1 /* 2 * Copyright (c) 2014 The WebM 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 VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_ 12 #define VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_ 13 14 #include "vpx/vpx_encoder.h" 15 16 #include "vp9/encoder/vp9_ratectrl.h" 17 18 #ifdef __cplusplus 19 extern "C" { 20 #endif 21 22 typedef struct { 23 RATE_CONTROL rc; 24 int target_bandwidth; 25 int64_t starting_buffer_level; 26 int64_t optimal_buffer_level; 27 int64_t maximum_buffer_size; 28 double framerate; 29 int avg_frame_size; 30 struct twopass_rc twopass; 31 struct vpx_fixed_buf rc_twopass_stats_in; 32 unsigned int current_video_frame_in_layer; 33 } LAYER_CONTEXT; 34 35 typedef struct { 36 int spatial_layer_id; 37 int temporal_layer_id; 38 int number_spatial_layers; 39 int number_temporal_layers; 40 // Layer context used for rate control in one pass temporal CBR mode or 41 // two pass spatial mode. Defined for temporal or spatial layers for now. 42 // Does not support temporal combined with spatial RC. 43 LAYER_CONTEXT layer_context[MAX(VPX_TS_MAX_LAYERS, VPX_SS_MAX_LAYERS)]; 44 } SVC; 45 46 struct VP9_COMP; 47 48 // Initialize layer context data from init_config(). 49 void vp9_init_layer_context(struct VP9_COMP *const cpi); 50 51 // Update the layer context from a change_config() call. 52 void vp9_update_layer_context_change_config(struct VP9_COMP *const cpi, 53 const int target_bandwidth); 54 55 // Prior to encoding the frame, update framerate-related quantities 56 // for the current temporal layer. 57 void vp9_update_temporal_layer_framerate(struct VP9_COMP *const cpi); 58 59 // Update framerate-related quantities for the current spatial layer. 60 void vp9_update_spatial_layer_framerate(struct VP9_COMP *const cpi, 61 double framerate); 62 63 // Prior to encoding the frame, set the layer context, for the current layer 64 // to be encoded, to the cpi struct. 65 void vp9_restore_layer_context(struct VP9_COMP *const cpi); 66 67 // Save the layer context after encoding the frame. 68 void vp9_save_layer_context(struct VP9_COMP *const cpi); 69 70 // Initialize second pass rc for spatial svc. 71 void vp9_init_second_pass_spatial_svc(struct VP9_COMP *cpi); 72 73 #ifdef __cplusplus 74 } // extern "C" 75 #endif 76 77 #endif // VP9_ENCODER_VP9_SVC_LAYERCONTEXT_ 78