ValueError("ffi.def_extern() is only available on API-mode FFI "
"objects")
def list_types(self):
"""Returns the user type names known to this FFI instance.
This returns a tuple containing three lists of names:
(typedef_names, names_of_structs, names_of_unions)
"""
typedefs = []
structs = []
unions = []
for key in self._parser._declarations:
if key.startswith('typedef '):
typedefs.append(key[8:])
elif key.startswith('struct '):
structs.append(key[7:])
elif key.startswith('union '):
unions.append(key[6:])
typedefs.sort()
structs.sort()
unions.sort()
return (typedefs, structs, unions)
def _load_backend_lib(backend, name, flags):
import os
if not isinstance(name, basestring):
if sys.platform != "win32" or name is not None:
return backend.load_library(name, flags)
name = "c" # Windows: load_library(None) fails, but this works
# on Python 2 (backward compatibility hack only)
first_error = None
if '.' in name or '/' in name or os.sep in name:
try:
return backend.load_library(name, flags)
except OSError as e:
first_error = e
import ctypes.util
path = ctypes.util.find_library(name)
if path is None:
if name == "c" and sys.platform == "win32" and sys.version_info >= (3,):
raise OSError("dlopen(None) cannot work on Windows for Python 3 "
"(see http://bugs.python.org/issue23606)")
msg = ("ctypes.util.find_library() did not manage "
"to locate a library called %r" % (name,))
if first_error is not None:
msg = "%s. Additionally, %s" % (first_error, msg)
raise OSError(msg)
return backend.load_library(path, flags)
def _make_ffi_library(ffi, libname, flags):
backend = ffi._backend
backendlib = _load_backend_lib(backend, libname, flags)
#
def accessor_function(name):
key = 'function ' + name
tp, _ = ffi._parser._declarations[key]
BType = ffi._get_cached_btype(tp)
value = backendlib.load_function(BType, name)
library.__dict__[name] = value
#
def accessor_variable(name):
key = 'variable ' + name
tp, _ = ffi._parser._declarations[key]
BType = ffi._get_cached_btype(tp)
read_variable = backendlib.read_variable
write_variable = backendlib.write_variable
setattr(FFILibrary, name, property(
lambda self: read_variable(BType, name),
lambda self, value: write_variable(BType, name, value)))
#
def addressof_var(name):
try:
return addr_variables[name]
except KeyError:
with ffi._lock:
if name not in addr_variables:
key = 'variable ' + name
tp, _ = ffi._parser._declarations[key]
BType = ffi._get_cached_btype(tp)
if BType.kind != 'array':
BType = model.pointer_cache(ffi, BType)
p = backendlib.load_function(BType, name)
addr_variables[name] = p
return addr_variables[name]
#
def accessor_constant(name):
raise NotImplementedError("non-integer constant '%s' cannot be "
"accessed from a dlopen() library" % (name,))
#
def accessor_int_constant(name):
library.__dict__[name] = ffi._parser._int_constants[name]
#
accessors = {}
accessors_version = [False]
addr_variables = {}
#
def update_accessors():
if accessors_version[0] is ffi._cdef_version:
return
#
for key, (tp, _) in ffi._parser._declarations.items():
if not isinstance(tp, model.EnumType):
tag, name = key.split(' ', 1)
if tag == 'function':
accessors[name] = accessor_function
elif tag == 'variable':
accessors[name] = accessor_variable
elif tag == 'constant':
accessors[name] = accessor_constant
else:
for i, enumname in enumerate(tp.enumerators):
def accessor_enum(name, tp=tp, i=i):
tp.check_not_partial()
library.__dict__[name] = tp.enumvalues[i]
accessors[enumname] = accessor_enum
for name in ffi._parser._int_constants:
accessors.setdefault(name, accessor_int_constant)
accessors_version[0] = ffi._cdef_version
#
def make_accessor(name):
with ffi._lock:
if name in library.__dict__ or name in FFILibrary.__dict__:
return # added by another thread while waiting for the lock
if name not in accessors:
update_accessors()
if name not in accessors:
raise AttributeError(name)
accessors[name](name)
#
class FFILibrary(object):
def __getattr__(self, name):
make_accessor(name)
return getattr(self, name)
def __setattr__(self, name, value):
try:
property = getattr(self.__class__, name)
except AttributeError:
make_accessor(name)
setattr(self, name, value)
else:
property.__set__(self, value)
def __dir__(self):
with ffi._lock:
update_accessors()
return accessors.keys()
def __addressof__(self, name):
if name in library.__dict__:
return library.__dict__[name]
if name in FFILibrary.__dict__:
return addressof_var(name)
make_accessor(name)
if name in library.__dict__:
return library.__dict__[name]
if name in FFILibrary.__dict__:
return addressof_var(name)
raise AttributeError("cffi library has no function or "
"global variable named '%s'" % (name,))
def __cffi_close__(self):
backendlib.close_lib()
self.__dict__.clear()
#
if isinstance(libname, basestring):
try:
if not isinstance(libname, str): # unicode, on Python 2
libname = libname.encode('utf-8')
FFILibrary.__name__ = 'FFILibrary_%s' % libname
except UnicodeError:
pass
library = FFILibrary()
return library, library.__dict__
def _builtin_function_type(func):
# a hack to make at least ffi.typeof(builtin_function) work,
# if the builtin function was obtained by 'vengine_cpy'.
import sys
try:
module = sys.modules[func.__module__]
ffi = module._cffi_original_ffi
types_of_builtin_funcs = module._cffi_types_of_builtin_funcs
tp = types_of_builtin_funcs[func]
except (KeyError, AttributeError, TypeError):
return None
else:
with ffi._lock:
return ffi._get_cached_btype(tp)

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