diff options
Diffstat (limited to 'libavcodec/h264_cavlc.c')
| -rw-r--r-- | libavcodec/h264_cavlc.c | 1053 |
1 files changed, 1053 insertions, 0 deletions
diff --git a/libavcodec/h264_cavlc.c b/libavcodec/h264_cavlc.c new file mode 100644 index 0000000000..8cf188dd06 --- /dev/null +++ b/libavcodec/h264_cavlc.c @@ -0,0 +1,1053 @@ +/* + * 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 + */ + +/** + * @file libavcodec/h264_cavlc.c + * H.264 / AVC / MPEG4 part10 cavlc bitstream decoding. + * @author Michael Niedermayer <michaelni@gmx.at> + */ + +#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" + +#if ARCH_X86 +#include "x86/h264_i386.h" +#endif + +//#undef NDEBUG +#include <assert.h> + +static const uint8_t golomb_to_intra4x4_cbp[48]={ + 47, 31, 15, 0, 23, 27, 29, 30, 7, 11, 13, 14, 39, 43, 45, 46, + 16, 3, 5, 10, 12, 19, 21, 26, 28, 35, 37, 42, 44, 1, 2, 4, + 8, 17, 18, 20, 24, 6, 9, 22, 25, 32, 33, 34, 36, 40, 38, 41 +}; + +static const uint8_t golomb_to_inter_cbp[48]={ + 0, 16, 1, 2, 4, 8, 32, 3, 5, 10, 12, 15, 47, 7, 11, 13, + 14, 6, 9, 31, 35, 37, 42, 44, 33, 34, 36, 40, 39, 43, 45, 46, + 17, 18, 20, 24, 19, 21, 26, 28, 23, 27, 29, 30, 22, 25, 38, 41 +}; + +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, +}; + +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,}, +}; + +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; + +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; + +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]; + + +/** + * gets the predicted number of non-zero coefficients. + * @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; + + tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31); + + return i&31; +} + +static av_cold void init_cavlc_level_tab(void){ + int suffix_length, mask; + 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); + int level_code= (prefix<<suffix_length) + (i>>(LEVEL_TAB_BITS-prefix-1-suffix_length)) - (1<<suffix_length); + + mask= -(level_code&1); + level_code= (((2+level_code)>>1) ^ mask) - mask; + if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){ + 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); + + 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); + } + 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; +} + +/** + * decodes a residual block. + * @param n block index + * @param scantable scantable + * @param max_coeff number of coefficients in the block + * @return <0 if an error occurred + */ +static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){ + MpegEncContext * const s = &h->s; + 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]; + int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before; + + //FIXME put trailing_onex into the context + + if(n == CHROMA_DC_BLOCK_INDEX){ + coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1); + total_coeff= coeff_token>>2; + }else{ + if(n == LUMA_DC_BLOCK_INDEX){ + total_coeff= pred_non_zero_count(h, 0); + 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; + h->non_zero_count_cache[ scan8[n] ]= total_coeff; + } + } + + //FIXME set last_non_zero? + + if(total_coeff==0) + return 0; + if(total_coeff > (unsigned)max_coeff) { + av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff); + return -1; + } + + trailing_ones= coeff_token&3; + tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff); + 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; + int suffix_length = total_coeff > 10 && trailing_ones < 3; + 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 + if(prefix>=16) + level_code += (1<<(prefix-3))-4096; + } + + if(trailing_ones < 3) level_code += 2; + + suffix_length = 2; + mask= -(level_code&1); + level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask; + }else{ + if(trailing_ones < 3) level_code += (level_code>>31)|1; + + suffix_length = 1; + if(level_code + 3U > 6U) + suffix_length++; + 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; + + if(suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length]) + suffix_length++; + } + } + + if(total_coeff == max_coeff) + zeros_left=0; + else{ + if(n == CHROMA_DC_BLOCK_INDEX) + zeros_left= get_vlc2(gb, chroma_dc_total_zeros_vlc[ total_coeff-1 ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1); + else + zeros_left= get_vlc2(gb, total_zeros_vlc[ total_coeff-1 ].table, TOTAL_ZEROS_VLC_BITS, 1); + } + + coeff_num = zeros_left + total_coeff - 1; + j = scantable[coeff_num]; + if(n > 24){ + block[j] = level[0]; + for(i=1;i<total_coeff;i++) { + if(zeros_left <= 0) + run_before = 0; + else if(zeros_left < 7){ + run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1); + }else{ + run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); + } + zeros_left -= run_before; + coeff_num -= 1 + run_before; + j= scantable[ coeff_num ]; + + block[j]= level[i]; + } + }else{ + block[j] = (level[0] * qmul[j] + 32)>>6; + for(i=1;i<total_coeff;i++) { + if(zeros_left <= 0) + run_before = 0; + else if(zeros_left < 7){ + run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1); + }else{ + run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); + } + zeros_left -= run_before; + coeff_num -= 1 + run_before; + j= scantable[ coeff_num ]; + + block[j]= (level[i] * qmul[j] + 32)>>6; + } + } + + if(zeros_left<0){ + av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + return 0; +} + +int ff_h264_decode_mb_cavlc(H264Context *h){ + MpegEncContext * const s = &h->s; + int mb_xy; + int partition_count; + unsigned int mb_type, cbp; + int dct8x8_allowed= h->pps.transform_8x8_mode; + + mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride; + + tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y); + cbp = 0; /* avoid warning. FIXME: find a solution without slowing + down the code */ + if(h->slice_type_nos != FF_I_TYPE){ + if(s->mb_skip_run==-1) + s->mb_skip_run= get_ue_golomb(&s->gb); + + if (s->mb_skip_run--) { + if(FRAME_MBAFF && (s->mb_y&1) == 0){ + if(s->mb_skip_run==0) + h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb); + else + predict_field_decoding_flag(h); + } + decode_mb_skip(h); + return 0; + } + } + if(FRAME_MBAFF){ + if( (s->mb_y&1) == 0 ) + h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb); + } + + h->prev_mb_skipped= 0; + + mb_type= get_ue_golomb(&s->gb); + if(h->slice_type_nos == FF_B_TYPE){ + 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; + } + }else if(h->slice_type_nos == FF_P_TYPE){ + 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{ + assert(h->slice_type_nos == FF_I_TYPE); + if(h->slice_type == FF_SI_TYPE && mb_type) + mb_type--; +decode_intra_mb: + if(mb_type > 25){ + av_log(h->s.avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_pict_type_char(h->slice_type), s->mb_x, s->mb_y); + 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; + } + + if(MB_FIELD) + mb_type |= MB_TYPE_INTERLACED; + + h->slice_table[ mb_xy ]= h->slice_num; + + if(IS_INTRA_PCM(mb_type)){ + unsigned int x; + + // We assume these blocks are very rare so we do not optimize it. + align_get_bits(&s->gb); + + // The pixels are stored in the same order as levels in h->mb array. + for(x=0; x < (CHROMA ? 384 : 256); x++){ + ((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8); + } + + // In deblocking, the quantizer is 0 + s->current_picture.qscale_table[mb_xy]= 0; + // All coeffs are present + memset(h->non_zero_count[mb_xy], 16, 16); + + s->current_picture.mb_type[mb_xy]= mb_type; + return 0; + } + + if(MB_MBAFF){ + h->ref_count[0] <<= 1; + h->ref_count[1] <<= 1; + } + + fill_caches(h, mb_type, 0); + + //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; + if(dct8x8_allowed && get_bits1(&s->gb)){ + 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); + + if(!get_bits1(&s->gb)){ + const int rem_mode= get_bits(&s->gb, 3); + 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; + } + ff_h264_write_back_intra_pred_mode(h); + if( ff_h264_check_intra4x4_pred_mode(h) < 0) + return -1; + }else{ + h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode); + if(h->intra16x16_pred_mode < 0) + return -1; + } + if(CHROMA){ + pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&s->gb)); + if(pred_mode < 0) + return -1; + h->chroma_pred_mode= pred_mode; + } + }else if(partition_count==4){ + int i, j, sub_partition_count[4], list, ref[2][4]; + + if(h->slice_type_nos == FF_B_TYPE){ + for(i=0; i<4; i++){ + h->sub_mb_type[i]= get_ue_golomb_31(&s->gb); + if(h->sub_mb_type[i] >=13){ + av_log(h->s.avctx, AV_LOG_ERROR, "B sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y); + 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; + } + if( IS_DIRECT(h->sub_mb_type[0]) || IS_DIRECT(h->sub_mb_type[1]) + || IS_DIRECT(h->sub_mb_type[2]) || IS_DIRECT(h->sub_mb_type[3])) { + 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{ + assert(h->slice_type_nos == FF_P_TYPE); //FIXME SP correct ? + for(i=0; i<4; i++){ + h->sub_mb_type[i]= get_ue_golomb_31(&s->gb); + if(h->sub_mb_type[i] >=4){ + av_log(h->s.avctx, AV_LOG_ERROR, "P sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y); + 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++){ + int ref_count= IS_REF0(mb_type) ? 1 : h->ref_count[list]; + 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){ + tmp= get_bits1(&s->gb)^1; + }else{ + tmp= get_ue_golomb_31(&s->gb); + if(tmp>=ref_count){ + av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp); + 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); + mx += get_se_golomb(&s->gb); + my += get_se_golomb(&s->gb); + tprintf(s->avctx, "final mv:%d %d\n", mx, my); + + 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)){ + if(h->ref_count[list]==1){ + val= 0; + }else if(h->ref_count[list]==2){ + val= get_bits1(&s->gb)^1; + }else{ + val= get_ue_golomb_31(&s->gb); + if(val >= h->ref_count[list]){ + av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val); + return -1; + } + } + }else + val= LIST_NOT_USED&0xFF; + fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1); + } + for(list=0; list<h->list_count; list++){ + unsigned int val; + if(IS_DIR(mb_type, 0, list)){ + pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my); + mx += get_se_golomb(&s->gb); + my += get_se_golomb(&s->gb); + tprintf(s->avctx, "final mv:%d %d\n", mx, my); + + val= pack16to32(mx,my); + }else + val=0; + fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, val, 4); + } + } + 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)){ + if(h->ref_count[list] == 1){ + val= 0; + }else if(h->ref_count[list] == 2){ + val= get_bits1(&s->gb)^1; + }else{ + val= get_ue_golomb_31(&s->gb); + if(val >= h->ref_count[list]){ + av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val); + 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); + mx += get_se_golomb(&s->gb); + my += get_se_golomb(&s->gb); + tprintf(s->avctx, "final mv:%d %d\n", mx, my); + + 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 + if(h->ref_count[list]==1){ + val= 0; + }else if(h->ref_count[list]==2){ + val= get_bits1(&s->gb)^1; + }else{ + val= get_ue_golomb_31(&s->gb); + if(val >= h->ref_count[list]){ + av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val); + 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); + mx += get_se_golomb(&s->gb); + my += get_se_golomb(&s->gb); + tprintf(s->avctx, "final mv:%d %d\n", mx, my); + + 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)){ + cbp= get_ue_golomb(&s->gb); + if(cbp > 47){ + av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y); + return -1; + } + + if(CHROMA){ + if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp]; + else cbp= golomb_to_inter_cbp [cbp]; + }else{ + if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp]; + else cbp= golomb_to_inter_cbp_gray[cbp]; + } + } + h->cbp = cbp; + + if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){ + if(get_bits1(&s->gb)){ + mb_type |= MB_TYPE_8x8DCT; + h->cbp_table[mb_xy]= cbp; + } + } + s->current_picture.mb_type[mb_xy]= mb_type; + + if(cbp || IS_INTRA16x16(mb_type)){ + int i8x8, i4x4, chroma_idx; + int dquant; + GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr; + const uint8_t *scan, *scan8x8, *dc_scan; + +// fill_non_zero_count_cache(h); + + if(IS_INTERLACED(mb_type)){ + scan8x8= s->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0; + scan= s->qscale ? h->field_scan : h->field_scan_q0; + dc_scan= luma_dc_field_scan; + }else{ + scan8x8= s->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0; + scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0; + dc_scan= luma_dc_zigzag_scan; + } + + dquant= get_se_golomb(&s->gb); + + if( dquant > 25 || dquant < -26 ){ + av_log(h->s.avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, s->mb_x, s->mb_y); + return -1; + } + + s->qscale += dquant; + if(((unsigned)s->qscale) > 51){ + if(s->qscale<0) s->qscale+= 52; + else s->qscale-= 52; + } + + h->chroma_qp[0]= get_chroma_qp(h, 0, s->qscale); + h->chroma_qp[1]= get_chroma_qp(h, 1, s->qscale); + if(IS_INTRA16x16(mb_type)){ + if( decode_residual(h, h->intra_gb_ptr, h->mb, LUMA_DC_BLOCK_INDEX, dc_scan, h->dequant4_coeff[0][s->qscale], 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; + if( decode_residual(h, h->intra_gb_ptr, h->mb + 16*index, index, scan + 1, h->dequant4_coeff[0][s->qscale], 15) < 0 ){ + return -1; + } + } + } + }else{ + fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1); + } + }else{ + for(i8x8=0; i8x8<4; i8x8++){ + if(cbp & (1<<i8x8)){ + if(IS_8x8DCT(mb_type)){ + DCTELEM *buf = &h->mb[64*i8x8]; + uint8_t *nnz; + for(i4x4=0; i4x4<4; i4x4++){ + if( decode_residual(h, gb, buf, i4x4+4*i8x8, scan8x8+16*i4x4, + h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 16) <0 ) + return -1; + } + nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ]; + nnz[0] += nnz[1] + nnz[8] + nnz[9]; + }else{ + for(i4x4=0; i4x4<4; i4x4++){ + const int index= i4x4 + 4*i8x8; + + if( decode_residual(h, gb, h->mb + 16*index, index, scan, h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale], 16) <0 ){ + return -1; + } + } + } + }else{ + uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ]; + nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0; + } + } + } + + if(cbp&0x30){ + for(chroma_idx=0; chroma_idx<2; chroma_idx++) + if( decode_residual(h, gb, h->mb + 256 + 16*4*chroma_idx, CHROMA_DC_BLOCK_INDEX, chroma_dc_scan, NULL, 4) < 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]]; + for(i4x4=0; i4x4<4; i4x4++){ + const int index= 16 + 4*chroma_idx + i4x4; + if( decode_residual(h, gb, h->mb + 16*index, index, scan + 1, qmul, 15) < 0){ + return -1; + } + } + } + }else{ + uint8_t * const nnz= &h->non_zero_count_cache[0]; + nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] = + nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0; + } + }else{ + uint8_t * const nnz= &h->non_zero_count_cache[0]; + fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1); + nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] = + nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0; + } + s->current_picture.qscale_table[mb_xy]= s->qscale; + write_back_non_zero_count(h); + + if(MB_MBAFF){ + h->ref_count[0] >>= 1; + h->ref_count[1] >>= 1; + } + + return 0; +} + |