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"
29 #include "rangecoder.h"
32 #include "mpegvideo.h"
43 static void find_sse(SnowContext *s, Plane *p, int *score, int score_stride, IDWTELEM *r0, IDWTELEM *r1, int level, int orientation){
44 SubBand *b= &p->band[level][orientation];
48 int step= 1 << (s->spatial_decomposition_count - level);
55 //FIXME bias for nonzero ?
57 memset(score, 0, sizeof(*score)*score_stride*((p->height + Q2_STEP-1)/Q2_STEP));
58 for(y=0; y<p->height; y++){
59 for(x=0; x<p->width; x++){
60 int sx= (x-xo + step/2) / step / Q2_STEP;
61 int sy= (y-yo + step/2) / step / Q2_STEP;
62 int v= r0[x + y*p->width] - r1[x + y*p->width];
63 assert(sx>=0 && sy>=0 && sx < score_stride);
65 score[sx + sy*score_stride] += v*v;
66 assert(score[sx + sy*score_stride] >= 0);
71 static void dequantize_all(SnowContext *s, Plane *p, IDWTELEM *buffer, int width, int height){
72 int level, orientation;
74 for(level=0; level<s->spatial_decomposition_count; level++){
75 for(orientation=level ? 1 : 0; orientation<4; orientation++){
76 SubBand *b= &p->band[level][orientation];
77 IDWTELEM *dst= buffer + (b->ibuf - s->spatial_idwt_buffer);
79 dequantize(s, b, dst, b->stride);
84 static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, int height, int stride, int type){
85 int level, orientation, ys, xs, x, y, pass;
86 IDWTELEM best_dequant[height * stride];
87 IDWTELEM idwt2_buffer[height * stride];
88 const int score_stride= (width + 10)/Q2_STEP;
89 int best_score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
90 int score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
91 int threshold= (s->m.lambda * s->m.lambda) >> 6;
93 //FIXME pass the copy cleanly ?
95 // memcpy(dwt_buffer, buffer, height * stride * sizeof(DWTELEM));
96 ff_spatial_dwt(buffer, width, height, stride, type, s->spatial_decomposition_count);
98 for(level=0; level<s->spatial_decomposition_count; level++){
99 for(orientation=level ? 1 : 0; orientation<4; orientation++){
100 SubBand *b= &p->band[level][orientation];
101 IDWTELEM *dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
102 DWTELEM *src= buffer + (b-> buf - s->spatial_dwt_buffer);
103 assert(src == b->buf); // code does not depend on this but it is true currently
105 quantize(s, b, dst, src, b->stride, s->qbias);
108 for(pass=0; pass<1; pass++){
109 if(s->qbias == 0) //keyframe
111 for(level=0; level<s->spatial_decomposition_count; level++){
112 for(orientation=level ? 1 : 0; orientation<4; orientation++){
113 SubBand *b= &p->band[level][orientation];
114 IDWTELEM *dst= idwt2_buffer + (b->ibuf - s->spatial_idwt_buffer);
115 IDWTELEM *best_dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
117 for(ys= 0; ys<Q2_STEP; ys++){
118 for(xs= 0; xs<Q2_STEP; xs++){
119 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
120 dequantize_all(s, p, idwt2_buffer, width, height);
121 ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
122 find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
123 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
124 for(y=ys; y<b->height; y+= Q2_STEP){
125 for(x=xs; x<b->width; x+= Q2_STEP){
126 if(dst[x + y*b->stride]<0) dst[x + y*b->stride]++;
127 if(dst[x + y*b->stride]>0) dst[x + y*b->stride]--;
128 //FIXME try more than just --
131 dequantize_all(s, p, idwt2_buffer, width, height);
132 ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
133 find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
134 for(y=ys; y<b->height; y+= Q2_STEP){
135 for(x=xs; x<b->width; x+= Q2_STEP){
136 int score_idx= x/Q2_STEP + (y/Q2_STEP)*score_stride;
137 if(score[score_idx] <= best_score[score_idx] + threshold){
138 best_score[score_idx]= score[score_idx];
139 if(best_dst[x + y*b->stride]<0) best_dst[x + y*b->stride]++;
140 if(best_dst[x + y*b->stride]>0) best_dst[x + y*b->stride]--;
150 memcpy(s->spatial_idwt_buffer, best_dequant, height * stride * sizeof(IDWTELEM)); //FIXME work with that directly instead of copy at the end
153 #endif /* QUANTIZE2==1 */
155 #if CONFIG_SNOW_ENCODER
156 static av_cold int encode_init(AVCodecContext *avctx)
158 SnowContext *s = avctx->priv_data;
161 if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
162 av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
163 "Use vstrict=-2 / -strict -2 to use it anyway.\n");
167 if(avctx->prediction_method == DWT_97
168 && (avctx->flags & CODEC_FLAG_QSCALE)
169 && avctx->global_quality == 0){
170 av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
174 s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
176 s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
177 s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
179 for(plane_index=0; plane_index<3; plane_index++){
180 s->plane[plane_index].diag_mc= 1;
181 s->plane[plane_index].htaps= 6;
182 s->plane[plane_index].hcoeff[0]= 40;
183 s->plane[plane_index].hcoeff[1]= -10;
184 s->plane[plane_index].hcoeff[2]= 2;
185 s->plane[plane_index].fast_mc= 1;
188 ff_snow_common_init(avctx);
189 ff_snow_alloc_blocks(s);
194 s->m.flags = avctx->flags;
195 s->m.bit_rate= avctx->bit_rate;
198 s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
199 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
200 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
201 s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
202 h263_encode_init(&s->m); //mv_penalty
204 s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
206 if(avctx->flags&CODEC_FLAG_PASS1){
207 if(!avctx->stats_out)
208 avctx->stats_out = av_mallocz(256);
210 if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
211 if(ff_rate_control_init(&s->m) < 0)
214 s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
216 avctx->coded_frame= &s->current_picture;
217 switch(avctx->pix_fmt){
218 // case PIX_FMT_YUV444P:
219 // case PIX_FMT_YUV422P:
220 case PIX_FMT_YUV420P:
222 // case PIX_FMT_YUV411P:
223 // case PIX_FMT_YUV410P:
224 s->colorspace_type= 0;
226 /* case PIX_FMT_RGB32:
230 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
233 // avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
234 s->chroma_h_shift= 1;
235 s->chroma_v_shift= 1;
237 ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
238 ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
240 s->avctx->get_buffer(s->avctx, &s->input_picture);
242 if(s->avctx->me_method == ME_ITER){
244 int size= s->b_width * s->b_height << 2*s->block_max_depth;
245 for(i=0; i<s->max_ref_frames; i++){
246 s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
247 s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
254 //near copy & paste from dsputil, FIXME
255 static int pix_sum(uint8_t * pix, int line_size, int w)
260 for (i = 0; i < w; i++) {
261 for (j = 0; j < w; j++) {
265 pix += line_size - w;
270 //near copy & paste from dsputil, FIXME
271 static int pix_norm1(uint8_t * pix, int line_size, int w)
274 uint32_t *sq = ff_squareTbl + 256;
277 for (i = 0; i < w; i++) {
278 for (j = 0; j < w; j ++) {
282 pix += line_size - w;
290 #define P_TOPRIGHT P[3]
291 #define P_MEDIAN P[4]
293 #define FLAG_QPEL 1 //must be 1
295 static int encode_q_branch(SnowContext *s, int level, int x, int y){
296 uint8_t p_buffer[1024];
297 uint8_t i_buffer[1024];
298 uint8_t p_state[sizeof(s->block_state)];
299 uint8_t i_state[sizeof(s->block_state)];
301 uint8_t *pbbak= s->c.bytestream;
302 uint8_t *pbbak_start= s->c.bytestream_start;
303 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
304 const int w= s->b_width << s->block_max_depth;
305 const int h= s->b_height << s->block_max_depth;
306 const int rem_depth= s->block_max_depth - level;
307 const int index= (x + y*w) << rem_depth;
308 const int block_w= 1<<(LOG2_MB_SIZE - level);
309 int trx= (x+1)<<rem_depth;
310 int try= (y+1)<<rem_depth;
311 const BlockNode *left = x ? &s->block[index-1] : &null_block;
312 const BlockNode *top = y ? &s->block[index-w] : &null_block;
313 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
314 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
315 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
316 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
317 int pl = left->color[0];
318 int pcb= left->color[1];
319 int pcr= left->color[2];
323 const int stride= s->current_picture.linesize[0];
324 const int uvstride= s->current_picture.linesize[1];
325 uint8_t *current_data[3]= { s->input_picture.data[0] + (x + y* stride)*block_w,
326 s->input_picture.data[1] + (x + y*uvstride)*block_w/2,
327 s->input_picture.data[2] + (x + y*uvstride)*block_w/2};
329 int16_t last_mv[3][2];
330 int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
331 const int shift= 1+qpel;
332 MotionEstContext *c= &s->m.me;
333 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
334 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
335 int my_context= av_log2(2*FFABS(left->my - top->my));
336 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
337 int ref, best_ref, ref_score, ref_mx, ref_my;
339 assert(sizeof(s->block_state) >= 256);
341 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
345 // clip predictors / edge ?
351 P_TOPRIGHT[0]= tr->mx;
352 P_TOPRIGHT[1]= tr->my;
354 last_mv[0][0]= s->block[index].mx;
355 last_mv[0][1]= s->block[index].my;
356 last_mv[1][0]= right->mx;
357 last_mv[1][1]= right->my;
358 last_mv[2][0]= bottom->mx;
359 last_mv[2][1]= bottom->my;
366 assert(c-> stride == stride);
367 assert(c->uvstride == uvstride);
369 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
370 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
371 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
372 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
374 c->xmin = - x*block_w - 16+3;
375 c->ymin = - y*block_w - 16+3;
376 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
377 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
379 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
380 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
381 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
382 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
383 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
384 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
385 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
387 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
388 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
391 c->pred_x= P_LEFT[0];
392 c->pred_y= P_LEFT[1];
394 c->pred_x = P_MEDIAN[0];
395 c->pred_y = P_MEDIAN[1];
400 for(ref=0; ref<s->ref_frames; ref++){
401 init_ref(c, current_data, s->last_picture[ref].data, NULL, block_w*x, block_w*y, 0);
403 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
404 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
406 assert(ref_mx >= c->xmin);
407 assert(ref_mx <= c->xmax);
408 assert(ref_my >= c->ymin);
409 assert(ref_my <= c->ymax);
411 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
412 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
413 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
415 s->ref_mvs[ref][index][0]= ref_mx;
416 s->ref_mvs[ref][index][1]= ref_my;
417 s->ref_scores[ref][index]= ref_score;
419 if(score > ref_score){
426 //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
429 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
432 pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
433 memcpy(p_state, s->block_state, sizeof(s->block_state));
435 if(level!=s->block_max_depth)
436 put_rac(&pc, &p_state[4 + s_context], 1);
437 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
438 if(s->ref_frames > 1)
439 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
440 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
441 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
442 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
443 p_len= pc.bytestream - pc.bytestream_start;
444 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
446 block_s= block_w*block_w;
447 sum = pix_sum(current_data[0], stride, block_w);
448 l= (sum + block_s/2)/block_s;
449 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
451 block_s= block_w*block_w>>2;
452 sum = pix_sum(current_data[1], uvstride, block_w>>1);
453 cb= (sum + block_s/2)/block_s;
454 // iscore += pix_norm1(¤t_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
455 sum = pix_sum(current_data[2], uvstride, block_w>>1);
456 cr= (sum + block_s/2)/block_s;
457 // iscore += pix_norm1(¤t_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
461 ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
462 memcpy(i_state, s->block_state, sizeof(s->block_state));
463 if(level!=s->block_max_depth)
464 put_rac(&ic, &i_state[4 + s_context], 1);
465 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
466 put_symbol(&ic, &i_state[32], l-pl , 1);
467 put_symbol(&ic, &i_state[64], cb-pcb, 1);
468 put_symbol(&ic, &i_state[96], cr-pcr, 1);
469 i_len= ic.bytestream - ic.bytestream_start;
470 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
472 // assert(score==256*256*256*64-1);
473 assert(iscore < 255*255*256 + s->lambda2*10);
475 assert(l>=0 && l<=255);
476 assert(pl>=0 && pl<=255);
479 int varc= iscore >> 8;
480 int vard= score >> 8;
481 if (vard <= 64 || vard < varc)
482 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
484 c->scene_change_score+= s->m.qscale;
487 if(level!=s->block_max_depth){
488 put_rac(&s->c, &s->block_state[4 + s_context], 0);
489 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
490 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
491 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
492 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
493 score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
495 if(score2 < score && score2 < iscore)
500 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
501 memcpy(pbbak, i_buffer, i_len);
503 s->c.bytestream_start= pbbak_start;
504 s->c.bytestream= pbbak + i_len;
505 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
506 memcpy(s->block_state, i_state, sizeof(s->block_state));
509 memcpy(pbbak, p_buffer, p_len);
511 s->c.bytestream_start= pbbak_start;
512 s->c.bytestream= pbbak + p_len;
513 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
514 memcpy(s->block_state, p_state, sizeof(s->block_state));
519 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
520 const int w= s->b_width << s->block_max_depth;
521 const int rem_depth= s->block_max_depth - level;
522 const int index= (x + y*w) << rem_depth;
523 int trx= (x+1)<<rem_depth;
524 BlockNode *b= &s->block[index];
525 const BlockNode *left = x ? &s->block[index-1] : &null_block;
526 const BlockNode *top = y ? &s->block[index-w] : &null_block;
527 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
528 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
529 int pl = left->color[0];
530 int pcb= left->color[1];
531 int pcr= left->color[2];
533 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
534 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
535 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
536 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
539 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
543 if(level!=s->block_max_depth){
544 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
545 put_rac(&s->c, &s->block_state[4 + s_context], 1);
547 put_rac(&s->c, &s->block_state[4 + s_context], 0);
548 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
549 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
550 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
551 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
555 if(b->type & BLOCK_INTRA){
556 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
557 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
558 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
559 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
560 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
561 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
563 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
564 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
565 if(s->ref_frames > 1)
566 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
567 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
568 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
569 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
573 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
575 Plane *p= &s->plane[plane_index];
576 const int block_size = MB_SIZE >> s->block_max_depth;
577 const int block_w = plane_index ? block_size/2 : block_size;
578 const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
579 const int obmc_stride= plane_index ? block_size : 2*block_size;
580 const int ref_stride= s->current_picture.linesize[plane_index];
581 uint8_t *src= s-> input_picture.data[plane_index];
582 IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
583 const int b_stride = s->b_width << s->block_max_depth;
584 const int w= p->width;
585 const int h= p->height;
586 int index= mb_x + mb_y*b_stride;
587 BlockNode *b= &s->block[index];
588 BlockNode backup= *b;
592 b->type|= BLOCK_INTRA;
593 b->color[plane_index]= 0;
594 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
597 int mb_x2= mb_x + (i &1) - 1;
598 int mb_y2= mb_y + (i>>1) - 1;
599 int x= block_w*mb_x2 + block_w/2;
600 int y= block_w*mb_y2 + block_w/2;
602 add_yblock(s, 0, NULL, dst + ((i&1)+(i>>1)*obmc_stride)*block_w, NULL, obmc,
603 x, y, block_w, block_w, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
605 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_w); y2++){
606 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
607 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_w*mb_y - block_w/2))*obmc_stride;
608 int obmc_v= obmc[index];
610 if(y<0) obmc_v += obmc[index + block_w*obmc_stride];
611 if(x<0) obmc_v += obmc[index + block_w];
612 if(y+block_w>h) obmc_v += obmc[index - block_w*obmc_stride];
613 if(x+block_w>w) obmc_v += obmc[index - block_w];
614 //FIXME precalculate this or simplify it somehow else
616 d = -dst[index] + (1<<(FRAC_BITS-1));
618 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
619 aa += obmc_v * obmc_v; //FIXME precalculate this
625 return av_clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255); //FIXME we should not need clipping
628 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
629 const int b_stride = s->b_width << s->block_max_depth;
630 const int b_height = s->b_height<< s->block_max_depth;
631 int index= x + y*b_stride;
632 const BlockNode *b = &s->block[index];
633 const BlockNode *left = x ? &s->block[index-1] : &null_block;
634 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
635 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
636 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
638 // int mx_context= av_log2(2*FFABS(left->mx - top->mx));
639 // int my_context= av_log2(2*FFABS(left->my - top->my));
641 if(x<0 || x>=b_stride || y>=b_height)
650 //FIXME try accurate rate
651 //FIXME intra and inter predictors if surrounding blocks are not the same type
652 if(b->type & BLOCK_INTRA){
653 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
654 + av_log2(2*FFABS(left->color[1] - b->color[1]))
655 + av_log2(2*FFABS(left->color[2] - b->color[2])));
657 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
660 return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
661 + av_log2(2*FFABS(dmy))
662 + av_log2(2*b->ref));
666 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, const uint8_t *obmc_edged){
667 Plane *p= &s->plane[plane_index];
668 const int block_size = MB_SIZE >> s->block_max_depth;
669 const int block_w = plane_index ? block_size/2 : block_size;
670 const int obmc_stride= plane_index ? block_size : 2*block_size;
671 const int ref_stride= s->current_picture.linesize[plane_index];
672 uint8_t *dst= s->current_picture.data[plane_index];
673 uint8_t *src= s-> input_picture.data[plane_index];
674 IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
675 uint8_t *cur = s->scratchbuf;
676 uint8_t tmp[ref_stride*(2*MB_SIZE+HTAPS_MAX-1)];
677 const int b_stride = s->b_width << s->block_max_depth;
678 const int b_height = s->b_height<< s->block_max_depth;
679 const int w= p->width;
680 const int h= p->height;
683 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
684 int sx= block_w*mb_x - block_w/2;
685 int sy= block_w*mb_y - block_w/2;
686 int x0= FFMAX(0,-sx);
687 int y0= FFMAX(0,-sy);
688 int x1= FFMIN(block_w*2, w-sx);
689 int y1= FFMIN(block_w*2, h-sy);
692 ff_snow_pred_block(s, cur, tmp, ref_stride, sx, sy, block_w*2, block_w*2, &s->block[mb_x + mb_y*b_stride], plane_index, w, h);
694 for(y=y0; y<y1; y++){
695 const uint8_t *obmc1= obmc_edged + y*obmc_stride;
696 const IDWTELEM *pred1 = pred + y*obmc_stride;
697 uint8_t *cur1 = cur + y*ref_stride;
698 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
699 for(x=x0; x<x1; x++){
700 #if FRAC_BITS >= LOG2_OBMC_MAX
701 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
703 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
705 v = (v + pred1[x]) >> FRAC_BITS;
706 if(v&(~255)) v= ~(v>>31);
711 /* copy the regions where obmc[] = (uint8_t)256 */
712 if(LOG2_OBMC_MAX == 8
713 && (mb_x == 0 || mb_x == b_stride-1)
714 && (mb_y == 0 || mb_y == b_height-1)){
724 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
728 /* FIXME rearrange dsputil to fit 32x32 cmp functions */
729 /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
730 /* FIXME cmps overlap but do not cover the wavelet's whole support.
731 * So improving the score of one block is not strictly guaranteed
732 * to improve the score of the whole frame, thus iterative motion
733 * estimation does not always converge. */
734 if(s->avctx->me_cmp == FF_CMP_W97)
735 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
736 else if(s->avctx->me_cmp == FF_CMP_W53)
737 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
741 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
742 distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
747 distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
756 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
758 if(mb_x == b_stride-2)
759 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
761 return distortion + rate*penalty_factor;
764 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
766 Plane *p= &s->plane[plane_index];
767 const int block_size = MB_SIZE >> s->block_max_depth;
768 const int block_w = plane_index ? block_size/2 : block_size;
769 const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
770 const int obmc_stride= plane_index ? block_size : 2*block_size;
771 const int ref_stride= s->current_picture.linesize[plane_index];
772 uint8_t *dst= s->current_picture.data[plane_index];
773 uint8_t *src= s-> input_picture.data[plane_index];
774 //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
775 // const has only been removed from zero_dst to suppress a warning
776 static IDWTELEM zero_dst[4096]; //FIXME
777 const int b_stride = s->b_width << s->block_max_depth;
778 const int w= p->width;
779 const int h= p->height;
782 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
785 int mb_x2= mb_x + (i%3) - 1;
786 int mb_y2= mb_y + (i/3) - 1;
787 int x= block_w*mb_x2 + block_w/2;
788 int y= block_w*mb_y2 + block_w/2;
790 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
791 x, y, block_w, block_w, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
793 //FIXME find a cleaner/simpler way to skip the outside stuff
794 for(y2= y; y2<0; y2++)
795 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
796 for(y2= h; y2<y+block_w; y2++)
797 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
799 for(y2= y; y2<y+block_w; y2++)
800 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
803 for(y2= y; y2<y+block_w; y2++)
804 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
807 assert(block_w== 8 || block_w==16);
808 distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_w);
812 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
813 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
821 rate = get_block_bits(s, mb_x, mb_y, 2);
822 for(i=merged?4:0; i<9; i++){
823 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
824 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
827 return distortion + rate*penalty_factor;
830 static int encode_subband_c0run(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
831 const int w= b->width;
832 const int h= b->height;
844 int /*ll=0, */l=0, lt=0, t=0, rt=0;
845 v= src[x + y*stride];
848 t= src[x + (y-1)*stride];
850 lt= src[x - 1 + (y-1)*stride];
853 rt= src[x + 1 + (y-1)*stride];
857 l= src[x - 1 + y*stride];
859 if(orientation==1) ll= src[y + (x-2)*stride];
860 else ll= src[x - 2 + y*stride];
866 if(px<b->parent->width && py<b->parent->height)
867 p= parent[px + py*2*stride];
869 if(!(/*ll|*/l|lt|t|rt|p)){
871 runs[run_index++]= run;
879 max_index= run_index;
880 runs[run_index++]= run;
882 run= runs[run_index++];
884 put_symbol2(&s->c, b->state[30], max_index, 0);
885 if(run_index <= max_index)
886 put_symbol2(&s->c, b->state[1], run, 3);
889 if(s->c.bytestream_end - s->c.bytestream < w*40){
890 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
895 int /*ll=0, */l=0, lt=0, t=0, rt=0;
896 v= src[x + y*stride];
899 t= src[x + (y-1)*stride];
901 lt= src[x - 1 + (y-1)*stride];
904 rt= src[x + 1 + (y-1)*stride];
908 l= src[x - 1 + y*stride];
910 if(orientation==1) ll= src[y + (x-2)*stride];
911 else ll= src[x - 2 + y*stride];
917 if(px<b->parent->width && py<b->parent->height)
918 p= parent[px + py*2*stride];
920 if(/*ll|*/l|lt|t|rt|p){
921 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
923 put_rac(&s->c, &b->state[0][context], !!v);
926 run= runs[run_index++];
928 if(run_index <= max_index)
929 put_symbol2(&s->c, b->state[1], run, 3);
937 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
938 int l2= 2*FFABS(l) + (l<0);
939 int t2= 2*FFABS(t) + (t<0);
941 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
942 put_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l2&0xFF] + 3*quant3bA[t2&0xFF]], v<0);
950 static int encode_subband(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
951 // encode_subband_qtree(s, b, src, parent, stride, orientation);
952 // encode_subband_z0run(s, b, src, parent, stride, orientation);
953 return encode_subband_c0run(s, b, src, parent, stride, orientation);
954 // encode_subband_dzr(s, b, src, parent, stride, orientation);
957 static av_always_inline int check_block(SnowContext *s, int mb_x, int mb_y, int p[3], int intra, const uint8_t *obmc_edged, int *best_rd){
958 const int b_stride= s->b_width << s->block_max_depth;
959 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
960 BlockNode backup= *block;
964 assert(mb_x>=0 && mb_y>=0);
965 assert(mb_x<b_stride);
968 block->color[0] = p[0];
969 block->color[1] = p[1];
970 block->color[2] = p[2];
971 block->type |= BLOCK_INTRA;
973 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
974 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
975 if(s->me_cache[index] == value)
977 s->me_cache[index]= value;
981 block->type &= ~BLOCK_INTRA;
984 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
996 /* special case for int[2] args we discard afterwards,
997 * fixes compilation problem with gcc 2.95 */
998 static av_always_inline int check_block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, const uint8_t *obmc_edged, int *best_rd){
1000 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
1003 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){
1004 const int b_stride= s->b_width << s->block_max_depth;
1005 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
1006 BlockNode backup[4]= {block[0], block[1], block[b_stride], block[b_stride+1]};
1010 assert(mb_x>=0 && mb_y>=0);
1011 assert(mb_x<b_stride);
1012 assert(((mb_x|mb_y)&1) == 0);
1014 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
1015 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
1016 if(s->me_cache[index] == value)
1018 s->me_cache[index]= value;
1023 block->type &= ~BLOCK_INTRA;
1024 block[1]= block[b_stride]= block[b_stride+1]= *block;
1026 rd= get_4block_rd(s, mb_x, mb_y, 0);
1033 block[0]= backup[0];
1034 block[1]= backup[1];
1035 block[b_stride]= backup[2];
1036 block[b_stride+1]= backup[3];
1041 static void iterative_me(SnowContext *s){
1042 int pass, mb_x, mb_y;
1043 const int b_width = s->b_width << s->block_max_depth;
1044 const int b_height= s->b_height << s->block_max_depth;
1045 const int b_stride= b_width;
1049 RangeCoder r = s->c;
1050 uint8_t state[sizeof(s->block_state)];
1051 memcpy(state, s->block_state, sizeof(s->block_state));
1052 for(mb_y= 0; mb_y<s->b_height; mb_y++)
1053 for(mb_x= 0; mb_x<s->b_width; mb_x++)
1054 encode_q_branch(s, 0, mb_x, mb_y);
1056 memcpy(s->block_state, state, sizeof(s->block_state));
1059 for(pass=0; pass<25; pass++){
1062 for(mb_y= 0; mb_y<b_height; mb_y++){
1063 for(mb_x= 0; mb_x<b_width; mb_x++){
1064 int dia_change, i, j, ref;
1065 int best_rd= INT_MAX, ref_rd;
1066 BlockNode backup, ref_b;
1067 const int index= mb_x + mb_y * b_stride;
1068 BlockNode *block= &s->block[index];
1069 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
1070 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
1071 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
1072 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
1073 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
1074 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
1075 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1076 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1077 const int b_w= (MB_SIZE >> s->block_max_depth);
1078 uint8_t obmc_edged[b_w*2][b_w*2];
1080 if(pass && (block->type & BLOCK_OPT))
1082 block->type |= BLOCK_OPT;
1086 if(!s->me_cache_generation)
1087 memset(s->me_cache, 0, sizeof(s->me_cache));
1088 s->me_cache_generation += 1<<22;
1090 //FIXME precalculate
1093 memcpy(obmc_edged, obmc_tab[s->block_max_depth], b_w*b_w*4);
1095 for(y=0; y<b_w*2; y++)
1096 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1097 if(mb_x==b_stride-1)
1098 for(y=0; y<b_w*2; y++)
1099 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1101 for(x=0; x<b_w*2; x++)
1102 obmc_edged[0][x] += obmc_edged[b_w-1][x];
1103 for(y=1; y<b_w; y++)
1104 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1106 if(mb_y==b_height-1){
1107 for(x=0; x<b_w*2; x++)
1108 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1109 for(y=b_w; y<b_w*2-1; y++)
1110 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1114 //skip stuff outside the picture
1115 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1116 uint8_t *src= s-> input_picture.data[0];
1117 uint8_t *dst= s->current_picture.data[0];
1118 const int stride= s->current_picture.linesize[0];
1119 const int block_w= MB_SIZE >> s->block_max_depth;
1120 const int sx= block_w*mb_x - block_w/2;
1121 const int sy= block_w*mb_y - block_w/2;
1122 const int w= s->plane[0].width;
1123 const int h= s->plane[0].height;
1127 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1128 for(y=h; y<sy+block_w*2; y++)
1129 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1131 for(y=sy; y<sy+block_w*2; y++)
1132 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1134 if(sx+block_w*2 > w){
1135 for(y=sy; y<sy+block_w*2; y++)
1136 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1140 // intra(black) = neighbors' contribution to the current block
1142 color[i]= get_dc(s, mb_x, mb_y, i);
1144 // get previous score (cannot be cached due to OBMC)
1145 if(pass > 0 && (block->type&BLOCK_INTRA)){
1146 int color0[3]= {block->color[0], block->color[1], block->color[2]};
1147 check_block(s, mb_x, mb_y, color0, 1, *obmc_edged, &best_rd);
1149 check_block_inter(s, mb_x, mb_y, block->mx, block->my, *obmc_edged, &best_rd);
1153 for(ref=0; ref < s->ref_frames; ref++){
1154 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1155 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1160 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], *obmc_edged, &best_rd);
1161 check_block_inter(s, mb_x, mb_y, 0, 0, *obmc_edged, &best_rd);
1163 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], *obmc_edged, &best_rd);
1165 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], *obmc_edged, &best_rd);
1167 check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], *obmc_edged, &best_rd);
1169 check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], *obmc_edged, &best_rd);
1172 //FIXME avoid subpel interpolation / round to nearest integer
1175 for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
1177 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
1178 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
1179 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
1180 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
1186 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1189 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], *obmc_edged, &best_rd);
1191 //FIXME or try the standard 2 pass qpel or similar
1193 mvr[0][0]= block->mx;
1194 mvr[0][1]= block->my;
1195 if(ref_rd > best_rd){
1202 check_block(s, mb_x, mb_y, color, 1, *obmc_edged, &best_rd);
1203 //FIXME RD style color selection
1204 if(!same_block(block, &backup)){
1205 if(tb ) tb ->type &= ~BLOCK_OPT;
1206 if(lb ) lb ->type &= ~BLOCK_OPT;
1207 if(rb ) rb ->type &= ~BLOCK_OPT;
1208 if(bb ) bb ->type &= ~BLOCK_OPT;
1209 if(tlb) tlb->type &= ~BLOCK_OPT;
1210 if(trb) trb->type &= ~BLOCK_OPT;
1211 if(blb) blb->type &= ~BLOCK_OPT;
1212 if(brb) brb->type &= ~BLOCK_OPT;
1217 av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
1222 if(s->block_max_depth == 1){
1224 for(mb_y= 0; mb_y<b_height; mb_y+=2){
1225 for(mb_x= 0; mb_x<b_width; mb_x+=2){
1227 int best_rd, init_rd;
1228 const int index= mb_x + mb_y * b_stride;
1231 b[0]= &s->block[index];
1233 b[2]= b[0]+b_stride;
1235 if(same_block(b[0], b[1]) &&
1236 same_block(b[0], b[2]) &&
1237 same_block(b[0], b[3]))
1240 if(!s->me_cache_generation)
1241 memset(s->me_cache, 0, sizeof(s->me_cache));
1242 s->me_cache_generation += 1<<22;
1244 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1246 //FIXME more multiref search?
1247 check_4block_inter(s, mb_x, mb_y,
1248 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1249 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1252 if(!(b[i]->type&BLOCK_INTRA))
1253 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1255 if(init_rd != best_rd)
1259 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1263 static void encode_blocks(SnowContext *s, int search){
1268 if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
1272 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1273 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1277 if(s->avctx->me_method == ME_ITER || !search)
1278 encode_q_branch2(s, 0, x, y);
1280 encode_q_branch (s, 0, x, y);
1285 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1286 const int w= b->width;
1287 const int h= b->height;
1288 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1289 const int qmul= qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1290 int x,y, thres1, thres2;
1292 if(s->qlog == LOSSLESS_QLOG){
1295 dst[x + y*stride]= src[x + y*stride];
1299 bias= bias ? 0 : (3*qmul)>>3;
1300 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1306 int i= src[x + y*stride];
1308 if((unsigned)(i+thres1) > thres2){
1311 i/= qmul; //FIXME optimize
1312 dst[x + y*stride]= i;
1316 i/= qmul; //FIXME optimize
1317 dst[x + y*stride]= -i;
1320 dst[x + y*stride]= 0;
1326 int i= src[x + y*stride];
1328 if((unsigned)(i+thres1) > thres2){
1331 i= (i + bias) / qmul; //FIXME optimize
1332 dst[x + y*stride]= i;
1336 i= (i + bias) / qmul; //FIXME optimize
1337 dst[x + y*stride]= -i;
1340 dst[x + y*stride]= 0;
1346 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1347 const int w= b->width;
1348 const int h= b->height;
1349 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1350 const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1351 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1354 if(s->qlog == LOSSLESS_QLOG) return;
1358 int i= src[x + y*stride];
1360 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1362 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1368 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1369 const int w= b->width;
1370 const int h= b->height;
1373 for(y=h-1; y>=0; y--){
1374 for(x=w-1; x>=0; x--){
1375 int i= x + y*stride;
1379 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1380 else src[i] -= src[i - 1];
1382 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1383 else src[i] -= src[i - 1];
1386 if(y) src[i] -= src[i - stride];
1392 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1393 const int w= b->width;
1394 const int h= b->height;
1399 int i= x + y*stride;
1403 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1404 else src[i] += src[i - 1];
1406 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1407 else src[i] += src[i - 1];
1410 if(y) src[i] += src[i - stride];
1416 static void encode_qlogs(SnowContext *s){
1417 int plane_index, level, orientation;
1419 for(plane_index=0; plane_index<2; plane_index++){
1420 for(level=0; level<s->spatial_decomposition_count; level++){
1421 for(orientation=level ? 1:0; orientation<4; orientation++){
1422 if(orientation==2) continue;
1423 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1429 static void encode_header(SnowContext *s){
1433 memset(kstate, MID_STATE, sizeof(kstate));
1435 put_rac(&s->c, kstate, s->keyframe);
1436 if(s->keyframe || s->always_reset){
1437 ff_snow_reset_contexts(s);
1438 s->last_spatial_decomposition_type=
1442 s->last_block_max_depth= 0;
1443 for(plane_index=0; plane_index<2; plane_index++){
1444 Plane *p= &s->plane[plane_index];
1447 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1451 put_symbol(&s->c, s->header_state, s->version, 0);
1452 put_rac(&s->c, s->header_state, s->always_reset);
1453 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1454 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1455 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1456 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1457 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1458 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1459 put_rac(&s->c, s->header_state, s->spatial_scalability);
1460 // put_rac(&s->c, s->header_state, s->rate_scalability);
1461 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1468 for(plane_index=0; plane_index<2; plane_index++){
1469 Plane *p= &s->plane[plane_index];
1470 update_mc |= p->last_htaps != p->htaps;
1471 update_mc |= p->last_diag_mc != p->diag_mc;
1472 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1474 put_rac(&s->c, s->header_state, update_mc);
1476 for(plane_index=0; plane_index<2; plane_index++){
1477 Plane *p= &s->plane[plane_index];
1478 put_rac(&s->c, s->header_state, p->diag_mc);
1479 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1480 for(i= p->htaps/2; i; i--)
1481 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1484 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1485 put_rac(&s->c, s->header_state, 1);
1486 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1489 put_rac(&s->c, s->header_state, 0);
1492 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1493 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
1494 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
1495 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
1496 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1500 static void update_last_header_values(SnowContext *s){
1504 for(plane_index=0; plane_index<2; plane_index++){
1505 Plane *p= &s->plane[plane_index];
1506 p->last_diag_mc= p->diag_mc;
1507 p->last_htaps = p->htaps;
1508 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1512 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
1513 s->last_qlog = s->qlog;
1514 s->last_qbias = s->qbias;
1515 s->last_mv_scale = s->mv_scale;
1516 s->last_block_max_depth = s->block_max_depth;
1517 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1520 static int qscale2qlog(int qscale){
1521 return rint(QROOT*log(qscale / (float)FF_QP2LAMBDA)/log(2))
1522 + 61*QROOT/8; ///< 64 > 60
1525 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1527 /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1528 * FIXME we know exact mv bits at this point,
1529 * but ratecontrol isn't set up to include them. */
1530 uint32_t coef_sum= 0;
1531 int level, orientation, delta_qlog;
1533 for(level=0; level<s->spatial_decomposition_count; level++){
1534 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1535 SubBand *b= &s->plane[0].band[level][orientation];
1536 IDWTELEM *buf= b->ibuf;
1537 const int w= b->width;
1538 const int h= b->height;
1539 const int stride= b->stride;
1540 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1541 const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1542 const int qdiv= (1<<16)/qmul;
1544 //FIXME this is ugly
1547 buf[x+y*stride]= b->buf[x+y*stride];
1549 decorrelate(s, b, buf, stride, 1, 0);
1552 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1556 /* ugly, ratecontrol just takes a sqrt again */
1557 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1558 assert(coef_sum < INT_MAX);
1560 if(pict->pict_type == AV_PICTURE_TYPE_I){
1561 s->m.current_picture.mb_var_sum= coef_sum;
1562 s->m.current_picture.mc_mb_var_sum= 0;
1564 s->m.current_picture.mc_mb_var_sum= coef_sum;
1565 s->m.current_picture.mb_var_sum= 0;
1568 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1569 if (pict->quality < 0)
1571 s->lambda= pict->quality * 3/2;
1572 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1573 s->qlog+= delta_qlog;
1577 static void calculate_visual_weight(SnowContext *s, Plane *p){
1578 int width = p->width;
1579 int height= p->height;
1580 int level, orientation, x, y;
1582 for(level=0; level<s->spatial_decomposition_count; level++){
1583 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1584 SubBand *b= &p->band[level][orientation];
1585 IDWTELEM *ibuf= b->ibuf;
1588 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1589 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1590 ff_spatial_idwt(s->spatial_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1591 for(y=0; y<height; y++){
1592 for(x=0; x<width; x++){
1593 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1598 b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
1603 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
1604 SnowContext *s = avctx->priv_data;
1605 RangeCoder * const c= &s->c;
1606 AVFrame *pict = data;
1607 const int width= s->avctx->width;
1608 const int height= s->avctx->height;
1609 int level, orientation, plane_index, i, y;
1610 uint8_t rc_header_bak[sizeof(s->header_state)];
1611 uint8_t rc_block_bak[sizeof(s->block_state)];
1613 ff_init_range_encoder(c, buf, buf_size);
1614 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1618 for(y=0; y<(height>>shift); y++)
1619 memcpy(&s->input_picture.data[i][y * s->input_picture.linesize[i]],
1620 &pict->data[i][y * pict->linesize[i]],
1623 s->new_picture = *pict;
1625 s->m.picture_number= avctx->frame_number;
1626 if(avctx->flags&CODEC_FLAG_PASS2){
1628 pict->pict_type= s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1629 s->keyframe= pict->pict_type==AV_PICTURE_TYPE_I;
1630 if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
1631 pict->quality= ff_rate_estimate_qscale(&s->m, 0);
1632 if (pict->quality < 0)
1636 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1638 pict->pict_type= s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1641 if(s->pass1_rc && avctx->frame_number == 0)
1642 pict->quality= 2*FF_QP2LAMBDA;
1644 s->qlog= qscale2qlog(pict->quality);
1645 s->lambda = pict->quality * 3/2;
1647 if(s->qlog < 0 || (!pict->quality && (avctx->flags & CODEC_FLAG_QSCALE))){
1648 s->qlog= LOSSLESS_QLOG;
1650 }//else keep previous frame's qlog until after motion estimation
1652 ff_snow_frame_start(s);
1654 s->m.current_picture_ptr= &s->m.current_picture;
1655 s->m.last_picture.f.pts = s->m.current_picture.f.pts;
1656 s->m.current_picture.f.pts = pict->pts;
1657 if(pict->pict_type == AV_PICTURE_TYPE_P){
1658 int block_width = (width +15)>>4;
1659 int block_height= (height+15)>>4;
1660 int stride= s->current_picture.linesize[0];
1662 assert(s->current_picture.data[0]);
1663 assert(s->last_picture[0].data[0]);
1665 s->m.avctx= s->avctx;
1666 s->m.current_picture.f.data[0] = s->current_picture.data[0];
1667 s->m. last_picture.f.data[0] = s->last_picture[0].data[0];
1668 s->m. new_picture.f.data[0] = s-> input_picture.data[0];
1669 s->m. last_picture_ptr= &s->m. last_picture;
1671 s->m. last_picture.f.linesize[0] =
1672 s->m. new_picture.f.linesize[0] =
1673 s->m.current_picture.f.linesize[0] = stride;
1674 s->m.uvlinesize= s->current_picture.linesize[1];
1676 s->m.height= height;
1677 s->m.mb_width = block_width;
1678 s->m.mb_height= block_height;
1679 s->m.mb_stride= s->m.mb_width+1;
1680 s->m.b8_stride= 2*s->m.mb_width+1;
1682 s->m.pict_type= pict->pict_type;
1683 s->m.me_method= s->avctx->me_method;
1684 s->m.me.scene_change_score=0;
1685 s->m.flags= s->avctx->flags;
1686 s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
1687 s->m.out_format= FMT_H263;
1688 s->m.unrestricted_mv= 1;
1690 s->m.lambda = s->lambda;
1691 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1692 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1694 s->m.dsp= s->dsp; //move
1700 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1701 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1706 if(pict->pict_type == AV_PICTURE_TYPE_I)
1707 s->spatial_decomposition_count= 5;
1709 s->spatial_decomposition_count= 5;
1711 s->m.pict_type = pict->pict_type;
1712 s->qbias= pict->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
1714 ff_snow_common_init_after_header(avctx);
1716 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1717 for(plane_index=0; plane_index<3; plane_index++){
1718 calculate_visual_weight(s, &s->plane[plane_index]);
1723 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1724 encode_blocks(s, 1);
1725 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1727 for(plane_index=0; plane_index<3; plane_index++){
1728 Plane *p= &s->plane[plane_index];
1732 // int bits= put_bits_count(&s->c.pb);
1734 if (!s->memc_only) {
1736 if(pict->data[plane_index]) //FIXME gray hack
1739 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1742 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1745 && pict->pict_type == AV_PICTURE_TYPE_P
1746 && !(avctx->flags&CODEC_FLAG_PASS2)
1747 && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
1748 ff_init_range_encoder(c, buf, buf_size);
1749 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1750 pict->pict_type= AV_PICTURE_TYPE_I;
1752 s->current_picture.key_frame=1;
1756 if(s->qlog == LOSSLESS_QLOG){
1759 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1765 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1771 dwt_quantize(s, p, s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type);
1773 ff_spatial_dwt(s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1775 if(s->pass1_rc && plane_index==0){
1776 int delta_qlog = ratecontrol_1pass(s, pict);
1777 if (delta_qlog <= INT_MIN)
1780 //reordering qlog in the bitstream would eliminate this reset
1781 ff_init_range_encoder(c, buf, buf_size);
1782 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
1783 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
1785 encode_blocks(s, 0);
1789 for(level=0; level<s->spatial_decomposition_count; level++){
1790 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1791 SubBand *b= &p->band[level][orientation];
1794 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1796 decorrelate(s, b, b->ibuf, b->stride, pict->pict_type == AV_PICTURE_TYPE_P, 0);
1797 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1798 assert(b->parent==NULL || b->parent->stride == b->stride*2);
1800 correlate(s, b, b->ibuf, b->stride, 1, 0);
1804 for(level=0; level<s->spatial_decomposition_count; level++){
1805 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1806 SubBand *b= &p->band[level][orientation];
1808 dequantize(s, b, b->ibuf, b->stride);
1812 ff_spatial_idwt(s->spatial_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1813 if(s->qlog == LOSSLESS_QLOG){
1816 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1820 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1823 if(pict->pict_type == AV_PICTURE_TYPE_I){
1826 s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x]=
1827 pict->data[plane_index][y*pict->linesize[plane_index] + x];
1831 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1832 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1835 if(s->avctx->flags&CODEC_FLAG_PSNR){
1838 if(pict->data[plane_index]) //FIXME gray hack
1841 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];
1845 s->avctx->error[plane_index] += error;
1846 s->current_picture.error[plane_index] = error;
1851 update_last_header_values(s);
1853 ff_snow_release_buffer(avctx);
1855 s->current_picture.coded_picture_number = avctx->frame_number;
1856 s->current_picture.pict_type = pict->pict_type;
1857 s->current_picture.quality = pict->quality;
1858 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1859 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1860 s->m.current_picture.f.display_picture_number =
1861 s->m.current_picture.f.coded_picture_number = avctx->frame_number;
1862 s->m.current_picture.f.quality = pict->quality;
1863 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1865 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1867 if(avctx->flags&CODEC_FLAG_PASS1)
1868 ff_write_pass1_stats(&s->m);
1869 s->m.last_pict_type = s->m.pict_type;
1870 avctx->frame_bits = s->m.frame_bits;
1871 avctx->mv_bits = s->m.mv_bits;
1872 avctx->misc_bits = s->m.misc_bits;
1873 avctx->p_tex_bits = s->m.p_tex_bits;
1877 return ff_rac_terminate(c);
1880 static av_cold int encode_end(AVCodecContext *avctx)
1882 SnowContext *s = avctx->priv_data;
1884 ff_snow_common_end(s);
1885 if (s->input_picture.data[0])
1886 avctx->release_buffer(avctx, &s->input_picture);
1887 av_free(avctx->stats_out);
1892 #define OFFSET(x) offsetof(SnowContext, x)
1893 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1894 static const AVOption options[] = {
1895 { "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
1899 static const AVClass snowenc_class = {
1900 .class_name = "snow encoder",
1901 .item_name = av_default_item_name,
1903 .version = LIBAVUTIL_VERSION_INT,
1906 AVCodec ff_snow_encoder = {
1908 .type = AVMEDIA_TYPE_VIDEO,
1909 .id = CODEC_ID_SNOW,
1910 .priv_data_size = sizeof(SnowContext),
1911 .init = encode_init,
1912 .encode = encode_frame,
1913 .close = encode_end,
1914 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
1915 .priv_class = &snowenc_class,
1925 #include "libavutil/lfg.h"
1926 #include "libavutil/mathematics.h"
1931 int buffer[2][width*height];
1935 s.spatial_decomposition_count=6;
1936 s.spatial_decomposition_type=1;
1938 av_lfg_init(&prng, 1);
1940 printf("testing 5/3 DWT\n");
1941 for(i=0; i<width*height; i++)
1942 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1944 ff_spatial_dwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1945 ff_spatial_idwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1947 for(i=0; i<width*height; i++)
1948 if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1950 printf("testing 9/7 DWT\n");
1951 s.spatial_decomposition_type=0;
1952 for(i=0; i<width*height; i++)
1953 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1955 ff_spatial_dwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1956 ff_spatial_idwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1958 for(i=0; i<width*height; i++)
1959 if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1962 int level, orientation, x, y;
1963 int64_t errors[8][4];
1966 memset(errors, 0, sizeof(errors));
1967 s.spatial_decomposition_count=3;
1968 s.spatial_decomposition_type=0;
1969 for(level=0; level<s.spatial_decomposition_count; level++){
1970 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1971 int w= width >> (s.spatial_decomposition_count-level);
1972 int h= height >> (s.spatial_decomposition_count-level);
1973 int stride= width << (s.spatial_decomposition_count-level);
1974 DWTELEM *buf= buffer[0];
1977 if(orientation&1) buf+=w;
1978 if(orientation>1) buf+=stride>>1;
1980 memset(buffer[0], 0, sizeof(int)*width*height);
1981 buf[w/2 + h/2*stride]= 256*256;
1982 ff_spatial_idwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1983 for(y=0; y<height; y++){
1984 for(x=0; x<width; x++){
1985 int64_t d= buffer[0][x + y*width];
1987 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);
1989 if(FFABS(height/2-y)<9 && level==2) printf("\n");
1991 error= (int)(sqrt(error)+0.5);
1992 errors[level][orientation]= error;
1993 if(g) g=av_gcd(g, error);
1997 printf("static int const visual_weight[][4]={\n");
1998 for(level=0; level<s.spatial_decomposition_count; level++){
2000 for(orientation=0; orientation<4; orientation++){
2001 printf("%8"PRId64",", errors[level][orientation]/g);
2008 int w= width >> (s.spatial_decomposition_count-level);
2009 //int h= height >> (s.spatial_decomposition_count-level);
2010 int stride= width << (s.spatial_decomposition_count-level);
2011 DWTELEM *buf= buffer[0];
2017 memset(buffer[0], 0, sizeof(int)*width*height);
2018 for(y=0; y<height; y++){
2019 for(x=0; x<width; x++){
2020 int tab[4]={0,2,3,1};
2021 buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];
2024 ff_spatial_dwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2025 for(y=0; y<height; y++){
2026 for(x=0; x<width; x++){
2027 int64_t d= buffer[0][x + y*width];
2029 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);
2031 if(FFABS(height/2-y)<9) printf("\n");