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"
35 static av_cold int encode_init(AVCodecContext *avctx)
37 SnowContext *s = avctx->priv_data;
41 if(avctx->prediction_method == DWT_97
42 && (avctx->flags & CODEC_FLAG_QSCALE)
43 && avctx->global_quality == 0){
44 av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
48 s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
50 s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
51 s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
53 for(plane_index=0; plane_index<3; plane_index++){
54 s->plane[plane_index].diag_mc= 1;
55 s->plane[plane_index].htaps= 6;
56 s->plane[plane_index].hcoeff[0]= 40;
57 s->plane[plane_index].hcoeff[1]= -10;
58 s->plane[plane_index].hcoeff[2]= 2;
59 s->plane[plane_index].fast_mc= 1;
62 if ((ret = ff_snow_common_init(avctx)) < 0) {
63 ff_snow_common_end(avctx->priv_data);
66 ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
68 ff_snow_alloc_blocks(s);
73 s->m.flags = avctx->flags;
74 s->m.bit_rate= avctx->bit_rate;
77 s->m.me.scratchpad= av_mallocz_array((avctx->width+64), 2*16*2*sizeof(uint8_t));
78 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
79 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
80 s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
81 if (!s->m.me.scratchpad || !s->m.me.map || !s->m.me.score_map || !s->m.obmc_scratchpad)
82 return AVERROR(ENOMEM);
84 ff_h263_encode_init(&s->m); //mv_penalty
86 s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
88 if(avctx->flags&CODEC_FLAG_PASS1){
90 avctx->stats_out = av_mallocz(256);
92 if (!avctx->stats_out)
93 return AVERROR(ENOMEM);
95 if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
96 if(ff_rate_control_init(&s->m) < 0)
99 s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
101 switch(avctx->pix_fmt){
102 case AV_PIX_FMT_YUV444P:
103 // case AV_PIX_FMT_YUV422P:
104 case AV_PIX_FMT_YUV420P:
105 // case AV_PIX_FMT_YUV411P:
106 case AV_PIX_FMT_YUV410P:
108 s->colorspace_type= 0;
110 case AV_PIX_FMT_GRAY8:
112 s->colorspace_type = 1;
114 /* case AV_PIX_FMT_RGB32:
118 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
121 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
123 ff_set_cmp(&s->mecc, s->mecc.me_cmp, s->avctx->me_cmp);
124 ff_set_cmp(&s->mecc, s->mecc.me_sub_cmp, s->avctx->me_sub_cmp);
126 s->input_picture = av_frame_alloc();
127 avctx->coded_frame = av_frame_alloc();
128 if (!s->input_picture || !avctx->coded_frame)
129 return AVERROR(ENOMEM);
131 if ((ret = ff_snow_get_buffer(s, s->input_picture)) < 0)
134 if(s->avctx->me_method == ME_ITER){
135 int size= s->b_width * s->b_height << 2*s->block_max_depth;
136 for(i=0; i<s->max_ref_frames; i++){
137 s->ref_mvs[i]= av_mallocz_array(size, sizeof(int16_t[2]));
138 s->ref_scores[i]= av_mallocz_array(size, sizeof(uint32_t));
139 if (!s->ref_mvs[i] || !s->ref_scores[i])
140 return AVERROR(ENOMEM);
147 //near copy & paste from dsputil, FIXME
148 static int pix_sum(uint8_t * pix, int line_size, int w, int h)
153 for (i = 0; i < h; i++) {
154 for (j = 0; j < w; j++) {
158 pix += line_size - w;
163 //near copy & paste from dsputil, FIXME
164 static int pix_norm1(uint8_t * pix, int line_size, int w)
167 uint32_t *sq = ff_square_tab + 256;
170 for (i = 0; i < w; i++) {
171 for (j = 0; j < w; j ++) {
175 pix += line_size - w;
180 static inline int get_penalty_factor(int lambda, int lambda2, int type){
184 return lambda>>FF_LAMBDA_SHIFT;
186 return (3*lambda)>>(FF_LAMBDA_SHIFT+1);
188 return (4*lambda)>>(FF_LAMBDA_SHIFT);
190 return (2*lambda)>>(FF_LAMBDA_SHIFT);
193 return (2*lambda)>>FF_LAMBDA_SHIFT;
198 return lambda2>>FF_LAMBDA_SHIFT;
207 #define P_TOPRIGHT P[3]
208 #define P_MEDIAN P[4]
210 #define FLAG_QPEL 1 //must be 1
212 static int encode_q_branch(SnowContext *s, int level, int x, int y){
213 uint8_t p_buffer[1024];
214 uint8_t i_buffer[1024];
215 uint8_t p_state[sizeof(s->block_state)];
216 uint8_t i_state[sizeof(s->block_state)];
218 uint8_t *pbbak= s->c.bytestream;
219 uint8_t *pbbak_start= s->c.bytestream_start;
220 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
221 const int w= s->b_width << s->block_max_depth;
222 const int h= s->b_height << s->block_max_depth;
223 const int rem_depth= s->block_max_depth - level;
224 const int index= (x + y*w) << rem_depth;
225 const int block_w= 1<<(LOG2_MB_SIZE - level);
226 int trx= (x+1)<<rem_depth;
227 int try= (y+1)<<rem_depth;
228 const BlockNode *left = x ? &s->block[index-1] : &null_block;
229 const BlockNode *top = y ? &s->block[index-w] : &null_block;
230 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
231 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
232 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
233 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
234 int pl = left->color[0];
235 int pcb= left->color[1];
236 int pcr= left->color[2];
240 const int stride= s->current_picture->linesize[0];
241 const int uvstride= s->current_picture->linesize[1];
242 uint8_t *current_data[3]= { s->input_picture->data[0] + (x + y* stride)*block_w,
243 s->input_picture->data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
244 s->input_picture->data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
246 int16_t last_mv[3][2];
247 int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
248 const int shift= 1+qpel;
249 MotionEstContext *c= &s->m.me;
250 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
251 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
252 int my_context= av_log2(2*FFABS(left->my - top->my));
253 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
254 int ref, best_ref, ref_score, ref_mx, ref_my;
256 av_assert0(sizeof(s->block_state) >= 256);
258 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
262 // clip predictors / edge ?
268 P_TOPRIGHT[0]= tr->mx;
269 P_TOPRIGHT[1]= tr->my;
271 last_mv[0][0]= s->block[index].mx;
272 last_mv[0][1]= s->block[index].my;
273 last_mv[1][0]= right->mx;
274 last_mv[1][1]= right->my;
275 last_mv[2][0]= bottom->mx;
276 last_mv[2][1]= bottom->my;
283 av_assert1(c-> stride == stride);
284 av_assert1(c->uvstride == uvstride);
286 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
287 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
288 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
289 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
291 c->xmin = - x*block_w - 16+3;
292 c->ymin = - y*block_w - 16+3;
293 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
294 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
296 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
297 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
298 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
299 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
300 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
301 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
302 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
304 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
305 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
308 c->pred_x= P_LEFT[0];
309 c->pred_y= P_LEFT[1];
311 c->pred_x = P_MEDIAN[0];
312 c->pred_y = P_MEDIAN[1];
317 for(ref=0; ref<s->ref_frames; ref++){
318 init_ref(c, current_data, s->last_picture[ref]->data, NULL, block_w*x, block_w*y, 0);
320 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
321 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
323 av_assert2(ref_mx >= c->xmin);
324 av_assert2(ref_mx <= c->xmax);
325 av_assert2(ref_my >= c->ymin);
326 av_assert2(ref_my <= c->ymax);
328 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
329 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
330 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
332 s->ref_mvs[ref][index][0]= ref_mx;
333 s->ref_mvs[ref][index][1]= ref_my;
334 s->ref_scores[ref][index]= ref_score;
336 if(score > ref_score){
343 //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
346 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
349 pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
350 memcpy(p_state, s->block_state, sizeof(s->block_state));
352 if(level!=s->block_max_depth)
353 put_rac(&pc, &p_state[4 + s_context], 1);
354 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
355 if(s->ref_frames > 1)
356 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
357 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
358 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
359 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
360 p_len= pc.bytestream - pc.bytestream_start;
361 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
363 block_s= block_w*block_w;
364 sum = pix_sum(current_data[0], stride, block_w, block_w);
365 l= (sum + block_s/2)/block_s;
366 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
368 if (s->nb_planes > 2) {
369 block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
370 sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
371 cb= (sum + block_s/2)/block_s;
372 // iscore += pix_norm1(¤t_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
373 sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
374 cr= (sum + block_s/2)/block_s;
375 // iscore += pix_norm1(¤t_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
381 ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
382 memcpy(i_state, s->block_state, sizeof(s->block_state));
383 if(level!=s->block_max_depth)
384 put_rac(&ic, &i_state[4 + s_context], 1);
385 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
386 put_symbol(&ic, &i_state[32], l-pl , 1);
387 if (s->nb_planes > 2) {
388 put_symbol(&ic, &i_state[64], cb-pcb, 1);
389 put_symbol(&ic, &i_state[96], cr-pcr, 1);
391 i_len= ic.bytestream - ic.bytestream_start;
392 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
394 av_assert1(iscore < 255*255*256 + s->lambda2*10);
395 av_assert1(iscore >= 0);
396 av_assert1(l>=0 && l<=255);
397 av_assert1(pl>=0 && pl<=255);
400 int varc= iscore >> 8;
401 int vard= score >> 8;
402 if (vard <= 64 || vard < varc)
403 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
405 c->scene_change_score+= s->m.qscale;
408 if(level!=s->block_max_depth){
409 put_rac(&s->c, &s->block_state[4 + s_context], 0);
410 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
411 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
412 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
413 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
414 score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
416 if(score2 < score && score2 < iscore)
421 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
422 memcpy(pbbak, i_buffer, i_len);
424 s->c.bytestream_start= pbbak_start;
425 s->c.bytestream= pbbak + i_len;
426 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
427 memcpy(s->block_state, i_state, sizeof(s->block_state));
430 memcpy(pbbak, p_buffer, p_len);
432 s->c.bytestream_start= pbbak_start;
433 s->c.bytestream= pbbak + p_len;
434 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
435 memcpy(s->block_state, p_state, sizeof(s->block_state));
440 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
441 const int w= s->b_width << s->block_max_depth;
442 const int rem_depth= s->block_max_depth - level;
443 const int index= (x + y*w) << rem_depth;
444 int trx= (x+1)<<rem_depth;
445 BlockNode *b= &s->block[index];
446 const BlockNode *left = x ? &s->block[index-1] : &null_block;
447 const BlockNode *top = y ? &s->block[index-w] : &null_block;
448 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
449 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
450 int pl = left->color[0];
451 int pcb= left->color[1];
452 int pcr= left->color[2];
454 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
455 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
456 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
457 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
460 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
464 if(level!=s->block_max_depth){
465 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
466 put_rac(&s->c, &s->block_state[4 + s_context], 1);
468 put_rac(&s->c, &s->block_state[4 + s_context], 0);
469 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
470 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
471 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
472 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
476 if(b->type & BLOCK_INTRA){
477 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
478 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
479 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
480 if (s->nb_planes > 2) {
481 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
482 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
484 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
486 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
487 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
488 if(s->ref_frames > 1)
489 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
490 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
491 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
492 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
496 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
498 Plane *p= &s->plane[plane_index];
499 const int block_size = MB_SIZE >> s->block_max_depth;
500 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
501 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
502 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
503 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
504 const int ref_stride= s->current_picture->linesize[plane_index];
505 uint8_t *src= s-> input_picture->data[plane_index];
506 IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
507 const int b_stride = s->b_width << s->block_max_depth;
508 const int w= p->width;
509 const int h= p->height;
510 int index= mb_x + mb_y*b_stride;
511 BlockNode *b= &s->block[index];
512 BlockNode backup= *b;
516 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
518 b->type|= BLOCK_INTRA;
519 b->color[plane_index]= 0;
520 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
523 int mb_x2= mb_x + (i &1) - 1;
524 int mb_y2= mb_y + (i>>1) - 1;
525 int x= block_w*mb_x2 + block_w/2;
526 int y= block_h*mb_y2 + block_h/2;
528 add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
529 x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
531 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
532 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
533 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
534 int obmc_v= obmc[index];
536 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
537 if(x<0) obmc_v += obmc[index + block_w];
538 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
539 if(x+block_w>w) obmc_v += obmc[index - block_w];
540 //FIXME precalculate this or simplify it somehow else
542 d = -dst[index] + (1<<(FRAC_BITS-1));
544 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
545 aa += obmc_v * obmc_v; //FIXME precalculate this
551 return av_clip_uint8( ROUNDED_DIV(ab<<LOG2_OBMC_MAX, aa) ); //FIXME we should not need clipping
554 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
555 const int b_stride = s->b_width << s->block_max_depth;
556 const int b_height = s->b_height<< s->block_max_depth;
557 int index= x + y*b_stride;
558 const BlockNode *b = &s->block[index];
559 const BlockNode *left = x ? &s->block[index-1] : &null_block;
560 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
561 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
562 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
564 // int mx_context= av_log2(2*FFABS(left->mx - top->mx));
565 // int my_context= av_log2(2*FFABS(left->my - top->my));
567 if(x<0 || x>=b_stride || y>=b_height)
576 //FIXME try accurate rate
577 //FIXME intra and inter predictors if surrounding blocks are not the same type
578 if(b->type & BLOCK_INTRA){
579 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
580 + av_log2(2*FFABS(left->color[1] - b->color[1]))
581 + av_log2(2*FFABS(left->color[2] - b->color[2])));
583 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
586 return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
587 + av_log2(2*FFABS(dmy))
588 + av_log2(2*b->ref));
592 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){
593 Plane *p= &s->plane[plane_index];
594 const int block_size = MB_SIZE >> s->block_max_depth;
595 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
596 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
597 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
598 const int ref_stride= s->current_picture->linesize[plane_index];
599 uint8_t *dst= s->current_picture->data[plane_index];
600 uint8_t *src= s-> input_picture->data[plane_index];
601 IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
602 uint8_t *cur = s->scratchbuf;
603 uint8_t *tmp = s->emu_edge_buffer;
604 const int b_stride = s->b_width << s->block_max_depth;
605 const int b_height = s->b_height<< s->block_max_depth;
606 const int w= p->width;
607 const int h= p->height;
610 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
611 int sx= block_w*mb_x - block_w/2;
612 int sy= block_h*mb_y - block_h/2;
613 int x0= FFMAX(0,-sx);
614 int y0= FFMAX(0,-sy);
615 int x1= FFMIN(block_w*2, w-sx);
616 int y1= FFMIN(block_h*2, h-sy);
619 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
621 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);
623 for(y=y0; y<y1; y++){
624 const uint8_t *obmc1= obmc_edged[y];
625 const IDWTELEM *pred1 = pred + y*obmc_stride;
626 uint8_t *cur1 = cur + y*ref_stride;
627 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
628 for(x=x0; x<x1; x++){
629 #if FRAC_BITS >= LOG2_OBMC_MAX
630 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
632 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
634 v = (v + pred1[x]) >> FRAC_BITS;
635 if(v&(~255)) v= ~(v>>31);
640 /* copy the regions where obmc[] = (uint8_t)256 */
641 if(LOG2_OBMC_MAX == 8
642 && (mb_x == 0 || mb_x == b_stride-1)
643 && (mb_y == 0 || mb_y == b_height-1)){
653 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
657 /* FIXME rearrange dsputil to fit 32x32 cmp functions */
658 /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
659 /* FIXME cmps overlap but do not cover the wavelet's whole support.
660 * So improving the score of one block is not strictly guaranteed
661 * to improve the score of the whole frame, thus iterative motion
662 * estimation does not always converge. */
663 if(s->avctx->me_cmp == FF_CMP_W97)
664 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
665 else if(s->avctx->me_cmp == FF_CMP_W53)
666 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
670 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
671 distortion += s->mecc.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
675 av_assert2(block_w==8);
676 distortion = s->mecc.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
685 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
687 if(mb_x == b_stride-2)
688 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
690 return distortion + rate*penalty_factor;
693 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
695 Plane *p= &s->plane[plane_index];
696 const int block_size = MB_SIZE >> s->block_max_depth;
697 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
698 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
699 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
700 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
701 const int ref_stride= s->current_picture->linesize[plane_index];
702 uint8_t *dst= s->current_picture->data[plane_index];
703 uint8_t *src= s-> input_picture->data[plane_index];
704 //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
705 // const has only been removed from zero_dst to suppress a warning
706 static IDWTELEM zero_dst[4096]; //FIXME
707 const int b_stride = s->b_width << s->block_max_depth;
708 const int w= p->width;
709 const int h= p->height;
712 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
714 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
717 int mb_x2= mb_x + (i%3) - 1;
718 int mb_y2= mb_y + (i/3) - 1;
719 int x= block_w*mb_x2 + block_w/2;
720 int y= block_h*mb_y2 + block_h/2;
722 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
723 x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
725 //FIXME find a cleaner/simpler way to skip the outside stuff
726 for(y2= y; y2<0; y2++)
727 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
728 for(y2= h; y2<y+block_h; y2++)
729 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
731 for(y2= y; y2<y+block_h; y2++)
732 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
735 for(y2= y; y2<y+block_h; y2++)
736 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
739 av_assert1(block_w== 8 || block_w==16);
740 distortion += s->mecc.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
744 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
745 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
753 rate = get_block_bits(s, mb_x, mb_y, 2);
754 for(i=merged?4:0; i<9; i++){
755 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
756 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
759 return distortion + rate*penalty_factor;
762 static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
763 const int w= b->width;
764 const int h= b->height;
769 int *runs = s->run_buffer;
776 int /*ll=0, */l=0, lt=0, t=0, rt=0;
777 v= src[x + y*stride];
780 t= src[x + (y-1)*stride];
782 lt= src[x - 1 + (y-1)*stride];
785 rt= src[x + 1 + (y-1)*stride];
789 l= src[x - 1 + y*stride];
791 if(orientation==1) ll= src[y + (x-2)*stride];
792 else ll= src[x - 2 + y*stride];
798 if(px<b->parent->width && py<b->parent->height)
799 p= parent[px + py*2*stride];
801 if(!(/*ll|*/l|lt|t|rt|p)){
803 runs[run_index++]= run;
811 max_index= run_index;
812 runs[run_index++]= run;
814 run= runs[run_index++];
816 put_symbol2(&s->c, b->state[30], max_index, 0);
817 if(run_index <= max_index)
818 put_symbol2(&s->c, b->state[1], run, 3);
821 if(s->c.bytestream_end - s->c.bytestream < w*40){
822 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
827 int /*ll=0, */l=0, lt=0, t=0, rt=0;
828 v= src[x + y*stride];
831 t= src[x + (y-1)*stride];
833 lt= src[x - 1 + (y-1)*stride];
836 rt= src[x + 1 + (y-1)*stride];
840 l= src[x - 1 + y*stride];
842 if(orientation==1) ll= src[y + (x-2)*stride];
843 else ll= src[x - 2 + y*stride];
849 if(px<b->parent->width && py<b->parent->height)
850 p= parent[px + py*2*stride];
852 if(/*ll|*/l|lt|t|rt|p){
853 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
855 put_rac(&s->c, &b->state[0][context], !!v);
858 run= runs[run_index++];
860 if(run_index <= max_index)
861 put_symbol2(&s->c, b->state[1], run, 3);
869 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
870 int l2= 2*FFABS(l) + (l<0);
871 int t2= 2*FFABS(t) + (t<0);
873 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
874 put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
882 static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
883 // encode_subband_qtree(s, b, src, parent, stride, orientation);
884 // encode_subband_z0run(s, b, src, parent, stride, orientation);
885 return encode_subband_c0run(s, b, src, parent, stride, orientation);
886 // encode_subband_dzr(s, b, src, parent, stride, orientation);
889 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){
890 const int b_stride= s->b_width << s->block_max_depth;
891 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
892 BlockNode backup= *block;
896 av_assert2(mb_x>=0 && mb_y>=0);
897 av_assert2(mb_x<b_stride);
900 block->color[0] = p[0];
901 block->color[1] = p[1];
902 block->color[2] = p[2];
903 block->type |= BLOCK_INTRA;
905 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
906 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
907 if(s->me_cache[index] == value)
909 s->me_cache[index]= value;
913 block->type &= ~BLOCK_INTRA;
916 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
928 /* special case for int[2] args we discard afterwards,
929 * fixes compilation problem with gcc 2.95 */
930 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){
932 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
935 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){
936 const int b_stride= s->b_width << s->block_max_depth;
937 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
942 /* We don't initialize backup[] during variable declaration, because
943 * that fails to compile on MSVC: "cannot convert from 'BlockNode' to
945 backup[0] = block[0];
946 backup[1] = block[1];
947 backup[2] = block[b_stride];
948 backup[3] = block[b_stride + 1];
950 av_assert2(mb_x>=0 && mb_y>=0);
951 av_assert2(mb_x<b_stride);
952 av_assert2(((mb_x|mb_y)&1) == 0);
954 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
955 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
956 if(s->me_cache[index] == value)
958 s->me_cache[index]= value;
963 block->type &= ~BLOCK_INTRA;
964 block[1]= block[b_stride]= block[b_stride+1]= *block;
966 rd= get_4block_rd(s, mb_x, mb_y, 0);
975 block[b_stride]= backup[2];
976 block[b_stride+1]= backup[3];
981 static void iterative_me(SnowContext *s){
982 int pass, mb_x, mb_y;
983 const int b_width = s->b_width << s->block_max_depth;
984 const int b_height= s->b_height << s->block_max_depth;
985 const int b_stride= b_width;
990 uint8_t state[sizeof(s->block_state)];
991 memcpy(state, s->block_state, sizeof(s->block_state));
992 for(mb_y= 0; mb_y<s->b_height; mb_y++)
993 for(mb_x= 0; mb_x<s->b_width; mb_x++)
994 encode_q_branch(s, 0, mb_x, mb_y);
996 memcpy(s->block_state, state, sizeof(s->block_state));
999 for(pass=0; pass<25; pass++){
1002 for(mb_y= 0; mb_y<b_height; mb_y++){
1003 for(mb_x= 0; mb_x<b_width; mb_x++){
1004 int dia_change, i, j, ref;
1005 int best_rd= INT_MAX, ref_rd;
1006 BlockNode backup, ref_b;
1007 const int index= mb_x + mb_y * b_stride;
1008 BlockNode *block= &s->block[index];
1009 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
1010 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
1011 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
1012 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
1013 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
1014 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
1015 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1016 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1017 const int b_w= (MB_SIZE >> s->block_max_depth);
1018 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
1020 if(pass && (block->type & BLOCK_OPT))
1022 block->type |= BLOCK_OPT;
1026 if(!s->me_cache_generation)
1027 memset(s->me_cache, 0, sizeof(s->me_cache));
1028 s->me_cache_generation += 1<<22;
1030 //FIXME precalculate
1033 for (y = 0; y < b_w * 2; y++)
1034 memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
1036 for(y=0; y<b_w*2; y++)
1037 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1038 if(mb_x==b_stride-1)
1039 for(y=0; y<b_w*2; y++)
1040 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1042 for(x=0; x<b_w*2; x++)
1043 obmc_edged[0][x] += obmc_edged[b_w-1][x];
1044 for(y=1; y<b_w; y++)
1045 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1047 if(mb_y==b_height-1){
1048 for(x=0; x<b_w*2; x++)
1049 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1050 for(y=b_w; y<b_w*2-1; y++)
1051 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1055 //skip stuff outside the picture
1056 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1057 uint8_t *src= s-> input_picture->data[0];
1058 uint8_t *dst= s->current_picture->data[0];
1059 const int stride= s->current_picture->linesize[0];
1060 const int block_w= MB_SIZE >> s->block_max_depth;
1061 const int block_h= MB_SIZE >> s->block_max_depth;
1062 const int sx= block_w*mb_x - block_w/2;
1063 const int sy= block_h*mb_y - block_h/2;
1064 const int w= s->plane[0].width;
1065 const int h= s->plane[0].height;
1069 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1070 for(y=h; y<sy+block_h*2; y++)
1071 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1073 for(y=sy; y<sy+block_h*2; y++)
1074 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1076 if(sx+block_w*2 > w){
1077 for(y=sy; y<sy+block_h*2; y++)
1078 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1082 // intra(black) = neighbors' contribution to the current block
1083 for(i=0; i < s->nb_planes; i++)
1084 color[i]= get_dc(s, mb_x, mb_y, i);
1086 // get previous score (cannot be cached due to OBMC)
1087 if(pass > 0 && (block->type&BLOCK_INTRA)){
1088 int color0[3]= {block->color[0], block->color[1], block->color[2]};
1089 check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);
1091 check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
1095 for(ref=0; ref < s->ref_frames; ref++){
1096 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1097 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1102 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
1103 check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
1105 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
1107 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);
1109 check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);
1111 check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
1114 //FIXME avoid subpel interpolation / round to nearest integer
1117 for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
1119 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1120 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1121 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1122 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1128 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1131 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
1133 //FIXME or try the standard 2 pass qpel or similar
1135 mvr[0][0]= block->mx;
1136 mvr[0][1]= block->my;
1137 if(ref_rd > best_rd){
1144 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);
1145 //FIXME RD style color selection
1146 if(!same_block(block, &backup)){
1147 if(tb ) tb ->type &= ~BLOCK_OPT;
1148 if(lb ) lb ->type &= ~BLOCK_OPT;
1149 if(rb ) rb ->type &= ~BLOCK_OPT;
1150 if(bb ) bb ->type &= ~BLOCK_OPT;
1151 if(tlb) tlb->type &= ~BLOCK_OPT;
1152 if(trb) trb->type &= ~BLOCK_OPT;
1153 if(blb) blb->type &= ~BLOCK_OPT;
1154 if(brb) brb->type &= ~BLOCK_OPT;
1159 av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
1164 if(s->block_max_depth == 1){
1166 for(mb_y= 0; mb_y<b_height; mb_y+=2){
1167 for(mb_x= 0; mb_x<b_width; mb_x+=2){
1169 int best_rd, init_rd;
1170 const int index= mb_x + mb_y * b_stride;
1173 b[0]= &s->block[index];
1175 b[2]= b[0]+b_stride;
1177 if(same_block(b[0], b[1]) &&
1178 same_block(b[0], b[2]) &&
1179 same_block(b[0], b[3]))
1182 if(!s->me_cache_generation)
1183 memset(s->me_cache, 0, sizeof(s->me_cache));
1184 s->me_cache_generation += 1<<22;
1186 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1188 //FIXME more multiref search?
1189 check_4block_inter(s, mb_x, mb_y,
1190 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1191 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1194 if(!(b[i]->type&BLOCK_INTRA))
1195 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1197 if(init_rd != best_rd)
1201 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1205 static void encode_blocks(SnowContext *s, int search){
1210 if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
1214 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1215 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1219 if(s->avctx->me_method == ME_ITER || !search)
1220 encode_q_branch2(s, 0, x, y);
1222 encode_q_branch (s, 0, x, y);
1227 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1228 const int w= b->width;
1229 const int h= b->height;
1230 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1231 const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1232 int x,y, thres1, thres2;
1234 if(s->qlog == LOSSLESS_QLOG){
1237 dst[x + y*stride]= src[x + y*stride];
1241 bias= bias ? 0 : (3*qmul)>>3;
1242 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1248 int i= src[x + y*stride];
1250 if((unsigned)(i+thres1) > thres2){
1253 i/= qmul; //FIXME optimize
1254 dst[x + y*stride]= i;
1258 i/= qmul; //FIXME optimize
1259 dst[x + y*stride]= -i;
1262 dst[x + y*stride]= 0;
1268 int i= src[x + y*stride];
1270 if((unsigned)(i+thres1) > thres2){
1273 i= (i + bias) / qmul; //FIXME optimize
1274 dst[x + y*stride]= i;
1278 i= (i + bias) / qmul; //FIXME optimize
1279 dst[x + y*stride]= -i;
1282 dst[x + y*stride]= 0;
1288 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1289 const int w= b->width;
1290 const int h= b->height;
1291 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1292 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1293 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1296 if(s->qlog == LOSSLESS_QLOG) return;
1300 int i= src[x + y*stride];
1302 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1304 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1310 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1311 const int w= b->width;
1312 const int h= b->height;
1315 for(y=h-1; y>=0; y--){
1316 for(x=w-1; x>=0; x--){
1317 int i= x + y*stride;
1321 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1322 else src[i] -= src[i - 1];
1324 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1325 else src[i] -= src[i - 1];
1328 if(y) src[i] -= src[i - stride];
1334 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1335 const int w= b->width;
1336 const int h= b->height;
1341 int i= x + y*stride;
1345 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1346 else src[i] += src[i - 1];
1348 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1349 else src[i] += src[i - 1];
1352 if(y) src[i] += src[i - stride];
1358 static void encode_qlogs(SnowContext *s){
1359 int plane_index, level, orientation;
1361 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1362 for(level=0; level<s->spatial_decomposition_count; level++){
1363 for(orientation=level ? 1:0; orientation<4; orientation++){
1364 if(orientation==2) continue;
1365 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1371 static void encode_header(SnowContext *s){
1375 memset(kstate, MID_STATE, sizeof(kstate));
1377 put_rac(&s->c, kstate, s->keyframe);
1378 if(s->keyframe || s->always_reset){
1379 ff_snow_reset_contexts(s);
1380 s->last_spatial_decomposition_type=
1384 s->last_block_max_depth= 0;
1385 for(plane_index=0; plane_index<2; plane_index++){
1386 Plane *p= &s->plane[plane_index];
1389 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1393 put_symbol(&s->c, s->header_state, s->version, 0);
1394 put_rac(&s->c, s->header_state, s->always_reset);
1395 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1396 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1397 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1398 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1399 if (s->nb_planes > 2) {
1400 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1401 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1403 put_rac(&s->c, s->header_state, s->spatial_scalability);
1404 // put_rac(&s->c, s->header_state, s->rate_scalability);
1405 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1412 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1413 Plane *p= &s->plane[plane_index];
1414 update_mc |= p->last_htaps != p->htaps;
1415 update_mc |= p->last_diag_mc != p->diag_mc;
1416 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1418 put_rac(&s->c, s->header_state, update_mc);
1420 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1421 Plane *p= &s->plane[plane_index];
1422 put_rac(&s->c, s->header_state, p->diag_mc);
1423 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1424 for(i= p->htaps/2; i; i--)
1425 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1428 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1429 put_rac(&s->c, s->header_state, 1);
1430 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1433 put_rac(&s->c, s->header_state, 0);
1436 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1437 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
1438 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
1439 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
1440 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1444 static void update_last_header_values(SnowContext *s){
1448 for(plane_index=0; plane_index<2; plane_index++){
1449 Plane *p= &s->plane[plane_index];
1450 p->last_diag_mc= p->diag_mc;
1451 p->last_htaps = p->htaps;
1452 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1456 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
1457 s->last_qlog = s->qlog;
1458 s->last_qbias = s->qbias;
1459 s->last_mv_scale = s->mv_scale;
1460 s->last_block_max_depth = s->block_max_depth;
1461 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1464 static int qscale2qlog(int qscale){
1465 return rint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))
1466 + 61*QROOT/8; ///< 64 > 60
1469 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1471 /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1472 * FIXME we know exact mv bits at this point,
1473 * but ratecontrol isn't set up to include them. */
1474 uint32_t coef_sum= 0;
1475 int level, orientation, delta_qlog;
1477 for(level=0; level<s->spatial_decomposition_count; level++){
1478 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1479 SubBand *b= &s->plane[0].band[level][orientation];
1480 IDWTELEM *buf= b->ibuf;
1481 const int w= b->width;
1482 const int h= b->height;
1483 const int stride= b->stride;
1484 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1485 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1486 const int qdiv= (1<<16)/qmul;
1488 //FIXME this is ugly
1491 buf[x+y*stride]= b->buf[x+y*stride];
1493 decorrelate(s, b, buf, stride, 1, 0);
1496 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1500 /* ugly, ratecontrol just takes a sqrt again */
1501 av_assert0(coef_sum < INT_MAX);
1502 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1504 if(pict->pict_type == AV_PICTURE_TYPE_I){
1505 s->m.current_picture.mb_var_sum= coef_sum;
1506 s->m.current_picture.mc_mb_var_sum= 0;
1508 s->m.current_picture.mc_mb_var_sum= coef_sum;
1509 s->m.current_picture.mb_var_sum= 0;
1512 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1513 if (pict->quality < 0)
1515 s->lambda= pict->quality * 3/2;
1516 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1517 s->qlog+= delta_qlog;
1521 static void calculate_visual_weight(SnowContext *s, Plane *p){
1522 int width = p->width;
1523 int height= p->height;
1524 int level, orientation, x, y;
1526 for(level=0; level<s->spatial_decomposition_count; level++){
1527 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1528 SubBand *b= &p->band[level][orientation];
1529 IDWTELEM *ibuf= b->ibuf;
1532 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1533 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1534 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1535 for(y=0; y<height; y++){
1536 for(x=0; x<width; x++){
1537 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1542 b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
1547 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1548 const AVFrame *pict, int *got_packet)
1550 SnowContext *s = avctx->priv_data;
1551 RangeCoder * const c= &s->c;
1552 AVFrame *pic = pict;
1553 const int width= s->avctx->width;
1554 const int height= s->avctx->height;
1555 int level, orientation, plane_index, i, y, ret;
1556 uint8_t rc_header_bak[sizeof(s->header_state)];
1557 uint8_t rc_block_bak[sizeof(s->block_state)];
1559 if ((ret = ff_alloc_packet2(avctx, pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + FF_MIN_BUFFER_SIZE)) < 0)
1562 ff_init_range_encoder(c, pkt->data, pkt->size);
1563 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1565 for(i=0; i < s->nb_planes; i++){
1566 int hshift= i ? s->chroma_h_shift : 0;
1567 int vshift= i ? s->chroma_v_shift : 0;
1568 for(y=0; y<(height>>vshift); y++)
1569 memcpy(&s->input_picture->data[i][y * s->input_picture->linesize[i]],
1570 &pict->data[i][y * pict->linesize[i]],
1572 s->mpvencdsp.draw_edges(s->input_picture->data[i], s->input_picture->linesize[i],
1573 width >> hshift, height >> vshift,
1574 EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
1575 EDGE_TOP | EDGE_BOTTOM);
1579 s->new_picture = pict;
1581 s->m.picture_number= avctx->frame_number;
1582 if(avctx->flags&CODEC_FLAG_PASS2){
1583 s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1584 s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
1585 if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
1586 pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1587 if (pic->quality < 0)
1591 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1592 s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1595 if(s->pass1_rc && avctx->frame_number == 0)
1596 pic->quality = 2*FF_QP2LAMBDA;
1598 s->qlog = qscale2qlog(pic->quality);
1599 s->lambda = pic->quality * 3/2;
1601 if (s->qlog < 0 || (!pic->quality && (avctx->flags & CODEC_FLAG_QSCALE))) {
1602 s->qlog= LOSSLESS_QLOG;
1604 }//else keep previous frame's qlog until after motion estimation
1606 if (s->current_picture->data[0] && !(s->avctx->flags&CODEC_FLAG_EMU_EDGE)) {
1607 int w = s->avctx->width;
1608 int h = s->avctx->height;
1610 s->mpvencdsp.draw_edges(s->current_picture->data[0],
1611 s->current_picture->linesize[0], w , h ,
1612 EDGE_WIDTH , EDGE_WIDTH , EDGE_TOP | EDGE_BOTTOM);
1613 if (s->current_picture->data[2]) {
1614 s->mpvencdsp.draw_edges(s->current_picture->data[1],
1615 s->current_picture->linesize[1], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
1616 EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
1617 s->mpvencdsp.draw_edges(s->current_picture->data[2],
1618 s->current_picture->linesize[2], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
1619 EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
1623 ff_snow_frame_start(s);
1624 av_frame_unref(avctx->coded_frame);
1625 av_frame_ref(avctx->coded_frame, s->current_picture);
1627 s->m.current_picture_ptr= &s->m.current_picture;
1628 s->m.current_picture.f = s->current_picture;
1629 s->m.current_picture.f->pts = pict->pts;
1630 if(pic->pict_type == AV_PICTURE_TYPE_P){
1631 int block_width = (width +15)>>4;
1632 int block_height= (height+15)>>4;
1633 int stride= s->current_picture->linesize[0];
1635 av_assert0(s->current_picture->data[0]);
1636 av_assert0(s->last_picture[0]->data[0]);
1638 s->m.avctx= s->avctx;
1639 s->m. last_picture.f = s->last_picture[0];
1640 s->m. new_picture.f = s->input_picture;
1641 s->m. last_picture_ptr= &s->m. last_picture;
1642 s->m.linesize = stride;
1643 s->m.uvlinesize= s->current_picture->linesize[1];
1645 s->m.height= height;
1646 s->m.mb_width = block_width;
1647 s->m.mb_height= block_height;
1648 s->m.mb_stride= s->m.mb_width+1;
1649 s->m.b8_stride= 2*s->m.mb_width+1;
1651 s->m.pict_type = pic->pict_type;
1652 s->m.me_method= s->avctx->me_method;
1653 s->m.me.scene_change_score=0;
1654 s->m.flags= s->avctx->flags;
1655 s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
1656 s->m.out_format= FMT_H263;
1657 s->m.unrestricted_mv= 1;
1659 s->m.lambda = s->lambda;
1660 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1661 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1663 s->m.mecc= s->mecc; //move
1664 s->m.qdsp= s->qdsp; //move
1665 s->m.hdsp = s->hdsp;
1667 s->hdsp = s->m.hdsp;
1672 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1673 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1678 s->spatial_decomposition_count= 5;
1680 while( !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
1681 || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
1682 s->spatial_decomposition_count--;
1684 if (s->spatial_decomposition_count <= 0) {
1685 av_log(avctx, AV_LOG_ERROR, "Resolution too low\n");
1686 return AVERROR(EINVAL);
1689 s->m.pict_type = pic->pict_type;
1690 s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
1692 ff_snow_common_init_after_header(avctx);
1694 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1695 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1696 calculate_visual_weight(s, &s->plane[plane_index]);
1701 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1702 encode_blocks(s, 1);
1703 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1705 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1706 Plane *p= &s->plane[plane_index];
1710 // int bits= put_bits_count(&s->c.pb);
1712 if (!s->memc_only) {
1714 if(pict->data[plane_index]) //FIXME gray hack
1717 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1720 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1723 && pic->pict_type == AV_PICTURE_TYPE_P
1724 && !(avctx->flags&CODEC_FLAG_PASS2)
1725 && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
1726 ff_init_range_encoder(c, pkt->data, pkt->size);
1727 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1728 pic->pict_type= AV_PICTURE_TYPE_I;
1730 s->current_picture->key_frame=1;
1734 if(s->qlog == LOSSLESS_QLOG){
1737 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1743 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1748 ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1750 if(s->pass1_rc && plane_index==0){
1751 int delta_qlog = ratecontrol_1pass(s, pic);
1752 if (delta_qlog <= INT_MIN)
1755 //reordering qlog in the bitstream would eliminate this reset
1756 ff_init_range_encoder(c, pkt->data, pkt->size);
1757 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
1758 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
1760 encode_blocks(s, 0);
1764 for(level=0; level<s->spatial_decomposition_count; level++){
1765 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1766 SubBand *b= &p->band[level][orientation];
1768 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1770 decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
1771 if (!s->no_bitstream)
1772 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1773 av_assert0(b->parent==NULL || b->parent->stride == b->stride*2);
1775 correlate(s, b, b->ibuf, b->stride, 1, 0);
1779 for(level=0; level<s->spatial_decomposition_count; level++){
1780 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1781 SubBand *b= &p->band[level][orientation];
1783 dequantize(s, b, b->ibuf, b->stride);
1787 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1788 if(s->qlog == LOSSLESS_QLOG){
1791 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1795 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1798 if(pic->pict_type == AV_PICTURE_TYPE_I){
1801 s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x]=
1802 pict->data[plane_index][y*pict->linesize[plane_index] + x];
1806 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1807 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1810 if(s->avctx->flags&CODEC_FLAG_PSNR){
1813 if(pict->data[plane_index]) //FIXME gray hack
1816 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];
1820 s->avctx->error[plane_index] += error;
1821 s->current_picture->error[plane_index] = error;
1826 update_last_header_values(s);
1828 ff_snow_release_buffer(avctx);
1830 s->current_picture->coded_picture_number = avctx->frame_number;
1831 s->current_picture->pict_type = pict->pict_type;
1832 s->current_picture->quality = pict->quality;
1833 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1834 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1835 s->m.current_picture.f->display_picture_number =
1836 s->m.current_picture.f->coded_picture_number = avctx->frame_number;
1837 s->m.current_picture.f->quality = pic->quality;
1838 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1840 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1842 if(avctx->flags&CODEC_FLAG_PASS1)
1843 ff_write_pass1_stats(&s->m);
1844 s->m.last_pict_type = s->m.pict_type;
1845 avctx->frame_bits = s->m.frame_bits;
1846 avctx->mv_bits = s->m.mv_bits;
1847 avctx->misc_bits = s->m.misc_bits;
1848 avctx->p_tex_bits = s->m.p_tex_bits;
1852 pkt->size = ff_rac_terminate(c);
1853 if (avctx->coded_frame->key_frame)
1854 pkt->flags |= AV_PKT_FLAG_KEY;
1860 static av_cold int encode_end(AVCodecContext *avctx)
1862 SnowContext *s = avctx->priv_data;
1864 ff_snow_common_end(s);
1865 ff_rate_control_uninit(&s->m);
1866 av_frame_free(&s->input_picture);
1867 av_frame_free(&avctx->coded_frame);
1868 av_freep(&avctx->stats_out);
1873 #define OFFSET(x) offsetof(SnowContext, x)
1874 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1875 static const AVOption options[] = {
1877 { "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 },
1878 { "no_bitstream", "Skip final bitstream writeout.", OFFSET(no_bitstream), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1882 static const AVClass snowenc_class = {
1883 .class_name = "snow encoder",
1884 .item_name = av_default_item_name,
1886 .version = LIBAVUTIL_VERSION_INT,
1889 AVCodec ff_snow_encoder = {
1891 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
1892 .type = AVMEDIA_TYPE_VIDEO,
1893 .id = AV_CODEC_ID_SNOW,
1894 .priv_data_size = sizeof(SnowContext),
1895 .init = encode_init,
1896 .encode2 = encode_frame,
1897 .close = encode_end,
1898 .pix_fmts = (const enum AVPixelFormat[]){
1899 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,
1903 .priv_class = &snowenc_class,
1912 #include "libavutil/lfg.h"
1913 #include "libavutil/mathematics.h"
1918 int buffer[2][width*height];
1922 s.spatial_decomposition_count=6;
1923 s.spatial_decomposition_type=1;
1925 s.temp_dwt_buffer = av_mallocz_array(width, sizeof(DWTELEM));
1926 s.temp_idwt_buffer = av_mallocz_array(width, sizeof(IDWTELEM));
1928 if (!s.temp_dwt_buffer || !s.temp_idwt_buffer) {
1929 fprintf(stderr, "Failed to allocate memory\n");
1933 av_lfg_init(&prng, 1);
1935 printf("testing 5/3 DWT\n");
1936 for(i=0; i<width*height; i++)
1937 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1939 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1940 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1942 for(i=0; i<width*height; i++)
1943 if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1945 printf("testing 9/7 DWT\n");
1946 s.spatial_decomposition_type=0;
1947 for(i=0; i<width*height; i++)
1948 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1950 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1951 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1953 for(i=0; i<width*height; i++)
1954 if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1957 int level, orientation, x, y;
1958 int64_t errors[8][4];
1961 memset(errors, 0, sizeof(errors));
1962 s.spatial_decomposition_count=3;
1963 s.spatial_decomposition_type=0;
1964 for(level=0; level<s.spatial_decomposition_count; level++){
1965 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1966 int w= width >> (s.spatial_decomposition_count-level);
1967 int h= height >> (s.spatial_decomposition_count-level);
1968 int stride= width << (s.spatial_decomposition_count-level);
1969 DWTELEM *buf= buffer[0];
1972 if(orientation&1) buf+=w;
1973 if(orientation>1) buf+=stride>>1;
1975 memset(buffer[0], 0, sizeof(int)*width*height);
1976 buf[w/2 + h/2*stride]= 256*256;
1977 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1978 for(y=0; y<height; y++){
1979 for(x=0; x<width; x++){
1980 int64_t d= buffer[0][x + y*width];
1982 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);
1984 if(FFABS(height/2-y)<9 && level==2) printf("\n");
1986 error= (int)(sqrt(error)+0.5);
1987 errors[level][orientation]= error;
1988 if(g) g=av_gcd(g, error);
1992 printf("static int const visual_weight[][4]={\n");
1993 for(level=0; level<s.spatial_decomposition_count; level++){
1995 for(orientation=0; orientation<4; orientation++){
1996 printf("%8"PRId64",", errors[level][orientation]/g);
2003 int w= width >> (s.spatial_decomposition_count-level);
2004 //int h= height >> (s.spatial_decomposition_count-level);
2005 int stride= width << (s.spatial_decomposition_count-level);
2006 DWTELEM *buf= buffer[0];
2012 memset(buffer[0], 0, sizeof(int)*width*height);
2013 for(y=0; y<height; y++){
2014 for(x=0; x<width; x++){
2015 int tab[4]={0,2,3,1};
2016 buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];
2019 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2020 for(y=0; y<height; y++){
2021 for(x=0; x<width; x++){
2022 int64_t d= buffer[0][x + y*width];
2024 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);
2026 if(FFABS(height/2-y)<9) printf("\n");