h264_cavlc.c 42.8 KB
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/*
 * H.26L/H.264/AVC/JVT/14496-10/... cavlc bitstream decoding
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * 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
 */

/**
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 * @file
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 * H.264 / AVC / MPEG4 part10 cavlc bitstream decoding.
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

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#define CABAC(h) 0
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#define UNCHECKED_BITSTREAM_READER 1
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#include "internal.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "h264.h"
#include "h264data.h" // FIXME FIXME FIXME
#include "h264_mvpred.h"
#include "golomb.h"
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#include "libavutil/avassert.h"
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static const uint8_t golomb_to_inter_cbp_gray[16]={
 0, 1, 2, 4, 8, 3, 5,10,12,15, 7,11,13,14, 6, 9,
};

static const uint8_t golomb_to_intra4x4_cbp_gray[16]={
15, 0, 7,11,13,14, 3, 5,10,12, 1, 2, 4, 8, 6, 9,
};

static const uint8_t chroma_dc_coeff_token_len[4*5]={
 2, 0, 0, 0,
 6, 1, 0, 0,
 6, 6, 3, 0,
 6, 7, 7, 6,
 6, 8, 8, 7,
};

static const uint8_t chroma_dc_coeff_token_bits[4*5]={
 1, 0, 0, 0,
 7, 1, 0, 0,
 4, 6, 1, 0,
 3, 3, 2, 5,
 2, 3, 2, 0,
};

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static const uint8_t chroma422_dc_coeff_token_len[4*9]={
  1,  0,  0,  0,
  7,  2,  0,  0,
  7,  7,  3,  0,
  9,  7,  7,  5,
  9,  9,  7,  6,
 10, 10,  9,  7,
 11, 11, 10,  7,
 12, 12, 11, 10,
 13, 12, 12, 11,
};

static const uint8_t chroma422_dc_coeff_token_bits[4*9]={
  1,   0,  0, 0,
 15,   1,  0, 0,
 14,  13,  1, 0,
  7,  12, 11, 1,
  6,   5, 10, 1,
  7,   6,  4, 9,
  7,   6,  5, 8,
  7,   6,  5, 4,
  7,   5,  4, 4,
};

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static const uint8_t coeff_token_len[4][4*17]={
{
     1, 0, 0, 0,
     6, 2, 0, 0,     8, 6, 3, 0,     9, 8, 7, 5,    10, 9, 8, 6,
    11,10, 9, 7,    13,11,10, 8,    13,13,11, 9,    13,13,13,10,
    14,14,13,11,    14,14,14,13,    15,15,14,14,    15,15,15,14,
    16,15,15,15,    16,16,16,15,    16,16,16,16,    16,16,16,16,
},
{
     2, 0, 0, 0,
     6, 2, 0, 0,     6, 5, 3, 0,     7, 6, 6, 4,     8, 6, 6, 4,
     8, 7, 7, 5,     9, 8, 8, 6,    11, 9, 9, 6,    11,11,11, 7,
    12,11,11, 9,    12,12,12,11,    12,12,12,11,    13,13,13,12,
    13,13,13,13,    13,14,13,13,    14,14,14,13,    14,14,14,14,
},
{
     4, 0, 0, 0,
     6, 4, 0, 0,     6, 5, 4, 0,     6, 5, 5, 4,     7, 5, 5, 4,
     7, 5, 5, 4,     7, 6, 6, 4,     7, 6, 6, 4,     8, 7, 7, 5,
     8, 8, 7, 6,     9, 8, 8, 7,     9, 9, 8, 8,     9, 9, 9, 8,
    10, 9, 9, 9,    10,10,10,10,    10,10,10,10,    10,10,10,10,
},
{
     6, 0, 0, 0,
     6, 6, 0, 0,     6, 6, 6, 0,     6, 6, 6, 6,     6, 6, 6, 6,
     6, 6, 6, 6,     6, 6, 6, 6,     6, 6, 6, 6,     6, 6, 6, 6,
     6, 6, 6, 6,     6, 6, 6, 6,     6, 6, 6, 6,     6, 6, 6, 6,
     6, 6, 6, 6,     6, 6, 6, 6,     6, 6, 6, 6,     6, 6, 6, 6,
}
};

static const uint8_t coeff_token_bits[4][4*17]={
{
     1, 0, 0, 0,
     5, 1, 0, 0,     7, 4, 1, 0,     7, 6, 5, 3,     7, 6, 5, 3,
     7, 6, 5, 4,    15, 6, 5, 4,    11,14, 5, 4,     8,10,13, 4,
    15,14, 9, 4,    11,10,13,12,    15,14, 9,12,    11,10,13, 8,
    15, 1, 9,12,    11,14,13, 8,     7,10, 9,12,     4, 6, 5, 8,
},
{
     3, 0, 0, 0,
    11, 2, 0, 0,     7, 7, 3, 0,     7,10, 9, 5,     7, 6, 5, 4,
     4, 6, 5, 6,     7, 6, 5, 8,    15, 6, 5, 4,    11,14,13, 4,
    15,10, 9, 4,    11,14,13,12,     8,10, 9, 8,    15,14,13,12,
    11,10, 9,12,     7,11, 6, 8,     9, 8,10, 1,     7, 6, 5, 4,
},
{
    15, 0, 0, 0,
    15,14, 0, 0,    11,15,13, 0,     8,12,14,12,    15,10,11,11,
    11, 8, 9,10,     9,14,13, 9,     8,10, 9, 8,    15,14,13,13,
    11,14,10,12,    15,10,13,12,    11,14, 9,12,     8,10,13, 8,
    13, 7, 9,12,     9,12,11,10,     5, 8, 7, 6,     1, 4, 3, 2,
},
{
     3, 0, 0, 0,
     0, 1, 0, 0,     4, 5, 6, 0,     8, 9,10,11,    12,13,14,15,
    16,17,18,19,    20,21,22,23,    24,25,26,27,    28,29,30,31,
    32,33,34,35,    36,37,38,39,    40,41,42,43,    44,45,46,47,
    48,49,50,51,    52,53,54,55,    56,57,58,59,    60,61,62,63,
}
};

static const uint8_t total_zeros_len[16][16]= {
    {1,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9},
    {3,3,3,3,3,4,4,4,4,5,5,6,6,6,6},
    {4,3,3,3,4,4,3,3,4,5,5,6,5,6},
    {5,3,4,4,3,3,3,4,3,4,5,5,5},
    {4,4,4,3,3,3,3,3,4,5,4,5},
    {6,5,3,3,3,3,3,3,4,3,6},
    {6,5,3,3,3,2,3,4,3,6},
    {6,4,5,3,2,2,3,3,6},
    {6,6,4,2,2,3,2,5},
    {5,5,3,2,2,2,4},
    {4,4,3,3,1,3},
    {4,4,2,1,3},
    {3,3,1,2},
    {2,2,1},
    {1,1},
};

static const uint8_t total_zeros_bits[16][16]= {
    {1,3,2,3,2,3,2,3,2,3,2,3,2,3,2,1},
    {7,6,5,4,3,5,4,3,2,3,2,3,2,1,0},
    {5,7,6,5,4,3,4,3,2,3,2,1,1,0},
    {3,7,5,4,6,5,4,3,3,2,2,1,0},
    {5,4,3,7,6,5,4,3,2,1,1,0},
    {1,1,7,6,5,4,3,2,1,1,0},
    {1,1,5,4,3,3,2,1,1,0},
    {1,1,1,3,3,2,2,1,0},
    {1,0,1,3,2,1,1,1},
    {1,0,1,3,2,1,1},
    {0,1,1,2,1,3},
    {0,1,1,1,1},
    {0,1,1,1},
    {0,1,1},
    {0,1},
};

static const uint8_t chroma_dc_total_zeros_len[3][4]= {
    { 1, 2, 3, 3,},
    { 1, 2, 2, 0,},
    { 1, 1, 0, 0,},
};

static const uint8_t chroma_dc_total_zeros_bits[3][4]= {
    { 1, 1, 1, 0,},
    { 1, 1, 0, 0,},
    { 1, 0, 0, 0,},
};

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static const uint8_t chroma422_dc_total_zeros_len[7][8]= {
    { 1, 3, 3, 4, 4, 4, 5, 5 },
    { 3, 2, 3, 3, 3, 3, 3 },
    { 3, 3, 2, 2, 3, 3 },
    { 3, 2, 2, 2, 3 },
    { 2, 2, 2, 2 },
    { 2, 2, 1 },
    { 1, 1 },
};

static const uint8_t chroma422_dc_total_zeros_bits[7][8]= {
    { 1, 2, 3, 2, 3, 1, 1, 0 },
    { 0, 1, 1, 4, 5, 6, 7 },
    { 0, 1, 1, 2, 6, 7 },
    { 6, 0, 1, 2, 7 },
    { 0, 1, 2, 3 },
    { 0, 1, 1 },
    { 0, 1 },
};

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static const uint8_t run_len[7][16]={
    {1,1},
    {1,2,2},
    {2,2,2,2},
    {2,2,2,3,3},
    {2,2,3,3,3,3},
    {2,3,3,3,3,3,3},
    {3,3,3,3,3,3,3,4,5,6,7,8,9,10,11},
};

static const uint8_t run_bits[7][16]={
    {1,0},
    {1,1,0},
    {3,2,1,0},
    {3,2,1,1,0},
    {3,2,3,2,1,0},
    {3,0,1,3,2,5,4},
    {7,6,5,4,3,2,1,1,1,1,1,1,1,1,1},
};

static VLC coeff_token_vlc[4];
static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2];
static const int coeff_token_vlc_tables_size[4]={520,332,280,256};

static VLC chroma_dc_coeff_token_vlc;
static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2];
static const int chroma_dc_coeff_token_vlc_table_size = 256;

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static VLC chroma422_dc_coeff_token_vlc;
static VLC_TYPE chroma422_dc_coeff_token_vlc_table[8192][2];
static const int chroma422_dc_coeff_token_vlc_table_size = 8192;

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static VLC total_zeros_vlc[15];
static VLC_TYPE total_zeros_vlc_tables[15][512][2];
static const int total_zeros_vlc_tables_size = 512;

static VLC chroma_dc_total_zeros_vlc[3];
static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2];
static const int chroma_dc_total_zeros_vlc_tables_size = 8;

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static VLC chroma422_dc_total_zeros_vlc[7];
static VLC_TYPE chroma422_dc_total_zeros_vlc_tables[7][32][2];
static const int chroma422_dc_total_zeros_vlc_tables_size = 32;

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static VLC run_vlc[6];
static VLC_TYPE run_vlc_tables[6][8][2];
static const int run_vlc_tables_size = 8;

static VLC run7_vlc;
static VLC_TYPE run7_vlc_table[96][2];
static const int run7_vlc_table_size = 96;

#define LEVEL_TAB_BITS 8
static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2];

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#define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
#define CHROMA422_DC_COEFF_TOKEN_VLC_BITS 13
#define COEFF_TOKEN_VLC_BITS           8
#define TOTAL_ZEROS_VLC_BITS           9
#define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
#define CHROMA422_DC_TOTAL_ZEROS_VLC_BITS 5
#define RUN_VLC_BITS                   3
#define RUN7_VLC_BITS                  6
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/**
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 * Get the predicted number of non-zero coefficients.
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 * @param n block index
 */
static inline int pred_non_zero_count(H264Context *h, int n){
    const int index8= scan8[n];
    const int left= h->non_zero_count_cache[index8 - 1];
    const int top = h->non_zero_count_cache[index8 - 8];
    int i= left + top;

    if(i<64) i= (i+1)>>1;

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    tprintf(h->avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
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    return i&31;
}

static av_cold void init_cavlc_level_tab(void){
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    int suffix_length;
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    unsigned int i;

    for(suffix_length=0; suffix_length<7; suffix_length++){
        for(i=0; i<(1<<LEVEL_TAB_BITS); i++){
            int prefix= LEVEL_TAB_BITS - av_log2(2*i);

            if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){
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                int level_code = (prefix << suffix_length) +
                    (i >> (av_log2(i) - suffix_length)) - (1 << suffix_length);
                int mask = -(level_code&1);
                level_code = (((2 + level_code) >> 1) ^ mask) - mask;
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                cavlc_level_tab[suffix_length][i][0]= level_code;
                cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length;
            }else if(prefix + 1 <= LEVEL_TAB_BITS){
                cavlc_level_tab[suffix_length][i][0]= prefix+100;
                cavlc_level_tab[suffix_length][i][1]= prefix + 1;
            }else{
                cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100;
                cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS;
            }
        }
    }
}

av_cold void ff_h264_decode_init_vlc(void){
    static int done = 0;

    if (!done) {
        int i;
        int offset;
        done = 1;

        chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
        chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
        init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
                 &chroma_dc_coeff_token_len [0], 1, 1,
                 &chroma_dc_coeff_token_bits[0], 1, 1,
                 INIT_VLC_USE_NEW_STATIC);

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        chroma422_dc_coeff_token_vlc.table = chroma422_dc_coeff_token_vlc_table;
        chroma422_dc_coeff_token_vlc.table_allocated = chroma422_dc_coeff_token_vlc_table_size;
        init_vlc(&chroma422_dc_coeff_token_vlc, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 4*9,
                 &chroma422_dc_coeff_token_len [0], 1, 1,
                 &chroma422_dc_coeff_token_bits[0], 1, 1,
                 INIT_VLC_USE_NEW_STATIC);

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        offset = 0;
        for(i=0; i<4; i++){
            coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
            coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
            init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
                     &coeff_token_len [i][0], 1, 1,
                     &coeff_token_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
            offset += coeff_token_vlc_tables_size[i];
        }
        /*
         * This is a one time safety check to make sure that
         * the packed static coeff_token_vlc table sizes
         * were initialized correctly.
         */
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        av_assert0(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
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        for(i=0; i<3; i++){
            chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
            chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
            init_vlc(&chroma_dc_total_zeros_vlc[i],
                     CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
                     &chroma_dc_total_zeros_len [i][0], 1, 1,
                     &chroma_dc_total_zeros_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
        }
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        for(i=0; i<7; i++){
            chroma422_dc_total_zeros_vlc[i].table = chroma422_dc_total_zeros_vlc_tables[i];
            chroma422_dc_total_zeros_vlc[i].table_allocated = chroma422_dc_total_zeros_vlc_tables_size;
            init_vlc(&chroma422_dc_total_zeros_vlc[i],
                     CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 8,
                     &chroma422_dc_total_zeros_len [i][0], 1, 1,
                     &chroma422_dc_total_zeros_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
        }

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        for(i=0; i<15; i++){
            total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
            total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
            init_vlc(&total_zeros_vlc[i],
                     TOTAL_ZEROS_VLC_BITS, 16,
                     &total_zeros_len [i][0], 1, 1,
                     &total_zeros_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
        }

        for(i=0; i<6; i++){
            run_vlc[i].table = run_vlc_tables[i];
            run_vlc[i].table_allocated = run_vlc_tables_size;
            init_vlc(&run_vlc[i],
                     RUN_VLC_BITS, 7,
                     &run_len [i][0], 1, 1,
                     &run_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
        }
        run7_vlc.table = run7_vlc_table,
        run7_vlc.table_allocated = run7_vlc_table_size;
        init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
                 &run_len [6][0], 1, 1,
                 &run_bits[6][0], 1, 1,
                 INIT_VLC_USE_NEW_STATIC);

        init_cavlc_level_tab();
    }
}

/**
 *
 */
static inline int get_level_prefix(GetBitContext *gb){
    unsigned int buf;
    int log;

    OPEN_READER(re, gb);
    UPDATE_CACHE(re, gb);
    buf=GET_CACHE(re, gb);

    log= 32 - av_log2(buf);
#ifdef TRACE
    print_bin(buf>>(32-log), log);
    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
#endif

    LAST_SKIP_BITS(re, gb, log);
    CLOSE_READER(re, gb);

    return log-1;
}

/**
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 * Decode a residual block.
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 * @param n block index
 * @param scantable scantable
 * @param max_coeff number of coefficients in the block
 * @return <0 if an error occurred
 */
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static int decode_residual(H264Context *h, GetBitContext *gb, int16_t *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
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    static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3};
    int level[16];
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    int zeros_left, coeff_token, total_coeff, i, trailing_ones, run_before;
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    //FIXME put trailing_onex into the context

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    if(max_coeff <= 8){
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        if (max_coeff == 4)
            coeff_token = get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
        else
            coeff_token = get_vlc2(gb, chroma422_dc_coeff_token_vlc.table, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 1);
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        total_coeff= coeff_token>>2;
    }else{
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        if(n >= LUMA_DC_BLOCK_INDEX){
            total_coeff= pred_non_zero_count(h, (n - LUMA_DC_BLOCK_INDEX)*16);
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            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
            total_coeff= coeff_token>>2;
        }else{
            total_coeff= pred_non_zero_count(h, n);
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
            total_coeff= coeff_token>>2;
        }
    }
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    h->non_zero_count_cache[ scan8[n] ]= total_coeff;
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    //FIXME set last_non_zero?

    if(total_coeff==0)
        return 0;
    if(total_coeff > (unsigned)max_coeff) {
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        av_log(h->avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", h->mb_x, h->mb_y, total_coeff);
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        return -1;
    }

    trailing_ones= coeff_token&3;
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    tprintf(h->avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
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    av_assert2(total_coeff<=16);
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    i = show_bits(gb, 3);
    skip_bits(gb, trailing_ones);
    level[0] = 1-((i&4)>>1);
    level[1] = 1-((i&2)   );
    level[2] = 1-((i&1)<<1);

    if(trailing_ones<total_coeff) {
        int mask, prefix;
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        int suffix_length = total_coeff > 10 & trailing_ones < 3;
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        int bitsi= show_bits(gb, LEVEL_TAB_BITS);
        int level_code= cavlc_level_tab[suffix_length][bitsi][0];

        skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
        if(level_code >= 100){
            prefix= level_code - 100;
            if(prefix == LEVEL_TAB_BITS)
                prefix += get_level_prefix(gb);

            //first coefficient has suffix_length equal to 0 or 1
            if(prefix<14){ //FIXME try to build a large unified VLC table for all this
                if(suffix_length)
                    level_code= (prefix<<1) + get_bits1(gb); //part
                else
                    level_code= prefix; //part
            }else if(prefix==14){
                if(suffix_length)
                    level_code= (prefix<<1) + get_bits1(gb); //part
                else
                    level_code= prefix + get_bits(gb, 4); //part
            }else{
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                level_code= 30;
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                if(prefix>=16){
                    if(prefix > 25+3){
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                        av_log(h->avctx, AV_LOG_ERROR, "Invalid level prefix\n");
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                        return -1;
                    }
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                    level_code += (1<<(prefix-3))-4096;
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                }
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                level_code += get_bits(gb, prefix-3); //part
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            }

            if(trailing_ones < 3) level_code += 2;

            suffix_length = 2;
            mask= -(level_code&1);
            level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
        }else{
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            level_code += ((level_code>>31)|1) & -(trailing_ones < 3);
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533
            suffix_length = 1 + (level_code + 3U > 6U);
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            level[trailing_ones]= level_code;
        }

        //remaining coefficients have suffix_length > 0
        for(i=trailing_ones+1;i<total_coeff;i++) {
            static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
            int bitsi= show_bits(gb, LEVEL_TAB_BITS);
            level_code= cavlc_level_tab[suffix_length][bitsi][0];

            skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
            if(level_code >= 100){
                prefix= level_code - 100;
                if(prefix == LEVEL_TAB_BITS){
                    prefix += get_level_prefix(gb);
                }
                if(prefix<15){
                    level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
                }else{
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                    level_code = 15<<suffix_length;
                    if (prefix>=16) {
                        if(prefix > 25+3){
                            av_log(h->avctx, AV_LOG_ERROR, "Invalid level prefix\n");
                            return AVERROR_INVALIDDATA;
                        }
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                        level_code += (1<<(prefix-3))-4096;
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                    }
                    level_code += get_bits(gb, prefix-3);
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                }
                mask= -(level_code&1);
                level_code= (((2+level_code)>>1) ^ mask) - mask;
            }
            level[i]= level_code;
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            suffix_length+= suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length];
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        }
    }

    if(total_coeff == max_coeff)
        zeros_left=0;
    else{
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        if (max_coeff <= 8) {
            if (max_coeff == 4)
                zeros_left = get_vlc2(gb, (chroma_dc_total_zeros_vlc-1)[total_coeff].table,
                                      CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
            else
                zeros_left = get_vlc2(gb, (chroma422_dc_total_zeros_vlc-1)[total_coeff].table,
                                      CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 1);
        } else {
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            zeros_left= get_vlc2(gb, (total_zeros_vlc-1)[ total_coeff ].table, TOTAL_ZEROS_VLC_BITS, 1);
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        }
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    }

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#define STORE_BLOCK(type) \
    scantable += zeros_left + total_coeff - 1; \
    if(n >= LUMA_DC_BLOCK_INDEX){ \
        ((type*)block)[*scantable] = level[0]; \
        for(i=1;i<total_coeff && zeros_left > 0;i++) { \
            if(zeros_left < 7) \
                run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1); \
            else \
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \
            zeros_left -= run_before; \
            scantable -= 1 + run_before; \
            ((type*)block)[*scantable]= level[i]; \
        } \
        for(;i<total_coeff;i++) { \
            scantable--; \
            ((type*)block)[*scantable]= level[i]; \
        } \
    }else{ \
        ((type*)block)[*scantable] = ((int)(level[0] * qmul[*scantable] + 32))>>6; \
        for(i=1;i<total_coeff && zeros_left > 0;i++) { \
            if(zeros_left < 7) \
                run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1); \
            else \
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \
            zeros_left -= run_before; \
            scantable -= 1 + run_before; \
            ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \
        } \
        for(;i<total_coeff;i++) { \
            scantable--; \
            ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \
        } \
    }

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    if (h->pixel_shift) {
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        STORE_BLOCK(int32_t)
    } else {
        STORE_BLOCK(int16_t)
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    }

    if(zeros_left<0){
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        av_log(h->avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", h->mb_x, h->mb_y);
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        return -1;
    }

    return 0;
}

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static av_always_inline int decode_luma_residual(H264Context *h, GetBitContext *gb, const uint8_t *scan, const uint8_t *scan8x8, int pixel_shift, int mb_type, int cbp, int p){
    int i4x4, i8x8;
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    int qscale = p == 0 ? h->qscale : h->chroma_qp[p-1];
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    if(IS_INTRA16x16(mb_type)){
        AV_ZERO128(h->mb_luma_dc[p]+0);
        AV_ZERO128(h->mb_luma_dc[p]+8);
        AV_ZERO128(h->mb_luma_dc[p]+16);
        AV_ZERO128(h->mb_luma_dc[p]+24);
        if( decode_residual(h, h->intra_gb_ptr, h->mb_luma_dc[p], LUMA_DC_BLOCK_INDEX+p, scan, NULL, 16) < 0){
            return -1; //FIXME continue if partitioned and other return -1 too
        }

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        av_assert2((cbp&15) == 0 || (cbp&15) == 15);
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        if(cbp&15){
            for(i8x8=0; i8x8<4; i8x8++){
                for(i4x4=0; i4x4<4; i4x4++){
                    const int index= i4x4 + 4*i8x8 + p*16;
                    if( decode_residual(h, h->intra_gb_ptr, h->mb + (16*index << pixel_shift),
                        index, scan + 1, h->dequant4_coeff[p][qscale], 15) < 0 ){
                        return -1;
                    }
                }
            }
            return 0xf;
        }else{
            fill_rectangle(&h->non_zero_count_cache[scan8[p*16]], 4, 4, 8, 0, 1);
            return 0;
        }
    }else{
        int cqm = (IS_INTRA( mb_type ) ? 0:3)+p;
        /* For CAVLC 4:4:4, we need to keep track of the luma 8x8 CBP for deblocking nnz purposes. */
        int new_cbp = 0;
        for(i8x8=0; i8x8<4; i8x8++){
            if(cbp & (1<<i8x8)){
                if(IS_8x8DCT(mb_type)){
Diego Biurrun's avatar
Diego Biurrun committed
669
                    int16_t *buf = &h->mb[64*i8x8+256*p << pixel_shift];
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                    uint8_t *nnz;
                    for(i4x4=0; i4x4<4; i4x4++){
                        const int index= i4x4 + 4*i8x8 + p*16;
                        if( decode_residual(h, gb, buf, index, scan8x8+16*i4x4,
                                            h->dequant8_coeff[cqm][qscale], 16) < 0 )
                            return -1;
                    }
                    nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ];
                    nnz[0] += nnz[1] + nnz[8] + nnz[9];
                    new_cbp |= !!nnz[0] << i8x8;
                }else{
                    for(i4x4=0; i4x4<4; i4x4++){
                        const int index= i4x4 + 4*i8x8 + p*16;
                        if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index,
                                            scan, h->dequant4_coeff[cqm][qscale], 16) < 0 ){
                            return -1;
                        }
                        new_cbp |= h->non_zero_count_cache[ scan8[index] ] << i8x8;
                    }
                }
            }else{
                uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ];
                nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
            }
        }
        return new_cbp;
    }
}

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int ff_h264_decode_mb_cavlc(H264Context *h){
    int mb_xy;
    int partition_count;
    unsigned int mb_type, cbp;
    int dct8x8_allowed= h->pps.transform_8x8_mode;
704
    int decode_chroma = h->sps.chroma_format_idc == 1 || h->sps.chroma_format_idc == 2;
705
    const int pixel_shift = h->pixel_shift;
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    unsigned local_ref_count[2];
707

708
    mb_xy = h->mb_xy = h->mb_x + h->mb_y*h->mb_stride;
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710
    tprintf(h->avctx, "pic:%d mb:%d/%d\n", h->frame_num, h->mb_x, h->mb_y);
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    cbp = 0; /* avoid warning. FIXME: find a solution without slowing
                down the code */
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    if(h->slice_type_nos != AV_PICTURE_TYPE_I){
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        if(h->mb_skip_run==-1)
            h->mb_skip_run= get_ue_golomb(&h->gb);
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717
        if (h->mb_skip_run--) {
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            if(FRAME_MBAFF(h) && (h->mb_y&1) == 0){
719 720
                if(h->mb_skip_run==0)
                    h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&h->gb);
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            }
            decode_mb_skip(h);
            return 0;
        }
    }
726
    if (FRAME_MBAFF(h)) {
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        if( (h->mb_y&1) == 0 )
            h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&h->gb);
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    }

    h->prev_mb_skipped= 0;

733
    mb_type= get_ue_golomb(&h->gb);
734
    if(h->slice_type_nos == AV_PICTURE_TYPE_B){
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        if(mb_type < 23){
            partition_count= b_mb_type_info[mb_type].partition_count;
            mb_type=         b_mb_type_info[mb_type].type;
        }else{
            mb_type -= 23;
            goto decode_intra_mb;
        }
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    }else if(h->slice_type_nos == AV_PICTURE_TYPE_P){
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        if(mb_type < 5){
            partition_count= p_mb_type_info[mb_type].partition_count;
            mb_type=         p_mb_type_info[mb_type].type;
        }else{
            mb_type -= 5;
            goto decode_intra_mb;
        }
    }else{
751
       av_assert2(h->slice_type_nos == AV_PICTURE_TYPE_I);
752
        if(h->slice_type == AV_PICTURE_TYPE_SI && mb_type)
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            mb_type--;
decode_intra_mb:
        if(mb_type > 25){
756
            av_log(h->avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_picture_type_char(h->slice_type), h->mb_x, h->mb_y);
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            return -1;
        }
        partition_count=0;
        cbp= i_mb_type_info[mb_type].cbp;
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
        mb_type= i_mb_type_info[mb_type].type;
    }

765
    if(MB_FIELD(h))
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        mb_type |= MB_TYPE_INTERLACED;

    h->slice_table[ mb_xy ]= h->slice_num;

    if(IS_INTRA_PCM(mb_type)){
771
        const int mb_size = ff_h264_mb_sizes[h->sps.chroma_format_idc] *
772
                            h->sps.bit_depth_luma;
773 774

        // We assume these blocks are very rare so we do not optimize it.
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        h->intra_pcm_ptr = align_get_bits(&h->gb);
        skip_bits_long(&h->gb, mb_size);
777 778

        // In deblocking, the quantizer is 0
779
        h->cur_pic.qscale_table[mb_xy] = 0;
780
        // All coeffs are present
781
        memset(h->non_zero_count[mb_xy], 16, 48);
782

783
        h->cur_pic.mb_type[mb_xy] = mb_type;
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        return 0;
    }

787 788
    local_ref_count[0] = h->ref_count[0] << MB_MBAFF(h);
    local_ref_count[1] = h->ref_count[1] << MB_MBAFF(h);
789

790
    fill_decode_neighbors(h, mb_type);
791
    fill_decode_caches(h, mb_type);
792 793 794 795 796 797 798 799

    //mb_pred
    if(IS_INTRA(mb_type)){
        int pred_mode;
//            init_top_left_availability(h);
        if(IS_INTRA4x4(mb_type)){
            int i;
            int di = 1;
800
            if(dct8x8_allowed && get_bits1(&h->gb)){
801 802 803 804 805 806 807 808
                mb_type |= MB_TYPE_8x8DCT;
                di = 4;
            }

//                fill_intra4x4_pred_table(h);
            for(i=0; i<16; i+=di){
                int mode= pred_intra_mode(h, i);

809 810
                if(!get_bits1(&h->gb)){
                    const int rem_mode= get_bits(&h->gb, 3);
811 812 813 814 815 816 817 818
                    mode = rem_mode + (rem_mode >= mode);
                }

                if(di==4)
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
                else
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
            }
819
            write_back_intra_pred_mode(h);
820 821 822
            if( ff_h264_check_intra4x4_pred_mode(h) < 0)
                return -1;
        }else{
823
            h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode, 0);
824 825 826
            if(h->intra16x16_pred_mode < 0)
                return -1;
        }
827
        if(decode_chroma){
828
            pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&h->gb), 1);
829 830 831
            if(pred_mode < 0)
                return -1;
            h->chroma_pred_mode= pred_mode;
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        } else {
            h->chroma_pred_mode = DC_128_PRED8x8;
834 835 836 837
        }
    }else if(partition_count==4){
        int i, j, sub_partition_count[4], list, ref[2][4];

838
        if(h->slice_type_nos == AV_PICTURE_TYPE_B){
839
            for(i=0; i<4; i++){
840
                h->sub_mb_type[i]= get_ue_golomb_31(&h->gb);
841
                if(h->sub_mb_type[i] >=13){
842
                    av_log(h->avctx, AV_LOG_ERROR, "B sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], h->mb_x, h->mb_y);
843 844 845 846 847
                    return -1;
                }
                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
848
            if( IS_DIRECT(h->sub_mb_type[0]|h->sub_mb_type[1]|h->sub_mb_type[2]|h->sub_mb_type[3])) {
849 850 851 852 853 854 855
                ff_h264_pred_direct_motion(h, &mb_type);
                h->ref_cache[0][scan8[4]] =
                h->ref_cache[1][scan8[4]] =
                h->ref_cache[0][scan8[12]] =
                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
            }
        }else{
856
            av_assert2(h->slice_type_nos == AV_PICTURE_TYPE_P); //FIXME SP correct ?
857
            for(i=0; i<4; i++){
858
                h->sub_mb_type[i]= get_ue_golomb_31(&h->gb);
859
                if(h->sub_mb_type[i] >=4){
860
                    av_log(h->avctx, AV_LOG_ERROR, "P sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], h->mb_x, h->mb_y);
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                    return -1;
                }
                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
        }

        for(list=0; list<h->list_count; list++){
869
            int ref_count= IS_REF0(mb_type) ? 1 : local_ref_count[list];
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            for(i=0; i<4; i++){
                if(IS_DIRECT(h->sub_mb_type[i])) continue;
                if(IS_DIR(h->sub_mb_type[i], 0, list)){
                    unsigned int tmp;
                    if(ref_count == 1){
                        tmp= 0;
                    }else if(ref_count == 2){
877
                        tmp= get_bits1(&h->gb)^1;
878
                    }else{
879
                        tmp= get_ue_golomb_31(&h->gb);
880
                        if(tmp>=ref_count){
881
                            av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912
                            return -1;
                        }
                    }
                    ref[list][i]= tmp;
                }else{
                 //FIXME
                    ref[list][i] = -1;
                }
            }
        }

        if(dct8x8_allowed)
            dct8x8_allowed = get_dct8x8_allowed(h);

        for(list=0; list<h->list_count; list++){
            for(i=0; i<4; i++){
                if(IS_DIRECT(h->sub_mb_type[i])) {
                    h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ];
                    continue;
                }
                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ]=
                h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];

                if(IS_DIR(h->sub_mb_type[i], 0, list)){
                    const int sub_mb_type= h->sub_mb_type[i];
                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
                    for(j=0; j<sub_partition_count[i]; j++){
                        int mx, my;
                        const int index= 4*i + block_width*j;
                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
913 914 915
                        mx += get_se_golomb(&h->gb);
                        my += get_se_golomb(&h->gb);
                        tprintf(h->avctx, "final mv:%d %d\n", mx, my);
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                        if(IS_SUB_8X8(sub_mb_type)){
                            mv_cache[ 1 ][0]=
                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
                            mv_cache[ 1 ][1]=
                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
                        }else if(IS_SUB_8X4(sub_mb_type)){
                            mv_cache[ 1 ][0]= mx;
                            mv_cache[ 1 ][1]= my;
                        }else if(IS_SUB_4X8(sub_mb_type)){
                            mv_cache[ 8 ][0]= mx;
                            mv_cache[ 8 ][1]= my;
                        }
                        mv_cache[ 0 ][0]= mx;
                        mv_cache[ 0 ][1]= my;
                    }
                }else{
                    uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
                    p[0] = p[1]=
                    p[8] = p[9]= 0;
                }
            }
        }
    }else if(IS_DIRECT(mb_type)){
        ff_h264_pred_direct_motion(h, &mb_type);
        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
    }else{
        int list, mx, my, i;
         //FIXME we should set ref_idx_l? to 0 if we use that later ...
        if(IS_16X16(mb_type)){
            for(list=0; list<h->list_count; list++){
                    unsigned int val;
                    if(IS_DIR(mb_type, 0, list)){
949
                        if(local_ref_count[list]==1){
950
                            val= 0;
951
                        }else if(local_ref_count[list]==2){
952
                            val= get_bits1(&h->gb)^1;
953
                        }else{
954
                            val= get_ue_golomb_31(&h->gb);
955
                            if(val >= local_ref_count[list]){
956
                                av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
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                                return -1;
                            }
                        }
                    fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1);
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                    }
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            }
            for(list=0; list<h->list_count; list++){
                if(IS_DIR(mb_type, 0, list)){
                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
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                    mx += get_se_golomb(&h->gb);
                    my += get_se_golomb(&h->gb);
                    tprintf(h->avctx, "final mv:%d %d\n", mx, my);
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                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
                }
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            }
        }
        else if(IS_16X8(mb_type)){
            for(list=0; list<h->list_count; list++){
                    for(i=0; i<2; i++){
                        unsigned int val;
                        if(IS_DIR(mb_type, i, list)){
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                            if(local_ref_count[list] == 1){
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                                val= 0;
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                            }else if(local_ref_count[list] == 2){
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                                val= get_bits1(&h->gb)^1;
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                            }else{
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                                val= get_ue_golomb_31(&h->gb);
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                                if(val >= local_ref_count[list]){
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                                    av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
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                                    return -1;
                                }
                            }
                        }else
                            val= LIST_NOT_USED&0xFF;
                        fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1);
                    }
            }
            for(list=0; list<h->list_count; list++){
                for(i=0; i<2; i++){
                    unsigned int val;
                    if(IS_DIR(mb_type, i, list)){
                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
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                        mx += get_se_golomb(&h->gb);
                        my += get_se_golomb(&h->gb);
                        tprintf(h->avctx, "final mv:%d %d\n", mx, my);
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                        val= pack16to32(mx,my);
                    }else
                        val=0;
                    fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4);
                }
            }
        }else{
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            av_assert2(IS_8X16(mb_type));
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            for(list=0; list<h->list_count; list++){
                    for(i=0; i<2; i++){
                        unsigned int val;
                        if(IS_DIR(mb_type, i, list)){ //FIXME optimize
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                            if(local_ref_count[list]==1){
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                                val= 0;
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                            }else if(local_ref_count[list]==2){
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                                val= get_bits1(&h->gb)^1;
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                            }else{
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                                val= get_ue_golomb_31(&h->gb);
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                                if(val >= local_ref_count[list]){
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                                    av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
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                                    return -1;
                                }
                            }
                        }else
                            val= LIST_NOT_USED&0xFF;
                        fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1);
                    }
            }
            for(list=0; list<h->list_count; list++){
                for(i=0; i<2; i++){
                    unsigned int val;
                    if(IS_DIR(mb_type, i, list)){
                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
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                        mx += get_se_golomb(&h->gb);
                        my += get_se_golomb(&h->gb);
                        tprintf(h->avctx, "final mv:%d %d\n", mx, my);
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053

                        val= pack16to32(mx,my);
                    }else
                        val=0;
                    fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4);
                }
            }
        }
    }

    if(IS_INTER(mb_type))
        write_back_motion(h, mb_type);

    if(!IS_INTRA16x16(mb_type)){
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        cbp= get_ue_golomb(&h->gb);
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        if(decode_chroma){
            if(cbp > 47){
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                av_log(h->avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, h->mb_x, h->mb_y);
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                return -1;
            }
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            if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp];
            else                     cbp= golomb_to_inter_cbp   [cbp];
        }else{
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            if(cbp > 15){
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                av_log(h->avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, h->mb_x, h->mb_y);
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                return -1;
            }
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            if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp];
            else                     cbp= golomb_to_inter_cbp_gray[cbp];
        }
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    } else {
        if (!decode_chroma && cbp>15) {
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            av_log(h->avctx, AV_LOG_ERROR, "gray chroma\n");
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            return AVERROR_INVALIDDATA;
        }
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    }

    if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){
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        mb_type |= MB_TYPE_8x8DCT*get_bits1(&h->gb);
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    }
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    h->cbp=
    h->cbp_table[mb_xy]= cbp;
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    h->cur_pic.mb_type[mb_xy] = mb_type;
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    if(cbp || IS_INTRA16x16(mb_type)){
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        int i4x4, i8x8, chroma_idx;
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        int dquant;
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        int ret;
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        GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr;
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        const uint8_t *scan, *scan8x8;
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        const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
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        if(IS_INTERLACED(mb_type)){
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            scan8x8= h->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0;
            scan= h->qscale ? h->field_scan : h->field_scan_q0;
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        }else{
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            scan8x8= h->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0;
            scan= h->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
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        }

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        dquant= get_se_golomb(&h->gb);
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1103
        h->qscale += dquant;
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        if(((unsigned)h->qscale) > max_qp){
            if(h->qscale<0) h->qscale+= max_qp+1;
            else            h->qscale-= max_qp+1;
            if(((unsigned)h->qscale) > max_qp){
                av_log(h->avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, h->mb_x, h->mb_y);
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                return -1;
            }
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        }

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        h->chroma_qp[0]= get_chroma_qp(h, 0, h->qscale);
        h->chroma_qp[1]= get_chroma_qp(h, 1, h->qscale);
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        if( (ret = decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 0)) < 0 ){
            return -1;
        }
        h->cbp_table[mb_xy] |= ret << 12;
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        if (CHROMA444(h)) {
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            if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 1) < 0 ){
                return -1;
            }
            if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 2) < 0 ){
                return -1;
            }
        } else {
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            const int num_c8x8 = h->sps.chroma_format_idc;

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            if(cbp&0x30){
                for(chroma_idx=0; chroma_idx<2; chroma_idx++)
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                    if (decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift),
                                        CHROMA_DC_BLOCK_INDEX+chroma_idx,
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                                        CHROMA422(h) ? chroma422_dc_scan : chroma_dc_scan,
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                                        NULL, 4*num_c8x8) < 0) {
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                        return -1;
                    }
            }
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            if(cbp&0x20){
                for(chroma_idx=0; chroma_idx<2; chroma_idx++){
                    const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
Diego Biurrun's avatar
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1144
                    int16_t *mb = h->mb + (16*(16 + 16*chroma_idx) << pixel_shift);
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                    for (i8x8=0; i8x8<num_c8x8; i8x8++) {
                        for (i4x4=0; i4x4<4; i4x4++) {
                            const int index= 16 + 16*chroma_idx + 8*i8x8 + i4x4;
                            if (decode_residual(h, gb, mb, index, scan + 1, qmul, 15) < 0)
                                return -1;
                            mb += 16<<pixel_shift;
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                        }
                    }
                }
            }else{
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                fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
                fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
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            }
        }
    }else{
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        fill_rectangle(&h->non_zero_count_cache[scan8[ 0]], 4, 4, 8, 0, 1);
        fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
        fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
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    }
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    h->cur_pic.qscale_table[mb_xy] = h->qscale;
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    write_back_non_zero_count(h);

    return 0;
}