/* * Copyright (c) 2019, Alliance for Open Media. All rights reserved. * * This source code is subject to the terms of the BSD 2 Clause License and * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License * was not distributed with this source code in the LICENSE file, you can * obtain it at www.aomedia.org/license/software. If the Alliance for Open * Media Patent License 1.0 was not distributed with this source code in the * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
/*! * \brief The stucture of quantities related to each spatial and temporal layer. * \ingroup SVC
*/ typedefstruct { /*!\cond */
RATE_CONTROL rc;
PRIMARY_RATE_CONTROL p_rc; int framerate_factor;
int64_t layer_target_bitrate; // In bits per second. int scaling_factor_num; int scaling_factor_den;
int64_t target_bandwidth;
int64_t spatial_layer_target_bandwidth; double framerate; int avg_frame_size; int max_q; int min_q; int frames_from_key_frame; /*!\endcond */
/*! * Cyclic refresh parameters (aq-mode=3), that need to be updated per-frame.
*/ int sb_index; /*! * Segmentation map
*/
int8_t *map; /*! * Number of blocks on segment 1
*/ int actual_num_seg1_blocks;
/*! * Number of blocks on segment 2
*/ int actual_num_seg2_blocks; /*! * Counter used to detect scene change.
*/ int counter_encode_maxq_scene_change;
/*! * Speed settings for each layer.
*/
uint8_t speed; /*! * GF group index.
*/ unsignedchar group_index; /*! * If current layer is key frame.
*/ int is_key_frame; /*! * Maximum motion magnitude of previous encoded layer.
*/ int max_mv_magnitude;
} LAYER_CONTEXT;
/*! * \brief The stucture of SVC. * \ingroup SVC
*/ typedefstruct SVC { /*!\cond */ int spatial_layer_id; int temporal_layer_id; int number_spatial_layers; int number_temporal_layers; int prev_number_spatial_layers; int use_flexible_mode; int ksvc_fixed_mode; /*!\endcond */
/*!\cond */ double base_framerate; unsignedint current_superframe; int skip_mvsearch_last; int skip_mvsearch_gf; int skip_mvsearch_altref; int spatial_layer_fb[REF_FRAMES]; int temporal_layer_fb[REF_FRAMES]; int num_encoded_top_layer; int first_layer_denoise;
YV12_BUFFER_CONFIG source_last_TL0; int mi_cols_full_resoln; int mi_rows_full_resoln; /*!\endcond */
/*! * Layer context used for rate control in CBR mode. * An array. The index for spatial layer `sl` and temporal layer `tl` is * sl * number_temporal_layers + tl.
*/
LAYER_CONTEXT *layer_context;
/*! * Number of layers allocated for layer_context. If nonzero, must be greater * than or equal to number_spatial_layers * number_temporal_layers.
*/ int num_allocated_layers;
/*! * EIGHTTAP_SMOOTH or BILINEAR
*/
InterpFilter downsample_filter_type[AOM_MAX_SS_LAYERS];
/*! * Downsample_filter_phase: = 0 will do sub-sampling (no weighted average), * = 8 will center the target pixel and get a symmetric averaging filter.
*/ int downsample_filter_phase[AOM_MAX_SS_LAYERS];
/*! * Force zero-mv in mode search for the spatial/inter-layer reference.
*/ int force_zero_mode_spatial_ref;
/*! * Flag to indicate that current spatial layer has a lower quality layer * (at the same timestamp) that can be used as a reference. * Lower quality layer refers to the same resolution but encoded at * different/lower bitrate.
*/ int has_lower_quality_layer;
/*! * Flag to indicate the frame drop mode for SVC: one of the two settings: * AOM_LAYER_DROP (default) or AOM_FULL_SUPERFRAME_DROP.
*/
AOM_SVC_FRAME_DROP_MODE framedrop_mode;
/*! * Flag to indicate if frame was dropped for a given spatial_layer_id on * previous superframe.
*/ bool last_layer_dropped[AOM_MAX_SS_LAYERS];
/*! * Flag to indicate if a previous spatial was dropped for the same superframe.
*/ bool drop_spatial_layer[AOM_MAX_SS_LAYERS];
} SVC;
struct AV1_COMP; struct EncodeFrameInput;
/*!\brief Initialize layer context data from init_config(). * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * * \remark Nothing returned. Set cpi->svc.
*/ void av1_init_layer_context(struct AV1_COMP *const cpi);
/*!\brief Allocate layer context data. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * \param[in] num_layers Number of layers to be allocated * * \remark Allocates memory for cpi->svc.layer_context. * \return True on success, false on allocation failure.
*/ bool av1_alloc_layer_context(struct AV1_COMP *cpi, int num_layers);
/*!\brief Update the layer context from a change_config() call. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * \param[in] target_bandwidth Total target bandwidth * * \remark Nothing returned. Buffer level for each layer is set.
*/ void av1_update_layer_context_change_config(struct AV1_COMP *const cpi, const int64_t target_bandwidth);
/*!\brief Prior to encoding the frame, update framerate-related quantities for the current temporal layer. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * * \remark Nothing returned. Frame related quantities for current temporal layer are updated.
*/ void av1_update_temporal_layer_framerate(struct AV1_COMP *const cpi);
/*!\brief Prior to check if reference is lower spatial layer at the same * timestamp/superframe. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * \param[in] ref_frame Reference frame * * \return True if the ref_frame if lower spatial layer, otherwise false.
*/ bool av1_check_ref_is_low_spatial_res_super_frame(struct AV1_COMP *const cpi, int ref_frame);
/*!\brief Prior to encoding the frame, set the layer context, for the current layer to be encoded, to the cpi struct. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * * \remark Nothing returned. Layer context for current layer is set.
*/ void av1_restore_layer_context(struct AV1_COMP *const cpi);
/*!\brief Save the layer context after encoding the frame. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure
*/ void av1_save_layer_context(struct AV1_COMP *const cpi);
/*!\brief Free the memory used for cyclic refresh in layer context. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure
*/ void av1_free_svc_cyclic_refresh(struct AV1_COMP *const cpi);
/*!\brief Reset on key frame: reset counters, references and buffer updates. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * \param[in] is_key Whether current layer is key frame
*/ void av1_svc_reset_temporal_layers(struct AV1_COMP *const cpi, int is_key);
/*!\brief Before encoding, set resolutions and allocate compressor data. * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure
*/ void av1_one_pass_cbr_svc_start_layer(struct AV1_COMP *const cpi);
/*!\brief Get primary reference frame for current layer * * \ingroup SVC * \callgraph * \callergraph * * \param[in] cpi Top level encoder structure * * \return The primary reference frame for current layer.
*/ int av1_svc_primary_ref_frame(conststruct AV1_COMP *const cpi);
/*!\brief Get resolution for current layer. * * \ingroup SVC * \param[in] width_org Original width, unscaled * \param[in] height_org Original height, unscaled * \param[in] num Numerator for the scale ratio * \param[in] den Denominator for the scale ratio * \param[in] width_out Output width, scaled for current layer * \param[in] height_out Output height, scaled for current layer * * \remark Nothing is returned. Instead the scaled width and height are set.
*/ void av1_get_layer_resolution(constint width_org, constint height_org, constint num, constint den, int *width_out, int *height_out);
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