1 /* 2 * Copyright (c) 2019, Alliance for Open Media. 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 AOM_AV1_ENCODER_SVC_LAYERCONTEXT_H_ 12 #define AOM_AV1_ENCODER_SVC_LAYERCONTEXT_H_ 13 14 #include "av1/encoder/aq_cyclicrefresh.h" 15 #include "av1/encoder/encoder.h" 16 #include "av1/encoder/ratectrl.h" 17 18 #ifdef __cplusplus 19 extern "C" { 20 #endif 21 22 typedef struct { 23 RATE_CONTROL rc; 24 int framerate_factor; 25 int64_t layer_target_bitrate; 26 int scaling_factor_num; 27 int scaling_factor_den; 28 int64_t target_bandwidth; 29 int64_t spatial_layer_target_bandwidth; 30 double framerate; 31 int avg_frame_size; 32 int max_q; 33 int min_q; 34 int frames_from_key_frame; 35 // Cyclic refresh parameters (aq-mode=3), that need to be updated per-frame. 36 int sb_index; 37 int8_t *map; 38 uint8_t *last_coded_q_map; 39 int actual_num_seg1_blocks; 40 int actual_num_seg2_blocks; 41 int counter_encode_maxq_scene_change; 42 uint8_t speed; 43 unsigned char group_index; 44 } LAYER_CONTEXT; 45 46 typedef struct SVC { 47 int spatial_layer_id; 48 int temporal_layer_id; 49 int number_spatial_layers; 50 int number_temporal_layers; 51 int external_ref_frame_config; 52 int non_reference_frame; 53 // LAST_FRAME (0), LAST2_FRAME(1), LAST3_FRAME(2), GOLDEN_FRAME(3), 54 // BWDREF_FRAME(4), ALTREF2_FRAME(5), ALTREF_FRAME(6). 55 int reference[INTER_REFS_PER_FRAME]; 56 int ref_idx[INTER_REFS_PER_FRAME]; 57 int refresh[REF_FRAMES]; 58 double base_framerate; 59 unsigned int current_superframe; 60 unsigned int buffer_time_index[REF_FRAMES]; 61 unsigned char buffer_spatial_layer[REF_FRAMES]; 62 int skip_nonzeromv_last; 63 int skip_nonzeromv_gf; 64 // Layer context used for rate control in one pass temporal CBR mode or 65 // two pass spatial mode. 66 LAYER_CONTEXT layer_context[AOM_MAX_LAYERS]; 67 } SVC; 68 69 struct AV1_COMP; 70 71 // Initialize layer context data from init_config(). 72 void av1_init_layer_context(struct AV1_COMP *const cpi); 73 74 // Update the layer context from a change_config() call. 75 void av1_update_layer_context_change_config(struct AV1_COMP *const cpi, 76 const int64_t target_bandwidth); 77 78 // Prior to encoding the frame, update framerate-related quantities 79 // for the current temporal layer. 80 void av1_update_temporal_layer_framerate(struct AV1_COMP *const cpi); 81 82 // Prior to encoding the frame, set the layer context, for the current layer 83 // to be encoded, to the cpi struct. 84 void av1_restore_layer_context(struct AV1_COMP *const cpi); 85 86 // Save the layer context after encoding the frame. 87 void av1_save_layer_context(struct AV1_COMP *const cpi); 88 89 void av1_free_svc_cyclic_refresh(struct AV1_COMP *const cpi); 90 91 void av1_svc_reset_temporal_layers(struct AV1_COMP *const cpi, int is_key); 92 93 void av1_one_pass_cbr_svc_start_layer(struct AV1_COMP *const cpi); 94 95 #ifdef __cplusplus 96 } // extern "C" 97 #endif 98 99 #endif // AOM_AV1_ENCODER_SVC_LAYERCONTEXT_H_ 100