www.pudn.com > h264src.zip > cabac.c
/*****************************************************************************
*
* T264 AVC CODEC
*
* Copyright(C) 2004-2005 joylife
* 2004-2005 tricro
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
****************************************************************************/
/*****************************************************************************
* cabac.c: h264 encoder library
*****************************************************************************
* Copyright (C) 2003 Laurent Aimar
*
* Authors: Laurent Aimar
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*Note: the CABAC routine is currently referenced from x264 temporarily, with adaptation to
*the data structure of T264. It should be modified further in the near future.
*It's can support B slice, but only with MB mode P16x16, P16x8, P8x16, Direct16x16, B_SKIP
*ie., B8x8 is not support now
*/
#include
#include
#include
#include
#include "T264.h"
#include "cabac_engine.h"
#include "inter.h"
/* From ffmpeg
*/
#define T264_SCAN8_SIZE (6*8)
#define T264_SCAN8_0 (4+1*8)
static const int T264_scan8[16+2*4] =
{
/* Luma */
VEC_LUMA + 0, VEC_LUMA + 1, VEC_LUMA + 1*8 + 0, VEC_LUMA + 1*8 + 1,
VEC_LUMA + 2, VEC_LUMA + 3, VEC_LUMA + 1*8 + 2, VEC_LUMA + 1*8 + 3,
VEC_LUMA + 2*8 + 0, VEC_LUMA + 2*8 + 1, VEC_LUMA + 3*8 + 0, VEC_LUMA + 3*8 + 1,
VEC_LUMA + 2*8 + 2, VEC_LUMA + 2*8 + 3, VEC_LUMA + 3*8 + 2, VEC_LUMA + 3*8 + 3,
/* Cb */
NNZ_CHROMA0 + 0, NNZ_CHROMA0 + 1,
NNZ_CHROMA0 + 1*8 + 0, NNZ_CHROMA0 + 1*8 + 1,
/* Cr */
NNZ_CHROMA1 + 0, NNZ_CHROMA1 + 1,
NNZ_CHROMA1 + 1*8 + 0, NNZ_CHROMA1 + 1*8 + 1,
};
static const uint8_t block_idx_xy[4][4] =
{
{ 0, 2, 8, 10},
{ 1, 3, 9, 11},
{ 4, 6, 12, 14},
{ 5, 7, 13, 15}
};
#define IS_INTRA(mode) (mode == I_4x4 || mode == I_16x16)
#define IS_SKIP(type) ( (type) == P_SKIP || (type) == B_SKIP )
enum {
INTRA_4x4 = 0,
INTRA_16x16 = 1,
INTRA_PCM = 2,
P_L0 = 3,
P_8x81 = 4,
P_SKIP1 = 5,
B_DIRECT = 6,
B_L0_L0 = 7,
B_L0_L1 = 8,
B_L0_BI = 9,
B_L1_L0 = 10,
B_L1_L1 = 11,
B_L1_BI = 12,
B_BI_L0 = 13,
B_BI_L1 = 14,
B_BI_BI = 15,
B_8x81 = 16,
B_SKIP1 = 17,
};
static const int T264_mb_partition_listX_table[][2] =
{
{0, 0}, //B_DIRECT_8x8 = 100,
{1, 0}, //B_L0_8x8,
{0, 1}, //B_L1_8x8,
{1, 1}, //B_Bi_8x8,
{1, 0}, //B_L0_8x4,
{1, 0}, //B_L0_4x8,
{0, 1}, //B_L1_8x4,
{0, 1}, //B_L1_4x8,
{1, 1}, //B_Bi_8x4,
{1, 1}, //B_Bi_4x8,
{1, 0}, //B_L0_4x4,
{0, 1}, //B_L1_4x4,
{1, 1} //B_Bi_4x4
};
static const int T264_mb_type_list0_table[18][2] =
{
{0,0}, {0,0}, {0,0}, /* INTRA */
{1,1}, /* P_L0 */
{0,0}, /* P_8x8 */
{1,1}, /* P_SKIP */
{0,0}, /* B_DIRECT */
{1,1}, {1,0}, {1,1}, /* B_L0_* */
{0,1}, {0,0}, {0,1}, /* B_L1_* */
{1,1}, {1,0}, {1,1}, /* B_BI_* */
{0,0}, /* B_8x8 */
{0,0} /* B_SKIP */
};
static const int T264_mb_type_list1_table[18][2] =
{
{0,0}, {0,0}, {0,0}, /* INTRA */
{0,0}, /* P_L0 */
{0,0}, /* P_8x8 */
{0,0}, /* P_SKIP */
{0,0}, /* B_DIRECT */
{0,0}, {0,1}, {0,1}, /* B_L0_* */
{1,0}, {1,1}, {1,1}, /* B_L1_* */
{1,0}, {1,1}, {1,1}, /* B_BI_* */
{0,0}, /* B_8x8 */
{0,0} /* B_SKIP */
};
static void T264_cabac_mb_type( T264_t *t )
{
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
int32_t mb_mode = t->mb.mb_mode;
if( t->slice_type == SLICE_I )
{
int ctx = 0;
if( t->mb.mb_x > 0 && mb_ctxs[t->mb.mb_xy-1].mb_mode != I_4x4 )
{
ctx++;
}
if( t->mb.mb_y > 0 && mb_ctxs[t->mb.mb_xy - t->mb_stride].mb_mode != I_4x4 )
{
ctx++;
}
if( mb_mode == I_4x4 )
{
T264_cabac_encode_decision( &t->cabac, 3 + ctx, 0 );
}
else if(mb_mode == I_16x16) /* I_16x16 */
{
T264_cabac_encode_decision( &t->cabac, 3 + ctx, 1 );
T264_cabac_encode_terminal( &t->cabac, 0 );
T264_cabac_encode_decision( &t->cabac, 3 + 3, ( t->mb.cbp_y == 0 ? 0 : 1 ));
if( t->mb.cbp_c == 0 )
{
T264_cabac_encode_decision( &t->cabac, 3 + 4, 0 );
}
else
{
T264_cabac_encode_decision( &t->cabac, 3 + 4, 1 );
T264_cabac_encode_decision( &t->cabac, 3 + 5, ( t->mb.cbp_c == 1 ? 0 : 1 ) );
}
T264_cabac_encode_decision( &t->cabac, 3 + 6, ( (t->mb.mode_i16x16 / 2) ? 1 : 0 ));
T264_cabac_encode_decision( &t->cabac, 3 + 7, ( (t->mb.mode_i16x16 % 2) ? 1 : 0 ));
}
else /* I_PCM */
{
T264_cabac_encode_decision( &t->cabac, 3 + ctx, 1 );
T264_cabac_encode_terminal( &t->cabac, 1 );
}
}
else if( t->slice_type == SLICE_P )
{
/* prefix: 14, suffix: 17 */
if( mb_mode == P_MODE )
{
if( t->mb.mb_part == MB_16x16 )
{
T264_cabac_encode_decision( &t->cabac, 14, 0 );
T264_cabac_encode_decision( &t->cabac, 15, 0 );
T264_cabac_encode_decision( &t->cabac, 16, 0 );
}
else if( t->mb.mb_part == MB_16x8 )
{
T264_cabac_encode_decision( &t->cabac, 14, 0 );
T264_cabac_encode_decision( &t->cabac, 15, 1 );
T264_cabac_encode_decision( &t->cabac, 17, 1 );
}
else if( t->mb.mb_part == MB_8x16 )
{
T264_cabac_encode_decision( &t->cabac, 14, 0 );
T264_cabac_encode_decision( &t->cabac, 15, 1 );
T264_cabac_encode_decision( &t->cabac, 17, 0 );
}
else /* P8x8 mode */
{
T264_cabac_encode_decision( &t->cabac, 14, 0 );
T264_cabac_encode_decision( &t->cabac, 15, 0 );
T264_cabac_encode_decision( &t->cabac, 16, 1 );
}
}
else if( mb_mode == I_4x4 )
{
/* prefix */
T264_cabac_encode_decision( &t->cabac, 14, 1 );
T264_cabac_encode_decision( &t->cabac, 17, 0 );
}
else if(mb_mode == I_16x16) /* intra 16x16 */
{
/* prefix */
T264_cabac_encode_decision( &t->cabac, 14, 1 );
/* suffix */
T264_cabac_encode_decision( &t->cabac, 17, 1 );
T264_cabac_encode_terminal( &t->cabac, 0 ); /*ctxIdx == 276 */
T264_cabac_encode_decision( &t->cabac, 17+1, ( t->mb.cbp_y == 0 ? 0 : 1 ));
if( t->mb.cbp_c == 0 )
{
T264_cabac_encode_decision( &t->cabac, 17+2, 0 );
}
else
{
T264_cabac_encode_decision( &t->cabac, 17+2, 1 );
T264_cabac_encode_decision( &t->cabac, 17+2, ( t->mb.cbp_c == 1 ? 0 : 1 ) );
}
T264_cabac_encode_decision( &t->cabac, 17+3, ( (t->mb.mode_i16x16 / 2) ? 1 : 0 ));
T264_cabac_encode_decision( &t->cabac, 17+3, ( (t->mb.mode_i16x16 % 2) ? 1 : 0 ));
}
else /* I_PCM */
{
/* prefix */
T264_cabac_encode_decision( &t->cabac, 14, 1 );
T264_cabac_encode_decision( &t->cabac, 17, 1 );
T264_cabac_encode_terminal( &t->cabac, 1 ); /*ctxIdx == 276 */
}
}
else if( t->slice_type == SLICE_B )
{
int ctx = 0;
if( t->mb.mb_x > 0 && mb_ctxs[t->mb.mb_xy-1].mb_mode != B_SKIP && !mb_ctxs[t->mb.mb_xy-1].is_copy )
{
ctx++;
}
if( t->mb.mb_y > 0 && mb_ctxs[t->mb.mb_xy - t->mb_stride].mb_mode != B_SKIP && ! mb_ctxs[t->mb.mb_xy - t->mb_stride].is_copy)
{
ctx++;
}
if( t->mb.is_copy)
{
T264_cabac_encode_decision( &t->cabac, 27+ctx, 0 );
}
else if( t->mb.mb_part == MB_8x8 )
{
T264_cabac_encode_decision( &t->cabac, 27+ctx, 1 );
T264_cabac_encode_decision( &t->cabac, 27+3, 1 );
T264_cabac_encode_decision( &t->cabac, 27+4, 1 );
T264_cabac_encode_decision( &t->cabac, 27+5, 1 );
T264_cabac_encode_decision( &t->cabac, 27+5, 1 );
T264_cabac_encode_decision( &t->cabac, 27+5, 1 );
}
else if( IS_INTRA( mb_mode ) )
{
/* prefix */
T264_cabac_encode_decision( &t->cabac, 27+ctx, 1 );
T264_cabac_encode_decision( &t->cabac, 27+3, 1 );
T264_cabac_encode_decision( &t->cabac, 27+4, 1 );
T264_cabac_encode_decision( &t->cabac, 27+5, 1 );
T264_cabac_encode_decision( &t->cabac, 27+5, 0 );
T264_cabac_encode_decision( &t->cabac, 27+5, 1 );
/* Suffix */
if( mb_mode == I_4x4 )
{
T264_cabac_encode_decision( &t->cabac, 32, 0 );
}
else if(mb_mode == I_16x16)
{
T264_cabac_encode_decision( &t->cabac, 32, 1 );
T264_cabac_encode_terminal( &t->cabac, 0 );
/* TODO */
T264_cabac_encode_decision( &t->cabac, 32+1, ( t->mb.cbp_y == 0 ? 0 : 1 ));
if( t->mb.cbp_c == 0 )
{
T264_cabac_encode_decision( &t->cabac, 32+2, 0 );
}
else
{
T264_cabac_encode_decision( &t->cabac, 32+2, 1 );
T264_cabac_encode_decision( &t->cabac, 32+2, ( t->mb.cbp_c == 1 ? 0 : 1 ) );
}
T264_cabac_encode_decision( &t->cabac, 32+3, ( (t->mb.mode_i16x16 / 2) ? 1 : 0 ));
T264_cabac_encode_decision( &t->cabac, 32+3, ( (t->mb.mode_i16x16 % 2) ? 1 : 0 ));
}
else /* I_PCM */
{
T264_cabac_encode_decision( &t->cabac, 32, 1 );
T264_cabac_encode_terminal( &t->cabac, 1 );
}
}
else
{
static const int i_mb_len[21] =
{
3, 6, 6, /* L0 L0 */
3, 6, 6, /* L1 L1 */
6, 7, 7, /* BI BI */
6, 6, /* L0 L1 */
6, 6, /* L1 L0 */
7, 7, /* L0 BI */
7, 7, /* L1 BI */
7, 7, /* BI L0 */
7, 7, /* BI L1 */
};
static const int i_mb_bits[21][7] =
{
{ 1, 0, 0, }, { 1, 1, 0, 0, 0, 1, }, { 1, 1, 0, 0, 1, 0, }, /* L0 L0 */
{ 1, 0, 1, }, { 1, 1, 0, 0, 1, 1, }, { 1, 1, 0, 1, 0, 0, }, /* L1 L1 */
{ 1, 1, 0, 0, 0, 0 ,}, { 1, 1, 1, 1, 0, 0 , 0 }, { 1, 1, 1, 1, 0, 0 , 1 },/* BI BI */
{ 1, 1, 0, 1, 0, 1, }, { 1, 1, 0, 1, 1, 0, }, /* L0 L1 */
{ 1, 1, 0, 1, 1, 1, }, { 1, 1, 1, 1, 1, 0, }, /* L1 L0 */
{ 1, 1, 1, 0, 0, 0, 0 }, { 1, 1, 1, 0, 0, 0, 1 }, /* L0 BI */
{ 1, 1, 1, 0, 0, 1, 0 }, { 1, 1, 1, 0, 0, 1, 1 }, /* L1 BI */
{ 1, 1, 1, 0, 1, 0, 0 }, { 1, 1, 1, 0, 1, 0, 1 }, /* BI L0 */
{ 1, 1, 1, 0, 1, 1, 0 }, { 1, 1, 1, 0, 1, 1, 1 } /* BI L1 */
};
const int i_partition = t->mb.mb_part;
int idx = 0;
int i, b_part_mode, part_mode0, part_mode1;
static const int b_part_mode_map[3][3] = {
{ B_L0_L0, B_L0_L1, B_L0_BI },
{ B_L1_L0, B_L1_L1, B_L1_BI },
{ B_BI_L0, B_BI_L1, B_BI_BI }
};
switch(t->mb.mb_part)
{
case MB_16x16:
part_mode0 = t->mb.mb_part2[0] - B_L0_16x16;
b_part_mode = b_part_mode_map[part_mode0][part_mode0];
break;
case MB_16x8:
part_mode0 = t->mb.mb_part2[0] - B_L0_16x8;
part_mode1 = t->mb.mb_part2[1] - B_L0_16x8;
b_part_mode = b_part_mode_map[part_mode0][part_mode1];
break;
case MB_8x16:
part_mode0 = t->mb.mb_part2[0] - B_L0_8x16;
part_mode1 = t->mb.mb_part2[1] - B_L0_8x16;
b_part_mode = b_part_mode_map[part_mode0][part_mode1];
break;
}
switch( b_part_mode )
{
/* D_16x16, D_16x8, D_8x16 */
case B_BI_BI: idx += 3;
case B_L1_L1: idx += 3;
case B_L0_L0:
if( i_partition == MB_16x8 )
idx += 1;
else if( i_partition == MB_8x16 )
idx += 2;
break;
/* D_16x8, D_8x16 */
case B_BI_L1: idx += 2;
case B_BI_L0: idx += 2;
case B_L1_BI: idx += 2;
case B_L0_BI: idx += 2;
case B_L1_L0: idx += 2;
case B_L0_L1:
idx += 3*3;
if( i_partition == MB_8x16 )
idx++;
break;
default:
return;
}
T264_cabac_encode_decision( &t->cabac, 27+ctx, i_mb_bits[idx][0] );
T264_cabac_encode_decision( &t->cabac, 27+3, i_mb_bits[idx][1] );
T264_cabac_encode_decision( &t->cabac, 27+(i_mb_bits[idx][1] != 0 ? 4 : 5), i_mb_bits[idx][2] );
for( i = 3; i < i_mb_len[idx]; i++ )
{
T264_cabac_encode_decision( &t->cabac, 27+5, i_mb_bits[idx][i] );
}
}
}
else
{
//dummy here
}
}
static void T264_cabac_mb_intra4x4_pred_mode( T264_t *t, int i_pred, int i_mode )
{
if( i_pred == i_mode )
{
/* b_prev_intra4x4_pred_mode */
T264_cabac_encode_decision( &t->cabac, 68, 1 );
}
else
{
/* b_prev_intra4x4_pred_mode */
T264_cabac_encode_decision( &t->cabac, 68, 0 );
if( i_mode > i_pred )
{
i_mode--;
}
T264_cabac_encode_decision( &t->cabac, 69, (i_mode )&0x01 );
T264_cabac_encode_decision( &t->cabac, 69, (i_mode >> 1)&0x01 );
T264_cabac_encode_decision( &t->cabac, 69, (i_mode >> 2)&0x01 );
}
}
static void T264_cabac_mb_intra8x8_pred_mode( T264_t *t )
{
const int i_mode = t->mb.mb_mode_uv;
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
int ctx = 0;
if( t->mb.mb_x > 0 && mb_ctxs[t->mb.mb_xy-1].mb_mode_uv != Intra_8x8_DC)
{
ctx++;
}
if( t->mb.mb_y > 0 && mb_ctxs[t->mb.mb_xy - t->mb_stride].mb_mode_uv != Intra_8x8_DC )
{
ctx++;
}
if( i_mode == Intra_8x8_DC )
{
T264_cabac_encode_decision( &t->cabac, 64 + ctx, Intra_8x8_DC );
}
else
{
T264_cabac_encode_decision( &t->cabac, 64 + ctx, 1 );
T264_cabac_encode_decision( &t->cabac, 64 + 3, ( i_mode == 1 ? 0 : 1 ) );
if( i_mode > 1 )
{
T264_cabac_encode_decision( &t->cabac, 64 + 3, ( i_mode == 2 ? 0 : 1 ) );
}
}
}
static void T264_cabac_mb_cbp_luma( T264_t *t )
{
/* TODO: clean up and optimize */
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
int i8x8;
for( i8x8 = 0; i8x8 < 4; i8x8++ )
{
int i_mba_xy = -1;
int i_mbb_xy = -1;
int x = luma_inverse_x[4*i8x8];
int y = luma_inverse_y[4*i8x8];
int ctx = 0;
if( x > 0 )
i_mba_xy = t->mb.mb_xy;
else if( t->mb.mb_x > 0 )
i_mba_xy = t->mb.mb_xy - 1;
if( y > 0 )
i_mbb_xy = t->mb.mb_xy;
else if( t->mb.mb_y > 0 )
i_mbb_xy = t->mb.mb_xy - t->mb_stride;
/* No need to test for PCM and SKIP */
if( i_mba_xy >= 0 )
{
const int i8x8a = block_idx_xy[(x-1)&0x03][y]/4;
if( ((mb_ctxs[i_mba_xy].cbp_y >> i8x8a)&0x01) == 0 )
{
ctx++;
}
}
if( i_mbb_xy >= 0 )
{
const int i8x8b = block_idx_xy[x][(y-1)&0x03]/4;
if( ((mb_ctxs[i_mbb_xy].cbp_y >> i8x8b)&0x01) == 0 )
{
ctx += 2;
}
}
T264_cabac_encode_decision( &t->cabac, 73 + ctx, (t->mb.cbp_y >> i8x8)&0x01 );
}
}
static void T264_cabac_mb_cbp_chroma( T264_t *t )
{
int cbp_a = -1;
int cbp_b = -1;
int ctx;
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
/* No need to test for SKIP/PCM */
if( t->mb.mb_x > 0 )
{
cbp_a = (mb_ctxs[t->mb.mb_xy - 1].cbp_c)&0x3;
}
if( t->mb.mb_y > 0 )
{
cbp_b = (mb_ctxs[t->mb.mb_xy - t->mb_stride].cbp_c)&0x3;
}
ctx = 0;
if( cbp_a > 0 ) ctx++;
if( cbp_b > 0 ) ctx += 2;
if( t->mb.cbp_c == 0 )
{
T264_cabac_encode_decision( &t->cabac, 77 + ctx, 0 );
}
else
{
T264_cabac_encode_decision( &t->cabac, 77 + ctx, 1 );
ctx = 4;
if( cbp_a == 2 ) ctx++;
if( cbp_b == 2 ) ctx += 2;
T264_cabac_encode_decision( &t->cabac, 77 + ctx, t->mb.cbp_c > 1 ? 1 : 0 );
}
}
/* TODO check it with != qp per mb */
static void T264_cabac_mb_qp_delta( T264_t *t )
{
int i_mbn_xy = t->mb.mb_xy - 1;
int i_dqp = t->mb.mb_qp_delta;
int val = i_dqp <= 0 ? (-2*i_dqp) : (2*i_dqp - 1);
int ctx;
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
/* No need to test for PCM / SKIP */
if( i_mbn_xy >= 0 && mb_ctxs[i_mbn_xy].mb_qp_delta != 0 &&
( mb_ctxs[i_mbn_xy].mb_mode == I_16x16 || mb_ctxs[i_mbn_xy].cbp_y || mb_ctxs[i_mbn_xy].cbp_c) )
ctx = 1;
else
ctx = 0;
while( val > 0 )
{
T264_cabac_encode_decision( &t->cabac, 60 + ctx, 1 );
if( ctx < 2 )
ctx = 2;
else
ctx = 3;
val--;
}
T264_cabac_encode_decision( &t->cabac, 60 + ctx, 0 );
}
void T264_cabac_mb_skip( T264_t *t, int b_skip )
{
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
int ctx = 0;
if( t->mb.mb_x > 0 && !IS_SKIP( mb_ctxs[t->mb.mb_xy -1].mb_mode) )
{
ctx++;
}
if( t->mb.mb_y > 0 && !IS_SKIP( mb_ctxs[t->mb.mb_xy - t->mb_stride].mb_mode) )
{
ctx++;
}
if( t->slice_type == SLICE_P )
T264_cabac_encode_decision( &t->cabac, 11 + ctx, b_skip ? 1 : 0 );
else /* SLICE_TYPE_B */
T264_cabac_encode_decision( &t->cabac, 24 + ctx, b_skip ? 1 : 0 );
}
static __inline void T264_cabac_mb_sub_p_partition( T264_t *t, int i_sub )
{
if( i_sub == MB_8x8 )
{
T264_cabac_encode_decision( &t->cabac, 21, 1 );
}
else if( i_sub == MB_8x4 )
{
T264_cabac_encode_decision( &t->cabac, 21, 0 );
T264_cabac_encode_decision( &t->cabac, 22, 0 );
}
else if( i_sub == MB_4x8 )
{
T264_cabac_encode_decision( &t->cabac, 21, 0 );
T264_cabac_encode_decision( &t->cabac, 22, 1 );
T264_cabac_encode_decision( &t->cabac, 23, 1 );
}
else if( i_sub == MB_4x4 )
{
T264_cabac_encode_decision( &t->cabac, 21, 0 );
T264_cabac_encode_decision( &t->cabac, 22, 1 );
T264_cabac_encode_decision( &t->cabac, 23, 0 );
}
}
static __inline void T264_cabac_mb_sub_b_partition( T264_t *t, int i_sub )
{
if( i_sub == B_DIRECT_8x8 )
{
T264_cabac_encode_decision( &t->cabac, 36, 0 );
}
else if( i_sub == B_L0_8x8 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
}
else if( i_sub == B_L1_8x8 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
}
else if( i_sub == B_Bi_8x8 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
}
else if( i_sub == B_L0_8x4 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
}
else if( i_sub == B_L0_4x8 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
}
else if( i_sub == B_L1_8x4 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
}
else if( i_sub == B_L1_4x8 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
}
else if( i_sub == B_Bi_8x4 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
}
else if( i_sub == B_Bi_4x8 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
}
else if( i_sub == B_L0_4x4 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
}
else if( i_sub == B_L1_4x4 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 0 );
}
else if( i_sub == B_Bi_4x4 )
{
T264_cabac_encode_decision( &t->cabac, 36, 1 );
T264_cabac_encode_decision( &t->cabac, 37, 1 );
T264_cabac_encode_decision( &t->cabac, 38, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
T264_cabac_encode_decision( &t->cabac, 39, 1 );
}
}
static __inline void T264_cabac_mb_ref( T264_t *t, int i_list, int idx )
{
const int i8 = T264_scan8[idx];
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
const int i_refa = t->mb.vec_ref[i8 - 1].vec[i_list].refno;
const int i_refb = t->mb.vec_ref[i8 - 8].vec[i_list].refno;
int i_ref = t->mb.vec_ref[i8].vec[i_list].refno;
int a_direct, b_direct;
int ctx = 0;
int luma_idx = luma_index[idx];
if( t->slice_type==SLICE_B && t->mb.mb_x > 0 && (mb_ctxs[t->mb.mb_xy-1].mb_mode == B_SKIP||mb_ctxs[t->mb.mb_xy-1].is_copy ) && (luma_idx&0x03)==0)
{
a_direct = 1;
}
else
a_direct = 0;
if( t->slice_type==SLICE_B && t->mb.mb_y > 0 && (mb_ctxs[t->mb.mb_xy - t->mb_stride].mb_mode == B_SKIP||mb_ctxs[t->mb.mb_xy - t->mb_stride].is_copy) && luma_idx<4)
{
b_direct = 1;
}
else
b_direct = 0;
if( i_refa>0 && !a_direct)
ctx++;
if( i_refb>0 && !b_direct)
ctx += 2;
while( i_ref > 0 )
{
T264_cabac_encode_decision( &t->cabac, 54 + ctx, 1 );
if( ctx < 4 )
ctx = 4;
else
ctx = 5;
i_ref--;
}
T264_cabac_encode_decision( &t->cabac, 54 + ctx, 0 );
}
static __inline void T264_cabac_mb_mvd_cpn( T264_t *t, int i_list, int i8, int l, int mvd )
{
const int amvd = abs( t->mb.mvd_ref[i_list][i8 - 1][l] ) +
abs( t->mb.mvd_ref[i_list][i8 - 8][l] );
const int i_abs = abs( mvd );
const int i_prefix = T264_MIN( i_abs, 9 );
const int ctxbase = (l == 0 ? 40 : 47);
int ctx;
int i;
if( amvd < 3 )
ctx = 0;
else if( amvd > 32 )
ctx = 2;
else
ctx = 1;
for( i = 0; i < i_prefix; i++ )
{
T264_cabac_encode_decision( &t->cabac, ctxbase + ctx, 1 );
if( ctx < 3 )
ctx = 3;
else if( ctx < 6 )
ctx++;
}
if( i_prefix < 9 )
{
T264_cabac_encode_decision( &t->cabac, ctxbase + ctx, 0 );
}
if( i_prefix >= 9 )
{
int i_suffix = i_abs - 9;
int k = 3;
while( i_suffix >= (1<cabac, 1 );
i_suffix -= 1 << k;
k++;
}
T264_cabac_encode_bypass( &t->cabac, 0 );
while( k-- )
{
T264_cabac_encode_bypass( &t->cabac, (i_suffix >> k)&0x01 );
}
}
/* sign */
if( mvd > 0 )
T264_cabac_encode_bypass( &t->cabac, 0 );
else if( mvd < 0 )
T264_cabac_encode_bypass( &t->cabac, 1 );
}
static __inline void T264_cabac_mb_mvd( T264_t *t, int i_list, int idx, int width, int height )
{
T264_vector_t mvp;
int mdx, mdy;
int i, j;
int i8 = T264_scan8[idx];
int luma_idx = luma_index[idx];
/* Calculate mvd */
mvp.refno = t->mb.vec_ref[i8].vec[i_list].refno;
T264_predict_mv( t, i_list, luma_idx, width, &mvp );
mdx = t->mb.vec_ref[i8].vec[i_list].x - mvp.x;
mdy = t->mb.vec_ref[i8].vec[i_list].y - mvp.y;
/* encode */
T264_cabac_mb_mvd_cpn( t, i_list, i8, 0, mdx );
T264_cabac_mb_mvd_cpn( t, i_list, i8, 1, mdy );
/* save mvd value */
for(j=0; jmb.mvd_ref[i_list][i8+i][0] = mdx;
t->mb.mvd_ref[i_list][i8+i][1] = mdy;
t->mb.mvd[i_list][luma_idx+i][0] = mdx;
t->mb.mvd[i_list][luma_idx+i][1] = mdy;
}
i8 += 8;
luma_idx += 4;
}
}
static __inline void T264_cabac_mb8x8_mvd( T264_t *t, int i_list )
{
int i;
int sub_part;
for( i = 0; i < 4; i++ )
{
sub_part = t->mb.submb_part[luma_index[i<<2]];
if( T264_mb_partition_listX_table[sub_part-B_DIRECT_8x8][i_list] == 0 )
{
continue;
}
switch( sub_part )
{
case B_DIRECT_8x8:
assert(0);
break;
case B_L0_8x8:
case B_L1_8x8:
case B_Bi_8x8:
T264_cabac_mb_mvd( t, i_list, 4*i, 2, 2 );
break;
case B_L0_8x4:
case B_L1_8x4:
case B_Bi_8x4:
T264_cabac_mb_mvd( t, i_list, 4*i+0, 2, 1 );
T264_cabac_mb_mvd( t, i_list, 4*i+2, 2, 1 );
break;
case B_L0_4x8:
case B_L1_4x8:
case B_Bi_4x8:
T264_cabac_mb_mvd( t, i_list, 4*i+0, 1, 2 );
T264_cabac_mb_mvd( t, i_list, 4*i+1, 1, 2 );
break;
case B_L0_4x4:
case B_L1_4x4:
case B_Bi_4x4:
T264_cabac_mb_mvd( t, i_list, 4*i+0, 1, 1 );
T264_cabac_mb_mvd( t, i_list, 4*i+1, 1, 1 );
T264_cabac_mb_mvd( t, i_list, 4*i+2, 1, 1 );
T264_cabac_mb_mvd( t, i_list, 4*i+3, 1, 1 );
break;
}
}
}
static int T264_cabac_mb_cbf_ctxidxinc( T264_t *t, int i_cat, int i_idx )
{
/* TODO: clean up/optimize */
T264_mb_context_t *mb_ctxs = &(t->rec->mb[0]);
T264_mb_context_t *mb_ctx;
int i_mba_xy = -1;
int i_mbb_xy = -1;
int i_nza = -1;
int i_nzb = -1;
int ctx = 0;
int cbp;
if( i_cat == 0 )
{
if( t->mb.mb_x > 0 )
{
i_mba_xy = t->mb.mb_xy -1;
mb_ctx = &(mb_ctxs[i_mba_xy]);
if( mb_ctx->mb_mode == I_16x16 )
{
i_nza = (mb_ctx->cbp & 0x100);
}
}
if( t->mb.mb_y > 0 )
{
i_mbb_xy = t->mb.mb_xy - t->mb_stride;
mb_ctx = &(mb_ctxs[i_mbb_xy]);
if( mb_ctx->mb_mode == I_16x16 )
{
i_nzb = (mb_ctx->cbp & 0x100);
}
}
}
else if( i_cat == 1 || i_cat == 2 )
{
int x = luma_inverse_x[i_idx];
int y = luma_inverse_y[i_idx];
int i8 = T264_scan8[i_idx];
if( x > 0 )
i_mba_xy = t->mb.mb_xy;
else if( t->mb.mb_x > 0 )
i_mba_xy = t->mb.mb_xy -1;
if( y > 0 )
i_mbb_xy = t->mb.mb_xy;
else if( t->mb.mb_y > 0 )
i_mbb_xy = t->mb.mb_xy - t->mb_stride;
/* no need to test for skip/pcm */
if( i_mba_xy >= 0 )
{
const int i8x8a = block_idx_xy[(x-1)&0x03][y]/4;
if( (mb_ctxs[i_mba_xy].cbp_y&0x0f)>> i8x8a )
{
i_nza = t->mb.nnz_ref[i8-1];
}
}
if( i_mbb_xy >= 0 )
{
const int i8x8b = block_idx_xy[x][(y-1)&0x03]/4;
if( (mb_ctxs[i_mbb_xy].cbp_y&0x0f)>> i8x8b )
{
i_nzb = t->mb.nnz_ref[i8 - 8];
}
}
}
else if( i_cat == 3 )
{
/* no need to test skip/pcm */
if( t->mb.mb_x > 0 )
{
i_mba_xy = t->mb.mb_xy -1;
cbp = mb_ctxs[i_mba_xy].cbp;
if( cbp&0x30 )
{
i_nza = cbp&( 0x02 << ( 8 + i_idx) );
}
}
if( t->mb.mb_y > 0 )
{
i_mbb_xy = t->mb.mb_xy - t->mb_stride;
cbp = mb_ctxs[i_mbb_xy].cbp;
if( cbp&0x30 )
{
i_nzb = cbp&( 0x02 << ( 8 + i_idx) );
}
}
}
else if( i_cat == 4 )
{
int idxc = i_idx% 4;
if( idxc == 1 || idxc == 3 )
i_mba_xy = t->mb.mb_xy;
else if( t->mb.mb_x > 0 )
i_mba_xy = t->mb.mb_xy - 1;
if( idxc == 2 || idxc == 3 )
i_mbb_xy = t->mb.mb_xy;
else if( t->mb.mb_y > 0 )
i_mbb_xy = t->mb.mb_xy - t->mb_stride;
/* no need to test skip/pcm */
if( i_mba_xy >= 0 && (mb_ctxs[i_mba_xy].cbp&0x30) == 0x20 )
{
i_nza = t->mb.nnz_ref[T264_scan8[16+i_idx] - 1];
}
if( i_mbb_xy >= 0 && (mb_ctxs[i_mbb_xy].cbp&0x30) == 0x20 )
{
i_nzb = t->mb.nnz_ref[T264_scan8[16+i_idx] - 8];
}
}
if( ( i_mba_xy < 0 && IS_INTRA( t->mb.mb_mode ) ) || i_nza > 0 )
{
ctx++;
}
if( ( i_mbb_xy < 0 && IS_INTRA( t->mb.mb_mode ) ) || i_nzb > 0 )
{
ctx += 2;
}
return 4 * i_cat + ctx;
}
static void block_residual_write_cabac( T264_t *t, int i_ctxBlockCat, int i_idx, int16_t *l, int i_count )
{
static const int significant_coeff_flag_offset[5] = { 0, 15, 29, 44, 47 };
static const int last_significant_coeff_flag_offset[5] = { 0, 15, 29, 44, 47 };
static const int coeff_abs_level_m1_offset[5] = { 0, 10, 20, 30, 39 };
int i_coeff_abs_m1[16];
int i_coeff_sign[16];
int i_coeff = 0;
int i_last = 0;
int i_abslevel1 = 0;
int i_abslevelgt1 = 0;
int i;
/* i_ctxBlockCat: 0-> DC 16x16 i_idx = 0
* 1-> AC 16x16 i_idx = luma4x4idx
* 2-> Luma4x4 i_idx = luma4x4idx
* 3-> DC Chroma i_idx = iCbCr
* 4-> AC Chroma i_idx = 4 * iCbCr + chroma4x4idx
*/
//fprintf( stderr, "l[] = " );
for( i = 0; i < i_count; i++ )
{
//fprintf( stderr, "%d ", l[i] );
if( l[i] != 0 )
{
i_coeff_abs_m1[i_coeff] = abs( l[i] ) - 1;
i_coeff_sign[i_coeff] = ( l[i] < 0 ? 1 : 0);
i_coeff++;
i_last = i;
}
}
//fprintf( stderr, "\n" );
if( i_coeff == 0 )
{
/* codec block flag */
T264_cabac_encode_decision( &t->cabac, 85 + T264_cabac_mb_cbf_ctxidxinc( t, i_ctxBlockCat, i_idx ), 0 );
return;
}
/* block coded */
T264_cabac_encode_decision( &t->cabac, 85 + T264_cabac_mb_cbf_ctxidxinc( t, i_ctxBlockCat, i_idx ), 1 );
for( i = 0; i < i_count - 1; i++ )
{
int i_ctxIdxInc;
i_ctxIdxInc = T264_MIN( i, i_count - 2 );
if( l[i] != 0 )
{
T264_cabac_encode_decision( &t->cabac, 105 + significant_coeff_flag_offset[i_ctxBlockCat] + i_ctxIdxInc, 1 );
T264_cabac_encode_decision( &t->cabac, 166 + last_significant_coeff_flag_offset[i_ctxBlockCat] + i_ctxIdxInc, i == i_last ? 1 : 0 );
}
else
{
T264_cabac_encode_decision( &t->cabac, 105 + significant_coeff_flag_offset[i_ctxBlockCat] + i_ctxIdxInc, 0 );
}
if( i == i_last )
{
break;
}
}
for( i = i_coeff - 1; i >= 0; i-- )
{
int i_prefix;
int i_ctxIdxInc;
/* write coeff_abs - 1 */
/* prefix */
i_prefix = T264_MIN( i_coeff_abs_m1[i], 14 );
i_ctxIdxInc = (i_abslevelgt1 != 0 ? 0 : T264_MIN( 4, i_abslevel1 + 1 )) + coeff_abs_level_m1_offset[i_ctxBlockCat];
if( i_prefix == 0 )
{
T264_cabac_encode_decision( &t->cabac, 227 + i_ctxIdxInc, 0 );
}
else
{
int j;
T264_cabac_encode_decision( &t->cabac, 227 + i_ctxIdxInc, 1 );
i_ctxIdxInc = 5 + T264_MIN( 4, i_abslevelgt1 ) + coeff_abs_level_m1_offset[i_ctxBlockCat];
for( j = 0; j < i_prefix - 1; j++ )
{
T264_cabac_encode_decision( &t->cabac, 227 + i_ctxIdxInc, 1 );
}
if( i_prefix < 14 )
{
T264_cabac_encode_decision( &t->cabac, 227 + i_ctxIdxInc, 0 );
}
}
/* suffix */
if( i_coeff_abs_m1[i] >= 14 )
{
int k = 0;
int i_suffix = i_coeff_abs_m1[i] - 14;
while( i_suffix >= (1<cabac, 1 );
i_suffix -= 1 << k;
k++;
}
T264_cabac_encode_bypass( &t->cabac, 0 );
while( k-- )
{
T264_cabac_encode_bypass( &t->cabac, (i_suffix >> k)&0x01 );
}
}
/* write sign */
T264_cabac_encode_bypass( &t->cabac, i_coeff_sign[i] );
if( i_coeff_abs_m1[i] == 0 )
{
i_abslevel1++;
}
else
{
i_abslevelgt1++;
}
}
}
static int8_t
T264_mb_predict_intra4x4_mode(T264_t *t, int32_t idx)
{
int32_t x, y;
int8_t nA, nB, pred_blk;
x = luma_inverse_x[idx];
y = luma_inverse_y[idx];
nA = t->mb.i4x4_pred_mode_ref[IPM_LUMA + x + y * 8 - 1];
nB = t->mb.i4x4_pred_mode_ref[IPM_LUMA + x + y * 8 - 8];
pred_blk = T264_MIN(nA, nB);
if( pred_blk < 0 )
return Intra_4x4_DC;
return pred_blk;
}
void T264_macroblock_write_cabac( T264_t *t, bs_t *s )
{
const int i_mb_type = t->mb.mb_mode;
const int i_mb_pos_start = BitstreamPos( s );
int i_mb_pos_tex;
int i;
/* Write the MB type */
T264_cabac_mb_type( t );
/* PCM special block type UNTESTED */
/* no PCM here*/
if( IS_INTRA( i_mb_type ) )
{
/* Prediction */
if( i_mb_type == I_4x4 )
{
for( i = 0; i < 16; i++ )
{
const int i_pred = T264_mb_predict_intra4x4_mode( t, i );
const int i_mode = t->mb.i4x4_pred_mode_ref[T264_scan8[i]];
T264_cabac_mb_intra4x4_pred_mode( t, i_pred, i_mode );
}
}
T264_cabac_mb_intra8x8_pred_mode( t );
}
else if( i_mb_type == P_MODE )
{
if( t->mb.mb_part == MB_16x16 )
{
if( t->ps.num_ref_idx_l0_active_minus1 > 0 )
{
T264_cabac_mb_ref( t, 0, 0 );
}
T264_cabac_mb_mvd( t, 0, 0, 4, 4 );
}
else if( t->mb.mb_part == MB_16x8 )
{
if( t->ps.num_ref_idx_l0_active_minus1 > 0 )
{
T264_cabac_mb_ref( t, 0, 0 );
T264_cabac_mb_ref( t, 0, 8 );
}
T264_cabac_mb_mvd( t, 0, 0, 4, 2 );
T264_cabac_mb_mvd( t, 0, 8, 4, 2 );
}
else if( t->mb.mb_part == MB_8x16 )
{
if( t->ps.num_ref_idx_l0_active_minus1 > 0 )
{
T264_cabac_mb_ref( t, 0, 0 );
T264_cabac_mb_ref( t, 0, 4 );
}
T264_cabac_mb_mvd( t, 0, 0, 2, 4 );
T264_cabac_mb_mvd( t, 0, 4, 2, 4 );
}
else /* 8x8 */
{
/* sub mb type */
T264_cabac_mb_sub_p_partition( t, t->mb.submb_part[0] );
T264_cabac_mb_sub_p_partition( t, t->mb.submb_part[2] );
T264_cabac_mb_sub_p_partition( t, t->mb.submb_part[8] );
T264_cabac_mb_sub_p_partition( t, t->mb.submb_part[10] );
/* ref 0 */
if( t->ps.num_ref_idx_l0_active_minus1 > 0 )
{
T264_cabac_mb_ref( t, 0, 0 );
T264_cabac_mb_ref( t, 0, 4 );
T264_cabac_mb_ref( t, 0, 8 );
T264_cabac_mb_ref( t, 0, 12 );
}
for( i = 0; i < 4; i++ )
{
switch( t->mb.submb_part[luma_index[i<<2]] )
{
case MB_8x8:
T264_cabac_mb_mvd( t, 0, 4*i, 2, 2 );
break;
case MB_8x4:
T264_cabac_mb_mvd( t, 0, 4*i+0, 2, 1 );
T264_cabac_mb_mvd( t, 0, 4*i+2, 2, 1 );
break;
case MB_4x8:
T264_cabac_mb_mvd( t, 0, 4*i+0, 1, 2 );
T264_cabac_mb_mvd( t, 0, 4*i+1, 1, 2 );
break;
case MB_4x4:
T264_cabac_mb_mvd( t, 0, 4*i+0, 1, 1 );
T264_cabac_mb_mvd( t, 0, 4*i+1, 1, 1 );
T264_cabac_mb_mvd( t, 0, 4*i+2, 1, 1 );
T264_cabac_mb_mvd( t, 0, 4*i+3, 1, 1 );
break;
}
}
}
}
else if( i_mb_type == B_MODE )
{
if((t->mb.mb_part==MB_16x16&&t->mb.is_copy!=1) || (t->mb.mb_part==MB_16x8) || (t->mb.mb_part==MB_8x16))
{
/* to be changed here*/
/* All B mode */
int i_list;
int b_list[2][2];
const int i_partition = t->mb.mb_part;
int b_part_mode, part_mode0, part_mode1;
static const int b_part_mode_map[3][3] = {
{ B_L0_L0, B_L0_L1, B_L0_BI },
{ B_L1_L0, B_L1_L1, B_L1_BI },
{ B_BI_L0, B_BI_L1, B_BI_BI }
};
switch(t->mb.mb_part)
{
case MB_16x16:
part_mode0 = t->mb.mb_part2[0] - B_L0_16x16;
b_part_mode = b_part_mode_map[part_mode0][part_mode0];
break;
case MB_16x8:
part_mode0 = t->mb.mb_part2[0] - B_L0_16x8;
part_mode1 = t->mb.mb_part2[1] - B_L0_16x8;
b_part_mode = b_part_mode_map[part_mode0][part_mode1];
break;
case MB_8x16:
part_mode0 = t->mb.mb_part2[0] - B_L0_8x16;
part_mode1 = t->mb.mb_part2[1] - B_L0_8x16;
b_part_mode = b_part_mode_map[part_mode0][part_mode1];
break;
}
/* init ref list utilisations */
for( i = 0; i < 2; i++ )
{
b_list[0][i] = T264_mb_type_list0_table[b_part_mode][i];
b_list[1][i] = T264_mb_type_list1_table[b_part_mode][i];
}
for( i_list = 0; i_list < 2; i_list++ )
{
const int i_ref_max = i_list == 0 ? t->ps.num_ref_idx_l0_active_minus1+1 : t->ps.num_ref_idx_l1_active_minus1+1;
if( i_ref_max > 1 )
{
if( t->mb.mb_part == MB_16x16 )
{
if( b_list[i_list][0] ) T264_cabac_mb_ref( t, i_list, 0 );
}
else if( t->mb.mb_part == MB_16x8 )
{
if( b_list[i_list][0] ) T264_cabac_mb_ref( t, i_list, 0 );
if( b_list[i_list][1] ) T264_cabac_mb_ref( t, i_list, 8 );
}
else if( t->mb.mb_part == MB_8x16 )
{
if( b_list[i_list][0] ) T264_cabac_mb_ref( t, i_list, 0 );
if( b_list[i_list][1] ) T264_cabac_mb_ref( t, i_list, 4 );
}
}
}
for( i_list = 0; i_list < 2; i_list++ )
{
if( t->mb.mb_part == MB_16x16 )
{
if( b_list[i_list][0] ) T264_cabac_mb_mvd( t, i_list, 0, 4, 4 );
}
else if( t->mb.mb_part == MB_16x8 )
{
if( b_list[i_list][0] ) T264_cabac_mb_mvd( t, i_list, 0, 4, 2 );
if( b_list[i_list][1] ) T264_cabac_mb_mvd( t, i_list, 8, 4, 2 );
}
else if( t->mb.mb_part == MB_8x16 )
{
if( b_list[i_list][0] ) T264_cabac_mb_mvd( t, i_list, 0, 2, 4 );
if( b_list[i_list][1] ) T264_cabac_mb_mvd( t, i_list, 4, 2, 4 );
}
}
}
else if(t->mb.mb_part==MB_16x16 && t->mb.is_copy)
{
}
else /* B8x8 */
{
/* TODO */
int i_list;
/* sub mb type */
T264_cabac_mb_sub_b_partition( t, t->mb.submb_part[0] );
T264_cabac_mb_sub_b_partition( t, t->mb.submb_part[2] );
T264_cabac_mb_sub_b_partition( t, t->mb.submb_part[8] );
T264_cabac_mb_sub_b_partition( t, t->mb.submb_part[10] );
/* ref */
for( i_list = 0; i_list < 2; i_list++ )
{
if( ( i_list ? t->ps.num_ref_idx_l1_active_minus1 : t->ps.num_ref_idx_l0_active_minus1 ) == 0 )
continue;
for( i = 0; i < 4; i++ )
{
int sub_part = t->mb.submb_part[luma_index[i<<2]]-B_DIRECT_8x8;
if( T264_mb_partition_listX_table[sub_part][i_list] == 1 )
{
T264_cabac_mb_ref( t, i_list, 4*i );
}
}
}
T264_cabac_mb8x8_mvd( t, 0 );
T264_cabac_mb8x8_mvd( t, 1 );
}
}
i_mb_pos_tex = BitstreamPos( s );
if( i_mb_type != I_16x16 )
{
T264_cabac_mb_cbp_luma( t );
T264_cabac_mb_cbp_chroma( t );
}
if( t->mb.cbp_y > 0 || t->mb.cbp_c > 0 || i_mb_type == I_16x16 )
{
T264_cabac_mb_qp_delta( t );
/* write residual */
if( i_mb_type == I_16x16 )
{
/* DC Luma */
block_residual_write_cabac( t, 0, 0, t->mb.dc4x4_z, 16 );
if( t->mb.cbp_y != 0 )
{
/* AC Luma */
for( i = 0; i < 16; i++ )
{
block_residual_write_cabac( t, 1, i, &(t->mb.dct_y_z[i][1]), 15 );
}
}
}
else
{
if(t->frame_num == 1)
t->frame_num = 1;
for( i = 0; i < 16; i++ )
{
if( t->mb.cbp_y & ( 1 << ( i / 4 ) ) )
{
block_residual_write_cabac( t, 2, i, &(t->mb.dct_y_z[i][0]), 16 );
}
}
}
if( t->mb.cbp_c&0x03 ) /* Chroma DC residual present */
{
block_residual_write_cabac( t, 3, 0, &(t->mb.dc2x2_z[0][0]), 4 );
block_residual_write_cabac( t, 3, 1, &(t->mb.dc2x2_z[1][0]), 4 );
}
if( t->mb.cbp_c&0x02 ) /* Chroma AC residual present */
{
for( i = 0; i < 8; i++ )
{
block_residual_write_cabac( t, 4, i, &(t->mb.dct_uv_z[i>>2][i&0x03][1]), 15);
}
}
}
/*
if( IS_INTRA( i_mb_type ) )
t->stat.frame.i_itex_bits += bs_pos(s) - i_mb_pos_tex;
else
t->stat.frame.i_ptex_bits += bs_pos(s) - i_mb_pos_tex;
*/
}