def run():
if len (sys.argv) < 2:
print ("Usage: %s wavefile" % os.path.basename(sys.argv[0]))
print (" Using an example wav file...")
wavefp = wave.open(RESOURCES.get("hey.wav"))
else:
wavefp = wave.open(sys.argv[1], "rb")
channels = wavefp.getnchannels()
bitrate = wavefp.getsampwidth() * 8
samplerate = wavefp.getframerate()
wavbuf = wavefp.readframes(wavefp.getnframes())
formatmap = {
(1, 8) : al.AL_FORMAT_MONO8,
(2, 8) : al.AL_FORMAT_STEREO8,
(1, 16): al.AL_FORMAT_MONO16,
(2, 16) : al.AL_FORMAT_STEREO16,
}
alformat = formatmap[(channels, bitrate)]
device = alc.open_device()
context = alc.create_context(device)
alc.make_context_current(context)
sources = al.gen_sources(1)
al.source_f(sources[0], al.AL_PITCH, 1)
al.source_f(sources[0], al.AL_GAIN, 1)
al.source_3f(sources[0], al.AL_POSITION, 0, 0, 0)
al.source_3f(sources[0], al.AL_VELOCITY, 0, 0, 0)
buffers = al.gen_buffers(1)
al.buffer_data(buffers[0], alformat, wavbuf, samplerate)
al.source_queue_buffers(sources[0], buffers)
al.source_play(sources[0])
state = al.get_source_i(sources[0], al.AL_SOURCE_STATE)
while state == al.AL_PLAYING:
print("playing the file...")
time.sleep(1)
state = al.get_source_i(sources[0], al.AL_SOURCE_STATE)
print("done")
al.delete_sources(sources)
al.delete_buffers(buffers)
alc.destroy_context(context)
alc.close_device(device)
def run():
# We can use OpenAL directly to play some sound, there is no
# necessity to use the audio module. This however is a bit more
# complex (read: involves writing more code) and less
# comfortable. For a direct OpenAL example, check the openal.py
# example file.
# Create a SoundSink. It is used do the output device handling,
# source and audio buffer management and anything else necessary
# to play sounds.
#
# You can create multiple sinks for different audio devices or for
# the same device, so that you can e.g. manage different positions
# for listening to sounds.
sink = audio.SoundSink()
# Create a SoundSource. The SoundSource defines an object within
# your application world, that can emit sounds. It could be e.g. a
# spaceship within your game, the general output object within your a
# music player application, ...
source = audio.SoundSource()
# Load a SoundData object from the passed WAV file. A SoundData is
# nothing more than a raw audio buffer (as PCM data), along with
# some information about its channels, bit rate and frequency.
data = audio.load_file(RESOURCES.get_path("hey.wav"))
# Add the SoundData to the source, so that it will be played, when
# the source is processed by the SoundSink.
source.queue(data)
# Tell the SoundSource that it shall be played on the next
# processing by the SoundSink. This will cause the SoundSink to
# buffer all attached SoundData objects of the SoundSource and play
# them in order.
source.request = audio.SOURCE_PLAY
sink.process_source(source)
# The main loop. In contrast to other exampes, we are checking the
# status of our previously created source directly. Once it is done
# playing, we exit from the loop to finish the program execution.
#
# The OpenAL sound system uses its own threads to play sounds and
# music so that we do not not handle it explicitly, if we do not
# need to perform more complex or synchronised operations. Hence,
# once a SoundSource was requested to play something and got
# processed, there is not much more left to do.
while True:
state = al.get_source_i(source.ssid, al.AL_SOURCE_STATE)
if state == al.AL_PLAYING:
print("playing...")
else:
print("done")
break
time.sleep(2)
def __del__(self):
"""Deletes the SoundSink and also destroys the associated
context and closes the bound audio output device."""
if self.context:
for ssid, source in self._sources.items():
querystate = al.get_source_i(ssid, al.AL_SOURCE_STATE)
if querystate != al.AL_STOPPED:
al.source_stop(ssid)
al.delete_sources([ssid])
source._ssid = None
self._sources = {}
al.delete_buffers(self._buffers.keys())
self._buffers = {}
alc.destroy_context(self.context)
if self._hasopened:
alc.close_device(self.device)
self.context = None
self.device = None
def process_source(self, source):
"""Processes a SoundSource.
Note: this does NOT activate the SoundSink. If another SoundSink
is active, chances are good that the source is processed in that
SoundSink.
"""
ssid = source._ssid
if ssid is None:
ssid = self._create_source(source)
# TODO: this should be only set on changes.
# al.source_f(ssid, al.AL_GAIN, source.gain)
# al.source_f(ssid, al.AL_PITCH, source.pitch)
# al.source_fv(ssid, al.AL_POSITION, source.position)
# al.source_fv(ssid, al.AL_VELOCITY, source.velocity)
self._create_buffers(source)
querystate = al.get_source_i(ssid, al.AL_SOURCE_STATE)
if source.request == SOURCE_NONE:
# if no change is to be made, nothing will be done.
pass
elif source.request == SOURCE_REWIND:
al.source_rewind(ssid)
source.request = SOURCE_NONE
elif source.request == SOURCE_PLAY:
if querystate != al.AL_PLAYING:
al.source_play(ssid)
source.request = SOURCE_NONE
elif source.request == SOURCE_STOP:
if querystate != al.AL_STOPPED:
al.source_stop(ssid)
source.request = SOURCE_NONE
elif source.request == SOURCE_PAUSE:
if querystate != al.AL_PAUSED:
al.source_pause(ssid)
source.request = SOURCE_NONE
else:
raise ValueError("invalid request state on source")
