9d3ab61325
Trying to submit all changes at once proved impossible since there were too many changes in too many files. The changes to PRESUBMIT.py will be uploaded in the last CL. (original CL: https://codereview.webrtc.org/1528503003/) BUG=webrtc:5309 TBR=mflodman@webrtc.org Review URL: https://codereview.webrtc.org/1543503002 Cr-Commit-Position: refs/heads/master@{#11102}
68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_VIDEO_CODING_INTER_FRAME_DELAY_H_
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#define WEBRTC_MODULES_VIDEO_CODING_INTER_FRAME_DELAY_H_
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#include "webrtc/typedefs.h"
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namespace webrtc {
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class VCMInterFrameDelay {
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public:
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explicit VCMInterFrameDelay(int64_t currentWallClock);
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// Resets the estimate. Zeros are given as parameters.
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void Reset(int64_t currentWallClock);
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// Calculates the delay of a frame with the given timestamp.
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// This method is called when the frame is complete.
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//
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// Input:
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// - timestamp : RTP timestamp of a received frame
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// - *delay : Pointer to memory where the result should be
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// stored
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// - currentWallClock : The current time in milliseconds.
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// Should be -1 for normal operation, only used
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// for testing.
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// Return value : true if OK, false when reordered timestamps
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bool CalculateDelay(uint32_t timestamp,
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int64_t* delay,
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int64_t currentWallClock);
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// Returns the current difference between incoming timestamps
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//
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// Return value : Wrap-around compensated difference between
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// incoming
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// timestamps.
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uint32_t CurrentTimeStampDiffMs() const;
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private:
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// Controls if the RTP timestamp counter has had a wrap around
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// between the current and the previously received frame.
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//
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// Input:
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// - timestmap : RTP timestamp of the current frame.
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void CheckForWrapArounds(uint32_t timestamp);
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int64_t _zeroWallClock; // Local timestamp of the first video packet received
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int32_t _wrapArounds; // Number of wrapArounds detected
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// The previous timestamp passed to the delay estimate
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uint32_t _prevTimestamp;
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// The previous wall clock timestamp used by the delay estimate
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int64_t _prevWallClock;
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// Wrap-around compensated difference between incoming timestamps
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int64_t _dTS;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_VIDEO_CODING_INTER_FRAME_DELAY_H_
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