mc.c
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Audio
开发平台:
Visual C++
- /*****************************************************************************
- * mc.c: h264 encoder library (Motion Compensation)
- *****************************************************************************
- * Copyright (C) 2003 Laurent Aimar
- * $Id: mc.c,v 1.1 2004/06/03 19:27:07 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.h"
- #include "clip1.h"
- #ifdef HAVE_MMXEXT
- #include "i386/mc.h"
- #endif
- #ifdef ARCH_PPC
- #include "ppc/mc.h"
- #endif
- static inline int x264_tapfilter( uint8_t *pix, int i_pix_next )
- {
- return pix[-2*i_pix_next] - 5*pix[-1*i_pix_next] + 20*(pix[0] + pix[1*i_pix_next]) - 5*pix[ 2*i_pix_next] + pix[ 3*i_pix_next];
- }
- static inline int x264_tapfilter1( uint8_t *pix )
- {
- return pix[-2] - 5*pix[-1] + 20*(pix[0] + pix[1]) - 5*pix[ 2] + pix[ 3];
- }
- static inline void pixel_avg( uint8_t *dst, int i_dst_stride,
- uint8_t *src1, int i_src1_stride,
- uint8_t *src2, int i_src2_stride,
- int i_width, int i_height )
- {
- int x, y;
- for( y = 0; y < i_height; y++ )
- {
- for( x = 0; x < i_width; x++ )
- {
- dst[x] = ( src1[x] + src2[x] + 1 ) >> 1;
- }
- dst += i_dst_stride;
- src1 += i_src1_stride;
- src2 += i_src2_stride;
- }
- }
- static inline void pixel_avg_wxh( uint8_t *dst, int i_dst, uint8_t *src, int i_src, int width, int height )
- {
- int x, y;
- for( y = 0; y < height; y++ )
- {
- for( x = 0; x < width; x++ )
- {
- dst[x] = ( dst[x] + src[x] + 1 ) >> 1;
- }
- dst += i_dst;
- src += i_src;
- }
- }
- #define PIXEL_AVG_C( name, width, height )
- static void name( uint8_t *pix1, int i_stride_pix1,
- uint8_t *pix2, int i_stride_pix2 )
- {
- pixel_avg_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, width, height );
- }
- PIXEL_AVG_C( pixel_avg_16x16, 16, 16 )
- PIXEL_AVG_C( pixel_avg_16x8, 16, 8 )
- PIXEL_AVG_C( pixel_avg_8x16, 8, 16 )
- PIXEL_AVG_C( pixel_avg_8x8, 8, 8 )
- PIXEL_AVG_C( pixel_avg_8x4, 8, 4 )
- PIXEL_AVG_C( pixel_avg_4x8, 4, 8 )
- PIXEL_AVG_C( pixel_avg_4x4, 4, 4 )
- PIXEL_AVG_C( pixel_avg_4x2, 4, 2 )
- PIXEL_AVG_C( pixel_avg_2x4, 2, 4 )
- PIXEL_AVG_C( pixel_avg_2x2, 2, 2 )
- /* Implicit weighted bipred only:
- * assumes log2_denom = 5, offset = 0, weight1 + weight2 = 64 */
- #define op_scale2(x) dst[x] = x264_clip_uint8( (dst[x]*i_weight1 + src[x]*i_weight2 + (1<<5)) >> 6 )
- static inline void pixel_avg_weight_wxh( uint8_t *dst, int i_dst, uint8_t *src, int i_src, int width, int height, int i_weight1 ){
- int y;
- const int i_weight2 = 64 - i_weight1;
- for(y=0; y<height; y++, dst += i_dst, src += i_src){
- op_scale2(0);
- op_scale2(1);
- if(width==2) continue;
- op_scale2(2);
- op_scale2(3);
- if(width==4) continue;
- op_scale2(4);
- op_scale2(5);
- op_scale2(6);
- op_scale2(7);
- if(width==8) continue;
- op_scale2(8);
- op_scale2(9);
- op_scale2(10);
- op_scale2(11);
- op_scale2(12);
- op_scale2(13);
- op_scale2(14);
- op_scale2(15);
- }
- }
- #define PIXEL_AVG_WEIGHT_C( width, height )
- static void pixel_avg_weight_##width##x##height(
- uint8_t *pix1, int i_stride_pix1,
- uint8_t *pix2, int i_stride_pix2, int i_weight1 )
- {
- pixel_avg_weight_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, width, height, i_weight1 );
- }
- PIXEL_AVG_WEIGHT_C(16,16)
- PIXEL_AVG_WEIGHT_C(16,8)
- PIXEL_AVG_WEIGHT_C(8,16)
- PIXEL_AVG_WEIGHT_C(8,8)
- PIXEL_AVG_WEIGHT_C(8,4)
- PIXEL_AVG_WEIGHT_C(4,8)
- PIXEL_AVG_WEIGHT_C(4,4)
- PIXEL_AVG_WEIGHT_C(4,2)
- PIXEL_AVG_WEIGHT_C(2,4)
- PIXEL_AVG_WEIGHT_C(2,2)
- #undef op_scale2
- #undef PIXEL_AVG_WEIGHT_C
- typedef void (*pf_mc_t)(uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height );
- static void mc_copy( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
- {
- int y;
- for( y = 0; y < i_height; y++ )
- {
- memcpy( dst, src, i_width );
- src += i_src_stride;
- dst += i_dst_stride;
- }
- }
- static inline void mc_hh( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
- {
- int x, y;
- for( y = 0; y < i_height; y++ )
- {
- for( x = 0; x < i_width; x++ )
- {
- dst[x] = x264_mc_clip1( ( x264_tapfilter1( &src[x] ) + 16 ) >> 5 );
- }
- src += i_src_stride;
- dst += i_dst_stride;
- }
- }
- static inline void mc_hv( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
- {
- int x, y;
- for( y = 0; y < i_height; y++ )
- {
- for( x = 0; x < i_width; x++ )
- {
- dst[x] = x264_mc_clip1( ( x264_tapfilter( &src[x], i_src_stride ) + 16 ) >> 5 );
- }
- src += i_src_stride;
- dst += i_dst_stride;
- }
- }
- static inline void mc_hc( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
- {
- uint8_t *out;
- uint8_t *pix;
- int x, y;
- for( x = 0; x < i_width; x++ )
- {
- int tap[6];
- pix = &src[x];
- out = &dst[x];
- tap[0] = x264_tapfilter1( &pix[-2*i_src_stride] );
- tap[1] = x264_tapfilter1( &pix[-1*i_src_stride] );
- tap[2] = x264_tapfilter1( &pix[ 0*i_src_stride] );
- tap[3] = x264_tapfilter1( &pix[ 1*i_src_stride] );
- tap[4] = x264_tapfilter1( &pix[ 2*i_src_stride] );
- for( y = 0; y < i_height; y++ )
- {
- tap[5] = x264_tapfilter1( &pix[ 3*i_src_stride] );
- *out = x264_mc_clip1( ( tap[0] - 5*tap[1] + 20 * tap[2] + 20 * tap[3] -5*tap[4] + tap[5] + 512 ) >> 10 );
- /* Next line */
- pix += i_src_stride;
- out += i_dst_stride;
- tap[0] = tap[1];
- tap[1] = tap[2];
- tap[2] = tap[3];
- tap[3] = tap[4];
- tap[4] = tap[5];
- }
- }
- }
- static void mc_luma( uint8_t *src[4], int i_src_stride,
- uint8_t *dst, int i_dst_stride,
- int mvx,int mvy,
- int i_width, int i_height )
- {
- uint8_t *src1, *src2;
- int correction = (mvx&1) && (mvy&1) && ((mvx&2) ^ (mvy&2));
- int hpel1x = mvx>>1;
- int hpel1y = (mvy+1-correction)>>1;
- int filter1 = (hpel1x & 1) + ( (hpel1y & 1) << 1 );
- src1 = src[filter1] + (hpel1y >> 1) * i_src_stride + (hpel1x >> 1);
- if ( (mvx|mvy) & 1 ) /* qpel interpolation needed */
- {
- int hpel2x = (mvx+1)>>1;
- int hpel2y = (mvy+correction)>>1;
- int filter2 = (hpel2x & 1) + ( (hpel2y & 1) <<1 );
- src2 = src[filter2] + (hpel2y >> 1) * i_src_stride + (hpel2x >> 1);
- pixel_avg( dst, i_dst_stride, src1, i_src_stride,
- src2, i_src_stride, i_width, i_height );
- }
- else
- {
- mc_copy( src1, i_src_stride, dst, i_dst_stride, i_width, i_height );
- }
- }
- static uint8_t *get_ref( uint8_t *src[4], int i_src_stride,
- uint8_t *dst, int * i_dst_stride,
- int mvx,int mvy,
- int i_width, int i_height )
- {
- uint8_t *src1, *src2;
- int correction = (mvx&1) && (mvy&1) && ((mvx&2) ^ (mvy&2));
- int hpel1x = mvx>>1;
- int hpel1y = (mvy+1-correction)>>1;
- int filter1 = (hpel1x & 1) + ( (hpel1y & 1) << 1 );
- src1 = src[filter1] + (hpel1y >> 1) * i_src_stride + (hpel1x >> 1);
- if ( (mvx|mvy) & 1 ) /* qpel interpolation needed */
- {
- int hpel2x = (mvx+1)>>1;
- int hpel2y = (mvy+correction)>>1;
- int filter2 = (hpel2x & 1) + ( (hpel2y & 1) <<1 );
- src2 = src[filter2] + (hpel2y >> 1) * i_src_stride + (hpel2x >> 1);
- pixel_avg( dst, *i_dst_stride, src1, i_src_stride,
- src2, i_src_stride, i_width, i_height );
- return dst;
- }
- else
- {
- *i_dst_stride = i_src_stride;
- return src1;
- }
- }
- /* full chroma mc (ie until 1/8 pixel)*/
- static void motion_compensation_chroma( uint8_t *src, int i_src_stride,
- uint8_t *dst, int i_dst_stride,
- int mvx, int mvy,
- int i_width, int i_height )
- {
- uint8_t *srcp;
- int x, y;
- const int d8x = mvx&0x07;
- const int d8y = mvy&0x07;
- const int cA = (8-d8x)*(8-d8y);
- const int cB = d8x *(8-d8y);
- const int cC = (8-d8x)*d8y;
- const int cD = d8x *d8y;
- src += (mvy >> 3) * i_src_stride + (mvx >> 3);
- srcp = &src[i_src_stride];
- for( y = 0; y < i_height; y++ )
- {
- for( x = 0; x < i_width; x++ )
- {
- dst[x] = ( cA*src[x] + cB*src[x+1] +
- cC*srcp[x] + cD*srcp[x+1] + 32 ) >> 6;
- }
- dst += i_dst_stride;
- src = srcp;
- srcp += i_src_stride;
- }
- }
- #ifdef HAVE_MMXEXT
- static void motion_compensation_chroma_mmxext( uint8_t *src, int i_src_stride,
- uint8_t *dst, int i_dst_stride,
- int mvx, int mvy,
- int i_width, int i_height )
- {
- if (i_width == 2) {
- motion_compensation_chroma(src, i_src_stride, dst, i_dst_stride,
- mvx, mvy, i_width, i_height);
- } else {
- const int d8x = mvx&0x07;
- const int d8y = mvy&0x07;
- src += (mvy >> 3) * i_src_stride + (mvx >> 3);
- x264_mc_chroma_mmxext( src, i_src_stride, dst, i_dst_stride,
- d8x, d8y, i_width, i_height );
- }
- }
- #endif
- #define MC_COPY(W)
- static void mc_copy_w##W( uint8_t *dst, int i_dst, uint8_t *src, int i_src, int i_height )
- {
- mc_copy( src, i_src, dst, i_dst, W, i_height );
- }
- MC_COPY( 16 )
- MC_COPY( 8 )
- MC_COPY( 4 )
- void x264_mc_init( int cpu, x264_mc_functions_t *pf )
- {
- pf->mc_luma = mc_luma;
- pf->get_ref = get_ref;
- pf->mc_chroma = motion_compensation_chroma;
- pf->avg[PIXEL_16x16]= pixel_avg_16x16;
- pf->avg[PIXEL_16x8] = pixel_avg_16x8;
- pf->avg[PIXEL_8x16] = pixel_avg_8x16;
- pf->avg[PIXEL_8x8] = pixel_avg_8x8;
- pf->avg[PIXEL_8x4] = pixel_avg_8x4;
- pf->avg[PIXEL_4x8] = pixel_avg_4x8;
- pf->avg[PIXEL_4x4] = pixel_avg_4x4;
- pf->avg[PIXEL_4x2] = pixel_avg_4x2;
- pf->avg[PIXEL_2x4] = pixel_avg_2x4;
- pf->avg[PIXEL_2x2] = pixel_avg_2x2;
- pf->avg_weight[PIXEL_16x16]= pixel_avg_weight_16x16;
- pf->avg_weight[PIXEL_16x8] = pixel_avg_weight_16x8;
- pf->avg_weight[PIXEL_8x16] = pixel_avg_weight_8x16;
- pf->avg_weight[PIXEL_8x8] = pixel_avg_weight_8x8;
- pf->avg_weight[PIXEL_8x4] = pixel_avg_weight_8x4;
- pf->avg_weight[PIXEL_4x8] = pixel_avg_weight_4x8;
- pf->avg_weight[PIXEL_4x4] = pixel_avg_weight_4x4;
- pf->avg_weight[PIXEL_4x2] = pixel_avg_weight_4x2;
- pf->avg_weight[PIXEL_2x4] = pixel_avg_weight_2x4;
- pf->avg_weight[PIXEL_2x2] = pixel_avg_weight_2x2;
- pf->copy[PIXEL_16x16] = mc_copy_w16;
- pf->copy[PIXEL_8x8] = mc_copy_w8;
- pf->copy[PIXEL_4x4] = mc_copy_w4;
- #ifdef HAVE_MMXEXT
- if( cpu&X264_CPU_MMXEXT ) {
- x264_mc_mmxext_init( pf );
- pf->mc_chroma = motion_compensation_chroma_mmxext;
- }
- #endif
- #ifdef HAVE_SSE2
- if( cpu&X264_CPU_SSE2 )
- x264_mc_sse2_init( pf );
- #endif
- #ifdef ARCH_PPC
- if( cpu&X264_CPU_ALTIVEC )
- x264_mc_altivec_init( pf );
- #endif
- }
- extern void x264_horizontal_filter_mmxext( uint8_t *dst, int i_dst_stride,
- uint8_t *src, int i_src_stride,
- int i_width, int i_height );
- extern void x264_center_filter_mmxext( uint8_t *dst1, int i_dst1_stride,
- uint8_t *dst2, int i_dst2_stride,
- uint8_t *src, int i_src_stride,
- int i_width, int i_height );
- void x264_frame_filter( int cpu, x264_frame_t *frame )
- {
- const int x_inc = 16, y_inc = 16;
- const int stride = frame->i_stride[0];
- int x, y;
- pf_mc_t int_h = mc_hh;
- pf_mc_t int_v = mc_hv;
- pf_mc_t int_hv = mc_hc;
- #ifdef HAVE_MMXEXT
- if ( cpu & X264_CPU_MMXEXT )
- {
- x264_horizontal_filter_mmxext(frame->filtered[1] - 8 * stride - 8, stride,
- frame->plane[0] - 8 * stride - 8, stride,
- stride - 48, frame->i_lines[0] + 16);
- x264_center_filter_mmxext(frame->filtered[2] - 8 * stride - 8, stride,
- frame->filtered[3] - 8 * stride - 8, stride,
- frame->plane[0] - 8 * stride - 8, stride,
- stride - 48, frame->i_lines[0] + 16);
- }
- else
- #endif
- {
- for( y = -8; y < frame->i_lines[0]+8; y += y_inc )
- {
- uint8_t *p_in = frame->plane[0] + y * stride - 8;
- uint8_t *p_h = frame->filtered[1] + y * stride - 8;
- uint8_t *p_v = frame->filtered[2] + y * stride - 8;
- uint8_t *p_hv = frame->filtered[3] + y * stride - 8;
- for( x = -8; x < stride - 64 + 8; x += x_inc )
- {
- int_h( p_in, stride, p_h, stride, x_inc, y_inc );
- int_v( p_in, stride, p_v, stride, x_inc, y_inc );
- int_hv( p_in, stride, p_hv, stride, x_inc, y_inc );
- p_h += x_inc;
- p_v += x_inc;
- p_hv += x_inc;
- p_in += x_inc;
- }
- }
- }
- /* generate integral image:
- * each entry in frame->integral is the sum of all luma samples above and
- * to the left of its location (inclusive).
- * this allows us to calculate the DC of any rectangle by looking only
- * at the corner entries.
- * individual entries will overflow 16 bits, but that's ok:
- * we only need the differences between entries, and those will be correct
- * as long as we don't try to evaluate a rectangle bigger than 16x16.
- * likewise, we don't really have to init the edges to 0, leaving garbage
- * there wouldn't affect the results.*/
- if( frame->integral )
- {
- memset( frame->integral - 32 * stride - 32, 0, stride * sizeof(uint16_t) );
- for( y = -31; y < frame->i_lines[0] + 32; y++ )
- {
- uint8_t *ref = frame->plane[0] + y * stride - 32;
- uint16_t *line = frame->integral + y * stride - 32;
- uint16_t v = line[0] = 0;
- for( x = 1; x < stride; x++ )
- line[x] = v += ref[x] + line[x-stride] - line[x-stride-1];
- }
- }
- }
- void x264_frame_init_lowres( int cpu, x264_frame_t *frame )
- {
- // FIXME: tapfilter?
- const int i_stride = frame->i_stride[0];
- const int i_stride2 = frame->i_stride_lowres;
- const int i_width2 = i_stride2 - 64;
- int x, y, i;
- for( y = 0; y < frame->i_lines_lowres - 1; y++ )
- {
- uint8_t *src0 = &frame->plane[0][2*y*i_stride];
- uint8_t *src1 = src0+i_stride;
- uint8_t *src2 = src1+i_stride;
- uint8_t *dst0 = &frame->lowres[0][y*i_stride2];
- uint8_t *dsth = &frame->lowres[1][y*i_stride2];
- uint8_t *dstv = &frame->lowres[2][y*i_stride2];
- uint8_t *dstc = &frame->lowres[3][y*i_stride2];
- for( x = 0; x < i_width2 - 1; x++ )
- {
- dst0[x] = (src0[2*x ] + src0[2*x+1] + src1[2*x ] + src1[2*x+1] + 2) >> 2;
- dsth[x] = (src0[2*x+1] + src0[2*x+2] + src1[2*x+1] + src1[2*x+2] + 2) >> 2;
- dstv[x] = (src1[2*x ] + src1[2*x+1] + src2[2*x ] + src2[2*x+1] + 2) >> 2;
- dstc[x] = (src1[2*x+1] + src1[2*x+2] + src2[2*x+1] + src2[2*x+2] + 2) >> 2;
- }
- dst0[x] = (src0[2*x ] + src0[2*x+1] + src1[2*x ] + src1[2*x+1] + 2) >> 2;
- dstv[x] = (src1[2*x ] + src1[2*x+1] + src2[2*x ] + src2[2*x+1] + 2) >> 2;
- dsth[x] = (src0[2*x+1] + src1[2*x+1] + 1) >> 1;
- dstc[x] = (src1[2*x+1] + src2[2*x+1] + 1) >> 1;
- }
- for( i = 0; i < 4; i++ )
- memcpy( &frame->lowres[i][y*i_stride2], &frame->lowres[i][(y-1)*i_stride2], i_width2 );
- for( y = 0; y < 16; y++ )
- for( x = 0; x < 16; x++ )
- frame->i_cost_est[x][y] = -1;
- x264_frame_expand_border_lowres( frame );
- }