1 /*****************************************************************************
2 * mc.c: h264 encoder library (Motion Compensation)
3 *****************************************************************************
4 * Copyright (C) 2003-2008 x264 project
6 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
7 * Loren Merritt <lorenm@u.washington.edu>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
22 *****************************************************************************/
34 static inline void pixel_avg( uint8_t *dst, int i_dst_stride,
35 uint8_t *src1, int i_src1_stride,
36 uint8_t *src2, int i_src2_stride,
37 int i_width, int i_height )
40 for( y = 0; y < i_height; y++ )
42 for( x = 0; x < i_width; x++ )
44 dst[x] = ( src1[x] + src2[x] + 1 ) >> 1;
47 src1 += i_src1_stride;
48 src2 += i_src2_stride;
52 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 )
55 for( y = 0; y < height; y++ )
57 for( x = 0; x < width; x++ )
59 dst[x] = ( src1[x] + src2[x] + 1 ) >> 1;
67 /* Implicit weighted bipred only:
68 * assumes log2_denom = 5, offset = 0, weight1 + weight2 = 64 */
69 #define op_scale2(x) dst[x] = x264_clip_uint8( (src1[x]*i_weight1 + src2[x]*i_weight2 + (1<<5)) >> 6 )
70 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 )
73 const int i_weight2 = 64 - i_weight1;
74 for( y = 0; y<height; y++, dst += i_dst, src1 += i_src1, src2 += i_src2 )
78 if(width==2) continue;
81 if(width==4) continue;
86 if(width==8) continue;
99 #define PIXEL_AVG_C( name, width, height ) \
100 static void name( uint8_t *pix1, int i_stride_pix1, \
101 uint8_t *pix2, int i_stride_pix2, \
102 uint8_t *pix3, int i_stride_pix3, int weight ) \
105 pixel_avg_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, pix3, i_stride_pix3, width, height ); \
107 pixel_avg_weight_wxh( pix1, i_stride_pix1, pix2, i_stride_pix2, pix3, i_stride_pix3, width, height, weight ); \
109 PIXEL_AVG_C( pixel_avg_16x16, 16, 16 )
110 PIXEL_AVG_C( pixel_avg_16x8, 16, 8 )
111 PIXEL_AVG_C( pixel_avg_8x16, 8, 16 )
112 PIXEL_AVG_C( pixel_avg_8x8, 8, 8 )
113 PIXEL_AVG_C( pixel_avg_8x4, 8, 4 )
114 PIXEL_AVG_C( pixel_avg_4x8, 4, 8 )
115 PIXEL_AVG_C( pixel_avg_4x4, 4, 4 )
116 PIXEL_AVG_C( pixel_avg_4x2, 4, 2 )
117 PIXEL_AVG_C( pixel_avg_2x4, 2, 4 )
118 PIXEL_AVG_C( pixel_avg_2x2, 2, 2 )
120 static void mc_copy( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_width, int i_height )
124 for( y = 0; y < i_height; y++ )
126 memcpy( dst, src, i_width );
133 #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]))
134 static void hpel_filter( uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, uint8_t *src,
135 int stride, int width, int height, int16_t *buf )
138 for( y=0; y<height; y++ )
140 for( x=-2; x<width+3; x++ )
142 int v = TAPFILTER(src,stride);
143 dstv[x] = x264_clip_uint8((v + 16) >> 5);
146 for( x=0; x<width; x++ )
147 dstc[x] = x264_clip_uint8((TAPFILTER(buf+2,1) + 512) >> 10);
148 for( x=0; x<width; x++ )
149 dsth[x] = x264_clip_uint8((TAPFILTER(src,1) + 16) >> 5);
157 static const int hpel_ref0[16] = {0,1,1,1,0,1,1,1,2,3,3,3,0,1,1,1};
158 static const int hpel_ref1[16] = {0,0,0,0,2,2,3,2,2,2,3,2,2,2,3,2};
160 static void mc_luma( uint8_t *dst, int i_dst_stride,
161 uint8_t *src[4], int i_src_stride,
163 int i_width, int i_height )
165 int qpel_idx = ((mvy&3)<<2) + (mvx&3);
166 int offset = (mvy>>2)*i_src_stride + (mvx>>2);
167 uint8_t *src1 = src[hpel_ref0[qpel_idx]] + offset + ((mvy&3) == 3) * i_src_stride;
169 if( qpel_idx & 5 ) /* qpel interpolation needed */
171 uint8_t *src2 = src[hpel_ref1[qpel_idx]] + offset + ((mvx&3) == 3);
172 pixel_avg( dst, i_dst_stride, src1, i_src_stride,
173 src2, i_src_stride, i_width, i_height );
177 mc_copy( src1, i_src_stride, dst, i_dst_stride, i_width, i_height );
181 static uint8_t *get_ref( uint8_t *dst, int *i_dst_stride,
182 uint8_t *src[4], int i_src_stride,
184 int i_width, int i_height )
186 int qpel_idx = ((mvy&3)<<2) + (mvx&3);
187 int offset = (mvy>>2)*i_src_stride + (mvx>>2);
188 uint8_t *src1 = src[hpel_ref0[qpel_idx]] + offset + ((mvy&3) == 3) * i_src_stride;
190 if( qpel_idx & 5 ) /* qpel interpolation needed */
192 uint8_t *src2 = src[hpel_ref1[qpel_idx]] + offset + ((mvx&3) == 3);
193 pixel_avg( dst, *i_dst_stride, src1, i_src_stride,
194 src2, i_src_stride, i_width, i_height );
199 *i_dst_stride = i_src_stride;
204 /* full chroma mc (ie until 1/8 pixel)*/
205 static void mc_chroma( uint8_t *dst, int i_dst_stride,
206 uint8_t *src, int i_src_stride,
208 int i_width, int i_height )
213 const int d8x = mvx&0x07;
214 const int d8y = mvy&0x07;
216 const int cA = (8-d8x)*(8-d8y);
217 const int cB = d8x *(8-d8y);
218 const int cC = (8-d8x)*d8y;
219 const int cD = d8x *d8y;
221 src += (mvy >> 3) * i_src_stride + (mvx >> 3);
222 srcp = &src[i_src_stride];
224 for( y = 0; y < i_height; y++ )
226 for( x = 0; x < i_width; x++ )
228 dst[x] = ( cA*src[x] + cB*src[x+1] +
229 cC*srcp[x] + cD*srcp[x+1] + 32 ) >> 6;
234 srcp += i_src_stride;
239 static void mc_copy_w##W( uint8_t *dst, int i_dst, uint8_t *src, int i_src, int i_height ) \
241 mc_copy( src, i_src, dst, i_dst, W, i_height ); \
247 static void plane_copy( uint8_t *dst, int i_dst,
248 uint8_t *src, int i_src, int w, int h)
252 memcpy( dst, src, w );
258 static void prefetch_fenc_null( uint8_t *pix_y, int stride_y,
259 uint8_t *pix_uv, int stride_uv, int mb_x )
262 static void prefetch_ref_null( uint8_t *pix, int stride, int parity )
265 static void memzero_aligned( void * dst, int n )
270 static void integral_init4h( uint16_t *sum, uint8_t *pix, int stride )
272 int x, v = pix[0]+pix[1]+pix[2]+pix[3];
273 for( x=0; x<stride-4; x++ )
275 sum[x] = v + sum[x-stride];
276 v += pix[x+4] - pix[x];
280 static void integral_init8h( uint16_t *sum, uint8_t *pix, int stride )
282 int x, v = pix[0]+pix[1]+pix[2]+pix[3]+pix[4]+pix[5]+pix[6]+pix[7];
283 for( x=0; x<stride-8; x++ )
285 sum[x] = v + sum[x-stride];
286 v += pix[x+8] - pix[x];
290 static void integral_init4v( uint16_t *sum8, uint16_t *sum4, int stride )
293 for( x=0; x<stride-8; x++ )
294 sum4[x] = sum8[x+4*stride] - sum8[x];
295 for( x=0; x<stride-8; x++ )
296 sum8[x] = sum8[x+8*stride] + sum8[x+8*stride+4] - sum8[x] - sum8[x+4];
299 static void integral_init8v( uint16_t *sum8, int stride )
302 for( x=0; x<stride-8; x++ )
303 sum8[x] = sum8[x+8*stride] - sum8[x];
306 void x264_frame_init_lowres( x264_t *h, x264_frame_t *frame )
308 uint8_t *src = frame->plane[0];
309 int i_stride = frame->i_stride[0];
310 int i_height = frame->i_lines[0];
311 int i_width = frame->i_width[0];
314 // duplicate last row and column so that their interpolation doesn't have to be special-cased
315 for( y=0; y<i_height; y++ )
316 src[i_width+y*i_stride] = src[i_width-1+y*i_stride];
317 memcpy( src+i_stride*i_height, src+i_stride*(i_height-1), i_width );
318 h->mc.frame_init_lowres_core( src, frame->lowres[0], frame->lowres[1], frame->lowres[2], frame->lowres[3],
319 i_stride, frame->i_stride_lowres, frame->i_width_lowres, frame->i_lines_lowres );
320 x264_frame_expand_border_lowres( frame );
322 memset( frame->i_cost_est, -1, sizeof(frame->i_cost_est) );
324 for( x = 0; x < h->param.i_bframe + 2; x++ )
325 for( y = 0; y < h->param.i_bframe + 2; y++ )
326 frame->i_row_satds[y][x][0] = -1;
328 for( y = 0; y <= !!h->param.i_bframe; y++ )
329 for( x = 0; x <= h->param.i_bframe; x++ )
330 frame->lowres_mvs[y][x][0][0] = 0x7FFF;
333 static void frame_init_lowres_core( uint8_t *src0, uint8_t *dst0, uint8_t *dsth, uint8_t *dstv, uint8_t *dstc,
334 int src_stride, int dst_stride, int width, int height )
337 for( y=0; y<height; y++ )
339 uint8_t *src1 = src0+src_stride;
340 uint8_t *src2 = src1+src_stride;
341 for( x=0; x<width; x++ )
343 // slower than naive bilinear, but matches asm
344 #define FILTER(a,b,c,d) ((((a+b+1)>>1)+((c+d+1)>>1)+1)>>1)
345 dst0[x] = FILTER(src0[2*x ], src1[2*x ], src0[2*x+1], src1[2*x+1]);
346 dsth[x] = FILTER(src0[2*x+1], src1[2*x+1], src0[2*x+2], src1[2*x+2]);
347 dstv[x] = FILTER(src1[2*x ], src2[2*x ], src1[2*x+1], src2[2*x+1]);
348 dstc[x] = FILTER(src1[2*x+1], src2[2*x+1], src1[2*x+2], src2[2*x+2]);
351 src0 += src_stride*2;
359 #if defined(__GNUC__) && (defined(ARCH_X86) || defined(ARCH_X86_64))
360 // gcc isn't smart enough to use the "idiv" instruction
361 static ALWAYS_INLINE int32_t div_64_32(int64_t x, int32_t y) {
362 int32_t quotient, remainder;
364 :"=a"(quotient), "=d"(remainder)
365 :"a"((uint32_t)x), "d"((int32_t)(x>>32)), "r"(y)
370 #define div_64_32(x,y) ((x)/(y))
373 /* Estimate the total amount of influence on future quality that could be had if we
374 * were to improve the reference samples used to inter predict any given macroblock. */
375 static void mbtree_propagate_cost( int *dst, uint16_t *propagate_in, uint16_t *intra_costs,
376 uint16_t *inter_costs, uint16_t *inv_qscales, int len )
379 for( i=0; i<len; i++ )
381 int propagate_amount = propagate_in[i] + ((intra_costs[i] * inv_qscales[i] + 128)>>8);
382 dst[i] = div_64_32((int64_t)propagate_amount * (intra_costs[i] - inter_costs[i]), intra_costs[i]);
386 void x264_mc_init( int cpu, x264_mc_functions_t *pf )
388 pf->mc_luma = mc_luma;
389 pf->get_ref = get_ref;
390 pf->mc_chroma = mc_chroma;
392 pf->avg[PIXEL_16x16]= pixel_avg_16x16;
393 pf->avg[PIXEL_16x8] = pixel_avg_16x8;
394 pf->avg[PIXEL_8x16] = pixel_avg_8x16;
395 pf->avg[PIXEL_8x8] = pixel_avg_8x8;
396 pf->avg[PIXEL_8x4] = pixel_avg_8x4;
397 pf->avg[PIXEL_4x8] = pixel_avg_4x8;
398 pf->avg[PIXEL_4x4] = pixel_avg_4x4;
399 pf->avg[PIXEL_4x2] = pixel_avg_4x2;
400 pf->avg[PIXEL_2x4] = pixel_avg_2x4;
401 pf->avg[PIXEL_2x2] = pixel_avg_2x2;
403 pf->copy_16x16_unaligned = mc_copy_w16;
404 pf->copy[PIXEL_16x16] = mc_copy_w16;
405 pf->copy[PIXEL_8x8] = mc_copy_w8;
406 pf->copy[PIXEL_4x4] = mc_copy_w4;
408 pf->plane_copy = plane_copy;
409 pf->hpel_filter = hpel_filter;
411 pf->prefetch_fenc = prefetch_fenc_null;
412 pf->prefetch_ref = prefetch_ref_null;
413 pf->memcpy_aligned = memcpy;
414 pf->memzero_aligned = memzero_aligned;
415 pf->frame_init_lowres_core = frame_init_lowres_core;
417 pf->integral_init4h = integral_init4h;
418 pf->integral_init8h = integral_init8h;
419 pf->integral_init4v = integral_init4v;
420 pf->integral_init8v = integral_init8v;
422 pf->mbtree_propagate_cost = mbtree_propagate_cost;
425 x264_mc_init_mmx( cpu, pf );
428 if( cpu&X264_CPU_ALTIVEC )
429 x264_mc_altivec_init( pf );
433 void x264_frame_filter( x264_t *h, x264_frame_t *frame, int mb_y, int b_end )
435 const int b_interlaced = h->sh.b_mbaff;
436 const int stride = frame->i_stride[0] << b_interlaced;
437 const int width = frame->i_width[0];
438 int start = (mb_y*16 >> b_interlaced) - 8; // buffer = 4 for deblock + 3 for 6tap, rounded to 8
439 int height = ((b_end ? frame->i_lines[0] : mb_y*16) >> b_interlaced) + 8;
440 int offs = start*stride - 8; // buffer = 3 for 6tap, aligned to 8 for simd
443 if( mb_y & b_interlaced )
446 for( y=0; y<=b_interlaced; y++, offs+=frame->i_stride[0] )
449 frame->filtered[1] + offs,
450 frame->filtered[2] + offs,
451 frame->filtered[3] + offs,
452 frame->plane[0] + offs,
453 stride, width + 16, height - start,
457 /* generate integral image:
458 * frame->integral contains 2 planes. in the upper plane, each element is
459 * the sum of an 8x8 pixel region with top-left corner on that point.
460 * in the lower plane, 4x4 sums (needed only with --partitions p4x4). */
462 if( frame->integral )
466 memset( frame->integral - PADV * stride - PADH, 0, stride * sizeof(uint16_t) );
471 for( y = start; y < height; y++ )
473 uint8_t *pix = frame->plane[0] + y * stride - PADH;
474 uint16_t *sum8 = frame->integral + (y+1) * stride - PADH;
476 if( h->frames.b_have_sub8x8_esa )
478 h->mc.integral_init4h( sum8, pix, stride );
480 sum4 = sum8 + stride * (frame->i_lines[0] + PADV*2);
482 h->mc.integral_init4v( sum8, sum4, stride );
486 h->mc.integral_init8h( sum8, pix, stride );
488 h->mc.integral_init8v( sum8-8*stride, stride );