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"
31 #include "rangecoder.h"
34 #include "mpegvideo.h"
45 static void find_sse(SnowContext *s, Plane *p, int *score, int score_stride, IDWTELEM *r0, IDWTELEM *r1, int level, int orientation){
46 SubBand *b= &p->band[level][orientation];
50 int step= 1 << (s->spatial_decomposition_count - level);
57 //FIXME bias for nonzero ?
59 memset(score, 0, sizeof(*score)*score_stride*((p->height + Q2_STEP-1)/Q2_STEP));
60 for(y=0; y<p->height; y++){
61 for(x=0; x<p->width; x++){
62 int sx= (x-xo + step/2) / step / Q2_STEP;
63 int sy= (y-yo + step/2) / step / Q2_STEP;
64 int v= r0[x + y*p->width] - r1[x + y*p->width];
65 assert(sx>=0 && sy>=0 && sx < score_stride);
67 score[sx + sy*score_stride] += v*v;
68 assert(score[sx + sy*score_stride] >= 0);
73 static void dequantize_all(SnowContext *s, Plane *p, IDWTELEM *buffer, int width, int height){
74 int level, orientation;
76 for(level=0; level<s->spatial_decomposition_count; level++){
77 for(orientation=level ? 1 : 0; orientation<4; orientation++){
78 SubBand *b= &p->band[level][orientation];
79 IDWTELEM *dst= buffer + (b->ibuf - s->spatial_idwt_buffer);
81 dequantize(s, b, dst, b->stride);
86 static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, int height, int stride, int type){
87 int level, orientation, ys, xs, x, y, pass;
88 IDWTELEM best_dequant[height * stride];
89 IDWTELEM idwt2_buffer[height * stride];
90 const int score_stride= (width + 10)/Q2_STEP;
91 int best_score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
92 int score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
93 int threshold= (s->m.lambda * s->m.lambda) >> 6;
95 //FIXME pass the copy cleanly ?
97 // memcpy(dwt_buffer, buffer, height * stride * sizeof(DWTELEM));
98 ff_spatial_dwt(buffer, s->temp_dwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
100 for(level=0; level<s->spatial_decomposition_count; level++){
101 for(orientation=level ? 1 : 0; orientation<4; orientation++){
102 SubBand *b= &p->band[level][orientation];
103 IDWTELEM *dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
104 DWTELEM *src= buffer + (b-> buf - s->spatial_dwt_buffer);
105 assert(src == b->buf); // code does not depend on this but it is true currently
107 quantize(s, b, dst, src, b->stride, s->qbias);
110 for(pass=0; pass<1; pass++){
111 if(s->qbias == 0) //keyframe
113 for(level=0; level<s->spatial_decomposition_count; level++){
114 for(orientation=level ? 1 : 0; orientation<4; orientation++){
115 SubBand *b= &p->band[level][orientation];
116 IDWTELEM *dst= idwt2_buffer + (b->ibuf - s->spatial_idwt_buffer);
117 IDWTELEM *best_dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
119 for(ys= 0; ys<Q2_STEP; ys++){
120 for(xs= 0; xs<Q2_STEP; xs++){
121 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
122 dequantize_all(s, p, idwt2_buffer, width, height);
123 ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
124 find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
125 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
126 for(y=ys; y<b->height; y+= Q2_STEP){
127 for(x=xs; x<b->width; x+= Q2_STEP){
128 if(dst[x + y*b->stride]<0) dst[x + y*b->stride]++;
129 if(dst[x + y*b->stride]>0) dst[x + y*b->stride]--;
130 //FIXME try more than just --
133 dequantize_all(s, p, idwt2_buffer, width, height);
134 ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
135 find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
136 for(y=ys; y<b->height; y+= Q2_STEP){
137 for(x=xs; x<b->width; x+= Q2_STEP){
138 int score_idx= x/Q2_STEP + (y/Q2_STEP)*score_stride;
139 if(score[score_idx] <= best_score[score_idx] + threshold){
140 best_score[score_idx]= score[score_idx];
141 if(best_dst[x + y*b->stride]<0) best_dst[x + y*b->stride]++;
142 if(best_dst[x + y*b->stride]>0) best_dst[x + y*b->stride]--;
152 memcpy(s->spatial_idwt_buffer, best_dequant, height * stride * sizeof(IDWTELEM)); //FIXME work with that directly instead of copy at the end
155 #endif /* QUANTIZE2==1 */
157 static av_cold int encode_init(AVCodecContext *avctx)
159 SnowContext *s = avctx->priv_data;
160 int plane_index, ret;
162 if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
163 av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
164 "Use vstrict=-2 / -strict -2 to use it anyway.\n");
168 if(avctx->prediction_method == DWT_97
169 && (avctx->flags & CODEC_FLAG_QSCALE)
170 && avctx->global_quality == 0){
171 av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
175 s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
177 s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
178 s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
180 for(plane_index=0; plane_index<3; plane_index++){
181 s->plane[plane_index].diag_mc= 1;
182 s->plane[plane_index].htaps= 6;
183 s->plane[plane_index].hcoeff[0]= 40;
184 s->plane[plane_index].hcoeff[1]= -10;
185 s->plane[plane_index].hcoeff[2]= 2;
186 s->plane[plane_index].fast_mc= 1;
189 if ((ret = ff_snow_common_init(avctx)) < 0) {
190 ff_snow_common_end(avctx->priv_data);
193 ff_snow_alloc_blocks(s);
198 s->m.flags = avctx->flags;
199 s->m.bit_rate= avctx->bit_rate;
202 s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
203 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
204 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
205 s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
206 ff_h263_encode_init(&s->m); //mv_penalty
208 s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
210 if(avctx->flags&CODEC_FLAG_PASS1){
211 if(!avctx->stats_out)
212 avctx->stats_out = av_mallocz(256);
214 if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
215 if(ff_rate_control_init(&s->m) < 0)
218 s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
220 avctx->coded_frame= &s->current_picture;
221 switch(avctx->pix_fmt){
222 case AV_PIX_FMT_YUV444P:
223 // case AV_PIX_FMT_YUV422P:
224 case AV_PIX_FMT_YUV420P:
225 // case AV_PIX_FMT_GRAY8:
226 // case AV_PIX_FMT_YUV411P:
227 case AV_PIX_FMT_YUV410P:
228 s->colorspace_type= 0;
230 /* case AV_PIX_FMT_RGB32:
234 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
237 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
239 ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
240 ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
242 if ((ret = ff_get_buffer(s->avctx, &s->input_picture)) < 0)
245 if(s->avctx->me_method == ME_ITER){
247 int size= s->b_width * s->b_height << 2*s->block_max_depth;
248 for(i=0; i<s->max_ref_frames; i++){
249 s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
250 s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
257 //near copy & paste from dsputil, FIXME
258 static int pix_sum(uint8_t * pix, int line_size, int w, int h)
263 for (i = 0; i < h; i++) {
264 for (j = 0; j < w; j++) {
268 pix += line_size - w;
273 //near copy & paste from dsputil, FIXME
274 static int pix_norm1(uint8_t * pix, int line_size, int w)
277 uint32_t *sq = ff_squareTbl + 256;
280 for (i = 0; i < w; i++) {
281 for (j = 0; j < w; j ++) {
285 pix += line_size - w;
293 #define P_TOPRIGHT P[3]
294 #define P_MEDIAN P[4]
296 #define FLAG_QPEL 1 //must be 1
298 static int encode_q_branch(SnowContext *s, int level, int x, int y){
299 uint8_t p_buffer[1024];
300 uint8_t i_buffer[1024];
301 uint8_t p_state[sizeof(s->block_state)];
302 uint8_t i_state[sizeof(s->block_state)];
304 uint8_t *pbbak= s->c.bytestream;
305 uint8_t *pbbak_start= s->c.bytestream_start;
306 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
307 const int w= s->b_width << s->block_max_depth;
308 const int h= s->b_height << s->block_max_depth;
309 const int rem_depth= s->block_max_depth - level;
310 const int index= (x + y*w) << rem_depth;
311 const int block_w= 1<<(LOG2_MB_SIZE - level);
312 int trx= (x+1)<<rem_depth;
313 int try= (y+1)<<rem_depth;
314 const BlockNode *left = x ? &s->block[index-1] : &null_block;
315 const BlockNode *top = y ? &s->block[index-w] : &null_block;
316 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
317 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
318 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
319 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
320 int pl = left->color[0];
321 int pcb= left->color[1];
322 int pcr= left->color[2];
326 const int stride= s->current_picture.linesize[0];
327 const int uvstride= s->current_picture.linesize[1];
328 uint8_t *current_data[3]= { s->input_picture.data[0] + (x + y* stride)*block_w,
329 s->input_picture.data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
330 s->input_picture.data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
332 int16_t last_mv[3][2];
333 int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
334 const int shift= 1+qpel;
335 MotionEstContext *c= &s->m.me;
336 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
337 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
338 int my_context= av_log2(2*FFABS(left->my - top->my));
339 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
340 int ref, best_ref, ref_score, ref_mx, ref_my;
342 assert(sizeof(s->block_state) >= 256);
344 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
348 // clip predictors / edge ?
354 P_TOPRIGHT[0]= tr->mx;
355 P_TOPRIGHT[1]= tr->my;
357 last_mv[0][0]= s->block[index].mx;
358 last_mv[0][1]= s->block[index].my;
359 last_mv[1][0]= right->mx;
360 last_mv[1][1]= right->my;
361 last_mv[2][0]= bottom->mx;
362 last_mv[2][1]= bottom->my;
369 assert(c-> stride == stride);
370 assert(c->uvstride == uvstride);
372 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
373 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
374 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
375 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
377 c->xmin = - x*block_w - 16+3;
378 c->ymin = - y*block_w - 16+3;
379 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
380 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
382 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
383 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
384 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
385 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
386 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
387 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
388 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
390 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
391 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
394 c->pred_x= P_LEFT[0];
395 c->pred_y= P_LEFT[1];
397 c->pred_x = P_MEDIAN[0];
398 c->pred_y = P_MEDIAN[1];
403 for(ref=0; ref<s->ref_frames; ref++){
404 init_ref(c, current_data, s->last_picture[ref].data, NULL, block_w*x, block_w*y, 0);
406 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
407 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
409 assert(ref_mx >= c->xmin);
410 assert(ref_mx <= c->xmax);
411 assert(ref_my >= c->ymin);
412 assert(ref_my <= c->ymax);
414 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
415 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
416 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
418 s->ref_mvs[ref][index][0]= ref_mx;
419 s->ref_mvs[ref][index][1]= ref_my;
420 s->ref_scores[ref][index]= ref_score;
422 if(score > ref_score){
429 //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
432 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
435 pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
436 memcpy(p_state, s->block_state, sizeof(s->block_state));
438 if(level!=s->block_max_depth)
439 put_rac(&pc, &p_state[4 + s_context], 1);
440 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
441 if(s->ref_frames > 1)
442 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
443 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
444 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
445 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
446 p_len= pc.bytestream - pc.bytestream_start;
447 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
449 block_s= block_w*block_w;
450 sum = pix_sum(current_data[0], stride, block_w, block_w);
451 l= (sum + block_s/2)/block_s;
452 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
454 block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
455 sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
456 cb= (sum + block_s/2)/block_s;
457 // iscore += pix_norm1(¤t_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
458 sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
459 cr= (sum + block_s/2)/block_s;
460 // iscore += pix_norm1(¤t_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
464 ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
465 memcpy(i_state, s->block_state, sizeof(s->block_state));
466 if(level!=s->block_max_depth)
467 put_rac(&ic, &i_state[4 + s_context], 1);
468 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
469 put_symbol(&ic, &i_state[32], l-pl , 1);
470 put_symbol(&ic, &i_state[64], cb-pcb, 1);
471 put_symbol(&ic, &i_state[96], cr-pcr, 1);
472 i_len= ic.bytestream - ic.bytestream_start;
473 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
475 // assert(score==256*256*256*64-1);
476 assert(iscore < 255*255*256 + s->lambda2*10);
478 assert(l>=0 && l<=255);
479 assert(pl>=0 && pl<=255);
482 int varc= iscore >> 8;
483 int vard= score >> 8;
484 if (vard <= 64 || vard < varc)
485 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
487 c->scene_change_score+= s->m.qscale;
490 if(level!=s->block_max_depth){
491 put_rac(&s->c, &s->block_state[4 + s_context], 0);
492 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
493 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
494 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
495 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
496 score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
498 if(score2 < score && score2 < iscore)
503 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
504 memcpy(pbbak, i_buffer, i_len);
506 s->c.bytestream_start= pbbak_start;
507 s->c.bytestream= pbbak + i_len;
508 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
509 memcpy(s->block_state, i_state, sizeof(s->block_state));
512 memcpy(pbbak, p_buffer, p_len);
514 s->c.bytestream_start= pbbak_start;
515 s->c.bytestream= pbbak + p_len;
516 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
517 memcpy(s->block_state, p_state, sizeof(s->block_state));
522 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
523 const int w= s->b_width << s->block_max_depth;
524 const int rem_depth= s->block_max_depth - level;
525 const int index= (x + y*w) << rem_depth;
526 int trx= (x+1)<<rem_depth;
527 BlockNode *b= &s->block[index];
528 const BlockNode *left = x ? &s->block[index-1] : &null_block;
529 const BlockNode *top = y ? &s->block[index-w] : &null_block;
530 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
531 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
532 int pl = left->color[0];
533 int pcb= left->color[1];
534 int pcr= left->color[2];
536 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
537 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
538 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
539 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
542 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
546 if(level!=s->block_max_depth){
547 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
548 put_rac(&s->c, &s->block_state[4 + s_context], 1);
550 put_rac(&s->c, &s->block_state[4 + s_context], 0);
551 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
552 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
553 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
554 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
558 if(b->type & BLOCK_INTRA){
559 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
560 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
561 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
562 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
563 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
564 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
566 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
567 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
568 if(s->ref_frames > 1)
569 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
570 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
571 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
572 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
576 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
578 Plane *p= &s->plane[plane_index];
579 const int block_size = MB_SIZE >> s->block_max_depth;
580 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
581 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
582 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
583 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
584 const int ref_stride= s->current_picture.linesize[plane_index];
585 uint8_t *src= s-> input_picture.data[plane_index];
586 IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
587 const int b_stride = s->b_width << s->block_max_depth;
588 const int w= p->width;
589 const int h= p->height;
590 int index= mb_x + mb_y*b_stride;
591 BlockNode *b= &s->block[index];
592 BlockNode backup= *b;
596 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
598 b->type|= BLOCK_INTRA;
599 b->color[plane_index]= 0;
600 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
603 int mb_x2= mb_x + (i &1) - 1;
604 int mb_y2= mb_y + (i>>1) - 1;
605 int x= block_w*mb_x2 + block_w/2;
606 int y= block_h*mb_y2 + block_h/2;
608 add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
609 x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
611 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
612 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
613 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
614 int obmc_v= obmc[index];
616 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
617 if(x<0) obmc_v += obmc[index + block_w];
618 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
619 if(x+block_w>w) obmc_v += obmc[index - block_w];
620 //FIXME precalculate this or simplify it somehow else
622 d = -dst[index] + (1<<(FRAC_BITS-1));
624 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
625 aa += obmc_v * obmc_v; //FIXME precalculate this
631 return av_clip( ROUNDED_DIV(ab<<LOG2_OBMC_MAX, aa), 0, 255); //FIXME we should not need clipping
634 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
635 const int b_stride = s->b_width << s->block_max_depth;
636 const int b_height = s->b_height<< s->block_max_depth;
637 int index= x + y*b_stride;
638 const BlockNode *b = &s->block[index];
639 const BlockNode *left = x ? &s->block[index-1] : &null_block;
640 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
641 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
642 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
644 // int mx_context= av_log2(2*FFABS(left->mx - top->mx));
645 // int my_context= av_log2(2*FFABS(left->my - top->my));
647 if(x<0 || x>=b_stride || y>=b_height)
656 //FIXME try accurate rate
657 //FIXME intra and inter predictors if surrounding blocks are not the same type
658 if(b->type & BLOCK_INTRA){
659 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
660 + av_log2(2*FFABS(left->color[1] - b->color[1]))
661 + av_log2(2*FFABS(left->color[2] - b->color[2])));
663 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
666 return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
667 + av_log2(2*FFABS(dmy))
668 + av_log2(2*b->ref));
672 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){
673 Plane *p= &s->plane[plane_index];
674 const int block_size = MB_SIZE >> s->block_max_depth;
675 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
676 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
677 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
678 const int ref_stride= s->current_picture.linesize[plane_index];
679 uint8_t *dst= s->current_picture.data[plane_index];
680 uint8_t *src= s-> input_picture.data[plane_index];
681 IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
682 uint8_t *cur = s->scratchbuf;
683 uint8_t *tmp = s->emu_edge_buffer;
684 const int b_stride = s->b_width << s->block_max_depth;
685 const int b_height = s->b_height<< s->block_max_depth;
686 const int w= p->width;
687 const int h= p->height;
690 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
691 int sx= block_w*mb_x - block_w/2;
692 int sy= block_h*mb_y - block_h/2;
693 int x0= FFMAX(0,-sx);
694 int y0= FFMAX(0,-sy);
695 int x1= FFMIN(block_w*2, w-sx);
696 int y1= FFMIN(block_h*2, h-sy);
699 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
701 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);
703 for(y=y0; y<y1; y++){
704 const uint8_t *obmc1= obmc_edged[y];
705 const IDWTELEM *pred1 = pred + y*obmc_stride;
706 uint8_t *cur1 = cur + y*ref_stride;
707 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
708 for(x=x0; x<x1; x++){
709 #if FRAC_BITS >= LOG2_OBMC_MAX
710 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
712 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
714 v = (v + pred1[x]) >> FRAC_BITS;
715 if(v&(~255)) v= ~(v>>31);
720 /* copy the regions where obmc[] = (uint8_t)256 */
721 if(LOG2_OBMC_MAX == 8
722 && (mb_x == 0 || mb_x == b_stride-1)
723 && (mb_y == 0 || mb_y == b_height-1)){
733 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
737 /* FIXME rearrange dsputil to fit 32x32 cmp functions */
738 /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
739 /* FIXME cmps overlap but do not cover the wavelet's whole support.
740 * So improving the score of one block is not strictly guaranteed
741 * to improve the score of the whole frame, thus iterative motion
742 * estimation does not always converge. */
743 if(s->avctx->me_cmp == FF_CMP_W97)
744 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
745 else if(s->avctx->me_cmp == FF_CMP_W53)
746 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
750 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
751 distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
756 distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
765 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
767 if(mb_x == b_stride-2)
768 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
770 return distortion + rate*penalty_factor;
773 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
775 Plane *p= &s->plane[plane_index];
776 const int block_size = MB_SIZE >> s->block_max_depth;
777 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
778 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
779 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
780 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
781 const int ref_stride= s->current_picture.linesize[plane_index];
782 uint8_t *dst= s->current_picture.data[plane_index];
783 uint8_t *src= s-> input_picture.data[plane_index];
784 //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
785 // const has only been removed from zero_dst to suppress a warning
786 static IDWTELEM zero_dst[4096]; //FIXME
787 const int b_stride = s->b_width << s->block_max_depth;
788 const int w= p->width;
789 const int h= p->height;
792 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
794 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
797 int mb_x2= mb_x + (i%3) - 1;
798 int mb_y2= mb_y + (i/3) - 1;
799 int x= block_w*mb_x2 + block_w/2;
800 int y= block_h*mb_y2 + block_h/2;
802 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
803 x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
805 //FIXME find a cleaner/simpler way to skip the outside stuff
806 for(y2= y; y2<0; y2++)
807 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
808 for(y2= h; y2<y+block_h; y2++)
809 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
811 for(y2= y; y2<y+block_h; y2++)
812 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
815 for(y2= y; y2<y+block_h; y2++)
816 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
819 assert(block_w== 8 || block_w==16);
820 distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
824 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
825 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
833 rate = get_block_bits(s, mb_x, mb_y, 2);
834 for(i=merged?4:0; i<9; i++){
835 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
836 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
839 return distortion + rate*penalty_factor;
842 static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
843 const int w= b->width;
844 const int h= b->height;
849 int *runs = s->run_buffer;
856 int /*ll=0, */l=0, lt=0, t=0, rt=0;
857 v= src[x + y*stride];
860 t= src[x + (y-1)*stride];
862 lt= src[x - 1 + (y-1)*stride];
865 rt= src[x + 1 + (y-1)*stride];
869 l= src[x - 1 + y*stride];
871 if(orientation==1) ll= src[y + (x-2)*stride];
872 else ll= src[x - 2 + y*stride];
878 if(px<b->parent->width && py<b->parent->height)
879 p= parent[px + py*2*stride];
881 if(!(/*ll|*/l|lt|t|rt|p)){
883 runs[run_index++]= run;
891 max_index= run_index;
892 runs[run_index++]= run;
894 run= runs[run_index++];
896 put_symbol2(&s->c, b->state[30], max_index, 0);
897 if(run_index <= max_index)
898 put_symbol2(&s->c, b->state[1], run, 3);
901 if(s->c.bytestream_end - s->c.bytestream < w*40){
902 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
907 int /*ll=0, */l=0, lt=0, t=0, rt=0;
908 v= src[x + y*stride];
911 t= src[x + (y-1)*stride];
913 lt= src[x - 1 + (y-1)*stride];
916 rt= src[x + 1 + (y-1)*stride];
920 l= src[x - 1 + y*stride];
922 if(orientation==1) ll= src[y + (x-2)*stride];
923 else ll= src[x - 2 + y*stride];
929 if(px<b->parent->width && py<b->parent->height)
930 p= parent[px + py*2*stride];
932 if(/*ll|*/l|lt|t|rt|p){
933 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
935 put_rac(&s->c, &b->state[0][context], !!v);
938 run= runs[run_index++];
940 if(run_index <= max_index)
941 put_symbol2(&s->c, b->state[1], run, 3);
949 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
950 int l2= 2*FFABS(l) + (l<0);
951 int t2= 2*FFABS(t) + (t<0);
953 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
954 put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
962 static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
963 // encode_subband_qtree(s, b, src, parent, stride, orientation);
964 // encode_subband_z0run(s, b, src, parent, stride, orientation);
965 return encode_subband_c0run(s, b, src, parent, stride, orientation);
966 // encode_subband_dzr(s, b, src, parent, stride, orientation);
969 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){
970 const int b_stride= s->b_width << s->block_max_depth;
971 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
972 BlockNode backup= *block;
976 assert(mb_x>=0 && mb_y>=0);
977 assert(mb_x<b_stride);
980 block->color[0] = p[0];
981 block->color[1] = p[1];
982 block->color[2] = p[2];
983 block->type |= BLOCK_INTRA;
985 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
986 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
987 if(s->me_cache[index] == value)
989 s->me_cache[index]= value;
993 block->type &= ~BLOCK_INTRA;
996 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
1008 /* special case for int[2] args we discard afterwards,
1009 * fixes compilation problem with gcc 2.95 */
1010 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){
1011 int p[2] = {p0, p1};
1012 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
1015 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){
1016 const int b_stride= s->b_width << s->block_max_depth;
1017 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
1018 BlockNode backup[4];
1022 /* We don't initialize backup[] during variable declaration, because
1023 * that fails to compile on MSVC: "cannot convert from 'BlockNode' to
1025 backup[0] = block[0];
1026 backup[1] = block[1];
1027 backup[2] = block[b_stride];
1028 backup[3] = block[b_stride + 1];
1030 assert(mb_x>=0 && mb_y>=0);
1031 assert(mb_x<b_stride);
1032 assert(((mb_x|mb_y)&1) == 0);
1034 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
1035 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
1036 if(s->me_cache[index] == value)
1038 s->me_cache[index]= value;
1043 block->type &= ~BLOCK_INTRA;
1044 block[1]= block[b_stride]= block[b_stride+1]= *block;
1046 rd= get_4block_rd(s, mb_x, mb_y, 0);
1053 block[0]= backup[0];
1054 block[1]= backup[1];
1055 block[b_stride]= backup[2];
1056 block[b_stride+1]= backup[3];
1061 static void iterative_me(SnowContext *s){
1062 int pass, mb_x, mb_y;
1063 const int b_width = s->b_width << s->block_max_depth;
1064 const int b_height= s->b_height << s->block_max_depth;
1065 const int b_stride= b_width;
1069 RangeCoder r = s->c;
1070 uint8_t state[sizeof(s->block_state)];
1071 memcpy(state, s->block_state, sizeof(s->block_state));
1072 for(mb_y= 0; mb_y<s->b_height; mb_y++)
1073 for(mb_x= 0; mb_x<s->b_width; mb_x++)
1074 encode_q_branch(s, 0, mb_x, mb_y);
1076 memcpy(s->block_state, state, sizeof(s->block_state));
1079 for(pass=0; pass<25; pass++){
1082 for(mb_y= 0; mb_y<b_height; mb_y++){
1083 for(mb_x= 0; mb_x<b_width; mb_x++){
1084 int dia_change, i, j, ref;
1085 int best_rd= INT_MAX, ref_rd;
1086 BlockNode backup, ref_b;
1087 const int index= mb_x + mb_y * b_stride;
1088 BlockNode *block= &s->block[index];
1089 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
1090 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
1091 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
1092 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
1093 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
1094 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
1095 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1096 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1097 const int b_w= (MB_SIZE >> s->block_max_depth);
1098 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
1100 if(pass && (block->type & BLOCK_OPT))
1102 block->type |= BLOCK_OPT;
1106 if(!s->me_cache_generation)
1107 memset(s->me_cache, 0, sizeof(s->me_cache));
1108 s->me_cache_generation += 1<<22;
1110 //FIXME precalculate
1113 for (y = 0; y < b_w * 2; y++)
1114 memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
1116 for(y=0; y<b_w*2; y++)
1117 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1118 if(mb_x==b_stride-1)
1119 for(y=0; y<b_w*2; y++)
1120 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1122 for(x=0; x<b_w*2; x++)
1123 obmc_edged[0][x] += obmc_edged[b_w-1][x];
1124 for(y=1; y<b_w; y++)
1125 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1127 if(mb_y==b_height-1){
1128 for(x=0; x<b_w*2; x++)
1129 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1130 for(y=b_w; y<b_w*2-1; y++)
1131 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1135 //skip stuff outside the picture
1136 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1137 uint8_t *src= s-> input_picture.data[0];
1138 uint8_t *dst= s->current_picture.data[0];
1139 const int stride= s->current_picture.linesize[0];
1140 const int block_w= MB_SIZE >> s->block_max_depth;
1141 const int block_h= MB_SIZE >> s->block_max_depth;
1142 const int sx= block_w*mb_x - block_w/2;
1143 const int sy= block_h*mb_y - block_h/2;
1144 const int w= s->plane[0].width;
1145 const int h= s->plane[0].height;
1149 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1150 for(y=h; y<sy+block_h*2; y++)
1151 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1153 for(y=sy; y<sy+block_h*2; y++)
1154 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1156 if(sx+block_w*2 > w){
1157 for(y=sy; y<sy+block_h*2; y++)
1158 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1162 // intra(black) = neighbors' contribution to the current block
1164 color[i]= get_dc(s, mb_x, mb_y, i);
1166 // get previous score (cannot be cached due to OBMC)
1167 if(pass > 0 && (block->type&BLOCK_INTRA)){
1168 int color0[3]= {block->color[0], block->color[1], block->color[2]};
1169 check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);
1171 check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
1175 for(ref=0; ref < s->ref_frames; ref++){
1176 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1177 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1182 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
1183 check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
1185 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
1187 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);
1189 check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);
1191 check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
1194 //FIXME avoid subpel interpolation / round to nearest integer
1197 for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
1199 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1200 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1201 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1202 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1208 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1211 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
1213 //FIXME or try the standard 2 pass qpel or similar
1215 mvr[0][0]= block->mx;
1216 mvr[0][1]= block->my;
1217 if(ref_rd > best_rd){
1224 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);
1225 //FIXME RD style color selection
1226 if(!same_block(block, &backup)){
1227 if(tb ) tb ->type &= ~BLOCK_OPT;
1228 if(lb ) lb ->type &= ~BLOCK_OPT;
1229 if(rb ) rb ->type &= ~BLOCK_OPT;
1230 if(bb ) bb ->type &= ~BLOCK_OPT;
1231 if(tlb) tlb->type &= ~BLOCK_OPT;
1232 if(trb) trb->type &= ~BLOCK_OPT;
1233 if(blb) blb->type &= ~BLOCK_OPT;
1234 if(brb) brb->type &= ~BLOCK_OPT;
1239 av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
1244 if(s->block_max_depth == 1){
1246 for(mb_y= 0; mb_y<b_height; mb_y+=2){
1247 for(mb_x= 0; mb_x<b_width; mb_x+=2){
1249 int best_rd, init_rd;
1250 const int index= mb_x + mb_y * b_stride;
1253 b[0]= &s->block[index];
1255 b[2]= b[0]+b_stride;
1257 if(same_block(b[0], b[1]) &&
1258 same_block(b[0], b[2]) &&
1259 same_block(b[0], b[3]))
1262 if(!s->me_cache_generation)
1263 memset(s->me_cache, 0, sizeof(s->me_cache));
1264 s->me_cache_generation += 1<<22;
1266 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1268 //FIXME more multiref search?
1269 check_4block_inter(s, mb_x, mb_y,
1270 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1271 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1274 if(!(b[i]->type&BLOCK_INTRA))
1275 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1277 if(init_rd != best_rd)
1281 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1285 static void encode_blocks(SnowContext *s, int search){
1290 if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
1294 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1295 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1299 if(s->avctx->me_method == ME_ITER || !search)
1300 encode_q_branch2(s, 0, x, y);
1302 encode_q_branch (s, 0, x, y);
1307 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1308 const int w= b->width;
1309 const int h= b->height;
1310 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1311 const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1312 int x,y, thres1, thres2;
1314 if(s->qlog == LOSSLESS_QLOG){
1317 dst[x + y*stride]= src[x + y*stride];
1321 bias= bias ? 0 : (3*qmul)>>3;
1322 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1328 int i= src[x + y*stride];
1330 if((unsigned)(i+thres1) > thres2){
1333 i/= qmul; //FIXME optimize
1334 dst[x + y*stride]= i;
1338 i/= qmul; //FIXME optimize
1339 dst[x + y*stride]= -i;
1342 dst[x + y*stride]= 0;
1348 int i= src[x + y*stride];
1350 if((unsigned)(i+thres1) > thres2){
1353 i= (i + bias) / qmul; //FIXME optimize
1354 dst[x + y*stride]= i;
1358 i= (i + bias) / qmul; //FIXME optimize
1359 dst[x + y*stride]= -i;
1362 dst[x + y*stride]= 0;
1368 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1369 const int w= b->width;
1370 const int h= b->height;
1371 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1372 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1373 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1376 if(s->qlog == LOSSLESS_QLOG) return;
1380 int i= src[x + y*stride];
1382 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1384 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1390 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1391 const int w= b->width;
1392 const int h= b->height;
1395 for(y=h-1; y>=0; y--){
1396 for(x=w-1; x>=0; x--){
1397 int i= x + y*stride;
1401 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1402 else src[i] -= src[i - 1];
1404 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1405 else src[i] -= src[i - 1];
1408 if(y) src[i] -= src[i - stride];
1414 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1415 const int w= b->width;
1416 const int h= b->height;
1421 int i= x + y*stride;
1425 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1426 else src[i] += src[i - 1];
1428 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1429 else src[i] += src[i - 1];
1432 if(y) src[i] += src[i - stride];
1438 static void encode_qlogs(SnowContext *s){
1439 int plane_index, level, orientation;
1441 for(plane_index=0; plane_index<2; plane_index++){
1442 for(level=0; level<s->spatial_decomposition_count; level++){
1443 for(orientation=level ? 1:0; orientation<4; orientation++){
1444 if(orientation==2) continue;
1445 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1451 static void encode_header(SnowContext *s){
1455 memset(kstate, MID_STATE, sizeof(kstate));
1457 put_rac(&s->c, kstate, s->keyframe);
1458 if(s->keyframe || s->always_reset){
1459 ff_snow_reset_contexts(s);
1460 s->last_spatial_decomposition_type=
1464 s->last_block_max_depth= 0;
1465 for(plane_index=0; plane_index<2; plane_index++){
1466 Plane *p= &s->plane[plane_index];
1469 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1473 put_symbol(&s->c, s->header_state, s->version, 0);
1474 put_rac(&s->c, s->header_state, s->always_reset);
1475 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1476 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1477 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1478 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1479 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1480 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1481 put_rac(&s->c, s->header_state, s->spatial_scalability);
1482 // put_rac(&s->c, s->header_state, s->rate_scalability);
1483 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1490 for(plane_index=0; plane_index<2; plane_index++){
1491 Plane *p= &s->plane[plane_index];
1492 update_mc |= p->last_htaps != p->htaps;
1493 update_mc |= p->last_diag_mc != p->diag_mc;
1494 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1496 put_rac(&s->c, s->header_state, update_mc);
1498 for(plane_index=0; plane_index<2; plane_index++){
1499 Plane *p= &s->plane[plane_index];
1500 put_rac(&s->c, s->header_state, p->diag_mc);
1501 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1502 for(i= p->htaps/2; i; i--)
1503 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1506 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1507 put_rac(&s->c, s->header_state, 1);
1508 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1511 put_rac(&s->c, s->header_state, 0);
1514 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1515 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
1516 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
1517 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
1518 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1522 static void update_last_header_values(SnowContext *s){
1526 for(plane_index=0; plane_index<2; plane_index++){
1527 Plane *p= &s->plane[plane_index];
1528 p->last_diag_mc= p->diag_mc;
1529 p->last_htaps = p->htaps;
1530 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1534 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
1535 s->last_qlog = s->qlog;
1536 s->last_qbias = s->qbias;
1537 s->last_mv_scale = s->mv_scale;
1538 s->last_block_max_depth = s->block_max_depth;
1539 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1542 static int qscale2qlog(int qscale){
1543 return rint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))
1544 + 61*QROOT/8; ///< 64 > 60
1547 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1549 /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1550 * FIXME we know exact mv bits at this point,
1551 * but ratecontrol isn't set up to include them. */
1552 uint32_t coef_sum= 0;
1553 int level, orientation, delta_qlog;
1555 for(level=0; level<s->spatial_decomposition_count; level++){
1556 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1557 SubBand *b= &s->plane[0].band[level][orientation];
1558 IDWTELEM *buf= b->ibuf;
1559 const int w= b->width;
1560 const int h= b->height;
1561 const int stride= b->stride;
1562 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1563 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1564 const int qdiv= (1<<16)/qmul;
1566 //FIXME this is ugly
1569 buf[x+y*stride]= b->buf[x+y*stride];
1571 decorrelate(s, b, buf, stride, 1, 0);
1574 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1578 /* ugly, ratecontrol just takes a sqrt again */
1579 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1580 assert(coef_sum < INT_MAX);
1582 if(pict->pict_type == AV_PICTURE_TYPE_I){
1583 s->m.current_picture.mb_var_sum= coef_sum;
1584 s->m.current_picture.mc_mb_var_sum= 0;
1586 s->m.current_picture.mc_mb_var_sum= coef_sum;
1587 s->m.current_picture.mb_var_sum= 0;
1590 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1591 if (pict->quality < 0)
1593 s->lambda= pict->quality * 3/2;
1594 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1595 s->qlog+= delta_qlog;
1599 static void calculate_visual_weight(SnowContext *s, Plane *p){
1600 int width = p->width;
1601 int height= p->height;
1602 int level, orientation, x, y;
1604 for(level=0; level<s->spatial_decomposition_count; level++){
1605 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1606 SubBand *b= &p->band[level][orientation];
1607 IDWTELEM *ibuf= b->ibuf;
1610 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1611 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1612 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1613 for(y=0; y<height; y++){
1614 for(x=0; x<width; x++){
1615 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1620 b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
1625 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1626 const AVFrame *pict, int *got_packet)
1628 SnowContext *s = avctx->priv_data;
1629 RangeCoder * const c= &s->c;
1630 AVFrame *pic = &s->new_picture;
1631 const int width= s->avctx->width;
1632 const int height= s->avctx->height;
1633 int level, orientation, plane_index, i, y, ret;
1634 uint8_t rc_header_bak[sizeof(s->header_state)];
1635 uint8_t rc_block_bak[sizeof(s->block_state)];
1637 if ((ret = ff_alloc_packet2(avctx, pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + FF_MIN_BUFFER_SIZE)) < 0)
1640 ff_init_range_encoder(c, pkt->data, pkt->size);
1641 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1644 int hshift= i ? s->chroma_h_shift : 0;
1645 int vshift= i ? s->chroma_v_shift : 0;
1646 for(y=0; y<(height>>vshift); y++)
1647 memcpy(&s->input_picture.data[i][y * s->input_picture.linesize[i]],
1648 &pict->data[i][y * pict->linesize[i]],
1651 s->new_picture = *pict;
1653 s->m.picture_number= avctx->frame_number;
1654 if(avctx->flags&CODEC_FLAG_PASS2){
1655 s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1656 s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
1657 if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
1658 pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1659 if (pic->quality < 0)
1663 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1664 s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1667 if(s->pass1_rc && avctx->frame_number == 0)
1668 pic->quality = 2*FF_QP2LAMBDA;
1670 s->qlog = qscale2qlog(pic->quality);
1671 s->lambda = pic->quality * 3/2;
1673 if (s->qlog < 0 || (!pic->quality && (avctx->flags & CODEC_FLAG_QSCALE))) {
1674 s->qlog= LOSSLESS_QLOG;
1676 }//else keep previous frame's qlog until after motion estimation
1678 ff_snow_frame_start(s);
1680 s->m.current_picture_ptr= &s->m.current_picture;
1681 s->m.last_picture.f.pts = s->m.current_picture.f.pts;
1682 s->m.current_picture.f.pts = pict->pts;
1683 if(pic->pict_type == AV_PICTURE_TYPE_P){
1684 int block_width = (width +15)>>4;
1685 int block_height= (height+15)>>4;
1686 int stride= s->current_picture.linesize[0];
1688 assert(s->current_picture.data[0]);
1689 assert(s->last_picture[0].data[0]);
1691 s->m.avctx= s->avctx;
1692 s->m.current_picture.f.data[0] = s->current_picture.data[0];
1693 s->m. last_picture.f.data[0] = s->last_picture[0].data[0];
1694 s->m. new_picture.f.data[0] = s-> input_picture.data[0];
1695 s->m. last_picture_ptr= &s->m. last_picture;
1697 s->m. last_picture.f.linesize[0] =
1698 s->m. new_picture.f.linesize[0] =
1699 s->m.current_picture.f.linesize[0] = stride;
1700 s->m.uvlinesize= s->current_picture.linesize[1];
1702 s->m.height= height;
1703 s->m.mb_width = block_width;
1704 s->m.mb_height= block_height;
1705 s->m.mb_stride= s->m.mb_width+1;
1706 s->m.b8_stride= 2*s->m.mb_width+1;
1708 s->m.pict_type = pic->pict_type;
1709 s->m.me_method= s->avctx->me_method;
1710 s->m.me.scene_change_score=0;
1711 s->m.flags= s->avctx->flags;
1712 s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
1713 s->m.out_format= FMT_H263;
1714 s->m.unrestricted_mv= 1;
1716 s->m.lambda = s->lambda;
1717 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1718 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1720 s->m.dsp= s->dsp; //move
1726 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1727 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1732 if (pic->pict_type == AV_PICTURE_TYPE_I)
1733 s->spatial_decomposition_count= 5;
1735 s->spatial_decomposition_count= 5;
1737 while( !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
1738 || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
1739 s->spatial_decomposition_count--;
1741 s->m.pict_type = pic->pict_type;
1742 s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
1744 ff_snow_common_init_after_header(avctx);
1746 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1747 for(plane_index=0; plane_index<3; plane_index++){
1748 calculate_visual_weight(s, &s->plane[plane_index]);
1753 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1754 encode_blocks(s, 1);
1755 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1757 for(plane_index=0; plane_index<3; plane_index++){
1758 Plane *p= &s->plane[plane_index];
1762 // int bits= put_bits_count(&s->c.pb);
1764 if (!s->memc_only) {
1766 if(pict->data[plane_index]) //FIXME gray hack
1769 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1772 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1775 && pic->pict_type == AV_PICTURE_TYPE_P
1776 && !(avctx->flags&CODEC_FLAG_PASS2)
1777 && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
1778 ff_init_range_encoder(c, pkt->data, pkt->size);
1779 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1780 pic->pict_type= AV_PICTURE_TYPE_I;
1782 s->current_picture.key_frame=1;
1786 if(s->qlog == LOSSLESS_QLOG){
1789 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1795 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1801 dwt_quantize(s, p, s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type);
1803 ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1805 if(s->pass1_rc && plane_index==0){
1806 int delta_qlog = ratecontrol_1pass(s, pic);
1807 if (delta_qlog <= INT_MIN)
1810 //reordering qlog in the bitstream would eliminate this reset
1811 ff_init_range_encoder(c, pkt->data, pkt->size);
1812 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
1813 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
1815 encode_blocks(s, 0);
1819 for(level=0; level<s->spatial_decomposition_count; level++){
1820 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1821 SubBand *b= &p->band[level][orientation];
1824 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1826 decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
1827 if (!s->no_bitstream)
1828 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1829 assert(b->parent==NULL || b->parent->stride == b->stride*2);
1831 correlate(s, b, b->ibuf, b->stride, 1, 0);
1835 for(level=0; level<s->spatial_decomposition_count; level++){
1836 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1837 SubBand *b= &p->band[level][orientation];
1839 dequantize(s, b, b->ibuf, b->stride);
1843 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1844 if(s->qlog == LOSSLESS_QLOG){
1847 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1851 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1854 if(pic->pict_type == AV_PICTURE_TYPE_I){
1857 s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x]=
1858 pict->data[plane_index][y*pict->linesize[plane_index] + x];
1862 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1863 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1866 if(s->avctx->flags&CODEC_FLAG_PSNR){
1869 if(pict->data[plane_index]) //FIXME gray hack
1872 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];
1876 s->avctx->error[plane_index] += error;
1877 s->current_picture.error[plane_index] = error;
1882 update_last_header_values(s);
1884 ff_snow_release_buffer(avctx);
1886 s->current_picture.coded_picture_number = avctx->frame_number;
1887 s->current_picture.pict_type = pict->pict_type;
1888 s->current_picture.quality = pict->quality;
1889 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1890 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1891 s->m.current_picture.f.display_picture_number =
1892 s->m.current_picture.f.coded_picture_number = avctx->frame_number;
1893 s->m.current_picture.f.quality = pic->quality;
1894 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1896 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1898 if(avctx->flags&CODEC_FLAG_PASS1)
1899 ff_write_pass1_stats(&s->m);
1900 s->m.last_pict_type = s->m.pict_type;
1901 avctx->frame_bits = s->m.frame_bits;
1902 avctx->mv_bits = s->m.mv_bits;
1903 avctx->misc_bits = s->m.misc_bits;
1904 avctx->p_tex_bits = s->m.p_tex_bits;
1908 pkt->size = ff_rac_terminate(c);
1909 if (avctx->coded_frame->key_frame)
1910 pkt->flags |= AV_PKT_FLAG_KEY;
1916 static av_cold int encode_end(AVCodecContext *avctx)
1918 SnowContext *s = avctx->priv_data;
1920 ff_snow_common_end(s);
1921 if (s->input_picture.data[0])
1922 avctx->release_buffer(avctx, &s->input_picture);
1923 av_free(avctx->stats_out);
1928 #define OFFSET(x) offsetof(SnowContext, x)
1929 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1930 static const AVOption options[] = {
1931 { "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 },
1932 { "no_bitstream", "Skip final bitstream writeout.", OFFSET(no_bitstream), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1936 static const AVClass snowenc_class = {
1937 .class_name = "snow encoder",
1938 .item_name = av_default_item_name,
1940 .version = LIBAVUTIL_VERSION_INT,
1943 AVCodec ff_snow_encoder = {
1945 .type = AVMEDIA_TYPE_VIDEO,
1946 .id = AV_CODEC_ID_SNOW,
1947 .priv_data_size = sizeof(SnowContext),
1948 .init = encode_init,
1949 .encode2 = encode_frame,
1950 .close = encode_end,
1951 .pix_fmts = (const enum AVPixelFormat[]){
1952 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,
1955 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
1956 .priv_class = &snowenc_class,
1965 #include "libavutil/lfg.h"
1966 #include "libavutil/mathematics.h"
1971 int buffer[2][width*height];
1975 s.spatial_decomposition_count=6;
1976 s.spatial_decomposition_type=1;
1978 s.temp_dwt_buffer = av_mallocz(width * sizeof(DWTELEM));
1979 s.temp_idwt_buffer = av_mallocz(width * sizeof(IDWTELEM));
1981 av_lfg_init(&prng, 1);
1983 printf("testing 5/3 DWT\n");
1984 for(i=0; i<width*height; i++)
1985 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1987 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1988 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1990 for(i=0; i<width*height; i++)
1991 if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1993 printf("testing 9/7 DWT\n");
1994 s.spatial_decomposition_type=0;
1995 for(i=0; i<width*height; i++)
1996 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1998 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1999 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2001 for(i=0; i<width*height; i++)
2002 if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
2005 int level, orientation, x, y;
2006 int64_t errors[8][4];
2009 memset(errors, 0, sizeof(errors));
2010 s.spatial_decomposition_count=3;
2011 s.spatial_decomposition_type=0;
2012 for(level=0; level<s.spatial_decomposition_count; level++){
2013 for(orientation=level ? 1 : 0; orientation<4; orientation++){
2014 int w= width >> (s.spatial_decomposition_count-level);
2015 int h= height >> (s.spatial_decomposition_count-level);
2016 int stride= width << (s.spatial_decomposition_count-level);
2017 DWTELEM *buf= buffer[0];
2020 if(orientation&1) buf+=w;
2021 if(orientation>1) buf+=stride>>1;
2023 memset(buffer[0], 0, sizeof(int)*width*height);
2024 buf[w/2 + h/2*stride]= 256*256;
2025 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2026 for(y=0; y<height; y++){
2027 for(x=0; x<width; x++){
2028 int64_t d= buffer[0][x + y*width];
2030 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);
2032 if(FFABS(height/2-y)<9 && level==2) printf("\n");
2034 error= (int)(sqrt(error)+0.5);
2035 errors[level][orientation]= error;
2036 if(g) g=av_gcd(g, error);
2040 printf("static int const visual_weight[][4]={\n");
2041 for(level=0; level<s.spatial_decomposition_count; level++){
2043 for(orientation=0; orientation<4; orientation++){
2044 printf("%8"PRId64",", errors[level][orientation]/g);
2051 int w= width >> (s.spatial_decomposition_count-level);
2052 //int h= height >> (s.spatial_decomposition_count-level);
2053 int stride= width << (s.spatial_decomposition_count-level);
2054 DWTELEM *buf= buffer[0];
2060 memset(buffer[0], 0, sizeof(int)*width*height);
2061 for(y=0; y<height; y++){
2062 for(x=0; x<width; x++){
2063 int tab[4]={0,2,3,1};
2064 buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];
2067 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2068 for(y=0; y<height; y++){
2069 for(x=0; x<width; x++){
2070 int64_t d= buffer[0][x + y*width];
2072 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);
2074 if(FFABS(height/2-y)<9) printf("\n");