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| 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 // Increment number of video frames in layer |
| 74 void vp9_inc_frame_in_layer(SVC *svc); |
| 75 |
| 76 #ifdef __cplusplus |
| 77 } // extern "C" |
| 78 #endif |
| 79 |
| 80 #endif // VP9_ENCODER_VP9_SVC_LAYERCONTEXT_ |
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