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import ctypes as ct |
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import struct |
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import wave |
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from ed2d.openal import al |
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from ed2d.openal import alc |
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from ed2d import typeutils |
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class AudioContext(object): |
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def __init__(self): |
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self.device = None |
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self.context = None |
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def create(self): |
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self.device = alc.alcOpenDevice(None) |
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if not self.device: |
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self.destroy() |
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print("Error OpenAL init error.") # TODO - Make this an exception. |
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return |
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self.context = alc.alcCreateContext(self.device, None) |
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alc.alcMakeContextCurrent(self.context) |
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if not self.context: |
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self.destroy() |
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print("Error OpenAL init error.") # TODO - Make this an exception. |
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return |
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def destroy(self): |
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alc.alcMakeContextCurrent(None) |
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if self.context: |
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alc.alcDestroyContext(self.context) |
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if self.device: |
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alc.alcCloseDevice(self.device) |
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channelMap = {1:al.AL_FORMAT_MONO16, 2:al.AL_FORMAT_STEREO16} |
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class AudioFile(object): |
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def __init__(self, filePath): |
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wav = wave.open(filePath, mode='rb') |
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audioFormat = channelMap[wav.getnchannels()] |
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self.sampleSize = wav.getsampwidth() |
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self.samplerate = wav.getframerate() |
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self.source = al.ALuint() |
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al.alGenSources(1, ct.byref(self.source)) |
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al.alSourcef(self.source, al.AL_PITCH, 1.0) |
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al.alSourcef(self.source, al.AL_GAIN, 1.0) |
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al.alSource3f(self.source, al.AL_POSITION, 0.0, 0.0, 0.0) |
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al.alSource3f(self.source, al.AL_VELOCITY, 0.0, 0.0, 0.0) |
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al.alSourcei(self.source, al.AL_LOOPING, al.AL_FALSE) |
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self.buffer = al.ALuint() |
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al.alGenBuffers(1, ct.byref(self.buffer)) |
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samples = wav.getnframes() |
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bufferData = (ct.c_ubyte * (samples*2)) |
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bufferData = bufferData(*wav.readframes(samples)) |
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al.alBufferData(self.buffer, audioFormat, ct.byref(bufferData), self.sampleSize * samples, self.samplerate) |
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al.alSourcei(self.source, al.AL_BUFFER, self.buffer.value) |
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wav.close() |
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def destroy(self): |
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al.alDeleteSources(1, ct.byref(self.source)) |
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al.alDeleteBuffers(1, ct.byref(self.buffer)) |
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def play(self): |
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al.alSourcePlay(self.source) |
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def stop(self): |
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al.alSourceStop(self.source) |
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def pause(self): |
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al.alSourcePause(self.source) |
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def get_pos(self): |
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# this is super basic and will not work properly with stero audio files... |
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byteoffset = al.ALint() |
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al.alGetSourcei(self.source, al.AL_BYTE_OFFSET, ct.byref(byteoffset)) |
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byteoffset = byteoffset.value |
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return float(byteoffset) / self.samplerate |
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def volume(self, vol): |
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pass |
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class Audio(object): |
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def __init__(self): |
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self.context = AudioContext() |
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self.context.create() |
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# setup listener |
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al.alListener3f(al.AL_POSITION, 0.0, 0.0, 0.0) |
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al.alListener3f(al.AL_VELOCITY, 0.0, 0.0, 0.0) |
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al.alListener3f(al.AL_ORIENTATION, 0.0, 0.0, 0.0) |
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def destroy(self): |
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self.context.destroy() |
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explosiveduck /
ed2d
