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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CrossGraphPort.h"
#include "AudioDeviceInfo.h"
#include "AudioStreamTrack.h"
#include "MediaTrackGraph.h"
#include "mozilla/Logging.h"
#include "mozilla/Preferences.h"
namespace mozilla {
#ifdef LOG
# undef LOG
#endif
#ifdef LOG_TEST
# undef LOG_TEST
#endif
extern LazyLogModule gMediaTrackGraphLog;
#define LOG(type, msg) MOZ_LOG(gMediaTrackGraphLog, type, msg)
#define LOG_TEST(type) MOZ_LOG_TEST(gMediaTrackGraphLog, type)
UniquePtr<CrossGraphPort> CrossGraphPort::Connect(
const RefPtr<dom::AudioStreamTrack>& aStreamTrack,
MediaTrackGraph* aPartnerGraph) {
MOZ_ASSERT(aStreamTrack);
MOZ_ASSERT(aPartnerGraph);
if (aStreamTrack->Graph() == aPartnerGraph) {
// Primary graph the same as partner graph, just remove the existing cross
// graph connection
return nullptr;
}
RefPtr<CrossGraphReceiver> receiver = aPartnerGraph->CreateCrossGraphReceiver(
aStreamTrack->Graph()->GraphRate());
RefPtr<CrossGraphTransmitter> transmitter =
aStreamTrack->Graph()->CreateCrossGraphTransmitter(receiver);
RefPtr<MediaInputPort> port =
aStreamTrack->ForwardTrackContentsTo(transmitter);
return WrapUnique(new CrossGraphPort(std::move(port), std::move(transmitter),
std::move(receiver)));
}
CrossGraphPort::~CrossGraphPort() {
mTransmitter->Destroy();
mReceiver->Destroy();
mTransmitterPort->Destroy();
}
/** CrossGraphTransmitter **/
CrossGraphTransmitter::CrossGraphTransmitter(
TrackRate aSampleRate, RefPtr<CrossGraphReceiver> aReceiver)
: ProcessedMediaTrack(aSampleRate, MediaSegment::AUDIO,
nullptr /* aSegment */),
mReceiver(std::move(aReceiver)) {}
void CrossGraphTransmitter::ProcessInput(GraphTime aFrom, GraphTime aTo,
uint32_t aFlags) {
MOZ_ASSERT(!mInputs.IsEmpty());
MOZ_ASSERT(mDisabledMode == DisabledTrackMode::ENABLED);
MediaTrack* input = mInputs[0]->GetSource();
if (input->Ended() &&
(input->GetEnd() <= input->GraphTimeToTrackTimeWithBlocking(aFrom))) {
mEnded = true;
return;
}
LOG(LogLevel::Verbose,
("Transmitter (%p) from %" PRId64 ", to %" PRId64 ", ticks %" PRId64 "",
this, aFrom, aTo, aTo - aFrom));
AudioSegment audio;
GraphTime next;
for (GraphTime t = aFrom; t < aTo; t = next) {
MediaInputPort::InputInterval interval =
MediaInputPort::GetNextInputInterval(mInputs[0], t);
interval.mEnd = std::min(interval.mEnd, aTo);
TrackTime ticks = interval.mEnd - interval.mStart;
next = interval.mEnd;
if (interval.mStart >= interval.mEnd) {
break;
}
if (interval.mInputIsBlocked) {
audio.AppendNullData(ticks);
} else if (input->IsSuspended()) {
audio.AppendNullData(ticks);
} else {
MOZ_ASSERT(GetEnd() == GraphTimeToTrackTimeWithBlocking(interval.mStart),
"Samples missing");
TrackTime inputStart =
input->GraphTimeToTrackTimeWithBlocking(interval.mStart);
TrackTime inputEnd =
input->GraphTimeToTrackTimeWithBlocking(interval.mEnd);
audio.AppendSlice(*input->GetData(), inputStart, inputEnd);
}
}
mStartTime = aTo;
for (AudioSegment::ChunkIterator iter(audio); !iter.IsEnded(); iter.Next()) {
(void)mReceiver->EnqueueAudio(*iter);
}
}
/** CrossGraphReceiver **/
CrossGraphReceiver::CrossGraphReceiver(TrackRate aSampleRate,
TrackRate aTransmitterRate)
: ProcessedMediaTrack(aSampleRate, MediaSegment::AUDIO,
static_cast<MediaSegment*>(new AudioSegment())),
mDriftCorrection(aTransmitterRate, aSampleRate, PRINCIPAL_HANDLE_NONE) {}
uint32_t CrossGraphReceiver::NumberOfChannels() const {
return GetData<AudioSegment>()->MaxChannelCount();
}
void CrossGraphReceiver::ProcessInput(GraphTime aFrom, GraphTime aTo,
uint32_t aFlags) {
LOG(LogLevel::Verbose,
("Receiver (%p) mSegment: duration: %" PRId64 ", from %" PRId64
", to %" PRId64 ", ticks %" PRId64 "",
this, mSegment->GetDuration(), aFrom, aTo, aTo - aFrom));
AudioSegment transmittedAudio;
while (mCrossThreadFIFO.AvailableRead()) {
AudioChunk chunk;
(void)mCrossThreadFIFO.Dequeue(&chunk, 1);
transmittedAudio.AppendAndConsumeChunk(std::move(chunk));
mTransmitterHasStarted = true;
}
if (mTransmitterHasStarted) {
// If it does not have enough frames the result will be silence.
AudioSegment audioCorrected =
mDriftCorrection.RequestFrames(transmittedAudio, aTo - aFrom);
if (LOG_TEST(LogLevel::Verbose) && audioCorrected.IsNull()) {
LOG(LogLevel::Verbose,
("Receiver(%p): Silence has been added, not enough input", this));
}
mSegment->AppendFrom(&audioCorrected);
} else {
mSegment->AppendNullData(aTo - aFrom);
}
}
int CrossGraphReceiver::EnqueueAudio(AudioChunk& aChunk) {
// This will take place on transmitter graph thread only.
return mCrossThreadFIFO.Enqueue(aChunk);
}
} // namespace mozilla
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