void
ConvolverNode::SetBuffer(JSContext* aCx, AudioBuffer* aBuffer, ErrorResult& aRv)
{
if (aBuffer) {
switch (aBuffer->NumberOfChannels()) {
case 1:
case 2:
case 4:
// Supported number of channels
break;
default:
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
return;
}
}
mBuffer = aBuffer;
// Send the buffer to the stream
AudioNodeStream* ns = static_cast<AudioNodeStream*>(mStream.get());
MOZ_ASSERT(ns, "Why don't we have a stream here?");
if (mBuffer) {
uint32_t length = mBuffer->Length();
nsRefPtr<ThreadSharedFloatArrayBufferList> data =
mBuffer->GetThreadSharedChannelsForRate(aCx);
if (data && length < WEBAUDIO_BLOCK_SIZE) {
// For very small impulse response buffers, we need to pad the
// buffer with 0 to make sure that the Reverb implementation
// has enough data to compute FFTs from.
length = WEBAUDIO_BLOCK_SIZE;
nsRefPtr<ThreadSharedFloatArrayBufferList> paddedBuffer =
new ThreadSharedFloatArrayBufferList(data->GetChannels());
float* channelData = (float*) malloc(sizeof(float) * length * data->GetChannels());
for (uint32_t i = 0; i < data->GetChannels(); ++i) {
PodCopy(channelData + length * i, data->GetData(i), mBuffer->Length());
PodZero(channelData + length * i + mBuffer->Length(), WEBAUDIO_BLOCK_SIZE - mBuffer->Length());
paddedBuffer->SetData(i, (i == 0) ? channelData : nullptr, free, channelData);
}
data = paddedBuffer;
}
SendInt32ParameterToStream(ConvolverNodeEngine::BUFFER_LENGTH, length);
SendDoubleParameterToStream(ConvolverNodeEngine::SAMPLE_RATE,
mBuffer->SampleRate());
ns->SetBuffer(data.forget());
} else {
ns->SetBuffer(nullptr);
}
}
void
AudioDestinationNode::Unmute()
{
MOZ_ASSERT(Context() && !Context()->IsOffline());
SendDoubleParameterToStream(DestinationNodeEngine::VOLUME, 1.0f);
}
void
AudioBufferSourceNode::SendDopplerShiftToStream(double aDopplerShift)
{
SendDoubleParameterToStream(DOPPLERSHIFT, aDopplerShift);
}
void
AudioBufferSourceNode::SendDopplerShiftToStream(double aDopplerShift)
{
MOZ_ASSERT(mStream, "Should have disconnected panner if no stream");
SendDoubleParameterToStream(DOPPLERSHIFT, aDopplerShift);
}
