def fill_buffer(self, buffer): if self.packet_size <= 0: self.read_packet() if self.packet_size == 0: # EOS return False sample_buffer_size = ctypes.c_int() len = avcodec.avcodec_decode_audio(self.codec, self.sample_buffer, sample_buffer_size, self.packet_data, self.packet_size) if len < 0: # Error, skip frame raise Exception('frame error TODO') if sample_buffer_size.value > 0: al.alBufferData(buffer, self.buffer_format, self.sample_buffer, sample_buffer_size.value, self.sample_rate) # Advance buffer pointer self.packet_data = ctypes.c_uint8.from_address( ctypes.addressof(self.packet_data) + len) self.packet_size -= len return True
def refill(self, write_size): if _debug: print 'refill', write_size self._lock.acquire() while write_size > self._min_buffer_size: audio_data = self.source_group.get_audio_data(write_size) if not audio_data: self._eos = True self._events.append( (self._write_cursor, MediaEvent(0, 'on_eos'))) self._events.append( (self._write_cursor, MediaEvent(0, 'on_source_group_eos'))) break for event in audio_data.events: cursor = self._write_cursor + event.timestamp * \ self.source_group.audio_format.bytes_per_second self._events.append((cursor, event)) context.lock() buffer = bufferPool.getBuffer(self._al_source) al.alBufferData(buffer, self._al_format, audio_data.data, audio_data.length, self.source_group.audio_format.sample_rate) if _debug_buffers: error = al.alGetError() if error != 0: print("BUFFER DATA ERROR: " + str(error)) al.alSourceQueueBuffers(self._al_source, 1, ctypes.byref(buffer)) if _debug_buffers: error = al.alGetError() if error != 0: print("QUEUE BUFFER ERROR: " + str(error)) context.unlock() self._write_cursor += audio_data.length self._buffer_sizes.append(audio_data.length) self._buffer_timestamps.append(audio_data.timestamp) write_size -= audio_data.length # Check for underrun stopping playback if self._playing: state = al.ALint() context.lock() al.alGetSourcei(self._al_source, al.AL_SOURCE_STATE, state) if state.value != al.AL_PLAYING: if _debug: print 'underrun' al.alSourcePlay(self._al_source) context.unlock() self._lock.release()
def refill(self, write_size): if _debug: print "refill", write_size self._lock.acquire() while write_size > self._min_buffer_size: audio_data = self.source_group.get_audio_data(write_size) if not audio_data: self._eos = True self._events.append((self._write_cursor, MediaEvent(0, "on_eos"))) self._events.append((self._write_cursor, MediaEvent(0, "on_source_group_eos"))) break for event in audio_data.events: cursor = self._write_cursor + event.timestamp * self.source_group.audio_format.bytes_per_second self._events.append((cursor, event)) buffer = al.ALuint() context.lock() al.alGenBuffers(1, buffer) al.alBufferData( buffer, self._al_format, audio_data.data, audio_data.length, self.source_group.audio_format.sample_rate ) al.alSourceQueueBuffers(self._al_source, 1, ctypes.byref(buffer)) context.unlock() self._write_cursor += audio_data.length self._buffer_sizes.append(audio_data.length) self._buffer_timestamps.append(audio_data.timestamp) write_size -= audio_data.length # Check for underrun stopping playback if self._playing: state = al.ALint() context.lock() al.alGetSourcei(self._al_source, al.AL_SOURCE_STATE, state) if state.value != al.AL_PLAYING: if _debug: print "underrun" al.alSourcePlay(self._al_source) context.unlock() self._lock.release()