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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 "libavutil/buffer.h"
#include "libavutil/internal.h"
#include "vp9.h"
#include "vp9dsp.h"
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;
VP56mv mv[4 /* b_idx */][2 /* ref */];
enum BlockSize bs;
enum TxfmMode tx, uvtx;
enum BlockLevel bl;
enum BlockPartition bp;
} VP9Block;
typedef struct VP9Context {
VP9SharedContext s;
VP9DSPContext dsp;
VideoDSPContext vdsp;
GetBitContext gb;
VP56RangeCoder c;
VP56RangeCoder *c_b;
unsigned c_b_size;
VP9Block *b_base, *b;
int pass;
int row, row7, col, col7;
uint8_t *dst[3];
ptrdiff_t y_stride, uv_stride;
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;
unsigned tile_row_start, tile_row_end, tile_col_start, tile_col_end;
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;
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;
// contextual (left/above) cache
DECLARE_ALIGNED(16, uint8_t, left_y_nnz_ctx)[16];
DECLARE_ALIGNED(16, uint8_t, left_mode_ctx)[16];
DECLARE_ALIGNED(16, VP56mv, 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];
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;
VP56mv (*above_mv_ctx)[2];
// whole-frame cache
uint8_t *intra_pred_data[3];
VP9Filter *lflvl;
DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[135 * 144 * 2];
// block reconstruction intermediates
int block_alloc_using_2pass;
int16_t *block_base, *block, *uvblock_base[2], *uvblock[2];
uint8_t *eob_base, *uveob_base[2], *eob, *uveob[2];
struct { int x, y; } min_mv, max_mv;
DECLARE_ALIGNED(32, uint8_t, tmp_y)[64 * 64 * 2];
DECLARE_ALIGNED(32, uint8_t, tmp_uv)[2][64 * 64 * 2];
uint16_t mvscale[3][2];
uint8_t mvstep[3][2];
} VP9Context;
void ff_vp9_fill_mv(VP9Context *s, VP56mv *mv, int mode, int sb);
void ff_vp9_adapt_probs(VP9Context *s);
void ff_vp9_decode_block(AVCodecContext *ctx, int row, int col,
VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
enum BlockLevel bl, enum BlockPartition bp);
#endif /* AVCODEC_VP9DEC_H */
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