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VP8: optimize VP8Context struct ordering
Shaves at least 3KB off code size on x86, should improve cache utilization. This would probably be useful to do for other decoders/encoders as well.
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@ -474,7 +474,7 @@ void decode_mvs(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y)
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enum { EDGE_TOP, EDGE_LEFT, EDGE_TOPLEFT };
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int idx = CNT_ZERO;
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int cur_sign_bias = s->sign_bias[mb->ref_frame];
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int *sign_bias = s->sign_bias;
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int8_t *sign_bias = s->sign_bias;
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VP56mv near_mv[4];
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uint8_t cnt[4] = { 0 };
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VP56RangeCoder *c = &s->c;
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178
libavcodec/vp8.h
178
libavcodec/vp8.h
@ -85,49 +85,88 @@ typedef struct {
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typedef struct {
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AVCodecContext *avctx;
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DSPContext dsp;
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VP8DSPContext vp8dsp;
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H264PredContext hpc;
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vp8_mc_func put_pixels_tab[3][3][3];
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AVFrame frames[4];
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AVFrame *framep[4];
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uint8_t *edge_emu_buffer;
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VP56RangeCoder c; ///< header context, includes mb modes and motion vectors
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int profile;
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int mb_width; /* number of horizontal MB */
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int mb_height; /* number of vertical MB */
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uint16_t mb_width; /* number of horizontal MB */
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uint16_t mb_height; /* number of vertical MB */
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int linesize;
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int uvlinesize;
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int keyframe;
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int invisible;
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int update_last; ///< update VP56_FRAME_PREVIOUS with the current one
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int update_golden; ///< VP56_FRAME_NONE if not updated, or which frame to copy if so
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int update_altref;
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int deblock_filter;
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uint8_t keyframe;
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uint8_t deblock_filter;
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uint8_t mbskip_enabled;
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uint8_t segment; ///< segment of the current macroblock
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uint8_t chroma_pred_mode; ///< 8x8c pred mode of the current macroblock
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uint8_t profile;
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VP56mv mv_min;
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VP56mv mv_max;
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int8_t sign_bias[4]; ///< one state [0, 1] per ref frame type
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int ref_count[3];
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/**
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* If this flag is not set, all the probability updates
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* are discarded after this frame is decoded.
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* Base parameters for segmentation, i.e. per-macroblock parameters.
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* These must be kept unchanged even if segmentation is not used for
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* a frame, since the values persist between interframes.
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*/
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int update_probabilities;
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struct {
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uint8_t enabled;
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uint8_t absolute_vals;
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uint8_t update_map;
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int8_t base_quant[4];
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int8_t filter_level[4]; ///< base loop filter level
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} segmentation;
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/**
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* All coefficients are contained in separate arith coding contexts.
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* There can be 1, 2, 4, or 8 of these after the header context.
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*/
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int num_coeff_partitions;
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VP56RangeCoder coeff_partition[8];
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struct {
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uint8_t simple;
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uint8_t level;
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uint8_t sharpness;
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} filter;
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VP8Macroblock *macroblocks;
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VP8Macroblock *macroblocks_base;
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VP8FilterStrength *filter_strength;
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uint8_t *intra4x4_pred_mode_top;
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uint8_t intra4x4_pred_mode_left[4];
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uint8_t *segmentation_map;
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/**
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* Macroblocks can have one of 4 different quants in a frame when
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* segmentation is enabled.
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* If segmentation is disabled, only the first segment's values are used.
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*/
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struct {
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// [0] - DC qmul [1] - AC qmul
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int16_t luma_qmul[2];
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int16_t luma_dc_qmul[2]; ///< luma dc-only block quant
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int16_t chroma_qmul[2];
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} qmat[4];
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struct {
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uint8_t enabled; ///< whether each mb can have a different strength based on mode/ref
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/**
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* filter strength adjustment for the following macroblock modes:
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* [0-3] - i16x16 (always zero)
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* [4] - i4x4
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* [5] - zero mv
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* [6] - inter modes except for zero or split mv
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* [7] - split mv
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* i16x16 modes never have any adjustment
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*/
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int8_t mode[VP8_MVMODE_SPLIT+1];
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/**
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* filter strength adjustment for macroblocks that reference:
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* [0] - intra / VP56_FRAME_CURRENT
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* [1] - VP56_FRAME_PREVIOUS
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* [2] - VP56_FRAME_GOLDEN
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* [3] - altref / VP56_FRAME_GOLDEN2
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*/
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int8_t ref[4];
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} lf_delta;
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/**
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* Cache of the top row needed for intra prediction
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* 16 for luma, 8 for each chroma plane
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@ -151,74 +190,11 @@ typedef struct {
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* 2+-> full transform
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*/
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DECLARE_ALIGNED(16, uint8_t, non_zero_count_cache)[6][4];
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VP56RangeCoder c; ///< header context, includes mb modes and motion vectors
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DECLARE_ALIGNED(16, DCTELEM, block)[6][4][16];
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DECLARE_ALIGNED(16, DCTELEM, block_dc)[16];
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uint8_t intra4x4_pred_mode_mb[16];
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int chroma_pred_mode; ///< 8x8c pred mode of the current macroblock
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int segment; ///< segment of the current macroblock
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VP56mv mv_min;
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VP56mv mv_max;
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int mbskip_enabled;
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int sign_bias[4]; ///< one state [0, 1] per ref frame type
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int ref_count[3];
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/**
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* Base parameters for segmentation, i.e. per-macroblock parameters.
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* These must be kept unchanged even if segmentation is not used for
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* a frame, since the values persist between interframes.
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*/
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struct {
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int enabled;
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int absolute_vals;
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int update_map;
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int8_t base_quant[4];
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int8_t filter_level[4]; ///< base loop filter level
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} segmentation;
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/**
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* Macroblocks can have one of 4 different quants in a frame when
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* segmentation is enabled.
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* If segmentation is disabled, only the first segment's values are used.
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*/
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struct {
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// [0] - DC qmul [1] - AC qmul
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int16_t luma_qmul[2];
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int16_t luma_dc_qmul[2]; ///< luma dc-only block quant
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int16_t chroma_qmul[2];
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} qmat[4];
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struct {
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int simple;
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int level;
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int sharpness;
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} filter;
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struct {
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int enabled; ///< whether each mb can have a different strength based on mode/ref
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/**
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* filter strength adjustment for the following macroblock modes:
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* [0-3] - i16x16 (always zero)
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* [4] - i4x4
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* [5] - zero mv
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* [6] - inter modes except for zero or split mv
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* [7] - split mv
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* i16x16 modes never have any adjustment
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*/
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int8_t mode[VP8_MVMODE_SPLIT+1];
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/**
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* filter strength adjustment for macroblocks that reference:
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* [0] - intra / VP56_FRAME_CURRENT
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* [1] - VP56_FRAME_PREVIOUS
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* [2] - VP56_FRAME_GOLDEN
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* [3] - altref / VP56_FRAME_GOLDEN2
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*/
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int8_t ref[4];
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} lf_delta;
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/**
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* These are all of the updatable probabilities for binary decisions.
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* They are only implictly reset on keyframes, making it quite likely
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@ -236,6 +212,30 @@ typedef struct {
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uint8_t token[4][16][3][NUM_DCT_TOKENS-1];
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uint8_t mvc[2][19];
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} prob[2];
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VP8Macroblock *macroblocks_base;
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int invisible;
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int update_last; ///< update VP56_FRAME_PREVIOUS with the current one
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int update_golden; ///< VP56_FRAME_NONE if not updated, or which frame to copy if so
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int update_altref;
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/**
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* If this flag is not set, all the probability updates
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* are discarded after this frame is decoded.
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*/
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int update_probabilities;
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/**
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* All coefficients are contained in separate arith coding contexts.
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* There can be 1, 2, 4, or 8 of these after the header context.
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*/
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int num_coeff_partitions;
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VP56RangeCoder coeff_partition[8];
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DSPContext dsp;
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VP8DSPContext vp8dsp;
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H264PredContext hpc;
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vp8_mc_func put_pixels_tab[3][3][3];
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AVFrame frames[4];
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} VP8Context;
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#endif
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