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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_TRACK_METRICS_H_
#define CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_TRACK_METRICS_H_
#include "base/basictypes.h"
#include "base/memory/scoped_vector.h"
#include "base/threading/non_thread_safe.h"
#include "content/common/content_export.h"
#include "third_party/libjingle/source/talk/app/webrtc/peerconnectioninterface.h"
namespace webrtc {
class MediaStreamInterface;
class MediaStreamTrackInterface;
}
namespace content {
class MediaStreamTrackMetricsObserver;
class RTCPeerConnectionHandler;
// Responsible for observing the connected lifetimes of tracks going
// over a PeerConnection, and sending messages to the browser process
// about lifetime events.
//
// There should be exactly one of these objects owned by each
// RTCPeerConnectionHandler, and its lifetime should match the
// lifetime of its owner.
class CONTENT_EXPORT MediaStreamTrackMetrics : public base::NonThreadSafe {
public:
explicit MediaStreamTrackMetrics();
~MediaStreamTrackMetrics();
enum StreamType { SENT_STREAM, RECEIVED_STREAM };
enum TrackType { AUDIO_TRACK, VIDEO_TRACK };
enum LifetimeEvent { CONNECTED, DISCONNECTED };
// Starts tracking lifetimes of all the tracks in |stream| and any
// tracks added or removed to/from the stream until |RemoveStream|
// is called or this object's lifetime ends.
void AddStream(StreamType type, webrtc::MediaStreamInterface* stream);
// Stops tracking lifetimes of tracks in |stream|.
void RemoveStream(StreamType type, webrtc::MediaStreamInterface* stream);
// Called to indicate changes in the ICE connection state for the
// PeerConnection this object is associated with. Used to generate
// the connected/disconnected lifetime events for these tracks.
void IceConnectionChange(
webrtc::PeerConnectionInterface::IceConnectionState new_state);
// Send a lifetime message to the browser process. Virtual so that
// it can be overridden in unit tests.
//
// |track_id| is the ID of the track that just got connected or
// disconnected.
//
// |is_audio| is true for an audio track, false for a video track.
//
// |start_lifetime| is true to indicate that it just got connected,
// false to indicate it is no longer connected.
//
// |is_remote| is true for remote streams (received over a
// PeerConnection), false for local streams (sent over a
// PeerConnection).
virtual void SendLifetimeMessage(const std::string& track_id,
TrackType track_type,
LifetimeEvent lifetime_event,
StreamType stream_type);
protected:
// Calls SendLifetimeMessage for |observer| depending on |ice_state_|.
void SendLifeTimeMessageDependingOnIceState(
MediaStreamTrackMetricsObserver* observer);
// Implements MakeUniqueId. |pc_id| is a cast of this object's
// |this| pointer to a 64-bit integer, which is usable as a unique
// ID for the PeerConnection this object is attached to (since there
// is a one-to-one relationship).
uint64 MakeUniqueIdImpl(uint64 pc_id,
const std::string& track,
StreamType stream_type);
private:
// Make a unique ID for the given track, that is valid while the
// track object and the PeerConnection it is attached to both exist.
uint64 MakeUniqueId(const std::string& track, StreamType stream_type);
typedef ScopedVector<MediaStreamTrackMetricsObserver> ObserverVector;
ObserverVector observers_;
webrtc::PeerConnectionInterface::IceConnectionState ice_state_;
};
} // namespace
#endif // CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_TRACK_METRICS_H_
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