| /***************************************************************************** |
| * quant.c: h264 encoder library |
| ***************************************************************************** |
| * Copyright (C) 2005-2008 x264 project |
| * |
| * Authors: Loren Merritt <lorenm@u.washington.edu> |
| * Christian Heine <sennindemokrit@gmx.net> |
| * |
| * 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.h" |
| |
| #ifdef HAVE_MMX |
| #include "x86/quant.h" |
| #endif |
| #ifdef ARCH_PPC |
| # include "ppc/quant.h" |
| #endif |
| |
| #define QUANT_ONE( coef, mf, f ) \ |
| { \ |
| if( (coef) > 0 ) \ |
| (coef) = (f + (coef)) * (mf) >> 16; \ |
| else \ |
| (coef) = - ((f - (coef)) * (mf) >> 16); \ |
| } |
| |
| static void quant_8x8( int16_t dct[8][8], uint16_t mf[64], uint16_t bias[64] ) |
| { |
| int i; |
| for( i = 0; i < 64; i++ ) |
| QUANT_ONE( dct[0][i], mf[i], bias[i] ); |
| } |
| |
| static void quant_4x4( int16_t dct[4][4], uint16_t mf[16], uint16_t bias[16] ) |
| { |
| int i; |
| for( i = 0; i < 16; i++ ) |
| QUANT_ONE( dct[0][i], mf[i], bias[i] ); |
| } |
| |
| static void quant_4x4_dc( int16_t dct[4][4], int mf, int bias ) |
| { |
| int i; |
| for( i = 0; i < 16; i++ ) |
| QUANT_ONE( dct[0][i], mf, bias ); |
| } |
| |
| static void quant_2x2_dc( int16_t dct[2][2], int mf, int bias ) |
| { |
| QUANT_ONE( dct[0][0], mf, bias ); |
| QUANT_ONE( dct[0][1], mf, bias ); |
| QUANT_ONE( dct[0][2], mf, bias ); |
| QUANT_ONE( dct[0][3], mf, bias ); |
| } |
| |
| #define DEQUANT_SHL( x ) \ |
| dct[y][x] = ( dct[y][x] * dequant_mf[i_mf][y][x] ) << i_qbits |
| |
| #define DEQUANT_SHR( x ) \ |
| dct[y][x] = ( dct[y][x] * dequant_mf[i_mf][y][x] + f ) >> (-i_qbits) |
| |
| static void dequant_4x4( int16_t dct[4][4], int dequant_mf[6][4][4], int i_qp ) |
| { |
| const int i_mf = i_qp%6; |
| const int i_qbits = i_qp/6 - 4; |
| int y; |
| |
| if( i_qbits >= 0 ) |
| { |
| for( y = 0; y < 4; y++ ) |
| { |
| DEQUANT_SHL( 0 ); |
| DEQUANT_SHL( 1 ); |
| DEQUANT_SHL( 2 ); |
| DEQUANT_SHL( 3 ); |
| } |
| } |
| else |
| { |
| const int f = 1 << (-i_qbits-1); |
| for( y = 0; y < 4; y++ ) |
| { |
| DEQUANT_SHR( 0 ); |
| DEQUANT_SHR( 1 ); |
| DEQUANT_SHR( 2 ); |
| DEQUANT_SHR( 3 ); |
| } |
| } |
| } |
| |
| static void dequant_8x8( int16_t dct[8][8], int dequant_mf[6][8][8], int i_qp ) |
| { |
| const int i_mf = i_qp%6; |
| const int i_qbits = i_qp/6 - 6; |
| int y; |
| |
| if( i_qbits >= 0 ) |
| { |
| for( y = 0; y < 8; y++ ) |
| { |
| DEQUANT_SHL( 0 ); |
| DEQUANT_SHL( 1 ); |
| DEQUANT_SHL( 2 ); |
| DEQUANT_SHL( 3 ); |
| DEQUANT_SHL( 4 ); |
| DEQUANT_SHL( 5 ); |
| DEQUANT_SHL( 6 ); |
| DEQUANT_SHL( 7 ); |
| } |
| } |
| else |
| { |
| const int f = 1 << (-i_qbits-1); |
| for( y = 0; y < 8; y++ ) |
| { |
| DEQUANT_SHR( 0 ); |
| DEQUANT_SHR( 1 ); |
| DEQUANT_SHR( 2 ); |
| DEQUANT_SHR( 3 ); |
| DEQUANT_SHR( 4 ); |
| DEQUANT_SHR( 5 ); |
| DEQUANT_SHR( 6 ); |
| DEQUANT_SHR( 7 ); |
| } |
| } |
| } |
| |
| static void dequant_4x4_dc( int16_t dct[4][4], int dequant_mf[6][4][4], int i_qp ) |
| { |
| const int i_qbits = i_qp/6 - 6; |
| int y; |
| |
| if( i_qbits >= 0 ) |
| { |
| const int i_dmf = dequant_mf[i_qp%6][0][0] << i_qbits; |
| |
| for( y = 0; y < 4; y++ ) |
| { |
| dct[y][0] *= i_dmf; |
| dct[y][1] *= i_dmf; |
| dct[y][2] *= i_dmf; |
| dct[y][3] *= i_dmf; |
| } |
| } |
| else |
| { |
| const int i_dmf = dequant_mf[i_qp%6][0][0]; |
| const int f = 1 << (-i_qbits-1); |
| |
| for( y = 0; y < 4; y++ ) |
| { |
| dct[y][0] = ( dct[y][0] * i_dmf + f ) >> (-i_qbits); |
| dct[y][1] = ( dct[y][1] * i_dmf + f ) >> (-i_qbits); |
| dct[y][2] = ( dct[y][2] * i_dmf + f ) >> (-i_qbits); |
| dct[y][3] = ( dct[y][3] * i_dmf + f ) >> (-i_qbits); |
| } |
| } |
| } |
| |
| static void x264_denoise_dct( int16_t *dct, uint32_t *sum, uint16_t *offset, int size ) |
| { |
| int i; |
| for( i=1; i<size; i++ ) |
| { |
| int level = dct[i]; |
| int sign = level>>15; |
| level = (level+sign)^sign; |
| sum[i] += level; |
| level -= offset[i]; |
| dct[i] = level<0 ? 0 : (level^sign)-sign; |
| } |
| } |
| |
| /* (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 |
| */ |
| |
| const uint8_t x264_decimate_table4[16] = { |
| 3,2,2,1,1,1,0,0,0,0,0,0,0,0,0,0 }; |
| const uint8_t x264_decimate_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 }; |
| |
| static int ALWAYS_INLINE x264_decimate_score_internal( int16_t *dct, int i_max ) |
| { |
| const uint8_t *ds_table = (i_max == 64) ? x264_decimate_table8 : x264_decimate_table4; |
| int i_score = 0; |
| int idx = i_max - 1; |
| |
| /* Yes, dct[idx-1] is guaranteed to be 32-bit aligned. idx>=0 instead of 1 works correctly for the same reason */ |
| while( idx >= 0 && *(uint32_t*)&dct[idx-1] == 0 ) |
| idx -= 2; |
| if( idx >= 0 && dct[idx] == 0 ) |
| idx--; |
| while( idx >= 0 ) |
| { |
| int i_run; |
| |
| if( (unsigned)(dct[idx--] + 1) > 2 ) |
| return 9; |
| |
| i_run = 0; |
| while( idx >= 0 && dct[idx] == 0 ) |
| { |
| idx--; |
| i_run++; |
| } |
| i_score += ds_table[i_run]; |
| } |
| |
| return i_score; |
| } |
| |
| static int x264_decimate_score15( int16_t *dct ) |
| { |
| return x264_decimate_score_internal( dct+1, 15 ); |
| } |
| static int x264_decimate_score16( int16_t *dct ) |
| { |
| return x264_decimate_score_internal( dct, 16 ); |
| } |
| static int x264_decimate_score64( int16_t *dct ) |
| { |
| return x264_decimate_score_internal( dct, 64 ); |
| } |
| |
| static int ALWAYS_INLINE x264_coeff_last_internal( int16_t *l, int i_count ) |
| { |
| int i_last; |
| for( i_last = i_count-1; i_last >= 3; i_last -= 4 ) |
| if( *(uint64_t*)(l+i_last-3) ) |
| break; |
| while( i_last >= 0 && l[i_last] == 0 ) |
| i_last--; |
| return i_last; |
| } |
| |
| static int x264_coeff_last4( int16_t *l ) |
| { |
| return x264_coeff_last_internal( l, 4 ); |
| } |
| static int x264_coeff_last15( int16_t *l ) |
| { |
| return x264_coeff_last_internal( l, 15 ); |
| } |
| static int x264_coeff_last16( int16_t *l ) |
| { |
| return x264_coeff_last_internal( l, 16 ); |
| } |
| static int x264_coeff_last64( int16_t *l ) |
| { |
| return x264_coeff_last_internal( l, 64 ); |
| } |
| |
| void x264_quant_init( x264_t *h, int cpu, x264_quant_function_t *pf ) |
| { |
| pf->quant_8x8 = quant_8x8; |
| pf->quant_4x4 = quant_4x4; |
| pf->quant_4x4_dc = quant_4x4_dc; |
| pf->quant_2x2_dc = quant_2x2_dc; |
| |
| pf->dequant_4x4 = dequant_4x4; |
| pf->dequant_4x4_dc = dequant_4x4_dc; |
| pf->dequant_8x8 = dequant_8x8; |
| |
| pf->denoise_dct = x264_denoise_dct; |
| pf->decimate_score15 = x264_decimate_score15; |
| pf->decimate_score16 = x264_decimate_score16; |
| pf->decimate_score64 = x264_decimate_score64; |
| |
| pf->coeff_last[DCT_CHROMA_DC] = x264_coeff_last4; |
| pf->coeff_last[ DCT_LUMA_AC] = x264_coeff_last15; |
| pf->coeff_last[ DCT_LUMA_4x4] = x264_coeff_last16; |
| pf->coeff_last[ DCT_LUMA_8x8] = x264_coeff_last64; |
| |
| #ifdef HAVE_MMX |
| if( cpu&X264_CPU_MMX ) |
| { |
| #ifdef ARCH_X86 |
| pf->quant_4x4 = x264_quant_4x4_mmx; |
| pf->quant_8x8 = x264_quant_8x8_mmx; |
| pf->dequant_4x4 = x264_dequant_4x4_mmx; |
| pf->dequant_4x4_dc = x264_dequant_4x4dc_mmxext; |
| pf->dequant_8x8 = x264_dequant_8x8_mmx; |
| if( h->param.i_cqm_preset == X264_CQM_FLAT ) |
| { |
| pf->dequant_4x4 = x264_dequant_4x4_flat16_mmx; |
| pf->dequant_8x8 = x264_dequant_8x8_flat16_mmx; |
| } |
| pf->denoise_dct = x264_denoise_dct_mmx; |
| #endif |
| } |
| |
| if( cpu&X264_CPU_MMXEXT ) |
| { |
| pf->quant_2x2_dc = x264_quant_2x2_dc_mmxext; |
| #ifdef ARCH_X86 |
| pf->quant_4x4_dc = x264_quant_4x4_dc_mmxext; |
| pf->decimate_score15 = x264_decimate_score15_mmxext; |
| pf->decimate_score16 = x264_decimate_score16_mmxext; |
| pf->decimate_score64 = x264_decimate_score64_mmxext; |
| pf->coeff_last[ DCT_LUMA_AC] = x264_coeff_last15_mmxext; |
| pf->coeff_last[ DCT_LUMA_4x4] = x264_coeff_last16_mmxext; |
| pf->coeff_last[ DCT_LUMA_8x8] = x264_coeff_last64_mmxext; |
| #endif |
| pf->coeff_last[DCT_CHROMA_DC] = x264_coeff_last4_mmxext; |
| } |
| |
| if( cpu&X264_CPU_SSE2 ) |
| { |
| pf->quant_4x4_dc = x264_quant_4x4_dc_sse2; |
| pf->quant_4x4 = x264_quant_4x4_sse2; |
| pf->quant_8x8 = x264_quant_8x8_sse2; |
| pf->dequant_4x4 = x264_dequant_4x4_sse2; |
| pf->dequant_4x4_dc = x264_dequant_4x4dc_sse2; |
| pf->dequant_8x8 = x264_dequant_8x8_sse2; |
| if( h->param.i_cqm_preset == X264_CQM_FLAT ) |
| { |
| pf->dequant_4x4 = x264_dequant_4x4_flat16_sse2; |
| pf->dequant_8x8 = x264_dequant_8x8_flat16_sse2; |
| } |
| pf->denoise_dct = x264_denoise_dct_sse2; |
| pf->decimate_score15 = x264_decimate_score15_sse2; |
| pf->decimate_score16 = x264_decimate_score16_sse2; |
| pf->decimate_score64 = x264_decimate_score64_sse2; |
| pf->coeff_last[ DCT_LUMA_AC] = x264_coeff_last15_sse2; |
| pf->coeff_last[DCT_LUMA_4x4] = x264_coeff_last16_sse2; |
| pf->coeff_last[DCT_LUMA_8x8] = x264_coeff_last64_sse2; |
| } |
| |
| if( cpu&X264_CPU_SSSE3 ) |
| { |
| pf->quant_2x2_dc = x264_quant_2x2_dc_ssse3; |
| pf->quant_4x4_dc = x264_quant_4x4_dc_ssse3; |
| pf->quant_4x4 = x264_quant_4x4_ssse3; |
| pf->quant_8x8 = x264_quant_8x8_ssse3; |
| pf->denoise_dct = x264_denoise_dct_ssse3; |
| pf->decimate_score15 = x264_decimate_score15_ssse3; |
| pf->decimate_score16 = x264_decimate_score16_ssse3; |
| pf->decimate_score64 = x264_decimate_score64_ssse3; |
| } |
| #endif // HAVE_MMX |
| |
| #ifdef ARCH_PPC |
| if( cpu&X264_CPU_ALTIVEC ) { |
| pf->quant_2x2_dc = x264_quant_2x2_dc_altivec; |
| pf->quant_4x4_dc = x264_quant_4x4_dc_altivec; |
| pf->quant_4x4 = x264_quant_4x4_altivec; |
| pf->quant_8x8 = x264_quant_8x8_altivec; |
| |
| pf->dequant_4x4 = x264_dequant_4x4_altivec; |
| pf->dequant_8x8 = x264_dequant_8x8_altivec; |
| } |
| #endif |
| pf->coeff_last[ DCT_LUMA_DC] = pf->coeff_last[DCT_LUMA_4x4]; |
| pf->coeff_last[DCT_CHROMA_AC] = pf->coeff_last[ DCT_LUMA_AC]; |
| } |
