1 /* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 2 * 3 * Use of this source code is governed by a BSD-style license 4 * that can be found in the LICENSE file in the root of the source 5 * tree. An additional intellectual property rights grant can be found 6 * in the file PATENTS. All contributing project authors may 7 * be found in the AUTHORS file in the root of the source tree. 8 */ 9 /* 10 * This file defines classes for doing temporal layers with VP8. 11 */ 12 #ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_DEFAULT_TEMPORAL_LAYERS_H_ 13 #define WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_DEFAULT_TEMPORAL_LAYERS_H_ 14 15 #include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h" 16 17 namespace webrtc { 18 19 class DefaultTemporalLayers : public TemporalLayers { 20 public: 21 DefaultTemporalLayers(int number_of_temporal_layers, 22 uint8_t initial_tl0_pic_idx); ~DefaultTemporalLayers()23 virtual ~DefaultTemporalLayers() {} 24 25 // Returns the recommended VP8 encode flags needed. May refresh the decoder 26 // and/or update the reference buffers. 27 int EncodeFlags(uint32_t timestamp) override; 28 29 bool ConfigureBitrates(int bitrate_kbit, 30 int max_bitrate_kbit, 31 int framerate, 32 vpx_codec_enc_cfg_t* cfg) override; 33 34 void PopulateCodecSpecific(bool base_layer_sync, 35 CodecSpecificInfoVP8* vp8_info, 36 uint32_t timestamp) override; 37 FrameEncoded(unsigned int size,uint32_t timestamp,int qp)38 void FrameEncoded(unsigned int size, uint32_t timestamp, int qp) override {} 39 UpdateConfiguration(vpx_codec_enc_cfg_t * cfg)40 bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) override { return false; } 41 42 int CurrentLayerId() const override; 43 44 private: 45 enum TemporalReferences { 46 // For 1 layer case: reference all (last, golden, and alt ref), but only 47 // update last. 48 kTemporalUpdateLastRefAll = 12, 49 // First base layer frame for 3 temporal layers, which updates last and 50 // golden with alt ref dependency. 51 kTemporalUpdateLastAndGoldenRefAltRef = 11, 52 // First enhancement layer with alt ref dependency. 53 kTemporalUpdateGoldenRefAltRef = 10, 54 // First enhancement layer with alt ref dependency. 55 kTemporalUpdateGoldenWithoutDependencyRefAltRef = 9, 56 // Base layer with alt ref dependency. 57 kTemporalUpdateLastRefAltRef = 8, 58 // Highest enhacement layer without dependency on golden with alt ref 59 // dependency. 60 kTemporalUpdateNoneNoRefGoldenRefAltRef = 7, 61 // Second layer and last frame in cycle, for 2 layers. 62 kTemporalUpdateNoneNoRefAltref = 6, 63 // Highest enhancement layer. 64 kTemporalUpdateNone = 5, 65 // Second enhancement layer. 66 kTemporalUpdateAltref = 4, 67 // Second enhancement layer without dependency on previous frames in 68 // the second enhancement layer. 69 kTemporalUpdateAltrefWithoutDependency = 3, 70 // First enhancement layer. 71 kTemporalUpdateGolden = 2, 72 // First enhancement layer without dependency on previous frames in 73 // the first enhancement layer. 74 kTemporalUpdateGoldenWithoutDependency = 1, 75 // Base layer. 76 kTemporalUpdateLast = 0, 77 }; 78 enum { kMaxTemporalPattern = 16 }; 79 80 int number_of_temporal_layers_; 81 int temporal_ids_length_; 82 int temporal_ids_[kMaxTemporalPattern]; 83 int temporal_pattern_length_; 84 TemporalReferences temporal_pattern_[kMaxTemporalPattern]; 85 uint8_t tl0_pic_idx_; 86 uint8_t pattern_idx_; 87 uint32_t timestamp_; 88 bool last_base_layer_sync_; 89 }; 90 91 } // namespace webrtc 92 #endif // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_DEFAULT_TEMPORAL_LAYERS_H_ 93