2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/intmath.h"
22 #include "libavutil/log.h"
23 #include "libavutil/opt.h"
30 #include "rangecoder.h"
33 #include "mpegvideo.h"
36 static av_cold int encode_init(AVCodecContext *avctx)
38 SnowContext *s = avctx->priv_data;
41 if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
42 av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
43 "Use vstrict=-2 / -strict -2 to use it anyway.\n");
47 if(avctx->prediction_method == DWT_97
48 && (avctx->flags & CODEC_FLAG_QSCALE)
49 && avctx->global_quality == 0){
50 av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
54 s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
56 s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
57 s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
59 for(plane_index=0; plane_index<3; plane_index++){
60 s->plane[plane_index].diag_mc= 1;
61 s->plane[plane_index].htaps= 6;
62 s->plane[plane_index].hcoeff[0]= 40;
63 s->plane[plane_index].hcoeff[1]= -10;
64 s->plane[plane_index].hcoeff[2]= 2;
65 s->plane[plane_index].fast_mc= 1;
68 if ((ret = ff_snow_common_init(avctx)) < 0) {
69 ff_snow_common_end(avctx->priv_data);
72 ff_snow_alloc_blocks(s);
77 s->m.flags = avctx->flags;
78 s->m.bit_rate= avctx->bit_rate;
81 s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
82 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
83 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
84 s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
85 if (!s->m.me.scratchpad || !s->m.me.map || !s->m.me.score_map || !s->m.obmc_scratchpad)
86 return AVERROR(ENOMEM);
88 ff_h263_encode_init(&s->m); //mv_penalty
90 s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
92 if(avctx->flags&CODEC_FLAG_PASS1){
94 avctx->stats_out = av_mallocz(256);
96 if (!avctx->stats_out)
97 return AVERROR(ENOMEM);
99 if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
100 if(ff_rate_control_init(&s->m) < 0)
103 s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
105 switch(avctx->pix_fmt){
106 case AV_PIX_FMT_YUV444P:
107 // case AV_PIX_FMT_YUV422P:
108 case AV_PIX_FMT_YUV420P:
109 // case AV_PIX_FMT_YUV411P:
110 case AV_PIX_FMT_YUV410P:
112 s->colorspace_type= 0;
114 case AV_PIX_FMT_GRAY8:
116 s->colorspace_type = 1;
118 /* case AV_PIX_FMT_RGB32:
122 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
125 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
127 ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
128 ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
130 s->input_picture = av_frame_alloc();
131 if (!s->input_picture)
132 return AVERROR(ENOMEM);
133 if ((ret = ff_get_buffer(s->avctx, s->input_picture, AV_GET_BUFFER_FLAG_REF)) < 0)
136 if(s->avctx->me_method == ME_ITER){
138 int size= s->b_width * s->b_height << 2*s->block_max_depth;
139 for(i=0; i<s->max_ref_frames; i++){
140 s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
141 s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
142 if (!s->ref_mvs[i] || !s->ref_scores[i])
143 return AVERROR(ENOMEM);
150 //near copy & paste from dsputil, FIXME
151 static int pix_sum(uint8_t * pix, int line_size, int w, int h)
156 for (i = 0; i < h; i++) {
157 for (j = 0; j < w; j++) {
161 pix += line_size - w;
166 //near copy & paste from dsputil, FIXME
167 static int pix_norm1(uint8_t * pix, int line_size, int w)
170 uint32_t *sq = ff_squareTbl + 256;
173 for (i = 0; i < w; i++) {
174 for (j = 0; j < w; j ++) {
178 pix += line_size - w;
183 static inline int get_penalty_factor(int lambda, int lambda2, int type){
187 return lambda>>FF_LAMBDA_SHIFT;
189 return (3*lambda)>>(FF_LAMBDA_SHIFT+1);
191 return (4*lambda)>>(FF_LAMBDA_SHIFT);
193 return (2*lambda)>>(FF_LAMBDA_SHIFT);
196 return (2*lambda)>>FF_LAMBDA_SHIFT;
201 return lambda2>>FF_LAMBDA_SHIFT;
210 #define P_TOPRIGHT P[3]
211 #define P_MEDIAN P[4]
213 #define FLAG_QPEL 1 //must be 1
215 static int encode_q_branch(SnowContext *s, int level, int x, int y){
216 uint8_t p_buffer[1024];
217 uint8_t i_buffer[1024];
218 uint8_t p_state[sizeof(s->block_state)];
219 uint8_t i_state[sizeof(s->block_state)];
221 uint8_t *pbbak= s->c.bytestream;
222 uint8_t *pbbak_start= s->c.bytestream_start;
223 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
224 const int w= s->b_width << s->block_max_depth;
225 const int h= s->b_height << s->block_max_depth;
226 const int rem_depth= s->block_max_depth - level;
227 const int index= (x + y*w) << rem_depth;
228 const int block_w= 1<<(LOG2_MB_SIZE - level);
229 int trx= (x+1)<<rem_depth;
230 int try= (y+1)<<rem_depth;
231 const BlockNode *left = x ? &s->block[index-1] : &null_block;
232 const BlockNode *top = y ? &s->block[index-w] : &null_block;
233 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
234 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
235 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
236 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
237 int pl = left->color[0];
238 int pcb= left->color[1];
239 int pcr= left->color[2];
243 const int stride= s->current_picture->linesize[0];
244 const int uvstride= s->current_picture->linesize[1];
245 uint8_t *current_data[3]= { s->input_picture->data[0] + (x + y* stride)*block_w,
246 s->input_picture->data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
247 s->input_picture->data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
249 int16_t last_mv[3][2];
250 int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
251 const int shift= 1+qpel;
252 MotionEstContext *c= &s->m.me;
253 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
254 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
255 int my_context= av_log2(2*FFABS(left->my - top->my));
256 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
257 int ref, best_ref, ref_score, ref_mx, ref_my;
259 av_assert0(sizeof(s->block_state) >= 256);
261 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
265 // clip predictors / edge ?
271 P_TOPRIGHT[0]= tr->mx;
272 P_TOPRIGHT[1]= tr->my;
274 last_mv[0][0]= s->block[index].mx;
275 last_mv[0][1]= s->block[index].my;
276 last_mv[1][0]= right->mx;
277 last_mv[1][1]= right->my;
278 last_mv[2][0]= bottom->mx;
279 last_mv[2][1]= bottom->my;
286 av_assert1(c-> stride == stride);
287 av_assert1(c->uvstride == uvstride);
289 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
290 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
291 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
292 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
294 c->xmin = - x*block_w - 16+3;
295 c->ymin = - y*block_w - 16+3;
296 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
297 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
299 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
300 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
301 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
302 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
303 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
304 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
305 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
307 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
308 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
311 c->pred_x= P_LEFT[0];
312 c->pred_y= P_LEFT[1];
314 c->pred_x = P_MEDIAN[0];
315 c->pred_y = P_MEDIAN[1];
320 for(ref=0; ref<s->ref_frames; ref++){
321 init_ref(c, current_data, s->last_picture[ref]->data, NULL, block_w*x, block_w*y, 0);
323 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
324 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
326 av_assert2(ref_mx >= c->xmin);
327 av_assert2(ref_mx <= c->xmax);
328 av_assert2(ref_my >= c->ymin);
329 av_assert2(ref_my <= c->ymax);
331 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
332 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
333 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
335 s->ref_mvs[ref][index][0]= ref_mx;
336 s->ref_mvs[ref][index][1]= ref_my;
337 s->ref_scores[ref][index]= ref_score;
339 if(score > ref_score){
346 //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
349 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
352 pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
353 memcpy(p_state, s->block_state, sizeof(s->block_state));
355 if(level!=s->block_max_depth)
356 put_rac(&pc, &p_state[4 + s_context], 1);
357 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
358 if(s->ref_frames > 1)
359 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
360 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
361 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
362 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
363 p_len= pc.bytestream - pc.bytestream_start;
364 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
366 block_s= block_w*block_w;
367 sum = pix_sum(current_data[0], stride, block_w, block_w);
368 l= (sum + block_s/2)/block_s;
369 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
371 if (s->nb_planes > 2) {
372 block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
373 sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
374 cb= (sum + block_s/2)/block_s;
375 // iscore += pix_norm1(¤t_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
376 sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
377 cr= (sum + block_s/2)/block_s;
378 // iscore += pix_norm1(¤t_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
384 ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
385 memcpy(i_state, s->block_state, sizeof(s->block_state));
386 if(level!=s->block_max_depth)
387 put_rac(&ic, &i_state[4 + s_context], 1);
388 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
389 put_symbol(&ic, &i_state[32], l-pl , 1);
390 if (s->nb_planes > 2) {
391 put_symbol(&ic, &i_state[64], cb-pcb, 1);
392 put_symbol(&ic, &i_state[96], cr-pcr, 1);
394 i_len= ic.bytestream - ic.bytestream_start;
395 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
397 // assert(score==256*256*256*64-1);
398 av_assert1(iscore < 255*255*256 + s->lambda2*10);
399 av_assert1(iscore >= 0);
400 av_assert1(l>=0 && l<=255);
401 av_assert1(pl>=0 && pl<=255);
404 int varc= iscore >> 8;
405 int vard= score >> 8;
406 if (vard <= 64 || vard < varc)
407 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
409 c->scene_change_score+= s->m.qscale;
412 if(level!=s->block_max_depth){
413 put_rac(&s->c, &s->block_state[4 + s_context], 0);
414 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
415 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
416 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
417 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
418 score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
420 if(score2 < score && score2 < iscore)
425 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
426 memcpy(pbbak, i_buffer, i_len);
428 s->c.bytestream_start= pbbak_start;
429 s->c.bytestream= pbbak + i_len;
430 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
431 memcpy(s->block_state, i_state, sizeof(s->block_state));
434 memcpy(pbbak, p_buffer, p_len);
436 s->c.bytestream_start= pbbak_start;
437 s->c.bytestream= pbbak + p_len;
438 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
439 memcpy(s->block_state, p_state, sizeof(s->block_state));
444 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
445 const int w= s->b_width << s->block_max_depth;
446 const int rem_depth= s->block_max_depth - level;
447 const int index= (x + y*w) << rem_depth;
448 int trx= (x+1)<<rem_depth;
449 BlockNode *b= &s->block[index];
450 const BlockNode *left = x ? &s->block[index-1] : &null_block;
451 const BlockNode *top = y ? &s->block[index-w] : &null_block;
452 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
453 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
454 int pl = left->color[0];
455 int pcb= left->color[1];
456 int pcr= left->color[2];
458 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
459 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
460 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
461 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
464 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
468 if(level!=s->block_max_depth){
469 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
470 put_rac(&s->c, &s->block_state[4 + s_context], 1);
472 put_rac(&s->c, &s->block_state[4 + s_context], 0);
473 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
474 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
475 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
476 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
480 if(b->type & BLOCK_INTRA){
481 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
482 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
483 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
484 if (s->nb_planes > 2) {
485 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
486 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
488 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
490 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
491 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
492 if(s->ref_frames > 1)
493 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
494 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
495 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
496 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
500 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
502 Plane *p= &s->plane[plane_index];
503 const int block_size = MB_SIZE >> s->block_max_depth;
504 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
505 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
506 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
507 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
508 const int ref_stride= s->current_picture->linesize[plane_index];
509 uint8_t *src= s-> input_picture->data[plane_index];
510 IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
511 const int b_stride = s->b_width << s->block_max_depth;
512 const int w= p->width;
513 const int h= p->height;
514 int index= mb_x + mb_y*b_stride;
515 BlockNode *b= &s->block[index];
516 BlockNode backup= *b;
520 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
522 b->type|= BLOCK_INTRA;
523 b->color[plane_index]= 0;
524 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
527 int mb_x2= mb_x + (i &1) - 1;
528 int mb_y2= mb_y + (i>>1) - 1;
529 int x= block_w*mb_x2 + block_w/2;
530 int y= block_h*mb_y2 + block_h/2;
532 add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
533 x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
535 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
536 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
537 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
538 int obmc_v= obmc[index];
540 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
541 if(x<0) obmc_v += obmc[index + block_w];
542 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
543 if(x+block_w>w) obmc_v += obmc[index - block_w];
544 //FIXME precalculate this or simplify it somehow else
546 d = -dst[index] + (1<<(FRAC_BITS-1));
548 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
549 aa += obmc_v * obmc_v; //FIXME precalculate this
555 return av_clip( ROUNDED_DIV(ab<<LOG2_OBMC_MAX, aa), 0, 255); //FIXME we should not need clipping
558 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
559 const int b_stride = s->b_width << s->block_max_depth;
560 const int b_height = s->b_height<< s->block_max_depth;
561 int index= x + y*b_stride;
562 const BlockNode *b = &s->block[index];
563 const BlockNode *left = x ? &s->block[index-1] : &null_block;
564 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
565 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
566 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
568 // int mx_context= av_log2(2*FFABS(left->mx - top->mx));
569 // int my_context= av_log2(2*FFABS(left->my - top->my));
571 if(x<0 || x>=b_stride || y>=b_height)
580 //FIXME try accurate rate
581 //FIXME intra and inter predictors if surrounding blocks are not the same type
582 if(b->type & BLOCK_INTRA){
583 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
584 + av_log2(2*FFABS(left->color[1] - b->color[1]))
585 + av_log2(2*FFABS(left->color[2] - b->color[2])));
587 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
590 return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
591 + av_log2(2*FFABS(dmy))
592 + av_log2(2*b->ref));
596 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){
597 Plane *p= &s->plane[plane_index];
598 const int block_size = MB_SIZE >> s->block_max_depth;
599 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
600 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
601 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
602 const int ref_stride= s->current_picture->linesize[plane_index];
603 uint8_t *dst= s->current_picture->data[plane_index];
604 uint8_t *src= s-> input_picture->data[plane_index];
605 IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
606 uint8_t *cur = s->scratchbuf;
607 uint8_t *tmp = s->emu_edge_buffer;
608 const int b_stride = s->b_width << s->block_max_depth;
609 const int b_height = s->b_height<< s->block_max_depth;
610 const int w= p->width;
611 const int h= p->height;
614 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
615 int sx= block_w*mb_x - block_w/2;
616 int sy= block_h*mb_y - block_h/2;
617 int x0= FFMAX(0,-sx);
618 int y0= FFMAX(0,-sy);
619 int x1= FFMIN(block_w*2, w-sx);
620 int y1= FFMIN(block_h*2, h-sy);
623 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
625 ff_snow_pred_block(s, cur, tmp, ref_stride, sx, sy, block_w*2, block_h*2, &s->block[mb_x + mb_y*b_stride], plane_index, w, h);
627 for(y=y0; y<y1; y++){
628 const uint8_t *obmc1= obmc_edged[y];
629 const IDWTELEM *pred1 = pred + y*obmc_stride;
630 uint8_t *cur1 = cur + y*ref_stride;
631 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
632 for(x=x0; x<x1; x++){
633 #if FRAC_BITS >= LOG2_OBMC_MAX
634 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
636 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
638 v = (v + pred1[x]) >> FRAC_BITS;
639 if(v&(~255)) v= ~(v>>31);
644 /* copy the regions where obmc[] = (uint8_t)256 */
645 if(LOG2_OBMC_MAX == 8
646 && (mb_x == 0 || mb_x == b_stride-1)
647 && (mb_y == 0 || mb_y == b_height-1)){
657 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
661 /* FIXME rearrange dsputil to fit 32x32 cmp functions */
662 /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
663 /* FIXME cmps overlap but do not cover the wavelet's whole support.
664 * So improving the score of one block is not strictly guaranteed
665 * to improve the score of the whole frame, thus iterative motion
666 * estimation does not always converge. */
667 if(s->avctx->me_cmp == FF_CMP_W97)
668 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
669 else if(s->avctx->me_cmp == FF_CMP_W53)
670 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
674 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
675 distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
679 av_assert2(block_w==8);
680 distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
689 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
691 if(mb_x == b_stride-2)
692 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
694 return distortion + rate*penalty_factor;
697 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
699 Plane *p= &s->plane[plane_index];
700 const int block_size = MB_SIZE >> s->block_max_depth;
701 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
702 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
703 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
704 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
705 const int ref_stride= s->current_picture->linesize[plane_index];
706 uint8_t *dst= s->current_picture->data[plane_index];
707 uint8_t *src= s-> input_picture->data[plane_index];
708 //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
709 // const has only been removed from zero_dst to suppress a warning
710 static IDWTELEM zero_dst[4096]; //FIXME
711 const int b_stride = s->b_width << s->block_max_depth;
712 const int w= p->width;
713 const int h= p->height;
716 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
718 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
721 int mb_x2= mb_x + (i%3) - 1;
722 int mb_y2= mb_y + (i/3) - 1;
723 int x= block_w*mb_x2 + block_w/2;
724 int y= block_h*mb_y2 + block_h/2;
726 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
727 x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
729 //FIXME find a cleaner/simpler way to skip the outside stuff
730 for(y2= y; y2<0; y2++)
731 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
732 for(y2= h; y2<y+block_h; y2++)
733 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
735 for(y2= y; y2<y+block_h; y2++)
736 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
739 for(y2= y; y2<y+block_h; y2++)
740 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
743 av_assert1(block_w== 8 || block_w==16);
744 distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
748 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
749 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
757 rate = get_block_bits(s, mb_x, mb_y, 2);
758 for(i=merged?4:0; i<9; i++){
759 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
760 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
763 return distortion + rate*penalty_factor;
766 static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
767 const int w= b->width;
768 const int h= b->height;
773 int *runs = s->run_buffer;
780 int /*ll=0, */l=0, lt=0, t=0, rt=0;
781 v= src[x + y*stride];
784 t= src[x + (y-1)*stride];
786 lt= src[x - 1 + (y-1)*stride];
789 rt= src[x + 1 + (y-1)*stride];
793 l= src[x - 1 + y*stride];
795 if(orientation==1) ll= src[y + (x-2)*stride];
796 else ll= src[x - 2 + y*stride];
802 if(px<b->parent->width && py<b->parent->height)
803 p= parent[px + py*2*stride];
805 if(!(/*ll|*/l|lt|t|rt|p)){
807 runs[run_index++]= run;
815 max_index= run_index;
816 runs[run_index++]= run;
818 run= runs[run_index++];
820 put_symbol2(&s->c, b->state[30], max_index, 0);
821 if(run_index <= max_index)
822 put_symbol2(&s->c, b->state[1], run, 3);
825 if(s->c.bytestream_end - s->c.bytestream < w*40){
826 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
831 int /*ll=0, */l=0, lt=0, t=0, rt=0;
832 v= src[x + y*stride];
835 t= src[x + (y-1)*stride];
837 lt= src[x - 1 + (y-1)*stride];
840 rt= src[x + 1 + (y-1)*stride];
844 l= src[x - 1 + y*stride];
846 if(orientation==1) ll= src[y + (x-2)*stride];
847 else ll= src[x - 2 + y*stride];
853 if(px<b->parent->width && py<b->parent->height)
854 p= parent[px + py*2*stride];
856 if(/*ll|*/l|lt|t|rt|p){
857 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
859 put_rac(&s->c, &b->state[0][context], !!v);
862 run= runs[run_index++];
864 if(run_index <= max_index)
865 put_symbol2(&s->c, b->state[1], run, 3);
873 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
874 int l2= 2*FFABS(l) + (l<0);
875 int t2= 2*FFABS(t) + (t<0);
877 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
878 put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
886 static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
887 // encode_subband_qtree(s, b, src, parent, stride, orientation);
888 // encode_subband_z0run(s, b, src, parent, stride, orientation);
889 return encode_subband_c0run(s, b, src, parent, stride, orientation);
890 // encode_subband_dzr(s, b, src, parent, stride, orientation);
893 static av_always_inline int check_block(SnowContext *s, int mb_x, int mb_y, int p[3], int intra, uint8_t (*obmc_edged)[MB_SIZE * 2], int *best_rd){
894 const int b_stride= s->b_width << s->block_max_depth;
895 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
896 BlockNode backup= *block;
900 av_assert2(mb_x>=0 && mb_y>=0);
901 av_assert2(mb_x<b_stride);
904 block->color[0] = p[0];
905 block->color[1] = p[1];
906 block->color[2] = p[2];
907 block->type |= BLOCK_INTRA;
909 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
910 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
911 if(s->me_cache[index] == value)
913 s->me_cache[index]= value;
917 block->type &= ~BLOCK_INTRA;
920 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
932 /* special case for int[2] args we discard afterwards,
933 * fixes compilation problem with gcc 2.95 */
934 static av_always_inline int check_block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, uint8_t (*obmc_edged)[MB_SIZE * 2], int *best_rd){
936 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
939 static av_always_inline int check_4block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, int ref, int *best_rd){
940 const int b_stride= s->b_width << s->block_max_depth;
941 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
946 /* We don't initialize backup[] during variable declaration, because
947 * that fails to compile on MSVC: "cannot convert from 'BlockNode' to
949 backup[0] = block[0];
950 backup[1] = block[1];
951 backup[2] = block[b_stride];
952 backup[3] = block[b_stride + 1];
954 av_assert2(mb_x>=0 && mb_y>=0);
955 av_assert2(mb_x<b_stride);
956 av_assert2(((mb_x|mb_y)&1) == 0);
958 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
959 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
960 if(s->me_cache[index] == value)
962 s->me_cache[index]= value;
967 block->type &= ~BLOCK_INTRA;
968 block[1]= block[b_stride]= block[b_stride+1]= *block;
970 rd= get_4block_rd(s, mb_x, mb_y, 0);
979 block[b_stride]= backup[2];
980 block[b_stride+1]= backup[3];
985 static void iterative_me(SnowContext *s){
986 int pass, mb_x, mb_y;
987 const int b_width = s->b_width << s->block_max_depth;
988 const int b_height= s->b_height << s->block_max_depth;
989 const int b_stride= b_width;
994 uint8_t state[sizeof(s->block_state)];
995 memcpy(state, s->block_state, sizeof(s->block_state));
996 for(mb_y= 0; mb_y<s->b_height; mb_y++)
997 for(mb_x= 0; mb_x<s->b_width; mb_x++)
998 encode_q_branch(s, 0, mb_x, mb_y);
1000 memcpy(s->block_state, state, sizeof(s->block_state));
1003 for(pass=0; pass<25; pass++){
1006 for(mb_y= 0; mb_y<b_height; mb_y++){
1007 for(mb_x= 0; mb_x<b_width; mb_x++){
1008 int dia_change, i, j, ref;
1009 int best_rd= INT_MAX, ref_rd;
1010 BlockNode backup, ref_b;
1011 const int index= mb_x + mb_y * b_stride;
1012 BlockNode *block= &s->block[index];
1013 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
1014 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
1015 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
1016 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
1017 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
1018 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
1019 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1020 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1021 const int b_w= (MB_SIZE >> s->block_max_depth);
1022 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
1024 if(pass && (block->type & BLOCK_OPT))
1026 block->type |= BLOCK_OPT;
1030 if(!s->me_cache_generation)
1031 memset(s->me_cache, 0, sizeof(s->me_cache));
1032 s->me_cache_generation += 1<<22;
1034 //FIXME precalculate
1037 for (y = 0; y < b_w * 2; y++)
1038 memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
1040 for(y=0; y<b_w*2; y++)
1041 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1042 if(mb_x==b_stride-1)
1043 for(y=0; y<b_w*2; y++)
1044 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1046 for(x=0; x<b_w*2; x++)
1047 obmc_edged[0][x] += obmc_edged[b_w-1][x];
1048 for(y=1; y<b_w; y++)
1049 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1051 if(mb_y==b_height-1){
1052 for(x=0; x<b_w*2; x++)
1053 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1054 for(y=b_w; y<b_w*2-1; y++)
1055 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1059 //skip stuff outside the picture
1060 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1061 uint8_t *src= s-> input_picture->data[0];
1062 uint8_t *dst= s->current_picture->data[0];
1063 const int stride= s->current_picture->linesize[0];
1064 const int block_w= MB_SIZE >> s->block_max_depth;
1065 const int block_h= MB_SIZE >> s->block_max_depth;
1066 const int sx= block_w*mb_x - block_w/2;
1067 const int sy= block_h*mb_y - block_h/2;
1068 const int w= s->plane[0].width;
1069 const int h= s->plane[0].height;
1073 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1074 for(y=h; y<sy+block_h*2; y++)
1075 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1077 for(y=sy; y<sy+block_h*2; y++)
1078 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1080 if(sx+block_w*2 > w){
1081 for(y=sy; y<sy+block_h*2; y++)
1082 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1086 // intra(black) = neighbors' contribution to the current block
1087 for(i=0; i < s->nb_planes; i++)
1088 color[i]= get_dc(s, mb_x, mb_y, i);
1090 // get previous score (cannot be cached due to OBMC)
1091 if(pass > 0 && (block->type&BLOCK_INTRA)){
1092 int color0[3]= {block->color[0], block->color[1], block->color[2]};
1093 check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);
1095 check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
1099 for(ref=0; ref < s->ref_frames; ref++){
1100 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1101 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1106 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
1107 check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
1109 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
1111 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);
1113 check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);
1115 check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
1118 //FIXME avoid subpel interpolation / round to nearest integer
1121 for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
1123 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1124 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1125 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1126 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1132 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1135 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
1137 //FIXME or try the standard 2 pass qpel or similar
1139 mvr[0][0]= block->mx;
1140 mvr[0][1]= block->my;
1141 if(ref_rd > best_rd){
1148 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);
1149 //FIXME RD style color selection
1150 if(!same_block(block, &backup)){
1151 if(tb ) tb ->type &= ~BLOCK_OPT;
1152 if(lb ) lb ->type &= ~BLOCK_OPT;
1153 if(rb ) rb ->type &= ~BLOCK_OPT;
1154 if(bb ) bb ->type &= ~BLOCK_OPT;
1155 if(tlb) tlb->type &= ~BLOCK_OPT;
1156 if(trb) trb->type &= ~BLOCK_OPT;
1157 if(blb) blb->type &= ~BLOCK_OPT;
1158 if(brb) brb->type &= ~BLOCK_OPT;
1163 av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
1168 if(s->block_max_depth == 1){
1170 for(mb_y= 0; mb_y<b_height; mb_y+=2){
1171 for(mb_x= 0; mb_x<b_width; mb_x+=2){
1173 int best_rd, init_rd;
1174 const int index= mb_x + mb_y * b_stride;
1177 b[0]= &s->block[index];
1179 b[2]= b[0]+b_stride;
1181 if(same_block(b[0], b[1]) &&
1182 same_block(b[0], b[2]) &&
1183 same_block(b[0], b[3]))
1186 if(!s->me_cache_generation)
1187 memset(s->me_cache, 0, sizeof(s->me_cache));
1188 s->me_cache_generation += 1<<22;
1190 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1192 //FIXME more multiref search?
1193 check_4block_inter(s, mb_x, mb_y,
1194 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1195 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1198 if(!(b[i]->type&BLOCK_INTRA))
1199 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1201 if(init_rd != best_rd)
1205 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1209 static void encode_blocks(SnowContext *s, int search){
1214 if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
1218 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1219 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1223 if(s->avctx->me_method == ME_ITER || !search)
1224 encode_q_branch2(s, 0, x, y);
1226 encode_q_branch (s, 0, x, y);
1231 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1232 const int w= b->width;
1233 const int h= b->height;
1234 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1235 const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1236 int x,y, thres1, thres2;
1238 if(s->qlog == LOSSLESS_QLOG){
1241 dst[x + y*stride]= src[x + y*stride];
1245 bias= bias ? 0 : (3*qmul)>>3;
1246 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1252 int i= src[x + y*stride];
1254 if((unsigned)(i+thres1) > thres2){
1257 i/= qmul; //FIXME optimize
1258 dst[x + y*stride]= i;
1262 i/= qmul; //FIXME optimize
1263 dst[x + y*stride]= -i;
1266 dst[x + y*stride]= 0;
1272 int i= src[x + y*stride];
1274 if((unsigned)(i+thres1) > thres2){
1277 i= (i + bias) / qmul; //FIXME optimize
1278 dst[x + y*stride]= i;
1282 i= (i + bias) / qmul; //FIXME optimize
1283 dst[x + y*stride]= -i;
1286 dst[x + y*stride]= 0;
1292 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1293 const int w= b->width;
1294 const int h= b->height;
1295 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1296 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1297 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1300 if(s->qlog == LOSSLESS_QLOG) return;
1304 int i= src[x + y*stride];
1306 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1308 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1314 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1315 const int w= b->width;
1316 const int h= b->height;
1319 for(y=h-1; y>=0; y--){
1320 for(x=w-1; x>=0; x--){
1321 int i= x + y*stride;
1325 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1326 else src[i] -= src[i - 1];
1328 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1329 else src[i] -= src[i - 1];
1332 if(y) src[i] -= src[i - stride];
1338 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1339 const int w= b->width;
1340 const int h= b->height;
1345 int i= x + y*stride;
1349 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1350 else src[i] += src[i - 1];
1352 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1353 else src[i] += src[i - 1];
1356 if(y) src[i] += src[i - stride];
1362 static void encode_qlogs(SnowContext *s){
1363 int plane_index, level, orientation;
1365 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1366 for(level=0; level<s->spatial_decomposition_count; level++){
1367 for(orientation=level ? 1:0; orientation<4; orientation++){
1368 if(orientation==2) continue;
1369 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1375 static void encode_header(SnowContext *s){
1379 memset(kstate, MID_STATE, sizeof(kstate));
1381 put_rac(&s->c, kstate, s->keyframe);
1382 if(s->keyframe || s->always_reset){
1383 ff_snow_reset_contexts(s);
1384 s->last_spatial_decomposition_type=
1388 s->last_block_max_depth= 0;
1389 for(plane_index=0; plane_index<2; plane_index++){
1390 Plane *p= &s->plane[plane_index];
1393 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1397 put_symbol(&s->c, s->header_state, s->version, 0);
1398 put_rac(&s->c, s->header_state, s->always_reset);
1399 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1400 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1401 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1402 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1403 if (s->nb_planes > 2) {
1404 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1405 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1407 put_rac(&s->c, s->header_state, s->spatial_scalability);
1408 // put_rac(&s->c, s->header_state, s->rate_scalability);
1409 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1416 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1417 Plane *p= &s->plane[plane_index];
1418 update_mc |= p->last_htaps != p->htaps;
1419 update_mc |= p->last_diag_mc != p->diag_mc;
1420 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1422 put_rac(&s->c, s->header_state, update_mc);
1424 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1425 Plane *p= &s->plane[plane_index];
1426 put_rac(&s->c, s->header_state, p->diag_mc);
1427 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1428 for(i= p->htaps/2; i; i--)
1429 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1432 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1433 put_rac(&s->c, s->header_state, 1);
1434 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1437 put_rac(&s->c, s->header_state, 0);
1440 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1441 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
1442 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
1443 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
1444 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1448 static void update_last_header_values(SnowContext *s){
1452 for(plane_index=0; plane_index<2; plane_index++){
1453 Plane *p= &s->plane[plane_index];
1454 p->last_diag_mc= p->diag_mc;
1455 p->last_htaps = p->htaps;
1456 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1460 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
1461 s->last_qlog = s->qlog;
1462 s->last_qbias = s->qbias;
1463 s->last_mv_scale = s->mv_scale;
1464 s->last_block_max_depth = s->block_max_depth;
1465 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1468 static int qscale2qlog(int qscale){
1469 return rint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))
1470 + 61*QROOT/8; ///< 64 > 60
1473 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1475 /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1476 * FIXME we know exact mv bits at this point,
1477 * but ratecontrol isn't set up to include them. */
1478 uint32_t coef_sum= 0;
1479 int level, orientation, delta_qlog;
1481 for(level=0; level<s->spatial_decomposition_count; level++){
1482 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1483 SubBand *b= &s->plane[0].band[level][orientation];
1484 IDWTELEM *buf= b->ibuf;
1485 const int w= b->width;
1486 const int h= b->height;
1487 const int stride= b->stride;
1488 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1489 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1490 const int qdiv= (1<<16)/qmul;
1492 //FIXME this is ugly
1495 buf[x+y*stride]= b->buf[x+y*stride];
1497 decorrelate(s, b, buf, stride, 1, 0);
1500 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1504 /* ugly, ratecontrol just takes a sqrt again */
1505 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1506 av_assert0(coef_sum < INT_MAX);
1508 if(pict->pict_type == AV_PICTURE_TYPE_I){
1509 s->m.current_picture.mb_var_sum= coef_sum;
1510 s->m.current_picture.mc_mb_var_sum= 0;
1512 s->m.current_picture.mc_mb_var_sum= coef_sum;
1513 s->m.current_picture.mb_var_sum= 0;
1516 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1517 if (pict->quality < 0)
1519 s->lambda= pict->quality * 3/2;
1520 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1521 s->qlog+= delta_qlog;
1525 static void calculate_visual_weight(SnowContext *s, Plane *p){
1526 int width = p->width;
1527 int height= p->height;
1528 int level, orientation, x, y;
1530 for(level=0; level<s->spatial_decomposition_count; level++){
1531 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1532 SubBand *b= &p->band[level][orientation];
1533 IDWTELEM *ibuf= b->ibuf;
1536 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1537 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1538 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1539 for(y=0; y<height; y++){
1540 for(x=0; x<width; x++){
1541 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1546 b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
1551 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1552 AVFrame *pict, int *got_packet)
1554 SnowContext *s = avctx->priv_data;
1555 RangeCoder * const c= &s->c;
1556 AVFrame *pic = pict;
1557 const int width= s->avctx->width;
1558 const int height= s->avctx->height;
1559 int level, orientation, plane_index, i, y, ret;
1560 uint8_t rc_header_bak[sizeof(s->header_state)];
1561 uint8_t rc_block_bak[sizeof(s->block_state)];
1563 if ((ret = ff_alloc_packet2(avctx, pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + FF_MIN_BUFFER_SIZE)) < 0)
1566 ff_init_range_encoder(c, pkt->data, pkt->size);
1567 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1569 for(i=0; i < s->nb_planes; i++){
1570 int hshift= i ? s->chroma_h_shift : 0;
1571 int vshift= i ? s->chroma_v_shift : 0;
1572 for(y=0; y<(height>>vshift); y++)
1573 memcpy(&s->input_picture->data[i][y * s->input_picture->linesize[i]],
1574 &pict->data[i][y * pict->linesize[i]],
1576 s->dsp.draw_edges(s->input_picture->data[i], s->input_picture->linesize[i],
1577 width >> hshift, height >> vshift,
1578 EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
1579 EDGE_TOP | EDGE_BOTTOM);
1583 s->new_picture = pict;
1585 s->m.picture_number= avctx->frame_number;
1586 if(avctx->flags&CODEC_FLAG_PASS2){
1587 s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1588 s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
1589 if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
1590 pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1591 if (pic->quality < 0)
1595 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1596 s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1599 if(s->pass1_rc && avctx->frame_number == 0)
1600 pic->quality = 2*FF_QP2LAMBDA;
1602 s->qlog = qscale2qlog(pic->quality);
1603 s->lambda = pic->quality * 3/2;
1605 if (s->qlog < 0 || (!pic->quality && (avctx->flags & CODEC_FLAG_QSCALE))) {
1606 s->qlog= LOSSLESS_QLOG;
1608 }//else keep previous frame's qlog until after motion estimation
1610 ff_snow_frame_start(s);
1611 avctx->coded_frame= s->current_picture;
1613 s->m.current_picture_ptr= &s->m.current_picture;
1614 s->m.last_picture.f.pts = s->m.current_picture.f.pts;
1615 s->m.current_picture.f.pts = pict->pts;
1616 if(pic->pict_type == AV_PICTURE_TYPE_P){
1617 int block_width = (width +15)>>4;
1618 int block_height= (height+15)>>4;
1619 int stride= s->current_picture->linesize[0];
1621 av_assert0(s->current_picture->data[0]);
1622 av_assert0(s->last_picture[0]->data[0]);
1624 s->m.avctx= s->avctx;
1625 s->m.current_picture.f.data[0] = s->current_picture->data[0];
1626 s->m. last_picture.f.data[0] = s->last_picture[0]->data[0];
1627 s->m. new_picture.f.data[0] = s-> input_picture->data[0];
1628 s->m. last_picture_ptr= &s->m. last_picture;
1630 s->m. last_picture.f.linesize[0] =
1631 s->m. new_picture.f.linesize[0] =
1632 s->m.current_picture.f.linesize[0] = stride;
1633 s->m.uvlinesize= s->current_picture->linesize[1];
1635 s->m.height= height;
1636 s->m.mb_width = block_width;
1637 s->m.mb_height= block_height;
1638 s->m.mb_stride= s->m.mb_width+1;
1639 s->m.b8_stride= 2*s->m.mb_width+1;
1641 s->m.pict_type = pic->pict_type;
1642 s->m.me_method= s->avctx->me_method;
1643 s->m.me.scene_change_score=0;
1644 s->m.flags= s->avctx->flags;
1645 s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
1646 s->m.out_format= FMT_H263;
1647 s->m.unrestricted_mv= 1;
1649 s->m.lambda = s->lambda;
1650 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1651 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1653 s->m.dsp= s->dsp; //move
1654 s->m.hdsp = s->hdsp;
1656 s->hdsp = s->m.hdsp;
1661 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1662 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1667 if (pic->pict_type == AV_PICTURE_TYPE_I)
1668 s->spatial_decomposition_count= 5;
1670 s->spatial_decomposition_count= 5;
1672 while( !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
1673 || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
1674 s->spatial_decomposition_count--;
1676 if (s->spatial_decomposition_count <= 0) {
1677 av_log(avctx, AV_LOG_ERROR, "Resolution too low\n");
1678 return AVERROR(EINVAL);
1681 s->m.pict_type = pic->pict_type;
1682 s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
1684 ff_snow_common_init_after_header(avctx);
1686 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1687 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1688 calculate_visual_weight(s, &s->plane[plane_index]);
1693 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1694 encode_blocks(s, 1);
1695 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1697 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1698 Plane *p= &s->plane[plane_index];
1702 // int bits= put_bits_count(&s->c.pb);
1704 if (!s->memc_only) {
1706 if(pict->data[plane_index]) //FIXME gray hack
1709 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1712 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1715 && pic->pict_type == AV_PICTURE_TYPE_P
1716 && !(avctx->flags&CODEC_FLAG_PASS2)
1717 && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
1718 ff_init_range_encoder(c, pkt->data, pkt->size);
1719 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1720 pic->pict_type= AV_PICTURE_TYPE_I;
1722 s->current_picture->key_frame=1;
1726 if(s->qlog == LOSSLESS_QLOG){
1729 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1735 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1740 ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1742 if(s->pass1_rc && plane_index==0){
1743 int delta_qlog = ratecontrol_1pass(s, pic);
1744 if (delta_qlog <= INT_MIN)
1747 //reordering qlog in the bitstream would eliminate this reset
1748 ff_init_range_encoder(c, pkt->data, pkt->size);
1749 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
1750 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
1752 encode_blocks(s, 0);
1756 for(level=0; level<s->spatial_decomposition_count; level++){
1757 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1758 SubBand *b= &p->band[level][orientation];
1760 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1762 decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
1763 if (!s->no_bitstream)
1764 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1765 av_assert0(b->parent==NULL || b->parent->stride == b->stride*2);
1767 correlate(s, b, b->ibuf, b->stride, 1, 0);
1771 for(level=0; level<s->spatial_decomposition_count; level++){
1772 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1773 SubBand *b= &p->band[level][orientation];
1775 dequantize(s, b, b->ibuf, b->stride);
1779 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1780 if(s->qlog == LOSSLESS_QLOG){
1783 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1787 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1790 if(pic->pict_type == AV_PICTURE_TYPE_I){
1793 s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x]=
1794 pict->data[plane_index][y*pict->linesize[plane_index] + x];
1798 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1799 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1802 if(s->avctx->flags&CODEC_FLAG_PSNR){
1805 if(pict->data[plane_index]) //FIXME gray hack
1808 int d= s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x] - pict->data[plane_index][y*pict->linesize[plane_index] + x];
1812 s->avctx->error[plane_index] += error;
1813 s->current_picture->error[plane_index] = error;
1818 update_last_header_values(s);
1820 ff_snow_release_buffer(avctx);
1822 s->current_picture->coded_picture_number = avctx->frame_number;
1823 s->current_picture->pict_type = pict->pict_type;
1824 s->current_picture->quality = pict->quality;
1825 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1826 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1827 s->m.current_picture.f.display_picture_number =
1828 s->m.current_picture.f.coded_picture_number = avctx->frame_number;
1829 s->m.current_picture.f.quality = pic->quality;
1830 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1832 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1834 if(avctx->flags&CODEC_FLAG_PASS1)
1835 ff_write_pass1_stats(&s->m);
1836 s->m.last_pict_type = s->m.pict_type;
1837 avctx->frame_bits = s->m.frame_bits;
1838 avctx->mv_bits = s->m.mv_bits;
1839 avctx->misc_bits = s->m.misc_bits;
1840 avctx->p_tex_bits = s->m.p_tex_bits;
1844 pkt->size = ff_rac_terminate(c);
1845 if (avctx->coded_frame->key_frame)
1846 pkt->flags |= AV_PKT_FLAG_KEY;
1852 static av_cold int encode_end(AVCodecContext *avctx)
1854 SnowContext *s = avctx->priv_data;
1856 ff_snow_common_end(s);
1857 ff_rate_control_uninit(&s->m);
1858 av_frame_free(&s->input_picture);
1859 av_free(avctx->stats_out);
1864 #define OFFSET(x) offsetof(SnowContext, x)
1865 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1866 static const AVOption options[] = {
1867 { "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1868 { "no_bitstream", "Skip final bitstream writeout.", OFFSET(no_bitstream), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1872 static const AVClass snowenc_class = {
1873 .class_name = "snow encoder",
1874 .item_name = av_default_item_name,
1876 .version = LIBAVUTIL_VERSION_INT,
1879 AVCodec ff_snow_encoder = {
1881 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
1882 .type = AVMEDIA_TYPE_VIDEO,
1883 .id = AV_CODEC_ID_SNOW,
1884 .priv_data_size = sizeof(SnowContext),
1885 .init = encode_init,
1886 .encode2 = encode_frame,
1887 .close = encode_end,
1888 .pix_fmts = (const enum AVPixelFormat[]){
1889 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,
1893 .priv_class = &snowenc_class,
1902 #include "libavutil/lfg.h"
1903 #include "libavutil/mathematics.h"
1908 int buffer[2][width*height];
1912 s.spatial_decomposition_count=6;
1913 s.spatial_decomposition_type=1;
1915 s.temp_dwt_buffer = av_mallocz(width * sizeof(DWTELEM));
1916 s.temp_idwt_buffer = av_mallocz(width * sizeof(IDWTELEM));
1918 av_lfg_init(&prng, 1);
1920 printf("testing 5/3 DWT\n");
1921 for(i=0; i<width*height; i++)
1922 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1924 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1925 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1927 for(i=0; i<width*height; i++)
1928 if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1930 printf("testing 9/7 DWT\n");
1931 s.spatial_decomposition_type=0;
1932 for(i=0; i<width*height; i++)
1933 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1935 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1936 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1938 for(i=0; i<width*height; i++)
1939 if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1942 int level, orientation, x, y;
1943 int64_t errors[8][4];
1946 memset(errors, 0, sizeof(errors));
1947 s.spatial_decomposition_count=3;
1948 s.spatial_decomposition_type=0;
1949 for(level=0; level<s.spatial_decomposition_count; level++){
1950 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1951 int w= width >> (s.spatial_decomposition_count-level);
1952 int h= height >> (s.spatial_decomposition_count-level);
1953 int stride= width << (s.spatial_decomposition_count-level);
1954 DWTELEM *buf= buffer[0];
1957 if(orientation&1) buf+=w;
1958 if(orientation>1) buf+=stride>>1;
1960 memset(buffer[0], 0, sizeof(int)*width*height);
1961 buf[w/2 + h/2*stride]= 256*256;
1962 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1963 for(y=0; y<height; y++){
1964 for(x=0; x<width; x++){
1965 int64_t d= buffer[0][x + y*width];
1967 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);
1969 if(FFABS(height/2-y)<9 && level==2) printf("\n");
1971 error= (int)(sqrt(error)+0.5);
1972 errors[level][orientation]= error;
1973 if(g) g=av_gcd(g, error);
1977 printf("static int const visual_weight[][4]={\n");
1978 for(level=0; level<s.spatial_decomposition_count; level++){
1980 for(orientation=0; orientation<4; orientation++){
1981 printf("%8"PRId64",", errors[level][orientation]/g);
1988 int w= width >> (s.spatial_decomposition_count-level);
1989 //int h= height >> (s.spatial_decomposition_count-level);
1990 int stride= width << (s.spatial_decomposition_count-level);
1991 DWTELEM *buf= buffer[0];
1997 memset(buffer[0], 0, sizeof(int)*width*height);
1998 for(y=0; y<height; y++){
1999 for(x=0; x<width; x++){
2000 int tab[4]={0,2,3,1};
2001 buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];
2004 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2005 for(y=0; y<height; y++){
2006 for(x=0; x<width; x++){
2007 int64_t d= buffer[0][x + y*width];
2009 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);
2011 if(FFABS(height/2-y)<9) printf("\n");