mc.c
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上传日期:2022-06-04
资源大小:8887k
文件大小:16k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*****************************************************************************
- * mc.c: h264 encoder library (Motion Compensation)
- *****************************************************************************
- * Copyright (C) 2003-2008 x264 project
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Loren Merritt <lorenm@u.washington.edu>
- *
- * 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/mc.h"
- #endif
- #ifdef ARCH_PPC
- #include "ppc/mc.h"
- #endif
- #ifdef ARCH_ARM
- #include "arm/mc.h"
- #endif
- 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 *src1, int i_src1, uint8_t *src2, int i_src2, int width, int height )
- {
- int x, y;
- for( y = 0; y < height; y++ )
- {
- for( x = 0; x < width; x++ )
- {
- dst[x] = ( src1[x] + src2[x] + 1 ) >> 1;
- }
- src1 += i_src1;
- src2 += i_src2;
- dst += i_dst;
- }
- }
- /* Implicit weighted bipred only:
- * assumes log2_denom = 5, offset = 0, weight1 + weight2 = 64 */
- #define op_scale2(x) dst[x] = x264_clip_uint8( (src1[x]*i_weight1 + src2[x]*i_weight2 + (1<<5)) >> 6 )
- static inline void pixel_avg_weight_wxh( uint8_t *dst, int i_dst, uint8_t *src1, int i_src1, uint8_t *src2, int i_src2, 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, src1 += i_src1, src2 += i_src2 )
- {
- 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);
- }
- }
- #undef op_scale2
- #define PIXEL_AVG_C( name, width, height )
- static void name( uint8_t *pix1, int i_stride_pix1,
- uint8_t *pix2, int i_stride_pix2,
- uint8_t *pix3, int i_stride_pix3, int weight )
- {
- if( weight == 32 )
- pixel_avg_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, pix3, i_stride_pix3, width, height );
- else
- pixel_avg_weight_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, pix3, i_stride_pix3, width, height, weight );
- }
- 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 )
- 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;
- }
- }
- #define TAPFILTER(pix, d) ((pix)[x-2*d] + (pix)[x+3*d] - 5*((pix)[x-d] + (pix)[x+2*d]) + 20*((pix)[x] + (pix)[x+d]))
- static void hpel_filter( uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, uint8_t *src,
- int stride, int width, int height, int16_t *buf )
- {
- int x, y;
- for( y=0; y<height; y++ )
- {
- for( x=-2; x<width+3; x++ )
- {
- int v = TAPFILTER(src,stride);
- dstv[x] = x264_clip_uint8((v + 16) >> 5);
- buf[x+2] = v;
- }
- for( x=0; x<width; x++ )
- dstc[x] = x264_clip_uint8((TAPFILTER(buf+2,1) + 512) >> 10);
- for( x=0; x<width; x++ )
- dsth[x] = x264_clip_uint8((TAPFILTER(src,1) + 16) >> 5);
- dsth += stride;
- dstv += stride;
- dstc += stride;
- src += stride;
- }
- }
- static const int hpel_ref0[16] = {0,1,1,1,0,1,1,1,2,3,3,3,0,1,1,1};
- static const int hpel_ref1[16] = {0,0,0,0,2,2,3,2,2,2,3,2,2,2,3,2};
- static void mc_luma( uint8_t *dst, int i_dst_stride,
- uint8_t *src[4], int i_src_stride,
- int mvx, int mvy,
- int i_width, int i_height )
- {
- int qpel_idx = ((mvy&3)<<2) + (mvx&3);
- int offset = (mvy>>2)*i_src_stride + (mvx>>2);
- uint8_t *src1 = src[hpel_ref0[qpel_idx]] + offset + ((mvy&3) == 3) * i_src_stride;
- if( qpel_idx & 5 ) /* qpel interpolation needed */
- {
- uint8_t *src2 = src[hpel_ref1[qpel_idx]] + offset + ((mvx&3) == 3);
- 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 *dst, int *i_dst_stride,
- uint8_t *src[4], int i_src_stride,
- int mvx, int mvy,
- int i_width, int i_height )
- {
- int qpel_idx = ((mvy&3)<<2) + (mvx&3);
- int offset = (mvy>>2)*i_src_stride + (mvx>>2);
- uint8_t *src1 = src[hpel_ref0[qpel_idx]] + offset + ((mvy&3) == 3) * i_src_stride;
- if( qpel_idx & 5 ) /* qpel interpolation needed */
- {
- uint8_t *src2 = src[hpel_ref1[qpel_idx]] + offset + ((mvx&3) == 3);
- 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 mc_chroma( uint8_t *dst, int i_dst_stride,
- uint8_t *src, int i_src_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;
- }
- }
- #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 )
- static void plane_copy( uint8_t *dst, int i_dst,
- uint8_t *src, int i_src, int w, int h)
- {
- while( h-- )
- {
- memcpy( dst, src, w );
- dst += i_dst;
- src += i_src;
- }
- }
- static void prefetch_fenc_null( uint8_t *pix_y, int stride_y,
- uint8_t *pix_uv, int stride_uv, int mb_x )
- {}
- static void prefetch_ref_null( uint8_t *pix, int stride, int parity )
- {}
- static void memzero_aligned( void * dst, int n )
- {
- memset( dst, 0, n );
- }
- static void integral_init4h( uint16_t *sum, uint8_t *pix, int stride )
- {
- int x, v = pix[0]+pix[1]+pix[2]+pix[3];
- for( x=0; x<stride-4; x++ )
- {
- sum[x] = v + sum[x-stride];
- v += pix[x+4] - pix[x];
- }
- }
- static void integral_init8h( uint16_t *sum, uint8_t *pix, int stride )
- {
- int x, v = pix[0]+pix[1]+pix[2]+pix[3]+pix[4]+pix[5]+pix[6]+pix[7];
- for( x=0; x<stride-8; x++ )
- {
- sum[x] = v + sum[x-stride];
- v += pix[x+8] - pix[x];
- }
- }
- static void integral_init4v( uint16_t *sum8, uint16_t *sum4, int stride )
- {
- int x;
- for( x=0; x<stride-8; x++ )
- sum4[x] = sum8[x+4*stride] - sum8[x];
- for( x=0; x<stride-8; x++ )
- sum8[x] = sum8[x+8*stride] + sum8[x+8*stride+4] - sum8[x] - sum8[x+4];
- }
- static void integral_init8v( uint16_t *sum8, int stride )
- {
- int x;
- for( x=0; x<stride-8; x++ )
- sum8[x] = sum8[x+8*stride] - sum8[x];
- }
- void x264_frame_init_lowres( x264_t *h, x264_frame_t *frame )
- {
- uint8_t *src = frame->plane[0];
- int i_stride = frame->i_stride[0];
- int i_height = frame->i_lines[0];
- int i_width = frame->i_width[0];
- int x, y;
- // duplicate last row and column so that their interpolation doesn't have to be special-cased
- for( y=0; y<i_height; y++ )
- src[i_width+y*i_stride] = src[i_width-1+y*i_stride];
- memcpy( src+i_stride*i_height, src+i_stride*(i_height-1), i_width );
- h->mc.frame_init_lowres_core( src, frame->lowres[0], frame->lowres[1], frame->lowres[2], frame->lowres[3],
- i_stride, frame->i_stride_lowres, frame->i_width_lowres, frame->i_lines_lowres );
- x264_frame_expand_border_lowres( frame );
- memset( frame->i_cost_est, -1, sizeof(frame->i_cost_est) );
- for( x = 0; x < h->param.i_bframe + 2; x++ )
- for( y = 0; y < h->param.i_bframe + 2; y++ )
- frame->i_row_satds[y][x][0] = -1;
- for( y = 0; y <= !!h->param.i_bframe; y++ )
- for( x = 0; x <= h->param.i_bframe; x++ )
- frame->lowres_mvs[y][x][0][0] = 0x7FFF;
- }
- static void frame_init_lowres_core( uint8_t *src0, uint8_t *dst0, uint8_t *dsth, uint8_t *dstv, uint8_t *dstc,
- int src_stride, int dst_stride, int width, int height )
- {
- int x,y;
- for( y=0; y<height; y++ )
- {
- uint8_t *src1 = src0+src_stride;
- uint8_t *src2 = src1+src_stride;
- for( x=0; x<width; x++ )
- {
- // slower than naive bilinear, but matches asm
- #define FILTER(a,b,c,d) ((((a+b+1)>>1)+((c+d+1)>>1)+1)>>1)
- dst0[x] = FILTER(src0[2*x ], src1[2*x ], src0[2*x+1], src1[2*x+1]);
- dsth[x] = FILTER(src0[2*x+1], src1[2*x+1], src0[2*x+2], src1[2*x+2]);
- dstv[x] = FILTER(src1[2*x ], src2[2*x ], src1[2*x+1], src2[2*x+1]);
- dstc[x] = FILTER(src1[2*x+1], src2[2*x+1], src1[2*x+2], src2[2*x+2]);
- #undef FILTER
- }
- src0 += src_stride*2;
- dst0 += dst_stride;
- dsth += dst_stride;
- dstv += dst_stride;
- dstc += dst_stride;
- }
- }
- #if defined(__GNUC__) && (defined(ARCH_X86) || defined(ARCH_X86_64))
- // gcc isn't smart enough to use the "idiv" instruction
- static ALWAYS_INLINE int32_t div_64_32(int64_t x, int32_t y) {
- int32_t quotient, remainder;
- asm("idiv %4"
- :"=a"(quotient), "=d"(remainder)
- :"a"((uint32_t)x), "d"((int32_t)(x>>32)), "r"(y)
- );
- return quotient;
- }
- #else
- #define div_64_32(x,y) ((x)/(y))
- #endif
- /* Estimate the total amount of influence on future quality that could be had if we
- * were to improve the reference samples used to inter predict any given macroblock. */
- static void mbtree_propagate_cost( int *dst, uint16_t *propagate_in, uint16_t *intra_costs,
- uint16_t *inter_costs, uint16_t *inv_qscales, int len )
- {
- int i;
- for( i=0; i<len; i++ )
- {
- int propagate_amount = propagate_in[i] + ((intra_costs[i] * inv_qscales[i] + 128)>>8);
- dst[i] = div_64_32((int64_t)propagate_amount * (intra_costs[i] - inter_costs[i]), intra_costs[i]);
- }
- }
- void x264_mc_init( int cpu, x264_mc_functions_t *pf )
- {
- pf->mc_luma = mc_luma;
- pf->get_ref = get_ref;
- pf->mc_chroma = mc_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->copy_16x16_unaligned = mc_copy_w16;
- pf->copy[PIXEL_16x16] = mc_copy_w16;
- pf->copy[PIXEL_8x8] = mc_copy_w8;
- pf->copy[PIXEL_4x4] = mc_copy_w4;
- pf->plane_copy = plane_copy;
- pf->hpel_filter = hpel_filter;
- pf->prefetch_fenc = prefetch_fenc_null;
- pf->prefetch_ref = prefetch_ref_null;
- pf->memcpy_aligned = memcpy;
- pf->memzero_aligned = memzero_aligned;
- pf->frame_init_lowres_core = frame_init_lowres_core;
- pf->integral_init4h = integral_init4h;
- pf->integral_init8h = integral_init8h;
- pf->integral_init4v = integral_init4v;
- pf->integral_init8v = integral_init8v;
- pf->mbtree_propagate_cost = mbtree_propagate_cost;
- #ifdef HAVE_MMX
- x264_mc_init_mmx( cpu, pf );
- #endif
- #ifdef ARCH_PPC
- if( cpu&X264_CPU_ALTIVEC )
- x264_mc_altivec_init( pf );
- #endif
- #ifdef HAVE_ARMV6
- x264_mc_init_arm( cpu, pf );
- #endif
- }
- void x264_frame_filter( x264_t *h, x264_frame_t *frame, int mb_y, int b_end )
- {
- const int b_interlaced = h->sh.b_mbaff;
- const int stride = frame->i_stride[0] << b_interlaced;
- const int width = frame->i_width[0];
- int start = (mb_y*16 >> b_interlaced) - 8; // buffer = 4 for deblock + 3 for 6tap, rounded to 8
- int height = ((b_end ? frame->i_lines[0] : mb_y*16) >> b_interlaced) + 8;
- int offs = start*stride - 8; // buffer = 3 for 6tap, aligned to 8 for simd
- int y;
- if( mb_y & b_interlaced )
- return;
- for( y=0; y<=b_interlaced; y++, offs+=frame->i_stride[0] )
- {
- h->mc.hpel_filter(
- frame->filtered[1] + offs,
- frame->filtered[2] + offs,
- frame->filtered[3] + offs,
- frame->plane[0] + offs,
- stride, width + 16, height - start,
- h->scratch_buffer );
- }
- /* generate integral image:
- * frame->integral contains 2 planes. in the upper plane, each element is
- * the sum of an 8x8 pixel region with top-left corner on that point.
- * in the lower plane, 4x4 sums (needed only with --partitions p4x4). */
- if( frame->integral )
- {
- if( start < 0 )
- {
- memset( frame->integral - PADV * stride - PADH, 0, stride * sizeof(uint16_t) );
- start = -PADV;
- }
- if( b_end )
- height += PADV-9;
- for( y = start; y < height; y++ )
- {
- uint8_t *pix = frame->plane[0] + y * stride - PADH;
- uint16_t *sum8 = frame->integral + (y+1) * stride - PADH;
- uint16_t *sum4;
- if( h->frames.b_have_sub8x8_esa )
- {
- h->mc.integral_init4h( sum8, pix, stride );
- sum8 -= 8*stride;
- sum4 = sum8 + stride * (frame->i_lines[0] + PADV*2);
- if( y >= 8-PADV )
- h->mc.integral_init4v( sum8, sum4, stride );
- }
- else
- {
- h->mc.integral_init8h( sum8, pix, stride );
- if( y >= 8-PADV )
- h->mc.integral_init8v( sum8-8*stride, stride );
- }
- }
- }
- }