3134a52d26
Rename the source downsampling filter, and define it per spatial layers. Used 1 pass CBR SVC. Change-Id: I8135f2ab89c535c53429b9c58b586f746bb668c7
151 lines
5.0 KiB
C
151 lines
5.0 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_
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#define VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_
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#include "vpx/vpx_encoder.h"
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#include "vp9/encoder/vp9_ratectrl.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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RATE_CONTROL rc;
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int target_bandwidth;
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int spatial_layer_target_bandwidth; // Target for the spatial layer.
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double framerate;
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int avg_frame_size;
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int max_q;
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int min_q;
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int scaling_factor_num;
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int scaling_factor_den;
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TWO_PASS twopass;
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vpx_fixed_buf_t rc_twopass_stats_in;
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unsigned int current_video_frame_in_layer;
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int is_key_frame;
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int frames_from_key_frame;
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FRAME_TYPE last_frame_type;
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struct lookahead_entry *alt_ref_source;
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int alt_ref_idx;
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int gold_ref_idx;
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int has_alt_frame;
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size_t layer_size;
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struct vpx_psnr_pkt psnr_pkt;
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// Cyclic refresh parameters (aq-mode=3), that need to be updated per-frame.
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int sb_index;
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signed char *map;
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uint8_t *last_coded_q_map;
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uint8_t *consec_zero_mv;
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uint8_t speed;
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} LAYER_CONTEXT;
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typedef struct {
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int spatial_layer_id;
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int temporal_layer_id;
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int number_spatial_layers;
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int number_temporal_layers;
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int spatial_layer_to_encode;
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int first_spatial_layer_to_encode;
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int rc_drop_superframe;
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// Workaround for multiple frame contexts
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enum { ENCODED = 0, ENCODING, NEED_TO_ENCODE } encode_empty_frame_state;
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struct lookahead_entry empty_frame;
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int encode_intra_empty_frame;
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// Store scaled source frames to be used for temporal filter to generate
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// a alt ref frame.
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YV12_BUFFER_CONFIG scaled_frames[MAX_LAG_BUFFERS];
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// Temp buffer used for 2-stage down-sampling, for real-time mode.
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YV12_BUFFER_CONFIG scaled_temp;
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int scaled_one_half;
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int scaled_temp_is_alloc;
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// Layer context used for rate control in one pass temporal CBR mode or
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// two pass spatial mode.
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LAYER_CONTEXT layer_context[VPX_MAX_LAYERS];
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// Indicates what sort of temporal layering is used.
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// Currently, this only works for CBR mode.
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VP9E_TEMPORAL_LAYERING_MODE temporal_layering_mode;
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// Frame flags and buffer indexes for each spatial layer, set by the
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// application (external settings).
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int ext_frame_flags[VPX_MAX_LAYERS];
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int ext_lst_fb_idx[VPX_MAX_LAYERS];
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int ext_gld_fb_idx[VPX_MAX_LAYERS];
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int ext_alt_fb_idx[VPX_MAX_LAYERS];
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int ref_frame_index[REF_FRAMES];
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int force_zero_mode_spatial_ref;
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int current_superframe;
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int use_base_mv;
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// Used to control the downscaling filter for source scaling, for 1 pass CBR.
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// 0 will do sub-sampling (no weighted average), 1 will center the target
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// pixel and use the averaging filter, for the default eightap_regular:
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// {-1, 6, -19, 78, 78, -19, 6, -1 }.
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// TODO(marpan): Add option for bilinear.
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int filtertype_downsample_source[VPX_SS_MAX_LAYERS];
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} SVC;
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struct VP9_COMP;
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// Initialize layer context data from init_config().
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void vp9_init_layer_context(struct VP9_COMP *const cpi);
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// Update the layer context from a change_config() call.
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void vp9_update_layer_context_change_config(struct VP9_COMP *const cpi,
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const int target_bandwidth);
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// Prior to encoding the frame, update framerate-related quantities
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// for the current temporal layer.
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void vp9_update_temporal_layer_framerate(struct VP9_COMP *const cpi);
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// Update framerate-related quantities for the current spatial layer.
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void vp9_update_spatial_layer_framerate(struct VP9_COMP *const cpi,
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double framerate);
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// Prior to encoding the frame, set the layer context, for the current layer
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// to be encoded, to the cpi struct.
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void vp9_restore_layer_context(struct VP9_COMP *const cpi);
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// Save the layer context after encoding the frame.
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void vp9_save_layer_context(struct VP9_COMP *const cpi);
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// Initialize second pass rc for spatial svc.
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void vp9_init_second_pass_spatial_svc(struct VP9_COMP *cpi);
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// Increment number of video frames in layer
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void vp9_inc_frame_in_layer(struct VP9_COMP *const cpi);
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// Check if current layer is key frame in spatial upper layer
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int vp9_is_upper_layer_key_frame(const struct VP9_COMP *const cpi);
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// Get the next source buffer to encode
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struct lookahead_entry *vp9_svc_lookahead_pop(struct VP9_COMP *const cpi,
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struct lookahead_ctx *ctx,
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int drain);
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// Start a frame and initialize svc parameters
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int vp9_svc_start_frame(struct VP9_COMP *const cpi);
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int vp9_one_pass_cbr_svc_start_layer(struct VP9_COMP *const cpi);
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void vp9_free_svc_cyclic_refresh(struct VP9_COMP *const cpi);
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void vp9_svc_reset_key_frame(struct VP9_COMP *const cpi);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP9_ENCODER_VP9_SVC_LAYERCONTEXT_
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