2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/intmath.h"
22 #include "libavutil/log.h"
23 #include "libavutil/opt.h"
30 #include "rangecoder.h"
33 #include "mpegvideo.h"
36 static av_cold int encode_init(AVCodecContext *avctx)
38 SnowContext *s = avctx->priv_data;
41 if(avctx->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_snow_alloc_blocks(s);
71 s->m.flags = avctx->flags;
72 s->m.bit_rate= avctx->bit_rate;
75 s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
76 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
77 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
78 s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
79 if (!s->m.me.scratchpad || !s->m.me.map || !s->m.me.score_map || !s->m.obmc_scratchpad)
80 return AVERROR(ENOMEM);
82 ff_h263_encode_init(&s->m); //mv_penalty
84 s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
86 if(avctx->flags&CODEC_FLAG_PASS1){
88 avctx->stats_out = av_mallocz(256);
90 if (!avctx->stats_out)
91 return AVERROR(ENOMEM);
93 if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
94 if(ff_rate_control_init(&s->m) < 0)
97 s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
99 switch(avctx->pix_fmt){
100 case AV_PIX_FMT_YUV444P:
101 // case AV_PIX_FMT_YUV422P:
102 case AV_PIX_FMT_YUV420P:
103 // case AV_PIX_FMT_YUV411P:
104 case AV_PIX_FMT_YUV410P:
106 s->colorspace_type= 0;
108 case AV_PIX_FMT_GRAY8:
110 s->colorspace_type = 1;
112 /* case AV_PIX_FMT_RGB32:
116 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
119 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
121 ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
122 ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
124 s->input_picture = av_frame_alloc();
125 if (!s->input_picture)
126 return AVERROR(ENOMEM);
127 if ((ret = ff_get_buffer(s->avctx, s->input_picture, AV_GET_BUFFER_FLAG_REF)) < 0)
130 if(s->avctx->me_method == ME_ITER){
132 int size= s->b_width * s->b_height << 2*s->block_max_depth;
133 for(i=0; i<s->max_ref_frames; i++){
134 s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
135 s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
136 if (!s->ref_mvs[i] || !s->ref_scores[i])
137 return AVERROR(ENOMEM);
144 //near copy & paste from dsputil, FIXME
145 static int pix_sum(uint8_t * pix, int line_size, int w, int h)
150 for (i = 0; i < h; i++) {
151 for (j = 0; j < w; j++) {
155 pix += line_size - w;
160 //near copy & paste from dsputil, FIXME
161 static int pix_norm1(uint8_t * pix, int line_size, int w)
164 uint32_t *sq = ff_square_tab + 256;
167 for (i = 0; i < w; i++) {
168 for (j = 0; j < w; j ++) {
172 pix += line_size - w;
177 static inline int get_penalty_factor(int lambda, int lambda2, int type){
181 return lambda>>FF_LAMBDA_SHIFT;
183 return (3*lambda)>>(FF_LAMBDA_SHIFT+1);
185 return (4*lambda)>>(FF_LAMBDA_SHIFT);
187 return (2*lambda)>>(FF_LAMBDA_SHIFT);
190 return (2*lambda)>>FF_LAMBDA_SHIFT;
195 return lambda2>>FF_LAMBDA_SHIFT;
204 #define P_TOPRIGHT P[3]
205 #define P_MEDIAN P[4]
207 #define FLAG_QPEL 1 //must be 1
209 static int encode_q_branch(SnowContext *s, int level, int x, int y){
210 uint8_t p_buffer[1024];
211 uint8_t i_buffer[1024];
212 uint8_t p_state[sizeof(s->block_state)];
213 uint8_t i_state[sizeof(s->block_state)];
215 uint8_t *pbbak= s->c.bytestream;
216 uint8_t *pbbak_start= s->c.bytestream_start;
217 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
218 const int w= s->b_width << s->block_max_depth;
219 const int h= s->b_height << s->block_max_depth;
220 const int rem_depth= s->block_max_depth - level;
221 const int index= (x + y*w) << rem_depth;
222 const int block_w= 1<<(LOG2_MB_SIZE - level);
223 int trx= (x+1)<<rem_depth;
224 int try= (y+1)<<rem_depth;
225 const BlockNode *left = x ? &s->block[index-1] : &null_block;
226 const BlockNode *top = y ? &s->block[index-w] : &null_block;
227 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
228 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
229 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
230 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
231 int pl = left->color[0];
232 int pcb= left->color[1];
233 int pcr= left->color[2];
237 const int stride= s->current_picture->linesize[0];
238 const int uvstride= s->current_picture->linesize[1];
239 uint8_t *current_data[3]= { s->input_picture->data[0] + (x + y* stride)*block_w,
240 s->input_picture->data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
241 s->input_picture->data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
243 int16_t last_mv[3][2];
244 int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
245 const int shift= 1+qpel;
246 MotionEstContext *c= &s->m.me;
247 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
248 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
249 int my_context= av_log2(2*FFABS(left->my - top->my));
250 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
251 int ref, best_ref, ref_score, ref_mx, ref_my;
253 av_assert0(sizeof(s->block_state) >= 256);
255 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
259 // clip predictors / edge ?
265 P_TOPRIGHT[0]= tr->mx;
266 P_TOPRIGHT[1]= tr->my;
268 last_mv[0][0]= s->block[index].mx;
269 last_mv[0][1]= s->block[index].my;
270 last_mv[1][0]= right->mx;
271 last_mv[1][1]= right->my;
272 last_mv[2][0]= bottom->mx;
273 last_mv[2][1]= bottom->my;
280 av_assert1(c-> stride == stride);
281 av_assert1(c->uvstride == uvstride);
283 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
284 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
285 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
286 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
288 c->xmin = - x*block_w - 16+3;
289 c->ymin = - y*block_w - 16+3;
290 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
291 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
293 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
294 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
295 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
296 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
297 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
298 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
299 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
301 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
302 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
305 c->pred_x= P_LEFT[0];
306 c->pred_y= P_LEFT[1];
308 c->pred_x = P_MEDIAN[0];
309 c->pred_y = P_MEDIAN[1];
314 for(ref=0; ref<s->ref_frames; ref++){
315 init_ref(c, current_data, s->last_picture[ref]->data, NULL, block_w*x, block_w*y, 0);
317 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
318 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
320 av_assert2(ref_mx >= c->xmin);
321 av_assert2(ref_mx <= c->xmax);
322 av_assert2(ref_my >= c->ymin);
323 av_assert2(ref_my <= c->ymax);
325 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
326 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
327 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
329 s->ref_mvs[ref][index][0]= ref_mx;
330 s->ref_mvs[ref][index][1]= ref_my;
331 s->ref_scores[ref][index]= ref_score;
333 if(score > ref_score){
340 //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
343 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
346 pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
347 memcpy(p_state, s->block_state, sizeof(s->block_state));
349 if(level!=s->block_max_depth)
350 put_rac(&pc, &p_state[4 + s_context], 1);
351 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
352 if(s->ref_frames > 1)
353 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
354 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
355 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
356 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
357 p_len= pc.bytestream - pc.bytestream_start;
358 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
360 block_s= block_w*block_w;
361 sum = pix_sum(current_data[0], stride, block_w, block_w);
362 l= (sum + block_s/2)/block_s;
363 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
365 if (s->nb_planes > 2) {
366 block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
367 sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
368 cb= (sum + block_s/2)/block_s;
369 // iscore += pix_norm1(¤t_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
370 sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
371 cr= (sum + block_s/2)/block_s;
372 // iscore += pix_norm1(¤t_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
378 ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
379 memcpy(i_state, s->block_state, sizeof(s->block_state));
380 if(level!=s->block_max_depth)
381 put_rac(&ic, &i_state[4 + s_context], 1);
382 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
383 put_symbol(&ic, &i_state[32], l-pl , 1);
384 if (s->nb_planes > 2) {
385 put_symbol(&ic, &i_state[64], cb-pcb, 1);
386 put_symbol(&ic, &i_state[96], cr-pcr, 1);
388 i_len= ic.bytestream - ic.bytestream_start;
389 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
391 // assert(score==256*256*256*64-1);
392 av_assert1(iscore < 255*255*256 + s->lambda2*10);
393 av_assert1(iscore >= 0);
394 av_assert1(l>=0 && l<=255);
395 av_assert1(pl>=0 && pl<=255);
398 int varc= iscore >> 8;
399 int vard= score >> 8;
400 if (vard <= 64 || vard < varc)
401 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
403 c->scene_change_score+= s->m.qscale;
406 if(level!=s->block_max_depth){
407 put_rac(&s->c, &s->block_state[4 + s_context], 0);
408 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
409 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
410 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
411 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
412 score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
414 if(score2 < score && score2 < iscore)
419 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
420 memcpy(pbbak, i_buffer, i_len);
422 s->c.bytestream_start= pbbak_start;
423 s->c.bytestream= pbbak + i_len;
424 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
425 memcpy(s->block_state, i_state, sizeof(s->block_state));
428 memcpy(pbbak, p_buffer, p_len);
430 s->c.bytestream_start= pbbak_start;
431 s->c.bytestream= pbbak + p_len;
432 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
433 memcpy(s->block_state, p_state, sizeof(s->block_state));
438 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
439 const int w= s->b_width << s->block_max_depth;
440 const int rem_depth= s->block_max_depth - level;
441 const int index= (x + y*w) << rem_depth;
442 int trx= (x+1)<<rem_depth;
443 BlockNode *b= &s->block[index];
444 const BlockNode *left = x ? &s->block[index-1] : &null_block;
445 const BlockNode *top = y ? &s->block[index-w] : &null_block;
446 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
447 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
448 int pl = left->color[0];
449 int pcb= left->color[1];
450 int pcr= left->color[2];
452 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
453 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
454 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
455 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
458 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
462 if(level!=s->block_max_depth){
463 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
464 put_rac(&s->c, &s->block_state[4 + s_context], 1);
466 put_rac(&s->c, &s->block_state[4 + s_context], 0);
467 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
468 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
469 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
470 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
474 if(b->type & BLOCK_INTRA){
475 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
476 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
477 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
478 if (s->nb_planes > 2) {
479 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
480 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
482 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
484 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
485 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
486 if(s->ref_frames > 1)
487 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
488 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
489 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
490 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
494 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
496 Plane *p= &s->plane[plane_index];
497 const int block_size = MB_SIZE >> s->block_max_depth;
498 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
499 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
500 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
501 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
502 const int ref_stride= s->current_picture->linesize[plane_index];
503 uint8_t *src= s-> input_picture->data[plane_index];
504 IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
505 const int b_stride = s->b_width << s->block_max_depth;
506 const int w= p->width;
507 const int h= p->height;
508 int index= mb_x + mb_y*b_stride;
509 BlockNode *b= &s->block[index];
510 BlockNode backup= *b;
514 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
516 b->type|= BLOCK_INTRA;
517 b->color[plane_index]= 0;
518 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
521 int mb_x2= mb_x + (i &1) - 1;
522 int mb_y2= mb_y + (i>>1) - 1;
523 int x= block_w*mb_x2 + block_w/2;
524 int y= block_h*mb_y2 + block_h/2;
526 add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
527 x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
529 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
530 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
531 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
532 int obmc_v= obmc[index];
534 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
535 if(x<0) obmc_v += obmc[index + block_w];
536 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
537 if(x+block_w>w) obmc_v += obmc[index - block_w];
538 //FIXME precalculate this or simplify it somehow else
540 d = -dst[index] + (1<<(FRAC_BITS-1));
542 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
543 aa += obmc_v * obmc_v; //FIXME precalculate this
549 return av_clip( ROUNDED_DIV(ab<<LOG2_OBMC_MAX, aa), 0, 255); //FIXME we should not need clipping
552 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
553 const int b_stride = s->b_width << s->block_max_depth;
554 const int b_height = s->b_height<< s->block_max_depth;
555 int index= x + y*b_stride;
556 const BlockNode *b = &s->block[index];
557 const BlockNode *left = x ? &s->block[index-1] : &null_block;
558 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
559 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
560 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
562 // int mx_context= av_log2(2*FFABS(left->mx - top->mx));
563 // int my_context= av_log2(2*FFABS(left->my - top->my));
565 if(x<0 || x>=b_stride || y>=b_height)
574 //FIXME try accurate rate
575 //FIXME intra and inter predictors if surrounding blocks are not the same type
576 if(b->type & BLOCK_INTRA){
577 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
578 + av_log2(2*FFABS(left->color[1] - b->color[1]))
579 + av_log2(2*FFABS(left->color[2] - b->color[2])));
581 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
584 return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
585 + av_log2(2*FFABS(dmy))
586 + av_log2(2*b->ref));
590 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){
591 Plane *p= &s->plane[plane_index];
592 const int block_size = MB_SIZE >> s->block_max_depth;
593 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
594 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
595 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
596 const int ref_stride= s->current_picture->linesize[plane_index];
597 uint8_t *dst= s->current_picture->data[plane_index];
598 uint8_t *src= s-> input_picture->data[plane_index];
599 IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
600 uint8_t *cur = s->scratchbuf;
601 uint8_t *tmp = s->emu_edge_buffer;
602 const int b_stride = s->b_width << s->block_max_depth;
603 const int b_height = s->b_height<< s->block_max_depth;
604 const int w= p->width;
605 const int h= p->height;
608 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
609 int sx= block_w*mb_x - block_w/2;
610 int sy= block_h*mb_y - block_h/2;
611 int x0= FFMAX(0,-sx);
612 int y0= FFMAX(0,-sy);
613 int x1= FFMIN(block_w*2, w-sx);
614 int y1= FFMIN(block_h*2, h-sy);
617 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
619 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);
621 for(y=y0; y<y1; y++){
622 const uint8_t *obmc1= obmc_edged[y];
623 const IDWTELEM *pred1 = pred + y*obmc_stride;
624 uint8_t *cur1 = cur + y*ref_stride;
625 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
626 for(x=x0; x<x1; x++){
627 #if FRAC_BITS >= LOG2_OBMC_MAX
628 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
630 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
632 v = (v + pred1[x]) >> FRAC_BITS;
633 if(v&(~255)) v= ~(v>>31);
638 /* copy the regions where obmc[] = (uint8_t)256 */
639 if(LOG2_OBMC_MAX == 8
640 && (mb_x == 0 || mb_x == b_stride-1)
641 && (mb_y == 0 || mb_y == b_height-1)){
651 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
655 /* FIXME rearrange dsputil to fit 32x32 cmp functions */
656 /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
657 /* FIXME cmps overlap but do not cover the wavelet's whole support.
658 * So improving the score of one block is not strictly guaranteed
659 * to improve the score of the whole frame, thus iterative motion
660 * estimation does not always converge. */
661 if(s->avctx->me_cmp == FF_CMP_W97)
662 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
663 else if(s->avctx->me_cmp == FF_CMP_W53)
664 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
668 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
669 distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
673 av_assert2(block_w==8);
674 distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
683 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
685 if(mb_x == b_stride-2)
686 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
688 return distortion + rate*penalty_factor;
691 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
693 Plane *p= &s->plane[plane_index];
694 const int block_size = MB_SIZE >> s->block_max_depth;
695 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
696 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
697 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
698 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
699 const int ref_stride= s->current_picture->linesize[plane_index];
700 uint8_t *dst= s->current_picture->data[plane_index];
701 uint8_t *src= s-> input_picture->data[plane_index];
702 //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
703 // const has only been removed from zero_dst to suppress a warning
704 static IDWTELEM zero_dst[4096]; //FIXME
705 const int b_stride = s->b_width << s->block_max_depth;
706 const int w= p->width;
707 const int h= p->height;
710 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
712 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
715 int mb_x2= mb_x + (i%3) - 1;
716 int mb_y2= mb_y + (i/3) - 1;
717 int x= block_w*mb_x2 + block_w/2;
718 int y= block_h*mb_y2 + block_h/2;
720 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
721 x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
723 //FIXME find a cleaner/simpler way to skip the outside stuff
724 for(y2= y; y2<0; y2++)
725 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
726 for(y2= h; y2<y+block_h; y2++)
727 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
729 for(y2= y; y2<y+block_h; y2++)
730 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
733 for(y2= y; y2<y+block_h; y2++)
734 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
737 av_assert1(block_w== 8 || block_w==16);
738 distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
742 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
743 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
751 rate = get_block_bits(s, mb_x, mb_y, 2);
752 for(i=merged?4:0; i<9; i++){
753 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
754 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
757 return distortion + rate*penalty_factor;
760 static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
761 const int w= b->width;
762 const int h= b->height;
767 int *runs = s->run_buffer;
774 int /*ll=0, */l=0, lt=0, t=0, rt=0;
775 v= src[x + y*stride];
778 t= src[x + (y-1)*stride];
780 lt= src[x - 1 + (y-1)*stride];
783 rt= src[x + 1 + (y-1)*stride];
787 l= src[x - 1 + y*stride];
789 if(orientation==1) ll= src[y + (x-2)*stride];
790 else ll= src[x - 2 + y*stride];
796 if(px<b->parent->width && py<b->parent->height)
797 p= parent[px + py*2*stride];
799 if(!(/*ll|*/l|lt|t|rt|p)){
801 runs[run_index++]= run;
809 max_index= run_index;
810 runs[run_index++]= run;
812 run= runs[run_index++];
814 put_symbol2(&s->c, b->state[30], max_index, 0);
815 if(run_index <= max_index)
816 put_symbol2(&s->c, b->state[1], run, 3);
819 if(s->c.bytestream_end - s->c.bytestream < w*40){
820 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
825 int /*ll=0, */l=0, lt=0, t=0, rt=0;
826 v= src[x + y*stride];
829 t= src[x + (y-1)*stride];
831 lt= src[x - 1 + (y-1)*stride];
834 rt= src[x + 1 + (y-1)*stride];
838 l= src[x - 1 + y*stride];
840 if(orientation==1) ll= src[y + (x-2)*stride];
841 else ll= src[x - 2 + y*stride];
847 if(px<b->parent->width && py<b->parent->height)
848 p= parent[px + py*2*stride];
850 if(/*ll|*/l|lt|t|rt|p){
851 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
853 put_rac(&s->c, &b->state[0][context], !!v);
856 run= runs[run_index++];
858 if(run_index <= max_index)
859 put_symbol2(&s->c, b->state[1], run, 3);
867 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
868 int l2= 2*FFABS(l) + (l<0);
869 int t2= 2*FFABS(t) + (t<0);
871 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
872 put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
880 static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
881 // encode_subband_qtree(s, b, src, parent, stride, orientation);
882 // encode_subband_z0run(s, b, src, parent, stride, orientation);
883 return encode_subband_c0run(s, b, src, parent, stride, orientation);
884 // encode_subband_dzr(s, b, src, parent, stride, orientation);
887 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){
888 const int b_stride= s->b_width << s->block_max_depth;
889 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
890 BlockNode backup= *block;
894 av_assert2(mb_x>=0 && mb_y>=0);
895 av_assert2(mb_x<b_stride);
898 block->color[0] = p[0];
899 block->color[1] = p[1];
900 block->color[2] = p[2];
901 block->type |= BLOCK_INTRA;
903 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
904 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
905 if(s->me_cache[index] == value)
907 s->me_cache[index]= value;
911 block->type &= ~BLOCK_INTRA;
914 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
926 /* special case for int[2] args we discard afterwards,
927 * fixes compilation problem with gcc 2.95 */
928 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){
930 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
933 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){
934 const int b_stride= s->b_width << s->block_max_depth;
935 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
940 /* We don't initialize backup[] during variable declaration, because
941 * that fails to compile on MSVC: "cannot convert from 'BlockNode' to
943 backup[0] = block[0];
944 backup[1] = block[1];
945 backup[2] = block[b_stride];
946 backup[3] = block[b_stride + 1];
948 av_assert2(mb_x>=0 && mb_y>=0);
949 av_assert2(mb_x<b_stride);
950 av_assert2(((mb_x|mb_y)&1) == 0);
952 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
953 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
954 if(s->me_cache[index] == value)
956 s->me_cache[index]= value;
961 block->type &= ~BLOCK_INTRA;
962 block[1]= block[b_stride]= block[b_stride+1]= *block;
964 rd= get_4block_rd(s, mb_x, mb_y, 0);
973 block[b_stride]= backup[2];
974 block[b_stride+1]= backup[3];
979 static void iterative_me(SnowContext *s){
980 int pass, mb_x, mb_y;
981 const int b_width = s->b_width << s->block_max_depth;
982 const int b_height= s->b_height << s->block_max_depth;
983 const int b_stride= b_width;
988 uint8_t state[sizeof(s->block_state)];
989 memcpy(state, s->block_state, sizeof(s->block_state));
990 for(mb_y= 0; mb_y<s->b_height; mb_y++)
991 for(mb_x= 0; mb_x<s->b_width; mb_x++)
992 encode_q_branch(s, 0, mb_x, mb_y);
994 memcpy(s->block_state, state, sizeof(s->block_state));
997 for(pass=0; pass<25; pass++){
1000 for(mb_y= 0; mb_y<b_height; mb_y++){
1001 for(mb_x= 0; mb_x<b_width; mb_x++){
1002 int dia_change, i, j, ref;
1003 int best_rd= INT_MAX, ref_rd;
1004 BlockNode backup, ref_b;
1005 const int index= mb_x + mb_y * b_stride;
1006 BlockNode *block= &s->block[index];
1007 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
1008 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
1009 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
1010 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
1011 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
1012 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
1013 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1014 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1015 const int b_w= (MB_SIZE >> s->block_max_depth);
1016 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
1018 if(pass && (block->type & BLOCK_OPT))
1020 block->type |= BLOCK_OPT;
1024 if(!s->me_cache_generation)
1025 memset(s->me_cache, 0, sizeof(s->me_cache));
1026 s->me_cache_generation += 1<<22;
1028 //FIXME precalculate
1031 for (y = 0; y < b_w * 2; y++)
1032 memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
1034 for(y=0; y<b_w*2; y++)
1035 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1036 if(mb_x==b_stride-1)
1037 for(y=0; y<b_w*2; y++)
1038 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1040 for(x=0; x<b_w*2; x++)
1041 obmc_edged[0][x] += obmc_edged[b_w-1][x];
1042 for(y=1; y<b_w; y++)
1043 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1045 if(mb_y==b_height-1){
1046 for(x=0; x<b_w*2; x++)
1047 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1048 for(y=b_w; y<b_w*2-1; y++)
1049 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1053 //skip stuff outside the picture
1054 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1055 uint8_t *src= s-> input_picture->data[0];
1056 uint8_t *dst= s->current_picture->data[0];
1057 const int stride= s->current_picture->linesize[0];
1058 const int block_w= MB_SIZE >> s->block_max_depth;
1059 const int block_h= MB_SIZE >> s->block_max_depth;
1060 const int sx= block_w*mb_x - block_w/2;
1061 const int sy= block_h*mb_y - block_h/2;
1062 const int w= s->plane[0].width;
1063 const int h= s->plane[0].height;
1067 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1068 for(y=h; y<sy+block_h*2; y++)
1069 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1071 for(y=sy; y<sy+block_h*2; y++)
1072 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1074 if(sx+block_w*2 > w){
1075 for(y=sy; y<sy+block_h*2; y++)
1076 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1080 // intra(black) = neighbors' contribution to the current block
1081 for(i=0; i < s->nb_planes; i++)
1082 color[i]= get_dc(s, mb_x, mb_y, i);
1084 // get previous score (cannot be cached due to OBMC)
1085 if(pass > 0 && (block->type&BLOCK_INTRA)){
1086 int color0[3]= {block->color[0], block->color[1], block->color[2]};
1087 check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);
1089 check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
1093 for(ref=0; ref < s->ref_frames; ref++){
1094 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1095 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1100 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
1101 check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
1103 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
1105 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][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[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
1112 //FIXME avoid subpel interpolation / round to nearest integer
1115 for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
1117 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1118 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
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);
1126 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1129 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
1131 //FIXME or try the standard 2 pass qpel or similar
1133 mvr[0][0]= block->mx;
1134 mvr[0][1]= block->my;
1135 if(ref_rd > best_rd){
1142 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);
1143 //FIXME RD style color selection
1144 if(!same_block(block, &backup)){
1145 if(tb ) tb ->type &= ~BLOCK_OPT;
1146 if(lb ) lb ->type &= ~BLOCK_OPT;
1147 if(rb ) rb ->type &= ~BLOCK_OPT;
1148 if(bb ) bb ->type &= ~BLOCK_OPT;
1149 if(tlb) tlb->type &= ~BLOCK_OPT;
1150 if(trb) trb->type &= ~BLOCK_OPT;
1151 if(blb) blb->type &= ~BLOCK_OPT;
1152 if(brb) brb->type &= ~BLOCK_OPT;
1157 av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
1162 if(s->block_max_depth == 1){
1164 for(mb_y= 0; mb_y<b_height; mb_y+=2){
1165 for(mb_x= 0; mb_x<b_width; mb_x+=2){
1167 int best_rd, init_rd;
1168 const int index= mb_x + mb_y * b_stride;
1171 b[0]= &s->block[index];
1173 b[2]= b[0]+b_stride;
1175 if(same_block(b[0], b[1]) &&
1176 same_block(b[0], b[2]) &&
1177 same_block(b[0], b[3]))
1180 if(!s->me_cache_generation)
1181 memset(s->me_cache, 0, sizeof(s->me_cache));
1182 s->me_cache_generation += 1<<22;
1184 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1186 //FIXME more multiref search?
1187 check_4block_inter(s, mb_x, mb_y,
1188 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1189 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1192 if(!(b[i]->type&BLOCK_INTRA))
1193 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1195 if(init_rd != best_rd)
1199 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1203 static void encode_blocks(SnowContext *s, int search){
1208 if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
1212 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1213 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1217 if(s->avctx->me_method == ME_ITER || !search)
1218 encode_q_branch2(s, 0, x, y);
1220 encode_q_branch (s, 0, x, y);
1225 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1226 const int w= b->width;
1227 const int h= b->height;
1228 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1229 const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1230 int x,y, thres1, thres2;
1232 if(s->qlog == LOSSLESS_QLOG){
1235 dst[x + y*stride]= src[x + y*stride];
1239 bias= bias ? 0 : (3*qmul)>>3;
1240 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1246 int i= src[x + y*stride];
1248 if((unsigned)(i+thres1) > thres2){
1251 i/= qmul; //FIXME optimize
1252 dst[x + y*stride]= i;
1256 i/= qmul; //FIXME optimize
1257 dst[x + y*stride]= -i;
1260 dst[x + y*stride]= 0;
1266 int i= src[x + y*stride];
1268 if((unsigned)(i+thres1) > thres2){
1271 i= (i + bias) / qmul; //FIXME optimize
1272 dst[x + y*stride]= i;
1276 i= (i + bias) / qmul; //FIXME optimize
1277 dst[x + y*stride]= -i;
1280 dst[x + y*stride]= 0;
1286 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1287 const int w= b->width;
1288 const int h= b->height;
1289 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1290 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1291 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1294 if(s->qlog == LOSSLESS_QLOG) return;
1298 int i= src[x + y*stride];
1300 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1302 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1308 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1309 const int w= b->width;
1310 const int h= b->height;
1313 for(y=h-1; y>=0; y--){
1314 for(x=w-1; x>=0; x--){
1315 int i= x + y*stride;
1319 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1320 else src[i] -= src[i - 1];
1322 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1323 else src[i] -= src[i - 1];
1326 if(y) src[i] -= src[i - stride];
1332 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1333 const int w= b->width;
1334 const int h= b->height;
1339 int i= x + y*stride;
1343 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1344 else src[i] += src[i - 1];
1346 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1347 else src[i] += src[i - 1];
1350 if(y) src[i] += src[i - stride];
1356 static void encode_qlogs(SnowContext *s){
1357 int plane_index, level, orientation;
1359 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1360 for(level=0; level<s->spatial_decomposition_count; level++){
1361 for(orientation=level ? 1:0; orientation<4; orientation++){
1362 if(orientation==2) continue;
1363 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1369 static void encode_header(SnowContext *s){
1373 memset(kstate, MID_STATE, sizeof(kstate));
1375 put_rac(&s->c, kstate, s->keyframe);
1376 if(s->keyframe || s->always_reset){
1377 ff_snow_reset_contexts(s);
1378 s->last_spatial_decomposition_type=
1382 s->last_block_max_depth= 0;
1383 for(plane_index=0; plane_index<2; plane_index++){
1384 Plane *p= &s->plane[plane_index];
1387 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1391 put_symbol(&s->c, s->header_state, s->version, 0);
1392 put_rac(&s->c, s->header_state, s->always_reset);
1393 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1394 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1395 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1396 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1397 if (s->nb_planes > 2) {
1398 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1399 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1401 put_rac(&s->c, s->header_state, s->spatial_scalability);
1402 // put_rac(&s->c, s->header_state, s->rate_scalability);
1403 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1410 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1411 Plane *p= &s->plane[plane_index];
1412 update_mc |= p->last_htaps != p->htaps;
1413 update_mc |= p->last_diag_mc != p->diag_mc;
1414 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1416 put_rac(&s->c, s->header_state, update_mc);
1418 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1419 Plane *p= &s->plane[plane_index];
1420 put_rac(&s->c, s->header_state, p->diag_mc);
1421 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1422 for(i= p->htaps/2; i; i--)
1423 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1426 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1427 put_rac(&s->c, s->header_state, 1);
1428 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1431 put_rac(&s->c, s->header_state, 0);
1434 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1435 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
1436 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
1437 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
1438 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1442 static void update_last_header_values(SnowContext *s){
1446 for(plane_index=0; plane_index<2; plane_index++){
1447 Plane *p= &s->plane[plane_index];
1448 p->last_diag_mc= p->diag_mc;
1449 p->last_htaps = p->htaps;
1450 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1454 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
1455 s->last_qlog = s->qlog;
1456 s->last_qbias = s->qbias;
1457 s->last_mv_scale = s->mv_scale;
1458 s->last_block_max_depth = s->block_max_depth;
1459 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1462 static int qscale2qlog(int qscale){
1463 return rint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))
1464 + 61*QROOT/8; ///< 64 > 60
1467 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1469 /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1470 * FIXME we know exact mv bits at this point,
1471 * but ratecontrol isn't set up to include them. */
1472 uint32_t coef_sum= 0;
1473 int level, orientation, delta_qlog;
1475 for(level=0; level<s->spatial_decomposition_count; level++){
1476 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1477 SubBand *b= &s->plane[0].band[level][orientation];
1478 IDWTELEM *buf= b->ibuf;
1479 const int w= b->width;
1480 const int h= b->height;
1481 const int stride= b->stride;
1482 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1483 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1484 const int qdiv= (1<<16)/qmul;
1486 //FIXME this is ugly
1489 buf[x+y*stride]= b->buf[x+y*stride];
1491 decorrelate(s, b, buf, stride, 1, 0);
1494 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1498 /* ugly, ratecontrol just takes a sqrt again */
1499 av_assert0(coef_sum < INT_MAX);
1500 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1502 if(pict->pict_type == AV_PICTURE_TYPE_I){
1503 s->m.current_picture.mb_var_sum= coef_sum;
1504 s->m.current_picture.mc_mb_var_sum= 0;
1506 s->m.current_picture.mc_mb_var_sum= coef_sum;
1507 s->m.current_picture.mb_var_sum= 0;
1510 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1511 if (pict->quality < 0)
1513 s->lambda= pict->quality * 3/2;
1514 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1515 s->qlog+= delta_qlog;
1519 static void calculate_visual_weight(SnowContext *s, Plane *p){
1520 int width = p->width;
1521 int height= p->height;
1522 int level, orientation, x, y;
1524 for(level=0; level<s->spatial_decomposition_count; level++){
1525 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1526 SubBand *b= &p->band[level][orientation];
1527 IDWTELEM *ibuf= b->ibuf;
1530 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1531 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1532 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1533 for(y=0; y<height; y++){
1534 for(x=0; x<width; x++){
1535 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1540 b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
1545 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1546 AVFrame *pict, int *got_packet)
1548 SnowContext *s = avctx->priv_data;
1549 RangeCoder * const c= &s->c;
1550 AVFrame *pic = pict;
1551 const int width= s->avctx->width;
1552 const int height= s->avctx->height;
1553 int level, orientation, plane_index, i, y, ret;
1554 uint8_t rc_header_bak[sizeof(s->header_state)];
1555 uint8_t rc_block_bak[sizeof(s->block_state)];
1557 if ((ret = ff_alloc_packet2(avctx, pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + FF_MIN_BUFFER_SIZE)) < 0)
1560 ff_init_range_encoder(c, pkt->data, pkt->size);
1561 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1563 for(i=0; i < s->nb_planes; i++){
1564 int hshift= i ? s->chroma_h_shift : 0;
1565 int vshift= i ? s->chroma_v_shift : 0;
1566 for(y=0; y<(height>>vshift); y++)
1567 memcpy(&s->input_picture->data[i][y * s->input_picture->linesize[i]],
1568 &pict->data[i][y * pict->linesize[i]],
1570 s->dsp.draw_edges(s->input_picture->data[i], s->input_picture->linesize[i],
1571 width >> hshift, height >> vshift,
1572 EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
1573 EDGE_TOP | EDGE_BOTTOM);
1577 s->new_picture = pict;
1579 s->m.picture_number= avctx->frame_number;
1580 if(avctx->flags&CODEC_FLAG_PASS2){
1581 s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1582 s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
1583 if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
1584 pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1585 if (pic->quality < 0)
1589 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1590 s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1593 if(s->pass1_rc && avctx->frame_number == 0)
1594 pic->quality = 2*FF_QP2LAMBDA;
1596 s->qlog = qscale2qlog(pic->quality);
1597 s->lambda = pic->quality * 3/2;
1599 if (s->qlog < 0 || (!pic->quality && (avctx->flags & CODEC_FLAG_QSCALE))) {
1600 s->qlog= LOSSLESS_QLOG;
1602 }//else keep previous frame's qlog until after motion estimation
1604 ff_snow_frame_start(s);
1605 avctx->coded_frame= s->current_picture;
1607 s->m.current_picture_ptr= &s->m.current_picture;
1608 s->m.current_picture.f = s->current_picture;
1609 s->m.current_picture.f->pts = pict->pts;
1610 if(pic->pict_type == AV_PICTURE_TYPE_P){
1611 int block_width = (width +15)>>4;
1612 int block_height= (height+15)>>4;
1613 int stride= s->current_picture->linesize[0];
1615 av_assert0(s->current_picture->data[0]);
1616 av_assert0(s->last_picture[0]->data[0]);
1618 s->m.avctx= s->avctx;
1619 s->m. last_picture.f = s->last_picture[0];
1620 s->m. new_picture.f = s->input_picture;
1621 s->m. last_picture_ptr= &s->m. last_picture;
1622 s->m.linesize = stride;
1623 s->m.uvlinesize= s->current_picture->linesize[1];
1625 s->m.height= height;
1626 s->m.mb_width = block_width;
1627 s->m.mb_height= block_height;
1628 s->m.mb_stride= s->m.mb_width+1;
1629 s->m.b8_stride= 2*s->m.mb_width+1;
1631 s->m.pict_type = pic->pict_type;
1632 s->m.me_method= s->avctx->me_method;
1633 s->m.me.scene_change_score=0;
1634 s->m.flags= s->avctx->flags;
1635 s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
1636 s->m.out_format= FMT_H263;
1637 s->m.unrestricted_mv= 1;
1639 s->m.lambda = s->lambda;
1640 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1641 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1643 s->m.dsp= s->dsp; //move
1644 s->m.hdsp = s->hdsp;
1646 s->hdsp = s->m.hdsp;
1651 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1652 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1657 s->spatial_decomposition_count= 5;
1659 while( !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
1660 || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
1661 s->spatial_decomposition_count--;
1663 if (s->spatial_decomposition_count <= 0) {
1664 av_log(avctx, AV_LOG_ERROR, "Resolution too low\n");
1665 return AVERROR(EINVAL);
1668 s->m.pict_type = pic->pict_type;
1669 s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
1671 ff_snow_common_init_after_header(avctx);
1673 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1674 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1675 calculate_visual_weight(s, &s->plane[plane_index]);
1680 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1681 encode_blocks(s, 1);
1682 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1684 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1685 Plane *p= &s->plane[plane_index];
1689 // int bits= put_bits_count(&s->c.pb);
1691 if (!s->memc_only) {
1693 if(pict->data[plane_index]) //FIXME gray hack
1696 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1699 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1702 && pic->pict_type == AV_PICTURE_TYPE_P
1703 && !(avctx->flags&CODEC_FLAG_PASS2)
1704 && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
1705 ff_init_range_encoder(c, pkt->data, pkt->size);
1706 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1707 pic->pict_type= AV_PICTURE_TYPE_I;
1709 s->current_picture->key_frame=1;
1713 if(s->qlog == LOSSLESS_QLOG){
1716 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1722 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1727 ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1729 if(s->pass1_rc && plane_index==0){
1730 int delta_qlog = ratecontrol_1pass(s, pic);
1731 if (delta_qlog <= INT_MIN)
1734 //reordering qlog in the bitstream would eliminate this reset
1735 ff_init_range_encoder(c, pkt->data, pkt->size);
1736 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
1737 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
1739 encode_blocks(s, 0);
1743 for(level=0; level<s->spatial_decomposition_count; level++){
1744 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1745 SubBand *b= &p->band[level][orientation];
1747 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1749 decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
1750 if (!s->no_bitstream)
1751 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1752 av_assert0(b->parent==NULL || b->parent->stride == b->stride*2);
1754 correlate(s, b, b->ibuf, b->stride, 1, 0);
1758 for(level=0; level<s->spatial_decomposition_count; level++){
1759 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1760 SubBand *b= &p->band[level][orientation];
1762 dequantize(s, b, b->ibuf, b->stride);
1766 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1767 if(s->qlog == LOSSLESS_QLOG){
1770 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1774 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1777 if(pic->pict_type == AV_PICTURE_TYPE_I){
1780 s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x]=
1781 pict->data[plane_index][y*pict->linesize[plane_index] + x];
1785 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1786 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1789 if(s->avctx->flags&CODEC_FLAG_PSNR){
1792 if(pict->data[plane_index]) //FIXME gray hack
1795 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];
1799 s->avctx->error[plane_index] += error;
1800 s->current_picture->error[plane_index] = error;
1805 update_last_header_values(s);
1807 ff_snow_release_buffer(avctx);
1809 s->current_picture->coded_picture_number = avctx->frame_number;
1810 s->current_picture->pict_type = pict->pict_type;
1811 s->current_picture->quality = pict->quality;
1812 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1813 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1814 s->m.current_picture.f->display_picture_number =
1815 s->m.current_picture.f->coded_picture_number = avctx->frame_number;
1816 s->m.current_picture.f->quality = pic->quality;
1817 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1819 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1821 if(avctx->flags&CODEC_FLAG_PASS1)
1822 ff_write_pass1_stats(&s->m);
1823 s->m.last_pict_type = s->m.pict_type;
1824 avctx->frame_bits = s->m.frame_bits;
1825 avctx->mv_bits = s->m.mv_bits;
1826 avctx->misc_bits = s->m.misc_bits;
1827 avctx->p_tex_bits = s->m.p_tex_bits;
1831 pkt->size = ff_rac_terminate(c);
1832 if (avctx->coded_frame->key_frame)
1833 pkt->flags |= AV_PKT_FLAG_KEY;
1839 static av_cold int encode_end(AVCodecContext *avctx)
1841 SnowContext *s = avctx->priv_data;
1843 ff_snow_common_end(s);
1844 ff_rate_control_uninit(&s->m);
1845 av_frame_free(&s->input_picture);
1846 av_free(avctx->stats_out);
1851 #define OFFSET(x) offsetof(SnowContext, x)
1852 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1853 static const AVOption options[] = {
1854 { "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 },
1855 { "no_bitstream", "Skip final bitstream writeout.", OFFSET(no_bitstream), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1859 static const AVClass snowenc_class = {
1860 .class_name = "snow encoder",
1861 .item_name = av_default_item_name,
1863 .version = LIBAVUTIL_VERSION_INT,
1866 AVCodec ff_snow_encoder = {
1868 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
1869 .type = AVMEDIA_TYPE_VIDEO,
1870 .id = AV_CODEC_ID_SNOW,
1871 .priv_data_size = sizeof(SnowContext),
1872 .init = encode_init,
1873 .encode2 = encode_frame,
1874 .close = encode_end,
1875 .pix_fmts = (const enum AVPixelFormat[]){
1876 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,
1880 .priv_class = &snowenc_class,
1889 #include "libavutil/lfg.h"
1890 #include "libavutil/mathematics.h"
1895 int buffer[2][width*height];
1899 s.spatial_decomposition_count=6;
1900 s.spatial_decomposition_type=1;
1902 s.temp_dwt_buffer = av_mallocz(width * sizeof(DWTELEM));
1903 s.temp_idwt_buffer = av_mallocz(width * sizeof(IDWTELEM));
1905 av_lfg_init(&prng, 1);
1907 printf("testing 5/3 DWT\n");
1908 for(i=0; i<width*height; i++)
1909 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1911 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1912 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1914 for(i=0; i<width*height; i++)
1915 if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1917 printf("testing 9/7 DWT\n");
1918 s.spatial_decomposition_type=0;
1919 for(i=0; i<width*height; i++)
1920 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1922 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1923 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1925 for(i=0; i<width*height; i++)
1926 if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1929 int level, orientation, x, y;
1930 int64_t errors[8][4];
1933 memset(errors, 0, sizeof(errors));
1934 s.spatial_decomposition_count=3;
1935 s.spatial_decomposition_type=0;
1936 for(level=0; level<s.spatial_decomposition_count; level++){
1937 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1938 int w= width >> (s.spatial_decomposition_count-level);
1939 int h= height >> (s.spatial_decomposition_count-level);
1940 int stride= width << (s.spatial_decomposition_count-level);
1941 DWTELEM *buf= buffer[0];
1944 if(orientation&1) buf+=w;
1945 if(orientation>1) buf+=stride>>1;
1947 memset(buffer[0], 0, sizeof(int)*width*height);
1948 buf[w/2 + h/2*stride]= 256*256;
1949 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1950 for(y=0; y<height; y++){
1951 for(x=0; x<width; x++){
1952 int64_t d= buffer[0][x + y*width];
1954 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);
1956 if(FFABS(height/2-y)<9 && level==2) printf("\n");
1958 error= (int)(sqrt(error)+0.5);
1959 errors[level][orientation]= error;
1960 if(g) g=av_gcd(g, error);
1964 printf("static int const visual_weight[][4]={\n");
1965 for(level=0; level<s.spatial_decomposition_count; level++){
1967 for(orientation=0; orientation<4; orientation++){
1968 printf("%8"PRId64",", errors[level][orientation]/g);
1975 int w= width >> (s.spatial_decomposition_count-level);
1976 //int h= height >> (s.spatial_decomposition_count-level);
1977 int stride= width << (s.spatial_decomposition_count-level);
1978 DWTELEM *buf= buffer[0];
1984 memset(buffer[0], 0, sizeof(int)*width*height);
1985 for(y=0; y<height; y++){
1986 for(x=0; x<width; x++){
1987 int tab[4]={0,2,3,1};
1988 buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];
1991 ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1992 for(y=0; y<height; y++){
1993 for(x=0; x<width; x++){
1994 int64_t d= buffer[0][x + y*width];
1996 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);
1998 if(FFABS(height/2-y)<9) printf("\n");