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Diffstat (limited to 'media/libvpx/libvpx/vp9/encoder/vp9_svc_layercontext.h')
| -rw-r--r-- | media/libvpx/libvpx/vp9/encoder/vp9_svc_layercontext.h | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/vp9_svc_layercontext.h b/media/libvpx/libvpx/vp9/encoder/vp9_svc_layercontext.h new file mode 100644 index 0000000000..388a02789d --- /dev/null +++ b/media/libvpx/libvpx/vp9/encoder/vp9_svc_layercontext.h @@ -0,0 +1,290 @@ +/* + * 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 VPX_VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_ +#define VPX_VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_ + +#include "vpx/vpx_encoder.h" + +#include "vp9/encoder/vp9_ratectrl.h" + +#ifdef __cplusplus +extern "C" { +#endif + +typedef enum { + // Inter-layer prediction is on on all frames. + INTER_LAYER_PRED_ON, + // Inter-layer prediction is off on all frames. + INTER_LAYER_PRED_OFF, + // Inter-layer prediction is off on non-key frames and non-sync frames. + INTER_LAYER_PRED_OFF_NONKEY, + // Inter-layer prediction is on on all frames, but constrained such + // that any layer S (> 0) can only predict from previous spatial + // layer S-1, from the same superframe. + INTER_LAYER_PRED_ON_CONSTRAINED +} INTER_LAYER_PRED; + +typedef struct BUFFER_LONGTERM_REF { + int idx; + int is_used; +} BUFFER_LONGTERM_REF; + +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; + // Scaling factors used for internal resize scaling for single layer SVC. + int scaling_factor_num_resize; + int scaling_factor_den_resize; + 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; + // Cyclic refresh parameters (aq-mode=3), that need to be updated per-frame. + // TODO(jianj/marpan): Is it better to use the full cyclic refresh struct. + int sb_index; + signed char *map; + uint8_t *last_coded_q_map; + uint8_t *consec_zero_mv; + int actual_num_seg1_blocks; + int actual_num_seg2_blocks; + int counter_encode_maxq_scene_change; + int qindex_delta[3]; + uint8_t speed; + int loopfilter_ctrl; + int frame_qp; + int MBs; +} LAYER_CONTEXT; + +typedef struct SVC { + int spatial_layer_id; + int temporal_layer_id; + int number_spatial_layers; + int number_temporal_layers; + + int spatial_layer_to_encode; + + // 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; + int scaled_one_half; + int scaled_temp_is_alloc; + + // 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 lst_fb_idx[VPX_MAX_LAYERS]; + int gld_fb_idx[VPX_MAX_LAYERS]; + int alt_fb_idx[VPX_MAX_LAYERS]; + int force_zero_mode_spatial_ref; + // Sequence level flag to enable second (long term) temporal reference. + int use_gf_temporal_ref; + // Frame level flag to enable second (long term) temporal reference. + int use_gf_temporal_ref_current_layer; + // Allow second reference for at most 2 top highest resolution layers. + BUFFER_LONGTERM_REF buffer_gf_temporal_ref[2]; + int current_superframe; + int non_reference_frame; + int use_base_mv; + int use_partition_reuse; + // Used to control the downscaling filter for source scaling, for 1 pass CBR. + // downsample_filter_phase: = 0 will do sub-sampling (no weighted average), + // = 8 will center the target pixel and get a symmetric averaging filter. + // downsample_filter_type: 4 filters may be used: eighttap_regular, + // eighttap_smooth, eighttap_sharp, and bilinear. + INTERP_FILTER downsample_filter_type[VPX_SS_MAX_LAYERS]; + int downsample_filter_phase[VPX_SS_MAX_LAYERS]; + + BLOCK_SIZE *prev_partition_svc; + int mi_stride[VPX_MAX_LAYERS]; + int mi_rows[VPX_MAX_LAYERS]; + int mi_cols[VPX_MAX_LAYERS]; + + int first_layer_denoise; + + int skip_enhancement_layer; + + int lower_layer_qindex; + + int last_layer_dropped[VPX_MAX_LAYERS]; + int drop_spatial_layer[VPX_MAX_LAYERS]; + int framedrop_thresh[VPX_MAX_LAYERS]; + int drop_count[VPX_MAX_LAYERS]; + int force_drop_constrained_from_above[VPX_MAX_LAYERS]; + int max_consec_drop; + SVC_LAYER_DROP_MODE framedrop_mode; + + INTER_LAYER_PRED disable_inter_layer_pred; + + // Flag to indicate scene change and high num of motion blocks at current + // superframe, scene detection is currently checked for each superframe prior + // to encoding, on the full resolution source. + int high_source_sad_superframe; + int high_num_blocks_with_motion; + + // Flags used to get SVC pattern info. + int update_buffer_slot[VPX_SS_MAX_LAYERS]; + uint8_t reference_last[VPX_SS_MAX_LAYERS]; + uint8_t reference_golden[VPX_SS_MAX_LAYERS]; + uint8_t reference_altref[VPX_SS_MAX_LAYERS]; + // TODO(jianj): Remove these last 3, deprecated. + uint8_t update_last[VPX_SS_MAX_LAYERS]; + uint8_t update_golden[VPX_SS_MAX_LAYERS]; + uint8_t update_altref[VPX_SS_MAX_LAYERS]; + + // Keep track of the frame buffer index updated/refreshed on the base + // temporal superframe. + int fb_idx_upd_tl0[VPX_SS_MAX_LAYERS]; + + // Keep track of the spatial and temporal layer id of the frame that last + // updated the frame buffer index. + uint8_t fb_idx_spatial_layer_id[REF_FRAMES]; + uint8_t fb_idx_temporal_layer_id[REF_FRAMES]; + + int spatial_layer_sync[VPX_SS_MAX_LAYERS]; + // Quantizer for each spatial layer. + int base_qindex[VPX_SS_MAX_LAYERS]; + uint8_t set_intra_only_frame; + uint8_t previous_frame_is_intra_only; + uint8_t superframe_has_layer_sync; + + uint8_t fb_idx_base[REF_FRAMES]; + + int use_set_ref_frame_config; + + int temporal_layer_id_per_spatial[VPX_SS_MAX_LAYERS]; + + int first_spatial_layer_to_encode; + + // Parameters for allowing framerate per spatial layer, and buffer + // update based on timestamps. + int64_t duration[VPX_SS_MAX_LAYERS]; + int64_t timebase_fac; + int64_t time_stamp_superframe; + int64_t time_stamp_prev[VPX_SS_MAX_LAYERS]; + + int num_encoded_top_layer; + + // Every spatial layer on a superframe whose base is key is key too. + int simulcast_mode; + + // Flag to indicate SVC is dynamically switched to a single layer. + int single_layer_svc; + int resize_set; +} 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); + +void get_layer_resolution(const int width_org, const int height_org, + const int num, const int den, int *width_out, + int *height_out); + +// 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); + +#if CONFIG_VP9_TEMPORAL_DENOISING +int vp9_denoise_svc_non_key(struct VP9_COMP *const cpi); +#endif + +void vp9_copy_flags_ref_update_idx(struct VP9_COMP *const cpi); + +int vp9_one_pass_svc_start_layer(struct VP9_COMP *const cpi); + +void vp9_free_svc_cyclic_refresh(struct VP9_COMP *const cpi); + +void vp9_svc_reset_temporal_layers(struct VP9_COMP *const cpi, int is_key); + +void vp9_svc_check_reset_layer_rc_flag(struct VP9_COMP *const cpi); + +void vp9_svc_constrain_inter_layer_pred(struct VP9_COMP *const cpi); + +void vp9_svc_assert_constraints_pattern(struct VP9_COMP *const cpi); + +void vp9_svc_check_spatial_layer_sync(struct VP9_COMP *const cpi); + +void vp9_svc_update_ref_frame_buffer_idx(struct VP9_COMP *const cpi); + +void vp9_svc_update_ref_frame_key_simulcast(struct VP9_COMP *const cpi); + +void vp9_svc_update_ref_frame(struct VP9_COMP *const cpi); + +void vp9_svc_adjust_frame_rate(struct VP9_COMP *const cpi); + +void vp9_svc_adjust_avg_frame_qindex(struct VP9_COMP *const cpi); + +int vp9_svc_check_skip_enhancement_layer(struct VP9_COMP *const cpi); +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // VPX_VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_ |