vp9dec.h - mozsearch

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/*

 * VP9 compatible video decoder

 * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>

 * Copyright (C) 2013 Clément Bœsch <u pkh me>

 * This file is part of FFmpeg.

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

*/

#ifndef AVCODEC_VP9DEC_H

#define AVCODEC_VP9DEC_H

#include <stddef.h>

#include <stdint.h>

#include <stdatomic.h>

#include "libavutil/mem_internal.h"

#include "libavutil/thread.h"

#include "libavutil/internal.h"

#include "get_bits.h"

#include "videodsp.h"

#include "vp9.h"

#include "vp9dsp.h"

#include "vp9shared.h"

#include "vpx_rac.h"

#define REF_INVALID_SCALE 0xFFFF

enum MVJoint {

    MV_JOINT_ZERO,

    MV_JOINT_H,

    MV_JOINT_V,

    MV_JOINT_HV,

};

typedef struct ProbContext {

    uint8_t y_mode[4][9];

    uint8_t uv_mode[10][9];

    uint8_t filter[4][2];

    uint8_t mv_mode[7][3];

    uint8_t intra[4];

    uint8_t comp[5];

    uint8_t single_ref[5][2];

    uint8_t comp_ref[5];

    uint8_t tx32p[2][3];

    uint8_t tx16p[2][2];

    uint8_t tx8p[2];

    uint8_t skip[3];

    uint8_t mv_joint[3];

    struct {

        uint8_t sign;

        uint8_t classes[10];

        uint8_t class0;

        uint8_t bits[10];

        uint8_t class0_fp[2][3];

        uint8_t fp[3];

        uint8_t class0_hp;

        uint8_t hp;

    } mv_comp[2];

    uint8_t partition[4][4][3];

} ProbContext;

typedef struct VP9Filter {

    uint8_t level[8 * 8];

    uint8_t /* bit=col */ mask[2 /* 0=y, 1=uv */][2 /* 0=col, 1=row */]

                              [8 /* rows */][4 /* 0=16, 1=8, 2=4, 3=inner4 */];

} VP9Filter;

typedef struct VP9Block {

    uint8_t seg_id, intra, comp, ref[2], mode[4], uvmode, skip;

    enum FilterMode filter;

    VP9mv mv[4 /* b_idx */][2 /* ref */];

    enum BlockSize bs;

    enum TxfmMode tx, uvtx;

    enum BlockLevel bl;

    enum BlockPartition bp;

} VP9Block;

typedef struct VP9TileData VP9TileData;

typedef struct VP9Context {

    VP9SharedContext s;

    VP9TileData *td;

    VP9DSPContext dsp;

    VideoDSPContext vdsp;

    GetBitContext gb;

    VPXRangeCoder c;

    int pass, active_tile_cols;

#if HAVE_THREADS

    pthread_mutex_t progress_mutex;

    pthread_cond_t progress_cond;

    atomic_int *entries;

    unsigned pthread_init_cnt;

#endif

    uint8_t ss_h, ss_v;

    uint8_t last_bpp, bpp_index, bytesperpixel;

    uint8_t last_keyframe;

    // sb_cols/rows, rows/cols and last_fmt are used for allocating all internal

    // arrays, and are thus per-thread. w/h and gf_fmt are synced between threads

    // and are therefore per-stream. pix_fmt represents the value in the header

    // of the currently processed frame.

    int w, h;

    enum AVPixelFormat pix_fmt, last_fmt, gf_fmt;

    unsigned sb_cols, sb_rows, rows, cols;

    ThreadFrame next_refs[8];

    struct {

        uint8_t lim_lut[64];

        uint8_t mblim_lut[64];

    } filter_lut;

    struct {

        ProbContext p;

        uint8_t coef[4][2][2][6][6][3];

    } prob_ctx[4];

    struct {

        ProbContext p;

        uint8_t coef[4][2][2][6][6][11];

    } prob;

    // contextual (above) cache

    uint8_t *above_partition_ctx;

    uint8_t *above_mode_ctx;

    // FIXME maybe merge some of the below in a flags field?

    uint8_t *above_y_nnz_ctx;

    uint8_t *above_uv_nnz_ctx[2];

    uint8_t *above_skip_ctx; // 1bit

    uint8_t *above_txfm_ctx; // 2bit

    uint8_t *above_segpred_ctx; // 1bit

    uint8_t *above_intra_ctx; // 1bit

    uint8_t *above_comp_ctx; // 1bit

    uint8_t *above_ref_ctx; // 2bit

    uint8_t *above_filter_ctx;

    VP9mv (*above_mv_ctx)[2];

    // whole-frame cache

    uint8_t *intra_pred_data[3];

    VP9Filter *lflvl;

    // block reconstruction intermediates

    int block_alloc_using_2pass;

    uint16_t mvscale[3][2];

    uint8_t mvstep[3][2];

    // frame specific buffer pools

    struct FFRefStructPool *frame_extradata_pool;

    int frame_extradata_pool_size;

} VP9Context;

struct VP9TileData {

    const VP9Context *s;

    VPXRangeCoder *c_b;

    VPXRangeCoder *c;

    int row, row7, col, col7;

    uint8_t *dst[3];

    ptrdiff_t y_stride, uv_stride;

    VP9Block *b_base, *b;

    unsigned tile_col_start;

    struct {

        unsigned y_mode[4][10];

        unsigned uv_mode[10][10];

        unsigned filter[4][3];

        unsigned mv_mode[7][4];

        unsigned intra[4][2];

        unsigned comp[5][2];

        unsigned single_ref[5][2][2];

        unsigned comp_ref[5][2];

        unsigned tx32p[2][4];

        unsigned tx16p[2][3];

        unsigned tx8p[2][2];

        unsigned skip[3][2];

        unsigned mv_joint[4];

        struct {

            unsigned sign[2];

            unsigned classes[11];

            unsigned class0[2];

            unsigned bits[10][2];

            unsigned class0_fp[2][4];

            unsigned fp[4];

            unsigned class0_hp[2];

            unsigned hp[2];

        } mv_comp[2];

        unsigned partition[4][4][4];

        unsigned coef[4][2][2][6][6][3];

        unsigned eob[4][2][2][6][6][2];

    } counts;

    // whole-frame cache

    DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[135 * 144 * 2];

    // contextual (left) cache

    DECLARE_ALIGNED(16, uint8_t, left_y_nnz_ctx)[16];

    DECLARE_ALIGNED(16, uint8_t, left_mode_ctx)[16];

    DECLARE_ALIGNED(16, VP9mv, left_mv_ctx)[16][2];

    DECLARE_ALIGNED(16, uint8_t, left_uv_nnz_ctx)[2][16];

    DECLARE_ALIGNED(8, uint8_t, left_partition_ctx)[8];

    DECLARE_ALIGNED(8, uint8_t, left_skip_ctx)[8];

    DECLARE_ALIGNED(8, uint8_t, left_txfm_ctx)[8];

    DECLARE_ALIGNED(8, uint8_t, left_segpred_ctx)[8];

    DECLARE_ALIGNED(8, uint8_t, left_intra_ctx)[8];

    DECLARE_ALIGNED(8, uint8_t, left_comp_ctx)[8];

    DECLARE_ALIGNED(8, uint8_t, left_ref_ctx)[8];

    DECLARE_ALIGNED(8, uint8_t, left_filter_ctx)[8];

    // block reconstruction intermediates

    DECLARE_ALIGNED(32, uint8_t, tmp_y)[64 * 64 * 2];

    DECLARE_ALIGNED(32, uint8_t, tmp_uv)[2][64 * 64 * 2];

    struct { int x, y; } min_mv, max_mv;

    int16_t *block_base, *block, *uvblock_base[2], *uvblock[2];

    uint8_t *eob_base, *uveob_base[2], *eob, *uveob[2];

    // error message

    int error_info;

    struct {

        unsigned int row:13;

        unsigned int col:13;

        unsigned int block_size_idx_x:2;

        unsigned int block_size_idx_y:2;

    } *block_structure;

    unsigned int nb_block_structure;

};

void ff_vp9_fill_mv(VP9TileData *td, VP9mv *mv, int mode, int sb);

void ff_vp9_adapt_probs(VP9Context *s);

void ff_vp9_decode_block(VP9TileData *td, int row, int col,

                         VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,

                         enum BlockLevel bl, enum BlockPartition bp);

void ff_vp9_loopfilter_sb(AVCodecContext *avctx, VP9Filter *lflvl,

                          int row, int col, ptrdiff_t yoff, ptrdiff_t uvoff);

void ff_vp9_intra_recon_8bpp(VP9TileData *td,

                             ptrdiff_t y_off, ptrdiff_t uv_off);

void ff_vp9_intra_recon_16bpp(VP9TileData *td,

                              ptrdiff_t y_off, ptrdiff_t uv_off);

void ff_vp9_inter_recon_8bpp(VP9TileData *td);

void ff_vp9_inter_recon_16bpp(VP9TileData *td);

#endif /* AVCODEC_VP9DEC_H */