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-rw-r--r--dom/media/CrossGraphPort.cpp205
1 files changed, 205 insertions, 0 deletions
diff --git a/dom/media/CrossGraphPort.cpp b/dom/media/CrossGraphPort.cpp
new file mode 100644
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--- /dev/null
+++ b/dom/media/CrossGraphPort.cpp
@@ -0,0 +1,205 @@
+/* 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 "MediaTrackGraphImpl.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, AudioDeviceInfo* aSink,
+ nsPIDOMWindowInner* aWindow) {
+ MOZ_ASSERT(aSink);
+ MOZ_ASSERT(aStreamTrack);
+ uint32_t defaultRate;
+ aSink->GetDefaultRate(&defaultRate);
+ LOG(LogLevel::Debug,
+ ("CrossGraphPort::Connect: sink id: %p at rate %u, primary rate %d",
+ aSink->DeviceID(), defaultRate, aStreamTrack->Graph()->GraphRate()));
+
+ if (!aSink->DeviceID()) {
+ return nullptr;
+ }
+
+ MediaTrackGraph* newGraph =
+ MediaTrackGraph::GetInstance(MediaTrackGraph::AUDIO_THREAD_DRIVER,
+ aWindow, defaultRate, aSink->DeviceID());
+
+ return CrossGraphPort::Connect(aStreamTrack, newGraph);
+}
+
+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)));
+}
+
+void CrossGraphPort::AddAudioOutput(void* aKey) {
+ mReceiver->AddAudioOutput(aKey);
+}
+
+void CrossGraphPort::RemoveAudioOutput(void* aKey) {
+ mReceiver->RemoveAudioOutput(aKey);
+}
+
+void CrossGraphPort::SetAudioOutputVolume(void* aKey, float aVolume) {
+ mReceiver->SetAudioOutputVolume(aKey, aVolume);
+}
+
+CrossGraphPort::~CrossGraphPort() {
+ mTransmitter->Destroy();
+ mReceiver->Destroy();
+ mTransmitterPort->Destroy();
+}
+
+RefPtr<GenericPromise> CrossGraphPort::EnsureConnected() {
+ // The primary graph is already working check the partner (receiver's) graph.
+ return mReceiver->Graph()->NotifyWhenDeviceStarted(mReceiver.get());
+}
+
+/** 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) mSegment: duration: %" PRId64 ", from %" PRId64
+ ", to %" PRId64 ", ticks %" PRId64 "",
+ this, mSegment->GetDuration(), 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()) {
+ Unused << mReceiver->EnqueueAudio(*iter);
+ }
+}
+
+/** CrossGraphReceiver **/
+
+CrossGraphReceiver::CrossGraphReceiver(TrackRate aSampleRate,
+ TrackRate aTransmitterRate)
+ : ProcessedMediaTrack(aSampleRate, MediaSegment::AUDIO,
+ static_cast<MediaSegment*>(new AudioSegment())),
+ mDriftCorrection(aTransmitterRate, aSampleRate,
+ Preferences::GetInt("media.clockdrift.buffering", 50),
+ 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;
+ Unused << 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