git.sesse.net Git - ffmpeg/blob - libavcodec/snowenc.c

   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 static av_cold int encode_init(AVCodecContext *avctx)
  37 {
  38     SnowContext *s = avctx->priv_data;
  39     int plane_index, ret;
  40     int i;
  41
  42 #if FF_API_PRIVATE_OPT
  43 FF_DISABLE_DEPRECATION_WARNINGS
  44     if (avctx->prediction_method)
  45         s->pred = avctx->prediction_method;
  46 FF_ENABLE_DEPRECATION_WARNINGS
  47 #endif
  48
  49     if(s->pred == DWT_97
  50        && (avctx->flags & AV_CODEC_FLAG_QSCALE)
  51        && avctx->global_quality == 0){
  52         av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
  53         return AVERROR(EINVAL);
  54     }
  55 #if FF_API_MOTION_EST
  56 FF_DISABLE_DEPRECATION_WARNINGS
  57     if (avctx->me_method == ME_ITER)
  58         s->motion_est = FF_ME_ITER;
  59 FF_ENABLE_DEPRECATION_WARNINGS
  60 #endif
  61
  62     s->spatial_decomposition_type= s->pred; //FIXME add decorrelator type r transform_type
  63
  64     s->mv_scale       = (avctx->flags & AV_CODEC_FLAG_QPEL) ? 2 : 4;
  65     s->block_max_depth= (avctx->flags & AV_CODEC_FLAG_4MV ) ? 1 : 0;
  66
  67     for(plane_index=0; plane_index<3; plane_index++){
  68         s->plane[plane_index].diag_mc= 1;
  69         s->plane[plane_index].htaps= 6;
  70         s->plane[plane_index].hcoeff[0]=  40;
  71         s->plane[plane_index].hcoeff[1]= -10;
  72         s->plane[plane_index].hcoeff[2]=   2;
  73         s->plane[plane_index].fast_mc= 1;
  74     }
  75
  76     if ((ret = ff_snow_common_init(avctx)) < 0) {
  77         return ret;
  78     }
  79     ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
  80
  81     ff_snow_alloc_blocks(s);
  82
  83     s->version=0;
  84
  85     s->m.avctx   = avctx;
  86     s->m.bit_rate= avctx->bit_rate;
  87     s->m.lmin    = avctx->mb_lmin;
  88     s->m.lmax    = avctx->mb_lmax;
  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         ret = ff_rate_control_init(&s->m);
 111         if(ret < 0)
 112             return ret;
 113     }
 114     s->pass1_rc= !(avctx->flags & (AV_CODEC_FLAG_QSCALE|AV_CODEC_FLAG_PASS2));
 115
 116     switch(avctx->pix_fmt){
 117     case AV_PIX_FMT_YUV444P:
 118 //    case AV_PIX_FMT_YUV422P:
 119     case AV_PIX_FMT_YUV420P:
 120 //    case AV_PIX_FMT_YUV411P:
 121     case AV_PIX_FMT_YUV410P:
 122         s->nb_planes = 3;
 123         s->colorspace_type= 0;
 124         break;
 125     case AV_PIX_FMT_GRAY8:
 126         s->nb_planes = 1;
 127         s->colorspace_type = 1;
 128         break;
 129 /*    case AV_PIX_FMT_RGB32:
 130         s->colorspace= 1;
 131         break;*/
 132     default:
 133         av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
 134         return AVERROR_PATCHWELCOME;
 135     }
 136     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
 137
 138     ff_set_cmp(&s->mecc, s->mecc.me_cmp, s->avctx->me_cmp);
 139     ff_set_cmp(&s->mecc, s->mecc.me_sub_cmp, s->avctx->me_sub_cmp);
 140
 141     s->input_picture = av_frame_alloc();
 142     if (!s->input_picture)
 143         return AVERROR(ENOMEM);
 144
 145     if ((ret = ff_snow_get_buffer(s, s->input_picture)) < 0)
 146         return ret;
 147
 148     if(s->motion_est == FF_ME_ITER){
 149         int size= s->b_width * s->b_height << 2*s->block_max_depth;
 150         for(i=0; i<s->max_ref_frames; i++){
 151             s->ref_mvs[i]= av_mallocz_array(size, sizeof(int16_t[2]));
 152             s->ref_scores[i]= av_mallocz_array(size, sizeof(uint32_t));
 153             if (!s->ref_mvs[i] || !s->ref_scores[i])
 154                 return AVERROR(ENOMEM);
 155         }
 156     }
 157
 158     return 0;
 159 }
 160
 161 //near copy & paste from dsputil, FIXME
 162 static int pix_sum(uint8_t * pix, int line_size, int w, int h)
 163 {
 164     int s, i, j;
 165
 166     s = 0;
 167     for (i = 0; i < h; i++) {
 168         for (j = 0; j < w; j++) {
 169             s += pix[0];
 170             pix ++;
 171         }
 172         pix += line_size - w;
 173     }
 174     return s;
 175 }
 176
 177 //near copy & paste from dsputil, FIXME
 178 static int pix_norm1(uint8_t * pix, int line_size, int w)
 179 {
 180     int s, i, j;
 181     uint32_t *sq = ff_square_tab + 256;
 182
 183     s = 0;
 184     for (i = 0; i < w; i++) {
 185         for (j = 0; j < w; j ++) {
 186             s += sq[pix[0]];
 187             pix ++;
 188         }
 189         pix += line_size - w;
 190     }
 191     return s;
 192 }
 193
 194 static inline int get_penalty_factor(int lambda, int lambda2, int type){
 195     switch(type&0xFF){
 196     default:
 197     case FF_CMP_SAD:
 198         return lambda>>FF_LAMBDA_SHIFT;
 199     case FF_CMP_DCT:
 200         return (3*lambda)>>(FF_LAMBDA_SHIFT+1);
 201     case FF_CMP_W53:
 202         return (4*lambda)>>(FF_LAMBDA_SHIFT);
 203     case FF_CMP_W97:
 204         return (2*lambda)>>(FF_LAMBDA_SHIFT);
 205     case FF_CMP_SATD:
 206     case FF_CMP_DCT264:
 207         return (2*lambda)>>FF_LAMBDA_SHIFT;
 208     case FF_CMP_RD:
 209     case FF_CMP_PSNR:
 210     case FF_CMP_SSE:
 211     case FF_CMP_NSSE:
 212         return lambda2>>FF_LAMBDA_SHIFT;
 213     case FF_CMP_BIT:
 214         return 1;
 215     }
 216 }
 217
 218 //FIXME copy&paste
 219 #define P_LEFT P[1]
 220 #define P_TOP P[2]
 221 #define P_TOPRIGHT P[3]
 222 #define P_MEDIAN P[4]
 223 #define P_MV1 P[9]
 224 #define FLAG_QPEL   1 //must be 1
 225
 226 static int encode_q_branch(SnowContext *s, int level, int x, int y){
 227     uint8_t p_buffer[1024];
 228     uint8_t i_buffer[1024];
 229     uint8_t p_state[sizeof(s->block_state)];
 230     uint8_t i_state[sizeof(s->block_state)];
 231     RangeCoder pc, ic;
 232     uint8_t *pbbak= s->c.bytestream;
 233     uint8_t *pbbak_start= s->c.bytestream_start;
 234     int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
 235     const int w= s->b_width  << s->block_max_depth;
 236     const int h= s->b_height << s->block_max_depth;
 237     const int rem_depth= s->block_max_depth - level;
 238     const int index= (x + y*w) << rem_depth;
 239     const int block_w= 1<<(LOG2_MB_SIZE - level);
 240     int trx= (x+1)<<rem_depth;
 241     int try= (y+1)<<rem_depth;
 242     const BlockNode *left  = x ? &s->block[index-1] : &null_block;
 243     const BlockNode *top   = y ? &s->block[index-w] : &null_block;
 244     const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
 245     const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
 246     const BlockNode *tl    = y && x ? &s->block[index-w-1] : left;
 247     const BlockNode *tr    = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
 248     int pl = left->color[0];
 249     int pcb= left->color[1];
 250     int pcr= left->color[2];
 251     int pmx, pmy;
 252     int mx=0, my=0;
 253     int l,cr,cb;
 254     const int stride= s->current_picture->linesize[0];
 255     const int uvstride= s->current_picture->linesize[1];
 256     uint8_t *current_data[3]= { s->input_picture->data[0] + (x + y*  stride)*block_w,
 257                                 s->input_picture->data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
 258                                 s->input_picture->data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
 259     int P[10][2];
 260     int16_t last_mv[3][2];
 261     int qpel= !!(s->avctx->flags & AV_CODEC_FLAG_QPEL); //unused
 262     const int shift= 1+qpel;
 263     MotionEstContext *c= &s->m.me;
 264     int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
 265     int mx_context= av_log2(2*FFABS(left->mx - top->mx));
 266     int my_context= av_log2(2*FFABS(left->my - top->my));
 267     int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
 268     int ref, best_ref, ref_score, ref_mx, ref_my;
 269
 270     av_assert0(sizeof(s->block_state) >= 256);
 271     if(s->keyframe){
 272         set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
 273         return 0;
 274     }
 275
 276 //    clip predictors / edge ?
 277
 278     P_LEFT[0]= left->mx;
 279     P_LEFT[1]= left->my;
 280     P_TOP [0]= top->mx;
 281     P_TOP [1]= top->my;
 282     P_TOPRIGHT[0]= tr->mx;
 283     P_TOPRIGHT[1]= tr->my;
 284
 285     last_mv[0][0]= s->block[index].mx;
 286     last_mv[0][1]= s->block[index].my;
 287     last_mv[1][0]= right->mx;
 288     last_mv[1][1]= right->my;
 289     last_mv[2][0]= bottom->mx;
 290     last_mv[2][1]= bottom->my;
 291
 292     s->m.mb_stride=2;
 293     s->m.mb_x=
 294     s->m.mb_y= 0;
 295     c->skip= 0;
 296
 297     av_assert1(c->  stride ==   stride);
 298     av_assert1(c->uvstride == uvstride);
 299
 300     c->penalty_factor    = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
 301     c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
 302     c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
 303     c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_DMV;
 304
 305     c->xmin = - x*block_w - 16+3;
 306     c->ymin = - y*block_w - 16+3;
 307     c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
 308     c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
 309
 310     if(P_LEFT[0]     > (c->xmax<<shift)) P_LEFT[0]    = (c->xmax<<shift);
 311     if(P_LEFT[1]     > (c->ymax<<shift)) P_LEFT[1]    = (c->ymax<<shift);
 312     if(P_TOP[0]      > (c->xmax<<shift)) P_TOP[0]     = (c->xmax<<shift);
 313     if(P_TOP[1]      > (c->ymax<<shift)) P_TOP[1]     = (c->ymax<<shift);
 314     if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
 315     if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
 316     if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
 317
 318     P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
 319     P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
 320
 321     if (!y) {
 322         c->pred_x= P_LEFT[0];
 323         c->pred_y= P_LEFT[1];
 324     } else {
 325         c->pred_x = P_MEDIAN[0];
 326         c->pred_y = P_MEDIAN[1];
 327     }
 328
 329     score= INT_MAX;
 330     best_ref= 0;
 331     for(ref=0; ref<s->ref_frames; ref++){
 332         init_ref(c, current_data, s->last_picture[ref]->data, NULL, block_w*x, block_w*y, 0);
 333
 334         ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
 335                                          (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
 336
 337         av_assert2(ref_mx >= c->xmin);
 338         av_assert2(ref_mx <= c->xmax);
 339         av_assert2(ref_my >= c->ymin);
 340         av_assert2(ref_my <= c->ymax);
 341
 342         ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
 343         ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
 344         ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
 345         if(s->ref_mvs[ref]){
 346             s->ref_mvs[ref][index][0]= ref_mx;
 347             s->ref_mvs[ref][index][1]= ref_my;
 348             s->ref_scores[ref][index]= ref_score;
 349         }
 350         if(score > ref_score){
 351             score= ref_score;
 352             best_ref= ref;
 353             mx= ref_mx;
 354             my= ref_my;
 355         }
 356     }
 357     //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
 358
 359   //  subpel search
 360     base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
 361     pc= s->c;
 362     pc.bytestream_start=
 363     pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
 364     memcpy(p_state, s->block_state, sizeof(s->block_state));
 365
 366     if(level!=s->block_max_depth)
 367         put_rac(&pc, &p_state[4 + s_context], 1);
 368     put_rac(&pc, &p_state[1 + left->type + top->type], 0);
 369     if(s->ref_frames > 1)
 370         put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
 371     pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
 372     put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
 373     put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
 374     p_len= pc.bytestream - pc.bytestream_start;
 375     score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
 376
 377     block_s= block_w*block_w;
 378     sum = pix_sum(current_data[0], stride, block_w, block_w);
 379     l= (sum + block_s/2)/block_s;
 380     iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
 381
 382     if (s->nb_planes > 2) {
 383         block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
 384         sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
 385         cb= (sum + block_s/2)/block_s;
 386     //    iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
 387         sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
 388         cr= (sum + block_s/2)/block_s;
 389     //    iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
 390     }else
 391         cb = cr = 0;
 392
 393     ic= s->c;
 394     ic.bytestream_start=
 395     ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
 396     memcpy(i_state, s->block_state, sizeof(s->block_state));
 397     if(level!=s->block_max_depth)
 398         put_rac(&ic, &i_state[4 + s_context], 1);
 399     put_rac(&ic, &i_state[1 + left->type + top->type], 1);
 400     put_symbol(&ic, &i_state[32],  l-pl , 1);
 401     if (s->nb_planes > 2) {
 402         put_symbol(&ic, &i_state[64], cb-pcb, 1);
 403         put_symbol(&ic, &i_state[96], cr-pcr, 1);
 404     }
 405     i_len= ic.bytestream - ic.bytestream_start;
 406     iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
 407
 408     av_assert1(iscore < 255*255*256 + s->lambda2*10);
 409     av_assert1(iscore >= 0);
 410     av_assert1(l>=0 && l<=255);
 411     av_assert1(pl>=0 && pl<=255);
 412
 413     if(level==0){
 414         int varc= iscore >> 8;
 415         int vard= score >> 8;
 416         if (vard <= 64 || vard < varc)
 417             c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
 418         else
 419             c->scene_change_score+= s->m.qscale;
 420     }
 421
 422     if(level!=s->block_max_depth){
 423         put_rac(&s->c, &s->block_state[4 + s_context], 0);
 424         score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
 425         score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
 426         score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
 427         score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
 428         score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
 429
 430         if(score2 < score && score2 < iscore)
 431             return score2;
 432     }
 433
 434     if(iscore < score){
 435         pred_mv(s, &pmx, &pmy, 0, left, top, tr);
 436         memcpy(pbbak, i_buffer, i_len);
 437         s->c= ic;
 438         s->c.bytestream_start= pbbak_start;
 439         s->c.bytestream= pbbak + i_len;
 440         set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
 441         memcpy(s->block_state, i_state, sizeof(s->block_state));
 442         return iscore;
 443     }else{
 444         memcpy(pbbak, p_buffer, p_len);
 445         s->c= pc;
 446         s->c.bytestream_start= pbbak_start;
 447         s->c.bytestream= pbbak + p_len;
 448         set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
 449         memcpy(s->block_state, p_state, sizeof(s->block_state));
 450         return score;
 451     }
 452 }
 453
 454 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
 455     const int w= s->b_width  << s->block_max_depth;
 456     const int rem_depth= s->block_max_depth - level;
 457     const int index= (x + y*w) << rem_depth;
 458     int trx= (x+1)<<rem_depth;
 459     BlockNode *b= &s->block[index];
 460     const BlockNode *left  = x ? &s->block[index-1] : &null_block;
 461     const BlockNode *top   = y ? &s->block[index-w] : &null_block;
 462     const BlockNode *tl    = y && x ? &s->block[index-w-1] : left;
 463     const BlockNode *tr    = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
 464     int pl = left->color[0];
 465     int pcb= left->color[1];
 466     int pcr= left->color[2];
 467     int pmx, pmy;
 468     int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
 469     int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
 470     int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
 471     int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
 472
 473     if(s->keyframe){
 474         set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
 475         return;
 476     }
 477
 478     if(level!=s->block_max_depth){
 479         if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
 480             put_rac(&s->c, &s->block_state[4 + s_context], 1);
 481         }else{
 482             put_rac(&s->c, &s->block_state[4 + s_context], 0);
 483             encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
 484             encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
 485             encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
 486             encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
 487             return;
 488         }
 489     }
 490     if(b->type & BLOCK_INTRA){
 491         pred_mv(s, &pmx, &pmy, 0, left, top, tr);
 492         put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
 493         put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
 494         if (s->nb_planes > 2) {
 495             put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
 496             put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
 497         }
 498         set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
 499     }else{
 500         pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
 501         put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
 502         if(s->ref_frames > 1)
 503             put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
 504         put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
 505         put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
 506         set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
 507     }
 508 }
 509
 510 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
 511     int i, x2, y2;
 512     Plane *p= &s->plane[plane_index];
 513     const int block_size = MB_SIZE >> s->block_max_depth;
 514     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;
 515     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;
 516     const uint8_t *obmc  = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
 517     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
 518     const int ref_stride= s->current_picture->linesize[plane_index];
 519     uint8_t *src= s-> input_picture->data[plane_index];
 520     IDWTELEM *dst= (IDWTELEM*)s->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
 521     const int b_stride = s->b_width << s->block_max_depth;
 522     const int w= p->width;
 523     const int h= p->height;
 524     int index= mb_x + mb_y*b_stride;
 525     BlockNode *b= &s->block[index];
 526     BlockNode backup= *b;
 527     int ab=0;
 528     int aa=0;
 529
 530     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
 531
 532     b->type|= BLOCK_INTRA;
 533     b->color[plane_index]= 0;
 534     memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
 535
 536     for(i=0; i<4; i++){
 537         int mb_x2= mb_x + (i &1) - 1;
 538         int mb_y2= mb_y + (i>>1) - 1;
 539         int x= block_w*mb_x2 + block_w/2;
 540         int y= block_h*mb_y2 + block_h/2;
 541
 542         add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
 543                     x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
 544
 545         for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
 546             for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
 547                 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
 548                 int obmc_v= obmc[index];
 549                 int d;
 550                 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
 551                 if(x<0) obmc_v += obmc[index + block_w];
 552                 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
 553                 if(x+block_w>w) obmc_v += obmc[index - block_w];
 554                 //FIXME precalculate this or simplify it somehow else
 555
 556                 d = -dst[index] + (1<<(FRAC_BITS-1));
 557                 dst[index] = d;
 558                 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
 559                 aa += obmc_v * obmc_v; //FIXME precalculate this
 560             }
 561         }
 562     }
 563     *b= backup;
 564
 565     return av_clip_uint8( ROUNDED_DIV(ab<<LOG2_OBMC_MAX, aa) ); //FIXME we should not need clipping
 566 }
 567
 568 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
 569     const int b_stride = s->b_width << s->block_max_depth;
 570     const int b_height = s->b_height<< s->block_max_depth;
 571     int index= x + y*b_stride;
 572     const BlockNode *b     = &s->block[index];
 573     const BlockNode *left  = x ? &s->block[index-1] : &null_block;
 574     const BlockNode *top   = y ? &s->block[index-b_stride] : &null_block;
 575     const BlockNode *tl    = y && x ? &s->block[index-b_stride-1] : left;
 576     const BlockNode *tr    = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
 577     int dmx, dmy;
 578 //  int mx_context= av_log2(2*FFABS(left->mx - top->mx));
 579 //  int my_context= av_log2(2*FFABS(left->my - top->my));
 580
 581     if(x<0 || x>=b_stride || y>=b_height)
 582         return 0;
 583 /*
 584 1            0      0
 585 01X          1-2    1
 586 001XX        3-6    2-3
 587 0001XXX      7-14   4-7
 588 00001XXXX   15-30   8-15
 589 */
 590 //FIXME try accurate rate
 591 //FIXME intra and inter predictors if surrounding blocks are not the same type
 592     if(b->type & BLOCK_INTRA){
 593         return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
 594                    + av_log2(2*FFABS(left->color[1] - b->color[1]))
 595                    + av_log2(2*FFABS(left->color[2] - b->color[2])));
 596     }else{
 597         pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
 598         dmx-= b->mx;
 599         dmy-= b->my;
 600         return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
 601                     + av_log2(2*FFABS(dmy))
 602                     + av_log2(2*b->ref));
 603     }
 604 }
 605
 606 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){
 607     Plane *p= &s->plane[plane_index];
 608     const int block_size = MB_SIZE >> s->block_max_depth;
 609     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;
 610     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;
 611     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
 612     const int ref_stride= s->current_picture->linesize[plane_index];
 613     uint8_t *dst= s->current_picture->data[plane_index];
 614     uint8_t *src= s->  input_picture->data[plane_index];
 615     IDWTELEM *pred= (IDWTELEM*)s->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4;
 616     uint8_t *cur = s->scratchbuf;
 617     uint8_t *tmp = s->emu_edge_buffer;
 618     const int b_stride = s->b_width << s->block_max_depth;
 619     const int b_height = s->b_height<< s->block_max_depth;
 620     const int w= p->width;
 621     const int h= p->height;
 622     int distortion;
 623     int rate= 0;
 624     const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
 625     int sx= block_w*mb_x - block_w/2;
 626     int sy= block_h*mb_y - block_h/2;
 627     int x0= FFMAX(0,-sx);
 628     int y0= FFMAX(0,-sy);
 629     int x1= FFMIN(block_w*2, w-sx);
 630     int y1= FFMIN(block_h*2, h-sy);
 631     int i,x,y;
 632
 633     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
 634
 635     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);
 636
 637     for(y=y0; y<y1; y++){
 638         const uint8_t *obmc1= obmc_edged[y];
 639         const IDWTELEM *pred1 = pred + y*obmc_stride;
 640         uint8_t *cur1 = cur + y*ref_stride;
 641         uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
 642         for(x=x0; x<x1; x++){
 643 #if FRAC_BITS >= LOG2_OBMC_MAX
 644             int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
 645 #else
 646             int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
 647 #endif
 648             v = (v + pred1[x]) >> FRAC_BITS;
 649             if(v&(~255)) v= ~(v>>31);
 650             dst1[x] = v;
 651         }
 652     }
 653
 654     /* copy the regions where obmc[] = (uint8_t)256 */
 655     if(LOG2_OBMC_MAX == 8
 656         && (mb_x == 0 || mb_x == b_stride-1)
 657         && (mb_y == 0 || mb_y == b_height-1)){
 658         if(mb_x == 0)
 659             x1 = block_w;
 660         else
 661             x0 = block_w;
 662         if(mb_y == 0)
 663             y1 = block_h;
 664         else
 665             y0 = block_h;
 666         for(y=y0; y<y1; y++)
 667             memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
 668     }
 669
 670     if(block_w==16){
 671         /* FIXME rearrange dsputil to fit 32x32 cmp functions */
 672         /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
 673         /* FIXME cmps overlap but do not cover the wavelet's whole support.
 674          * So improving the score of one block is not strictly guaranteed
 675          * to improve the score of the whole frame, thus iterative motion
 676          * estimation does not always converge. */
 677         if(s->avctx->me_cmp == FF_CMP_W97)
 678             distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
 679         else if(s->avctx->me_cmp == FF_CMP_W53)
 680             distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
 681         else{
 682             distortion = 0;
 683             for(i=0; i<4; i++){
 684                 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
 685                 distortion += s->mecc.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
 686             }
 687         }
 688     }else{
 689         av_assert2(block_w==8);
 690         distortion = s->mecc.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
 691     }
 692
 693     if(plane_index==0){
 694         for(i=0; i<4; i++){
 695 /* ..RRr
 696  * .RXx.
 697  * rxx..
 698  */
 699             rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
 700         }
 701         if(mb_x == b_stride-2)
 702             rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
 703     }
 704     return distortion + rate*penalty_factor;
 705 }
 706
 707 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
 708     int i, y2;
 709     Plane *p= &s->plane[plane_index];
 710     const int block_size = MB_SIZE >> s->block_max_depth;
 711     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;
 712     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;
 713     const uint8_t *obmc  = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
 714     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
 715     const int ref_stride= s->current_picture->linesize[plane_index];
 716     uint8_t *dst= s->current_picture->data[plane_index];
 717     uint8_t *src= s-> input_picture->data[plane_index];
 718     //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
 719     // const has only been removed from zero_dst to suppress a warning
 720     static IDWTELEM zero_dst[4096]; //FIXME
 721     const int b_stride = s->b_width << s->block_max_depth;
 722     const int w= p->width;
 723     const int h= p->height;
 724     int distortion= 0;
 725     int rate= 0;
 726     const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
 727
 728     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
 729
 730     for(i=0; i<9; i++){
 731         int mb_x2= mb_x + (i%3) - 1;
 732         int mb_y2= mb_y + (i/3) - 1;
 733         int x= block_w*mb_x2 + block_w/2;
 734         int y= block_h*mb_y2 + block_h/2;
 735
 736         add_yblock(s, 0, NULL, zero_dst, dst, obmc,
 737                    x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
 738
 739         //FIXME find a cleaner/simpler way to skip the outside stuff
 740         for(y2= y; y2<0; y2++)
 741             memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
 742         for(y2= h; y2<y+block_h; y2++)
 743             memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
 744         if(x<0){
 745             for(y2= y; y2<y+block_h; y2++)
 746                 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
 747         }
 748         if(x+block_w > w){
 749             for(y2= y; y2<y+block_h; y2++)
 750                 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
 751         }
 752
 753         av_assert1(block_w== 8 || block_w==16);
 754         distortion += s->mecc.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
 755     }
 756
 757     if(plane_index==0){
 758         BlockNode *b= &s->block[mb_x+mb_y*b_stride];
 759         int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
 760
 761 /* ..RRRr
 762  * .RXXx.
 763  * .RXXx.
 764  * rxxx.
 765  */
 766         if(merged)
 767             rate = get_block_bits(s, mb_x, mb_y, 2);
 768         for(i=merged?4:0; i<9; i++){
 769             static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
 770             rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
 771         }
 772     }
 773     return distortion + rate*penalty_factor;
 774 }
 775
 776 static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
 777     const int w= b->width;
 778     const int h= b->height;
 779     int x, y;
 780
 781     if(1){
 782         int run=0;
 783         int *runs = s->run_buffer;
 784         int run_index=0;
 785         int max_index;
 786
 787         for(y=0; y<h; y++){
 788             for(x=0; x<w; x++){
 789                 int v, p=0;
 790                 int /*ll=0, */l=0, lt=0, t=0, rt=0;
 791                 v= src[x + y*stride];
 792
 793                 if(y){
 794                     t= src[x + (y-1)*stride];
 795                     if(x){
 796                         lt= src[x - 1 + (y-1)*stride];
 797                     }
 798                     if(x + 1 < w){
 799                         rt= src[x + 1 + (y-1)*stride];
 800                     }
 801                 }
 802                 if(x){
 803                     l= src[x - 1 + y*stride];
 804                     /*if(x > 1){
 805                         if(orientation==1) ll= src[y + (x-2)*stride];
 806                         else               ll= src[x - 2 + y*stride];
 807                     }*/
 808                 }
 809                 if(parent){
 810                     int px= x>>1;
 811                     int py= y>>1;
 812                     if(px<b->parent->width && py<b->parent->height)
 813                         p= parent[px + py*2*stride];
 814                 }
 815                 if(!(/*ll|*/l|lt|t|rt|p)){
 816                     if(v){
 817                         runs[run_index++]= run;
 818                         run=0;
 819                     }else{
 820                         run++;
 821                     }
 822                 }
 823             }
 824         }
 825         max_index= run_index;
 826         runs[run_index++]= run;
 827         run_index=0;
 828         run= runs[run_index++];
 829
 830         put_symbol2(&s->c, b->state[30], max_index, 0);
 831         if(run_index <= max_index)
 832             put_symbol2(&s->c, b->state[1], run, 3);
 833
 834         for(y=0; y<h; y++){
 835             if(s->c.bytestream_end - s->c.bytestream < w*40){
 836                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 837                 return AVERROR(ENOMEM);
 838             }
 839             for(x=0; x<w; x++){
 840                 int v, p=0;
 841                 int /*ll=0, */l=0, lt=0, t=0, rt=0;
 842                 v= src[x + y*stride];
 843
 844                 if(y){
 845                     t= src[x + (y-1)*stride];
 846                     if(x){
 847                         lt= src[x - 1 + (y-1)*stride];
 848                     }
 849                     if(x + 1 < w){
 850                         rt= src[x + 1 + (y-1)*stride];
 851                     }
 852                 }
 853                 if(x){
 854                     l= src[x - 1 + y*stride];
 855                     /*if(x > 1){
 856                         if(orientation==1) ll= src[y + (x-2)*stride];
 857                         else               ll= src[x - 2 + y*stride];
 858                     }*/
 859                 }
 860                 if(parent){
 861                     int px= x>>1;
 862                     int py= y>>1;
 863                     if(px<b->parent->width && py<b->parent->height)
 864                         p= parent[px + py*2*stride];
 865                 }
 866                 if(/*ll|*/l|lt|t|rt|p){
 867                     int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
 868
 869                     put_rac(&s->c, &b->state[0][context], !!v);
 870                 }else{
 871                     if(!run){
 872                         run= runs[run_index++];
 873
 874                         if(run_index <= max_index)
 875                             put_symbol2(&s->c, b->state[1], run, 3);
 876                         av_assert2(v);
 877                     }else{
 878                         run--;
 879                         av_assert2(!v);
 880                     }
 881                 }
 882                 if(v){
 883                     int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
 884                     int l2= 2*FFABS(l) + (l<0);
 885                     int t2= 2*FFABS(t) + (t<0);
 886
 887                     put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
 888                     put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
 889                 }
 890             }
 891         }
 892     }
 893     return 0;
 894 }
 895
 896 static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
 897 //    encode_subband_qtree(s, b, src, parent, stride, orientation);
 898 //    encode_subband_z0run(s, b, src, parent, stride, orientation);
 899     return encode_subband_c0run(s, b, src, parent, stride, orientation);
 900 //    encode_subband_dzr(s, b, src, parent, stride, orientation);
 901 }
 902
 903 static av_always_inline int check_block(SnowContext *s, int mb_x, int mb_y, int p[3], int intra, uint8_t (*obmc_edged)[MB_SIZE * 2], int *best_rd){
 904     const int b_stride= s->b_width << s->block_max_depth;
 905     BlockNode *block= &s->block[mb_x + mb_y * b_stride];
 906     BlockNode backup= *block;
 907     unsigned value;
 908     int rd, index;
 909
 910     av_assert2(mb_x>=0 && mb_y>=0);
 911     av_assert2(mb_x<b_stride);
 912
 913     if(intra){
 914         block->color[0] = p[0];
 915         block->color[1] = p[1];
 916         block->color[2] = p[2];
 917         block->type |= BLOCK_INTRA;
 918     }else{
 919         index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
 920         value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
 921         if(s->me_cache[index] == value)
 922             return 0;
 923         s->me_cache[index]= value;
 924
 925         block->mx= p[0];
 926         block->my= p[1];
 927         block->type &= ~BLOCK_INTRA;
 928     }
 929
 930     rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged) + s->intra_penalty * !!intra;
 931
 932 //FIXME chroma
 933     if(rd < *best_rd){
 934         *best_rd= rd;
 935         return 1;
 936     }else{
 937         *block= backup;
 938         return 0;
 939     }
 940 }
 941
 942 /* special case for int[2] args we discard afterwards,
 943  * fixes compilation problem with gcc 2.95 */
 944 static av_always_inline int check_block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, uint8_t (*obmc_edged)[MB_SIZE * 2], int *best_rd){
 945     int p[2] = {p0, p1};
 946     return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
 947 }
 948
 949 static av_always_inline int check_4block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, int ref, int *best_rd){
 950     const int b_stride= s->b_width << s->block_max_depth;
 951     BlockNode *block= &s->block[mb_x + mb_y * b_stride];
 952     BlockNode backup[4];
 953     unsigned value;
 954     int rd, index;
 955
 956     /* We don't initialize backup[] during variable declaration, because
 957      * that fails to compile on MSVC: "cannot convert from 'BlockNode' to
 958      * 'int16_t'". */
 959     backup[0] = block[0];
 960     backup[1] = block[1];
 961     backup[2] = block[b_stride];
 962     backup[3] = block[b_stride + 1];
 963
 964     av_assert2(mb_x>=0 && mb_y>=0);
 965     av_assert2(mb_x<b_stride);
 966     av_assert2(((mb_x|mb_y)&1) == 0);
 967
 968     index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
 969     value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
 970     if(s->me_cache[index] == value)
 971         return 0;
 972     s->me_cache[index]= value;
 973
 974     block->mx= p0;
 975     block->my= p1;
 976     block->ref= ref;
 977     block->type &= ~BLOCK_INTRA;
 978     block[1]= block[b_stride]= block[b_stride+1]= *block;
 979
 980     rd= get_4block_rd(s, mb_x, mb_y, 0);
 981
 982 //FIXME chroma
 983     if(rd < *best_rd){
 984         *best_rd= rd;
 985         return 1;
 986     }else{
 987         block[0]= backup[0];
 988         block[1]= backup[1];
 989         block[b_stride]= backup[2];
 990         block[b_stride+1]= backup[3];
 991         return 0;
 992     }
 993 }
 994
 995 static void iterative_me(SnowContext *s){
 996     int pass, mb_x, mb_y;
 997     const int b_width = s->b_width  << s->block_max_depth;
 998     const int b_height= s->b_height << s->block_max_depth;
 999     const int b_stride= b_width;
1000     int color[3];
1001
1002     {
1003         RangeCoder r = s->c;
1004         uint8_t state[sizeof(s->block_state)];
1005         memcpy(state, s->block_state, sizeof(s->block_state));
1006         for(mb_y= 0; mb_y<s->b_height; mb_y++)
1007             for(mb_x= 0; mb_x<s->b_width; mb_x++)
1008                 encode_q_branch(s, 0, mb_x, mb_y);
1009         s->c = r;
1010         memcpy(s->block_state, state, sizeof(s->block_state));
1011     }
1012
1013     for(pass=0; pass<25; pass++){
1014         int change= 0;
1015
1016         for(mb_y= 0; mb_y<b_height; mb_y++){
1017             for(mb_x= 0; mb_x<b_width; mb_x++){
1018                 int dia_change, i, j, ref;
1019                 int best_rd= INT_MAX, ref_rd;
1020                 BlockNode backup, ref_b;
1021                 const int index= mb_x + mb_y * b_stride;
1022                 BlockNode *block= &s->block[index];
1023                 BlockNode *tb =                   mb_y            ? &s->block[index-b_stride  ] : NULL;
1024                 BlockNode *lb = mb_x                              ? &s->block[index         -1] : NULL;
1025                 BlockNode *rb = mb_x+1<b_width                    ? &s->block[index         +1] : NULL;
1026                 BlockNode *bb =                   mb_y+1<b_height ? &s->block[index+b_stride  ] : NULL;
1027                 BlockNode *tlb= mb_x           && mb_y            ? &s->block[index-b_stride-1] : NULL;
1028                 BlockNode *trb= mb_x+1<b_width && mb_y            ? &s->block[index-b_stride+1] : NULL;
1029                 BlockNode *blb= mb_x           && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1030                 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1031                 const int b_w= (MB_SIZE >> s->block_max_depth);
1032                 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
1033
1034                 if(pass && (block->type & BLOCK_OPT))
1035                     continue;
1036                 block->type |= BLOCK_OPT;
1037
1038                 backup= *block;
1039
1040                 if(!s->me_cache_generation)
1041                     memset(s->me_cache, 0, sizeof(s->me_cache));
1042                 s->me_cache_generation += 1<<22;
1043
1044                 //FIXME precalculate
1045                 {
1046                     int x, y;
1047                     for (y = 0; y < b_w * 2; y++)
1048                         memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
1049                     if(mb_x==0)
1050                         for(y=0; y<b_w*2; y++)
1051                             memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1052                     if(mb_x==b_stride-1)
1053                         for(y=0; y<b_w*2; y++)
1054                             memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1055                     if(mb_y==0){
1056                         for(x=0; x<b_w*2; x++)
1057                             obmc_edged[0][x] += obmc_edged[b_w-1][x];
1058                         for(y=1; y<b_w; y++)
1059                             memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1060                     }
1061                     if(mb_y==b_height-1){
1062                         for(x=0; x<b_w*2; x++)
1063                             obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1064                         for(y=b_w; y<b_w*2-1; y++)
1065                             memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1066                     }
1067                 }
1068
1069                 //skip stuff outside the picture
1070                 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1071                     uint8_t *src= s->  input_picture->data[0];
1072                     uint8_t *dst= s->current_picture->data[0];
1073                     const int stride= s->current_picture->linesize[0];
1074                     const int block_w= MB_SIZE >> s->block_max_depth;
1075                     const int block_h= MB_SIZE >> s->block_max_depth;
1076                     const int sx= block_w*mb_x - block_w/2;
1077                     const int sy= block_h*mb_y - block_h/2;
1078                     const int w= s->plane[0].width;
1079                     const int h= s->plane[0].height;
1080                     int y;
1081
1082                     for(y=sy; y<0; y++)
1083                         memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1084                     for(y=h; y<sy+block_h*2; y++)
1085                         memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1086                     if(sx<0){
1087                         for(y=sy; y<sy+block_h*2; y++)
1088                             memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1089                     }
1090                     if(sx+block_w*2 > w){
1091                         for(y=sy; y<sy+block_h*2; y++)
1092                             memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1093                     }
1094                 }
1095
1096                 // intra(black) = neighbors' contribution to the current block
1097                 for(i=0; i < s->nb_planes; i++)
1098                     color[i]= get_dc(s, mb_x, mb_y, i);
1099
1100                 // get previous score (cannot be cached due to OBMC)
1101                 if(pass > 0 && (block->type&BLOCK_INTRA)){
1102                     int color0[3]= {block->color[0], block->color[1], block->color[2]};
1103                     check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);
1104                 }else
1105                     check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
1106
1107                 ref_b= *block;
1108                 ref_rd= best_rd;
1109                 for(ref=0; ref < s->ref_frames; ref++){
1110                     int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1111                     if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1112                         continue;
1113                     block->ref= ref;
1114                     best_rd= INT_MAX;
1115
1116                     check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
1117                     check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
1118                     if(tb)
1119                         check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
1120                     if(lb)
1121                         check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);
1122                     if(rb)
1123                         check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);
1124                     if(bb)
1125                         check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
1126
1127                     /* fullpel ME */
1128                     //FIXME avoid subpel interpolation / round to nearest integer
1129                     do{
1130                         int newx = block->mx;
1131                         int newy = block->my;
1132                         int dia_size = s->iterative_dia_size ? s->iterative_dia_size : FFMAX(s->avctx->dia_size, 1);
1133                         dia_change=0;
1134                         for(i=0; i < dia_size; i++){
1135                             for(j=0; j<i; j++){
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*(i-j), newy-(4*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                                 dia_change |= check_block_inter(s, mb_x, mb_y, newx+(4*j), newy-4*(i-j), obmc_edged, &best_rd);
1140                             }
1141                         }
1142                     }while(dia_change);
1143                     /* subpel ME */
1144                     do{
1145                         static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1146                         dia_change=0;
1147                         for(i=0; i<8; i++)
1148                             dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
1149                     }while(dia_change);
1150                     //FIXME or try the standard 2 pass qpel or similar
1151
1152                     mvr[0][0]= block->mx;
1153                     mvr[0][1]= block->my;
1154                     if(ref_rd > best_rd){
1155                         ref_rd= best_rd;
1156                         ref_b= *block;
1157                     }
1158                 }
1159                 best_rd= ref_rd;
1160                 *block= ref_b;
1161                 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);
1162                 //FIXME RD style color selection
1163                 if(!same_block(block, &backup)){
1164                     if(tb ) tb ->type &= ~BLOCK_OPT;
1165                     if(lb ) lb ->type &= ~BLOCK_OPT;
1166                     if(rb ) rb ->type &= ~BLOCK_OPT;
1167                     if(bb ) bb ->type &= ~BLOCK_OPT;
1168                     if(tlb) tlb->type &= ~BLOCK_OPT;
1169                     if(trb) trb->type &= ~BLOCK_OPT;
1170                     if(blb) blb->type &= ~BLOCK_OPT;
1171                     if(brb) brb->type &= ~BLOCK_OPT;
1172                     change ++;
1173                 }
1174             }
1175         }
1176         av_log(s->avctx, AV_LOG_DEBUG, "pass:%d changed:%d\n", pass, change);
1177         if(!change)
1178             break;
1179     }
1180
1181     if(s->block_max_depth == 1){
1182         int change= 0;
1183         for(mb_y= 0; mb_y<b_height; mb_y+=2){
1184             for(mb_x= 0; mb_x<b_width; mb_x+=2){
1185                 int i;
1186                 int best_rd, init_rd;
1187                 const int index= mb_x + mb_y * b_stride;
1188                 BlockNode *b[4];
1189
1190                 b[0]= &s->block[index];
1191                 b[1]= b[0]+1;
1192                 b[2]= b[0]+b_stride;
1193                 b[3]= b[2]+1;
1194                 if(same_block(b[0], b[1]) &&
1195                    same_block(b[0], b[2]) &&
1196                    same_block(b[0], b[3]))
1197                     continue;
1198
1199                 if(!s->me_cache_generation)
1200                     memset(s->me_cache, 0, sizeof(s->me_cache));
1201                 s->me_cache_generation += 1<<22;
1202
1203                 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1204
1205                 //FIXME more multiref search?
1206                 check_4block_inter(s, mb_x, mb_y,
1207                                    (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1208                                    (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1209
1210                 for(i=0; i<4; i++)
1211                     if(!(b[i]->type&BLOCK_INTRA))
1212                         check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1213
1214                 if(init_rd != best_rd)
1215                     change++;
1216             }
1217         }
1218         av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1219     }
1220 }
1221
1222 static void encode_blocks(SnowContext *s, int search){
1223     int x, y;
1224     int w= s->b_width;
1225     int h= s->b_height;
1226
1227     if(s->motion_est == FF_ME_ITER && !s->keyframe && search)
1228         iterative_me(s);
1229
1230     for(y=0; y<h; y++){
1231         if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1232             av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1233             return;
1234         }
1235         for(x=0; x<w; x++){
1236             if(s->motion_est == FF_ME_ITER || !search)
1237                 encode_q_branch2(s, 0, x, y);
1238             else
1239                 encode_q_branch (s, 0, x, y);
1240         }
1241     }
1242 }
1243
1244 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1245     const int w= b->width;
1246     const int h= b->height;
1247     const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1248     const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1249     int x,y, thres1, thres2;
1250
1251     if(s->qlog == LOSSLESS_QLOG){
1252         for(y=0; y<h; y++)
1253             for(x=0; x<w; x++)
1254                 dst[x + y*stride]= src[x + y*stride];
1255         return;
1256     }
1257
1258     bias= bias ? 0 : (3*qmul)>>3;
1259     thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1260     thres2= 2*thres1;
1261
1262     if(!bias){
1263         for(y=0; y<h; y++){
1264             for(x=0; x<w; x++){
1265                 int i= src[x + y*stride];
1266
1267                 if((unsigned)(i+thres1) > thres2){
1268                     if(i>=0){
1269                         i<<= QEXPSHIFT;
1270                         i/= qmul; //FIXME optimize
1271                         dst[x + y*stride]=  i;
1272                     }else{
1273                         i= -i;
1274                         i<<= QEXPSHIFT;
1275                         i/= qmul; //FIXME optimize
1276                         dst[x + y*stride]= -i;
1277                     }
1278                 }else
1279                     dst[x + y*stride]= 0;
1280             }
1281         }
1282     }else{
1283         for(y=0; y<h; y++){
1284             for(x=0; x<w; x++){
1285                 int i= src[x + y*stride];
1286
1287                 if((unsigned)(i+thres1) > thres2){
1288                     if(i>=0){
1289                         i<<= QEXPSHIFT;
1290                         i= (i + bias) / qmul; //FIXME optimize
1291                         dst[x + y*stride]=  i;
1292                     }else{
1293                         i= -i;
1294                         i<<= QEXPSHIFT;
1295                         i= (i + bias) / qmul; //FIXME optimize
1296                         dst[x + y*stride]= -i;
1297                     }
1298                 }else
1299                     dst[x + y*stride]= 0;
1300             }
1301         }
1302     }
1303 }
1304
1305 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1306     const int w= b->width;
1307     const int h= b->height;
1308     const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1309     const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1310     const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1311     int x,y;
1312
1313     if(s->qlog == LOSSLESS_QLOG) return;
1314
1315     for(y=0; y<h; y++){
1316         for(x=0; x<w; x++){
1317             int i= src[x + y*stride];
1318             if(i<0){
1319                 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1320             }else if(i>0){
1321                 src[x + y*stride]=  (( i*qmul + qadd)>>(QEXPSHIFT));
1322             }
1323         }
1324     }
1325 }
1326
1327 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1328     const int w= b->width;
1329     const int h= b->height;
1330     int x,y;
1331
1332     for(y=h-1; y>=0; y--){
1333         for(x=w-1; x>=0; x--){
1334             int i= x + y*stride;
1335
1336             if(x){
1337                 if(use_median){
1338                     if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1339                     else  src[i] -= src[i - 1];
1340                 }else{
1341                     if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1342                     else  src[i] -= src[i - 1];
1343                 }
1344             }else{
1345                 if(y) src[i] -= src[i - stride];
1346             }
1347         }
1348     }
1349 }
1350
1351 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1352     const int w= b->width;
1353     const int h= b->height;
1354     int x,y;
1355
1356     for(y=0; y<h; y++){
1357         for(x=0; x<w; x++){
1358             int i= x + y*stride;
1359
1360             if(x){
1361                 if(use_median){
1362                     if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1363                     else  src[i] += src[i - 1];
1364                 }else{
1365                     if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1366                     else  src[i] += src[i - 1];
1367                 }
1368             }else{
1369                 if(y) src[i] += src[i - stride];
1370             }
1371         }
1372     }
1373 }
1374
1375 static void encode_qlogs(SnowContext *s){
1376     int plane_index, level, orientation;
1377
1378     for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1379         for(level=0; level<s->spatial_decomposition_count; level++){
1380             for(orientation=level ? 1:0; orientation<4; orientation++){
1381                 if(orientation==2) continue;
1382                 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1383             }
1384         }
1385     }
1386 }
1387
1388 static void encode_header(SnowContext *s){
1389     int plane_index, i;
1390     uint8_t kstate[32];
1391
1392     memset(kstate, MID_STATE, sizeof(kstate));
1393
1394     put_rac(&s->c, kstate, s->keyframe);
1395     if(s->keyframe || s->always_reset){
1396         ff_snow_reset_contexts(s);
1397         s->last_spatial_decomposition_type=
1398         s->last_qlog=
1399         s->last_qbias=
1400         s->last_mv_scale=
1401         s->last_block_max_depth= 0;
1402         for(plane_index=0; plane_index<2; plane_index++){
1403             Plane *p= &s->plane[plane_index];
1404             p->last_htaps=0;
1405             p->last_diag_mc=0;
1406             memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1407         }
1408     }
1409     if(s->keyframe){
1410         put_symbol(&s->c, s->header_state, s->version, 0);
1411         put_rac(&s->c, s->header_state, s->always_reset);
1412         put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1413         put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1414         put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1415         put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1416         if (s->nb_planes > 2) {
1417             put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1418             put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1419         }
1420         put_rac(&s->c, s->header_state, s->spatial_scalability);
1421 //        put_rac(&s->c, s->header_state, s->rate_scalability);
1422         put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1423
1424         encode_qlogs(s);
1425     }
1426
1427     if(!s->keyframe){
1428         int update_mc=0;
1429         for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1430             Plane *p= &s->plane[plane_index];
1431             update_mc |= p->last_htaps   != p->htaps;
1432             update_mc |= p->last_diag_mc != p->diag_mc;
1433             update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1434         }
1435         put_rac(&s->c, s->header_state, update_mc);
1436         if(update_mc){
1437             for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
1438                 Plane *p= &s->plane[plane_index];
1439                 put_rac(&s->c, s->header_state, p->diag_mc);
1440                 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1441                 for(i= p->htaps/2; i; i--)
1442                     put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1443             }
1444         }
1445         if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1446             put_rac(&s->c, s->header_state, 1);
1447             put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1448             encode_qlogs(s);
1449         }else
1450             put_rac(&s->c, s->header_state, 0);
1451     }
1452
1453     put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1454     put_symbol(&s->c, s->header_state, s->qlog            - s->last_qlog    , 1);
1455     put_symbol(&s->c, s->header_state, s->mv_scale        - s->last_mv_scale, 1);
1456     put_symbol(&s->c, s->header_state, s->qbias           - s->last_qbias   , 1);
1457     put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1458
1459 }
1460
1461 static void update_last_header_values(SnowContext *s){
1462     int plane_index;
1463
1464     if(!s->keyframe){
1465         for(plane_index=0; plane_index<2; plane_index++){
1466             Plane *p= &s->plane[plane_index];
1467             p->last_diag_mc= p->diag_mc;
1468             p->last_htaps  = p->htaps;
1469             memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1470         }
1471     }
1472
1473     s->last_spatial_decomposition_type  = s->spatial_decomposition_type;
1474     s->last_qlog                        = s->qlog;
1475     s->last_qbias                       = s->qbias;
1476     s->last_mv_scale                    = s->mv_scale;
1477     s->last_block_max_depth             = s->block_max_depth;
1478     s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1479 }
1480
1481 static int qscale2qlog(int qscale){
1482     return lrint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))
1483            + 61*QROOT/8; ///< 64 > 60
1484 }
1485
1486 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1487 {
1488     /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1489      * FIXME we know exact mv bits at this point,
1490      * but ratecontrol isn't set up to include them. */
1491     uint32_t coef_sum= 0;
1492     int level, orientation, delta_qlog;
1493
1494     for(level=0; level<s->spatial_decomposition_count; level++){
1495         for(orientation=level ? 1 : 0; orientation<4; orientation++){
1496             SubBand *b= &s->plane[0].band[level][orientation];
1497             IDWTELEM *buf= b->ibuf;
1498             const int w= b->width;
1499             const int h= b->height;
1500             const int stride= b->stride;
1501             const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1502             const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1503             const int qdiv= (1<<16)/qmul;
1504             int x, y;
1505             //FIXME this is ugly
1506             for(y=0; y<h; y++)
1507                 for(x=0; x<w; x++)
1508                     buf[x+y*stride]= b->buf[x+y*stride];
1509             if(orientation==0)
1510                 decorrelate(s, b, buf, stride, 1, 0);
1511             for(y=0; y<h; y++)
1512                 for(x=0; x<w; x++)
1513                     coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1514         }
1515     }
1516
1517     /* ugly, ratecontrol just takes a sqrt again */
1518     av_assert0(coef_sum < INT_MAX);
1519     coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1520
1521     if(pict->pict_type == AV_PICTURE_TYPE_I){
1522         s->m.current_picture.mb_var_sum= coef_sum;
1523         s->m.current_picture.mc_mb_var_sum= 0;
1524     }else{
1525         s->m.current_picture.mc_mb_var_sum= coef_sum;
1526         s->m.current_picture.mb_var_sum= 0;
1527     }
1528
1529     pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1530     if (pict->quality < 0)
1531         return INT_MIN;
1532     s->lambda= pict->quality * 3/2;
1533     delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1534     s->qlog+= delta_qlog;
1535     return delta_qlog;
1536 }
1537
1538 static void calculate_visual_weight(SnowContext *s, Plane *p){
1539     int width = p->width;
1540     int height= p->height;
1541     int level, orientation, x, y;
1542
1543     for(level=0; level<s->spatial_decomposition_count; level++){
1544         for(orientation=level ? 1 : 0; orientation<4; orientation++){
1545             SubBand *b= &p->band[level][orientation];
1546             IDWTELEM *ibuf= b->ibuf;
1547             int64_t error=0;
1548
1549             memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1550             ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1551             ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1552             for(y=0; y<height; y++){
1553                 for(x=0; x<width; x++){
1554                     int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1555                     error += d*d;
1556                 }
1557             }
1558
1559             b->qlog= (int)(QROOT * log2(352256.0/sqrt(error)) + 0.5);
1560         }
1561     }
1562 }
1563
1564 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1565                         const AVFrame *pict, int *got_packet)
1566 {
1567     SnowContext *s = avctx->priv_data;
1568     RangeCoder * const c= &s->c;
1569     AVFrame *pic;
1570     const int width= s->avctx->width;
1571     const int height= s->avctx->height;
1572     int level, orientation, plane_index, i, y, ret;
1573     uint8_t rc_header_bak[sizeof(s->header_state)];
1574     uint8_t rc_block_bak[sizeof(s->block_state)];
1575
1576     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)
1577         return ret;
1578
1579     ff_init_range_encoder(c, pkt->data, pkt->size);
1580     ff_build_rac_states(c, (1LL<<32)/20, 256-8);
1581
1582     for(i=0; i < s->nb_planes; i++){
1583         int hshift= i ? s->chroma_h_shift : 0;
1584         int vshift= i ? s->chroma_v_shift : 0;
1585         for(y=0; y<AV_CEIL_RSHIFT(height, vshift); y++)
1586             memcpy(&s->input_picture->data[i][y * s->input_picture->linesize[i]],
1587                    &pict->data[i][y * pict->linesize[i]],
1588                    AV_CEIL_RSHIFT(width, hshift));
1589         s->mpvencdsp.draw_edges(s->input_picture->data[i], s->input_picture->linesize[i],
1590                                 AV_CEIL_RSHIFT(width, hshift), AV_CEIL_RSHIFT(height, vshift),
1591                                 EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
1592                                 EDGE_TOP | EDGE_BOTTOM);
1593
1594     }
1595     emms_c();
1596     pic = s->input_picture;
1597     pic->pict_type = pict->pict_type;
1598     pic->quality = pict->quality;
1599
1600     s->m.picture_number= avctx->frame_number;
1601     if(avctx->flags&AV_CODEC_FLAG_PASS2){
1602         s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1603         s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
1604         if(!(avctx->flags&AV_CODEC_FLAG_QSCALE)) {
1605             pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1606             if (pic->quality < 0)
1607                 return -1;
1608         }
1609     }else{
1610         s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1611         s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1612     }
1613
1614     if(s->pass1_rc && avctx->frame_number == 0)
1615         pic->quality = 2*FF_QP2LAMBDA;
1616     if (pic->quality) {
1617         s->qlog   = qscale2qlog(pic->quality);
1618         s->lambda = pic->quality * 3/2;
1619     }
1620     if (s->qlog < 0 || (!pic->quality && (avctx->flags & AV_CODEC_FLAG_QSCALE))) {
1621         s->qlog= LOSSLESS_QLOG;
1622         s->lambda = 0;
1623     }//else keep previous frame's qlog until after motion estimation
1624
1625     if (s->current_picture->data[0]
1626 #if FF_API_EMU_EDGE
1627         && !(s->avctx->flags&CODEC_FLAG_EMU_EDGE)
1628 #endif
1629         ) {
1630         int w = s->avctx->width;
1631         int h = s->avctx->height;
1632
1633         s->mpvencdsp.draw_edges(s->current_picture->data[0],
1634                                 s->current_picture->linesize[0], w   , h   ,
1635                                 EDGE_WIDTH  , EDGE_WIDTH  , EDGE_TOP | EDGE_BOTTOM);
1636         if (s->current_picture->data[2]) {
1637             s->mpvencdsp.draw_edges(s->current_picture->data[1],
1638                                     s->current_picture->linesize[1], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
1639                                     EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
1640             s->mpvencdsp.draw_edges(s->current_picture->data[2],
1641                                     s->current_picture->linesize[2], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
1642                                     EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
1643         }
1644         emms_c();
1645     }
1646
1647     ff_snow_frame_start(s);
1648 #if FF_API_CODED_FRAME
1649 FF_DISABLE_DEPRECATION_WARNINGS
1650     av_frame_unref(avctx->coded_frame);
1651     ret = av_frame_ref(avctx->coded_frame, s->current_picture);
1652 FF_ENABLE_DEPRECATION_WARNINGS
1653 #endif
1654     if (ret < 0)
1655         return ret;
1656
1657     s->m.current_picture_ptr= &s->m.current_picture;
1658     s->m.current_picture.f = s->current_picture;
1659     s->m.current_picture.f->pts = pict->pts;
1660     if(pic->pict_type == AV_PICTURE_TYPE_P){
1661         int block_width = (width +15)>>4;
1662         int block_height= (height+15)>>4;
1663         int stride= s->current_picture->linesize[0];
1664
1665         av_assert0(s->current_picture->data[0]);
1666         av_assert0(s->last_picture[0]->data[0]);
1667
1668         s->m.avctx= s->avctx;
1669         s->m.   last_picture.f = s->last_picture[0];
1670         s->m.    new_picture.f = s->input_picture;
1671         s->m.   last_picture_ptr= &s->m.   last_picture;
1672         s->m.linesize = stride;
1673         s->m.uvlinesize= s->current_picture->linesize[1];
1674         s->m.width = width;
1675         s->m.height= height;
1676         s->m.mb_width = block_width;
1677         s->m.mb_height= block_height;
1678         s->m.mb_stride=   s->m.mb_width+1;
1679         s->m.b8_stride= 2*s->m.mb_width+1;
1680         s->m.f_code=1;
1681         s->m.pict_type = pic->pict_type;
1682 #if FF_API_MOTION_EST
1683 FF_DISABLE_DEPRECATION_WARNINGS
1684         s->m.me_method= s->avctx->me_method;
1685 FF_ENABLE_DEPRECATION_WARNINGS
1686 #endif
1687         s->m.motion_est= s->motion_est;
1688         s->m.me.scene_change_score=0;
1689         s->m.me.dia_size = avctx->dia_size;
1690         s->m.quarter_sample= (s->avctx->flags & AV_CODEC_FLAG_QPEL)!=0;
1691         s->m.out_format= FMT_H263;
1692         s->m.unrestricted_mv= 1;
1693
1694         s->m.lambda = s->lambda;
1695         s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1696         s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1697
1698         s->m.mecc= s->mecc; //move
1699         s->m.qdsp= s->qdsp; //move
1700         s->m.hdsp = s->hdsp;
1701         ff_init_me(&s->m);
1702         s->hdsp = s->m.hdsp;
1703         s->mecc= s->m.mecc;
1704     }
1705
1706     if(s->pass1_rc){
1707         memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1708         memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1709     }
1710
1711 redo_frame:
1712
1713     s->spatial_decomposition_count= 5;
1714
1715     while(   !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
1716           || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
1717         s->spatial_decomposition_count--;
1718
1719     if (s->spatial_decomposition_count <= 0) {
1720         av_log(avctx, AV_LOG_ERROR, "Resolution too low\n");
1721         return AVERROR(EINVAL);
1722     }
1723
1724     s->m.pict_type = pic->pict_type;
1725     s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
1726
1727     ff_snow_common_init_after_header(avctx);
1728
1729     if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1730         for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1731             calculate_visual_weight(s, &s->plane[plane_index]);
1732         }
1733     }
1734
1735     encode_header(s);
1736     s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1737     encode_blocks(s, 1);
1738     s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
1739
1740     for(plane_index=0; plane_index < s->nb_planes; plane_index++){
1741         Plane *p= &s->plane[plane_index];
1742         int w= p->width;
1743         int h= p->height;
1744         int x, y;
1745 //        int bits= put_bits_count(&s->c.pb);
1746
1747         if (!s->memc_only) {
1748             //FIXME optimize
1749             if(pict->data[plane_index]) //FIXME gray hack
1750                 for(y=0; y<h; y++){
1751                     for(x=0; x<w; x++){
1752                         s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
1753                     }
1754                 }
1755             predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
1756
1757 #if FF_API_PRIVATE_OPT
1758 FF_DISABLE_DEPRECATION_WARNINGS
1759             if(s->avctx->scenechange_threshold)
1760                 s->scenechange_threshold = s->avctx->scenechange_threshold;
1761 FF_ENABLE_DEPRECATION_WARNINGS
1762 #endif
1763
1764             if(   plane_index==0
1765                && pic->pict_type == AV_PICTURE_TYPE_P
1766                && !(avctx->flags&AV_CODEC_FLAG_PASS2)
1767                && s->m.me.scene_change_score > s->scenechange_threshold){
1768                 ff_init_range_encoder(c, pkt->data, pkt->size);
1769                 ff_build_rac_states(c, (1LL<<32)/20, 256-8);
1770                 pic->pict_type= AV_PICTURE_TYPE_I;
1771                 s->keyframe=1;
1772                 s->current_picture->key_frame=1;
1773                 goto redo_frame;
1774             }
1775
1776             if(s->qlog == LOSSLESS_QLOG){
1777                 for(y=0; y<h; y++){
1778                     for(x=0; x<w; x++){
1779                         s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
1780                     }
1781                 }
1782             }else{
1783                 for(y=0; y<h; y++){
1784                     for(x=0; x<w; x++){
1785                         s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
1786                     }
1787                 }
1788             }
1789
1790             ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1791
1792             if(s->pass1_rc && plane_index==0){
1793                 int delta_qlog = ratecontrol_1pass(s, pic);
1794                 if (delta_qlog <= INT_MIN)
1795                     return -1;
1796                 if(delta_qlog){
1797                     //reordering qlog in the bitstream would eliminate this reset
1798                     ff_init_range_encoder(c, pkt->data, pkt->size);
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                     quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1811                     if(orientation==0)
1812                         decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
1813                     if (!s->no_bitstream)
1814                     encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1815                     av_assert0(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
1829             ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
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
1840             if(pic->pict_type == AV_PICTURE_TYPE_I){
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&AV_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->encoding_error[plane_index] = error;
1864         }
1865
1866     }
1867     emms_c();
1868
1869     update_last_header_values(s);
1870
1871     ff_snow_release_buffer(avctx);
1872
1873     s->current_picture->coded_picture_number = avctx->frame_number;
1874     s->current_picture->pict_type = pic->pict_type;
1875     s->current_picture->quality = pic->quality;
1876     s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
1877     s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
1878     s->m.current_picture.f->display_picture_number =
1879     s->m.current_picture.f->coded_picture_number   = avctx->frame_number;
1880     s->m.current_picture.f->quality                = pic->quality;
1881     s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
1882     if(s->pass1_rc)
1883         if (ff_rate_estimate_qscale(&s->m, 0) < 0)
1884             return -1;
1885     if(avctx->flags&AV_CODEC_FLAG_PASS1)
1886         ff_write_pass1_stats(&s->m);
1887     s->m.last_pict_type = s->m.pict_type;
1888 #if FF_API_STAT_BITS
1889 FF_DISABLE_DEPRECATION_WARNINGS
1890     avctx->frame_bits = s->m.frame_bits;
1891     avctx->mv_bits = s->m.mv_bits;
1892     avctx->misc_bits = s->m.misc_bits;
1893     avctx->p_tex_bits = s->m.p_tex_bits;
1894 FF_ENABLE_DEPRECATION_WARNINGS
1895 #endif
1896
1897     emms_c();
1898
1899     ff_side_data_set_encoder_stats(pkt, s->current_picture->quality,
1900                                    s->encoding_error,
1901                                    (s->avctx->flags&AV_CODEC_FLAG_PSNR) ? 4 : 0,
1902                                    s->current_picture->pict_type);
1903
1904 #if FF_API_ERROR_FRAME
1905 FF_DISABLE_DEPRECATION_WARNINGS
1906     memcpy(s->current_picture->error, s->encoding_error, sizeof(s->encoding_error));
1907 FF_ENABLE_DEPRECATION_WARNINGS
1908 #endif
1909
1910     pkt->size = ff_rac_terminate(c);
1911     if (s->current_picture->key_frame)
1912         pkt->flags |= AV_PKT_FLAG_KEY;
1913     *got_packet = 1;
1914
1915     return 0;
1916 }
1917
1918 static av_cold int encode_end(AVCodecContext *avctx)
1919 {
1920     SnowContext *s = avctx->priv_data;
1921
1922     ff_snow_common_end(s);
1923     ff_rate_control_uninit(&s->m);
1924     av_frame_free(&s->input_picture);
1925     av_freep(&avctx->stats_out);
1926
1927     return 0;
1928 }
1929
1930 #define OFFSET(x) offsetof(SnowContext, x)
1931 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1932 static const AVOption options[] = {
1933     {"motion_est", "motion estimation algorithm", OFFSET(motion_est), AV_OPT_TYPE_INT, {.i64 = FF_ME_EPZS }, FF_ME_ZERO, FF_ME_ITER, VE, "motion_est" },
1934     { "zero", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ZERO }, 0, 0, VE, "motion_est" },
1935     { "epzs", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_EPZS }, 0, 0, VE, "motion_est" },
1936     { "xone", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_XONE }, 0, 0, VE, "motion_est" },
1937     { "iter", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ITER }, 0, 0, VE, "motion_est" },
1938     { "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 },
1939     { "no_bitstream",   "Skip final bitstream writeout.",                    OFFSET(no_bitstream), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1940     { "intra_penalty",  "Penalty for intra blocks in block decission",      OFFSET(intra_penalty), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
1941     { "iterative_dia_size",  "Dia size for the iterative ME",          OFFSET(iterative_dia_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
1942     { "sc_threshold",   "Scene change threshold",                   OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, VE },
1943     { "pred",           "Spatial decomposition type",                                OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 0 }, DWT_97, DWT_53, VE, "pred" },
1944         { "dwt97", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "pred" },
1945         { "dwt53", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
1946     { NULL },
1947 };
1948
1949 static const AVClass snowenc_class = {
1950     .class_name = "snow encoder",
1951     .item_name  = av_default_item_name,
1952     .option     = options,
1953     .version    = LIBAVUTIL_VERSION_INT,
1954 };
1955
1956 AVCodec ff_snow_encoder = {
1957     .name           = "snow",
1958     .long_name      = NULL_IF_CONFIG_SMALL("Snow"),
1959     .type           = AVMEDIA_TYPE_VIDEO,
1960     .id             = AV_CODEC_ID_SNOW,
1961     .priv_data_size = sizeof(SnowContext),
1962     .init           = encode_init,
1963     .encode2        = encode_frame,
1964     .close          = encode_end,
1965     .pix_fmts       = (const enum AVPixelFormat[]){
1966         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,
1967         AV_PIX_FMT_GRAY8,
1968         AV_PIX_FMT_NONE
1969     },
1970     .priv_class     = &snowenc_class,
1971     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
1972                       FF_CODEC_CAP_INIT_CLEANUP,
1973 };