ref: 82762e240cd7e430ed59157dd302299a4c3d620b
dir: /vp9/encoder/vp9_svc_layercontext.h/
/* * Copyright (c) 2014 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #ifndef VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_ #define VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_ #include "vpx/vpx_encoder.h" #include "vp9/encoder/vp9_ratectrl.h" #ifdef __cplusplus extern "C" { #endif typedef struct { RATE_CONTROL rc; int target_bandwidth; int spatial_layer_target_bandwidth; // Target for the spatial layer. double framerate; int avg_frame_size; int max_q; int min_q; int scaling_factor_num; int scaling_factor_den; TWO_PASS twopass; vpx_fixed_buf_t rc_twopass_stats_in; unsigned int current_video_frame_in_layer; int is_key_frame; int frames_from_key_frame; FRAME_TYPE last_frame_type; struct lookahead_entry *alt_ref_source; int alt_ref_idx; int gold_ref_idx; int has_alt_frame; size_t layer_size; struct vpx_psnr_pkt psnr_pkt; // Cyclic refresh parameters (aq-mode=3), that need to be updated per-frame. int sb_index; signed char *map; uint8_t *last_coded_q_map; uint8_t *consec_zero_mv; } LAYER_CONTEXT; typedef struct { int spatial_layer_id; int temporal_layer_id; int number_spatial_layers; int number_temporal_layers; int spatial_layer_to_encode; int first_spatial_layer_to_encode; int rc_drop_superframe; // Workaround for multiple frame contexts enum { ENCODED = 0, ENCODING, NEED_TO_ENCODE }encode_empty_frame_state; struct lookahead_entry empty_frame; int encode_intra_empty_frame; // Store scaled source frames to be used for temporal filter to generate // a alt ref frame. YV12_BUFFER_CONFIG scaled_frames[MAX_LAG_BUFFERS]; // Temp buffer used for 2-stage down-sampling, for real-time mode. YV12_BUFFER_CONFIG scaled_temp; // Layer context used for rate control in one pass temporal CBR mode or // two pass spatial mode. LAYER_CONTEXT layer_context[VPX_MAX_LAYERS]; // Indicates what sort of temporal layering is used. // Currently, this only works for CBR mode. VP9E_TEMPORAL_LAYERING_MODE temporal_layering_mode; // Frame flags and buffer indexes for each spatial layer, set by the // application (external settings). int ext_frame_flags[VPX_MAX_LAYERS]; int ext_lst_fb_idx[VPX_MAX_LAYERS]; int ext_gld_fb_idx[VPX_MAX_LAYERS]; int ext_alt_fb_idx[VPX_MAX_LAYERS]; int ref_frame_index[REF_FRAMES]; int force_zero_mode_spatial_ref; int current_superframe; int use_base_mv; } SVC; struct VP9_COMP; // Initialize layer context data from init_config(). void vp9_init_layer_context(struct VP9_COMP *const cpi); // Update the layer context from a change_config() call. void vp9_update_layer_context_change_config(struct VP9_COMP *const cpi, const int target_bandwidth); // Prior to encoding the frame, update framerate-related quantities // for the current temporal layer. void vp9_update_temporal_layer_framerate(struct VP9_COMP *const cpi); // Update framerate-related quantities for the current spatial layer. void vp9_update_spatial_layer_framerate(struct VP9_COMP *const cpi, double framerate); // Prior to encoding the frame, set the layer context, for the current layer // to be encoded, to the cpi struct. void vp9_restore_layer_context(struct VP9_COMP *const cpi); // Save the layer context after encoding the frame. void vp9_save_layer_context(struct VP9_COMP *const cpi); // Initialize second pass rc for spatial svc. void vp9_init_second_pass_spatial_svc(struct VP9_COMP *cpi); // Increment number of video frames in layer void vp9_inc_frame_in_layer(struct VP9_COMP *const cpi); // Check if current layer is key frame in spatial upper layer int vp9_is_upper_layer_key_frame(const struct VP9_COMP *const cpi); // Get the next source buffer to encode struct lookahead_entry *vp9_svc_lookahead_pop(struct VP9_COMP *const cpi, struct lookahead_ctx *ctx, int drain); // Start a frame and initialize svc parameters int vp9_svc_start_frame(struct VP9_COMP *const cpi); int vp9_one_pass_cbr_svc_start_layer(struct VP9_COMP *const cpi); void vp9_free_svc_cyclic_refresh(struct VP9_COMP *const cpi); void vp9_svc_reset_key_frame(struct VP9_COMP *const cpi); #ifdef __cplusplus } // extern "C" #endif #endif // VP9_ENCODER_VP9_SVC_LAYERCONTEXT_