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vlc.py
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vlc.py
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#! /usr/bin/python
# Python ctypes bindings for VLC
#
# Copyright (C) 2009-2012 the VideoLAN team
# $Id: $
#
# Authors: Olivier Aubert <olivier.aubert at liris.cnrs.fr>
# Jean Brouwers <MrJean1 at gmail.com>
# Geoff Salmon <geoff.salmon at gmail.com>
#
# This library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
"""This module provides bindings for the LibVLC public API, see
U{http://wiki.videolan.org/LibVLC}.
You can find the documentation and a README file with some examples
at U{http://www.advene.org/download/python-ctypes/}.
Basically, the most important class is L{Instance}, which is used
to create a libvlc instance. From this instance, you then create
L{MediaPlayer} and L{MediaListPlayer} instances.
Alternatively, you may create instances of the L{MediaPlayer} and
L{MediaListPlayer} class directly and an instance of L{Instance}
will be implicitly created. The latter can be obtained using the
C{get_instance} method of L{MediaPlayer} and L{MediaListPlayer}.
"""
import ctypes
from ctypes.util import find_library
import os
import sys
# Used by EventManager in override.py
from inspect import getargspec
__version__ = "N/A"
build_date = "Tue Jul 2 10:35:53 2013"
if sys.version_info[0] > 2:
str = str
unicode = str
bytes = bytes
basestring = (str, bytes)
PYTHON3 = True
def str_to_bytes(s):
"""Translate string or bytes to bytes.
"""
if isinstance(s, str):
return bytes(s, sys.getfilesystemencoding())
else:
return s
def bytes_to_str(b):
"""Translate bytes to string.
"""
if isinstance(b, bytes):
return b.decode(sys.getfilesystemencoding())
else:
return b
else:
str = str
unicode = unicode
bytes = str
basestring = basestring
PYTHON3 = False
def str_to_bytes(s):
"""Translate string or bytes to bytes.
"""
if isinstance(s, unicode):
return s.encode(sys.getfilesystemencoding())
else:
return s
def bytes_to_str(b):
"""Translate bytes to unicode string.
"""
if isinstance(b, str):
return unicode(b, sys.getfilesystemencoding())
else:
return b
# Internal guard to prevent internal classes to be directly
# instanciated.
_internal_guard = object()
def find_lib():
dll = None
plugin_path = None
if sys.platform.startswith('linux'):
p = find_library('vlc')
try:
dll = ctypes.CDLL(p)
except OSError: # may fail
dll = ctypes.CDLL('libvlc.so.5')
elif sys.platform.startswith('win'):
p = find_library('libvlc.dll')
if p is None:
try: # some registry settings
import _winreg as w # leaner than win32api, win32con
for r in w.HKEY_LOCAL_MACHINE, w.HKEY_CURRENT_USER:
try:
r = w.OpenKey(r, 'Software\\VideoLAN\\VLC')
plugin_path, _ = w.QueryValueEx(r, 'InstallDir')
w.CloseKey(r)
break
except w.error:
pass
except ImportError: # no PyWin32
pass
if plugin_path is None:
# try some standard locations.
for p in ('Program Files\\VideoLan\\', 'VideoLan\\',
'Program Files\\', ''):
p = 'C:\\' + p + 'VLC\\libvlc.dll'
if os.path.exists(p):
plugin_path = os.path.dirname(p)
break
if plugin_path is not None: # try loading
p = os.getcwd()
os.chdir(plugin_path)
# if chdir failed, this will raise an exception
dll = ctypes.CDLL('libvlc.dll')
# restore cwd after dll has been loaded
os.chdir(p)
else: # may fail
dll = ctypes.CDLL('libvlc.dll')
else:
plugin_path = os.path.dirname(p)
dll = ctypes.CDLL(p)
elif sys.platform.startswith('darwin'):
# FIXME: should find a means to configure path
d = '/Applications/VLC.app/Contents/MacOS/'
p = d + 'lib/libvlc.dylib'
if os.path.exists(p):
dll = ctypes.CDLL(p)
d += 'modules'
if os.path.isdir(d):
plugin_path = d
else: # hope, some PATH is set...
dll = ctypes.CDLL('libvlc.dylib')
else:
raise NotImplementedError('%s: %s not supported' % (sys.argv[0], sys.platform))
return (dll, plugin_path)
# plugin_path used on win32 and MacOS in override.py
dll, plugin_path = find_lib()
class VLCException(Exception):
"""Exception raised by libvlc methods.
"""
pass
try:
_Ints = (int, long)
except NameError: # no long in Python 3+
_Ints = int
_Seqs = (list, tuple)
# Default instance. It is used to instanciate classes directly in the
# OO-wrapper.
_default_instance = None
def get_default_instance():
"""Return the default VLC.Instance.
"""
global _default_instance
if _default_instance is None:
_default_instance = Instance()
return _default_instance
_Cfunctions = {} # from LibVLC __version__
_Globals = globals() # sys.modules[__name__].__dict__
def _Cfunction(name, flags, errcheck, *types):
"""(INTERNAL) New ctypes function binding.
"""
if hasattr(dll, name) and name in _Globals:
p = ctypes.CFUNCTYPE(*types)
f = p((name, dll), flags)
if errcheck is not None:
f.errcheck = errcheck
# replace the Python function
# in this module, but only when
# running as python -O or -OO
if __debug__:
_Cfunctions[name] = f
else:
_Globals[name] = f
return f
raise NameError('no function %r' % (name,))
def _Cobject(cls, ctype):
"""(INTERNAL) New instance from ctypes.
"""
o = object.__new__(cls)
o._as_parameter_ = ctype
return o
def _Constructor(cls, ptr=_internal_guard):
"""(INTERNAL) New wrapper from ctypes.
"""
if ptr == _internal_guard:
raise VLCException("(INTERNAL) ctypes class. You should get references for this class through methods of the LibVLC API.")
if ptr is None or ptr == 0:
return None
return _Cobject(cls, ctypes.c_void_p(ptr))
class _Cstruct(ctypes.Structure):
"""(INTERNAL) Base class for ctypes structures.
"""
_fields_ = [] # list of 2-tuples ('name', ctyptes.<type>)
def __str__(self):
l = [' %s:\t%s' % (n, getattr(self, n)) for n, _ in self._fields_]
return '\n'.join([self.__class__.__name__] + l)
def __repr__(self):
return '%s.%s' % (self.__class__.__module__, self)
class _Ctype(object):
"""(INTERNAL) Base class for ctypes.
"""
@staticmethod
def from_param(this): # not self
"""(INTERNAL) ctypes parameter conversion method.
"""
if this is None:
return None
return this._as_parameter_
class ListPOINTER(object):
"""Just like a POINTER but accept a list of ctype as an argument.
"""
def __init__(self, etype):
self.etype = etype
def from_param(self, param):
if isinstance(param, _Seqs):
return (self.etype * len(param))(*param)
# errcheck functions for some native functions.
def string_result(result, func, arguments):
"""Errcheck function. Returns a string and frees the original pointer.
It assumes the result is a char *.
"""
if result:
# make a python string copy
s = bytes_to_str(ctypes.string_at(result))
# free original string ptr
libvlc_free(result)
return s
return None
def class_result(classname):
"""Errcheck function. Returns a function that creates the specified class.
"""
def wrap_errcheck(result, func, arguments):
if result is None:
return None
return classname(result)
return wrap_errcheck
# Wrapper for the opaque struct libvlc_log_t
class Log(ctypes.Structure):
pass
Log_ptr = ctypes.POINTER(Log)
# FILE* ctypes wrapper, copied from
# http://svn.python.org/projects/ctypes/trunk/ctypeslib/ctypeslib/contrib/pythonhdr.py
class FILE(ctypes.Structure):
pass
FILE_ptr = ctypes.POINTER(FILE)
if PYTHON3:
PyFile_FromFd = ctypes.pythonapi.PyFile_FromFd
PyFile_FromFd.restype = ctypes.py_object
PyFile_FromFd.argtypes = [ctypes.c_int,
ctypes.c_char_p,
ctypes.c_char_p,
ctypes.c_int,
ctypes.c_char_p,
ctypes.c_char_p,
ctypes.c_char_p,
ctypes.c_int ]
PyFile_AsFd = ctypes.pythonapi.PyObject_AsFileDescriptor
PyFile_AsFd.restype = ctypes.c_int
PyFile_AsFd.argtypes = [ctypes.py_object]
else:
PyFile_FromFile = ctypes.pythonapi.PyFile_FromFile
PyFile_FromFile.restype = ctypes.py_object
PyFile_FromFile.argtypes = [FILE_ptr,
ctypes.c_char_p,
ctypes.c_char_p,
ctypes.CFUNCTYPE(ctypes.c_int, FILE_ptr)]
PyFile_AsFile = ctypes.pythonapi.PyFile_AsFile
PyFile_AsFile.restype = FILE_ptr
PyFile_AsFile.argtypes = [ctypes.py_object]
# Generated enum types #
class _Enum(ctypes.c_uint):
'''(INTERNAL) Base class
'''
_enum_names_ = {}
def __str__(self):
n = self._enum_names_.get(self.value, '') or ('FIXME_(%r)' % (self.value,))
return '.'.join((self.__class__.__name__, n))
def __hash__(self):
return self.value
def __repr__(self):
return '.'.join((self.__class__.__module__, self.__str__()))
def __eq__(self, other):
return ( (isinstance(other, _Enum) and self.value == other.value)
or (isinstance(other, _Ints) and self.value == other) )
def __ne__(self, other):
return not self.__eq__(other)
class LogLevel(_Enum):
'''Logging messages level.
\note future libvlc versions may define new levels.
'''
_enum_names_ = {
0: 'DEBUG',
2: 'NOTICE',
3: 'WARNING',
4: 'ERROR',
}
LogLevel.DEBUG = LogLevel(0)
LogLevel.ERROR = LogLevel(4)
LogLevel.NOTICE = LogLevel(2)
LogLevel.WARNING = LogLevel(3)
class EventType(_Enum):
'''Event types.
'''
_enum_names_ = {
0: 'MediaMetaChanged',
1: 'MediaSubItemAdded',
2: 'MediaDurationChanged',
3: 'MediaParsedChanged',
4: 'MediaFreed',
5: 'MediaStateChanged',
0x100: 'MediaPlayerMediaChanged',
257: 'MediaPlayerNothingSpecial',
258: 'MediaPlayerOpening',
259: 'MediaPlayerBuffering',
260: 'MediaPlayerPlaying',
261: 'MediaPlayerPaused',
262: 'MediaPlayerStopped',
263: 'MediaPlayerForward',
264: 'MediaPlayerBackward',
265: 'MediaPlayerEndReached',
266: 'MediaPlayerEncounteredError',
267: 'MediaPlayerTimeChanged',
268: 'MediaPlayerPositionChanged',
269: 'MediaPlayerSeekableChanged',
270: 'MediaPlayerPausableChanged',
271: 'MediaPlayerTitleChanged',
272: 'MediaPlayerSnapshotTaken',
273: 'MediaPlayerLengthChanged',
274: 'MediaPlayerVout',
0x200: 'MediaListItemAdded',
513: 'MediaListWillAddItem',
514: 'MediaListItemDeleted',
515: 'MediaListWillDeleteItem',
0x300: 'MediaListViewItemAdded',
769: 'MediaListViewWillAddItem',
770: 'MediaListViewItemDeleted',
771: 'MediaListViewWillDeleteItem',
0x400: 'MediaListPlayerPlayed',
1025: 'MediaListPlayerNextItemSet',
1026: 'MediaListPlayerStopped',
0x500: 'MediaDiscovererStarted',
1281: 'MediaDiscovererEnded',
0x600: 'VlmMediaAdded',
1537: 'VlmMediaRemoved',
1538: 'VlmMediaChanged',
1539: 'VlmMediaInstanceStarted',
1540: 'VlmMediaInstanceStopped',
1541: 'VlmMediaInstanceStatusInit',
1542: 'VlmMediaInstanceStatusOpening',
1543: 'VlmMediaInstanceStatusPlaying',
1544: 'VlmMediaInstanceStatusPause',
1545: 'VlmMediaInstanceStatusEnd',
1546: 'VlmMediaInstanceStatusError',
}
EventType.MediaDiscovererEnded = EventType(1281)
EventType.MediaDiscovererStarted = EventType(0x500)
EventType.MediaDurationChanged = EventType(2)
EventType.MediaFreed = EventType(4)
EventType.MediaListItemAdded = EventType(0x200)
EventType.MediaListItemDeleted = EventType(514)
EventType.MediaListPlayerNextItemSet = EventType(1025)
EventType.MediaListPlayerPlayed = EventType(0x400)
EventType.MediaListPlayerStopped = EventType(1026)
EventType.MediaListViewItemAdded = EventType(0x300)
EventType.MediaListViewItemDeleted = EventType(770)
EventType.MediaListViewWillAddItem = EventType(769)
EventType.MediaListViewWillDeleteItem = EventType(771)
EventType.MediaListWillAddItem = EventType(513)
EventType.MediaListWillDeleteItem = EventType(515)
EventType.MediaMetaChanged = EventType(0)
EventType.MediaParsedChanged = EventType(3)
EventType.MediaPlayerBackward = EventType(264)
EventType.MediaPlayerBuffering = EventType(259)
EventType.MediaPlayerEncounteredError = EventType(266)
EventType.MediaPlayerEndReached = EventType(265)
EventType.MediaPlayerForward = EventType(263)
EventType.MediaPlayerLengthChanged = EventType(273)
EventType.MediaPlayerMediaChanged = EventType(0x100)
EventType.MediaPlayerNothingSpecial = EventType(257)
EventType.MediaPlayerOpening = EventType(258)
EventType.MediaPlayerPausableChanged = EventType(270)
EventType.MediaPlayerPaused = EventType(261)
EventType.MediaPlayerPlaying = EventType(260)
EventType.MediaPlayerPositionChanged = EventType(268)
EventType.MediaPlayerSeekableChanged = EventType(269)
EventType.MediaPlayerSnapshotTaken = EventType(272)
EventType.MediaPlayerStopped = EventType(262)
EventType.MediaPlayerTimeChanged = EventType(267)
EventType.MediaPlayerTitleChanged = EventType(271)
EventType.MediaPlayerVout = EventType(274)
EventType.MediaStateChanged = EventType(5)
EventType.MediaSubItemAdded = EventType(1)
EventType.VlmMediaAdded = EventType(0x600)
EventType.VlmMediaChanged = EventType(1538)
EventType.VlmMediaInstanceStarted = EventType(1539)
EventType.VlmMediaInstanceStatusEnd = EventType(1545)
EventType.VlmMediaInstanceStatusError = EventType(1546)
EventType.VlmMediaInstanceStatusInit = EventType(1541)
EventType.VlmMediaInstanceStatusOpening = EventType(1542)
EventType.VlmMediaInstanceStatusPause = EventType(1544)
EventType.VlmMediaInstanceStatusPlaying = EventType(1543)
EventType.VlmMediaInstanceStopped = EventType(1540)
EventType.VlmMediaRemoved = EventType(1537)
class Meta(_Enum):
'''Meta data types.
'''
_enum_names_ = {
0: 'Title',
1: 'Artist',
2: 'Genre',
3: 'Copyright',
4: 'Album',
5: 'TrackNumber',
6: 'Description',
7: 'Rating',
8: 'Date',
9: 'Setting',
10: 'URL',
11: 'Language',
12: 'NowPlaying',
13: 'Publisher',
14: 'EncodedBy',
15: 'ArtworkURL',
16: 'TrackID',
}
Meta.Album = Meta(4)
Meta.Artist = Meta(1)
Meta.ArtworkURL = Meta(15)
Meta.Copyright = Meta(3)
Meta.Date = Meta(8)
Meta.Description = Meta(6)
Meta.EncodedBy = Meta(14)
Meta.Genre = Meta(2)
Meta.Language = Meta(11)
Meta.NowPlaying = Meta(12)
Meta.Publisher = Meta(13)
Meta.Rating = Meta(7)
Meta.Setting = Meta(9)
Meta.Title = Meta(0)
Meta.TrackID = Meta(16)
Meta.TrackNumber = Meta(5)
Meta.URL = Meta(10)
class State(_Enum):
'''Note the order of libvlc_state_t enum must match exactly the order of
See mediacontrol_playerstatus, See input_state_e enums,
and videolan.libvlc.state (at bindings/cil/src/media.cs).
expected states by web plugins are:
idle/close=0, opening=1, buffering=2, playing=3, paused=4,
stopping=5, ended=6, error=7.
'''
_enum_names_ = {
0: 'NothingSpecial',
1: 'Opening',
2: 'Buffering',
3: 'Playing',
4: 'Paused',
5: 'Stopped',
6: 'Ended',
7: 'Error',
}
State.Buffering = State(2)
State.Ended = State(6)
State.Error = State(7)
State.NothingSpecial = State(0)
State.Opening = State(1)
State.Paused = State(4)
State.Playing = State(3)
State.Stopped = State(5)
class TrackType(_Enum):
'''N/A
'''
_enum_names_ = {
-1: 'unknown',
0: 'audio',
1: 'video',
2: 'text',
}
TrackType.audio = TrackType(0)
TrackType.text = TrackType(2)
TrackType.unknown = TrackType(-1)
TrackType.video = TrackType(1)
class PlaybackMode(_Enum):
'''Defines playback modes for playlist.
'''
_enum_names_ = {
0: 'default',
1: 'loop',
2: 'repeat',
}
PlaybackMode.default = PlaybackMode(0)
PlaybackMode.loop = PlaybackMode(1)
PlaybackMode.repeat = PlaybackMode(2)
class VideoMarqueeOption(_Enum):
'''Marq options definition.
'''
_enum_names_ = {
0: 'Enable',
1: 'Text',
2: 'Color',
3: 'Opacity',
4: 'Position',
5: 'Refresh',
6: 'Size',
7: 'Timeout',
8: 'marquee_X',
9: 'marquee_Y',
}
VideoMarqueeOption.Color = VideoMarqueeOption(2)
VideoMarqueeOption.Enable = VideoMarqueeOption(0)
VideoMarqueeOption.Opacity = VideoMarqueeOption(3)
VideoMarqueeOption.Position = VideoMarqueeOption(4)
VideoMarqueeOption.Refresh = VideoMarqueeOption(5)
VideoMarqueeOption.Size = VideoMarqueeOption(6)
VideoMarqueeOption.Text = VideoMarqueeOption(1)
VideoMarqueeOption.Timeout = VideoMarqueeOption(7)
VideoMarqueeOption.marquee_X = VideoMarqueeOption(8)
VideoMarqueeOption.marquee_Y = VideoMarqueeOption(9)
class NavigateMode(_Enum):
'''Navigation mode.
'''
_enum_names_ = {
0: 'activate',
1: 'up',
2: 'down',
3: 'left',
4: 'right',
}
NavigateMode.activate = NavigateMode(0)
NavigateMode.down = NavigateMode(2)
NavigateMode.left = NavigateMode(3)
NavigateMode.right = NavigateMode(4)
NavigateMode.up = NavigateMode(1)
class VideoLogoOption(_Enum):
'''Option values for libvlc_video_{get,set}_logo_{int,string}.
'''
_enum_names_ = {
0: 'enable',
1: 'file',
2: 'logo_x',
3: 'logo_y',
4: 'delay',
5: 'repeat',
6: 'opacity',
7: 'position',
}
VideoLogoOption.delay = VideoLogoOption(4)
VideoLogoOption.enable = VideoLogoOption(0)
VideoLogoOption.file = VideoLogoOption(1)
VideoLogoOption.logo_x = VideoLogoOption(2)
VideoLogoOption.logo_y = VideoLogoOption(3)
VideoLogoOption.opacity = VideoLogoOption(6)
VideoLogoOption.position = VideoLogoOption(7)
VideoLogoOption.repeat = VideoLogoOption(5)
class VideoAdjustOption(_Enum):
'''Option values for libvlc_video_{get,set}_adjust_{int,float,bool}.
'''
_enum_names_ = {
0: 'Enable',
1: 'Contrast',
2: 'Brightness',
3: 'Hue',
4: 'Saturation',
5: 'Gamma',
}
VideoAdjustOption.Brightness = VideoAdjustOption(2)
VideoAdjustOption.Contrast = VideoAdjustOption(1)
VideoAdjustOption.Enable = VideoAdjustOption(0)
VideoAdjustOption.Gamma = VideoAdjustOption(5)
VideoAdjustOption.Hue = VideoAdjustOption(3)
VideoAdjustOption.Saturation = VideoAdjustOption(4)
class AudioOutputDeviceTypes(_Enum):
'''Audio device types.
'''
_enum_names_ = {
-1: 'Error',
1: 'Mono',
2: 'Stereo',
4: '_2F2R',
5: '_3F2R',
6: '_5_1',
7: '_6_1',
8: '_7_1',
10: 'SPDIF',
}
AudioOutputDeviceTypes.Error = AudioOutputDeviceTypes(-1)
AudioOutputDeviceTypes.Mono = AudioOutputDeviceTypes(1)
AudioOutputDeviceTypes.SPDIF = AudioOutputDeviceTypes(10)
AudioOutputDeviceTypes.Stereo = AudioOutputDeviceTypes(2)
AudioOutputDeviceTypes._2F2R = AudioOutputDeviceTypes(4)
AudioOutputDeviceTypes._3F2R = AudioOutputDeviceTypes(5)
AudioOutputDeviceTypes._5_1 = AudioOutputDeviceTypes(6)
AudioOutputDeviceTypes._6_1 = AudioOutputDeviceTypes(7)
AudioOutputDeviceTypes._7_1 = AudioOutputDeviceTypes(8)
class AudioOutputChannel(_Enum):
'''Audio channels.
'''
_enum_names_ = {
-1: 'Error',
1: 'Stereo',
2: 'RStereo',
3: 'Left',
4: 'Right',
5: 'Dolbys',
}
AudioOutputChannel.Dolbys = AudioOutputChannel(5)
AudioOutputChannel.Error = AudioOutputChannel(-1)
AudioOutputChannel.Left = AudioOutputChannel(3)
AudioOutputChannel.RStereo = AudioOutputChannel(2)
AudioOutputChannel.Right = AudioOutputChannel(4)
AudioOutputChannel.Stereo = AudioOutputChannel(1)
class Callback(ctypes.c_void_p):
"""Callback function notification
\param p_event the event triggering the callback
"""
pass
class LogCb(ctypes.c_void_p):
"""Callback prototype for LibVLC log message handler.
\param data data pointer as given to L{libvlc_log_set}()
\param level message level (@ref enum libvlc_log_level)
\param ctx message context (meta-informations about the message)
\param fmt printf() format string (as defined by ISO C11)
\param args variable argument list for the format
\note Log message handlers <b>must</b> be thread-safe.
\warning The message context pointer, the format string parameters and the
variable arguments are only valid until the callback returns.
"""
pass
class VideoLockCb(ctypes.c_void_p):
"""Callback prototype to allocate and lock a picture buffer.
Whenever a new video frame needs to be decoded, the lock callback is
invoked. Depending on the video chroma, one or three pixel planes of
adequate dimensions must be returned via the second parameter. Those
planes must be aligned on 32-bytes boundaries.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}() [IN]
\param planes start address of the pixel planes (LibVLC allocates the array
of void pointers, this callback must initialize the array) [OUT]
\return a private pointer for the display and unlock callbacks to identify
the picture buffers
"""
pass
class VideoUnlockCb(ctypes.c_void_p):
"""Callback prototype to unlock a picture buffer.
When the video frame decoding is complete, the unlock callback is invoked.
This callback might not be needed at all. It is only an indication that the
application can now read the pixel values if it needs to.
\warning A picture buffer is unlocked after the picture is decoded,
but before the picture is displayed.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}() [IN]
\param picture private pointer returned from the @ref libvlc_video_lock_cb
callback [IN]
\param planes pixel planes as defined by the @ref libvlc_video_lock_cb
callback (this parameter is only for convenience) [IN]
"""
pass
class VideoDisplayCb(ctypes.c_void_p):
"""Callback prototype to display a picture.
When the video frame needs to be shown, as determined by the media playback
clock, the display callback is invoked.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}() [IN]
\param picture private pointer returned from the @ref libvlc_video_lock_cb
callback [IN]
"""
pass
class VideoFormatCb(ctypes.c_void_p):
"""Callback prototype to configure picture buffers format.
This callback gets the format of the video as output by the video decoder
and the chain of video filters (if any). It can opt to change any parameter
as it needs. In that case, LibVLC will attempt to convert the video format
(rescaling and chroma conversion) but these operations can be CPU intensive.
\param opaque pointer to the private pointer passed to
L{libvlc_video_set_callbacks}() [IN/OUT]
\param chroma pointer to the 4 bytes video format identifier [IN/OUT]
\param width pointer to the pixel width [IN/OUT]
\param height pointer to the pixel height [IN/OUT]
\param pitches table of scanline pitches in bytes for each pixel plane
(the table is allocated by LibVLC) [OUT]
\param lines table of scanlines count for each plane [OUT]
\return the number of picture buffers allocated, 0 indicates failure
\note
For each pixels plane, the scanline pitch must be bigger than or equal to
the number of bytes per pixel multiplied by the pixel width.
Similarly, the number of scanlines must be bigger than of equal to
the pixel height.
Furthermore, we recommend that pitches and lines be multiple of 32
to not break assumption that might be made by various optimizations
in the video decoders, video filters and/or video converters.
"""
pass
class VideoCleanupCb(ctypes.c_void_p):
"""Callback prototype to configure picture buffers format.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}()
(and possibly modified by @ref libvlc_video_format_cb) [IN]
"""
pass
class AudioPlayCb(ctypes.c_void_p):
"""Callback prototype for audio playback.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param samples pointer to the first audio sample to play back [IN]
\param count number of audio samples to play back
\param pts expected play time stamp (see libvlc_delay())
"""
pass
class AudioPauseCb(ctypes.c_void_p):
"""Callback prototype for audio pause.
\note The pause callback is never called if the audio is already paused.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param pts time stamp of the pause request (should be elapsed already)
"""
pass
class AudioResumeCb(ctypes.c_void_p):
"""Callback prototype for audio resumption (i.e. restart from pause).
\note The resume callback is never called if the audio is not paused.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param pts time stamp of the resumption request (should be elapsed already)
"""
pass
class AudioFlushCb(ctypes.c_void_p):
"""Callback prototype for audio buffer flush
(i.e. discard all pending buffers and stop playback as soon as possible).
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
"""
pass
class AudioDrainCb(ctypes.c_void_p):
"""Callback prototype for audio buffer drain
(i.e. wait for pending buffers to be played).
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
"""
pass
class AudioSetVolumeCb(ctypes.c_void_p):
"""Callback prototype for audio volume change.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param volume software volume (1. = nominal, 0. = mute)
\param mute muted flag
"""
pass
class AudioSetupCb(ctypes.c_void_p):
"""Callback prototype to setup the audio playback.
This is called when the media player needs to create a new audio output.
\param opaque pointer to the data pointer passed to
L{libvlc_audio_set_callbacks}() [IN/OUT]
\param format 4 bytes sample format [IN/OUT]
\param rate sample rate [IN/OUT]
\param channels channels count [IN/OUT]
\return 0 on success, anything else to skip audio playback
"""
pass
class AudioCleanupCb(ctypes.c_void_p):
"""Callback prototype for audio playback cleanup.
This is called when the media player no longer needs an audio output.
\param opaque data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
"""
pass
class CallbackDecorators(object):
"Class holding various method decorators for callback functions."
Callback = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p)
Callback.__doc__ = '''Callback function notification
\param p_event the event triggering the callback
'''
LogCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_int, Log_ptr, ctypes.c_char_p, ctypes.c_void_p)
LogCb.__doc__ = '''Callback prototype for LibVLC log message handler.
\param data data pointer as given to L{libvlc_log_set}()
\param level message level (@ref enum libvlc_log_level)
\param ctx message context (meta-informations about the message)
\param fmt printf() format string (as defined by ISO C11)
\param args variable argument list for the format
\note Log message handlers <b>must</b> be thread-safe.
\warning The message context pointer, the format string parameters and the
variable arguments are only valid until the callback returns.
'''
VideoLockCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ListPOINTER(ctypes.c_void_p))
VideoLockCb.__doc__ = '''Callback prototype to allocate and lock a picture buffer.
Whenever a new video frame needs to be decoded, the lock callback is
invoked. Depending on the video chroma, one or three pixel planes of
adequate dimensions must be returned via the second parameter. Those
planes must be aligned on 32-bytes boundaries.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}() [IN]
\param planes start address of the pixel planes (LibVLC allocates the array
of void pointers, this callback must initialize the array) [OUT]
\return a private pointer for the display and unlock callbacks to identify
the picture buffers
'''
VideoUnlockCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p, ListPOINTER(ctypes.c_void_p))
VideoUnlockCb.__doc__ = '''Callback prototype to unlock a picture buffer.
When the video frame decoding is complete, the unlock callback is invoked.
This callback might not be needed at all. It is only an indication that the
application can now read the pixel values if it needs to.
\warning A picture buffer is unlocked after the picture is decoded,
but before the picture is displayed.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}() [IN]
\param picture private pointer returned from the @ref libvlc_video_lock_cb
callback [IN]
\param planes pixel planes as defined by the @ref libvlc_video_lock_cb
callback (this parameter is only for convenience) [IN]
'''
VideoDisplayCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p)
VideoDisplayCb.__doc__ = '''Callback prototype to display a picture.
When the video frame needs to be shown, as determined by the media playback
clock, the display callback is invoked.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}() [IN]
\param picture private pointer returned from the @ref libvlc_video_lock_cb
callback [IN]
'''
VideoFormatCb = ctypes.CFUNCTYPE(ctypes.POINTER(ctypes.c_uint), ListPOINTER(ctypes.c_void_p), ctypes.c_char_p, ctypes.POINTER(ctypes.c_uint), ctypes.POINTER(ctypes.c_uint), ctypes.POINTER(ctypes.c_uint), ctypes.POINTER(ctypes.c_uint))
VideoFormatCb.__doc__ = '''Callback prototype to configure picture buffers format.
This callback gets the format of the video as output by the video decoder
and the chain of video filters (if any). It can opt to change any parameter
as it needs. In that case, LibVLC will attempt to convert the video format
(rescaling and chroma conversion) but these operations can be CPU intensive.
\param opaque pointer to the private pointer passed to
L{libvlc_video_set_callbacks}() [IN/OUT]
\param chroma pointer to the 4 bytes video format identifier [IN/OUT]
\param width pointer to the pixel width [IN/OUT]
\param height pointer to the pixel height [IN/OUT]
\param pitches table of scanline pitches in bytes for each pixel plane
(the table is allocated by LibVLC) [OUT]
\param lines table of scanlines count for each plane [OUT]
\return the number of picture buffers allocated, 0 indicates failure
\note
For each pixels plane, the scanline pitch must be bigger than or equal to
the number of bytes per pixel multiplied by the pixel width.
Similarly, the number of scanlines must be bigger than of equal to
the pixel height.
Furthermore, we recommend that pitches and lines be multiple of 32
to not break assumption that might be made by various optimizations
in the video decoders, video filters and/or video converters.
'''
VideoCleanupCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p)
VideoCleanupCb.__doc__ = '''Callback prototype to configure picture buffers format.
\param opaque private pointer as passed to L{libvlc_video_set_callbacks}()
(and possibly modified by @ref libvlc_video_format_cb) [IN]
'''
AudioPlayCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p, ctypes.c_uint, ctypes.c_int64)
AudioPlayCb.__doc__ = '''Callback prototype for audio playback.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param samples pointer to the first audio sample to play back [IN]
\param count number of audio samples to play back
\param pts expected play time stamp (see libvlc_delay())
'''
AudioPauseCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_int64)
AudioPauseCb.__doc__ = '''Callback prototype for audio pause.
\note The pause callback is never called if the audio is already paused.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param pts time stamp of the pause request (should be elapsed already)
'''
AudioResumeCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_int64)
AudioResumeCb.__doc__ = '''Callback prototype for audio resumption (i.e. restart from pause).
\note The resume callback is never called if the audio is not paused.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param pts time stamp of the resumption request (should be elapsed already)
'''
AudioFlushCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_int64)
AudioFlushCb.__doc__ = '''Callback prototype for audio buffer flush
(i.e. discard all pending buffers and stop playback as soon as possible).
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
'''
AudioDrainCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p)
AudioDrainCb.__doc__ = '''Callback prototype for audio buffer drain
(i.e. wait for pending buffers to be played).
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
'''
AudioSetVolumeCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.c_float, ctypes.c_bool)
AudioSetVolumeCb.__doc__ = '''Callback prototype for audio volume change.
\param data data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
\param volume software volume (1. = nominal, 0. = mute)
\param mute muted flag
'''
AudioSetupCb = ctypes.CFUNCTYPE(ctypes.POINTER(ctypes.c_int), ListPOINTER(ctypes.c_void_p), ctypes.c_char_p, ctypes.POINTER(ctypes.c_uint), ctypes.POINTER(ctypes.c_uint))
AudioSetupCb.__doc__ = '''Callback prototype to setup the audio playback.
This is called when the media player needs to create a new audio output.
\param opaque pointer to the data pointer passed to
L{libvlc_audio_set_callbacks}() [IN/OUT]
\param format 4 bytes sample format [IN/OUT]
\param rate sample rate [IN/OUT]
\param channels channels count [IN/OUT]
\return 0 on success, anything else to skip audio playback
'''
AudioCleanupCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p)
AudioCleanupCb.__doc__ = '''Callback prototype for audio playback cleanup.
This is called when the media player no longer needs an audio output.
\param opaque data pointer as passed to L{libvlc_audio_set_callbacks}() [IN]
'''
cb = CallbackDecorators
# End of generated enum types #
# From libvlc_structures.h
class AudioOutput(_Cstruct):
def __str__(self):
return '%s(%s:%s)' % (self.__class__.__name__, self.name, self.description)
AudioOutput._fields_ = [ # recursive struct
('name', ctypes.c_char_p),
('description', ctypes.c_char_p),
('next', ctypes.POINTER(AudioOutput)),
]
class LogMessage(_Cstruct):
_fields_ = [
('size', ctypes.c_uint ),
('severity', ctypes.c_int ),
('type', ctypes.c_char_p),
('name', ctypes.c_char_p),
('header', ctypes.c_char_p),
('message', ctypes.c_char_p),
]
def __init__(self):
super(LogMessage, self).__init__()
self.size = ctypes.sizeof(self)
def __str__(self):
return '%s(%d:%s): %s' % (self.__class__.__name__, self.severity, self.type, self.message)
class MediaEvent(_Cstruct):
_fields_ = [
('media_name', ctypes.c_char_p),
('instance_name', ctypes.c_char_p),
]
class MediaStats(_Cstruct):
_fields_ = [
('read_bytes', ctypes.c_int ),
('input_bitrate', ctypes.c_float),
('demux_read_bytes', ctypes.c_int ),
('demux_bitrate', ctypes.c_float),
('demux_corrupted', ctypes.c_int ),
('demux_discontinuity', ctypes.c_int ),
('decoded_video', ctypes.c_int ),
('decoded_audio', ctypes.c_int ),
('displayed_pictures', ctypes.c_int ),
('lost_pictures', ctypes.c_int ),