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-rw-r--r--ffmpeg/libavcodec/vp56.h401
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diff --git a/ffmpeg/libavcodec/vp56.h b/ffmpeg/libavcodec/vp56.h
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--- a/ffmpeg/libavcodec/vp56.h
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-/*
- * 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 "dsputil.h"
-#include "get_bits.h"
-#include "hpeldsp.h"
-#include "bytestream.h"
-#include "h264chroma.h"
-#include "videodsp.h"
-#include "vp3dsp.h"
-#include "vp56dsp.h"
-
-typedef struct vp56_context VP56Context;
-
-typedef enum {
- VP56_FRAME_NONE =-1,
- VP56_FRAME_CURRENT = 0,
- VP56_FRAME_PREVIOUS = 1,
- VP56_FRAME_GOLDEN = 2,
- VP56_FRAME_GOLDEN2 = 3,
-} 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, int stride,
- VP56mv mv, int mask, int select, int luma);
-typedef void (*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 VP56RangeCoder {
- int high;
- int bits; /* stored negated (i.e. negative "bits" is a positive number of
- bits left) in order to eliminate a negate in cache refilling */
- const uint8_t *buffer;
- const uint8_t *end;
- unsigned int code_word;
-} VP56RangeCoder;
-
-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 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;
- VP56RangeCoder c;
- VP56RangeCoder cc;
- VP56RangeCoder *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];
-
- /* 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;
-
- 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 */
- int 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 ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha);
-int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
- int flip, int has_alpha);
-int ff_vp56_free(AVCodecContext *avctx);
-int ff_vp56_free_context(VP56Context *s);
-void ff_vp56_init_dequant(VP56Context *s, int quantizer);
-int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
- AVPacket *avpkt);
-
-
-/**
- * vp56 specific range coder implementation
- */
-
-extern const uint8_t ff_vp56_norm_shift[256];
-void ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size);
-
-static av_always_inline unsigned int vp56_rac_renorm(VP56RangeCoder *c)
-{
- int shift = ff_vp56_norm_shift[c->high];
- int bits = c->bits;
- unsigned int code_word = c->code_word;
-
- c->high <<= shift;
- code_word <<= shift;
- bits += shift;
- if(bits >= 0 && c->buffer < c->end) {
- code_word |= bytestream_get_be16(&c->buffer) << bits;
- bits -= 16;
- }
- c->bits = bits;
- return code_word;
-}
-
-#if ARCH_ARM
-#include "arm/vp56_arith.h"
-#elif ARCH_X86
-#include "x86/vp56_arith.h"
-#endif
-
-#ifndef vp56_rac_get_prob
-#define vp56_rac_get_prob vp56_rac_get_prob
-static av_always_inline int vp56_rac_get_prob(VP56RangeCoder *c, uint8_t prob)
-{
- unsigned int code_word = vp56_rac_renorm(c);
- unsigned int low = 1 + (((c->high - 1) * prob) >> 8);
- unsigned int low_shift = low << 16;
- int bit = code_word >= low_shift;
-
- c->high = bit ? c->high - low : low;
- c->code_word = bit ? code_word - low_shift : code_word;
-
- return bit;
-}
-#endif
-
-#ifndef vp56_rac_get_prob_branchy
-// branchy variant, to be used where there's a branch based on the bit decoded
-static av_always_inline int vp56_rac_get_prob_branchy(VP56RangeCoder *c, int prob)
-{
- unsigned long code_word = vp56_rac_renorm(c);
- unsigned low = 1 + (((c->high - 1) * prob) >> 8);
- unsigned low_shift = low << 16;
-
- if (code_word >= low_shift) {
- c->high -= low;
- c->code_word = code_word - low_shift;
- return 1;
- }
-
- c->high = low;
- c->code_word = code_word;
- return 0;
-}
-#endif
-
-static av_always_inline int vp56_rac_get(VP56RangeCoder *c)
-{
- unsigned int code_word = vp56_rac_renorm(c);
- /* equiprobable */
- int low = (c->high + 1) >> 1;
- unsigned int low_shift = low << 16;
- int bit = code_word >= low_shift;
- if (bit) {
- c->high -= low;
- code_word -= low_shift;
- } else {
- c->high = low;
- }
-
- c->code_word = code_word;
- return bit;
-}
-
-// rounding is different than vp56_rac_get, is vp56_rac_get wrong?
-static av_always_inline int vp8_rac_get(VP56RangeCoder *c)
-{
- return vp56_rac_get_prob(c, 128);
-}
-
-static av_unused int vp56_rac_gets(VP56RangeCoder *c, int bits)
-{
- int value = 0;
-
- while (bits--) {
- value = (value << 1) | vp56_rac_get(c);
- }
-
- return value;
-}
-
-static av_unused int vp8_rac_get_uint(VP56RangeCoder *c, int bits)
-{
- int value = 0;
-
- while (bits--) {
- value = (value << 1) | vp8_rac_get(c);
- }
-
- return value;
-}
-
-// fixme: add 1 bit to all the calls to this?
-static av_unused int vp8_rac_get_sint(VP56RangeCoder *c, int bits)
-{
- int v;
-
- if (!vp8_rac_get(c))
- return 0;
-
- v = vp8_rac_get_uint(c, bits);
-
- if (vp8_rac_get(c))
- v = -v;
-
- return v;
-}
-
-// P(7)
-static av_unused int vp56_rac_gets_nn(VP56RangeCoder *c, int bits)
-{
- int v = vp56_rac_gets(c, 7) << 1;
- return v + !v;
-}
-
-static av_unused int vp8_rac_get_nn(VP56RangeCoder *c)
-{
- int v = vp8_rac_get_uint(c, 7) << 1;
- return v + !v;
-}
-
-static av_always_inline
-int vp56_rac_get_tree(VP56RangeCoder *c,
- const VP56Tree *tree,
- const uint8_t *probs)
-{
- while (tree->val > 0) {
- if (vp56_rac_get_prob(c, probs[tree->prob_idx]))
- tree += tree->val;
- else
- tree++;
- }
- return -tree->val;
-}
-
-// how probabilities are associated with decisions is different I think
-// well, the new scheme fits in the old but this way has one fewer branches per decision
-static av_always_inline int vp8_rac_get_tree(VP56RangeCoder *c, const int8_t (*tree)[2],
- const uint8_t *probs)
-{
- int i = 0;
-
- do {
- i = tree[i][vp56_rac_get_prob(c, probs[i])];
- } while (i > 0);
-
- return -i;
-}
-
-// DCTextra
-static av_always_inline int vp8_rac_get_coeff(VP56RangeCoder *c, const uint8_t *prob)
-{
- int v = 0;
-
- do {
- v = (v<<1) + vp56_rac_get_prob(c, *prob++);
- } while (*prob);
-
- return v;
-}
-
-#endif /* AVCODEC_VP56_H */
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