macroblock.c
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Audio
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Visual C++
- /*****************************************************************************
- * macroblock.c: h264 encoder library
- *****************************************************************************
- * Copyright (C) 2003 Laurent Aimar
- * $Id: macroblock.c,v 1.1 2004/06/03 19:27:08 fenrir Exp $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- *
- * 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.
- *****************************************************************************/
- #include <stdio.h>
- #include <string.h>
- #include "common/common.h"
- #include "macroblock.h"
- /* def_quant4_mf only for probe_skip; actual encoding uses matrices from set.c */
- /* FIXME this seems to make better decisions with cqm=jvt, but could screw up
- * with general custom matrices. */
- static const int def_quant4_mf[6][4][4] =
- {
- { { 13107, 8066, 13107, 8066 }, { 8066, 5243, 8066, 5243 },
- { 13107, 8066, 13107, 8066 }, { 8066, 5243, 8066, 5243 } },
- { { 11916, 7490, 11916, 7490 }, { 7490, 4660, 7490, 4660 },
- { 11916, 7490, 11916, 7490 }, { 7490, 4660, 7490, 4660 } },
- { { 10082, 6554, 10082, 6554 }, { 6554, 4194, 6554, 4194 },
- { 10082, 6554, 10082, 6554 }, { 6554, 4194, 6554, 4194 } },
- { { 9362, 5825, 9362, 5825 }, { 5825, 3647, 5825, 3647 },
- { 9362, 5825, 9362, 5825 }, { 5825, 3647, 5825, 3647 } },
- { { 8192, 5243, 8192, 5243 }, { 5243, 3355, 5243, 3355 },
- { 8192, 5243, 8192, 5243 }, { 5243, 3355, 5243, 3355 } },
- { { 7282, 4559, 7282, 4559 }, { 4559, 2893, 4559, 2893 },
- { 7282, 4559, 7282, 4559 }, { 4559, 2893, 4559, 2893 } }
- };
- /****************************************************************************
- * Scan and Quant functions
- ****************************************************************************/
- //static const int scan_zigzag_x[16]={0, 1, 0, 0, 1, 2, 3, 2, 1, 0, 1, 2, 3, 3, 2, 3};
- //static const int scan_zigzag_y[16]={0, 0, 1, 2, 1, 0, 0, 1, 2, 3, 3, 2, 1, 2, 3, 3};
- #define ZIG(i,y,x) level[i] = dct[y][x];
- static inline void scan_zigzag_8x8full( int level[64], int16_t dct[8][8] )
- {
- ZIG( 0,0,0) ZIG( 1,0,1) ZIG( 2,1,0) ZIG( 3,2,0)
- ZIG( 4,1,1) ZIG( 5,0,2) ZIG( 6,0,3) ZIG( 7,1,2)
- ZIG( 8,2,1) ZIG( 9,3,0) ZIG(10,4,0) ZIG(11,3,1)
- ZIG(12,2,2) ZIG(13,1,3) ZIG(14,0,4) ZIG(15,0,5)
- ZIG(16,1,4) ZIG(17,2,3) ZIG(18,3,2) ZIG(19,4,1)
- ZIG(20,5,0) ZIG(21,6,0) ZIG(22,5,1) ZIG(23,4,2)
- ZIG(24,3,3) ZIG(25,2,4) ZIG(26,1,5) ZIG(27,0,6)
- ZIG(28,0,7) ZIG(29,1,6) ZIG(30,2,5) ZIG(31,3,4)
- ZIG(32,4,3) ZIG(33,5,2) ZIG(34,6,1) ZIG(35,7,0)
- ZIG(36,7,1) ZIG(37,6,2) ZIG(38,5,3) ZIG(39,4,4)
- ZIG(40,3,5) ZIG(41,2,6) ZIG(42,1,7) ZIG(43,2,7)
- ZIG(44,3,6) ZIG(45,4,5) ZIG(46,5,4) ZIG(47,6,3)
- ZIG(48,7,2) ZIG(49,7,3) ZIG(50,6,4) ZIG(51,5,5)
- ZIG(52,4,6) ZIG(53,3,7) ZIG(54,4,7) ZIG(55,5,6)
- ZIG(56,6,5) ZIG(57,7,4) ZIG(58,7,5) ZIG(59,6,6)
- ZIG(60,5,7) ZIG(61,6,7) ZIG(62,7,6) ZIG(63,7,7)
- }
- static inline void scan_zigzag_4x4full( int level[16], int16_t dct[4][4] )
- {
- ZIG( 0,0,0) ZIG( 1,0,1) ZIG( 2,1,0) ZIG( 3,2,0)
- ZIG( 4,1,1) ZIG( 5,0,2) ZIG( 6,0,3) ZIG( 7,1,2)
- ZIG( 8,2,1) ZIG( 9,3,0) ZIG(10,3,1) ZIG(11,2,2)
- ZIG(12,1,3) ZIG(13,2,3) ZIG(14,3,2) ZIG(15,3,3)
- }
- static inline void scan_zigzag_4x4( int level[15], int16_t dct[4][4] )
- {
- ZIG( 0,0,1) ZIG( 1,1,0) ZIG( 2,2,0)
- ZIG( 3,1,1) ZIG( 4,0,2) ZIG( 5,0,3) ZIG( 6,1,2)
- ZIG( 7,2,1) ZIG( 8,3,0) ZIG( 9,3,1) ZIG(10,2,2)
- ZIG(11,1,3) ZIG(12,2,3) ZIG(13,3,2) ZIG(14,3,3)
- }
- static inline void scan_zigzag_2x2_dc( int level[4], int16_t dct[2][2] )
- {
- ZIG(0,0,0)
- ZIG(1,0,1)
- ZIG(2,1,0)
- ZIG(3,1,1)
- }
- #undef ZIG
- #define ZIG(i,y,x) {
- int oe = x+y*FENC_STRIDE;
- int od = x+y*FDEC_STRIDE;
- level[i] = p_src[oe] - p_dst[od];
- p_dst[od] = p_src[oe];
- }
- static inline void sub_zigzag_4x4full( int level[16], const uint8_t *p_src, uint8_t *p_dst )
- {
- ZIG( 0,0,0) ZIG( 1,0,1) ZIG( 2,1,0) ZIG( 3,2,0)
- ZIG( 4,1,1) ZIG( 5,0,2) ZIG( 6,0,3) ZIG( 7,1,2)
- ZIG( 8,2,1) ZIG( 9,3,0) ZIG(10,3,1) ZIG(11,2,2)
- ZIG(12,1,3) ZIG(13,2,3) ZIG(14,3,2) ZIG(15,3,3)
- }
- static inline void sub_zigzag_4x4( int level[15], const uint8_t *p_src, uint8_t *p_dst )
- {
- ZIG( 0,0,1) ZIG( 1,1,0) ZIG( 2,2,0)
- ZIG( 3,1,1) ZIG( 4,0,2) ZIG( 5,0,3) ZIG( 6,1,2)
- ZIG( 7,2,1) ZIG( 8,3,0) ZIG( 9,3,1) ZIG(10,2,2)
- ZIG(11,1,3) ZIG(12,2,3) ZIG(13,3,2) ZIG(14,3,3)
- }
- #undef ZIG
- static void quant_8x8( x264_t *h, int16_t dct[8][8], int quant_mf[6][8][8], int i_qscale, int b_intra )
- {
- const int i_qbits = 16 + i_qscale / 6;
- const int i_mf = i_qscale % 6;
- const int f = ( 1 << i_qbits ) / ( b_intra ? 3 : 6 );
- h->quantf.quant_8x8_core( dct, quant_mf[i_mf], i_qbits, f );
- }
- static void quant_4x4( x264_t *h, int16_t dct[4][4], int quant_mf[6][4][4], int i_qscale, int b_intra )
- {
- const int i_qbits = 15 + i_qscale / 6;
- const int i_mf = i_qscale % 6;
- const int f = ( 1 << i_qbits ) / ( b_intra ? 3 : 6 );
- h->quantf.quant_4x4_core( dct, quant_mf[i_mf], i_qbits, f );
- }
- static void quant_4x4_dc( x264_t *h, int16_t dct[4][4], int quant_mf[6][4][4], int i_qscale )
- {
- const int i_qbits = 16 + i_qscale / 6;
- const int i_mf = i_qscale % 6;
- const int f = ( 1 << i_qbits ) / 3;
- h->quantf.quant_4x4_dc_core( dct, quant_mf[i_mf][0][0], i_qbits, f );
- }
- static void quant_2x2_dc( x264_t *h, int16_t dct[2][2], int quant_mf[6][4][4], int i_qscale, int b_intra )
- {
- const int i_qbits = 16 + i_qscale / 6;
- const int i_mf = i_qscale % 6;
- const int f = ( 1 << i_qbits ) / ( b_intra ? 3 : 6 );
- h->quantf.quant_2x2_dc_core( dct, quant_mf[i_mf][0][0], i_qbits, f );
- }
- /* (ref: JVT-B118)
- * x264_mb_decimate_score: given dct coeffs it returns a score to see if we could empty this dct coeffs
- * to 0 (low score means set it to null)
- * Used in inter macroblock (luma and chroma)
- * luma: for a 8x8 block: if score < 4 -> null
- * for the complete mb: if score < 6 -> null
- * chroma: for the complete mb: if score < 7 -> null
- */
- static int x264_mb_decimate_score( int *dct, int i_max )
- {
- static const int i_ds_table4[16] = {
- 3,2,2,1,1,1,0,0,0,0,0,0,0,0,0,0 };
- static const int i_ds_table8[64] = {
- 3,3,3,3,2,2,2,2,2,2,2,2,1,1,1,1,
- 1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
- const int *ds_table = (i_max == 64) ? i_ds_table8 : i_ds_table4;
- int i_score = 0;
- int idx = i_max - 1;
- while( idx >= 0 && dct[idx] == 0 )
- idx--;
- while( idx >= 0 )
- {
- int i_run;
- if( abs( dct[idx--] ) > 1 )
- return 9;
- i_run = 0;
- while( idx >= 0 && dct[idx] == 0 )
- {
- idx--;
- i_run++;
- }
- i_score += ds_table[i_run];
- }
- return i_score;
- }
- void x264_mb_encode_i4x4( x264_t *h, int idx, int i_qscale )
- {
- int x = 4 * block_idx_x[idx];
- int y = 4 * block_idx_y[idx];
- uint8_t *p_src = &h->mb.pic.p_fenc[0][x+y*FENC_STRIDE];
- uint8_t *p_dst = &h->mb.pic.p_fdec[0][x+y*FDEC_STRIDE];
- int16_t dct4x4[4][4];
- if( h->mb.b_lossless )
- {
- sub_zigzag_4x4full( h->dct.block[idx].luma4x4, p_src, p_dst );
- return;
- }
- h->dctf.sub4x4_dct( dct4x4, p_src, FENC_STRIDE, p_dst, FDEC_STRIDE );
- if( h->mb.b_trellis )
- x264_quant_4x4_trellis( h, dct4x4, CQM_4IY, i_qscale, DCT_LUMA_4x4, 1 );
- else
- quant_4x4( h, dct4x4, h->quant4_mf[CQM_4IY], i_qscale, 1 );
- scan_zigzag_4x4full( h->dct.block[idx].luma4x4, dct4x4 );
- h->quantf.dequant_4x4( dct4x4, h->dequant4_mf[CQM_4IY], i_qscale );
- /* output samples to fdec */
- h->dctf.add4x4_idct( p_dst, FDEC_STRIDE, dct4x4 );
- }
- void x264_mb_encode_i8x8( x264_t *h, int idx, int i_qscale )
- {
- int x = 8 * (idx&1);
- int y = 8 * (idx>>1);
- uint8_t *p_src = &h->mb.pic.p_fenc[0][x+y*FENC_STRIDE];
- uint8_t *p_dst = &h->mb.pic.p_fdec[0][x+y*FDEC_STRIDE];
- int16_t dct8x8[8][8];
- h->dctf.sub8x8_dct8( dct8x8, p_src, FENC_STRIDE, p_dst, FDEC_STRIDE );
- if( h->mb.b_trellis )
- x264_quant_8x8_trellis( h, dct8x8, CQM_8IY, i_qscale, 1 );
- else
- quant_8x8( h, dct8x8, h->quant8_mf[CQM_8IY], i_qscale, 1 );
- scan_zigzag_8x8full( h->dct.luma8x8[idx], dct8x8 );
- h->quantf.dequant_8x8( dct8x8, h->dequant8_mf[CQM_8IY], i_qscale );
- h->dctf.add8x8_idct8( p_dst, FDEC_STRIDE, dct8x8 );
- }
- static void x264_mb_encode_i16x16( x264_t *h, int i_qscale )
- {
- uint8_t *p_src = h->mb.pic.p_fenc[0];
- uint8_t *p_dst = h->mb.pic.p_fdec[0];
- int16_t dct4x4[16+1][4][4];
- int i;
- if( h->mb.b_lossless )
- {
- for( i = 0; i < 16; i++ )
- {
- int oe = block_idx_x[i]*4 + block_idx_y[i]*4*FENC_STRIDE;
- int od = block_idx_x[i]*4 + block_idx_y[i]*4*FDEC_STRIDE;
- sub_zigzag_4x4( h->dct.block[i].residual_ac, p_src+oe, p_dst+od );
- dct4x4[0][block_idx_y[i]][block_idx_x[i]] = p_src[oe] - p_dst[od];
- p_dst[od] = p_src[oe];
- }
- scan_zigzag_4x4full( h->dct.luma16x16_dc, dct4x4[0] );
- return;
- }
- h->dctf.sub16x16_dct( &dct4x4[1], p_src, FENC_STRIDE, p_dst, FDEC_STRIDE );
- for( i = 0; i < 16; i++ )
- {
- /* copy dc coeff */
- dct4x4[0][block_idx_y[i]][block_idx_x[i]] = dct4x4[1+i][0][0];
- /* quant/scan/dequant */
- if( h->mb.b_trellis )
- x264_quant_4x4_trellis( h, dct4x4[1+i], CQM_4IY, i_qscale, DCT_LUMA_AC, 1 );
- else
- quant_4x4( h, dct4x4[1+i], h->quant4_mf[CQM_4IY], i_qscale, 1 );
- scan_zigzag_4x4( h->dct.block[i].residual_ac, dct4x4[1+i] );
- h->quantf.dequant_4x4( dct4x4[1+i], h->dequant4_mf[CQM_4IY], i_qscale );
- }
- h->dctf.dct4x4dc( dct4x4[0] );
- quant_4x4_dc( h, dct4x4[0], h->quant4_mf[CQM_4IY], i_qscale );
- scan_zigzag_4x4full( h->dct.luma16x16_dc, dct4x4[0] );
- /* output samples to fdec */
- h->dctf.idct4x4dc( dct4x4[0] );
- x264_mb_dequant_4x4_dc( dct4x4[0], h->dequant4_mf[CQM_4IY], i_qscale ); /* XXX not inversed */
- /* calculate dct coeffs */
- for( i = 0; i < 16; i++ )
- {
- /* copy dc coeff */
- dct4x4[1+i][0][0] = dct4x4[0][block_idx_y[i]][block_idx_x[i]];
- }
- /* put pixels to fdec */
- h->dctf.add16x16_idct( p_dst, FDEC_STRIDE, &dct4x4[1] );
- }
- static void x264_mb_encode_8x8_chroma( x264_t *h, int b_inter, int i_qscale )
- {
- int i, ch;
- for( ch = 0; ch < 2; ch++ )
- {
- uint8_t *p_src = h->mb.pic.p_fenc[1+ch];
- uint8_t *p_dst = h->mb.pic.p_fdec[1+ch];
- int i_decimate_score = 0;
- int16_t dct2x2[2][2];
- int16_t dct4x4[4][4][4];
- if( h->mb.b_lossless )
- {
- for( i = 0; i < 4; i++ )
- {
- int oe = block_idx_x[i]*4 + block_idx_y[i]*4*FENC_STRIDE;
- int od = block_idx_x[i]*4 + block_idx_y[i]*4*FDEC_STRIDE;
- sub_zigzag_4x4( h->dct.block[16+i+ch*4].residual_ac, p_src+oe, p_dst+od );
- h->dct.chroma_dc[ch][i] = p_src[oe] - p_dst[od];
- p_dst[od] = p_src[oe];
- }
- continue;
- }
- h->dctf.sub8x8_dct( dct4x4, p_src, FENC_STRIDE, p_dst, FDEC_STRIDE );
- /* calculate dct coeffs */
- for( i = 0; i < 4; i++ )
- {
- /* copy dc coeff */
- dct2x2[block_idx_y[i]][block_idx_x[i]] = dct4x4[i][0][0];
- /* no trellis; it doesn't seem to help chroma noticeably */
- quant_4x4( h, dct4x4[i], h->quant4_mf[CQM_4IC + b_inter], i_qscale, !b_inter );
- scan_zigzag_4x4( h->dct.block[16+i+ch*4].residual_ac, dct4x4[i] );
- if( b_inter )
- {
- i_decimate_score += x264_mb_decimate_score( h->dct.block[16+i+ch*4].residual_ac, 15 );
- }
- }
- h->dctf.dct2x2dc( dct2x2 );
- quant_2x2_dc( h, dct2x2, h->quant4_mf[CQM_4IC + b_inter], i_qscale, !b_inter );
- scan_zigzag_2x2_dc( h->dct.chroma_dc[ch], dct2x2 );
- /* output samples to fdec */
- h->dctf.idct2x2dc( dct2x2 );
- x264_mb_dequant_2x2_dc( dct2x2, h->dequant4_mf[CQM_4IC + b_inter], i_qscale ); /* XXX not inversed */
- if( b_inter && i_decimate_score < 7 )
- {
- /* Near null chroma 8x8 block so make it null (bits saving) */
- memset( dct4x4, 0, sizeof( dct4x4 ) );
- memset( &h->dct.block[16+ch*4], 0, 4 * sizeof( *h->dct.block ) );
- }
- else
- {
- for( i = 0; i < 4; i++ )
- h->quantf.dequant_4x4( dct4x4[i], h->dequant4_mf[CQM_4IC + b_inter], i_qscale );
- }
- /* calculate dct coeffs */
- for( i = 0; i < 4; i++ )
- {
- /* copy dc coeff */
- dct4x4[i][0][0] = dct2x2[0][i];
- }
- h->dctf.add8x8_idct( p_dst, FDEC_STRIDE, dct4x4 );
- }
- }
- static void x264_macroblock_encode_skip( x264_t *h )
- {
- int i;
- h->mb.i_cbp_luma = 0x00;
- h->mb.i_cbp_chroma = 0x00;
- for( i = 0; i < 16+8; i++ )
- {
- h->mb.cache.non_zero_count[x264_scan8[i]] = 0;
- }
- /* store cbp */
- h->mb.cbp[h->mb.i_mb_xy] = 0;
- }
- /*****************************************************************************
- * x264_macroblock_encode_pskip:
- * Encode an already marked skip block
- *****************************************************************************/
- void x264_macroblock_encode_pskip( x264_t *h )
- {
- const int mvx = x264_clip3( h->mb.cache.mv[0][x264_scan8[0]][0],
- h->mb.mv_min[0], h->mb.mv_max[0] );
- const int mvy = x264_clip3( h->mb.cache.mv[0][x264_scan8[0]][1],
- h->mb.mv_min[1], h->mb.mv_max[1] );
- /* Motion compensation XXX probably unneeded */
- h->mc.mc_luma( h->mb.pic.p_fref[0][0], h->mb.pic.i_stride[0],
- h->mb.pic.p_fdec[0], FDEC_STRIDE,
- mvx, mvy, 16, 16 );
- /* Chroma MC */
- h->mc.mc_chroma( h->mb.pic.p_fref[0][0][4], h->mb.pic.i_stride[1],
- h->mb.pic.p_fdec[1], FDEC_STRIDE,
- mvx, mvy, 8, 8 );
- h->mc.mc_chroma( h->mb.pic.p_fref[0][0][5], h->mb.pic.i_stride[2],
- h->mb.pic.p_fdec[2], FDEC_STRIDE,
- mvx, mvy, 8, 8 );
- x264_macroblock_encode_skip( h );
- }
- /*****************************************************************************
- * x264_macroblock_encode:
- *****************************************************************************/
- void x264_macroblock_encode( x264_t *h )
- {
- int i_cbp_dc = 0;
- int i_qp = h->mb.i_qp;
- int i;
- if( h->mb.i_type == P_SKIP )
- {
- /* A bit special */
- x264_macroblock_encode_pskip( h );
- return;
- }
- if( h->mb.i_type == B_SKIP )
- {
- /* XXX motion compensation is probably unneeded */
- x264_mb_mc( h );
- x264_macroblock_encode_skip( h );
- return;
- }
- if( h->mb.i_type == I_16x16 )
- {
- const int i_mode = h->mb.i_intra16x16_pred_mode;
- h->mb.b_transform_8x8 = 0;
- /* do the right prediction */
- h->predict_16x16[i_mode]( h->mb.pic.p_fdec[0] );
- /* encode the 16x16 macroblock */
- x264_mb_encode_i16x16( h, i_qp );
- }
- else if( h->mb.i_type == I_8x8 )
- {
- h->mb.b_transform_8x8 = 1;
- for( i = 0; i < 4; i++ )
- {
- uint8_t *p_dst = &h->mb.pic.p_fdec[0][8 * (i&1) + 8 * (i>>1) * FDEC_STRIDE];
- int i_mode = h->mb.cache.intra4x4_pred_mode[x264_scan8[4*i]];
- h->predict_8x8[i_mode]( p_dst, h->mb.i_neighbour8[i] );
- x264_mb_encode_i8x8( h, i, i_qp );
- }
- }
- else if( h->mb.i_type == I_4x4 )
- {
- h->mb.b_transform_8x8 = 0;
- for( i = 0; i < 16; i++ )
- {
- uint8_t *p_dst = &h->mb.pic.p_fdec[0][4 * block_idx_x[i] + 4 * block_idx_y[i] * FDEC_STRIDE];
- int i_mode = h->mb.cache.intra4x4_pred_mode[x264_scan8[i]];
- if( (h->mb.i_neighbour4[i] & (MB_TOPRIGHT|MB_TOP)) == MB_TOP )
- /* emulate missing topright samples */
- *(uint32_t*) &p_dst[4-FDEC_STRIDE] = p_dst[3-FDEC_STRIDE] * 0x01010101U;
- h->predict_4x4[i_mode]( p_dst );
- x264_mb_encode_i4x4( h, i, i_qp );
- }
- }
- else /* Inter MB */
- {
- int i8x8, i4x4, idx;
- int i_decimate_mb = 0;
- /* Motion compensation */
- x264_mb_mc( h );
- if( h->mb.b_lossless )
- {
- for( i4x4 = 0; i4x4 < 16; i4x4++ )
- {
- int x = 4*block_idx_x[i4x4];
- int y = 4*block_idx_y[i4x4];
- sub_zigzag_4x4full( h->dct.block[i4x4].luma4x4,
- h->mb.pic.p_fenc[0]+x+y*FENC_STRIDE,
- h->mb.pic.p_fdec[0]+x+y*FDEC_STRIDE );
- }
- }
- else if( h->mb.b_transform_8x8 )
- {
- int16_t dct8x8[4][8][8];
- int nnz8x8[4] = {1,1,1,1};
- h->dctf.sub16x16_dct8( dct8x8,
- h->mb.pic.p_fenc[0], FENC_STRIDE,
- h->mb.pic.p_fdec[0], FDEC_STRIDE );
- for( idx = 0; idx < 4; idx++ )
- {
- if( h->mb.b_noise_reduction )
- x264_denoise_dct( h, (int16_t*)dct8x8[idx] );
- if( h->mb.b_trellis )
- x264_quant_8x8_trellis( h, dct8x8[idx], CQM_8PY, i_qp, 0 );
- else
- quant_8x8( h, dct8x8[idx], h->quant8_mf[CQM_8PY], i_qp, 0 );
- scan_zigzag_8x8full( h->dct.luma8x8[idx], dct8x8[idx] );
- if( !h->mb.b_trellis )
- {
- int i_decimate_8x8 = x264_mb_decimate_score( h->dct.luma8x8[idx], 64 );
- i_decimate_mb += i_decimate_8x8;
- if( i_decimate_8x8 < 4 )
- {
- memset( h->dct.luma8x8[idx], 0, sizeof( h->dct.luma8x8[idx] ) );
- memset( dct8x8[idx], 0, sizeof( dct8x8[idx] ) );
- nnz8x8[idx] = 0;
- }
- }
- }
- if( i_decimate_mb < 6 && !h->mb.b_trellis )
- memset( h->dct.luma8x8, 0, sizeof( h->dct.luma8x8 ) );
- else
- {
- for( idx = 0; idx < 4; idx++ )
- if( nnz8x8[idx] )
- {
- h->quantf.dequant_8x8( dct8x8[idx], h->dequant8_mf[CQM_8PY], i_qp );
- h->dctf.add8x8_idct8( &h->mb.pic.p_fdec[0][(idx&1)*8 + (idx>>1)*8*FDEC_STRIDE], FDEC_STRIDE, dct8x8[idx] );
- }
- }
- }
- else
- {
- int16_t dct4x4[16][4][4];
- int nnz8x8[4] = {1,1,1,1};
- h->dctf.sub16x16_dct( dct4x4,
- h->mb.pic.p_fenc[0], FENC_STRIDE,
- h->mb.pic.p_fdec[0], FDEC_STRIDE );
- for( i8x8 = 0; i8x8 < 4; i8x8++ )
- {
- int i_decimate_8x8;
- /* encode one 4x4 block */
- i_decimate_8x8 = 0;
- for( i4x4 = 0; i4x4 < 4; i4x4++ )
- {
- idx = i8x8 * 4 + i4x4;
- if( h->mb.b_noise_reduction )
- x264_denoise_dct( h, (int16_t*)dct4x4[idx] );
- if( h->mb.b_trellis )
- x264_quant_4x4_trellis( h, dct4x4[idx], CQM_4PY, i_qp, DCT_LUMA_4x4, 0 );
- else
- quant_4x4( h, dct4x4[idx], h->quant4_mf[CQM_4PY], i_qp, 0 );
- scan_zigzag_4x4full( h->dct.block[idx].luma4x4, dct4x4[idx] );
- i_decimate_8x8 += x264_mb_decimate_score( h->dct.block[idx].luma4x4, 16 );
- }
- /* decimate this 8x8 block */
- i_decimate_mb += i_decimate_8x8;
- if( i_decimate_8x8 < 4 )
- {
- memset( &dct4x4[i8x8*4], 0, 4 * sizeof( *dct4x4 ) );
- memset( &h->dct.block[i8x8*4], 0, 4 * sizeof( *h->dct.block ) );
- nnz8x8[i8x8] = 0;
- }
- }
- if( i_decimate_mb < 6 )
- memset( h->dct.block, 0, 16 * sizeof( *h->dct.block ) );
- else
- {
- for( i8x8 = 0; i8x8 < 4; i8x8++ )
- if( nnz8x8[i8x8] )
- {
- for( i = 0; i < 4; i++ )
- h->quantf.dequant_4x4( dct4x4[i8x8*4+i], h->dequant4_mf[CQM_4PY], i_qp );
- h->dctf.add8x8_idct( &h->mb.pic.p_fdec[0][(i8x8&1)*8 + (i8x8>>1)*8*FDEC_STRIDE], FDEC_STRIDE, &dct4x4[i8x8*4] );
- }
- }
- }
- }
- /* encode chroma */
- i_qp = i_chroma_qp_table[x264_clip3( i_qp + h->pps->i_chroma_qp_index_offset, 0, 51 )];
- if( IS_INTRA( h->mb.i_type ) )
- {
- const int i_mode = h->mb.i_chroma_pred_mode;
- h->predict_8x8c[i_mode]( h->mb.pic.p_fdec[1] );
- h->predict_8x8c[i_mode]( h->mb.pic.p_fdec[2] );
- }
- /* encode the 8x8 blocks */
- x264_mb_encode_8x8_chroma( h, !IS_INTRA( h->mb.i_type ), i_qp );
- /* Calculate the Luma/Chroma patern and non_zero_count */
- h->mb.i_cbp_luma = 0x00;
- if( h->mb.i_type == I_16x16 )
- {
- for( i = 0; i < 16; i++ )
- {
- const int nz = array_non_zero_count( h->dct.block[i].residual_ac, 15 );
- h->mb.cache.non_zero_count[x264_scan8[i]] = nz;
- if( nz > 0 )
- h->mb.i_cbp_luma = 0x0f;
- }
- }
- else if( h->mb.b_transform_8x8 )
- {
- /* coded_block_flag is enough for CABAC.
- * the full non_zero_count is done only in CAVLC. */
- for( i = 0; i < 4; i++ )
- {
- const int nz = array_non_zero( h->dct.luma8x8[i], 64 );
- int j;
- for( j = 0; j < 4; j++ )
- h->mb.cache.non_zero_count[x264_scan8[4*i+j]] = nz;
- if( nz > 0 )
- h->mb.i_cbp_luma |= 1 << i;
- }
- }
- else
- {
- for( i = 0; i < 16; i++ )
- {
- const int nz = array_non_zero_count( h->dct.block[i].luma4x4, 16 );
- h->mb.cache.non_zero_count[x264_scan8[i]] = nz;
- if( nz > 0 )
- h->mb.i_cbp_luma |= 1 << (i/4);
- }
- }
- /* Calculate the chroma patern */
- h->mb.i_cbp_chroma = 0x00;
- for( i = 0; i < 8; i++ )
- {
- const int nz = array_non_zero_count( h->dct.block[16+i].residual_ac, 15 );
- h->mb.cache.non_zero_count[x264_scan8[16+i]] = nz;
- if( nz > 0 )
- {
- h->mb.i_cbp_chroma = 0x02; /* dc+ac (we can't do only ac) */
- }
- }
- if( h->mb.i_cbp_chroma == 0x00 && array_non_zero( h->dct.chroma_dc[0], 8 ) )
- {
- h->mb.i_cbp_chroma = 0x01; /* dc only */
- }
- if( h->param.b_cabac )
- {
- i_cbp_dc = ( h->mb.i_type == I_16x16 && array_non_zero( h->dct.luma16x16_dc, 16 ) )
- | array_non_zero( h->dct.chroma_dc[0], 4 ) << 1
- | array_non_zero( h->dct.chroma_dc[1], 4 ) << 2;
- }
- /* store cbp */
- h->mb.cbp[h->mb.i_mb_xy] = (i_cbp_dc << 8) | (h->mb.i_cbp_chroma << 4) | h->mb.i_cbp_luma;
- /* Check for P_SKIP
- * XXX: in the me perhaps we should take x264_mb_predict_mv_pskip into account
- * (if multiple mv give same result)*/
- if( h->mb.i_type == P_L0 && h->mb.i_partition == D_16x16 &&
- h->mb.i_cbp_luma == 0x00 && h->mb.i_cbp_chroma== 0x00 &&
- h->mb.cache.ref[0][x264_scan8[0]] == 0 )
- {
- int mvp[2];
- x264_mb_predict_mv_pskip( h, mvp );
- if( h->mb.cache.mv[0][x264_scan8[0]][0] == mvp[0] &&
- h->mb.cache.mv[0][x264_scan8[0]][1] == mvp[1] )
- {
- h->mb.i_type = P_SKIP;
- }
- }
- /* Check for B_SKIP */
- if( h->mb.i_type == B_DIRECT &&
- h->mb.i_cbp_luma == 0x00 && h->mb.i_cbp_chroma== 0x00 )
- {
- h->mb.i_type = B_SKIP;
- }
- }
- /*****************************************************************************
- * x264_macroblock_probe_skip:
- * Check if the current MB could be encoded as a [PB]_SKIP (it supposes you use
- * the previous QP
- *****************************************************************************/
- int x264_macroblock_probe_skip( x264_t *h, int b_bidir )
- {
- DECLARE_ALIGNED( int16_t, dct4x4[16][4][4], 16 );
- DECLARE_ALIGNED( int16_t, dct2x2[2][2], 16 );
- DECLARE_ALIGNED( int, dctscan[16], 16 );
- int i_qp = h->mb.i_qp;
- int mvp[2];
- int ch;
- int i8x8, i4x4;
- int i_decimate_mb;
- if( !b_bidir )
- {
- /* Get the MV */
- x264_mb_predict_mv_pskip( h, mvp );
- mvp[0] = x264_clip3( mvp[0], h->mb.mv_min[0], h->mb.mv_max[0] );
- mvp[1] = x264_clip3( mvp[1], h->mb.mv_min[1], h->mb.mv_max[1] );
- /* Motion compensation */
- h->mc.mc_luma( h->mb.pic.p_fref[0][0], h->mb.pic.i_stride[0],
- h->mb.pic.p_fdec[0], FDEC_STRIDE,
- mvp[0], mvp[1], 16, 16 );
- }
- /* get luma diff */
- h->dctf.sub16x16_dct( dct4x4, h->mb.pic.p_fenc[0], FENC_STRIDE,
- h->mb.pic.p_fdec[0], FDEC_STRIDE );
- for( i8x8 = 0, i_decimate_mb = 0; i8x8 < 4; i8x8++ )
- {
- /* encode one 4x4 block */
- for( i4x4 = 0; i4x4 < 4; i4x4++ )
- {
- const int idx = i8x8 * 4 + i4x4;
- quant_4x4( h, dct4x4[idx], (int(*)[4][4])def_quant4_mf, i_qp, 0 );
- scan_zigzag_4x4full( dctscan, dct4x4[idx] );
- i_decimate_mb += x264_mb_decimate_score( dctscan, 16 );
- if( i_decimate_mb >= 6 )
- {
- /* not as P_SKIP */
- return 0;
- }
- }
- }
- /* encode chroma */
- i_qp = i_chroma_qp_table[x264_clip3( i_qp + h->pps->i_chroma_qp_index_offset, 0, 51 )];
- for( ch = 0; ch < 2; ch++ )
- {
- uint8_t *p_src = h->mb.pic.p_fenc[1+ch];
- uint8_t *p_dst = h->mb.pic.p_fdec[1+ch];
- if( !b_bidir )
- {
- h->mc.mc_chroma( h->mb.pic.p_fref[0][0][4+ch], h->mb.pic.i_stride[1+ch],
- h->mb.pic.p_fdec[1+ch], FDEC_STRIDE,
- mvp[0], mvp[1], 8, 8 );
- }
- h->dctf.sub8x8_dct( dct4x4, p_src, FENC_STRIDE, p_dst, FDEC_STRIDE );
- /* calculate dct DC */
- dct2x2[0][0] = dct4x4[0][0][0];
- dct2x2[0][1] = dct4x4[1][0][0];
- dct2x2[1][0] = dct4x4[2][0][0];
- dct2x2[1][1] = dct4x4[3][0][0];
- h->dctf.dct2x2dc( dct2x2 );
- quant_2x2_dc( h, dct2x2, (int(*)[4][4])def_quant4_mf, i_qp, 0 );
- if( dct2x2[0][0] || dct2x2[0][1] || dct2x2[1][0] || dct2x2[1][1] )
- {
- /* can't be */
- return 0;
- }
- /* calculate dct coeffs */
- for( i4x4 = 0, i_decimate_mb = 0; i4x4 < 4; i4x4++ )
- {
- quant_4x4( h, dct4x4[i4x4], (int(*)[4][4])def_quant4_mf, i_qp, 0 );
- scan_zigzag_4x4( dctscan, dct4x4[i4x4] );
- i_decimate_mb += x264_mb_decimate_score( dctscan, 15 );
- if( i_decimate_mb >= 7 )
- {
- return 0;
- }
- }
- }
- return 1;
- }
- /****************************************************************************
- * DCT-domain noise reduction / adaptive deadzone
- * from libavcodec
- ****************************************************************************/
- void x264_noise_reduction_update( x264_t *h )
- {
- int cat, i;
- for( cat = 0; cat < 2; cat++ )
- {
- int size = cat ? 64 : 16;
- const int *weight = cat ? x264_dct8_weight2_tab : x264_dct4_weight2_tab;
- if( h->nr_count[cat] > (cat ? (1<<16) : (1<<18)) )
- {
- for( i = 0; i < size; i++ )
- h->nr_residual_sum[cat][i] >>= 1;
- h->nr_count[cat] >>= 1;
- }
- for( i = 0; i < size; i++ )
- h->nr_offset[cat][i] =
- ((uint64_t)h->param.analyse.i_noise_reduction * h->nr_count[cat]
- + h->nr_residual_sum[cat][i]/2)
- / ((uint64_t)h->nr_residual_sum[cat][i] * weight[i]/256 + 1);
- }
- }
- void x264_denoise_dct( x264_t *h, int16_t *dct )
- {
- const int cat = h->mb.b_transform_8x8;
- int i;
- h->nr_count[cat]++;
- for( i = (cat ? 63 : 15); i >= 1; i-- )
- {
- int level = dct[i];
- if( level )
- {
- if( level > 0 )
- {
- h->nr_residual_sum[cat][i] += level;
- level -= h->nr_offset[cat][i];
- if( level < 0 )
- level = 0;
- }
- else
- {
- h->nr_residual_sum[cat][i] -= level;
- level += h->nr_offset[cat][i];
- if( level > 0 )
- level = 0;
- }
- dct[i] = level;
- }
- }
- }