1 /* 2 * Copyright (c) 2011 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_MODULES_VIDEO_CODING_CODEC_TIMER_H_ 12 #define WEBRTC_MODULES_VIDEO_CODING_CODEC_TIMER_H_ 13 14 #include "webrtc/modules/interface/module_common_types.h" 15 #include "webrtc/typedefs.h" 16 17 namespace webrtc 18 { 19 20 // MAX_HISTORY_SIZE * SHORT_FILTER_MS defines the window size in milliseconds 21 #define MAX_HISTORY_SIZE 10 22 #define SHORT_FILTER_MS 1000 23 24 class VCMShortMaxSample 25 { 26 public: 27 VCMShortMaxSample() : shortMax(0), timeMs(-1) {}; 28 29 int32_t shortMax; 30 int64_t timeMs; 31 }; 32 33 class VCMCodecTimer 34 { 35 public: 36 VCMCodecTimer(); 37 38 // Updates and returns the max filtered decode time. 39 int32_t StopTimer(int64_t startTimeMs, int64_t nowMs); 40 41 // Empty the list of timers. 42 void Reset(); 43 44 // Get the required decode time in ms. 45 int32_t RequiredDecodeTimeMs(FrameType frameType) const; 46 47 private: 48 void UpdateMaxHistory(int32_t decodeTime, int64_t now); 49 void MaxFilter(int32_t newTime, int64_t nowMs); 50 void ProcessHistory(int64_t nowMs); 51 52 int32_t _filteredMax; 53 // The number of samples ignored so far. 54 int32_t _ignoredSampleCount; 55 int32_t _shortMax; 56 VCMShortMaxSample _history[MAX_HISTORY_SIZE]; 57 58 }; 59 60 } // namespace webrtc 61 62 #endif // WEBRTC_MODULES_VIDEO_CODING_CODEC_TIMER_H_ 63
