snow: refactor code to work around a compiler bug in MSVC.
[libav.git] / libavcodec / snowenc.c
CommitLineData
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1/*
2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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/log.h"
23#include "libavutil/opt.h"
24#include "avcodec.h"
25#include "dsputil.h"
26#include "dwt.h"
27#include "snow.h"
28
29#include "rangecoder.h"
30#include "mathops.h"
31
32#include "mpegvideo.h"
33#include "h263.h"
34
35#undef NDEBUG
36#include <assert.h>
37
38#define QUANTIZE2 0
39
40#if QUANTIZE2==1
41#define Q2_STEP 8
42
43static void find_sse(SnowContext *s, Plane *p, int *score, int score_stride, IDWTELEM *r0, IDWTELEM *r1, int level, int orientation){
44 SubBand *b= &p->band[level][orientation];
45 int x, y;
46 int xo=0;
47 int yo=0;
48 int step= 1 << (s->spatial_decomposition_count - level);
49
50 if(orientation&1)
51 xo= step>>1;
52 if(orientation&2)
53 yo= step>>1;
54
55 //FIXME bias for nonzero ?
56 //FIXME optimize
57 memset(score, 0, sizeof(*score)*score_stride*((p->height + Q2_STEP-1)/Q2_STEP));
58 for(y=0; y<p->height; y++){
59 for(x=0; x<p->width; x++){
60 int sx= (x-xo + step/2) / step / Q2_STEP;
61 int sy= (y-yo + step/2) / step / Q2_STEP;
62 int v= r0[x + y*p->width] - r1[x + y*p->width];
63 assert(sx>=0 && sy>=0 && sx < score_stride);
64 v= ((v+8)>>4)<<4;
65 score[sx + sy*score_stride] += v*v;
66 assert(score[sx + sy*score_stride] >= 0);
67 }
68 }
69}
70
71static void dequantize_all(SnowContext *s, Plane *p, IDWTELEM *buffer, int width, int height){
72 int level, orientation;
73
74 for(level=0; level<s->spatial_decomposition_count; level++){
75 for(orientation=level ? 1 : 0; orientation<4; orientation++){
76 SubBand *b= &p->band[level][orientation];
77 IDWTELEM *dst= buffer + (b->ibuf - s->spatial_idwt_buffer);
78
79 dequantize(s, b, dst, b->stride);
80 }
81 }
82}
83
84static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, int height, int stride, int type){
85 int level, orientation, ys, xs, x, y, pass;
86 IDWTELEM best_dequant[height * stride];
87 IDWTELEM idwt2_buffer[height * stride];
88 const int score_stride= (width + 10)/Q2_STEP;
89 int best_score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
90 int score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
91 int threshold= (s->m.lambda * s->m.lambda) >> 6;
92
93 //FIXME pass the copy cleanly ?
94
95// memcpy(dwt_buffer, buffer, height * stride * sizeof(DWTELEM));
d9669eab 96 ff_spatial_dwt(buffer, s->temp_dwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
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97
98 for(level=0; level<s->spatial_decomposition_count; level++){
99 for(orientation=level ? 1 : 0; orientation<4; orientation++){
100 SubBand *b= &p->band[level][orientation];
101 IDWTELEM *dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
102 DWTELEM *src= buffer + (b-> buf - s->spatial_dwt_buffer);
103 assert(src == b->buf); // code does not depend on this but it is true currently
104
105 quantize(s, b, dst, src, b->stride, s->qbias);
106 }
107 }
108 for(pass=0; pass<1; pass++){
109 if(s->qbias == 0) //keyframe
110 continue;
111 for(level=0; level<s->spatial_decomposition_count; level++){
112 for(orientation=level ? 1 : 0; orientation<4; orientation++){
113 SubBand *b= &p->band[level][orientation];
114 IDWTELEM *dst= idwt2_buffer + (b->ibuf - s->spatial_idwt_buffer);
115 IDWTELEM *best_dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
116
117 for(ys= 0; ys<Q2_STEP; ys++){
118 for(xs= 0; xs<Q2_STEP; xs++){
119 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
120 dequantize_all(s, p, idwt2_buffer, width, height);
d9669eab 121 ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
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122 find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
123 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
124 for(y=ys; y<b->height; y+= Q2_STEP){
125 for(x=xs; x<b->width; x+= Q2_STEP){
126 if(dst[x + y*b->stride]<0) dst[x + y*b->stride]++;
127 if(dst[x + y*b->stride]>0) dst[x + y*b->stride]--;
128 //FIXME try more than just --
129 }
130 }
131 dequantize_all(s, p, idwt2_buffer, width, height);
d9669eab 132 ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
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133 find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
134 for(y=ys; y<b->height; y+= Q2_STEP){
135 for(x=xs; x<b->width; x+= Q2_STEP){
136 int score_idx= x/Q2_STEP + (y/Q2_STEP)*score_stride;
137 if(score[score_idx] <= best_score[score_idx] + threshold){
138 best_score[score_idx]= score[score_idx];
139 if(best_dst[x + y*b->stride]<0) best_dst[x + y*b->stride]++;
140 if(best_dst[x + y*b->stride]>0) best_dst[x + y*b->stride]--;
141 //FIXME copy instead
142 }
143 }
144 }
145 }
146 }
147 }
148 }
149 }
150 memcpy(s->spatial_idwt_buffer, best_dequant, height * stride * sizeof(IDWTELEM)); //FIXME work with that directly instead of copy at the end
151}
152
153#endif /* QUANTIZE2==1 */
154
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155static av_cold int encode_init(AVCodecContext *avctx)
156{
157 SnowContext *s = avctx->priv_data;
4d8516fd 158 int plane_index, ret;
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159
160 if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
161 av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
162 "Use vstrict=-2 / -strict -2 to use it anyway.\n");
163 return -1;
164 }
165
166 if(avctx->prediction_method == DWT_97
167 && (avctx->flags & CODEC_FLAG_QSCALE)
168 && avctx->global_quality == 0){
169 av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
170 return -1;
171 }
172
173 s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
174
175 s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
176 s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
177
178 for(plane_index=0; plane_index<3; plane_index++){
179 s->plane[plane_index].diag_mc= 1;
180 s->plane[plane_index].htaps= 6;
181 s->plane[plane_index].hcoeff[0]= 40;
182 s->plane[plane_index].hcoeff[1]= -10;
183 s->plane[plane_index].hcoeff[2]= 2;
184 s->plane[plane_index].fast_mc= 1;
185 }
186
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187 if ((ret = ff_snow_common_init(avctx)) < 0) {
188 ff_snow_common_end(avctx->priv_data);
189 return ret;
190 }
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191 ff_snow_alloc_blocks(s);
192
193 s->version=0;
194
195 s->m.avctx = avctx;
196 s->m.flags = avctx->flags;
197 s->m.bit_rate= avctx->bit_rate;
198
199 s->m.me.temp =
200 s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
201 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
202 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
203 s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
ddce8953 204 ff_h263_encode_init(&s->m); //mv_penalty
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205
206 s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
207
208 if(avctx->flags&CODEC_FLAG_PASS1){
209 if(!avctx->stats_out)
210 avctx->stats_out = av_mallocz(256);
211 }
212 if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
213 if(ff_rate_control_init(&s->m) < 0)
214 return -1;
215 }
216 s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
217
218 avctx->coded_frame= &s->current_picture;
219 switch(avctx->pix_fmt){
220// case PIX_FMT_YUV444P:
221// case PIX_FMT_YUV422P:
222 case PIX_FMT_YUV420P:
223 case PIX_FMT_GRAY8:
224// case PIX_FMT_YUV411P:
225// case PIX_FMT_YUV410P:
226 s->colorspace_type= 0;
227 break;
228/* case PIX_FMT_RGB32:
229 s->colorspace= 1;
230 break;*/
231 default:
232 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
233 return -1;
234 }
235// avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
236 s->chroma_h_shift= 1;
237 s->chroma_v_shift= 1;
238
239 ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
240 ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
241
242 s->avctx->get_buffer(s->avctx, &s->input_picture);
243
244 if(s->avctx->me_method == ME_ITER){
245 int i;
246 int size= s->b_width * s->b_height << 2*s->block_max_depth;
247 for(i=0; i<s->max_ref_frames; i++){
248 s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
249 s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
250 }
251 }
252
253 return 0;
254}
255
256//near copy & paste from dsputil, FIXME
257static int pix_sum(uint8_t * pix, int line_size, int w)
258{
259 int s, i, j;
260
261 s = 0;
262 for (i = 0; i < w; i++) {
263 for (j = 0; j < w; j++) {
264 s += pix[0];
265 pix ++;
266 }
267 pix += line_size - w;
268 }
269 return s;
270}
271
272//near copy & paste from dsputil, FIXME
273static int pix_norm1(uint8_t * pix, int line_size, int w)
274{
275 int s, i, j;
276 uint32_t *sq = ff_squareTbl + 256;
277
278 s = 0;
279 for (i = 0; i < w; i++) {
280 for (j = 0; j < w; j ++) {
281 s += sq[pix[0]];
282 pix ++;
283 }
284 pix += line_size - w;
285 }
286 return s;
287}
288
289//FIXME copy&paste
290#define P_LEFT P[1]
291#define P_TOP P[2]
292#define P_TOPRIGHT P[3]
293#define P_MEDIAN P[4]
294#define P_MV1 P[9]
295#define FLAG_QPEL 1 //must be 1
296
297static int encode_q_branch(SnowContext *s, int level, int x, int y){
298 uint8_t p_buffer[1024];
299 uint8_t i_buffer[1024];
300 uint8_t p_state[sizeof(s->block_state)];
301 uint8_t i_state[sizeof(s->block_state)];
302 RangeCoder pc, ic;
303 uint8_t *pbbak= s->c.bytestream;
304 uint8_t *pbbak_start= s->c.bytestream_start;
305 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
306 const int w= s->b_width << s->block_max_depth;
307 const int h= s->b_height << s->block_max_depth;
308 const int rem_depth= s->block_max_depth - level;
309 const int index= (x + y*w) << rem_depth;
310 const int block_w= 1<<(LOG2_MB_SIZE - level);
311 int trx= (x+1)<<rem_depth;
312 int try= (y+1)<<rem_depth;
313 const BlockNode *left = x ? &s->block[index-1] : &null_block;
314 const BlockNode *top = y ? &s->block[index-w] : &null_block;
315 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
316 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
317 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
318 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
319 int pl = left->color[0];
320 int pcb= left->color[1];
321 int pcr= left->color[2];
322 int pmx, pmy;
323 int mx=0, my=0;
324 int l,cr,cb;
325 const int stride= s->current_picture.linesize[0];
326 const int uvstride= s->current_picture.linesize[1];
327 uint8_t *current_data[3]= { s->input_picture.data[0] + (x + y* stride)*block_w,
328 s->input_picture.data[1] + (x + y*uvstride)*block_w/2,
329 s->input_picture.data[2] + (x + y*uvstride)*block_w/2};
330 int P[10][2];
331 int16_t last_mv[3][2];
332 int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
333 const int shift= 1+qpel;
334 MotionEstContext *c= &s->m.me;
335 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
336 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
337 int my_context= av_log2(2*FFABS(left->my - top->my));
338 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
339 int ref, best_ref, ref_score, ref_mx, ref_my;
340
341 assert(sizeof(s->block_state) >= 256);
342 if(s->keyframe){
343 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
344 return 0;
345 }
346
347// clip predictors / edge ?
348
349 P_LEFT[0]= left->mx;
350 P_LEFT[1]= left->my;
351 P_TOP [0]= top->mx;
352 P_TOP [1]= top->my;
353 P_TOPRIGHT[0]= tr->mx;
354 P_TOPRIGHT[1]= tr->my;
355
356 last_mv[0][0]= s->block[index].mx;
357 last_mv[0][1]= s->block[index].my;
358 last_mv[1][0]= right->mx;
359 last_mv[1][1]= right->my;
360 last_mv[2][0]= bottom->mx;
361 last_mv[2][1]= bottom->my;
362
363 s->m.mb_stride=2;
364 s->m.mb_x=
365 s->m.mb_y= 0;
366 c->skip= 0;
367
368 assert(c-> stride == stride);
369 assert(c->uvstride == uvstride);
370
371 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
372 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
373 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
374 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
375
376 c->xmin = - x*block_w - 16+3;
377 c->ymin = - y*block_w - 16+3;
378 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
379 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
380
381 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
382 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
383 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
384 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
385 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
386 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
387 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
388
389 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
390 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
391
392 if (!y) {
393 c->pred_x= P_LEFT[0];
394 c->pred_y= P_LEFT[1];
395 } else {
396 c->pred_x = P_MEDIAN[0];
397 c->pred_y = P_MEDIAN[1];
398 }
399
400 score= INT_MAX;
401 best_ref= 0;
402 for(ref=0; ref<s->ref_frames; ref++){
403 init_ref(c, current_data, s->last_picture[ref].data, NULL, block_w*x, block_w*y, 0);
404
405 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
406 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
407
408 assert(ref_mx >= c->xmin);
409 assert(ref_mx <= c->xmax);
410 assert(ref_my >= c->ymin);
411 assert(ref_my <= c->ymax);
412
413 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
414 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
415 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
416 if(s->ref_mvs[ref]){
417 s->ref_mvs[ref][index][0]= ref_mx;
418 s->ref_mvs[ref][index][1]= ref_my;
419 s->ref_scores[ref][index]= ref_score;
420 }
421 if(score > ref_score){
422 score= ref_score;
423 best_ref= ref;
424 mx= ref_mx;
425 my= ref_my;
426 }
427 }
428 //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
429
430 // subpel search
431 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
432 pc= s->c;
433 pc.bytestream_start=
434 pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
435 memcpy(p_state, s->block_state, sizeof(s->block_state));
436
437 if(level!=s->block_max_depth)
438 put_rac(&pc, &p_state[4 + s_context], 1);
439 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
440 if(s->ref_frames > 1)
441 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
442 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
443 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
444 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
445 p_len= pc.bytestream - pc.bytestream_start;
446 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
447
448 block_s= block_w*block_w;
449 sum = pix_sum(current_data[0], stride, block_w);
450 l= (sum + block_s/2)/block_s;
451 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
452
453 block_s= block_w*block_w>>2;
454 sum = pix_sum(current_data[1], uvstride, block_w>>1);
455 cb= (sum + block_s/2)/block_s;
456// iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
457 sum = pix_sum(current_data[2], uvstride, block_w>>1);
458 cr= (sum + block_s/2)/block_s;
459// iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
460
461 ic= s->c;
462 ic.bytestream_start=
463 ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
464 memcpy(i_state, s->block_state, sizeof(s->block_state));
465 if(level!=s->block_max_depth)
466 put_rac(&ic, &i_state[4 + s_context], 1);
467 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
468 put_symbol(&ic, &i_state[32], l-pl , 1);
469 put_symbol(&ic, &i_state[64], cb-pcb, 1);
470 put_symbol(&ic, &i_state[96], cr-pcr, 1);
471 i_len= ic.bytestream - ic.bytestream_start;
472 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
473
474// assert(score==256*256*256*64-1);
475 assert(iscore < 255*255*256 + s->lambda2*10);
476 assert(iscore >= 0);
477 assert(l>=0 && l<=255);
478 assert(pl>=0 && pl<=255);
479
480 if(level==0){
481 int varc= iscore >> 8;
482 int vard= score >> 8;
483 if (vard <= 64 || vard < varc)
484 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
485 else
486 c->scene_change_score+= s->m.qscale;
487 }
488
489 if(level!=s->block_max_depth){
490 put_rac(&s->c, &s->block_state[4 + s_context], 0);
491 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
492 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
493 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
494 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
495 score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
496
497 if(score2 < score && score2 < iscore)
498 return score2;
499 }
500
501 if(iscore < score){
502 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
503 memcpy(pbbak, i_buffer, i_len);
504 s->c= ic;
505 s->c.bytestream_start= pbbak_start;
506 s->c.bytestream= pbbak + i_len;
507 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
508 memcpy(s->block_state, i_state, sizeof(s->block_state));
509 return iscore;
510 }else{
511 memcpy(pbbak, p_buffer, p_len);
512 s->c= pc;
513 s->c.bytestream_start= pbbak_start;
514 s->c.bytestream= pbbak + p_len;
515 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
516 memcpy(s->block_state, p_state, sizeof(s->block_state));
517 return score;
518 }
519}
520
521static void encode_q_branch2(SnowContext *s, int level, int x, int y){
522 const int w= s->b_width << s->block_max_depth;
523 const int rem_depth= s->block_max_depth - level;
524 const int index= (x + y*w) << rem_depth;
525 int trx= (x+1)<<rem_depth;
526 BlockNode *b= &s->block[index];
527 const BlockNode *left = x ? &s->block[index-1] : &null_block;
528 const BlockNode *top = y ? &s->block[index-w] : &null_block;
529 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
530 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
531 int pl = left->color[0];
532 int pcb= left->color[1];
533 int pcr= left->color[2];
534 int pmx, pmy;
535 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
536 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
537 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
538 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
539
540 if(s->keyframe){
541 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
542 return;
543 }
544
545 if(level!=s->block_max_depth){
546 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
547 put_rac(&s->c, &s->block_state[4 + s_context], 1);
548 }else{
549 put_rac(&s->c, &s->block_state[4 + s_context], 0);
550 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
551 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
552 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
553 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
554 return;
555 }
556 }
557 if(b->type & BLOCK_INTRA){
558 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
559 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
560 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
561 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
562 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
563 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
564 }else{
565 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
566 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
567 if(s->ref_frames > 1)
568 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
569 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
570 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
571 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
572 }
573}
574
575static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
576 int i, x2, y2;
577 Plane *p= &s->plane[plane_index];
578 const int block_size = MB_SIZE >> s->block_max_depth;
579 const int block_w = plane_index ? block_size/2 : block_size;
35e02a3d 580 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+1] : ff_obmc_tab[s->block_max_depth];
7f1b4270
LB
581 const int obmc_stride= plane_index ? block_size : 2*block_size;
582 const int ref_stride= s->current_picture.linesize[plane_index];
583 uint8_t *src= s-> input_picture.data[plane_index];
584 IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
585 const int b_stride = s->b_width << s->block_max_depth;
586 const int w= p->width;
587 const int h= p->height;
588 int index= mb_x + mb_y*b_stride;
589 BlockNode *b= &s->block[index];
590 BlockNode backup= *b;
591 int ab=0;
592 int aa=0;
593
594 b->type|= BLOCK_INTRA;
595 b->color[plane_index]= 0;
596 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
597
598 for(i=0; i<4; i++){
599 int mb_x2= mb_x + (i &1) - 1;
600 int mb_y2= mb_y + (i>>1) - 1;
601 int x= block_w*mb_x2 + block_w/2;
602 int y= block_w*mb_y2 + block_w/2;
603
604 add_yblock(s, 0, NULL, dst + ((i&1)+(i>>1)*obmc_stride)*block_w, NULL, obmc,
605 x, y, block_w, block_w, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
606
607 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_w); y2++){
608 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
609 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_w*mb_y - block_w/2))*obmc_stride;
610 int obmc_v= obmc[index];
611 int d;
612 if(y<0) obmc_v += obmc[index + block_w*obmc_stride];
613 if(x<0) obmc_v += obmc[index + block_w];
614 if(y+block_w>h) obmc_v += obmc[index - block_w*obmc_stride];
615 if(x+block_w>w) obmc_v += obmc[index - block_w];
616 //FIXME precalculate this or simplify it somehow else
617
618 d = -dst[index] + (1<<(FRAC_BITS-1));
619 dst[index] = d;
620 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
621 aa += obmc_v * obmc_v; //FIXME precalculate this
622 }
623 }
624 }
625 *b= backup;
626
627 return av_clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255); //FIXME we should not need clipping
628}
629
630static inline int get_block_bits(SnowContext *s, int x, int y, int w){
631 const int b_stride = s->b_width << s->block_max_depth;
632 const int b_height = s->b_height<< s->block_max_depth;
633 int index= x + y*b_stride;
634 const BlockNode *b = &s->block[index];
635 const BlockNode *left = x ? &s->block[index-1] : &null_block;
636 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
637 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
638 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
639 int dmx, dmy;
640// int mx_context= av_log2(2*FFABS(left->mx - top->mx));
641// int my_context= av_log2(2*FFABS(left->my - top->my));
642
643 if(x<0 || x>=b_stride || y>=b_height)
644 return 0;
645/*
6461 0 0
64701X 1-2 1
648001XX 3-6 2-3
6490001XXX 7-14 4-7
65000001XXXX 15-30 8-15
651*/
652//FIXME try accurate rate
653//FIXME intra and inter predictors if surrounding blocks are not the same type
654 if(b->type & BLOCK_INTRA){
655 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
656 + av_log2(2*FFABS(left->color[1] - b->color[1]))
657 + av_log2(2*FFABS(left->color[2] - b->color[2])));
658 }else{
659 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
660 dmx-= b->mx;
661 dmy-= b->my;
662 return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
663 + av_log2(2*FFABS(dmy))
664 + av_log2(2*b->ref));
665 }
666}
667
33bb63cb 668static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){
7f1b4270
LB
669 Plane *p= &s->plane[plane_index];
670 const int block_size = MB_SIZE >> s->block_max_depth;
671 const int block_w = plane_index ? block_size/2 : block_size;
672 const int obmc_stride= plane_index ? block_size : 2*block_size;
673 const int ref_stride= s->current_picture.linesize[plane_index];
674 uint8_t *dst= s->current_picture.data[plane_index];
675 uint8_t *src= s-> input_picture.data[plane_index];
676 IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
677 uint8_t *cur = s->scratchbuf;
33895451 678 uint8_t *tmp = s->emu_edge_buffer;
7f1b4270
LB
679 const int b_stride = s->b_width << s->block_max_depth;
680 const int b_height = s->b_height<< s->block_max_depth;
681 const int w= p->width;
682 const int h= p->height;
683 int distortion;
684 int rate= 0;
685 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
686 int sx= block_w*mb_x - block_w/2;
687 int sy= block_w*mb_y - block_w/2;
688 int x0= FFMAX(0,-sx);
689 int y0= FFMAX(0,-sy);
690 int x1= FFMIN(block_w*2, w-sx);
691 int y1= FFMIN(block_w*2, h-sy);
692 int i,x,y;
693
694 ff_snow_pred_block(s, cur, tmp, ref_stride, sx, sy, block_w*2, block_w*2, &s->block[mb_x + mb_y*b_stride], plane_index, w, h);
695
696 for(y=y0; y<y1; y++){
33bb63cb 697 const uint8_t *obmc1= obmc_edged[y];
7f1b4270
LB
698 const IDWTELEM *pred1 = pred + y*obmc_stride;
699 uint8_t *cur1 = cur + y*ref_stride;
700 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
701 for(x=x0; x<x1; x++){
702#if FRAC_BITS >= LOG2_OBMC_MAX
703 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
704#else
705 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
706#endif
707 v = (v + pred1[x]) >> FRAC_BITS;
708 if(v&(~255)) v= ~(v>>31);
709 dst1[x] = v;
710 }
711 }
712
713 /* copy the regions where obmc[] = (uint8_t)256 */
714 if(LOG2_OBMC_MAX == 8
715 && (mb_x == 0 || mb_x == b_stride-1)
716 && (mb_y == 0 || mb_y == b_height-1)){
717 if(mb_x == 0)
718 x1 = block_w;
719 else
720 x0 = block_w;
721 if(mb_y == 0)
722 y1 = block_w;
723 else
724 y0 = block_w;
725 for(y=y0; y<y1; y++)
726 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
727 }
728
729 if(block_w==16){
730 /* FIXME rearrange dsputil to fit 32x32 cmp functions */
731 /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
732 /* FIXME cmps overlap but do not cover the wavelet's whole support.
733 * So improving the score of one block is not strictly guaranteed
734 * to improve the score of the whole frame, thus iterative motion
735 * estimation does not always converge. */
736 if(s->avctx->me_cmp == FF_CMP_W97)
737 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
738 else if(s->avctx->me_cmp == FF_CMP_W53)
739 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
740 else{
741 distortion = 0;
742 for(i=0; i<4; i++){
743 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
744 distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
745 }
746 }
747 }else{
748 assert(block_w==8);
749 distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
750 }
751
752 if(plane_index==0){
753 for(i=0; i<4; i++){
754/* ..RRr
755 * .RXx.
756 * rxx..
757 */
758 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
759 }
760 if(mb_x == b_stride-2)
761 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
762 }
763 return distortion + rate*penalty_factor;
764}
765
766static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
767 int i, y2;
768 Plane *p= &s->plane[plane_index];
769 const int block_size = MB_SIZE >> s->block_max_depth;
770 const int block_w = plane_index ? block_size/2 : block_size;
35e02a3d 771 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+1] : ff_obmc_tab[s->block_max_depth];
7f1b4270
LB
772 const int obmc_stride= plane_index ? block_size : 2*block_size;
773 const int ref_stride= s->current_picture.linesize[plane_index];
774 uint8_t *dst= s->current_picture.data[plane_index];
775 uint8_t *src= s-> input_picture.data[plane_index];
776 //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
777 // const has only been removed from zero_dst to suppress a warning
778 static IDWTELEM zero_dst[4096]; //FIXME
779 const int b_stride = s->b_width << s->block_max_depth;
780 const int w= p->width;
781 const int h= p->height;
782 int distortion= 0;
783 int rate= 0;
784 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
785
786 for(i=0; i<9; i++){
787 int mb_x2= mb_x + (i%3) - 1;
788 int mb_y2= mb_y + (i/3) - 1;
789 int x= block_w*mb_x2 + block_w/2;
790 int y= block_w*mb_y2 + block_w/2;
791
792 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
793 x, y, block_w, block_w, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
794
795 //FIXME find a cleaner/simpler way to skip the outside stuff
796 for(y2= y; y2<0; y2++)
797 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
798 for(y2= h; y2<y+block_w; y2++)
799 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
800 if(x<0){
801 for(y2= y; y2<y+block_w; y2++)
802 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
803 }
804 if(x+block_w > w){
805 for(y2= y; y2<y+block_w; y2++)
806 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
807 }
808
809 assert(block_w== 8 || block_w==16);
810 distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_w);
811 }
812
813 if(plane_index==0){
814 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
815 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
816
817/* ..RRRr
818 * .RXXx.
819 * .RXXx.
820 * rxxx.
821 */
822 if(merged)
823 rate = get_block_bits(s, mb_x, mb_y, 2);
824 for(i=merged?4:0; i<9; i++){
825 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
826 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
827 }
828 }
829 return distortion + rate*penalty_factor;
830}
831
832static int encode_subband_c0run(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
833 const int w= b->width;
834 const int h= b->height;
835 int x, y;
836
837 if(1){
838 int run=0;
cbd9b2f9 839 int *runs = s->run_buffer;
7f1b4270
LB
840 int run_index=0;
841 int max_index;
842
843 for(y=0; y<h; y++){
844 for(x=0; x<w; x++){
845 int v, p=0;
846 int /*ll=0, */l=0, lt=0, t=0, rt=0;
847 v= src[x + y*stride];
848
849 if(y){
850 t= src[x + (y-1)*stride];
851 if(x){
852 lt= src[x - 1 + (y-1)*stride];
853 }
854 if(x + 1 < w){
855 rt= src[x + 1 + (y-1)*stride];
856 }
857 }
858 if(x){
859 l= src[x - 1 + y*stride];
860 /*if(x > 1){
861 if(orientation==1) ll= src[y + (x-2)*stride];
862 else ll= src[x - 2 + y*stride];
863 }*/
864 }
865 if(parent){
866 int px= x>>1;
867 int py= y>>1;
868 if(px<b->parent->width && py<b->parent->height)
869 p= parent[px + py*2*stride];
870 }
871 if(!(/*ll|*/l|lt|t|rt|p)){
872 if(v){
873 runs[run_index++]= run;
874 run=0;
875 }else{
876 run++;
877 }
878 }
879 }
880 }
881 max_index= run_index;
882 runs[run_index++]= run;
883 run_index=0;
884 run= runs[run_index++];
885
886 put_symbol2(&s->c, b->state[30], max_index, 0);
887 if(run_index <= max_index)
888 put_symbol2(&s->c, b->state[1], run, 3);
889
890 for(y=0; y<h; y++){
891 if(s->c.bytestream_end - s->c.bytestream < w*40){
892 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
893 return -1;
894 }
895 for(x=0; x<w; x++){
896 int v, p=0;
897 int /*ll=0, */l=0, lt=0, t=0, rt=0;
898 v= src[x + y*stride];
899
900 if(y){
901 t= src[x + (y-1)*stride];
902 if(x){
903 lt= src[x - 1 + (y-1)*stride];
904 }
905 if(x + 1 < w){
906 rt= src[x + 1 + (y-1)*stride];
907 }
908 }
909 if(x){
910 l= src[x - 1 + y*stride];
911 /*if(x > 1){
912 if(orientation==1) ll= src[y + (x-2)*stride];
913 else ll= src[x - 2 + y*stride];
914 }*/
915 }
916 if(parent){
917 int px= x>>1;
918 int py= y>>1;
919 if(px<b->parent->width && py<b->parent->height)
920 p= parent[px + py*2*stride];
921 }
922 if(/*ll|*/l|lt|t|rt|p){
923 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
924
925 put_rac(&s->c, &b->state[0][context], !!v);
926 }else{
927 if(!run){
928 run= runs[run_index++];
929
930 if(run_index <= max_index)
931 put_symbol2(&s->c, b->state[1], run, 3);
932 assert(v);
933 }else{
934 run--;
935 assert(!v);
936 }
937 }
938 if(v){
939 int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
940 int l2= 2*FFABS(l) + (l<0);
941 int t2= 2*FFABS(t) + (t<0);
942
943 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
35e02a3d 944 put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
7f1b4270
LB
945 }
946 }
947 }
948 }
949 return 0;
950}
951
952static int encode_subband(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
953// encode_subband_qtree(s, b, src, parent, stride, orientation);
954// encode_subband_z0run(s, b, src, parent, stride, orientation);
955 return encode_subband_c0run(s, b, src, parent, stride, orientation);
956// encode_subband_dzr(s, b, src, parent, stride, orientation);
957}
958
33bb63cb 959static 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){
7f1b4270
LB
960 const int b_stride= s->b_width << s->block_max_depth;
961 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
962 BlockNode backup= *block;
8540dcfd
MR
963 unsigned value;
964 int rd, index;
7f1b4270
LB
965
966 assert(mb_x>=0 && mb_y>=0);
967 assert(mb_x<b_stride);
968
969 if(intra){
970 block->color[0] = p[0];
971 block->color[1] = p[1];
972 block->color[2] = p[2];
973 block->type |= BLOCK_INTRA;
974 }else{
975 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
976 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
977 if(s->me_cache[index] == value)
978 return 0;
979 s->me_cache[index]= value;
980
981 block->mx= p[0];
982 block->my= p[1];
983 block->type &= ~BLOCK_INTRA;
984 }
985
986 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
987
988//FIXME chroma
989 if(rd < *best_rd){
990 *best_rd= rd;
991 return 1;
992 }else{
993 *block= backup;
994 return 0;
995 }
996}
997
998/* special case for int[2] args we discard afterwards,
999 * fixes compilation problem with gcc 2.95 */
33bb63cb 1000static 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){
7f1b4270
LB
1001 int p[2] = {p0, p1};
1002 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
1003}
1004
1005static av_always_inline int check_4block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, int ref, int *best_rd){
1006 const int b_stride= s->b_width << s->block_max_depth;
1007 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
c44091a9 1008 BlockNode backup[4];
8540dcfd
MR
1009 unsigned value;
1010 int rd, index;
7f1b4270 1011
c44091a9
RB
1012 /* We don't initialize backup[] during variable declaration, because
1013 * that fails to compile on MSVC: "cannot convert from 'BlockNode' to
1014 * 'int16_t'". */
1015 backup[0] = block[0];
1016 backup[1] = block[1];
1017 backup[2] = block[b_stride];
1018 backup[3] = block[b_stride + 1];
1019
7f1b4270
LB
1020 assert(mb_x>=0 && mb_y>=0);
1021 assert(mb_x<b_stride);
1022 assert(((mb_x|mb_y)&1) == 0);
1023
1024 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
1025 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
1026 if(s->me_cache[index] == value)
1027 return 0;
1028 s->me_cache[index]= value;
1029
1030 block->mx= p0;
1031 block->my= p1;
1032 block->ref= ref;
1033 block->type &= ~BLOCK_INTRA;
1034 block[1]= block[b_stride]= block[b_stride+1]= *block;
1035
1036 rd= get_4block_rd(s, mb_x, mb_y, 0);
1037
1038//FIXME chroma
1039 if(rd < *best_rd){
1040 *best_rd= rd;
1041 return 1;
1042 }else{
1043 block[0]= backup[0];
1044 block[1]= backup[1];
1045 block[b_stride]= backup[2];
1046 block[b_stride+1]= backup[3];
1047 return 0;
1048 }
1049}
1050
1051static void iterative_me(SnowContext *s){
1052 int pass, mb_x, mb_y;
1053 const int b_width = s->b_width << s->block_max_depth;
1054 const int b_height= s->b_height << s->block_max_depth;
1055 const int b_stride= b_width;
1056 int color[3];
1057
1058 {
1059 RangeCoder r = s->c;
1060 uint8_t state[sizeof(s->block_state)];
1061 memcpy(state, s->block_state, sizeof(s->block_state));
1062 for(mb_y= 0; mb_y<s->b_height; mb_y++)
1063 for(mb_x= 0; mb_x<s->b_width; mb_x++)
1064 encode_q_branch(s, 0, mb_x, mb_y);
1065 s->c = r;
1066 memcpy(s->block_state, state, sizeof(s->block_state));
1067 }
1068
1069 for(pass=0; pass<25; pass++){
1070 int change= 0;
1071
1072 for(mb_y= 0; mb_y<b_height; mb_y++){
1073 for(mb_x= 0; mb_x<b_width; mb_x++){
1074 int dia_change, i, j, ref;
1075 int best_rd= INT_MAX, ref_rd;
1076 BlockNode backup, ref_b;
1077 const int index= mb_x + mb_y * b_stride;
1078 BlockNode *block= &s->block[index];
1079 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
1080 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
1081 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
1082 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
1083 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
1084 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
1085 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1086 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1087 const int b_w= (MB_SIZE >> s->block_max_depth);
33bb63cb 1088 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
7f1b4270
LB
1089
1090 if(pass && (block->type & BLOCK_OPT))
1091 continue;
1092 block->type |= BLOCK_OPT;
1093
1094 backup= *block;
1095
1096 if(!s->me_cache_generation)
1097 memset(s->me_cache, 0, sizeof(s->me_cache));
1098 s->me_cache_generation += 1<<22;
1099
1100 //FIXME precalculate
1101 {
1102 int x, y;
33bb63cb
RB
1103 for (y = 0; y < b_w * 2; y++)
1104 memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
7f1b4270
LB
1105 if(mb_x==0)
1106 for(y=0; y<b_w*2; y++)
1107 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1108 if(mb_x==b_stride-1)
1109 for(y=0; y<b_w*2; y++)
1110 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1111 if(mb_y==0){
1112 for(x=0; x<b_w*2; x++)
1113 obmc_edged[0][x] += obmc_edged[b_w-1][x];
1114 for(y=1; y<b_w; y++)
1115 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1116 }
1117 if(mb_y==b_height-1){
1118 for(x=0; x<b_w*2; x++)
1119 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1120 for(y=b_w; y<b_w*2-1; y++)
1121 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1122 }
1123 }
1124
1125 //skip stuff outside the picture
1126 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1127 uint8_t *src= s-> input_picture.data[0];
1128 uint8_t *dst= s->current_picture.data[0];
1129 const int stride= s->current_picture.linesize[0];
1130 const int block_w= MB_SIZE >> s->block_max_depth;
1131 const int sx= block_w*mb_x - block_w/2;
1132 const int sy= block_w*mb_y - block_w/2;
1133 const int w= s->plane[0].width;
1134 const int h= s->plane[0].height;
1135 int y;
1136
1137 for(y=sy; y<0; y++)
1138 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1139 for(y=h; y<sy+block_w*2; y++)
1140 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1141 if(sx<0){
1142 for(y=sy; y<sy+block_w*2; y++)
1143 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1144 }
1145 if(sx+block_w*2 > w){
1146 for(y=sy; y<sy+block_w*2; y++)
1147 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1148 }
1149 }
1150
1151 // intra(black) = neighbors' contribution to the current block
1152 for(i=0; i<3; i++)
1153 color[i]= get_dc(s, mb_x, mb_y, i);
1154
1155 // get previous score (cannot be cached due to OBMC)
1156 if(pass > 0 && (block->type&BLOCK_INTRA)){
1157 int color0[3]= {block->color[0], block->color[1], block->color[2]};
33bb63cb 1158 check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);
7f1b4270 1159 }else
33bb63cb 1160 check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
7f1b4270
LB
1161
1162 ref_b= *block;
1163 ref_rd= best_rd;
1164 for(ref=0; ref < s->ref_frames; ref++){
1165 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1166 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1167 continue;
1168 block->ref= ref;
1169 best_rd= INT_MAX;
1170
33bb63cb
RB
1171 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
1172 check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
7f1b4270 1173 if(tb)
33bb63cb 1174 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
7f1b4270 1175 if(lb)
33bb63cb 1176 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);
7f1b4270 1177 if(rb)
33bb63cb 1178 check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);
7f1b4270 1179 if(bb)
33bb63cb 1180 check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
7f1b4270
LB
1181
1182 /* fullpel ME */
1183 //FIXME avoid subpel interpolation / round to nearest integer
1184 do{
1185 dia_change=0;
1186 for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
1187 for(j=0; j<i; j++){
33bb63cb
RB
1188 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
1189 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1190 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), obmc_edged, &best_rd);
1191 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), obmc_edged, &best_rd);
7f1b4270
LB
1192 }
1193 }
1194 }while(dia_change);
1195 /* subpel ME */
1196 do{
1197 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1198 dia_change=0;
1199 for(i=0; i<8; i++)
33bb63cb 1200 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
7f1b4270
LB
1201 }while(dia_change);
1202 //FIXME or try the standard 2 pass qpel or similar
1203
1204 mvr[0][0]= block->mx;
1205 mvr[0][1]= block->my;
1206 if(ref_rd > best_rd){
1207 ref_rd= best_rd;
1208 ref_b= *block;
1209 }
1210 }
1211 best_rd= ref_rd;
1212 *block= ref_b;
33bb63cb 1213 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);
7f1b4270
LB
1214 //FIXME RD style color selection
1215 if(!same_block(block, &backup)){
1216 if(tb ) tb ->type &= ~BLOCK_OPT;
1217 if(lb ) lb ->type &= ~BLOCK_OPT;
1218 if(rb ) rb ->type &= ~BLOCK_OPT;
1219 if(bb ) bb ->type &= ~BLOCK_OPT;
1220 if(tlb) tlb->type &= ~BLOCK_OPT;
1221 if(trb) trb->type &= ~BLOCK_OPT;
1222 if(blb) blb->type &= ~BLOCK_OPT;
1223 if(brb) brb->type &= ~BLOCK_OPT;
1224 change ++;
1225 }
1226 }
1227 }
1228 av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
1229 if(!change)
1230 break;
1231 }
1232
1233 if(s->block_max_depth == 1){
1234 int change= 0;
1235 for(mb_y= 0; mb_y<b_height; mb_y+=2){
1236 for(mb_x= 0; mb_x<b_width; mb_x+=2){
1237 int i;
1238 int best_rd, init_rd;
1239 const int index= mb_x + mb_y * b_stride;
1240 BlockNode *b[4];
1241
1242 b[0]= &s->block[index];
1243 b[1]= b[0]+1;
1244 b[2]= b[0]+b_stride;
1245 b[3]= b[2]+1;
1246 if(same_block(b[0], b[1]) &&
1247 same_block(b[0], b[2]) &&
1248 same_block(b[0], b[3]))
1249 continue;
1250
1251 if(!s->me_cache_generation)
1252 memset(s->me_cache, 0, sizeof(s->me_cache));
1253 s->me_cache_generation += 1<<22;
1254
1255 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1256
1257 //FIXME more multiref search?
1258 check_4block_inter(s, mb_x, mb_y,
1259 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1260 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1261
1262 for(i=0; i<4; i++)
1263 if(!(b[i]->type&BLOCK_INTRA))
1264 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1265
1266 if(init_rd != best_rd)
1267 change++;
1268 }
1269 }
1270 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1271 }
1272}
1273
1274static void encode_blocks(SnowContext *s, int search){
1275 int x, y;
1276 int w= s->b_width;
1277 int h= s->b_height;
1278
1279 if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
1280 iterative_me(s);
1281
1282 for(y=0; y<h; y++){
1283 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1284 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1285 return;
1286 }
1287 for(x=0; x<w; x++){
1288 if(s->avctx->me_method == ME_ITER || !search)
1289 encode_q_branch2(s, 0, x, y);
1290 else
1291 encode_q_branch (s, 0, x, y);
1292 }
1293 }
1294}
1295
1296static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1297 const int w= b->width;
1298 const int h= b->height;
1299 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
35e02a3d 1300 const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
7f1b4270
LB
1301 int x,y, thres1, thres2;
1302
1303 if(s->qlog == LOSSLESS_QLOG){
1304 for(y=0; y<h; y++)
1305 for(x=0; x<w; x++)
1306 dst[x + y*stride]= src[x + y*stride];
1307 return;
1308 }
1309
1310 bias= bias ? 0 : (3*qmul)>>3;
1311 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1312 thres2= 2*thres1;
1313
1314 if(!bias){
1315 for(y=0; y<h; y++){
1316 for(x=0; x<w; x++){
1317 int i= src[x + y*stride];
1318
1319 if((unsigned)(i+thres1) > thres2){
1320 if(i>=0){
1321 i<<= QEXPSHIFT;
1322 i/= qmul; //FIXME optimize
1323 dst[x + y*stride]= i;
1324 }else{
1325 i= -i;
1326 i<<= QEXPSHIFT;
1327 i/= qmul; //FIXME optimize
1328 dst[x + y*stride]= -i;
1329 }
1330 }else
1331 dst[x + y*stride]= 0;
1332 }
1333 }
1334 }else{
1335 for(y=0; y<h; y++){
1336 for(x=0; x<w; x++){
1337 int i= src[x + y*stride];
1338
1339 if((unsigned)(i+thres1) > thres2){
1340 if(i>=0){
1341 i<<= QEXPSHIFT;
1342 i= (i + bias) / qmul; //FIXME optimize
1343 dst[x + y*stride]= i;
1344 }else{
1345 i= -i;
1346 i<<= QEXPSHIFT;
1347 i= (i + bias) / qmul; //FIXME optimize
1348 dst[x + y*stride]= -i;
1349 }
1350 }else
1351 dst[x + y*stride]= 0;
1352 }
1353 }
1354 }
1355}
1356
1357static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1358 const int w= b->width;
1359 const int h= b->height;
1360 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
35e02a3d 1361 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
7f1b4270
LB
1362 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1363 int x,y;
1364
1365 if(s->qlog == LOSSLESS_QLOG) return;
1366
1367 for(y=0; y<h; y++){
1368 for(x=0; x<w; x++){
1369 int i= src[x + y*stride];
1370 if(i<0){
1371 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1372 }else if(i>0){
1373 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1374 }
1375 }
1376 }
1377}
1378
1379static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1380 const int w= b->width;
1381 const int h= b->height;
1382 int x,y;
1383
1384 for(y=h-1; y>=0; y--){
1385 for(x=w-1; x>=0; x--){
1386 int i= x + y*stride;
1387
1388 if(x){
1389 if(use_median){
1390 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1391 else src[i] -= src[i - 1];
1392 }else{
1393 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1394 else src[i] -= src[i - 1];
1395 }
1396 }else{
1397 if(y) src[i] -= src[i - stride];
1398 }
1399 }
1400 }
1401}
1402
1403static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1404 const int w= b->width;
1405 const int h= b->height;
1406 int x,y;
1407
1408 for(y=0; y<h; y++){
1409 for(x=0; x<w; x++){
1410 int i= x + y*stride;
1411
1412 if(x){
1413 if(use_median){
1414 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1415 else src[i] += src[i - 1];
1416 }else{
1417 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1418 else src[i] += src[i - 1];
1419 }
1420 }else{
1421 if(y) src[i] += src[i - stride];
1422 }
1423 }
1424 }
1425}
1426
1427static void encode_qlogs(SnowContext *s){
1428 int plane_index, level, orientation;
1429
1430 for(plane_index=0; plane_index<2; plane_index++){
1431 for(level=0; level<s->spatial_decomposition_count; level++){
1432 for(orientation=level ? 1:0; orientation<4; orientation++){
1433 if(orientation==2) continue;
1434 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1435 }
1436 }
1437 }
1438}
1439
1440static void encode_header(SnowContext *s){
1441 int plane_index, i;
1442 uint8_t kstate[32];
1443
1444 memset(kstate, MID_STATE, sizeof(kstate));
1445
1446 put_rac(&s->c, kstate, s->keyframe);
1447 if(s->keyframe || s->always_reset){
1448 ff_snow_reset_contexts(s);
1449 s->last_spatial_decomposition_type=
1450 s->last_qlog=
1451 s->last_qbias=
1452 s->last_mv_scale=
1453 s->last_block_max_depth= 0;
1454 for(plane_index=0; plane_index<2; plane_index++){
1455 Plane *p= &s->plane[plane_index];
1456 p->last_htaps=0;
1457 p->last_diag_mc=0;
1458 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1459 }
1460 }
1461 if(s->keyframe){
1462 put_symbol(&s->c, s->header_state, s->version, 0);
1463 put_rac(&s->c, s->header_state, s->always_reset);
1464 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1465 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1466 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1467 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1468 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1469 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1470 put_rac(&s->c, s->header_state, s->spatial_scalability);
1471// put_rac(&s->c, s->header_state, s->rate_scalability);
1472 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1473
1474 encode_qlogs(s);
1475 }
1476
1477 if(!s->keyframe){
1478 int update_mc=0;
1479 for(plane_index=0; plane_index<2; plane_index++){
1480 Plane *p= &s->plane[plane_index];
1481 update_mc |= p->last_htaps != p->htaps;
1482 update_mc |= p->last_diag_mc != p->diag_mc;
1483 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1484 }
1485 put_rac(&s->c, s->header_state, update_mc);
1486 if(update_mc){
1487 for(plane_index=0; plane_index<2; plane_index++){
1488 Plane *p= &s->plane[plane_index];
1489 put_rac(&s->c, s->header_state, p->diag_mc);
1490 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1491 for(i= p->htaps/2; i; i--)
1492 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1493 }
1494 }
1495 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1496 put_rac(&s->c, s->header_state, 1);
1497 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1498 encode_qlogs(s);
1499 }else
1500 put_rac(&s->c, s->header_state, 0);
1501 }
1502
1503 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1504 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
1505 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
1506 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
1507 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1508
1509}
1510
1511static void update_last_header_values(SnowContext *s){
1512 int plane_index;
1513
1514 if(!s->keyframe){
1515 for(plane_index=0; plane_index<2; plane_index++){
1516 Plane *p= &s->plane[plane_index];
1517 p->last_diag_mc= p->diag_mc;
1518 p->last_htaps = p->htaps;
1519 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1520 }
1521 }
1522
1523 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
1524 s->last_qlog = s->qlog;
1525 s->last_qbias = s->qbias;
1526 s->last_mv_scale = s->mv_scale;
1527 s->last_block_max_depth = s->block_max_depth;
1528 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1529}
1530
1531static int qscale2qlog(int qscale){
1532 return rint(QROOT*log(qscale / (float)FF_QP2LAMBDA)/log(2))
1533 + 61*QROOT/8; ///< 64 > 60
1534}
1535
1536static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1537{
1538 /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1539 * FIXME we know exact mv bits at this point,
1540 * but ratecontrol isn't set up to include them. */
1541 uint32_t coef_sum= 0;
1542 int level, orientation, delta_qlog;
1543
1544 for(level=0; level<s->spatial_decomposition_count; level++){
1545 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1546 SubBand *b= &s->plane[0].band[level][orientation];
1547 IDWTELEM *buf= b->ibuf;
1548 const int w= b->width;
1549 const int h= b->height;
1550 const int stride= b->stride;
1551 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
35e02a3d 1552 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
7f1b4270
LB
1553 const int qdiv= (1<<16)/qmul;
1554 int x, y;
1555 //FIXME this is ugly
1556 for(y=0; y<h; y++)
1557 for(x=0; x<w; x++)
1558 buf[x+y*stride]= b->buf[x+y*stride];
1559 if(orientation==0)
1560 decorrelate(s, b, buf, stride, 1, 0);
1561 for(y=0; y<h; y++)
1562 for(x=0; x<w; x++)
1563 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1564 }
1565 }
1566
1567 /* ugly, ratecontrol just takes a sqrt again */
1568 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1569 assert(coef_sum < INT_MAX);
1570
1571 if(pict->pict_type == AV_PICTURE_TYPE_I){
1572 s->m.current_picture.mb_var_sum= coef_sum;
1573 s->m.current_picture.mc_mb_var_sum= 0;
1574 }else{
1575 s->m.current_picture.mc_mb_var_sum= coef_sum;
1576 s->m.current_picture.mb_var_sum= 0;
1577 }
1578
1579 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1580 if (pict->quality < 0)
1581 return INT_MIN;
1582 s->lambda= pict->quality * 3/2;
1583 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1584 s->qlog+= delta_qlog;
1585 return delta_qlog;
1586}
1587
1588static void calculate_visual_weight(SnowContext *s, Plane *p){
1589 int width = p->width;
1590 int height= p->height;
1591 int level, orientation, x, y;
1592
1593 for(level=0; level<s->spatial_decomposition_count; level++){
1594 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1595 SubBand *b= &p->band[level][orientation];
1596 IDWTELEM *ibuf= b->ibuf;
1597 int64_t error=0;
1598
1599 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1600 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
d9669eab 1601 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
7f1b4270
LB
1602 for(y=0; y<height; y++){
1603 for(x=0; x<width; x++){
1604 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1605 error += d*d;
1606 }
1607 }
1608
1609 b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
1610 }
1611 }
1612}
1613
171273fe
AK
1614static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1615 const AVFrame *pict, int *got_packet)
1616{
7f1b4270
LB
1617 SnowContext *s = avctx->priv_data;
1618 RangeCoder * const c= &s->c;
8d3348c2 1619 AVFrame *pic = &s->new_picture;
7f1b4270
LB
1620 const int width= s->avctx->width;
1621 const int height= s->avctx->height;
171273fe 1622 int level, orientation, plane_index, i, y, ret;
7f1b4270
LB
1623 uint8_t rc_header_bak[sizeof(s->header_state)];
1624 uint8_t rc_block_bak[sizeof(s->block_state)];
1625
171273fe
AK
1626 if (!pkt->data &&
1627 (ret = av_new_packet(pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + FF_MIN_BUFFER_SIZE)) < 0) {
1628 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
1629 return ret;
1630 }
1631
1632 ff_init_range_encoder(c, pkt->data, pkt->size);
7f1b4270
LB
1633 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1634
1635 for(i=0; i<3; i++){
1636 int shift= !!i;
1637 for(y=0; y<(height>>shift); y++)
1638 memcpy(&s->input_picture.data[i][y * s->input_picture.linesize[i]],
1639 &pict->data[i][y * pict->linesize[i]],
1640 width>>shift);
1641 }
1642 s->new_picture = *pict;
1643
1644 s->m.picture_number= avctx->frame_number;
1645 if(avctx->flags&CODEC_FLAG_PASS2){
8d3348c2
AK
1646 s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1647 s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
7f1b4270 1648 if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
8d3348c2
AK
1649 pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1650 if (pic->quality < 0)
7f1b4270
LB
1651 return -1;
1652 }
1653 }else{
1654 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
8d3348c2 1655 s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
7f1b4270
LB
1656 }
1657
1658 if(s->pass1_rc && avctx->frame_number == 0)
8d3348c2
AK
1659 pic->quality = 2*FF_QP2LAMBDA;
1660 if (pic->quality) {
1661 s->qlog = qscale2qlog(pic->quality);
1662 s->lambda = pic->quality * 3/2;
7f1b4270 1663 }
8d3348c2 1664 if (s->qlog < 0 || (!pic->quality && (avctx->flags & CODEC_FLAG_QSCALE))) {
7f1b4270
LB
1665 s->qlog= LOSSLESS_QLOG;
1666 s->lambda = 0;
1667 }//else keep previous frame's qlog until after motion estimation
1668
1669 ff_snow_frame_start(s);
1670
1671 s->m.current_picture_ptr= &s->m.current_picture;
1672 s->m.last_picture.f.pts = s->m.current_picture.f.pts;
1673 s->m.current_picture.f.pts = pict->pts;
8d3348c2 1674 if(pic->pict_type == AV_PICTURE_TYPE_P){
7f1b4270
LB
1675 int block_width = (width +15)>>4;
1676 int block_height= (height+15)>>4;
1677 int stride= s->current_picture.linesize[0];
1678
1679 assert(s->current_picture.data[0]);
1680 assert(s->last_picture[0].data[0]);
1681
1682 s->m.avctx= s->avctx;
1683 s->m.current_picture.f.data[0] = s->current_picture.data[0];
1684 s->m. last_picture.f.data[0] = s->last_picture[0].data[0];
1685 s->m. new_picture.f.data[0] = s-> input_picture.data[0];
1686 s->m. last_picture_ptr= &s->m. last_picture;
1687 s->m.linesize=
1688 s->m. last_picture.f.linesize[0] =
1689 s->m. new_picture.f.linesize[0] =
1690 s->m.current_picture.f.linesize[0] = stride;
1691 s->m.uvlinesize= s->current_picture.linesize[1];
1692 s->m.width = width;
1693 s->m.height= height;
1694 s->m.mb_width = block_width;
1695 s->m.mb_height= block_height;
1696 s->m.mb_stride= s->m.mb_width+1;
1697 s->m.b8_stride= 2*s->m.mb_width+1;
1698 s->m.f_code=1;
8d3348c2 1699 s->m.pict_type = pic->pict_type;
7f1b4270
LB
1700 s->m.me_method= s->avctx->me_method;
1701 s->m.me.scene_change_score=0;
1702 s->m.flags= s->avctx->flags;
1703 s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
1704 s->m.out_format= FMT_H263;
1705 s->m.unrestricted_mv= 1;
1706
1707 s->m.lambda = s->lambda;
1708 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1709 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1710
1711 s->m.dsp= s->dsp; //move
1712 ff_init_me(&s->m);
1713 s->dsp= s->m.dsp;
1714 }
1715
1716 if(s->pass1_rc){
1717 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1718 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1719 }
1720
1721redo_frame:
1722
8d3348c2 1723 if (pic->pict_type == AV_PICTURE_TYPE_I)
7f1b4270
LB
1724 s->spatial_decomposition_count= 5;
1725 else
1726 s->spatial_decomposition_count= 5;
1727
8d3348c2
AK
1728 s->m.pict_type = pic->pict_type;
1729 s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
7f1b4270
LB
1730
1731 ff_snow_common_init_after_header(avctx);
1732
1733 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1734 for(plane_index=0; plane_index<3; plane_index++){
1735 calculate_visual_weight(s, &s->plane[plane_index]);
1736 }
1737 }
1738
1739 encode_header(s);
1740 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1741 encode_blocks(s, 1);
1742 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1743
1744 for(plane_index=0; plane_index<3; plane_index++){
1745 Plane *p= &s->plane[plane_index];
1746 int w= p->width;
1747 int h= p->height;
1748 int x, y;
1749// int bits= put_bits_count(&s->c.pb);
1750
1751 if (!s->memc_only) {
1752 //FIXME optimize
1753 if(pict->data[plane_index]) //FIXME gray hack
1754 for(y=0; y<h; y++){
1755 for(x=0; x<w; x++){
1756 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1757 }
1758 }
1759 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1760
1761 if( plane_index==0
8d3348c2 1762 && pic->pict_type == AV_PICTURE_TYPE_P
7f1b4270
LB
1763 && !(avctx->flags&CODEC_FLAG_PASS2)
1764 && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
171273fe 1765 ff_init_range_encoder(c, pkt->data, pkt->size);
7f1b4270 1766 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
8d3348c2 1767 pic->pict_type= AV_PICTURE_TYPE_I;
7f1b4270
LB
1768 s->keyframe=1;
1769 s->current_picture.key_frame=1;
1770 goto redo_frame;
1771 }
1772
1773 if(s->qlog == LOSSLESS_QLOG){
1774 for(y=0; y<h; y++){
1775 for(x=0; x<w; x++){
1776 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1777 }
1778 }
1779 }else{
1780 for(y=0; y<h; y++){
1781 for(x=0; x<w; x++){
1782 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1783 }
1784 }
1785 }
1786
1787 /* if(QUANTIZE2)
1788 dwt_quantize(s, p, s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type);
1789 else*/
d9669eab 1790 ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
7f1b4270
LB
1791
1792 if(s->pass1_rc && plane_index==0){
8d3348c2 1793 int delta_qlog = ratecontrol_1pass(s, pic);
7f1b4270
LB
1794 if (delta_qlog <= INT_MIN)
1795 return -1;
1796 if(delta_qlog){
1797 //reordering qlog in the bitstream would eliminate this reset
171273fe 1798 ff_init_range_encoder(c, pkt->data, pkt->size);
7f1b4270
LB
1799 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
1800 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
1801 encode_header(s);
1802 encode_blocks(s, 0);
1803 }
1804 }
1805
1806 for(level=0; level<s->spatial_decomposition_count; level++){
1807 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1808 SubBand *b= &p->band[level][orientation];
1809
1810 if(!QUANTIZE2)
1811 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1812 if(orientation==0)
8d3348c2 1813 decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
7f1b4270
LB
1814 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1815 assert(b->parent==NULL || b->parent->stride == b->stride*2);
1816 if(orientation==0)
1817 correlate(s, b, b->ibuf, b->stride, 1, 0);
1818 }
1819 }
1820
1821 for(level=0; level<s->spatial_decomposition_count; level++){
1822 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1823 SubBand *b= &p->band[level][orientation];
1824
1825 dequantize(s, b, b->ibuf, b->stride);
1826 }
1827 }
1828
d9669eab 1829 ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
7f1b4270
LB
1830 if(s->qlog == LOSSLESS_QLOG){
1831 for(y=0; y<h; y++){
1832 for(x=0; x<w; x++){
1833 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1834 }
1835 }
1836 }
1837 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1838 }else{
1839 //ME/MC only
8d3348c2 1840 if(pic->pict_type == AV_PICTURE_TYPE_I){
7f1b4270
LB
1841 for(y=0; y<h; y++){
1842 for(x=0; x<w; x++){
1843 s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x]=
1844 pict->data[plane_index][y*pict->linesize[plane_index] + x];
1845 }
1846 }
1847 }else{
1848 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1849 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1850 }
1851 }
1852 if(s->avctx->flags&CODEC_FLAG_PSNR){
1853 int64_t error= 0;
1854
1855 if(pict->data[plane_index]) //FIXME gray hack
1856 for(y=0; y<h; y++){
1857 for(x=0; x<w; x++){
1858 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];
1859 error += d*d;
1860 }
1861 }
1862 s->avctx->error[plane_index] += error;
1863 s->current_picture.error[plane_index] = error;
1864 }
1865
1866 }
1867
1868 update_last_header_values(s);
1869
1870 ff_snow_release_buffer(avctx);
1871
1872 s->current_picture.coded_picture_number = avctx->frame_number;
1873 s->current_picture.pict_type = pict->pict_type;
1874 s->current_picture.quality = pict->quality;
1875 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1876 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1877 s->m.current_picture.f.display_picture_number =
1878 s->m.current_picture.f.coded_picture_number = avctx->frame_number;
8d3348c2 1879 s->m.current_picture.f.quality = pic->quality;
7f1b4270
LB
1880 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1881 if(s->pass1_rc)
1882 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1883 return -1;
1884 if(avctx->flags&CODEC_FLAG_PASS1)
1885 ff_write_pass1_stats(&s->m);
1886 s->m.last_pict_type = s->m.pict_type;
1887 avctx->frame_bits = s->m.frame_bits;
1888 avctx->mv_bits = s->m.mv_bits;
1889 avctx->misc_bits = s->m.misc_bits;
1890 avctx->p_tex_bits = s->m.p_tex_bits;
1891
1892 emms_c();
1893
171273fe
AK
1894 pkt->size = ff_rac_terminate(c);
1895 if (avctx->coded_frame->key_frame)
1896 pkt->flags |= AV_PKT_FLAG_KEY;
1897 *got_packet = 1;
1898
1899 return 0;
7f1b4270
LB
1900}
1901
1902static av_cold int encode_end(AVCodecContext *avctx)
1903{
1904 SnowContext *s = avctx->priv_data;
1905
1906 ff_snow_common_end(s);
1907 if (s->input_picture.data[0])
1908 avctx->release_buffer(avctx, &s->input_picture);
1909 av_free(avctx->stats_out);
1910
1911 return 0;
1912}
1913
1914#define OFFSET(x) offsetof(SnowContext, x)
1915#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1916static const AVOption options[] = {
1917 { "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
1918 { NULL },
1919};
1920
1921static const AVClass snowenc_class = {
1922 .class_name = "snow encoder",
1923 .item_name = av_default_item_name,
1924 .option = options,
1925 .version = LIBAVUTIL_VERSION_INT,
1926};
1927
1928AVCodec ff_snow_encoder = {
1929 .name = "snow",
1930 .type = AVMEDIA_TYPE_VIDEO,
1931 .id = CODEC_ID_SNOW,
1932 .priv_data_size = sizeof(SnowContext),
1933 .init = encode_init,
171273fe 1934 .encode2 = encode_frame,
7f1b4270 1935 .close = encode_end,
00c3b67b 1936 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
7f1b4270
LB
1937 .priv_class = &snowenc_class,
1938};