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/* -*- Mode: C++; tab-width: 8; 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/. */
#ifndef OutputStreamManager_h
#define OutputStreamManager_h
#include "mozilla/RefPtr.h"
#include "nsTArray.h"
#include "MediaSegment.h"
namespace mozilla {
class MediaInputPort;
class MediaStream;
class MediaStreamGraph;
class OutputStreamManager;
class ProcessedMediaStream;
class OutputStreamData {
public:
~OutputStreamData();
void Init(OutputStreamManager* aOwner,
ProcessedMediaStream* aStream,
TrackID aNextAvailableTrackID);
// Connect the given input stream's audio and video tracks to mStream.
// Return false is mStream is already destroyed, otherwise true.
bool Connect(MediaStream* aStream, TrackID aAudioTrackID, TrackID aVideoTrackID);
// Disconnect mStream from its input stream.
// Return false is mStream is already destroyed, otherwise true.
bool Disconnect();
// Return true if aStream points to the same object as mStream.
// Used by OutputStreamManager to remove an output stream.
bool Equals(MediaStream* aStream) const;
// Return the graph mStream belongs to.
MediaStreamGraph* Graph() const;
// The next TrackID that will not cause a collision in mStream.
TrackID NextAvailableTrackID() const;
private:
OutputStreamManager* mOwner;
RefPtr<ProcessedMediaStream> mStream;
// mPort connects an input stream to our mStream.
nsTArray<RefPtr<MediaInputPort>> mPorts;
// For guaranteeing TrackID uniqueness in our mStream.
TrackID mNextAvailableTrackID = TRACK_INVALID;
};
class OutputStreamManager {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(OutputStreamManager);
public:
// Add the output stream to the collection.
void Add(ProcessedMediaStream* aStream,
TrackID aNextAvailableTrackID,
bool aFinishWhenEnded);
// Remove the output stream from the collection.
void Remove(MediaStream* aStream);
// Clear all output streams from the collection.
void Clear();
// The next TrackID that will not cause a collision in aOutputStream.
TrackID NextAvailableTrackIDFor(MediaStream* aOutputStream) const;
// Return true if the collection empty.
bool IsEmpty() const
{
MOZ_ASSERT(NS_IsMainThread());
return mStreams.IsEmpty();
}
// Connect the given input stream's tracks to all output streams.
void Connect(MediaStream* aStream,
TrackID aAudioTrackID,
TrackID aVideoTrackID);
// Disconnect the input stream to all output streams.
void Disconnect();
// Return the graph these streams belong to or null if empty.
MediaStreamGraph* Graph() const
{
MOZ_ASSERT(NS_IsMainThread());
return !IsEmpty() ? mStreams[0].Graph() : nullptr;
}
private:
~OutputStreamManager() {}
// Keep the input stream so we can connect the output streams that
// are added after Connect().
RefPtr<MediaStream> mInputStream;
TrackID mInputAudioTrackID = TRACK_INVALID;
TrackID mInputVideoTrackID = TRACK_INVALID;
nsTArray<OutputStreamData> mStreams;
};
} // namespace mozilla
#endif // OutputStreamManager_h
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