void
AudioNodeStream::DecrementActiveInputCount()
{
MOZ_ASSERT(mActiveInputCount > 0);
--mActiveInputCount;
CheckForInactive();
}
virtual void Run() override
{
auto ns = static_cast<AudioNodeStream*>(mStream);
ns->CheckForInactive();
}
// The MediaStreamGraph guarantees that this is actually one block, for
// AudioNodeStreams.
void
AudioNodeStream::ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags)
{
uint16_t outputCount = mLastChunks.Length();
MOZ_ASSERT(outputCount == std::max(uint16_t(1), mEngine->OutputCount()));
if (!mIsActive) {
// mLastChunks are already null.
#ifdef DEBUG
for (const auto& chunk : mLastChunks) {
MOZ_ASSERT(chunk.IsNull());
}
#endif
} else if (InMutedCycle()) {
mInputChunks.Clear();
for (uint16_t i = 0; i < outputCount; ++i) {
mLastChunks[i].SetNull(WEBAUDIO_BLOCK_SIZE);
}
} else {
// We need to generate at least one input
uint16_t maxInputs = std::max(uint16_t(1), mEngine->InputCount());
mInputChunks.SetLength(maxInputs);
for (uint16_t i = 0; i < maxInputs; ++i) {
ObtainInputBlock(mInputChunks[i], i);
}
bool finished = false;
if (mPassThrough) {
MOZ_ASSERT(outputCount == 1, "For now, we only support nodes that have one output port");
mLastChunks[0] = mInputChunks[0];
} else {
if (maxInputs <= 1 && outputCount <= 1) {
mEngine->ProcessBlock(this, aFrom,
mInputChunks[0], &mLastChunks[0], &finished);
} else {
mEngine->ProcessBlocksOnPorts(this, mInputChunks, mLastChunks, &finished);
}
}
for (uint16_t i = 0; i < outputCount; ++i) {
NS_ASSERTION(mLastChunks[i].GetDuration() == WEBAUDIO_BLOCK_SIZE,
"Invalid WebAudio chunk size");
}
if (finished) {
mMarkAsFinishedAfterThisBlock = true;
CheckForInactive();
}
if (mDisabledTrackIDs.Contains(static_cast<TrackID>(AUDIO_TRACK))) {
for (uint32_t i = 0; i < outputCount; ++i) {
mLastChunks[i].SetNull(WEBAUDIO_BLOCK_SIZE);
}
}
}
if (!mFinished) {
// Don't output anything while finished
if (mFlags & EXTERNAL_OUTPUT) {
AdvanceOutputSegment();
}
if (mMarkAsFinishedAfterThisBlock && (aFlags & ALLOW_FINISH)) {
// This stream was finished the last time that we looked at it, and all
// of the depending streams have finished their output as well, so now
// it's time to mark this stream as finished.
if (mFlags & EXTERNAL_OUTPUT) {
FinishOutput();
}
FinishOnGraphThread();
}
}
}
