cavlc.c
资源名称:X264CODEC.rar [点击查看]
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上传日期:2022-06-04
资源大小:8887k
文件大小:24k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*****************************************************************************
- * cavlc.c: h264 encoder library
- *****************************************************************************
- * Copyright (C) 2003-2008 x264 project
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Loren Merritt <lorenm@u.washington.edu>
- * Jason Garrett-Glaser <darkshikari@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
- *****************************************************************************/
- #include "common/common.h"
- #include "macroblock.h"
- #ifndef RDO_SKIP_BS
- #define RDO_SKIP_BS 0
- #endif
- static const uint8_t intra4x4_cbp_to_golomb[48]=
- {
- 3, 29, 30, 17, 31, 18, 37, 8, 32, 38, 19, 9, 20, 10, 11, 2,
- 16, 33, 34, 21, 35, 22, 39, 4, 36, 40, 23, 5, 24, 6, 7, 1,
- 41, 42, 43, 25, 44, 26, 46, 12, 45, 47, 27, 13, 28, 14, 15, 0
- };
- static const uint8_t inter_cbp_to_golomb[48]=
- {
- 0, 2, 3, 7, 4, 8, 17, 13, 5, 18, 9, 14, 10, 15, 16, 11,
- 1, 32, 33, 36, 34, 37, 44, 40, 35, 45, 38, 41, 39, 42, 43, 19,
- 6, 24, 25, 20, 26, 21, 46, 28, 27, 47, 22, 29, 23, 30, 31, 12
- };
- static const uint8_t mb_type_b_to_golomb[3][9]=
- {
- { 4, 8, 12, 10, 6, 14, 16, 18, 20 }, /* D_16x8 */
- { 5, 9, 13, 11, 7, 15, 17, 19, 21 }, /* D_8x16 */
- { 1, -1, -1, -1, 2, -1, -1, -1, 3 } /* D_16x16 */
- };
- static const uint8_t sub_mb_type_p_to_golomb[4]=
- {
- 3, 1, 2, 0
- };
- static const uint8_t sub_mb_type_b_to_golomb[13]=
- {
- 10, 4, 5, 1, 11, 6, 7, 2, 12, 8, 9, 3, 0
- };
- #define bs_write_vlc(s,v) bs_write( s, (v).i_size, (v).i_bits )
- /****************************************************************************
- * block_residual_write_cavlc:
- ****************************************************************************/
- static inline int block_residual_write_cavlc_escape( x264_t *h, bs_t *s, int i_suffix_length, int level )
- {
- static const uint16_t next_suffix[7] = { 0, 3, 6, 12, 24, 48, 0xffff };
- int i_level_prefix = 15;
- int mask = level >> 15;
- int abs_level = (level^mask)-mask;
- int i_level_code = abs_level*2-mask-2;
- if( ( i_level_code >> i_suffix_length ) < 15 )
- {
- bs_write( s, (i_level_code >> i_suffix_length) + 1 + i_suffix_length,
- (1<<i_suffix_length) + (i_level_code & ((1<<i_suffix_length)-1)) );
- }
- else
- {
- i_level_code -= 15 << i_suffix_length;
- if( i_suffix_length == 0 )
- i_level_code -= 15;
- /* If the prefix size exceeds 15, High Profile is required. */
- if( i_level_code >= 1<<12 )
- {
- if( h->sps->i_profile_idc >= PROFILE_HIGH )
- {
- while( i_level_code > 1<<(i_level_prefix-3) )
- {
- i_level_code -= 1<<(i_level_prefix-3);
- i_level_prefix++;
- }
- }
- else
- {
- #if RDO_SKIP_BS
- /* Weight highly against overflows. */
- s->i_bits_encoded += 1000000;
- #else
- x264_log(h, X264_LOG_WARNING, "OVERFLOW levelcode=%d is only allowed in High Profilen", i_level_code );
- /* clip level, preserving sign */
- i_level_code = (1<<12) - 2 + (i_level_code & 1);
- #endif
- }
- }
- bs_write( s, i_level_prefix + 1, 1 );
- bs_write( s, i_level_prefix - 3, i_level_code & ((1<<(i_level_prefix-3))-1) );
- }
- if( i_suffix_length == 0 )
- i_suffix_length++;
- if( abs_level > next_suffix[i_suffix_length] )
- i_suffix_length++;
- return i_suffix_length;
- }
- static int block_residual_write_cavlc( x264_t *h, bs_t *s, int i_ctxBlockCat, int16_t *l, int nC )
- {
- static const uint8_t ctz_index[8] = {3,0,1,0,2,0,1,0};
- static const int count_cat[5] = {16, 15, 16, 4, 15};
- x264_run_level_t runlevel;
- int i_trailing, i_total_zero, i_suffix_length, i;
- int i_total = 0;
- unsigned int i_sign;
- /* level and run and total */
- /* set these to 2 to allow branchless i_trailing calculation */
- runlevel.level[1] = 2;
- runlevel.level[2] = 2;
- i_total = h->quantf.coeff_level_run[i_ctxBlockCat]( l, &runlevel );
- i_total_zero = runlevel.last + 1 - i_total;
- i_trailing = ((((runlevel.level[0]+1) | (1-runlevel.level[0])) >> 31) & 1) // abs(runlevel.level[0])>1
- | ((((runlevel.level[1]+1) | (1-runlevel.level[1])) >> 31) & 2)
- | ((((runlevel.level[2]+1) | (1-runlevel.level[2])) >> 31) & 4);
- i_trailing = ctz_index[i_trailing];
- i_sign = ((runlevel.level[2] >> 31) & 1)
- | ((runlevel.level[1] >> 31) & 2)
- | ((runlevel.level[0] >> 31) & 4);
- i_sign >>= 3-i_trailing;
- /* total/trailing */
- bs_write_vlc( s, x264_coeff_token[nC][i_total*4+i_trailing-4] );
- i_suffix_length = i_total > 10 && i_trailing < 3;
- bs_write( s, i_trailing, i_sign );
- if( i_trailing < i_total )
- {
- int16_t val = runlevel.level[i_trailing];
- int16_t val_original = runlevel.level[i_trailing]+LEVEL_TABLE_SIZE/2;
- if( i_trailing < 3 )
- val -= (val>>15)|1; /* as runlevel.level[i] can't be 1 for the first one if i_trailing < 3 */
- val += LEVEL_TABLE_SIZE/2;
- if( (unsigned)val_original < LEVEL_TABLE_SIZE )
- {
- bs_write_vlc( s, x264_level_token[i_suffix_length][val] );
- i_suffix_length = x264_level_token[i_suffix_length][val_original].i_next;
- }
- else
- i_suffix_length = block_residual_write_cavlc_escape( h, s, i_suffix_length, val-LEVEL_TABLE_SIZE/2 );
- for( i = i_trailing+1; i < i_total; i++ )
- {
- val = runlevel.level[i] + LEVEL_TABLE_SIZE/2;
- if( (unsigned)val < LEVEL_TABLE_SIZE )
- {
- bs_write_vlc( s, x264_level_token[i_suffix_length][val] );
- i_suffix_length = x264_level_token[i_suffix_length][val].i_next;
- }
- else
- i_suffix_length = block_residual_write_cavlc_escape( h, s, i_suffix_length, val-LEVEL_TABLE_SIZE/2 );
- }
- }
- if( i_total < count_cat[i_ctxBlockCat] )
- {
- if( i_ctxBlockCat == DCT_CHROMA_DC )
- bs_write_vlc( s, x264_total_zeros_dc[i_total-1][i_total_zero] );
- else
- bs_write_vlc( s, x264_total_zeros[i_total-1][i_total_zero] );
- }
- for( i = 0; i < i_total-1 && i_total_zero > 0; i++ )
- {
- int i_zl = X264_MIN( i_total_zero, 7 );
- bs_write_vlc( s, x264_run_before[i_zl-1][runlevel.run[i]] );
- i_total_zero -= runlevel.run[i];
- }
- return i_total;
- }
- static const uint8_t ct_index[17] = {0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,3};
- #define block_residual_write_cavlc(h,s,cat,idx,l)
- {
- int nC = cat == DCT_CHROMA_DC ? 4 : ct_index[x264_mb_predict_non_zero_code( h, cat == DCT_LUMA_DC ? 0 : idx )];
- uint8_t *nnz = &h->mb.cache.non_zero_count[x264_scan8[idx]];
- if( !*nnz )
- bs_write_vlc( s, x264_coeff0_token[nC] );
- else
- *nnz = block_residual_write_cavlc(h,s,cat,l,nC);
- }
- static void cavlc_qp_delta( x264_t *h, bs_t *s )
- {
- int i_dqp = h->mb.i_qp - h->mb.i_last_qp;
- /* Avoid writing a delta quant if we have an empty i16x16 block, e.g. in a completely flat background area */
- if( h->mb.i_type == I_16x16 && !(h->mb.i_cbp_luma | h->mb.i_cbp_chroma)
- && !h->mb.cache.non_zero_count[x264_scan8[24]] )
- {
- #if !RDO_SKIP_BS
- h->mb.i_qp = h->mb.i_last_qp;
- #endif
- i_dqp = 0;
- }
- if( i_dqp )
- {
- if( i_dqp < -26 )
- i_dqp += 52;
- else if( i_dqp > 25 )
- i_dqp -= 52;
- }
- bs_write_se( s, i_dqp );
- }
- static void cavlc_mb_mvd( x264_t *h, bs_t *s, int i_list, int idx, int width )
- {
- ALIGNED_4( int16_t mvp[2] );
- x264_mb_predict_mv( h, i_list, idx, width, mvp );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[idx]][0] - mvp[0] );
- bs_write_se( s, h->mb.cache.mv[i_list][x264_scan8[idx]][1] - mvp[1] );
- }
- static inline void cavlc_mb8x8_mvd( x264_t *h, bs_t *s, int i )
- {
- switch( h->mb.i_sub_partition[i] )
- {
- case D_L0_8x8:
- cavlc_mb_mvd( h, s, 0, 4*i, 2 );
- break;
- case D_L0_8x4:
- cavlc_mb_mvd( h, s, 0, 4*i+0, 2 );
- cavlc_mb_mvd( h, s, 0, 4*i+2, 2 );
- break;
- case D_L0_4x8:
- cavlc_mb_mvd( h, s, 0, 4*i+0, 1 );
- cavlc_mb_mvd( h, s, 0, 4*i+1, 1 );
- break;
- case D_L0_4x4:
- cavlc_mb_mvd( h, s, 0, 4*i+0, 1 );
- cavlc_mb_mvd( h, s, 0, 4*i+1, 1 );
- cavlc_mb_mvd( h, s, 0, 4*i+2, 1 );
- cavlc_mb_mvd( h, s, 0, 4*i+3, 1 );
- break;
- }
- }
- static inline void x264_macroblock_luma_write_cavlc( x264_t *h, bs_t *s, int i8start, int i8end )
- {
- int i8, i4;
- if( h->mb.b_transform_8x8 )
- {
- /* shuffle 8x8 dct coeffs into 4x4 lists */
- for( i8 = i8start; i8 <= i8end; i8++ )
- if( h->mb.i_cbp_luma & (1 << i8) )
- h->zigzagf.interleave_8x8_cavlc( h->dct.luma4x4[i8*4], h->dct.luma8x8[i8], &h->mb.cache.non_zero_count[x264_scan8[i8*4]] );
- }
- for( i8 = i8start; i8 <= i8end; i8++ )
- if( h->mb.i_cbp_luma & (1 << i8) )
- for( i4 = 0; i4 < 4; i4++ )
- block_residual_write_cavlc( h, s, DCT_LUMA_4x4, i4+i8*4, h->dct.luma4x4[i4+i8*4] );
- }
- /*****************************************************************************
- * x264_macroblock_write:
- *****************************************************************************/
- void x264_macroblock_write_cavlc( x264_t *h, bs_t *s )
- {
- const int i_mb_type = h->mb.i_type;
- static const int i_offsets[3] = {5,23,0};
- int i_mb_i_offset = i_offsets[h->sh.i_type];
- int i;
- #if !RDO_SKIP_BS
- const int i_mb_pos_start = bs_pos( s );
- int i_mb_pos_tex;
- #endif
- if( h->sh.b_mbaff
- && (!(h->mb.i_mb_y & 1) || IS_SKIP(h->mb.type[h->mb.i_mb_xy - h->mb.i_mb_stride])) )
- {
- bs_write1( s, h->mb.b_interlaced );
- }
- #if !RDO_SKIP_BS
- if( i_mb_type == I_PCM )
- {
- uint8_t *p_start = s->p_start;
- bs_write_ue( s, i_mb_i_offset + 25 );
- i_mb_pos_tex = bs_pos( s );
- h->stat.frame.i_mv_bits += i_mb_pos_tex - i_mb_pos_start;
- bs_align_0( s );
- memcpy( s->p, h->mb.pic.p_fenc[0], 256 );
- s->p += 256;
- for( i = 0; i < 8; i++ )
- memcpy( s->p + i*8, h->mb.pic.p_fenc[1] + i*FENC_STRIDE, 8 );
- s->p += 64;
- for( i = 0; i < 8; i++ )
- memcpy( s->p + i*8, h->mb.pic.p_fenc[2] + i*FENC_STRIDE, 8 );
- s->p += 64;
- bs_init( s, s->p, s->p_end - s->p );
- s->p_start = p_start;
- /* if PCM is chosen, we need to store reconstructed frame data */
- h->mc.copy[PIXEL_16x16]( h->mb.pic.p_fdec[0], FDEC_STRIDE, h->mb.pic.p_fenc[0], FENC_STRIDE, 16 );
- h->mc.copy[PIXEL_8x8] ( h->mb.pic.p_fdec[1], FDEC_STRIDE, h->mb.pic.p_fenc[1], FENC_STRIDE, 8 );
- h->mc.copy[PIXEL_8x8] ( h->mb.pic.p_fdec[2], FDEC_STRIDE, h->mb.pic.p_fenc[2], FENC_STRIDE, 8 );
- h->stat.frame.i_tex_bits += bs_pos(s) - i_mb_pos_tex;
- return;
- }
- #endif
- /* Write:
- - type
- - prediction
- - mv */
- if( i_mb_type == I_4x4 || i_mb_type == I_8x8 )
- {
- int di = i_mb_type == I_8x8 ? 4 : 1;
- bs_write_ue( s, i_mb_i_offset + 0 );
- if( h->pps->b_transform_8x8_mode )
- bs_write1( s, h->mb.b_transform_8x8 );
- /* Prediction: Luma */
- for( i = 0; i < 16; i += di )
- {
- int i_pred = x264_mb_predict_intra4x4_mode( h, i );
- int i_mode = x264_mb_pred_mode4x4_fix( h->mb.cache.intra4x4_pred_mode[x264_scan8[i]] );
- if( i_pred == i_mode )
- bs_write1( s, 1 ); /* b_prev_intra4x4_pred_mode */
- else
- bs_write( s, 4, i_mode - (i_mode > i_pred) );
- }
- bs_write_ue( s, x264_mb_pred_mode8x8c_fix[ h->mb.i_chroma_pred_mode ] );
- }
- else if( i_mb_type == I_16x16 )
- {
- bs_write_ue( s, i_mb_i_offset + 1 + x264_mb_pred_mode16x16_fix[h->mb.i_intra16x16_pred_mode] +
- h->mb.i_cbp_chroma * 4 + ( h->mb.i_cbp_luma == 0 ? 0 : 12 ) );
- bs_write_ue( s, x264_mb_pred_mode8x8c_fix[ h->mb.i_chroma_pred_mode ] );
- }
- else if( i_mb_type == P_L0 )
- {
- if( h->mb.i_partition == D_16x16 )
- {
- bs_write1( s, 1 );
- if( h->mb.pic.i_fref[0] > 1 )
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- cavlc_mb_mvd( h, s, 0, 0, 4 );
- }
- else if( h->mb.i_partition == D_16x8 )
- {
- bs_write_ue( s, 1 );
- if( h->mb.pic.i_fref[0] > 1 )
- {
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[8]] );
- }
- cavlc_mb_mvd( h, s, 0, 0, 4 );
- cavlc_mb_mvd( h, s, 0, 8, 4 );
- }
- else if( h->mb.i_partition == D_8x16 )
- {
- bs_write_ue( s, 2 );
- if( h->mb.pic.i_fref[0] > 1 )
- {
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[4]] );
- }
- cavlc_mb_mvd( h, s, 0, 0, 2 );
- cavlc_mb_mvd( h, s, 0, 4, 2 );
- }
- }
- else if( i_mb_type == P_8x8 )
- {
- int b_sub_ref;
- if( (h->mb.cache.ref[0][x264_scan8[0]] | h->mb.cache.ref[0][x264_scan8[ 4]] |
- h->mb.cache.ref[0][x264_scan8[8]] | h->mb.cache.ref[0][x264_scan8[12]]) == 0 )
- {
- bs_write_ue( s, 4 );
- b_sub_ref = 0;
- }
- else
- {
- bs_write_ue( s, 3 );
- b_sub_ref = 1;
- }
- /* sub mb type */
- if( h->param.analyse.inter & X264_ANALYSE_PSUB8x8 )
- for( i = 0; i < 4; i++ )
- bs_write_ue( s, sub_mb_type_p_to_golomb[ h->mb.i_sub_partition[i] ] );
- else
- bs_write( s, 4, 0xf );
- /* ref0 */
- if( b_sub_ref )
- {
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[0]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[4]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[8]] );
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[12]] );
- }
- for( i = 0; i < 4; i++ )
- cavlc_mb8x8_mvd( h, s, i );
- }
- else if( i_mb_type == B_8x8 )
- {
- bs_write_ue( s, 22 );
- /* sub mb type */
- for( i = 0; i < 4; i++ )
- bs_write_ue( s, sub_mb_type_b_to_golomb[ h->mb.i_sub_partition[i] ] );
- /* ref */
- if( h->mb.pic.i_fref[0] > 1 )
- for( i = 0; i < 4; i++ )
- if( x264_mb_partition_listX_table[0][ h->mb.i_sub_partition[i] ] )
- bs_write_te( s, h->mb.pic.i_fref[0] - 1, h->mb.cache.ref[0][x264_scan8[i*4]] );
- if( h->mb.pic.i_fref[1] > 1 )
- for( i = 0; i < 4; i++ )
- if( x264_mb_partition_listX_table[1][ h->mb.i_sub_partition[i] ] )
- bs_write_te( s, h->mb.pic.i_fref[1] - 1, h->mb.cache.ref[1][x264_scan8[i*4]] );
- /* mvd */
- for( i = 0; i < 4; i++ )
- if( x264_mb_partition_listX_table[0][ h->mb.i_sub_partition[i] ] )
- cavlc_mb_mvd( h, s, 0, 4*i, 2 );
- for( i = 0; i < 4; i++ )
- if( x264_mb_partition_listX_table[1][ h->mb.i_sub_partition[i] ] )
- cavlc_mb_mvd( h, s, 1, 4*i, 2 );
- }
- else if( i_mb_type != B_DIRECT )
- {
- /* All B mode */
- /* Motion Vector */
- const uint8_t (*b_list)[2] = x264_mb_type_list_table[i_mb_type];
- const int i_ref0_max = h->mb.pic.i_fref[0] - 1;
- const int i_ref1_max = h->mb.pic.i_fref[1] - 1;
- bs_write_ue( s, mb_type_b_to_golomb[ h->mb.i_partition - D_16x8 ][ i_mb_type - B_L0_L0 ] );
- switch( h->mb.i_partition )
- {
- case D_16x16:
- if( i_ref0_max && b_list[0][0] ) bs_write_te( s, i_ref0_max, h->mb.cache.ref[0][x264_scan8[0]] );
- if( i_ref1_max && b_list[1][0] ) bs_write_te( s, i_ref1_max, h->mb.cache.ref[1][x264_scan8[0]] );
- if( b_list[0][0] ) cavlc_mb_mvd( h, s, 0, 0, 4 );
- if( b_list[1][0] ) cavlc_mb_mvd( h, s, 1, 0, 4 );
- break;
- case D_16x8:
- if( i_ref0_max && b_list[0][0] ) bs_write_te( s, i_ref0_max, h->mb.cache.ref[0][x264_scan8[0]] );
- if( i_ref0_max && b_list[0][1] ) bs_write_te( s, i_ref0_max, h->mb.cache.ref[0][x264_scan8[8]] );
- if( i_ref1_max && b_list[1][0] ) bs_write_te( s, i_ref1_max, h->mb.cache.ref[1][x264_scan8[0]] );
- if( i_ref1_max && b_list[1][1] ) bs_write_te( s, i_ref1_max, h->mb.cache.ref[1][x264_scan8[8]] );
- if( b_list[0][0] ) cavlc_mb_mvd( h, s, 0, 0, 4 );
- if( b_list[0][1] ) cavlc_mb_mvd( h, s, 0, 8, 4 );
- if( b_list[1][0] ) cavlc_mb_mvd( h, s, 1, 0, 4 );
- if( b_list[1][1] ) cavlc_mb_mvd( h, s, 1, 8, 4 );
- break;
- case D_8x16:
- if( i_ref0_max && b_list[0][0] ) bs_write_te( s, i_ref0_max, h->mb.cache.ref[0][x264_scan8[0]] );
- if( i_ref0_max && b_list[0][1] ) bs_write_te( s, i_ref0_max, h->mb.cache.ref[0][x264_scan8[4]] );
- if( i_ref1_max && b_list[1][0] ) bs_write_te( s, i_ref1_max, h->mb.cache.ref[1][x264_scan8[0]] );
- if( i_ref1_max && b_list[1][1] ) bs_write_te( s, i_ref1_max, h->mb.cache.ref[1][x264_scan8[4]] );
- if( b_list[0][0] ) cavlc_mb_mvd( h, s, 0, 0, 2 );
- if( b_list[0][1] ) cavlc_mb_mvd( h, s, 0, 4, 2 );
- if( b_list[1][0] ) cavlc_mb_mvd( h, s, 1, 0, 2 );
- if( b_list[1][1] ) cavlc_mb_mvd( h, s, 1, 4, 2 );
- break;
- }
- }
- else //if( i_mb_type == B_DIRECT )
- bs_write1( s, 1 );
- #if !RDO_SKIP_BS
- i_mb_pos_tex = bs_pos( s );
- h->stat.frame.i_mv_bits += i_mb_pos_tex - i_mb_pos_start;
- #endif
- /* Coded block patern */
- if( i_mb_type == I_4x4 || i_mb_type == I_8x8 )
- bs_write_ue( s, intra4x4_cbp_to_golomb[( h->mb.i_cbp_chroma << 4 )|h->mb.i_cbp_luma] );
- else if( i_mb_type != I_16x16 )
- bs_write_ue( s, inter_cbp_to_golomb[( h->mb.i_cbp_chroma << 4 )|h->mb.i_cbp_luma] );
- /* transform size 8x8 flag */
- if( x264_mb_transform_8x8_allowed( h ) && h->mb.i_cbp_luma )
- bs_write1( s, h->mb.b_transform_8x8 );
- /* write residual */
- if( i_mb_type == I_16x16 )
- {
- cavlc_qp_delta( h, s );
- /* DC Luma */
- block_residual_write_cavlc( h, s, DCT_LUMA_DC, 24 , h->dct.luma16x16_dc );
- /* AC Luma */
- if( h->mb.i_cbp_luma )
- for( i = 0; i < 16; i++ )
- block_residual_write_cavlc( h, s, DCT_LUMA_AC, i, h->dct.luma4x4[i]+1 );
- }
- else if( h->mb.i_cbp_luma | h->mb.i_cbp_chroma )
- {
- cavlc_qp_delta( h, s );
- x264_macroblock_luma_write_cavlc( h, s, 0, 3 );
- }
- if( h->mb.i_cbp_chroma )
- {
- /* Chroma DC residual present */
- block_residual_write_cavlc( h, s, DCT_CHROMA_DC, 25, h->dct.chroma_dc[0] );
- block_residual_write_cavlc( h, s, DCT_CHROMA_DC, 26, h->dct.chroma_dc[1] );
- if( h->mb.i_cbp_chroma&0x02 ) /* Chroma AC residual present */
- for( i = 16; i < 24; i++ )
- block_residual_write_cavlc( h, s, DCT_CHROMA_AC, i, h->dct.luma4x4[i]+1 );
- }
- #if !RDO_SKIP_BS
- h->stat.frame.i_tex_bits += bs_pos(s) - i_mb_pos_tex;
- #endif
- }
- #if RDO_SKIP_BS
- /*****************************************************************************
- * RD only; doesn't generate a valid bitstream
- * doesn't write cbp or chroma dc (I don't know how much this matters)
- * doesn't write ref (never varies between calls, so no point in doing so)
- * only writes subpartition for p8x8, needed for sub-8x8 mode decision RDO
- * works on all partition sizes except 16x16
- *****************************************************************************/
- static int x264_partition_size_cavlc( x264_t *h, int i8, int i_pixel )
- {
- const int i_mb_type = h->mb.i_type;
- int b_8x16 = h->mb.i_partition == D_8x16;
- int j;
- h->out.bs.i_bits_encoded = 0;
- if( i_mb_type == P_8x8 )
- {
- cavlc_mb8x8_mvd( h, &h->out.bs, i8 );
- bs_write_ue( &h->out.bs, sub_mb_type_p_to_golomb[ h->mb.i_sub_partition[i8] ] );
- }
- else if( i_mb_type == P_L0 )
- cavlc_mb_mvd( h, &h->out.bs, 0, 4*i8, 4>>b_8x16 );
- else if( i_mb_type > B_DIRECT && i_mb_type < B_8x8 )
- {
- if( x264_mb_type_list_table[ i_mb_type ][0][!!i8] ) cavlc_mb_mvd( h, &h->out.bs, 0, 4*i8, 4>>b_8x16 );
- if( x264_mb_type_list_table[ i_mb_type ][1][!!i8] ) cavlc_mb_mvd( h, &h->out.bs, 1, 4*i8, 4>>b_8x16 );
- }
- else //if( i_mb_type == B_8x8 )
- {
- if( x264_mb_partition_listX_table[0][ h->mb.i_sub_partition[i8] ] )
- cavlc_mb_mvd( h, &h->out.bs, 0, 4*i8, 2 );
- if( x264_mb_partition_listX_table[1][ h->mb.i_sub_partition[i8] ] )
- cavlc_mb_mvd( h, &h->out.bs, 1, 4*i8, 2 );
- }
- for( j = (i_pixel < PIXEL_8x8); j >= 0; j-- )
- {
- x264_macroblock_luma_write_cavlc( h, &h->out.bs, i8, i8 );
- block_residual_write_cavlc( h, &h->out.bs, DCT_CHROMA_AC, 16+i8, h->dct.luma4x4[16+i8]+1 );
- block_residual_write_cavlc( h, &h->out.bs, DCT_CHROMA_AC, 20+i8, h->dct.luma4x4[20+i8]+1 );
- i8 += x264_pixel_size[i_pixel].h >> 3;
- }
- return h->out.bs.i_bits_encoded;
- }
- static int x264_subpartition_size_cavlc( x264_t *h, int i4, int i_pixel )
- {
- int b_8x4 = i_pixel == PIXEL_8x4;
- h->out.bs.i_bits_encoded = 0;
- cavlc_mb_mvd( h, &h->out.bs, 0, i4, 1+b_8x4 );
- block_residual_write_cavlc( h, &h->out.bs, DCT_LUMA_4x4, i4, h->dct.luma4x4[i4] );
- if( i_pixel != PIXEL_4x4 )
- {
- i4 += 2-b_8x4;
- block_residual_write_cavlc( h, &h->out.bs, DCT_LUMA_4x4, i4, h->dct.luma4x4[i4] );
- }
- return h->out.bs.i_bits_encoded;
- }
- static int cavlc_intra4x4_pred_size( x264_t *h, int i4, int i_mode )
- {
- if( x264_mb_predict_intra4x4_mode( h, i4 ) == x264_mb_pred_mode4x4_fix( i_mode ) )
- return 1;
- else
- return 4;
- }
- static int x264_partition_i8x8_size_cavlc( x264_t *h, int i8, int i_mode )
- {
- h->out.bs.i_bits_encoded = cavlc_intra4x4_pred_size( h, 4*i8, i_mode );
- bs_write_ue( &h->out.bs, intra4x4_cbp_to_golomb[( h->mb.i_cbp_chroma << 4 )|h->mb.i_cbp_luma] );
- x264_macroblock_luma_write_cavlc( h, &h->out.bs, i8, i8 );
- return h->out.bs.i_bits_encoded;
- }
- static int x264_partition_i4x4_size_cavlc( x264_t *h, int i4, int i_mode )
- {
- h->out.bs.i_bits_encoded = cavlc_intra4x4_pred_size( h, i4, i_mode );
- block_residual_write_cavlc( h, &h->out.bs, DCT_LUMA_4x4, i4, h->dct.luma4x4[i4] );
- return h->out.bs.i_bits_encoded;
- }
- static int x264_i8x8_chroma_size_cavlc( x264_t *h )
- {
- h->out.bs.i_bits_encoded = bs_size_ue( x264_mb_pred_mode8x8c_fix[ h->mb.i_chroma_pred_mode ] );
- if( h->mb.i_cbp_chroma )
- {
- block_residual_write_cavlc( h, &h->out.bs, DCT_CHROMA_DC, 25, h->dct.chroma_dc[0] );
- block_residual_write_cavlc( h, &h->out.bs, DCT_CHROMA_DC, 26, h->dct.chroma_dc[1] );
- if( h->mb.i_cbp_chroma == 2 )
- {
- int i;
- for( i = 16; i < 24; i++ )
- block_residual_write_cavlc( h, &h->out.bs, DCT_CHROMA_AC, i, h->dct.luma4x4[i]+1 );
- }
- }
- return h->out.bs.i_bits_encoded;
- }
- #endif