h264_cavlc.c 43.4 KB
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/*
 * H.26L/H.264/AVC/JVT/14496-10/... cavlc bitstream decoding
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * 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.
 *
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 * Libav is distributed in the hope that it will be useful,
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 * 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
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 * License along with Libav; if not, write to the Free Software
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 * 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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#include "internal.h"
#include "avcodec.h"
#include "h264.h"
#include "h264data.h" // FIXME FIXME FIXME
#include "h264_mvpred.h"
#include "golomb.h"
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#include "mpegutils.h"
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#include <assert.h>

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.
         */
        assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));

        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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    assert(total_coeff<=16);

    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{
                level_code= 30 + get_bits(gb, prefix-3); //part
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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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            }

            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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            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{
                    level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
                    if(prefix>=16)
                        level_code += (1<<(prefix-3))-4096;
                }
                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)
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                zeros_left = get_vlc2(gb, chroma_dc_total_zeros_vlc[total_coeff - 1].table,
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                                      CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
            else
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                zeros_left = get_vlc2(gb, chroma422_dc_total_zeros_vlc[total_coeff - 1].table,
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                                      CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 1);
        } else {
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            zeros_left= get_vlc2(gb, total_zeros_vlc[total_coeff - 1].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) \
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                run_before= get_vlc2(gb, run_vlc[zeros_left - 1].table, RUN_VLC_BITS, 1); \
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            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) \
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                run_before= get_vlc2(gb, run_vlc[zeros_left - 1].table, RUN_VLC_BITS, 1); \
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            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 (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 AVERROR_INVALIDDATA;
    }

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

    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
        }

        assert((cbp&15) == 0 || (cbp&15) == 15);

        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
662
                    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;
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    int decode_chroma = h->sps.chroma_format_idc == 1 || h->sps.chroma_format_idc == 2;
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    const int pixel_shift = h->pixel_shift;
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700
    mb_xy = h->mb_xy = h->mb_x + h->mb_y*h->mb_stride;
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702
    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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709
        if (h->mb_skip_run--) {
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            if(FRAME_MBAFF(h) && (h->mb_y&1) == 0){
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                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;
        }
    }
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    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;

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    mb_type= get_ue_golomb(&h->gb);
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    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{
743 744
       assert(h->slice_type_nos == AV_PICTURE_TYPE_I);
        if(h->slice_type == AV_PICTURE_TYPE_SI && mb_type)
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            mb_type--;
decode_intra_mb:
        if(mb_type > 25){
748
            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);
749 750 751 752 753 754 755 756
            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;
    }

757
    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)){
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        const int mb_size = ff_h264_mb_sizes[h->sps.chroma_format_idc] *
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                            h->sps.bit_depth_luma;
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        // 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);
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        if (get_bits_left(&h->gb) < mb_size) {
            av_log(h->avctx, AV_LOG_ERROR, "Not enough data for an intra PCM block.\n");
            return AVERROR_INVALIDDATA;
        }
772
        skip_bits_long(&h->gb, mb_size);
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        // In deblocking, the quantizer is 0
775
        h->cur_pic.qscale_table[mb_xy] = 0;
776
        // All coeffs are present
777
        memset(h->non_zero_count[mb_xy], 16, 48);
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779
        h->cur_pic.mb_type[mb_xy] = mb_type;
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        return 0;
    }

783
    fill_decode_neighbors(h, mb_type);
784
    fill_decode_caches(h, mb_type);
785 786 787 788 789 790 791 792

    //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;
793
            if(dct8x8_allowed && get_bits1(&h->gb)){
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                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);

802 803
                if(!get_bits1(&h->gb)){
                    const int rem_mode= get_bits(&h->gb, 3);
804 805 806 807 808 809 810 811
                    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;
            }
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            write_back_intra_pred_mode(h);
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            if( ff_h264_check_intra4x4_pred_mode(h) < 0)
                return -1;
        }else{
816
            h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode, 0);
817 818 819
            if(h->intra16x16_pred_mode < 0)
                return -1;
        }
820
        if(decode_chroma){
821
            pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&h->gb), 1);
822 823 824
            if(pred_mode < 0)
                return -1;
            h->chroma_pred_mode= pred_mode;
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        } else {
            h->chroma_pred_mode = DC_128_PRED8x8;
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        }
    }else if(partition_count==4){
        int i, j, sub_partition_count[4], list, ref[2][4];

831
        if(h->slice_type_nos == AV_PICTURE_TYPE_B){
832
            for(i=0; i<4; i++){
833
                h->sub_mb_type[i]= get_ue_golomb_31(&h->gb);
834
                if(h->sub_mb_type[i] >=13){
835
                    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);
836 837 838 839 840
                    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;
            }
841
            if( IS_DIRECT(h->sub_mb_type[0]|h->sub_mb_type[1]|h->sub_mb_type[2]|h->sub_mb_type[3])) {
842 843 844 845 846 847 848
                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{
849
            assert(h->slice_type_nos == AV_PICTURE_TYPE_P); //FIXME SP correct ?
850
            for(i=0; i<4; i++){
851
                h->sub_mb_type[i]= get_ue_golomb_31(&h->gb);
852
                if(h->sub_mb_type[i] >=4){
853
                    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);
854 855 856 857 858 859 860 861
                    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++){
862
            int ref_count = IS_REF0(mb_type) ? 1 : h->ref_count[list] << MB_MBAFF(h);
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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){
870
                        tmp= get_bits1(&h->gb)^1;
871
                    }else{
872
                        tmp= get_ue_golomb_31(&h->gb);
873
                        if(tmp>=ref_count){
874
                            av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905
                            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);
906 907 908
                        mx += get_se_golomb(&h->gb);
                        my += get_se_golomb(&h->gb);
                        tprintf(h->avctx, "final mv:%d %d\n", mx, my);
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941

                        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)){
942
                        int rc = h->ref_count[list] << MB_MBAFF(h);
943
                        if (rc == 1) {
944
                            val= 0;
945
                        } else if (rc == 2) {
946
                            val= get_bits1(&h->gb)^1;
947
                        }else{
948
                            val= get_ue_golomb_31(&h->gb);
949
                            if (val >= rc) {
950
                                av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
951 952 953 954
                                return -1;
                            }
                        }
                    fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1);
955
                    }
956 957 958 959
            }
            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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                            int rc = h->ref_count[list] << MB_MBAFF(h);
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                            if (rc == 1) {
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                                val= 0;
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                            } else if (rc == 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 >= rc) {
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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{
            assert(IS_8X16(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)){ //FIXME optimize
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                            int rc = h->ref_count[list] << MB_MBAFF(h);
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                            if (rc == 1) {
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                                val= 0;
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                            } else if (rc == 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 >= rc) {
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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);
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                        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];
        }
    }

    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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        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;
            }
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        } else if (CHROMA422(h)) {
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            if(cbp&0x30){
                for(chroma_idx=0; chroma_idx<2; chroma_idx++)
                    if (decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift),
                                        CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma422_dc_scan,
                                        NULL, 8) < 0) {
                        return -1;
                    }
            }

            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]];
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1132
                    int16_t *mb = h->mb + (16*(16 + 16*chroma_idx) << pixel_shift);
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                    for (i8x8 = 0; i8x8 < 2; 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;
                        }
                    }
                }
            }else{
                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);
            }
        } else /* yuv420 */ {
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            if(cbp&0x30){
                for(chroma_idx=0; chroma_idx<2; chroma_idx++)
                    if( decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift), CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma_dc_scan, NULL, 4) < 0){
                        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]];
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                    for(i4x4=0; i4x4<4; i4x4++){
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                        const int index= 16 + 16*chroma_idx + i4x4;
                        if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index, scan + 1, qmul, 15) < 0){
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                            return -1;
                        }
                    }
                }
            }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;
}