Files
platform-external-webrtc/webrtc/modules/video_coding/main/source/codec_timer.h
wuchengli@chromium.org 30377c7f71 Change the parameters of calculating maximum decode time.
- Reduce the window size from 20 to 10 seconds. If there is
  any spurious high decode time, it will be faster to pass it.
- Ignore more samples at first because HW decoder has higher
  initialization latency.

BUG=crbug.com/298176
TEST=Run apprtc loopback on Chromebook Daisy.
R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2315005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4874 4adac7df-926f-26a2-2b94-8c16560cd09d
2013-09-28 06:06:18 +00:00

63 lines
1.7 KiB
C++

/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_VIDEO_CODING_CODEC_TIMER_H_
#define WEBRTC_MODULES_VIDEO_CODING_CODEC_TIMER_H_
#include "webrtc/modules/interface/module_common_types.h"
#include "webrtc/typedefs.h"
namespace webrtc
{
// MAX_HISTORY_SIZE * SHORT_FILTER_MS defines the window size in milliseconds
#define MAX_HISTORY_SIZE 10
#define SHORT_FILTER_MS 1000
class VCMShortMaxSample
{
public:
VCMShortMaxSample() : shortMax(0), timeMs(-1) {};
int32_t shortMax;
int64_t timeMs;
};
class VCMCodecTimer
{
public:
VCMCodecTimer();
// Updates and returns the max filtered decode time.
int32_t StopTimer(int64_t startTimeMs, int64_t nowMs);
// Empty the list of timers.
void Reset();
// Get the required decode time in ms.
int32_t RequiredDecodeTimeMs(FrameType frameType) const;
private:
void UpdateMaxHistory(int32_t decodeTime, int64_t now);
void MaxFilter(int32_t newTime, int64_t nowMs);
void ProcessHistory(int64_t nowMs);
int32_t _filteredMax;
// The number of samples ignored so far.
int32_t _ignoredSampleCount;
int32_t _shortMax;
VCMShortMaxSample _history[MAX_HISTORY_SIZE];
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_CODING_CODEC_TIMER_H_