nsresult BufferedAudioStream::Init(int32_t aNumChannels, int32_t aRate, const dom::AudioChannelType aAudioChannelType) { cubeb* cubebContext = GetCubebContext(); if (!cubebContext || aNumChannels < 0 || aRate < 0) { return NS_ERROR_FAILURE; } mInRate = mOutRate = aRate; mChannels = aNumChannels; mDumpFile = OpenDumpFile(this); cubeb_stream_params params; params.rate = aRate; params.channels = aNumChannels; #if defined(__ANDROID__) #if defined(MOZ_B2G) params.stream_type = ConvertChannelToCubebType(aAudioChannelType); #else params.stream_type = CUBEB_STREAM_TYPE_MUSIC; #endif if (params.stream_type == CUBEB_STREAM_TYPE_MAX) { return NS_ERROR_INVALID_ARG; } #endif if (AUDIO_OUTPUT_FORMAT == AUDIO_FORMAT_S16) { params.format = CUBEB_SAMPLE_S16NE; } else { params.format = CUBEB_SAMPLE_FLOAT32NE; } mBytesPerFrame = sizeof(AudioDataValue) * aNumChannels; mAudioClock.Init(); { cubeb_stream* stream; if (cubeb_stream_init(cubebContext, &stream, "BufferedAudioStream", params, GetCubebLatency(), DataCallback_S, StateCallback_S, this) == CUBEB_OK) { mCubebStream.own(stream); } } if (!mCubebStream) { return NS_ERROR_FAILURE; } // Size mBuffer for one second of audio. This value is arbitrary, and was // selected based on the observed behaviour of the existing AudioStream // implementations. uint32_t bufferLimit = FramesToBytes(aRate); NS_ABORT_IF_FALSE(bufferLimit % mBytesPerFrame == 0, "Must buffer complete frames"); mBuffer.SetCapacity(bufferLimit); return NS_OK; }
nsresult nsBufferedAudioStream::Init(int32_t aNumChannels, int32_t aRate, const dom::AudioChannelType aAudioChannelType) { cubeb* cubebContext = GetCubebContext(); if (!cubebContext || aNumChannels < 0 || aRate < 0) { return NS_ERROR_FAILURE; } mRate = aRate; mChannels = aNumChannels; cubeb_stream_params params; params.rate = aRate; params.channels = aNumChannels; if (AUDIO_OUTPUT_FORMAT == AUDIO_FORMAT_S16) { params.format = CUBEB_SAMPLE_S16NE; } else { params.format = CUBEB_SAMPLE_FLOAT32NE; } mBytesPerFrame = sizeof(AudioDataValue) * aNumChannels; { cubeb_stream* stream; if (cubeb_stream_init(cubebContext, &stream, "nsBufferedAudioStream", params, GetCubebLatency(), DataCallback_S, StateCallback_S, this) == CUBEB_OK) { mCubebStream.own(stream); } } if (!mCubebStream) { return NS_ERROR_FAILURE; } // Size mBuffer for one second of audio. This value is arbitrary, and was // selected based on the observed behaviour of the existing AudioStream // implementations. uint32_t bufferLimit = aRate * mBytesPerFrame; NS_ABORT_IF_FALSE(bufferLimit % mBytesPerFrame == 0, "Must buffer complete frames"); mBuffer.SetCapacity(bufferLimit); return NS_OK; }