def __init__(self, device_name=None):
super(OpenALDriver, self).__init__()
# TODO devices must be enumerated on Windows, otherwise 1.0 context is
# returned.
self._device = alc.alcOpenDevice(device_name)
if not self._device:
raise Exception("No OpenAL device.")
alcontext = alc.alcCreateContext(self._device, None)
alc.alcMakeContextCurrent(alcontext)
self.have_1_1 = self.have_version(1, 1) and False
self._lock = threading.Lock()
# Start worker thread
self.worker = OpenALWorker()
self.worker.start()
def __init__(self, device_name=None):
super(OpenALDriver, self).__init__()
# TODO devices must be enumerated on Windows, otherwise 1.0 context is
# returned.
self._device = alc.alcOpenDevice(device_name)
if not self._device:
raise Exception('No OpenAL device.')
alcontext = alc.alcCreateContext(self._device, None)
alc.alcMakeContextCurrent(alcontext)
self.have_1_1 = self.have_version(1, 1) and False
self._lock = threading.Lock()
# Start worker thread
self.worker = OpenALWorker()
self.worker.start()
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
if __name__ == '__main__':
import sys
# openal
device = alc.alcOpenDevice(None)
if not device:
raise Exception('No OpenAL device.')
alcontext = alc.alcCreateContext(device, None)
alc.alcMakeContextCurrent(alcontext)
source = al.ALuint()
al.alGenSources(1, source)
pool = BufferPool()
# avcodec
init()
container = open(sys.argv[1])
stream = get_audio_stream(container)
class AVCodecDecoder:
def __init__(self, container, stream):
self.codec = get_codec(container, stream)
if self.codec.contents.channels == 1:
self.buffer_format = al.AL_FORMAT_MONO16
elif self.codec.contents.channels == 2:
self.buffer_format = al.AL_FORMAT_STEREO16
else:
raise Exception('Invalid number of channels')
self.sample_rate = self.codec.contents.sample_rate
self.container = container
self.stream = stream
self.packet = avformat.AVPacket()
self.sample_buffer = \
(ctypes.c_int16 * (avcodec.AVCODEC_MAX_AUDIO_FRAME_SIZE / 2))()
self.read_packet()
def read_packet(self):
while True:
if self.packet.data:
self.packet.data = None
self.packet.size = 0
if avformat.av_read_packet(self.container, self.packet) < 0:
break
if self.packet.stream_index == self.stream:
break
self.packet_data = self.packet.data
self.packet_size = self.packet.size
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
import sys
# openal
device = alc.alcOpenDevice(None)
if not device:
raise Exception('No OpenAL device.')
alcontext = alc.alcCreateContext(device, None)
alc.alcMakeContextCurrent(alcontext)
source = al.ALuint()
al.alGenSources(1, source)
pool = BufferPool()
# avcodec
init()
container = open(sys.argv[1])
stream = get_audio_stream(container)
decoder = AVCodecDecoder(container, stream)
while True:
buffer = pool.get_buffer()
if not decoder.fill_buffer(buffer):
break
al.alSourceQueueBuffers(source, 1, buffer)
al.alSourcePlay(source)
while True:
value = al.ALint()
al.alGetSourcei(source, al.AL_SOURCE_STATE, value)
if value.value == al.AL_STOPPED:
break
time.sleep(1)
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
if __name__ == '__main__':
import sys
# openal
device = alc.alcOpenDevice(None)
if not device:
raise Exception('No OpenAL device.')
alcontext = alc.alcCreateContext(device, None)
alc.alcMakeContextCurrent(alcontext)
source = al.ALuint()
al.alGenSources(1, source)
pool = BufferPool()
# avcodec
init()
container = open(sys.argv[1])
stream = get_audio_stream(container)
