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stefan@webrtc.org5f284982012-06-28 07:51:16 +00001/*
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_VIDEO_ENGINE_STREAM_SYNCHRONIZATION_H_
12#define WEBRTC_VIDEO_ENGINE_STREAM_SYNCHRONIZATION_H_
13
stefan@webrtc.org7c3523c2012-09-11 07:00:42 +000014#include <list>
15
wu@webrtc.org66773a02014-05-07 17:09:44 +000016#include "webrtc/system_wrappers/interface/rtp_to_ntp.h"
pbos@webrtc.orgf5d4cb12013-05-17 13:44:48 +000017#include "webrtc/typedefs.h"
stefan@webrtc.org5f284982012-06-28 07:51:16 +000018
19namespace webrtc {
20
21struct ViESyncDelay;
22
23class StreamSynchronization {
24 public:
25 struct Measurements {
stefan@webrtc.org7c3523c2012-09-11 07:00:42 +000026 Measurements() : rtcp(), latest_receive_time_ms(0), latest_timestamp(0) {}
wu@webrtc.org66773a02014-05-07 17:09:44 +000027 RtcpList rtcp;
stefan@webrtc.org7c3523c2012-09-11 07:00:42 +000028 int64_t latest_receive_time_ms;
29 uint32_t latest_timestamp;
stefan@webrtc.org5f284982012-06-28 07:51:16 +000030 };
31
32 StreamSynchronization(int audio_channel_id, int video_channel_id);
33 ~StreamSynchronization();
34
stefan@webrtc.org7c3523c2012-09-11 07:00:42 +000035 bool ComputeDelays(int relative_delay_ms,
36 int current_audio_delay_ms,
37 int* extra_audio_delay_ms,
38 int* total_video_delay_target_ms);
39
40 // On success |relative_delay| contains the number of milliseconds later video
41 // is rendered relative audio. If audio is played back later than video a
42 // |relative_delay| will be negative.
43 static bool ComputeRelativeDelay(const Measurements& audio_measurement,
44 const Measurements& video_measurement,
45 int* relative_delay_ms);
mikhal@webrtc.orgef9f76a2013-02-15 23:22:18 +000046 // Set target buffering delay - All audio and video will be delayed by at
47 // least target_delay_ms.
48 void SetTargetBufferingDelay(int target_delay_ms);
stefan@webrtc.org5f284982012-06-28 07:51:16 +000049
50 private:
51 ViESyncDelay* channel_delay_;
52 int audio_channel_id_;
53 int video_channel_id_;
mikhal@webrtc.orgef9f76a2013-02-15 23:22:18 +000054 int base_target_delay_ms_;
pwestin@webrtc.org63117332013-04-22 18:57:14 +000055 int avg_diff_ms_;
stefan@webrtc.org5f284982012-06-28 07:51:16 +000056};
stefan@webrtc.org5f284982012-06-28 07:51:16 +000057} // namespace webrtc
58
59#endif // WEBRTC_VIDEO_ENGINE_STREAM_SYNCHRONIZATION_H_