git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d

2011-05-30 11:22:19 +00:00
parent 01813fe945
commit 77ae29bc81
1153 changed files with 404089 additions and 0 deletions
--- a/modules/video_coding/main/source/timestamp_extrapolator.h
+++ b/modules/video_coding/main/source/timestamp_extrapolator.h
@@ -0,0 +1,59 @@
+/*
+ *  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_TIMESTAMP_EXTRAPOLATOR_H_
+#define WEBRTC_MODULES_VIDEO_CODING_TIMESTAMP_EXTRAPOLATOR_H_
+
+#include "typedefs.h"
+#include "rw_lock_wrapper.h"
+
+namespace webrtc
+{
+
+class VCMTimestampExtrapolator
+{
+public:
+    VCMTimestampExtrapolator(WebRtc_Word32 vcmId = 0, WebRtc_Word32 receiverId = 0);
+    ~VCMTimestampExtrapolator();
+    void Update(WebRtc_Word64 tMs, WebRtc_UWord32 ts90khz, bool trace = true);
+    WebRtc_UWord32 ExtrapolateTimestamp(WebRtc_Word64 tMs) const;
+    WebRtc_Word64 ExtrapolateLocalTime(WebRtc_UWord32 timestamp90khz) const;
+    void Reset(WebRtc_Word64 nowMs = -1);
+
+private:
+    void CheckForWrapArounds(WebRtc_UWord32 ts90khz);
+    bool DelayChangeDetection(double error, bool trace = true);
+    RWLockWrapper&         _rwLock;
+    WebRtc_Word32         _vcmId;
+    WebRtc_Word32         _id;
+    bool                _trace;
+    double              _w[2];
+    double              _P[2][2];
+    WebRtc_Word64         _startMs;
+    WebRtc_Word64         _prevMs;
+    WebRtc_UWord32        _firstTimestamp;
+    WebRtc_Word32         _wrapArounds;
+    WebRtc_UWord32        _prevTs90khz;
+    const double        _lambda;
+    bool                _firstAfterReset;
+    WebRtc_UWord32        _packetCount;
+    const WebRtc_UWord32  _startUpFilterDelayInPackets;
+
+    double              _detectorAccumulatorPos;
+    double              _detectorAccumulatorNeg;
+    const double        _alarmThreshold;
+    const double        _accDrift;
+    const double        _accMaxError;
+    const double        _P11;
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_MODULES_VIDEO_CODING_TIMESTAMP_EXTRAPOLATOR_H_