def __enter__(self):
LOG.debug('Initializing SDL context')
sdl.SDL_Init(sdl.SDL_INIT_EVERYTHING)
LOG.debug('Initializing SDL mixer')
if sdlmixer.Mix_OpenAudio(44100, sdlmixer.MIX_DEFAULT_FORMAT, 2, 1024):
raise RuntimeError(
'Cannot open mixed audio: {}'.format(sdlmixer.Mix_GetError()))
if sdlmixer.Mix_Init(0) == -1:
raise RuntimeError(
'Cannot initialize mixer: {}'.format(sdlmixer.Mix_GetError()))
return self
def __init__(self, game):
super(SoundMixer, self).__init__()
self.mute = False
self.sounds = []
if sdl2.SDL_Init(sdl2.SDL_INIT_AUDIO) != 0:
raise RuntimeError("Cannot initialize audio system: {}".format(
sdl2.SDL_GetError()))
if sdlmixer.Mix_OpenAudio(44100, sdlmixer.MIX_DEFAULT_FORMAT, 2, 1024):
raise RuntimeError("Cannot open mixed audio: {}".format(
sdlmixer.Mix_GetError()))
if sdlmixer.Mix_AllocateChannels(64) != 64:
raise RuntimeError("Cannot allocate audio channels: {}".format(
sdlmixer.Mix_GetError()))
def play(self, loops):
channel = sdlmixer.Mix_PlayChannel(channel=-1,
chunk=self.sample,
loops=loops)
if channel == -1:
raise RuntimeError("Cannot play sample: {}".format(
sdlmixer.Mix_GetError()))
return channel
def loadSound(self, file):
# find if this file has been loaded before and return that if so
filepath = os.path.abspath(file)
for index, sound in enumerate(self.sounds):
if sound.path == filepath:
return index
# haven't seen this file before so add it and return new index
index = self._getNextEmptySlot()
try:
sample = sdlmixer.Mix_LoadWAV(
sdl2.ext.compat.byteify(filepath, "utf-8"))
if sample is None:
raise RuntimeError("Cannot open audio file: {}".format(
sdlmixer.Mix_GetError()))
self.sounds[index] = Sample(filepath, sample)
except Exception as e:
log(f"Problem loading sound: {str(e)} file: {filepath}")
return len(self.sounds) - 1
def play(self, volume=1.0, repeat=1):
'''
Play the sound
*Parameters:*
- `volume`: Sound volume 0.0 to 1.0
- `repeat`: Number of time to repeat the sound, 0=infinity
*Returns:*
Channel id of the sound
'''
channel = mixer.Mix_PlayChannel(-1, self.sample, repeat-1)
if channel == -1:
msg = "Cannot play the sound: %s" % mixer.Mix_GetError()
logger.error(msg)
raise SoundError(msg)
mixer.Mix_Volume(channel, int(mixer.MIX_MAX_VOLUME * volume))
return channel
def open(self, configuration):
'''Open and configure audio system
*Parameters:*
- `configuration`: Configuration parameters from Application
'''
if sdl2.SDL_InitSubSystem(sdl2.SDL_INIT_AUDIO) != 0:
msg = "Cannot initialize audio system: %s" % sdl2.SDL_GetError()
logger.critical(msg)
raise SDL2Error(msg)
if mixer.Mix_OpenAudio(mixer.MIX_DEFAULT_FREQUENCY,
mixer.MIX_DEFAULT_FORMAT, 2, 1024):
msg = "Cannot open mixed audio: %s" % mixer.Mix_GetError()
logger.critical(msg)
raise SDL2Error(msg)
mixer.Mix_AllocateChannels(configuration.audio_channel)
logger.info("Audio initialized")
def play(self, volume=1.0, repeat=1):
'''
Play the music
*Parameters:*
- `volume`: Sound volume 0.0 to 1.0
- `repeat`: Number of time to repeat the sound, 0=infinity
*Returns:*
Channel id of the sound
'''
if not repeat:
repeat = -1
result = mixer.Mix_PlayMusic(self.music, repeat)
if result == -1:
msg = "Cannot play the music: %s" % mixer.Mix_GetError()
logger.error(msg)
raise SoundError(msg)
mixer.Mix_VolumeMusic(int(mixer.MIX_MAX_VOLUME * volume))
def check_audio_codecs():
sdl2.SDL_Init(sdl2.SDL_INIT_AUDIO)
try:
libs = {
'FLAC': sdlmixer.MIX_INIT_FLAC,
'MOD': sdlmixer.MIX_INIT_MOD,
'MP3': sdlmixer.MIX_INIT_MP3,
'OGG': sdlmixer.MIX_INIT_OGG,
'MIDI': sdlmixer.MIX_INIT_MID,
'OPUS': sdlmixer.MIX_INIT_OPUS
}
for lib, flags in libs.items():
sdlmixer.Mix_SetError(b"")
ret = sdlmixer.Mix_Init(flags)
err = sdlmixer.Mix_GetError()
if err:
yield lib, err.decode('utf-8')
if ret & flags == flags:
yield lib, None
else:
yield lib, True
sdlmixer.Mix_Quit()
finally:
sdl2.SDL_Quit()
import traceback
traceback.print_exc()
sys.exit(1)
if __name__ == "__main__":
RESOURCES = sdl2.ext.Resources(__file__, "")
# Audio
if sdl2.SDL_Init(sdl2.SDL_INIT_AUDIO) != 0:
raise RuntimeError("Cannot initialize audio system: {}".format(
sdl2.SDL_GetError()))
# int Mix_OpenAudio(int frequency, Uint16 format, int channels, int chunksize)
if sdlmixer.Mix_OpenAudio(44100, sdlmixer.MIX_DEFAULT_FORMAT, 2, 1024):
raise RuntimeError("Cannot open mixed audio: {}".format(
sdlmixer.Mix_GetError()))
sdlmixer.Mix_AllocateChannels(64)
sound_file = RESOURCES.get_path("Cat.wav")
sample = sdlmixer.Mix_LoadWAV(sdl2.ext.compat.byteify(sound_file, "utf-8"))
if sample is None:
raise RuntimeError("Cannot open audio file: {}".format(
sdlmixer.Mix_GetError()))
count = 5
while count > 0:
channel = sdlmixer.Mix_PlayChannel(channel=-1, chunk=sample, loops=0)
sdlmixer.Mix_SetPosition(channel, 270, 100)
print(channel)
if channel == -1:
raise RuntimeError("Cannot play sample: {}".format(