def __init__(self, filename, file=None):
if file is not None:
raise NotImplementedError('TODO: Load from file stream')
self._file = av.avbin_open_filename(filename)
if not self._file:
raise AVbinException('Could not open "%s"' % filename)
self._video_stream = None
self._video_stream_index = -1
self._audio_stream = None
self._audio_stream_index = -1
file_info = AVbinFileInfo()
file_info.structure_size = ctypes.sizeof(file_info)
av.avbin_file_info(self._file, ctypes.byref(file_info))
self._duration = timestamp_from_avbin(file_info.duration)
self.info = SourceInfo()
self.info.title = file_info.title
self.info.author = file_info.author
self.info.copyright = file_info.copyright
self.info.comment = file_info.comment
self.info.album = file_info.album
self.info.year = file_info.year
self.info.track = file_info.track
self.info.genre = file_info.genre
# Pick the first video and audio streams found, ignore others.
for i in range(file_info.n_streams):
info = AVbinStreamInfo8()
info.structure_size = ctypes.sizeof(info)
av.avbin_stream_info(self._file, i, info)
if (info.type == AVBIN_STREAM_TYPE_VIDEO and
not self._video_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.video_format = VideoFormat(
width=info.u.video.width,
height=info.u.video.height)
if info.u.video.sample_aspect_num != 0:
self.video_format.sample_aspect = (
float(info.u.video.sample_aspect_num) /
info.u.video.sample_aspect_den)
if _have_frame_rate:
self.video_format.frame_rate = (
float(info.u.video.frame_rate_num) /
info.u.video.frame_rate_den)
self._video_stream = stream
self._video_stream_index = i
elif (info.type == AVBIN_STREAM_TYPE_AUDIO and
info.u.audio.sample_bits in (8, 16) and
info.u.audio.channels in (1, 2) and
not self._audio_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.audio_format = AudioFormat(
channels=info.u.audio.channels,
sample_size=info.u.audio.sample_bits,
sample_rate=info.u.audio.sample_rate)
self._audio_stream = stream
self._audio_stream_index = i
self._packet = AVbinPacket()
self._packet.structure_size = ctypes.sizeof(self._packet)
self._packet.stream_index = -1
self._events = []
# Timestamp of last video packet added to decoder queue.
self._video_timestamp = 0
self._buffered_audio_data = []
if self.audio_format:
self._audio_buffer = \
(ctypes.c_uint8 * av.avbin_get_audio_buffer_size())()
if self.video_format:
self._video_packets = []
self._decode_thread = WorkerThread()
self._decode_thread.start()
self._condition = threading.Condition()
def __init__(self, filename, file=None):
if file is not None:
raise NotImplementedError('TODO: Load from file stream')
self._file = av.avbin_open_filename(filename)
if not self._file:
raise AVbinException('Could not open "%s"' % filename)
self._video_stream = None
self._video_stream_index = -1
self._audio_stream = None
self._audio_stream_index = -1
file_info = AVbinFileInfo()
file_info.structure_size = ctypes.sizeof(file_info)
av.avbin_file_info(self._file, ctypes.byref(file_info))
self._duration = timestamp_from_avbin(file_info.duration)
self.info = SourceInfo()
self.info.title = file_info.title
self.info.author = file_info.author
self.info.copyright = file_info.copyright
self.info.comment = file_info.comment
self.info.album = file_info.album
self.info.year = file_info.year
self.info.track = file_info.track
self.info.genre = file_info.genre
# Pick the first video and audio streams found, ignore others.
for i in range(file_info.n_streams):
info = AVbinStreamInfo8()
info.structure_size = ctypes.sizeof(info)
av.avbin_stream_info(self._file, i, info)
if (info.type == AVBIN_STREAM_TYPE_VIDEO
and not self._video_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.video_format = VideoFormat(width=info.u.video.width,
height=info.u.video.height)
if info.u.video.sample_aspect_num != 0:
self.video_format.sample_aspect = (
float(info.u.video.sample_aspect_num) /
info.u.video.sample_aspect_den)
if _have_frame_rate:
self.video_format.frame_rate = (
float(info.u.video.frame_rate_num) /
info.u.video.frame_rate_den)
self._video_stream = stream
self._video_stream_index = i
elif (info.type == AVBIN_STREAM_TYPE_AUDIO
and info.u.audio.sample_bits in (8, 16)
and info.u.audio.channels in (1, 2)
and not self._audio_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.audio_format = AudioFormat(
channels=info.u.audio.channels,
sample_size=info.u.audio.sample_bits,
sample_rate=info.u.audio.sample_rate)
self._audio_stream = stream
self._audio_stream_index = i
self._packet = AVbinPacket()
self._packet.structure_size = ctypes.sizeof(self._packet)
self._packet.stream_index = -1
self._events = []
# Timestamp of last video packet added to decoder queue.
self._video_timestamp = 0
self._buffered_audio_data = []
if self.audio_format:
self._audio_buffer = \
(ctypes.c_uint8 * av.avbin_get_audio_buffer_size())()
if self.video_format:
self._video_packets = []
self._decode_thread = WorkerThread()
self._decode_thread.start()
self._condition = threading.Condition()
class AVbinSource(StreamingSource):
def __init__(self, filename, file=None):
if file is not None:
raise NotImplementedError('TODO: Load from file stream')
self._file = av.avbin_open_filename(filename)
if not self._file:
raise AVbinException('Could not open "%s"' % filename)
self._video_stream = None
self._video_stream_index = -1
self._audio_stream = None
self._audio_stream_index = -1
file_info = AVbinFileInfo()
file_info.structure_size = ctypes.sizeof(file_info)
av.avbin_file_info(self._file, ctypes.byref(file_info))
self._duration = timestamp_from_avbin(file_info.duration)
self.info = SourceInfo()
self.info.title = file_info.title
self.info.author = file_info.author
self.info.copyright = file_info.copyright
self.info.comment = file_info.comment
self.info.album = file_info.album
self.info.year = file_info.year
self.info.track = file_info.track
self.info.genre = file_info.genre
# Pick the first video and audio streams found, ignore others.
for i in range(file_info.n_streams):
info = AVbinStreamInfo8()
info.structure_size = ctypes.sizeof(info)
av.avbin_stream_info(self._file, i, info)
if (info.type == AVBIN_STREAM_TYPE_VIDEO and
not self._video_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.video_format = VideoFormat(
width=info.u.video.width,
height=info.u.video.height)
if info.u.video.sample_aspect_num != 0:
self.video_format.sample_aspect = (
float(info.u.video.sample_aspect_num) /
info.u.video.sample_aspect_den)
if _have_frame_rate:
self.video_format.frame_rate = (
float(info.u.video.frame_rate_num) /
info.u.video.frame_rate_den)
self._video_stream = stream
self._video_stream_index = i
elif (info.type == AVBIN_STREAM_TYPE_AUDIO and
info.u.audio.sample_bits in (8, 16) and
info.u.audio.channels in (1, 2) and
not self._audio_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.audio_format = AudioFormat(
channels=info.u.audio.channels,
sample_size=info.u.audio.sample_bits,
sample_rate=info.u.audio.sample_rate)
self._audio_stream = stream
self._audio_stream_index = i
self._packet = AVbinPacket()
self._packet.structure_size = ctypes.sizeof(self._packet)
self._packet.stream_index = -1
self._events = []
# Timestamp of last video packet added to decoder queue.
self._video_timestamp = 0
self._buffered_audio_data = []
if self.audio_format:
self._audio_buffer = \
(ctypes.c_uint8 * av.avbin_get_audio_buffer_size())()
if self.video_format:
self._video_packets = []
self._decode_thread = WorkerThread()
self._decode_thread.start()
self._condition = threading.Condition()
def __del__(self):
if _debug:
print 'del avbin source'
try:
if self._video_stream:
av.avbin_close_stream(self._video_stream)
if self._audio_stream:
av.avbin_close_stream(self._audio_stream)
av.avbin_close_file(self._file)
except:
pass
# XXX TODO call this / add to source api
def delete(self):
if self.video_format:
self._decode_thread.stop()
def seek(self, timestamp):
if _debug:
print 'AVbin seek', timestamp
av.avbin_seek_file(self._file, timestamp_to_avbin(timestamp))
self._audio_packet_size = 0
del self._events[:]
del self._buffered_audio_data[:]
if self.video_format:
self._video_timestamp = 0
self._condition.acquire()
for packet in self._video_packets:
packet.image = None
self._condition.notify()
self._condition.release()
del self._video_packets[:]
self._decode_thread.clear_jobs()
def _get_packet(self):
# Read a packet into self._packet. Returns True if OK, False if no
# more packets are in stream.
return av.avbin_read(self._file, self._packet) == AVBIN_RESULT_OK
def _process_packet(self):
# Returns (packet_type, packet), where packet_type = 'video' or
# 'audio'; and packet is VideoPacket or AudioData. In either case,
# packet is buffered or queued for decoding; no further action is
# necessary. Returns (None, None) if packet was neither type.
if self._packet.stream_index == self._video_stream_index:
if self._packet.timestamp < 0:
# XXX TODO
# AVbin needs hack to decode timestamp for B frames in
# some containers (OGG?). See
# http://www.dranger.com/ffmpeg/tutorial05.html
# For now we just drop these frames.
return None, None
video_packet = VideoPacket(self._packet)
if _debug:
print 'Created and queued frame %d (%f)' % \
(video_packet.id, video_packet.timestamp)
self._video_timestamp = max(self._video_timestamp,
video_packet.timestamp)
self._video_packets.append(video_packet)
self._decode_thread.put_job(
lambda: self._decode_video_packet(video_packet))
return 'video', video_packet
elif self._packet.stream_index == self._audio_stream_index:
audio_data = self._decode_audio_packet()
if audio_data:
if _debug:
print 'Got an audio packet at', audio_data.timestamp
self._buffered_audio_data.append(audio_data)
return 'audio', audio_data
return None, None
def get_audio_data(self, bytes):
try:
audio_data = self._buffered_audio_data.pop(0)
audio_data_timeend = audio_data.timestamp + audio_data.duration
except IndexError:
audio_data = None
audio_data_timeend = self._video_timestamp + 1
if _debug:
print 'get_audio_data'
have_video_work = False
# Keep reading packets until we have an audio packet and all the
# associated video packets have been enqueued on the decoder thread.
while not audio_data or (
self._video_stream and self._video_timestamp < audio_data_timeend):
if not self._get_packet():
break
packet_type, packet = self._process_packet()
if packet_type == 'video':
have_video_work = True
elif not audio_data and packet_type == 'audio':
audio_data = self._buffered_audio_data.pop(0)
if _debug:
print 'Got requested audio packet at', audio_data.timestamp
audio_data_timeend = audio_data.timestamp + audio_data.duration
if have_video_work:
# Give decoder thread a chance to run before we return this audio
# data.
time.sleep(0)
if not audio_data:
if _debug:
print 'get_audio_data returning None'
return None
while self._events and self._events[0].timestamp <= audio_data_timeend:
event = self._events.pop(0)
if event.timestamp >= audio_data.timestamp:
event.timestamp -= audio_data.timestamp
audio_data.events.append(event)
if _debug:
print 'get_audio_data returning ts %f with events' % \
audio_data.timestamp, audio_data.events
print 'remaining events are', self._events
return audio_data
def _decode_audio_packet(self):
packet = self._packet
size_out = ctypes.c_int(len(self._audio_buffer))
while True:
audio_packet_ptr = ctypes.cast(packet.data, ctypes.c_void_p)
audio_packet_size = packet.size
used = av.avbin_decode_audio(self._audio_stream,
audio_packet_ptr, audio_packet_size,
self._audio_buffer, size_out)
if used < 0:
self._audio_packet_size = 0
break
audio_packet_ptr.value += used
audio_packet_size -= used
if size_out.value <= 0:
continue
# XXX how did this ever work? replaced with copy below
# buffer = ctypes.string_at(self._audio_buffer, size_out)
# XXX to actually copy the data.. but it never used to crash, so
# maybe I'm missing something
buffer = ctypes.create_string_buffer(size_out.value)
ctypes.memmove(buffer, self._audio_buffer, len(buffer))
buffer = buffer.raw
duration = float(len(buffer)) / self.audio_format.bytes_per_second
self._audio_packet_timestamp = \
timestamp = timestamp_from_avbin(packet.timestamp)
return AudioData(buffer, len(buffer), timestamp, duration, [])
def _decode_video_packet(self, packet):
width = self.video_format.width
height = self.video_format.height
pitch = width * 3
buffer = (ctypes.c_uint8 * (pitch * height))()
result = av.avbin_decode_video(self._video_stream,
packet.data, packet.size,
buffer)
if result < 0:
image_data = None
else:
image_data = image.ImageData(width, height, 'RGB', buffer, pitch)
packet.image = image_data
# Notify get_next_video_frame() that another one is ready.
self._condition.acquire()
self._condition.notify()
self._condition.release()
def _ensure_video_packets(self):
'''Process packets until a video packet has been queued (and begun
decoding). Return False if EOS.
'''
if not self._video_packets:
if _debug:
print 'No video packets...'
# Read ahead until we have another video packet
self._get_packet()
packet_type, _ = self._process_packet()
while packet_type and packet_type != 'video':
self._get_packet()
packet_type, _ = self._process_packet()
if not packet_type:
return False
if _debug:
print 'Queued packet', _
return True
def get_next_video_timestamp(self):
if not self.video_format:
return
if self._ensure_video_packets():
if _debug:
print 'Next video timestamp is', self._video_packets[0].timestamp
return self._video_packets[0].timestamp
def get_next_video_frame(self):
if not self.video_format:
return
if self._ensure_video_packets():
packet = self._video_packets.pop(0)
if _debug:
print 'Waiting for', packet
# Block until decoding is complete
self._condition.acquire()
while packet.image == 0:
self._condition.wait()
self._condition.release()
if _debug:
print 'Returning', packet
return packet.image
class AVbinSource(StreamingSource):
def __init__(self, filename, file=None):
if file is not None:
raise NotImplementedError('TODO: Load from file stream')
self._file = av.avbin_open_filename(filename)
if not self._file:
raise AVbinException('Could not open "%s"' % filename)
self._video_stream = None
self._video_stream_index = -1
self._audio_stream = None
self._audio_stream_index = -1
file_info = AVbinFileInfo()
file_info.structure_size = ctypes.sizeof(file_info)
av.avbin_file_info(self._file, ctypes.byref(file_info))
self._duration = timestamp_from_avbin(file_info.duration)
self.info = SourceInfo()
self.info.title = file_info.title
self.info.author = file_info.author
self.info.copyright = file_info.copyright
self.info.comment = file_info.comment
self.info.album = file_info.album
self.info.year = file_info.year
self.info.track = file_info.track
self.info.genre = file_info.genre
# Pick the first video and audio streams found, ignore others.
for i in range(file_info.n_streams):
info = AVbinStreamInfo8()
info.structure_size = ctypes.sizeof(info)
av.avbin_stream_info(self._file, i, info)
if (info.type == AVBIN_STREAM_TYPE_VIDEO
and not self._video_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.video_format = VideoFormat(width=info.u.video.width,
height=info.u.video.height)
if info.u.video.sample_aspect_num != 0:
self.video_format.sample_aspect = (
float(info.u.video.sample_aspect_num) /
info.u.video.sample_aspect_den)
if _have_frame_rate:
self.video_format.frame_rate = (
float(info.u.video.frame_rate_num) /
info.u.video.frame_rate_den)
self._video_stream = stream
self._video_stream_index = i
elif (info.type == AVBIN_STREAM_TYPE_AUDIO
and info.u.audio.sample_bits in (8, 16)
and info.u.audio.channels in (1, 2)
and not self._audio_stream):
stream = av.avbin_open_stream(self._file, i)
if not stream:
continue
self.audio_format = AudioFormat(
channels=info.u.audio.channels,
sample_size=info.u.audio.sample_bits,
sample_rate=info.u.audio.sample_rate)
self._audio_stream = stream
self._audio_stream_index = i
self._packet = AVbinPacket()
self._packet.structure_size = ctypes.sizeof(self._packet)
self._packet.stream_index = -1
self._events = []
# Timestamp of last video packet added to decoder queue.
self._video_timestamp = 0
self._buffered_audio_data = []
if self.audio_format:
self._audio_buffer = \
(ctypes.c_uint8 * av.avbin_get_audio_buffer_size())()
if self.video_format:
self._video_packets = []
self._decode_thread = WorkerThread()
self._decode_thread.start()
self._condition = threading.Condition()
def __del__(self):
if _debug:
print 'del avbin source'
try:
if self._video_stream:
av.avbin_close_stream(self._video_stream)
if self._audio_stream:
av.avbin_close_stream(self._audio_stream)
av.avbin_close_file(self._file)
except:
pass
# XXX TODO call this / add to source api
def delete(self):
if self.video_format:
self._decode_thread.stop()
def seek(self, timestamp):
if _debug:
print 'AVbin seek', timestamp
av.avbin_seek_file(self._file, timestamp_to_avbin(timestamp))
self._audio_packet_size = 0
del self._events[:]
del self._buffered_audio_data[:]
if self.video_format:
self._video_timestamp = 0
self._condition.acquire()
for packet in self._video_packets:
packet.image = None
self._condition.notify()
self._condition.release()
del self._video_packets[:]
self._decode_thread.clear_jobs()
def _get_packet(self):
# Read a packet into self._packet. Returns True if OK, False if no
# more packets are in stream.
return av.avbin_read(self._file, self._packet) == AVBIN_RESULT_OK
def _process_packet(self):
# Returns (packet_type, packet), where packet_type = 'video' or
# 'audio'; and packet is VideoPacket or AudioData. In either case,
# packet is buffered or queued for decoding; no further action is
# necessary. Returns (None, None) if packet was neither type.
if self._packet.stream_index == self._video_stream_index:
if self._packet.timestamp < 0:
# XXX TODO
# AVbin needs hack to decode timestamp for B frames in
# some containers (OGG?). See
# http://www.dranger.com/ffmpeg/tutorial05.html
# For now we just drop these frames.
return None, None
video_packet = VideoPacket(self._packet)
if _debug:
print 'Created and queued frame %d (%f)' % \
(video_packet.id, video_packet.timestamp)
self._video_timestamp = max(self._video_timestamp,
video_packet.timestamp)
self._video_packets.append(video_packet)
self._decode_thread.put_job(
lambda: self._decode_video_packet(video_packet))
return 'video', video_packet
elif self._packet.stream_index == self._audio_stream_index:
audio_data = self._decode_audio_packet()
if audio_data:
if _debug:
print 'Got an audio packet at', audio_data.timestamp
self._buffered_audio_data.append(audio_data)
return 'audio', audio_data
return None, None
def get_audio_data(self, bytes):
try:
audio_data = self._buffered_audio_data.pop(0)
audio_data_timeend = audio_data.timestamp + audio_data.duration
except IndexError:
audio_data = None
audio_data_timeend = self._video_timestamp + 1
if _debug:
print 'get_audio_data'
have_video_work = False
# Keep reading packets until we have an audio packet and all the
# associated video packets have been enqueued on the decoder thread.
while not audio_data or (self._video_stream and
self._video_timestamp < audio_data_timeend):
if not self._get_packet():
break
packet_type, packet = self._process_packet()
if packet_type == 'video':
have_video_work = True
elif not audio_data and packet_type == 'audio':
audio_data = self._buffered_audio_data.pop(0)
if _debug:
print 'Got requested audio packet at', audio_data.timestamp
audio_data_timeend = audio_data.timestamp + audio_data.duration
if have_video_work:
# Give decoder thread a chance to run before we return this audio
# data.
time.sleep(0)
if not audio_data:
if _debug:
print 'get_audio_data returning None'
return None
while self._events and self._events[0].timestamp <= audio_data_timeend:
event = self._events.pop(0)
if event.timestamp >= audio_data.timestamp:
event.timestamp -= audio_data.timestamp
audio_data.events.append(event)
if _debug:
print 'get_audio_data returning ts %f with events' % \
audio_data.timestamp, audio_data.events
print 'remaining events are', self._events
return audio_data
def _decode_audio_packet(self):
packet = self._packet
size_out = ctypes.c_int(len(self._audio_buffer))
while True:
audio_packet_ptr = ctypes.cast(packet.data, ctypes.c_void_p)
audio_packet_size = packet.size
used = av.avbin_decode_audio(self._audio_stream, audio_packet_ptr,
audio_packet_size, self._audio_buffer,
size_out)
if used < 0:
self._audio_packet_size = 0
break
audio_packet_ptr.value += used
audio_packet_size -= used
if size_out.value <= 0:
continue
# XXX how did this ever work? replaced with copy below
# buffer = ctypes.string_at(self._audio_buffer, size_out)
# XXX to actually copy the data.. but it never used to crash, so
# maybe I'm missing something
buffer = ctypes.create_string_buffer(size_out.value)
ctypes.memmove(buffer, self._audio_buffer, len(buffer))
buffer = buffer.raw
duration = float(len(buffer)) / self.audio_format.bytes_per_second
self._audio_packet_timestamp = \
timestamp = timestamp_from_avbin(packet.timestamp)
return AudioData(buffer, len(buffer), timestamp, duration, [])
def _decode_video_packet(self, packet):
width = self.video_format.width
height = self.video_format.height
pitch = width * 3
buffer = (ctypes.c_uint8 * (pitch * height))()
result = av.avbin_decode_video(self._video_stream, packet.data,
packet.size, buffer)
if result < 0:
image_data = None
else:
image_data = image.ImageData(width, height, 'RGB', buffer, pitch)
packet.image = image_data
# Notify get_next_video_frame() that another one is ready.
self._condition.acquire()
self._condition.notify()
self._condition.release()
def _ensure_video_packets(self):
'''Process packets until a video packet has been queued (and begun
decoding). Return False if EOS.
'''
if not self._video_packets:
if _debug:
print 'No video packets...'
# Read ahead until we have another video packet
self._get_packet()
packet_type, _ = self._process_packet()
while packet_type and packet_type != 'video':
self._get_packet()
packet_type, _ = self._process_packet()
if not packet_type:
return False
if _debug:
print 'Queued packet', _
return True
def get_next_video_timestamp(self):
if not self.video_format:
return
if self._ensure_video_packets():
if _debug:
print 'Next video timestamp is', self._video_packets[
0].timestamp
return self._video_packets[0].timestamp
def get_next_video_frame(self):
if not self.video_format:
return
if self._ensure_video_packets():
packet = self._video_packets.pop(0)
if _debug:
print 'Waiting for', packet
# Block until decoding is complete
self._condition.acquire()
while packet.image == 0:
self._condition.wait()
self._condition.release()
if _debug:
print 'Returning', packet
return packet.image
