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1 /* | 1 /* |
2 * Copyright 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright 2016 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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40 | 40 |
41 // Sets the desired bitrate in bps (bits per second). | 41 // Sets the desired bitrate in bps (bits per second). |
42 // Should be called at least once before Update. | 42 // Should be called at least once before Update. |
43 void SetTargetBitrateBps(uint32_t bitrate_bps); | 43 void SetTargetBitrateBps(uint32_t bitrate_bps); |
44 uint32_t GetTargetBitrateBps() const; | 44 uint32_t GetTargetBitrateBps() const; |
45 | 45 |
46 // Returns the adjusted bitrate in bps. | 46 // Returns the adjusted bitrate in bps. |
47 uint32_t GetAdjustedBitrateBps() const; | 47 uint32_t GetAdjustedBitrateBps() const; |
48 | 48 |
49 // Returns what we think the current bitrate is. | 49 // Returns what we think the current bitrate is. |
50 uint32_t GetEstimatedBitrateBps(); | 50 rtc::Optional<uint32_t> GetEstimatedBitrateBps(); |
51 | 51 |
52 // This should be called after each frame is encoded. The timestamp at which | 52 // This should be called after each frame is encoded. The timestamp at which |
53 // it is called is used to estimate the output bitrate of the encoder. | 53 // it is called is used to estimate the output bitrate of the encoder. |
54 // Should be called from only one thread. | 54 // Should be called from only one thread. |
55 void Update(size_t frame_size); | 55 void Update(size_t frame_size); |
56 | 56 |
57 private: | 57 private: |
58 // Returns true if the bitrate is within kBitrateTolerancePct of bitrate_bps. | 58 // Returns true if the bitrate is within kBitrateTolerancePct of bitrate_bps. |
59 bool IsWithinTolerance(uint32_t bitrate_bps, uint32_t target_bitrate_bps); | 59 bool IsWithinTolerance(uint32_t bitrate_bps, uint32_t target_bitrate_bps); |
60 | 60 |
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80 RateStatistics bitrate_tracker_ GUARDED_BY(crit_); | 80 RateStatistics bitrate_tracker_ GUARDED_BY(crit_); |
81 // The last time we tried to adjust the bitrate. | 81 // The last time we tried to adjust the bitrate. |
82 uint32_t last_bitrate_update_time_ms_ GUARDED_BY(crit_); | 82 uint32_t last_bitrate_update_time_ms_ GUARDED_BY(crit_); |
83 // The number of frames since the last time we tried to adjust the bitrate. | 83 // The number of frames since the last time we tried to adjust the bitrate. |
84 uint32_t frames_since_last_update_ GUARDED_BY(crit_); | 84 uint32_t frames_since_last_update_ GUARDED_BY(crit_); |
85 }; | 85 }; |
86 | 86 |
87 } // namespace webrtc | 87 } // namespace webrtc |
88 | 88 |
89 #endif // WEBRTC_COMMON_VIDEO_INCLUDE_BITRATE_ADJUSTER_H_ | 89 #endif // WEBRTC_COMMON_VIDEO_INCLUDE_BITRATE_ADJUSTER_H_ |
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