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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* 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 "AudioStreamTrack.h"
#include "MediaTrackGraph.h"
#include "nsContentUtils.h"
extern mozilla::LazyLogModule gMediaStreamTrackLog;
#define LOG(type, msg) MOZ_LOG(gMediaStreamTrackLog, type, msg)
namespace mozilla::dom {
RefPtr<GenericPromise> AudioStreamTrack::AddAudioOutput(
void* aKey, AudioDeviceInfo* aSink) {
if (Ended()) {
return GenericPromise::CreateAndResolve(true, __func__);
}
mTrack->AddAudioOutput(aKey, aSink);
return mTrack->Graph()->NotifyWhenDeviceStarted(aSink);
}
void AudioStreamTrack::RemoveAudioOutput(void* aKey) {
if (Ended()) {
return;
}
mTrack->RemoveAudioOutput(aKey);
}
void AudioStreamTrack::SetAudioOutputVolume(void* aKey, float aVolume) {
if (Ended()) {
return;
}
mTrack->SetAudioOutputVolume(aKey, aVolume);
}
already_AddRefed<MediaInputPort> AudioStreamTrack::AddConsumerPort(
ProcessedMediaTrack* aTrack) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mTrack == Ended());
if (!mTrack || !aTrack || aTrack->IsDestroyed()) {
LOG(LogLevel::Warning,
("AudioStreamTrack %p cannot forward contents: track ended or "
"data/destination track ended/destroyed",
this));
return nullptr;
}
MOZ_ASSERT(!mTrack->IsDestroyed());
if (mTrack->Graph() == aTrack->Graph()) {
return ForwardTrackContentsTo(aTrack);
}
LOG(LogLevel::Verbose,
("AudioStreamTrack %p forwarding cross-graph contents from track %p "
"(graph %p) to track %p (graph %p)",
this, mTrack.get(), mTrack->Graph(), aTrack, aTrack->Graph()));
// Route audio from mTrack through a cross-graph transmitter and receiver to
// aTrack.
MediaTrackGraph* rcvrGraph = aTrack->Graph();
// Find existing connection for this graph
for (auto& conn : mCrossGraphs) {
if (conn.mPort->mReceiver->Graph() == rcvrGraph) {
conn.mRefCount++;
LOG(LogLevel::Verbose,
("AudioStreamTrack %p reusing cross-graph port "
"to graph %p (rate %u), refcount now %zu",
this, rcvrGraph, rcvrGraph->GraphRate(), conn.mRefCount));
return aTrack->AllocateInputPort(conn.mPort->mReceiver);
}
}
// Create new connection if none exists
LOG(LogLevel::Verbose,
("AudioStreamTrack %p creating cross-graph port to graph %p (rate %u)",
this, rcvrGraph, rcvrGraph->GraphRate()));
CrossGraphConnection* conn = mCrossGraphs.AppendElement(
CrossGraphConnection(CrossGraphPort::Connect(RefPtr{this}, rcvrGraph)));
return aTrack->AllocateInputPort(conn->mPort->mReceiver);
}
void AudioStreamTrack::RemoveConsumerPort(MediaInputPort* aPort) {
MOZ_ASSERT(NS_IsMainThread());
if (!aPort) {
return;
}
MediaTrackGraph* receiverGraph = aPort->Graph();
// Decrement refcount for this graph's connection and remove if it reaches 0
for (size_t i = 0; i < mCrossGraphs.Length(); ++i) {
auto& conn = mCrossGraphs[i];
if (conn.mPort->mReceiver->Graph() == receiverGraph) {
MOZ_ASSERT(conn.mRefCount > 0);
--conn.mRefCount;
LOG(LogLevel::Verbose,
("AudioStreamTrack %p decrementing cross-graph port refcount to "
"graph %p (rate %u), refcount now %zu",
this, receiverGraph, receiverGraph->GraphRate(), conn.mRefCount));
if (conn.mRefCount == 0) {
LOG(LogLevel::Verbose,
("AudioStreamTrack %p removing cross-graph forwarding to graph %p "
"(rate %u)",
this, receiverGraph, receiverGraph->GraphRate()));
mCrossGraphs.UnorderedRemoveElementAt(i);
}
return;
}
}
}
void AudioStreamTrack::GetLabel(nsAString& aLabel, CallerType aCallerType) {
MediaStreamTrack::GetLabel(aLabel, aCallerType);
}
already_AddRefed<MediaStreamTrack> AudioStreamTrack::Clone() {
return MediaStreamTrack::CloneInternal<AudioStreamTrack>();
}
void AudioStreamTrack::SetReadyState(MediaStreamTrackState aState) {
MOZ_ASSERT(NS_IsMainThread());
// When transitioning from Live to Ended, mTrack will be destroyed. Since
// mTrack is the source for cross-graph data forwarding, keeping cross-graph
// ports is unnecessary. Clearing them here ensures all related connections
// are properly disconnected and prevents an assertion failure in
// CrossGraphTransmitters::ProcessInput due to a missing source.
//
// This state transition may occur in various situations, such as when the
// track is stopped by a user action, or when mTrack is ended during its
// ProcessInput (because its source has ended), which is then detected by
// MediaTrackGraph and ultimately notifies the ended-signal via MTGListener,
// reaching this point.
if (!mCrossGraphs.IsEmpty() && aState == MediaStreamTrackState::Ended) {
MOZ_ASSERT(!Ended());
LOG(LogLevel::Verbose,
("AudioStreamTrack %p ending, destroying %zu cross-graph ports", this,
mCrossGraphs.Length()));
mCrossGraphs.Clear();
}
MediaStreamTrack::SetReadyState(aState);
}
} // namespace mozilla::dom
#undef LOG
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