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ffmpeg/libavcodec/vp9.h
Ronald S. Bultje 72ca830f51 lavc: VP9 decoder 
Originally written by Ronald S. Bultje <rsbultje@gmail.com> and
Clément Bœsch <u@pkh.me>

Further contributions by:
Anton Khirnov <anton@khirnov.net>
Diego Biurrun <diego@biurrun.de>
Luca Barbato <lu_zero@gentoo.org>
Martin Storsjö <martin@martin.st>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
2013-11-15 10:16:28 +01:00

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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 Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VP9_H
#define AVCODEC_VP9_H
#include <stddef.h>
#include <stdint.h>
#include "libavutil/internal.h"
#include "avcodec.h"
#include "vp56.h"
enum TxfmMode {
TX_4X4,
TX_8X8,
TX_16X16,
TX_32X32,
N_TXFM_SIZES,
TX_SWITCHABLE = N_TXFM_SIZES,
N_TXFM_MODES
};
enum TxfmType {
DCT_DCT,
DCT_ADST,
ADST_DCT,
ADST_ADST,
N_TXFM_TYPES
};
enum IntraPredMode {
VERT_PRED,
HOR_PRED,
DC_PRED,
DIAG_DOWN_LEFT_PRED,
DIAG_DOWN_RIGHT_PRED,
VERT_RIGHT_PRED,
HOR_DOWN_PRED,
VERT_LEFT_PRED,
HOR_UP_PRED,
TM_VP8_PRED,
LEFT_DC_PRED,
TOP_DC_PRED,
DC_128_PRED,
DC_127_PRED,
DC_129_PRED,
N_INTRA_PRED_MODES
};
enum FilterMode {
FILTER_8TAP_SMOOTH,
FILTER_8TAP_REGULAR,
FILTER_8TAP_SHARP,
FILTER_BILINEAR,
FILTER_SWITCHABLE,
};
enum BlockPartition {
PARTITION_NONE, // [ ] <-.
PARTITION_H, // [-] |
PARTITION_V, // [|] |
PARTITION_SPLIT, // [+] --'
};
enum InterPredMode {
NEARESTMV = 10,
NEARMV = 11,
ZEROMV = 12,
NEWMV = 13,
};
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 void (*vp9_mc_func)(uint8_t *dst, const uint8_t *ref,
ptrdiff_t dst_stride,
ptrdiff_t ref_stride,
int h, int mx, int my);
typedef struct VP9DSPContext {
/*
* dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32
* dimension 2: intra prediction modes
*
* dst/left/top is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
* stride is aligned by 16 pixels
* top[-1] is top/left; top[4,7] is top-right for 4x4
*/
// FIXME(rbultje) maybe replace left/top pointers with HAVE_TOP/
// HAVE_LEFT/HAVE_TOPRIGHT flags instead, and then handle it in-place?
// also needs to fit in with what h264/vp8/etc do
void (*intra_pred[N_TXFM_SIZES][N_INTRA_PRED_MODES])(uint8_t *dst,
ptrdiff_t stride,
const uint8_t *left,
const uint8_t *top);
/*
* dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32, 4=lossless (3-4=dct only)
* dimension 2: 0=dct/dct, 1=dct/adst, 2=adst/dct, 3=adst/adst
*
* dst is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
* stride is aligned by 16 pixels
* block is 16-byte aligned
* eob indicates the position (+1) of the last non-zero coefficient,
* in scan-order. This can be used to write faster versions, e.g. a
* dc-only 4x4/8x8/16x16/32x32, or a 4x4-only (eob<10) 8x8/16x16/32x32,
* etc.
*/
// FIXME also write idct_add_block() versions for whole (inter) pred
// blocks, so we can do 2 4x4s at once
void (*itxfm_add[N_TXFM_SIZES + 1][N_TXFM_TYPES])(uint8_t *dst,
ptrdiff_t stride,
int16_t *block, int eob);
/*
* dimension 1: width of filter (0=4, 1=8, 2=16)
* dimension 2: 0=col-edge filter (h), 1=row-edge filter (v)
*
* dst/stride are aligned by 8
*/
void (*loop_filter_8[3][2])(uint8_t *dst, ptrdiff_t stride,
int mb_lim, int lim, int hev_thr);
/*
* dimension 1: 0=col-edge filter (h), 1=row-edge filter (v)
*
* The width of filter is assumed to be 16; dst/stride are aligned by 16
*/
void (*loop_filter_16[2])(uint8_t *dst, ptrdiff_t stride,
int mb_lim, int lim, int hev_thr);
/*
* dimension 1/2: width of filter (0=4, 1=8) for each filter half
* dimension 3: 0=col-edge filter (h), 1=row-edge filter (v)
*
* dst/stride are aligned by operation size
* this basically calls loop_filter[d1][d3][0](), followed by
* loop_filter[d2][d3][0]() on the next 8 pixels
* mb_lim/lim/hev_thr contain two values in the lowest two bytes of the
* integer.
*/
// FIXME perhaps a mix4 that operates on 32px (for AVX2)
void (*loop_filter_mix2[2][2][2])(uint8_t *dst, ptrdiff_t stride,
int mb_lim, int lim, int hev_thr);
/*
* dimension 1: hsize (0: 64, 1: 32, 2: 16, 3: 8, 4: 4)
* dimension 2: filter type (0: smooth, 1: regular, 2: sharp, 3: bilin)
* dimension 3: averaging type (0: put, 1: avg)
* dimension 4: x subpel interpolation (0: none, 1: 8tap/bilin)
* dimension 5: y subpel interpolation (1: none, 1: 8tap/bilin)
*
* dst/stride are aligned by hsize
*/
vp9_mc_func mc[5][4][2][2][2];
} VP9DSPContext;
enum CompPredMode {
PRED_SINGLEREF,
PRED_COMPREF,
PRED_SWITCHABLE,
};
typedef struct VP9MVRefPair {
VP56mv mv[2];
int8_t ref[2];
} VP9MVRefPair;
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;
enum BlockLevel {
BL_64X64,
BL_32X32,
BL_16X16,
BL_8X8,
};
enum BlockSize {
BS_64x64,
BS_64x32,
BS_32x64,
BS_32x32,
BS_32x16,
BS_16x32,
BS_16x16,
BS_16x8,
BS_8x16,
BS_8x8,
BS_8x4,
BS_4x8,
BS_4x4,
N_BS_SIZES,
};
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;
int row, row7, col, col7;
uint8_t *dst[3];
ptrdiff_t y_stride, uv_stride;
} VP9Block;
typedef struct VP9Context {
VP9DSPContext dsp;
VideoDSPContext vdsp;
GetBitContext gb;
VP56RangeCoder c;
VP56RangeCoder *c_b;
unsigned c_b_size;
VP9Block b;
// bitstream header
uint8_t profile;
uint8_t keyframe, last_keyframe;
uint8_t invisible;
uint8_t use_last_frame_mvs;
uint8_t errorres;
uint8_t colorspace;
uint8_t fullrange;
uint8_t intraonly;
uint8_t resetctx;
uint8_t refreshrefmask;
uint8_t highprecisionmvs;
enum FilterMode filtermode;
uint8_t allowcompinter;
uint8_t fixcompref;
uint8_t refreshctx;
uint8_t parallelmode;
uint8_t framectxid;
uint8_t refidx[3];
uint8_t signbias[3];
uint8_t varcompref[2];
AVFrame *refs[8];
AVFrame *cur_frame;
struct {
uint8_t level;
int8_t sharpness;
uint8_t lim_lut[64];
uint8_t mblim_lut[64];
} filter;
struct {
uint8_t enabled;
int8_t mode[2];
int8_t ref[4];
} lf_delta;
uint8_t yac_qi;
int8_t ydc_qdelta, uvdc_qdelta, uvac_qdelta;
uint8_t lossless;
struct {
uint8_t enabled;
uint8_t temporal;
uint8_t absolute_vals;
uint8_t update_map;
struct {
uint8_t q_enabled;
uint8_t lf_enabled;
uint8_t ref_enabled;
uint8_t skip_enabled;
uint8_t ref_val;
int16_t q_val;
int8_t lf_val;
int16_t qmul[2][2];
uint8_t lflvl[4][2];
} feat[8];
} segmentation;
struct {
unsigned log2_tile_cols, log2_tile_rows;
unsigned tile_cols, tile_rows;
unsigned tile_row_start, tile_row_end, tile_col_start, tile_col_end;
} tiling;
unsigned sb_cols, sb_rows, rows, cols;
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];
uint8_t seg[7];
uint8_t segpred[3];
} 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;
enum TxfmMode txfmmode;
enum CompPredMode comppredmode;
// contextual (left/above) cache
uint8_t left_partition_ctx[8], *above_partition_ctx;
uint8_t left_mode_ctx[16], *above_mode_ctx;
// FIXME maybe merge some of the below in a flags field?
uint8_t left_y_nnz_ctx[16], *above_y_nnz_ctx;
uint8_t left_uv_nnz_ctx[2][8], *above_uv_nnz_ctx[2];
uint8_t left_skip_ctx[8], *above_skip_ctx; // 1bit
uint8_t left_txfm_ctx[8], *above_txfm_ctx; // 2bit
uint8_t left_segpred_ctx[8], *above_segpred_ctx; // 1bit
uint8_t left_intra_ctx[8], *above_intra_ctx; // 1bit
uint8_t left_comp_ctx[8], *above_comp_ctx; // 1bit
uint8_t left_ref_ctx[8], *above_ref_ctx; // 2bit
uint8_t left_filter_ctx[8], *above_filter_ctx;
VP56mv left_mv_ctx[16][2], (*above_mv_ctx)[2];
// whole-frame cache
uint8_t *intra_pred_data[3];
uint8_t *segmentation_map;
VP9MVRefPair *mv[2];
VP9Filter *lflvl;
DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[71 * 80];
// block reconstruction intermediates
DECLARE_ALIGNED(32, int16_t, block)[4096];
DECLARE_ALIGNED(32, int16_t, uvblock)[2][1024];
uint8_t eob[256];
uint8_t uveob[2][64];
VP56mv min_mv, max_mv;
DECLARE_ALIGNED(32, uint8_t, tmp_y)[64 * 64];
DECLARE_ALIGNED(32, uint8_t, tmp_uv)[2][32 * 32];
} VP9Context;
void ff_vp9dsp_init(VP9DSPContext *dsp);
void ff_vp9dsp_init_x86(VP9DSPContext *dsp);
void ff_vp9_fill_mv(VP9Context *s, VP56mv *mv, int mode, int sb);
void ff_vp9_adapt_probs(VP9Context *s);
int ff_vp9_decode_block(AVCodecContext *avctx, int row, int col,
VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
enum BlockLevel bl, enum BlockPartition bp);
#endif /* AVCODEC_VP9_H */
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