1
0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-07 11:13:41 +02:00
FFmpeg/libavcodec/vp56.h
Andreas Rheinhardt 6f7d3bde11 avcodec/vp8, vp9: Avoid using VP56mv and VP56Frame in VP8/9
Instead replace VP56mv by new and identical structures VP8mv and VP9mv.
Also replace VP56Frame by VP8FrameType in vp8.h and use that
in VP8 code. Also remove VP56_FRAME_GOLDEN2, as this has only
been used by VP8, and use VP8_FRAME_ALTREF as replacement for
its usage in VP8 as this is more in line with VP8 verbiage.

This allows to remove all inclusions of vp56.h from everything
that is not VP5/6. This also removes implicit inclusions
of hpeldsp.h, h264chroma.h, vp3dsp.h and vp56dsp.h from all VP8/9
files.

(This also fixes a build issue: If one compiles with -O0 and disables
everything except the VP8-VAAPI encoder, the file containing
ff_vpx_norm_shift is not compiled, yet this is used implicitly
by vp56_rac_gets_nn() which is defined in vp56.h; it is unused
by the VP8-VAAPI encoder and declared as av_unused, yet with -O0
unused noninline functions are not optimized away, leading to
linking failures. With this patch, said function is not included
in vaapi_encode_vp8.c any more.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-07-28 03:49:54 +02:00

257 lines
7.8 KiB
C

/*
* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
* 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
*/
/**
* @file
* VP5 and VP6 compatible video decoder (common features)
*/
#ifndef AVCODEC_VP56_H
#define AVCODEC_VP56_H
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "get_bits.h"
#include "hpeldsp.h"
#include "h264chroma.h"
#include "videodsp.h"
#include "vp3dsp.h"
#include "vp56dsp.h"
#include "vpx_rac.h"
typedef struct vp56_context VP56Context;
typedef enum {
VP56_FRAME_NONE =-1,
VP56_FRAME_CURRENT = 0,
VP56_FRAME_PREVIOUS = 1,
VP56_FRAME_GOLDEN = 2,
} VP56Frame;
typedef enum {
VP56_MB_INTER_NOVEC_PF = 0, /**< Inter MB, no vector, from previous frame */
VP56_MB_INTRA = 1, /**< Intra MB */
VP56_MB_INTER_DELTA_PF = 2, /**< Inter MB, above/left vector + delta, from previous frame */
VP56_MB_INTER_V1_PF = 3, /**< Inter MB, first vector, from previous frame */
VP56_MB_INTER_V2_PF = 4, /**< Inter MB, second vector, from previous frame */
VP56_MB_INTER_NOVEC_GF = 5, /**< Inter MB, no vector, from golden frame */
VP56_MB_INTER_DELTA_GF = 6, /**< Inter MB, above/left vector + delta, from golden frame */
VP56_MB_INTER_4V = 7, /**< Inter MB, 4 vectors, from previous frame */
VP56_MB_INTER_V1_GF = 8, /**< Inter MB, first vector, from golden frame */
VP56_MB_INTER_V2_GF = 9, /**< Inter MB, second vector, from golden frame */
} VP56mb;
typedef struct VP56Tree {
int8_t val;
int8_t prob_idx;
} VP56Tree;
typedef struct VP56mv {
DECLARE_ALIGNED(4, int16_t, x);
int16_t y;
} VP56mv;
#define VP56_SIZE_CHANGE 1
typedef void (*VP56ParseVectorAdjustment)(VP56Context *s,
VP56mv *vect);
typedef void (*VP56Filter)(VP56Context *s, uint8_t *dst, uint8_t *src,
int offset1, int offset2, ptrdiff_t stride,
VP56mv mv, int mask, int select, int luma);
typedef int (*VP56ParseCoeff)(VP56Context *s);
typedef void (*VP56DefaultModelsInit)(VP56Context *s);
typedef void (*VP56ParseVectorModels)(VP56Context *s);
typedef int (*VP56ParseCoeffModels)(VP56Context *s);
typedef int (*VP56ParseHeader)(VP56Context *s, const uint8_t *buf,
int buf_size);
typedef struct VP56RefDc {
uint8_t not_null_dc;
VP56Frame ref_frame;
int16_t dc_coeff;
} VP56RefDc;
typedef struct VP56Macroblock {
uint8_t type;
VP56mv mv;
} VP56Macroblock;
typedef struct VP56Model {
uint8_t coeff_reorder[64]; /* used in vp6 only */
uint8_t coeff_index_to_pos[64]; /* used in vp6 only */
uint8_t coeff_index_to_idct_selector[64]; /* used in vp6 only */
uint8_t vector_sig[2]; /* delta sign */
uint8_t vector_dct[2]; /* delta coding types */
uint8_t vector_pdi[2][2]; /* predefined delta init */
uint8_t vector_pdv[2][7]; /* predefined delta values */
uint8_t vector_fdv[2][8]; /* 8 bit delta value definition */
uint8_t coeff_dccv[2][11]; /* DC coeff value */
uint8_t coeff_ract[2][3][6][11]; /* Run/AC coding type and AC coeff value */
uint8_t coeff_acct[2][3][3][6][5];/* vp5 only AC coding type for coding group < 3 */
uint8_t coeff_dcct[2][36][5]; /* DC coeff coding type */
uint8_t coeff_runv[2][14]; /* run value (vp6 only) */
uint8_t mb_type[3][10][10]; /* model for decoding MB type */
uint8_t mb_types_stats[3][10][2];/* contextual, next MB type stats */
} VP56Model;
struct vp56_context {
AVCodecContext *avctx;
H264ChromaContext h264chroma;
HpelDSPContext hdsp;
VideoDSPContext vdsp;
VP3DSPContext vp3dsp;
VP56DSPContext vp56dsp;
uint8_t idct_scantable[64];
AVFrame *frames[4];
uint8_t *edge_emu_buffer_alloc;
uint8_t *edge_emu_buffer;
VPXRangeCoder c;
VPXRangeCoder cc;
VPXRangeCoder *ccp;
int sub_version;
/* frame info */
int golden_frame;
int plane_width[4];
int plane_height[4];
int mb_width; /* number of horizontal MB */
int mb_height; /* number of vertical MB */
int block_offset[6];
int quantizer;
uint16_t dequant_dc;
uint16_t dequant_ac;
/* DC predictors management */
VP56RefDc *above_blocks;
VP56RefDc left_block[4];
int above_block_idx[6];
int16_t prev_dc[3][3]; /* [plan][ref_frame] */
/* blocks / macroblock */
VP56mb mb_type;
VP56Macroblock *macroblocks;
DECLARE_ALIGNED(16, int16_t, block_coeff)[6][64];
int idct_selector[6];
/* motion vectors */
VP56mv mv[6]; /* vectors for each block in MB */
VP56mv vector_candidate[2];
int vector_candidate_pos;
/* filtering hints */
int filter_header; /* used in vp6 only */
int deblock_filtering;
int filter_selection;
int filter_mode;
int max_vector_length;
int sample_variance_threshold;
DECLARE_ALIGNED(8, int, bounding_values_array)[256];
uint8_t coeff_ctx[4][64]; /* used in vp5 only */
uint8_t coeff_ctx_last[4]; /* used in vp5 only */
int has_alpha;
/* upside-down flipping hints */
int flip; /* are we flipping ? */
int frbi; /* first row block index in MB */
int srbi; /* second row block index in MB */
ptrdiff_t stride[4]; /* stride for each plan */
const uint8_t *vp56_coord_div;
VP56ParseVectorAdjustment parse_vector_adjustment;
VP56Filter filter;
VP56ParseCoeff parse_coeff;
VP56DefaultModelsInit default_models_init;
VP56ParseVectorModels parse_vector_models;
VP56ParseCoeffModels parse_coeff_models;
VP56ParseHeader parse_header;
/* for "slice" parallelism between YUV and A */
VP56Context *alpha_context;
VP56Model *modelp;
VP56Model model;
/* huffman decoding */
int use_huffman;
GetBitContext gb;
VLC dccv_vlc[2];
VLC runv_vlc[2];
VLC ract_vlc[2][3][6];
unsigned int nb_null[2][2]; /* number of consecutive NULL DC/AC */
int have_undamaged_frame;
int discard_frame;
};
/**
* Initializes an VP56Context. Expects its caller to clean up
* in case of error.
*/
int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
int flip, int has_alpha);
int ff_vp56_free_context(VP56Context *s);
void ff_vp56_init_dequant(VP56Context *s, int quantizer);
int ff_vp56_decode_frame(AVCodecContext *avctx, AVFrame *frame,
int *got_frame, AVPacket *avpkt);
/**
* vp56 specific range coder implementation
*/
static int vp56_rac_gets(VPXRangeCoder *c, int bits)
{
int value = 0;
while (bits--) {
value = (value << 1) | vpx_rac_get(c);
}
return value;
}
// P(7)
static av_unused int vp56_rac_gets_nn(VPXRangeCoder *c, int bits)
{
int v = vp56_rac_gets(c, 7) << 1;
return v + !v;
}
static av_always_inline
int vp56_rac_get_tree(VPXRangeCoder *c,
const VP56Tree *tree,
const uint8_t *probs)
{
while (tree->val > 0) {
if (vpx_rac_get_prob_branchy(c, probs[tree->prob_idx]))
tree += tree->val;
else
tree++;
}
return -tree->val;
}
#endif /* AVCODEC_VP56_H */