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path: root/libavcodec/snowenc.c (plain)
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1/*
2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21#include "libavutil/intmath.h"
22#include "libavutil/libm.h"
23#include "libavutil/log.h"
24#include "libavutil/opt.h"
25#include "avcodec.h"
26#include "internal.h"
27#include "snow_dwt.h"
28#include "snow.h"
29
30#include "rangecoder.h"
31#include "mathops.h"
32
33#include "mpegvideo.h"
34#include "h263.h"
35
36#define FF_ME_ITER 50
37
38static av_cold int encode_init(AVCodecContext *avctx)
39{
40 SnowContext *s = avctx->priv_data;
41 int plane_index, ret;
42 int i;
43
44#if FF_API_PRIVATE_OPT
45FF_DISABLE_DEPRECATION_WARNINGS
46 if (avctx->prediction_method)
47 s->pred = avctx->prediction_method;
48FF_ENABLE_DEPRECATION_WARNINGS
49#endif
50
51 if(s->pred == DWT_97
52 && (avctx->flags & AV_CODEC_FLAG_QSCALE)
53 && avctx->global_quality == 0){
54 av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
55 return -1;
56 }
57#if FF_API_MOTION_EST
58FF_DISABLE_DEPRECATION_WARNINGS
59 if (avctx->me_method == ME_ITER)
60 s->motion_est = FF_ME_ITER;
61FF_ENABLE_DEPRECATION_WARNINGS
62#endif
63
64 s->spatial_decomposition_type= s->pred; //FIXME add decorrelator type r transform_type
65
66 s->mv_scale = (avctx->flags & AV_CODEC_FLAG_QPEL) ? 2 : 4;
67 s->block_max_depth= (avctx->flags & AV_CODEC_FLAG_4MV ) ? 1 : 0;
68
69 for(plane_index=0; plane_index<3; plane_index++){
70 s->plane[plane_index].diag_mc= 1;
71 s->plane[plane_index].htaps= 6;
72 s->plane[plane_index].hcoeff[0]= 40;
73 s->plane[plane_index].hcoeff[1]= -10;
74 s->plane[plane_index].hcoeff[2]= 2;
75 s->plane[plane_index].fast_mc= 1;
76 }
77
78 if ((ret = ff_snow_common_init(avctx)) < 0) {
79 return ret;
80 }
81 ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
82
83 ff_snow_alloc_blocks(s);
84
85 s->version=0;
86
87 s->m.avctx = avctx;
88 s->m.bit_rate= avctx->bit_rate;
89
90 s->m.me.temp =
91 s->m.me.scratchpad= av_mallocz_array((avctx->width+64), 2*16*2*sizeof(uint8_t));
92 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
93 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
94 s->m.sc.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
95 if (!s->m.me.scratchpad || !s->m.me.map || !s->m.me.score_map || !s->m.sc.obmc_scratchpad)
96 return AVERROR(ENOMEM);
97
98 ff_h263_encode_init(&s->m); //mv_penalty
99
100 s->max_ref_frames = av_clip(avctx->refs, 1, MAX_REF_FRAMES);
101
102 if(avctx->flags&AV_CODEC_FLAG_PASS1){
103 if(!avctx->stats_out)
104 avctx->stats_out = av_mallocz(256);
105
106 if (!avctx->stats_out)
107 return AVERROR(ENOMEM);
108 }
109 if((avctx->flags&AV_CODEC_FLAG_PASS2) || !(avctx->flags&AV_CODEC_FLAG_QSCALE)){
110 if(ff_rate_control_init(&s->m) < 0)
111 return -1;
112 }
113 s->pass1_rc= !(avctx->flags & (AV_CODEC_FLAG_QSCALE|AV_CODEC_FLAG_PASS2));
114
115 switch(avctx->pix_fmt){
116 case AV_PIX_FMT_YUV444P:
117// case AV_PIX_FMT_YUV422P:
118 case AV_PIX_FMT_YUV420P:
119// case AV_PIX_FMT_YUV411P:
120 case AV_PIX_FMT_YUV410P:
121 s->nb_planes = 3;
122 s->colorspace_type= 0;
123 break;
124 case AV_PIX_FMT_GRAY8:
125 s->nb_planes = 1;
126 s->colorspace_type = 1;
127 break;
128/* case AV_PIX_FMT_RGB32:
129 s->colorspace= 1;
130 break;*/
131 default:
132 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
133 return -1;
134 }
135 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
136
137 ff_set_cmp(&s->mecc, s->mecc.me_cmp, s->avctx->me_cmp);
138 ff_set_cmp(&s->mecc, s->mecc.me_sub_cmp, s->avctx->me_sub_cmp);
139
140 s->input_picture = av_frame_alloc();
141 if (!s->input_picture)
142 return AVERROR(ENOMEM);
143
144 if ((ret = ff_snow_get_buffer(s, s->input_picture)) < 0)
145 return ret;
146
147 if(s->motion_est == FF_ME_ITER){
148 int size= s->b_width * s->b_height << 2*s->block_max_depth;
149 for(i=0; i<s->max_ref_frames; i++){
150 s->ref_mvs[i]= av_mallocz_array(size, sizeof(int16_t[2]));
151 s->ref_scores[i]= av_mallocz_array(size, sizeof(uint32_t));
152 if (!s->ref_mvs[i] || !s->ref_scores[i])
153 return AVERROR(ENOMEM);
154 }
155 }
156
157 return 0;
158}
159
160//near copy & paste from dsputil, FIXME
161static int pix_sum(uint8_t * pix, int line_size, int w, int h)
162{
163 int s, i, j;
164
165 s = 0;
166 for (i = 0; i < h; i++) {
167 for (j = 0; j < w; j++) {
168 s += pix[0];
169 pix ++;
170 }
171 pix += line_size - w;
172 }
173 return s;
174}
175
176//near copy & paste from dsputil, FIXME
177static int pix_norm1(uint8_t * pix, int line_size, int w)
178{
179 int s, i, j;
180 uint32_t *sq = ff_square_tab + 256;
181
182 s = 0;
183 for (i = 0; i < w; i++) {
184 for (j = 0; j < w; j ++) {
185 s += sq[pix[0]];
186 pix ++;
187 }
188 pix += line_size - w;
189 }
190 return s;
191}
192
193static inline int get_penalty_factor(int lambda, int lambda2, int type){
194 switch(type&0xFF){
195 default:
196 case FF_CMP_SAD:
197 return lambda>>FF_LAMBDA_SHIFT;
198 case FF_CMP_DCT:
199 return (3*lambda)>>(FF_LAMBDA_SHIFT+1);
200 case FF_CMP_W53:
201 return (4*lambda)>>(FF_LAMBDA_SHIFT);
202 case FF_CMP_W97:
203 return (2*lambda)>>(FF_LAMBDA_SHIFT);
204 case FF_CMP_SATD:
205 case FF_CMP_DCT264:
206 return (2*lambda)>>FF_LAMBDA_SHIFT;
207 case FF_CMP_RD:
208 case FF_CMP_PSNR:
209 case FF_CMP_SSE:
210 case FF_CMP_NSSE:
211 return lambda2>>FF_LAMBDA_SHIFT;
212 case FF_CMP_BIT:
213 return 1;
214 }
215}
216
217//FIXME copy&paste
218#define P_LEFT P[1]
219#define P_TOP P[2]
220#define P_TOPRIGHT P[3]
221#define P_MEDIAN P[4]
222#define P_MV1 P[9]
223#define FLAG_QPEL 1 //must be 1
224
225static int encode_q_branch(SnowContext *s, int level, int x, int y){
226 uint8_t p_buffer[1024];
227 uint8_t i_buffer[1024];
228 uint8_t p_state[sizeof(s->block_state)];
229 uint8_t i_state[sizeof(s->block_state)];
230 RangeCoder pc, ic;
231 uint8_t *pbbak= s->c.bytestream;
232 uint8_t *pbbak_start= s->c.bytestream_start;
233 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
234 const int w= s->b_width << s->block_max_depth;
235 const int h= s->b_height << s->block_max_depth;
236 const int rem_depth= s->block_max_depth - level;
237 const int index= (x + y*w) << rem_depth;
238 const int block_w= 1<<(LOG2_MB_SIZE - level);
239 int trx= (x+1)<<rem_depth;
240 int try= (y+1)<<rem_depth;
241 const BlockNode *left = x ? &s->block[index-1] : &null_block;
242 const BlockNode *top = y ? &s->block[index-w] : &null_block;
243 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
244 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
245 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
246 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
247 int pl = left->color[0];
248 int pcb= left->color[1];
249 int pcr= left->color[2];
250 int pmx, pmy;
251 int mx=0, my=0;
252 int l,cr,cb;
253 const int stride= s->current_picture->linesize[0];
254 const int uvstride= s->current_picture->linesize[1];
255 uint8_t *current_data[3]= { s->input_picture->data[0] + (x + y* stride)*block_w,
256 s->input_picture->data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
257 s->input_picture->data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
258 int P[10][2];
259 int16_t last_mv[3][2];
260 int qpel= !!(s->avctx->flags & AV_CODEC_FLAG_QPEL); //unused
261 const int shift= 1+qpel;
262 MotionEstContext *c= &s->m.me;
263 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
264 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
265 int my_context= av_log2(2*FFABS(left->my - top->my));
266 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
267 int ref, best_ref, ref_score, ref_mx, ref_my;
268
269 av_assert0(sizeof(s->block_state) >= 256);
270 if(s->keyframe){
271 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
272 return 0;
273 }
274
275// clip predictors / edge ?
276
277 P_LEFT[0]= left->mx;
278 P_LEFT[1]= left->my;
279 P_TOP [0]= top->mx;
280 P_TOP [1]= top->my;
281 P_TOPRIGHT[0]= tr->mx;
282 P_TOPRIGHT[1]= tr->my;
283
284 last_mv[0][0]= s->block[index].mx;
285 last_mv[0][1]= s->block[index].my;
286 last_mv[1][0]= right->mx;
287 last_mv[1][1]= right->my;
288 last_mv[2][0]= bottom->mx;
289 last_mv[2][1]= bottom->my;
290
291 s->m.mb_stride=2;
292 s->m.mb_x=
293 s->m.mb_y= 0;
294 c->skip= 0;
295
296 av_assert1(c-> stride == stride);
297 av_assert1(c->uvstride == uvstride);
298
299 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
300 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
301 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
302 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_DMV;
303
304 c->xmin = - x*block_w - 16+3;
305 c->ymin = - y*block_w - 16+3;
306 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
307 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
308
309 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
310 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
311 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
312 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
313 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
314 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
315 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
316
317 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
318 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
319
320 if (!y) {
321 c->pred_x= P_LEFT[0];
322 c->pred_y= P_LEFT[1];
323 } else {
324 c->pred_x = P_MEDIAN[0];
325 c->pred_y = P_MEDIAN[1];
326 }
327
328 score= INT_MAX;
329 best_ref= 0;
330 for(ref=0; ref<s->ref_frames; ref++){
331 init_ref(c, current_data, s->last_picture[ref]->data, NULL, block_w*x, block_w*y, 0);
332
333 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
334 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
335
336 av_assert2(ref_mx >= c->xmin);
337 av_assert2(ref_mx <= c->xmax);
338 av_assert2(ref_my >= c->ymin);
339 av_assert2(ref_my <= c->ymax);
340
341 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
342 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
343 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
344 if(s->ref_mvs[ref]){
345 s->ref_mvs[ref][index][0]= ref_mx;
346 s->ref_mvs[ref][index][1]= ref_my;
347 s->ref_scores[ref][index]= ref_score;
348 }
349 if(score > ref_score){
350 score= ref_score;
351 best_ref= ref;
352 mx= ref_mx;
353 my= ref_my;
354 }
355 }
356 //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
357
358 // subpel search
359 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
360 pc= s->c;
361 pc.bytestream_start=
362 pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
363 memcpy(p_state, s->block_state, sizeof(s->block_state));
364
365 if(level!=s->block_max_depth)
366 put_rac(&pc, &p_state[4 + s_context], 1);
367 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
368 if(s->ref_frames > 1)
369 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
370 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
371 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
372 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
373 p_len= pc.bytestream - pc.bytestream_start;
374 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
375
376 block_s= block_w*block_w;
377 sum = pix_sum(current_data[0], stride, block_w, block_w);
378 l= (sum + block_s/2)/block_s;
379 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
380
381 if (s->nb_planes > 2) {
382 block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
383 sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
384 cb= (sum + block_s/2)/block_s;
385 // iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
386 sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
387 cr= (sum + block_s/2)/block_s;
388 // iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
389 }else
390 cb = cr = 0;
391
392 ic= s->c;
393 ic.bytestream_start=
394 ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
395 memcpy(i_state, s->block_state, sizeof(s->block_state));
396 if(level!=s->block_max_depth)
397 put_rac(&ic, &i_state[4 + s_context], 1);
398 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
399 put_symbol(&ic, &i_state[32], l-pl , 1);
400 if (s->nb_planes > 2) {
401 put_symbol(&ic, &i_state[64], cb-pcb, 1);
402 put_symbol(&ic, &i_state[96], cr-pcr, 1);
403 }
404 i_len= ic.bytestream - ic.bytestream_start;
405 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
406
407 av_assert1(iscore < 255*255*256 + s->lambda2*10);
408 av_assert1(iscore >= 0);
409 av_assert1(l>=0 && l<=255);
410 av_assert1(pl>=0 && pl<=255);
411
412 if(level==0){
413 int varc= iscore >> 8;
414 int vard= score >> 8;
415 if (vard <= 64 || vard < varc)
416 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
417 else
418 c->scene_change_score+= s->m.qscale;
419 }
420
421 if(level!=s->block_max_depth){
422 put_rac(&s->c, &s->block_state[4 + s_context], 0);
423 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
424 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
425 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
426 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
427 score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
428
429 if(score2 < score && score2 < iscore)
430 return score2;
431 }
432
433 if(iscore < score){
434 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
435 memcpy(pbbak, i_buffer, i_len);
436 s->c= ic;
437 s->c.bytestream_start= pbbak_start;
438 s->c.bytestream= pbbak + i_len;
439 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
440 memcpy(s->block_state, i_state, sizeof(s->block_state));
441 return iscore;
442 }else{
443 memcpy(pbbak, p_buffer, p_len);
444 s->c= pc;
445 s->c.bytestream_start= pbbak_start;
446 s->c.bytestream= pbbak + p_len;
447 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
448 memcpy(s->block_state, p_state, sizeof(s->block_state));
449 return score;
450 }
451}
452
453static void encode_q_branch2(SnowContext *s, int level, int x, int y){
454 const int w= s->b_width << s->block_max_depth;
455 const int rem_depth= s->block_max_depth - level;
456 const int index= (x + y*w) << rem_depth;
457 int trx= (x+1)<<rem_depth;
458 BlockNode *b= &s->block[index];
459 const BlockNode *left = x ? &s->block[index-1] : &null_block;
460 const BlockNode *top = y ? &s->block[index-w] : &null_block;
461 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
462 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
463 int pl = left->color[0];
464 int pcb= left->color[1];
465 int pcr= left->color[2];
466 int pmx, pmy;
467 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
468 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
469 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
470 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
471
472 if(s->keyframe){
473 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
474 return;
475 }
476
477 if(level!=s->block_max_depth){
478 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
479 put_rac(&s->c, &s->block_state[4 + s_context], 1);
480 }else{
481 put_rac(&s->c, &s->block_state[4 + s_context], 0);
482 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
483 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
484 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
485 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
486 return;
487 }
488 }
489 if(b->type & BLOCK_INTRA){
490 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
491 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
492 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
493 if (s->nb_planes > 2) {
494 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
495 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
496 }
497 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
498 }else{
499 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
500 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
501 if(s->ref_frames > 1)
502 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
503 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
504 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
505 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
506 }
507}
508
509static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
510 int i, x2, y2;
511 Plane *p= &s->plane[plane_index];
512 const int block_size = MB_SIZE >> s->block_max_depth;
513 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
514 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
515 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
516 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
517 const int ref_stride= s->current_picture->linesize[plane_index];
518 uint8_t *src= s-> input_picture->data[plane_index];
519 IDWTELEM *dst= (IDWTELEM*)s->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
520 const int b_stride = s->b_width << s->block_max_depth;
521 const int w= p->width;
522 const int h= p->height;
523 int index= mb_x + mb_y*b_stride;
524 BlockNode *b= &s->block[index];
525 BlockNode backup= *b;
526 int ab=0;
527 int aa=0;
528
529 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
530
531 b->type|= BLOCK_INTRA;
532 b->color[plane_index]= 0;
533 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
534
535 for(i=0; i<4; i++){
536 int mb_x2= mb_x + (i &1) - 1;
537 int mb_y2= mb_y + (i>>1) - 1;
538 int x= block_w*mb_x2 + block_w/2;
539 int y= block_h*mb_y2 + block_h/2;
540
541 add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
542 x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
543
544 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
545 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
546 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
547 int obmc_v= obmc[index];
548 int d;
549 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
550 if(x<0) obmc_v += obmc[index + block_w];
551 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
552 if(x+block_w>w) obmc_v += obmc[index - block_w];
553 //FIXME precalculate this or simplify it somehow else
554
555 d = -dst[index] + (1<<(FRAC_BITS-1));
556 dst[index] = d;
557 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
558 aa += obmc_v * obmc_v; //FIXME precalculate this
559 }
560 }
561 }
562 *b= backup;
563
564 return av_clip_uint8( ROUNDED_DIV(ab<<LOG2_OBMC_MAX, aa) ); //FIXME we should not need clipping
565}
566
567static inline int get_block_bits(SnowContext *s, int x, int y, int w){
568 const int b_stride = s->b_width << s->block_max_depth;
569 const int b_height = s->b_height<< s->block_max_depth;
570 int index= x + y*b_stride;
571 const BlockNode *b = &s->block[index];
572 const BlockNode *left = x ? &s->block[index-1] : &null_block;
573 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
574 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
575 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
576 int dmx, dmy;
577// int mx_context= av_log2(2*FFABS(left->mx - top->mx));
578// int my_context= av_log2(2*FFABS(left->my - top->my));
579
580 if(x<0 || x>=b_stride || y>=b_height)
581 return 0;
582/*
5831 0 0
58401X 1-2 1
585001XX 3-6 2-3
5860001XXX 7-14 4-7
58700001XXXX 15-30 8-15
588*/
589//FIXME try accurate rate
590//FIXME intra and inter predictors if surrounding blocks are not the same type
591 if(b->type & BLOCK_INTRA){
592 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
593 + av_log2(2*FFABS(left->color[1] - b->color[1]))
594 + av_log2(2*FFABS(left->color[2] - b->color[2])));
595 }else{
596 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
597 dmx-= b->mx;
598 dmy-= b->my;
599 return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
600 + av_log2(2*FFABS(dmy))
601 + av_log2(2*b->ref));
602 }
603}
604
605static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){
606 Plane *p= &s->plane[plane_index];
607 const int block_size = MB_SIZE >> s->block_max_depth;
608 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
609 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
610 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
611 const int ref_stride= s->current_picture->linesize[plane_index];
612 uint8_t *dst= s->current_picture->data[plane_index];
613 uint8_t *src= s-> input_picture->data[plane_index];
614 IDWTELEM *pred= (IDWTELEM*)s->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4;
615 uint8_t *cur = s->scratchbuf;
616 uint8_t *tmp = s->emu_edge_buffer;
617 const int b_stride = s->b_width << s->block_max_depth;
618 const int b_height = s->b_height<< s->block_max_depth;
619 const int w= p->width;
620 const int h= p->height;
621 int distortion;
622 int rate= 0;
623 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
624 int sx= block_w*mb_x - block_w/2;
625 int sy= block_h*mb_y - block_h/2;
626 int x0= FFMAX(0,-sx);
627 int y0= FFMAX(0,-sy);
628 int x1= FFMIN(block_w*2, w-sx);
629 int y1= FFMIN(block_h*2, h-sy);
630 int i,x,y;
631
632 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
633
634 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);
635
636 for(y=y0; y<y1; y++){
637 const uint8_t *obmc1= obmc_edged[y];
638 const IDWTELEM *pred1 = pred + y*obmc_stride;
639 uint8_t *cur1 = cur + y*ref_stride;
640 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
641 for(x=x0; x<x1; x++){
642#if FRAC_BITS >= LOG2_OBMC_MAX
643 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
644#else
645 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
646#endif
647 v = (v + pred1[x]) >> FRAC_BITS;
648 if(v&(~255)) v= ~(v>>31);
649 dst1[x] = v;
650 }
651 }
652
653 /* copy the regions where obmc[] = (uint8_t)256 */
654 if(LOG2_OBMC_MAX == 8
655 && (mb_x == 0 || mb_x == b_stride-1)
656 && (mb_y == 0 || mb_y == b_height-1)){
657 if(mb_x == 0)
658 x1 = block_w;
659 else
660 x0 = block_w;
661 if(mb_y == 0)
662 y1 = block_h;
663 else
664 y0 = block_h;
665 for(y=y0; y<y1; y++)
666 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
667 }
668
669 if(block_w==16){
670 /* FIXME rearrange dsputil to fit 32x32 cmp functions */
671 /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
672 /* FIXME cmps overlap but do not cover the wavelet's whole support.
673 * So improving the score of one block is not strictly guaranteed
674 * to improve the score of the whole frame, thus iterative motion
675 * estimation does not always converge. */
676 if(s->avctx->me_cmp == FF_CMP_W97)
677 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
678 else if(s->avctx->me_cmp == FF_CMP_W53)
679 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
680 else{
681 distortion = 0;
682 for(i=0; i<4; i++){
683 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
684 distortion += s->mecc.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
685 }
686 }
687 }else{
688 av_assert2(block_w==8);
689 distortion = s->mecc.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
690 }
691
692 if(plane_index==0){
693 for(i=0; i<4; i++){
694/* ..RRr
695 * .RXx.
696 * rxx..
697 */
698 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
699 }
700 if(mb_x == b_stride-2)
701 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
702 }
703 return distortion + rate*penalty_factor;
704}
705
706static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
707 int i, y2;
708 Plane *p= &s->plane[plane_index];
709 const int block_size = MB_SIZE >> s->block_max_depth;
710 const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
711 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
712 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
713 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
714 const int ref_stride= s->current_picture->linesize[plane_index];
715 uint8_t *dst= s->current_picture->data[plane_index];
716 uint8_t *src= s-> input_picture->data[plane_index];
717 //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
718 // const has only been removed from zero_dst to suppress a warning
719 static IDWTELEM zero_dst[4096]; //FIXME
720 const int b_stride = s->b_width << s->block_max_depth;
721 const int w= p->width;
722 const int h= p->height;
723 int distortion= 0;
724 int rate= 0;
725 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
726
727 av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
728
729 for(i=0; i<9; i++){
730 int mb_x2= mb_x + (i%3) - 1;
731 int mb_y2= mb_y + (i/3) - 1;
732 int x= block_w*mb_x2 + block_w/2;
733 int y= block_h*mb_y2 + block_h/2;
734
735 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
736 x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
737
738 //FIXME find a cleaner/simpler way to skip the outside stuff
739 for(y2= y; y2<0; y2++)
740 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
741 for(y2= h; y2<y+block_h; y2++)
742 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
743 if(x<0){
744 for(y2= y; y2<y+block_h; y2++)
745 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
746 }
747 if(x+block_w > w){
748 for(y2= y; y2<y+block_h; y2++)
749 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
750 }
751
752 av_assert1(block_w== 8 || block_w==16);
753 distortion += s->mecc.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
754 }
755
756 if(plane_index==0){
757 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
758 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
759
760/* ..RRRr
761 * .RXXx.
762 * .RXXx.
763 * rxxx.
764 */
765 if(merged)
766 rate = get_block_bits(s, mb_x, mb_y, 2);
767 for(i=merged?4:0; i<9; i++){
768 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
769 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
770 }
771 }
772 return distortion + rate*penalty_factor;
773}
774
775static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
776 const int w= b->width;
777 const int h= b->height;
778 int x, y;
779
780 if(1){
781 int run=0;
782 int *runs = s->run_buffer;
783 int run_index=0;
784 int max_index;
785
786 for(y=0; y<h; y++){
787 for(x=0; x<w; x++){
788 int v, p=0;
789 int /*ll=0, */l=0, lt=0, t=0, rt=0;
790 v= src[x + y*stride];
791
792 if(y){
793 t= src[x + (y-1)*stride];
794 if(x){
795 lt= src[x - 1 + (y-1)*stride];
796 }
797 if(x + 1 < w){
798 rt= src[x + 1 + (y-1)*stride];
799 }
800 }
801 if(x){
802 l= src[x - 1 + y*stride];
803 /*if(x > 1){
804 if(orientation==1) ll= src[y + (x-2)*stride];
805 else ll= src[x - 2 + y*stride];
806 }*/
807 }
808 if(parent){
809 int px= x>>1;
810 int py= y>>1;
811 if(px<b->parent->width && py<b->parent->height)
812 p= parent[px + py*2*stride];
813 }
814 if(!(/*ll|*/l|lt|t|rt|p)){
815 if(v){
816 runs[run_index++]= run;
817 run=0;
818 }else{
819 run++;
820 }
821 }
822 }
823 }
824 max_index= run_index;
825 runs[run_index++]= run;
826 run_index=0;
827 run= runs[run_index++];
828
829 put_symbol2(&s->c, b->state[30], max_index, 0);
830 if(run_index <= max_index)
831 put_symbol2(&s->c, b->state[1], run, 3);
832
833 for(y=0; y<h; y++){
834 if(s->c.bytestream_end - s->c.bytestream < w*40){
835 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
836 return -1;
837 }
838 for(x=0; x<w; x++){
839 int v, p=0;
840 int /*ll=0, */l=0, lt=0, t=0, rt=0;
841 v= src[x + y*stride];
842
843 if(y){
844 t= src[x + (y-1)*stride];
845 if(x){
846 lt= src[x - 1 + (y-1)*stride];
847 }
848 if(x + 1 < w){
849 rt= src[x + 1 + (y-1)*stride];
850 }
851 }
852 if(x){
853 l= src[x - 1 + y*stride];
854 /*if(x > 1){
855 if(orientation==1) ll= src[y + (x-2)*stride];
856 else ll= src[x - 2 + y*stride];
857 }*/
858 }
859 if(parent){
860 int px= x>>1;
861 int py= y>>1;
862 if(px<b->parent->width && py<b->parent->height)
863 p= parent[px + py*2*stride];
864 }
865 if(/*ll|*/l|lt|t|rt|p){
866 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
867
868 put_rac(&s->c, &b->state[0][context], !!v);
869 }else{
870 if(!run){
871 run= runs[run_index++];
872
873 if(run_index <= max_index)
874 put_symbol2(&s->c, b->state[1], run, 3);
875 av_assert2(v);
876 }else{
877 run--;
878 av_assert2(!v);
879 }
880 }
881 if(v){
882 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
883 int l2= 2*FFABS(l) + (l<0);
884 int t2= 2*FFABS(t) + (t<0);
885
886 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
887 put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
888 }
889 }
890 }
891 }
892 return 0;
893}
894
895static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
896// encode_subband_qtree(s, b, src, parent, stride, orientation);
897// encode_subband_z0run(s, b, src, parent, stride, orientation);
898 return encode_subband_c0run(s, b, src, parent, stride, orientation);
899// encode_subband_dzr(s, b, src, parent, stride, orientation);
900}
901
902static 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){
903 const int b_stride= s->b_width << s->block_max_depth;
904 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
905 BlockNode backup= *block;
906 unsigned value;
907 int rd, index;
908
909 av_assert2(mb_x>=0 && mb_y>=0);
910 av_assert2(mb_x<b_stride);
911
912 if(intra){
913 block->color[0] = p[0];
914 block->color[1] = p[1];
915 block->color[2] = p[2];
916 block->type |= BLOCK_INTRA;
917 }else{
918 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
919 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
920 if(s->me_cache[index] == value)
921 return 0;
922 s->me_cache[index]= value;
923
924 block->mx= p[0];
925 block->my= p[1];
926 block->type &= ~BLOCK_INTRA;
927 }
928
929 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged) + s->intra_penalty * !!intra;
930
931//FIXME chroma
932 if(rd < *best_rd){
933 *best_rd= rd;
934 return 1;
935 }else{
936 *block= backup;
937 return 0;
938 }
939}
940
941/* special case for int[2] args we discard afterwards,
942 * fixes compilation problem with gcc 2.95 */
943static 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){
944 int p[2] = {p0, p1};
945 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
946}
947
948static av_always_inline int check_4block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, int ref, int *best_rd){
949 const int b_stride= s->b_width << s->block_max_depth;
950 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
951 BlockNode backup[4];
952 unsigned value;
953 int rd, index;
954
955 /* We don't initialize backup[] during variable declaration, because
956 * that fails to compile on MSVC: "cannot convert from 'BlockNode' to
957 * 'int16_t'". */
958 backup[0] = block[0];
959 backup[1] = block[1];
960 backup[2] = block[b_stride];
961 backup[3] = block[b_stride + 1];
962
963 av_assert2(mb_x>=0 && mb_y>=0);
964 av_assert2(mb_x<b_stride);
965 av_assert2(((mb_x|mb_y)&1) == 0);
966
967 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
968 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
969 if(s->me_cache[index] == value)
970 return 0;
971 s->me_cache[index]= value;
972
973 block->mx= p0;
974 block->my= p1;
975 block->ref= ref;
976 block->type &= ~BLOCK_INTRA;
977 block[1]= block[b_stride]= block[b_stride+1]= *block;
978
979 rd= get_4block_rd(s, mb_x, mb_y, 0);
980
981//FIXME chroma
982 if(rd < *best_rd){
983 *best_rd= rd;
984 return 1;
985 }else{
986 block[0]= backup[0];
987 block[1]= backup[1];
988 block[b_stride]= backup[2];
989 block[b_stride+1]= backup[3];
990 return 0;
991 }
992}
993
994static void iterative_me(SnowContext *s){
995 int pass, mb_x, mb_y;
996 const int b_width = s->b_width << s->block_max_depth;
997 const int b_height= s->b_height << s->block_max_depth;
998 const int b_stride= b_width;
999 int color[3];
1000
1001 {
1002 RangeCoder r = s->c;
1003 uint8_t state[sizeof(s->block_state)];
1004 memcpy(state, s->block_state, sizeof(s->block_state));
1005 for(mb_y= 0; mb_y<s->b_height; mb_y++)
1006 for(mb_x= 0; mb_x<s->b_width; mb_x++)
1007 encode_q_branch(s, 0, mb_x, mb_y);
1008 s->c = r;
1009 memcpy(s->block_state, state, sizeof(s->block_state));
1010 }
1011
1012 for(pass=0; pass<25; pass++){
1013 int change= 0;
1014
1015 for(mb_y= 0; mb_y<b_height; mb_y++){
1016 for(mb_x= 0; mb_x<b_width; mb_x++){
1017 int dia_change, i, j, ref;
1018 int best_rd= INT_MAX, ref_rd;
1019 BlockNode backup, ref_b;
1020 const int index= mb_x + mb_y * b_stride;
1021 BlockNode *block= &s->block[index];
1022 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
1023 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
1024 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
1025 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
1026 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
1027 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
1028 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1029 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1030 const int b_w= (MB_SIZE >> s->block_max_depth);
1031 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
1032
1033 if(pass && (block->type & BLOCK_OPT))
1034 continue;
1035 block->type |= BLOCK_OPT;
1036
1037 backup= *block;
1038
1039 if(!s->me_cache_generation)
1040 memset(s->me_cache, 0, sizeof(s->me_cache));
1041 s->me_cache_generation += 1<<22;
1042
1043 //FIXME precalculate
1044 {
1045 int x, y;
1046 for (y = 0; y < b_w * 2; y++)
1047 memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
1048 if(mb_x==0)
1049 for(y=0; y<b_w*2; y++)
1050 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1051 if(mb_x==b_stride-1)
1052 for(y=0; y<b_w*2; y++)
1053 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1054 if(mb_y==0){
1055 for(x=0; x<b_w*2; x++)
1056 obmc_edged[0][x] += obmc_edged[b_w-1][x];
1057 for(y=1; y<b_w; y++)
1058 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1059 }
1060 if(mb_y==b_height-1){
1061 for(x=0; x<b_w*2; x++)
1062 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1063 for(y=b_w; y<b_w*2-1; y++)
1064 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1065 }
1066 }
1067
1068 //skip stuff outside the picture
1069 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1070 uint8_t *src= s-> input_picture->data[0];
1071 uint8_t *dst= s->current_picture->data[0];
1072 const int stride= s->current_picture->linesize[0];
1073 const int block_w= MB_SIZE >> s->block_max_depth;
1074 const int block_h= MB_SIZE >> s->block_max_depth;
1075 const int sx= block_w*mb_x - block_w/2;
1076 const int sy= block_h*mb_y - block_h/2;
1077 const int w= s->plane[0].width;
1078 const int h= s->plane[0].height;
1079 int y;
1080
1081 for(y=sy; y<0; y++)
1082 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1083 for(y=h; y<sy+block_h*2; y++)
1084 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1085 if(sx<0){
1086 for(y=sy; y<sy+block_h*2; y++)
1087 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1088 }
1089 if(sx+block_w*2 > w){
1090 for(y=sy; y<sy+block_h*2; y++)
1091 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1092 }
1093 }
1094
1095 // intra(black) = neighbors' contribution to the current block
1096 for(i=0; i < s->nb_planes; i++)
1097 color[i]= get_dc(s, mb_x, mb_y, i);
1098
1099 // get previous score (cannot be cached due to OBMC)
1100 if(pass > 0 && (block->type&BLOCK_INTRA)){
1101 int color0[3]= {block->color[0], block->color[1], block->color[2]};
1102 check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);
1103 }else
1104 check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
1105
1106 ref_b= *block;
1107 ref_rd= best_rd;
1108 for(ref=0; ref < s->ref_frames; ref++){
1109 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1110 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1111 continue;
1112 block->ref= ref;
1113 best_rd= INT_MAX;
1114
1115 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
1116 check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
1117 if(tb)
1118 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
1119 if(lb)
1120 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);
1121 if(rb)
1122 check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);
1123 if(bb)
1124 check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
1125
1126 /* fullpel ME */
1127 //FIXME avoid subpel interpolation / round to nearest integer
1128 do{
1129 int newx = block->mx;
1130 int newy = block->my;
1131 int dia_size = s->iterative_dia_size ? s->iterative_dia_size : FFMAX(s->avctx->dia_size, 1);
1132 dia_change=0;
1133 for(i=0; i < dia_size; i++){
1134 for(j=0; j<i; j++){
1135 dia_change |= check_block_inter(s, mb_x, mb_y, newx+4*(i-j), newy+(4*j), obmc_edged, &best_rd);
1136 dia_change |= check_block_inter(s, mb_x, mb_y, newx-4*(i-j), newy-(4*j), obmc_edged, &best_rd);
1137 dia_change |= check_block_inter(s, mb_x, mb_y, newx-(4*j), newy+4*(i-j), obmc_edged, &best_rd);
1138 dia_change |= check_block_inter(s, mb_x, mb_y, newx+(4*j), newy-4*(i-j), obmc_edged, &best_rd);
1139 }
1140 }
1141 }while(dia_change);
1142 /* subpel ME */
1143 do{
1144 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1145 dia_change=0;
1146 for(i=0; i<8; i++)
1147 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
1148 }while(dia_change);
1149 //FIXME or try the standard 2 pass qpel or similar
1150
1151 mvr[0][0]= block->mx;
1152 mvr[0][1]= block->my;
1153 if(ref_rd > best_rd){
1154 ref_rd= best_rd;
1155 ref_b= *block;
1156 }
1157 }
1158 best_rd= ref_rd;
1159 *block= ref_b;
1160 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);
1161 //FIXME RD style color selection
1162 if(!same_block(block, &backup)){
1163 if(tb ) tb ->type &= ~BLOCK_OPT;
1164 if(lb ) lb ->type &= ~BLOCK_OPT;
1165 if(rb ) rb ->type &= ~BLOCK_OPT;
1166 if(bb ) bb ->type &= ~BLOCK_OPT;
1167 if(tlb) tlb->type &= ~BLOCK_OPT;
1168 if(trb) trb->type &= ~BLOCK_OPT;
1169 if(blb) blb->type &= ~BLOCK_OPT;
1170 if(brb) brb->type &= ~BLOCK_OPT;
1171 change ++;
1172 }
1173 }
1174 }
1175 av_log(s->avctx, AV_LOG_DEBUG, "pass:%d changed:%d\n", pass, change);
1176 if(!change)
1177 break;
1178 }
1179
1180 if(s->block_max_depth == 1){
1181 int change= 0;
1182 for(mb_y= 0; mb_y<b_height; mb_y+=2){
1183 for(mb_x= 0; mb_x<b_width; mb_x+=2){
1184 int i;
1185 int best_rd, init_rd;
1186 const int index= mb_x + mb_y * b_stride;
1187 BlockNode *b[4];
1188
1189 b[0]= &s->block[index];
1190 b[1]= b[0]+1;
1191 b[2]= b[0]+b_stride;
1192 b[3]= b[2]+1;
1193 if(same_block(b[0], b[1]) &&
1194 same_block(b[0], b[2]) &&
1195 same_block(b[0], b[3]))
1196 continue;
1197
1198 if(!s->me_cache_generation)
1199 memset(s->me_cache, 0, sizeof(s->me_cache));
1200 s->me_cache_generation += 1<<22;
1201
1202 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1203
1204 //FIXME more multiref search?
1205 check_4block_inter(s, mb_x, mb_y,
1206 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1207 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1208
1209 for(i=0; i<4; i++)
1210 if(!(b[i]->type&BLOCK_INTRA))
1211 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1212
1213 if(init_rd != best_rd)
1214 change++;
1215 }
1216 }
1217 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1218 }
1219}
1220
1221static void encode_blocks(SnowContext *s, int search){
1222 int x, y;
1223 int w= s->b_width;
1224 int h= s->b_height;
1225
1226 if(s->motion_est == FF_ME_ITER && !s->keyframe && search)
1227 iterative_me(s);
1228
1229 for(y=0; y<h; y++){
1230 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1231 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1232 return;
1233 }
1234 for(x=0; x<w; x++){
1235 if(s->motion_est == FF_ME_ITER || !search)
1236 encode_q_branch2(s, 0, x, y);
1237 else
1238 encode_q_branch (s, 0, x, y);
1239 }
1240 }
1241}
1242
1243static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1244 const int w= b->width;
1245 const int h= b->height;
1246 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1247 const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1248 int x,y, thres1, thres2;
1249
1250 if(s->qlog == LOSSLESS_QLOG){
1251 for(y=0; y<h; y++)
1252 for(x=0; x<w; x++)
1253 dst[x + y*stride]= src[x + y*stride];
1254 return;
1255 }
1256
1257 bias= bias ? 0 : (3*qmul)>>3;
1258 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1259 thres2= 2*thres1;
1260
1261 if(!bias){
1262 for(y=0; y<h; y++){
1263 for(x=0; x<w; x++){
1264 int i= src[x + y*stride];
1265
1266 if((unsigned)(i+thres1) > thres2){
1267 if(i>=0){
1268 i<<= QEXPSHIFT;
1269 i/= qmul; //FIXME optimize
1270 dst[x + y*stride]= i;
1271 }else{
1272 i= -i;
1273 i<<= QEXPSHIFT;
1274 i/= qmul; //FIXME optimize
1275 dst[x + y*stride]= -i;
1276 }
1277 }else
1278 dst[x + y*stride]= 0;
1279 }
1280 }
1281 }else{
1282 for(y=0; y<h; y++){
1283 for(x=0; x<w; x++){
1284 int i= src[x + y*stride];
1285
1286 if((unsigned)(i+thres1) > thres2){
1287 if(i>=0){
1288 i<<= QEXPSHIFT;
1289 i= (i + bias) / qmul; //FIXME optimize
1290 dst[x + y*stride]= i;
1291 }else{
1292 i= -i;
1293 i<<= QEXPSHIFT;
1294 i= (i + bias) / qmul; //FIXME optimize
1295 dst[x + y*stride]= -i;
1296 }
1297 }else
1298 dst[x + y*stride]= 0;
1299 }
1300 }
1301 }
1302}
1303
1304static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1305 const int w= b->width;
1306 const int h= b->height;
1307 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1308 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1309 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1310 int x,y;
1311
1312 if(s->qlog == LOSSLESS_QLOG) return;
1313
1314 for(y=0; y<h; y++){
1315 for(x=0; x<w; x++){
1316 int i= src[x + y*stride];
1317 if(i<0){
1318 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1319 }else if(i>0){
1320 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1321 }
1322 }
1323 }
1324}
1325
1326static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1327 const int w= b->width;
1328 const int h= b->height;
1329 int x,y;
1330
1331 for(y=h-1; y>=0; y--){
1332 for(x=w-1; x>=0; x--){
1333 int i= x + y*stride;
1334
1335 if(x){
1336 if(use_median){
1337 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1338 else src[i] -= src[i - 1];
1339 }else{
1340 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1341 else src[i] -= src[i - 1];
1342 }
1343 }else{
1344 if(y) src[i] -= src[i - stride];
1345 }
1346 }
1347 }
1348}
1349
1350static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1351 const int w= b->width;
1352 const int h= b->height;
1353 int x,y;
1354
1355 for(y=0; y<h; y++){
1356 for(x=0; x<w; x++){
1357 int i= x + y*stride;
1358
1359 if(x){
1360 if(use_median){
1361 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1362 else src[i] += src[i - 1];
1363 }else{
1364 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1365 else src[i] += src[i - 1];
1366 }
1367 }else{
1368 if(y) src[i] += src[i - stride];
1369 }
1370 }
1371 }
1372}
1373
1374static void encode_qlogs(SnowContext *s){
1375 int plane_index, level, orientation;
1376
1377 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1378 for(level=0; level<s->spatial_decomposition_count; level++){
1379 for(orientation=level ? 1:0; orientation<4; orientation++){
1380 if(orientation==2) continue;
1381 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1382 }
1383 }
1384 }
1385}
1386
1387static void encode_header(SnowContext *s){
1388 int plane_index, i;
1389 uint8_t kstate[32];
1390
1391 memset(kstate, MID_STATE, sizeof(kstate));
1392
1393 put_rac(&s->c, kstate, s->keyframe);
1394 if(s->keyframe || s->always_reset){
1395 ff_snow_reset_contexts(s);
1396 s->last_spatial_decomposition_type=
1397 s->last_qlog=
1398 s->last_qbias=
1399 s->last_mv_scale=
1400 s->last_block_max_depth= 0;
1401 for(plane_index=0; plane_index<2; plane_index++){
1402 Plane *p= &s->plane[plane_index];
1403 p->last_htaps=0;
1404 p->last_diag_mc=0;
1405 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1406 }
1407 }
1408 if(s->keyframe){
1409 put_symbol(&s->c, s->header_state, s->version, 0);
1410 put_rac(&s->c, s->header_state, s->always_reset);
1411 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1412 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1413 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1414 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1415 if (s->nb_planes > 2) {
1416 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1417 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1418 }
1419 put_rac(&s->c, s->header_state, s->spatial_scalability);
1420// put_rac(&s->c, s->header_state, s->rate_scalability);
1421 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1422
1423 encode_qlogs(s);
1424 }
1425
1426 if(!s->keyframe){
1427 int update_mc=0;
1428 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1429 Plane *p= &s->plane[plane_index];
1430 update_mc |= p->last_htaps != p->htaps;
1431 update_mc |= p->last_diag_mc != p->diag_mc;
1432 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1433 }
1434 put_rac(&s->c, s->header_state, update_mc);
1435 if(update_mc){
1436 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1437 Plane *p= &s->plane[plane_index];
1438 put_rac(&s->c, s->header_state, p->diag_mc);
1439 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1440 for(i= p->htaps/2; i; i--)
1441 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1442 }
1443 }
1444 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1445 put_rac(&s->c, s->header_state, 1);
1446 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1447 encode_qlogs(s);
1448 }else
1449 put_rac(&s->c, s->header_state, 0);
1450 }
1451
1452 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1453 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
1454 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
1455 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
1456 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1457
1458}
1459
1460static void update_last_header_values(SnowContext *s){
1461 int plane_index;
1462
1463 if(!s->keyframe){
1464 for(plane_index=0; plane_index<2; plane_index++){
1465 Plane *p= &s->plane[plane_index];
1466 p->last_diag_mc= p->diag_mc;
1467 p->last_htaps = p->htaps;
1468 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1469 }
1470 }
1471
1472 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
1473 s->last_qlog = s->qlog;
1474 s->last_qbias = s->qbias;
1475 s->last_mv_scale = s->mv_scale;
1476 s->last_block_max_depth = s->block_max_depth;
1477 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1478}
1479
1480static int qscale2qlog(int qscale){
1481 return lrint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))
1482 + 61*QROOT/8; ///< 64 > 60
1483}
1484
1485static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1486{
1487 /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1488 * FIXME we know exact mv bits at this point,
1489 * but ratecontrol isn't set up to include them. */
1490 uint32_t coef_sum= 0;
1491 int level, orientation, delta_qlog;
1492
1493 for(level=0; level<s->spatial_decomposition_count; level++){
1494 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1495 SubBand *b= &s->plane[0].band[level][orientation];
1496 IDWTELEM *buf= b->ibuf;
1497 const int w= b->width;
1498 const int h= b->height;
1499 const int stride= b->stride;
1500 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1501 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1502 const int qdiv= (1<<16)/qmul;
1503 int x, y;
1504 //FIXME this is ugly
1505 for(y=0; y<h; y++)
1506 for(x=0; x<w; x++)
1507 buf[x+y*stride]= b->buf[x+y*stride];
1508 if(orientation==0)
1509 decorrelate(s, b, buf, stride, 1, 0);
1510 for(y=0; y<h; y++)
1511 for(x=0; x<w; x++)
1512 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1513 }
1514 }
1515
1516 /* ugly, ratecontrol just takes a sqrt again */
1517 av_assert0(coef_sum < INT_MAX);
1518 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1519
1520 if(pict->pict_type == AV_PICTURE_TYPE_I){
1521 s->m.current_picture.mb_var_sum= coef_sum;
1522 s->m.current_picture.mc_mb_var_sum= 0;
1523 }else{
1524 s->m.current_picture.mc_mb_var_sum= coef_sum;
1525 s->m.current_picture.mb_var_sum= 0;
1526 }
1527
1528 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1529 if (pict->quality < 0)
1530 return INT_MIN;
1531 s->lambda= pict->quality * 3/2;
1532 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1533 s->qlog+= delta_qlog;
1534 return delta_qlog;
1535}
1536
1537static void calculate_visual_weight(SnowContext *s, Plane *p){
1538 int width = p->width;
1539 int height= p->height;
1540 int level, orientation, x, y;
1541
1542 for(level=0; level<s->spatial_decomposition_count; level++){
1543 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1544 SubBand *b= &p->band[level][orientation];
1545 IDWTELEM *ibuf= b->ibuf;
1546 int64_t error=0;
1547
1548 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1549 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1550 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1551 for(y=0; y<height; y++){
1552 for(x=0; x<width; x++){
1553 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1554 error += d*d;
1555 }
1556 }
1557
1558 b->qlog= (int)(QROOT * log2(352256.0/sqrt(error)) + 0.5);
1559 }
1560 }
1561}
1562
1563static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1564 const AVFrame *pict, int *got_packet)
1565{
1566 SnowContext *s = avctx->priv_data;
1567 RangeCoder * const c= &s->c;
1568 AVFrame *pic;
1569 const int width= s->avctx->width;
1570 const int height= s->avctx->height;
1571 int level, orientation, plane_index, i, y, ret;
1572 uint8_t rc_header_bak[sizeof(s->header_state)];
1573 uint8_t rc_block_bak[sizeof(s->block_state)];
1574
1575 if ((ret = ff_alloc_packet2(avctx, pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
1576 return ret;
1577
1578 ff_init_range_encoder(c, pkt->data, pkt->size);
1579 ff_build_rac_states(c, (1LL<<32)/20, 256-8);
1580
1581 for(i=0; i < s->nb_planes; i++){
1582 int hshift= i ? s->chroma_h_shift : 0;
1583 int vshift= i ? s->chroma_v_shift : 0;
1584 for(y=0; y<AV_CEIL_RSHIFT(height, vshift); y++)
1585 memcpy(&s->input_picture->data[i][y * s->input_picture->linesize[i]],
1586 &pict->data[i][y * pict->linesize[i]],
1587 AV_CEIL_RSHIFT(width, hshift));
1588 s->mpvencdsp.draw_edges(s->input_picture->data[i], s->input_picture->linesize[i],
1589 AV_CEIL_RSHIFT(width, hshift), AV_CEIL_RSHIFT(height, vshift),
1590 EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
1591 EDGE_TOP | EDGE_BOTTOM);
1592
1593 }
1594 emms_c();
1595 pic = s->input_picture;
1596 pic->pict_type = pict->pict_type;
1597 pic->quality = pict->quality;
1598
1599 s->m.picture_number= avctx->frame_number;
1600 if(avctx->flags&AV_CODEC_FLAG_PASS2){
1601 s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1602 s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
1603 if(!(avctx->flags&AV_CODEC_FLAG_QSCALE)) {
1604 pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1605 if (pic->quality < 0)
1606 return -1;
1607 }
1608 }else{
1609 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1610 s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1611 }
1612
1613 if(s->pass1_rc && avctx->frame_number == 0)
1614 pic->quality = 2*FF_QP2LAMBDA;
1615 if (pic->quality) {
1616 s->qlog = qscale2qlog(pic->quality);
1617 s->lambda = pic->quality * 3/2;
1618 }
1619 if (s->qlog < 0 || (!pic->quality && (avctx->flags & AV_CODEC_FLAG_QSCALE))) {
1620 s->qlog= LOSSLESS_QLOG;
1621 s->lambda = 0;
1622 }//else keep previous frame's qlog until after motion estimation
1623
1624 if (s->current_picture->data[0]
1625#if FF_API_EMU_EDGE
1626 && !(s->avctx->flags&CODEC_FLAG_EMU_EDGE)
1627#endif
1628 ) {
1629 int w = s->avctx->width;
1630 int h = s->avctx->height;
1631
1632 s->mpvencdsp.draw_edges(s->current_picture->data[0],
1633 s->current_picture->linesize[0], w , h ,
1634 EDGE_WIDTH , EDGE_WIDTH , EDGE_TOP | EDGE_BOTTOM);
1635 if (s->current_picture->data[2]) {
1636 s->mpvencdsp.draw_edges(s->current_picture->data[1],
1637 s->current_picture->linesize[1], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
1638 EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
1639 s->mpvencdsp.draw_edges(s->current_picture->data[2],
1640 s->current_picture->linesize[2], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
1641 EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
1642 }
1643 emms_c();
1644 }
1645
1646 ff_snow_frame_start(s);
1647 av_frame_unref(avctx->coded_frame);
1648 ret = av_frame_ref(avctx->coded_frame, s->current_picture);
1649 if (ret < 0)
1650 return ret;
1651
1652 s->m.current_picture_ptr= &s->m.current_picture;
1653 s->m.current_picture.f = s->current_picture;
1654 s->m.current_picture.f->pts = pict->pts;
1655 if(pic->pict_type == AV_PICTURE_TYPE_P){
1656 int block_width = (width +15)>>4;
1657 int block_height= (height+15)>>4;
1658 int stride= s->current_picture->linesize[0];
1659
1660 av_assert0(s->current_picture->data[0]);
1661 av_assert0(s->last_picture[0]->data[0]);
1662
1663 s->m.avctx= s->avctx;
1664 s->m. last_picture.f = s->last_picture[0];
1665 s->m. new_picture.f = s->input_picture;
1666 s->m. last_picture_ptr= &s->m. last_picture;
1667 s->m.linesize = stride;
1668 s->m.uvlinesize= s->current_picture->linesize[1];
1669 s->m.width = width;
1670 s->m.height= height;
1671 s->m.mb_width = block_width;
1672 s->m.mb_height= block_height;
1673 s->m.mb_stride= s->m.mb_width+1;
1674 s->m.b8_stride= 2*s->m.mb_width+1;
1675 s->m.f_code=1;
1676 s->m.pict_type = pic->pict_type;
1677#if FF_API_MOTION_EST
1678 s->m.me_method= s->avctx->me_method;
1679#endif
1680 s->m.motion_est= s->motion_est;
1681 s->m.me.scene_change_score=0;
1682 s->m.me.dia_size = avctx->dia_size;
1683 s->m.quarter_sample= (s->avctx->flags & AV_CODEC_FLAG_QPEL)!=0;
1684 s->m.out_format= FMT_H263;
1685 s->m.unrestricted_mv= 1;
1686
1687 s->m.lambda = s->lambda;
1688 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1689 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1690
1691 s->m.mecc= s->mecc; //move
1692 s->m.qdsp= s->qdsp; //move
1693 s->m.hdsp = s->hdsp;
1694 ff_init_me(&s->m);
1695 s->hdsp = s->m.hdsp;
1696 s->mecc= s->m.mecc;
1697 }
1698
1699 if(s->pass1_rc){
1700 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1701 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1702 }
1703
1704redo_frame:
1705
1706 s->spatial_decomposition_count= 5;
1707
1708 while( !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
1709 || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
1710 s->spatial_decomposition_count--;
1711
1712 if (s->spatial_decomposition_count <= 0) {
1713 av_log(avctx, AV_LOG_ERROR, "Resolution too low\n");
1714 return AVERROR(EINVAL);
1715 }
1716
1717 s->m.pict_type = pic->pict_type;
1718 s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
1719
1720 ff_snow_common_init_after_header(avctx);
1721
1722 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1723 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1724 calculate_visual_weight(s, &s->plane[plane_index]);
1725 }
1726 }
1727
1728 encode_header(s);
1729 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1730 encode_blocks(s, 1);
1731 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1732
1733 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1734 Plane *p= &s->plane[plane_index];
1735 int w= p->width;
1736 int h= p->height;
1737 int x, y;
1738// int bits= put_bits_count(&s->c.pb);
1739
1740 if (!s->memc_only) {
1741 //FIXME optimize
1742 if(pict->data[plane_index]) //FIXME gray hack
1743 for(y=0; y<h; y++){
1744 for(x=0; x<w; x++){
1745 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1746 }
1747 }
1748 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1749
1750#if FF_API_PRIVATE_OPT
1751FF_DISABLE_DEPRECATION_WARNINGS
1752 if(s->avctx->scenechange_threshold)
1753 s->scenechange_threshold = s->avctx->scenechange_threshold;
1754FF_ENABLE_DEPRECATION_WARNINGS
1755#endif
1756
1757 if( plane_index==0
1758 && pic->pict_type == AV_PICTURE_TYPE_P
1759 && !(avctx->flags&AV_CODEC_FLAG_PASS2)
1760 && s->m.me.scene_change_score > s->scenechange_threshold){
1761 ff_init_range_encoder(c, pkt->data, pkt->size);
1762 ff_build_rac_states(c, (1LL<<32)/20, 256-8);
1763 pic->pict_type= AV_PICTURE_TYPE_I;
1764 s->keyframe=1;
1765 s->current_picture->key_frame=1;
1766 goto redo_frame;
1767 }
1768
1769 if(s->qlog == LOSSLESS_QLOG){
1770 for(y=0; y<h; y++){
1771 for(x=0; x<w; x++){
1772 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1773 }
1774 }
1775 }else{
1776 for(y=0; y<h; y++){
1777 for(x=0; x<w; x++){
1778 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1779 }
1780 }
1781 }
1782
1783 ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1784
1785 if(s->pass1_rc && plane_index==0){
1786 int delta_qlog = ratecontrol_1pass(s, pic);
1787 if (delta_qlog <= INT_MIN)
1788 return -1;
1789 if(delta_qlog){
1790 //reordering qlog in the bitstream would eliminate this reset
1791 ff_init_range_encoder(c, pkt->data, pkt->size);
1792 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
1793 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
1794 encode_header(s);
1795 encode_blocks(s, 0);
1796 }
1797 }
1798
1799 for(level=0; level<s->spatial_decomposition_count; level++){
1800 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1801 SubBand *b= &p->band[level][orientation];
1802
1803 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1804 if(orientation==0)
1805 decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
1806 if (!s->no_bitstream)
1807 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1808 av_assert0(b->parent==NULL || b->parent->stride == b->stride*2);
1809 if(orientation==0)
1810 correlate(s, b, b->ibuf, b->stride, 1, 0);
1811 }
1812 }
1813
1814 for(level=0; level<s->spatial_decomposition_count; level++){
1815 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1816 SubBand *b= &p->band[level][orientation];
1817
1818 dequantize(s, b, b->ibuf, b->stride);
1819 }
1820 }
1821
1822 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1823 if(s->qlog == LOSSLESS_QLOG){
1824 for(y=0; y<h; y++){
1825 for(x=0; x<w; x++){
1826 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1827 }
1828 }
1829 }
1830 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1831 }else{
1832 //ME/MC only
1833 if(pic->pict_type == AV_PICTURE_TYPE_I){
1834 for(y=0; y<h; y++){
1835 for(x=0; x<w; x++){
1836 s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x]=
1837 pict->data[plane_index][y*pict->linesize[plane_index] + x];
1838 }
1839 }
1840 }else{
1841 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1842 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1843 }
1844 }
1845 if(s->avctx->flags&AV_CODEC_FLAG_PSNR){
1846 int64_t error= 0;
1847
1848 if(pict->data[plane_index]) //FIXME gray hack
1849 for(y=0; y<h; y++){
1850 for(x=0; x<w; x++){
1851 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];
1852 error += d*d;
1853 }
1854 }
1855 s->avctx->error[plane_index] += error;
1856 s->encoding_error[plane_index] = error;
1857 }
1858
1859 }
1860 emms_c();
1861
1862 update_last_header_values(s);
1863
1864 ff_snow_release_buffer(avctx);
1865
1866 s->current_picture->coded_picture_number = avctx->frame_number;
1867 s->current_picture->pict_type = pic->pict_type;
1868 s->current_picture->quality = pic->quality;
1869 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1870 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1871 s->m.current_picture.f->display_picture_number =
1872 s->m.current_picture.f->coded_picture_number = avctx->frame_number;
1873 s->m.current_picture.f->quality = pic->quality;
1874 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1875 if(s->pass1_rc)
1876 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1877 return -1;
1878 if(avctx->flags&AV_CODEC_FLAG_PASS1)
1879 ff_write_pass1_stats(&s->m);
1880 s->m.last_pict_type = s->m.pict_type;
1881 avctx->frame_bits = s->m.frame_bits;
1882 avctx->mv_bits = s->m.mv_bits;
1883 avctx->misc_bits = s->m.misc_bits;
1884 avctx->p_tex_bits = s->m.p_tex_bits;
1885
1886 emms_c();
1887
1888 ff_side_data_set_encoder_stats(pkt, s->current_picture->quality,
1889 s->encoding_error,
1890 (s->avctx->flags&AV_CODEC_FLAG_PSNR) ? 4 : 0,
1891 s->current_picture->pict_type);
1892
1893#if FF_API_ERROR_FRAME
1894FF_DISABLE_DEPRECATION_WARNINGS
1895 memcpy(s->current_picture->error, s->encoding_error, sizeof(s->encoding_error));
1896FF_ENABLE_DEPRECATION_WARNINGS
1897#endif
1898
1899 pkt->size = ff_rac_terminate(c);
1900 if (s->current_picture->key_frame)
1901 pkt->flags |= AV_PKT_FLAG_KEY;
1902 *got_packet = 1;
1903
1904 return 0;
1905}
1906
1907static av_cold int encode_end(AVCodecContext *avctx)
1908{
1909 SnowContext *s = avctx->priv_data;
1910
1911 ff_snow_common_end(s);
1912 ff_rate_control_uninit(&s->m);
1913 av_frame_free(&s->input_picture);
1914 av_freep(&avctx->stats_out);
1915
1916 return 0;
1917}
1918
1919#define OFFSET(x) offsetof(SnowContext, x)
1920#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1921static const AVOption options[] = {
1922 FF_MPV_COMMON_OPTS
1923 { "iter", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ITER }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" },
1924 { "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1925 { "no_bitstream", "Skip final bitstream writeout.", OFFSET(no_bitstream), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1926 { "intra_penalty", "Penalty for intra blocks in block decission", OFFSET(intra_penalty), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
1927 { "iterative_dia_size", "Dia size for the iterative ME", OFFSET(iterative_dia_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
1928 { "sc_threshold", "Scene change threshold", OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, VE },
1929 { "pred", "Spatial decomposition type", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 0 }, DWT_97, DWT_53, VE, "pred" },
1930 { "dwt97", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "pred" },
1931 { "dwt53", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
1932 { NULL },
1933};
1934
1935static const AVClass snowenc_class = {
1936 .class_name = "snow encoder",
1937 .item_name = av_default_item_name,
1938 .option = options,
1939 .version = LIBAVUTIL_VERSION_INT,
1940};
1941
1942AVCodec ff_snow_encoder = {
1943 .name = "snow",
1944 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
1945 .type = AVMEDIA_TYPE_VIDEO,
1946 .id = AV_CODEC_ID_SNOW,
1947 .priv_data_size = sizeof(SnowContext),
1948 .init = encode_init,
1949 .encode2 = encode_frame,
1950 .close = encode_end,
1951 .pix_fmts = (const enum AVPixelFormat[]){
1952 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,
1953 AV_PIX_FMT_GRAY8,
1954 AV_PIX_FMT_NONE
1955 },
1956 .priv_class = &snowenc_class,
1957 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
1958 FF_CODEC_CAP_INIT_CLEANUP,
1959};
1960
generated by cgit at 2024-05-17 04:46:37 (GMT)