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1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 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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23 | 23 |
24 struct VCMResolutionScale { | 24 struct VCMResolutionScale { |
25 VCMResolutionScale() | 25 VCMResolutionScale() |
26 : codec_width(640), | 26 : codec_width(640), |
27 codec_height(480), | 27 codec_height(480), |
28 frame_rate(30.0f), | 28 frame_rate(30.0f), |
29 spatial_width_fact(1.0f), | 29 spatial_width_fact(1.0f), |
30 spatial_height_fact(1.0f), | 30 spatial_height_fact(1.0f), |
31 temporal_fact(1.0f), | 31 temporal_fact(1.0f), |
32 change_resolution_spatial(false), | 32 change_resolution_spatial(false), |
33 change_resolution_temporal(false) { | 33 change_resolution_temporal(false) {} |
34 } | |
35 uint16_t codec_width; | 34 uint16_t codec_width; |
36 uint16_t codec_height; | 35 uint16_t codec_height; |
37 float frame_rate; | 36 float frame_rate; |
38 float spatial_width_fact; | 37 float spatial_width_fact; |
39 float spatial_height_fact; | 38 float spatial_height_fact; |
40 float temporal_fact; | 39 float temporal_fact; |
41 bool change_resolution_spatial; | 40 bool change_resolution_spatial; |
42 bool change_resolution_temporal; | 41 bool change_resolution_temporal; |
43 }; | 42 }; |
44 | 43 |
45 enum ImageType { | 44 enum ImageType { |
46 kQCIF = 0, // 176x144 | 45 kQCIF = 0, // 176x144 |
47 kHCIF, // 264x216 = half(~3/4x3/4) CIF. | 46 kHCIF, // 264x216 = half(~3/4x3/4) CIF. |
48 kQVGA, // 320x240 = quarter VGA. | 47 kQVGA, // 320x240 = quarter VGA. |
49 kCIF, // 352x288 | 48 kCIF, // 352x288 |
50 kHVGA, // 480x360 = half(~3/4x3/4) VGA. | 49 kHVGA, // 480x360 = half(~3/4x3/4) VGA. |
51 kVGA, // 640x480 | 50 kVGA, // 640x480 |
52 kQFULLHD, // 960x540 = quarter FULLHD, and half(~3/4x3/4) WHD. | 51 kQFULLHD, // 960x540 = quarter FULLHD, and half(~3/4x3/4) WHD. |
53 kWHD, // 1280x720 | 52 kWHD, // 1280x720 |
54 kFULLHD, // 1920x1080 | 53 kFULLHD, // 1920x1080 |
55 kNumImageTypes | 54 kNumImageTypes |
56 }; | 55 }; |
57 | 56 |
58 const uint32_t kSizeOfImageType[kNumImageTypes] = | 57 const uint32_t kSizeOfImageType[kNumImageTypes] = { |
59 { 25344, 57024, 76800, 101376, 172800, 307200, 518400, 921600, 2073600 }; | 58 25344, 57024, 76800, 101376, 172800, 307200, 518400, 921600, 2073600}; |
60 | 59 |
61 enum FrameRateLevelClass { | 60 enum FrameRateLevelClass { |
62 kFrameRateLow, | 61 kFrameRateLow, |
63 kFrameRateMiddle1, | 62 kFrameRateMiddle1, |
64 kFrameRateMiddle2, | 63 kFrameRateMiddle2, |
65 kFrameRateHigh | 64 kFrameRateHigh |
66 }; | 65 }; |
67 | 66 |
68 enum ContentLevelClass { | 67 enum ContentLevelClass { kLow, kHigh, kDefault }; |
69 kLow, | |
70 kHigh, | |
71 kDefault | |
72 }; | |
73 | 68 |
74 struct VCMContFeature { | 69 struct VCMContFeature { |
75 VCMContFeature() | 70 VCMContFeature() : value(0.0f), level(kDefault) {} |
76 : value(0.0f), | |
77 level(kDefault) { | |
78 } | |
79 void Reset() { | 71 void Reset() { |
80 value = 0.0f; | 72 value = 0.0f; |
81 level = kDefault; | 73 level = kDefault; |
82 } | 74 } |
83 float value; | 75 float value; |
84 ContentLevelClass level; | 76 ContentLevelClass level; |
85 }; | 77 }; |
86 | 78 |
87 enum UpDownAction { | 79 enum UpDownAction { kUpResolution, kDownResolution }; |
88 kUpResolution, | |
89 kDownResolution | |
90 }; | |
91 | 80 |
92 enum SpatialAction { | 81 enum SpatialAction { |
93 kNoChangeSpatial, | 82 kNoChangeSpatial, |
94 kOneHalfSpatialUniform, // 3/4 x 3/4: 9/6 ~1/2 pixel reduction. | 83 kOneHalfSpatialUniform, // 3/4 x 3/4: 9/6 ~1/2 pixel reduction. |
95 kOneQuarterSpatialUniform, // 1/2 x 1/2: 1/4 pixel reduction. | 84 kOneQuarterSpatialUniform, // 1/2 x 1/2: 1/4 pixel reduction. |
96 kNumModesSpatial | 85 kNumModesSpatial |
97 }; | 86 }; |
98 | 87 |
99 enum TemporalAction { | 88 enum TemporalAction { |
100 kNoChangeTemporal, | 89 kNoChangeTemporal, |
101 kTwoThirdsTemporal, // 2/3 frame rate reduction | 90 kTwoThirdsTemporal, // 2/3 frame rate reduction |
102 kOneHalfTemporal, // 1/2 frame rate reduction | 91 kOneHalfTemporal, // 1/2 frame rate reduction |
103 kNumModesTemporal | 92 kNumModesTemporal |
104 }; | 93 }; |
105 | 94 |
106 struct ResolutionAction { | 95 struct ResolutionAction { |
107 ResolutionAction() | 96 ResolutionAction() : spatial(kNoChangeSpatial), temporal(kNoChangeTemporal) {} |
108 : spatial(kNoChangeSpatial), | |
109 temporal(kNoChangeTemporal) { | |
110 } | |
111 SpatialAction spatial; | 97 SpatialAction spatial; |
112 TemporalAction temporal; | 98 TemporalAction temporal; |
113 }; | 99 }; |
114 | 100 |
115 // Down-sampling factors for spatial (width and height), and temporal. | 101 // Down-sampling factors for spatial (width and height), and temporal. |
116 const float kFactorWidthSpatial[kNumModesSpatial] = | 102 const float kFactorWidthSpatial[kNumModesSpatial] = {1.0f, 4.0f / 3.0f, 2.0f}; |
117 { 1.0f, 4.0f / 3.0f, 2.0f }; | |
118 | 103 |
119 const float kFactorHeightSpatial[kNumModesSpatial] = | 104 const float kFactorHeightSpatial[kNumModesSpatial] = {1.0f, 4.0f / 3.0f, 2.0f}; |
120 { 1.0f, 4.0f / 3.0f, 2.0f }; | |
121 | 105 |
122 const float kFactorTemporal[kNumModesTemporal] = | 106 const float kFactorTemporal[kNumModesTemporal] = {1.0f, 1.5f, 2.0f}; |
123 { 1.0f, 1.5f, 2.0f }; | |
124 | 107 |
125 enum EncoderState { | 108 enum EncoderState { |
126 kStableEncoding, // Low rate mis-match, stable buffer levels. | 109 kStableEncoding, // Low rate mis-match, stable buffer levels. |
127 kStressedEncoding, // Significant over-shooting of target rate, | 110 kStressedEncoding, // Significant over-shooting of target rate, |
128 // Buffer under-flow, etc. | 111 // Buffer under-flow, etc. |
129 kEasyEncoding // Significant under-shooting of target rate. | 112 kEasyEncoding // Significant under-shooting of target rate. |
130 }; | 113 }; |
131 | 114 |
132 // QmMethod class: main class for resolution and robustness settings | 115 // QmMethod class: main class for resolution and robustness settings |
133 | 116 |
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290 // Check constraints on the amount of down-sampling allowed. | 273 // Check constraints on the amount of down-sampling allowed. |
291 void ConstrainAmountOfDownSampling(); | 274 void ConstrainAmountOfDownSampling(); |
292 | 275 |
293 // For going up in resolution: pick spatial or temporal action, | 276 // For going up in resolution: pick spatial or temporal action, |
294 // if both actions were separately selected. | 277 // if both actions were separately selected. |
295 void PickSpatialOrTemporal(); | 278 void PickSpatialOrTemporal(); |
296 | 279 |
297 // Select the directional (1x2 or 2x1) spatial down-sampling action. | 280 // Select the directional (1x2 or 2x1) spatial down-sampling action. |
298 void SelectSpatialDirectionMode(float transition_rate); | 281 void SelectSpatialDirectionMode(float transition_rate); |
299 | 282 |
300 enum { kDownActionHistorySize = 10}; | 283 enum { kDownActionHistorySize = 10 }; |
301 | 284 |
302 VCMResolutionScale* qm_; | 285 VCMResolutionScale* qm_; |
303 // Encoder rate control parameters. | 286 // Encoder rate control parameters. |
304 float target_bitrate_; | 287 float target_bitrate_; |
305 float incoming_framerate_; | 288 float incoming_framerate_; |
306 float per_frame_bandwidth_; | 289 float per_frame_bandwidth_; |
307 float buffer_level_; | 290 float buffer_level_; |
308 | 291 |
309 // Data accumulated every ~1sec from MediaOpt. | 292 // Data accumulated every ~1sec from MediaOpt. |
310 float sum_target_rate_; | 293 float sum_target_rate_; |
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364 | 347 |
365 private: | 348 private: |
366 // Previous state of network parameters. | 349 // Previous state of network parameters. |
367 float prev_total_rate_; | 350 float prev_total_rate_; |
368 int64_t prev_rtt_time_; | 351 int64_t prev_rtt_time_; |
369 uint8_t prev_packet_loss_; | 352 uint8_t prev_packet_loss_; |
370 uint8_t prev_code_rate_delta_; | 353 uint8_t prev_code_rate_delta_; |
371 }; | 354 }; |
372 } // namespace webrtc | 355 } // namespace webrtc |
373 #endif // WEBRTC_MODULES_VIDEO_CODING_QM_SELECT_H_ | 356 #endif // WEBRTC_MODULES_VIDEO_CODING_QM_SELECT_H_ |
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