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/log.h"
  23 #include "libavutil/opt.h"
  24 #include "avcodec.h"
  25 #include "internal.h"
  26 #include "dsputil.h"
  27 #include "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 #undef NDEBUG
  37 #include <assert.h>
  38
  39 #define QUANTIZE2 0
  40
  41 #if QUANTIZE2==1
  42 #define Q2_STEP 8
  43
  44 static void find_sse(SnowContext *s, Plane *p, int *score, int score_stride, IDWTELEM *r0, IDWTELEM *r1, int level, int orientation){
  45     SubBand *b= &p->band[level][orientation];
  46     int x, y;
  47     int xo=0;
  48     int yo=0;
  49     int step= 1 << (s->spatial_decomposition_count - level);
  50
  51     if(orientation&1)
  52         xo= step>>1;
  53     if(orientation&2)
  54         yo= step>>1;
  55
  56     //FIXME bias for nonzero ?
  57     //FIXME optimize
  58     memset(score, 0, sizeof(*score)*score_stride*((p->height + Q2_STEP-1)/Q2_STEP));
  59     for(y=0; y<p->height; y++){
  60         for(x=0; x<p->width; x++){
  61             int sx= (x-xo + step/2) / step / Q2_STEP;
  62             int sy= (y-yo + step/2) / step / Q2_STEP;
  63             int v= r0[x + y*p->width] - r1[x + y*p->width];
  64             assert(sx>=0 && sy>=0 && sx < score_stride);
  65             v= ((v+8)>>4)<<4;
  66             score[sx + sy*score_stride] += v*v;
  67             assert(score[sx + sy*score_stride] >= 0);
  68         }
  69     }
  70 }
  71
  72 static void dequantize_all(SnowContext *s, Plane *p, IDWTELEM *buffer, int width, int height){
  73     int level, orientation;
  74
  75     for(level=0; level<s->spatial_decomposition_count; level++){
  76         for(orientation=level ? 1 : 0; orientation<4; orientation++){
  77             SubBand *b= &p->band[level][orientation];
  78             IDWTELEM *dst= buffer + (b->ibuf - s->spatial_idwt_buffer);
  79
  80             dequantize(s, b, dst, b->stride);
  81         }
  82     }
  83 }
  84
  85 static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, int height, int stride, int type){
  86     int level, orientation, ys, xs, x, y, pass;
  87     IDWTELEM best_dequant[height * stride];
  88     IDWTELEM idwt2_buffer[height * stride];
  89     const int score_stride= (width + 10)/Q2_STEP;
  90     int best_score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
  91     int score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
  92     int threshold= (s->m.lambda * s->m.lambda) >> 6;
  93
  94     //FIXME pass the copy cleanly ?
  95
  96 //    memcpy(dwt_buffer, buffer, height * stride * sizeof(DWTELEM));
  97     ff_spatial_dwt(buffer, s->temp_dwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
  98
  99     for(level=0; level<s->spatial_decomposition_count; level++){
 100         for(orientation=level ? 1 : 0; orientation<4; orientation++){
 101             SubBand *b= &p->band[level][orientation];
 102             IDWTELEM *dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
 103              DWTELEM *src=       buffer + (b-> buf - s->spatial_dwt_buffer);
 104             assert(src == b->buf); // code does not depend on this but it is true currently
 105
 106             quantize(s, b, dst, src, b->stride, s->qbias);
 107         }
 108     }
 109     for(pass=0; pass<1; pass++){
 110         if(s->qbias == 0) //keyframe
 111             continue;
 112         for(level=0; level<s->spatial_decomposition_count; level++){
 113             for(orientation=level ? 1 : 0; orientation<4; orientation++){
 114                 SubBand *b= &p->band[level][orientation];
 115                 IDWTELEM *dst= idwt2_buffer + (b->ibuf - s->spatial_idwt_buffer);
 116                 IDWTELEM *best_dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
 117
 118                 for(ys= 0; ys<Q2_STEP; ys++){
 119                     for(xs= 0; xs<Q2_STEP; xs++){
 120                         memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
 121                         dequantize_all(s, p, idwt2_buffer, width, height);
 122                         ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
 123                         find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
 124                         memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
 125                         for(y=ys; y<b->height; y+= Q2_STEP){
 126                             for(x=xs; x<b->width; x+= Q2_STEP){
 127                                 if(dst[x + y*b->stride]<0) dst[x + y*b->stride]++;
 128                                 if(dst[x + y*b->stride]>0) dst[x + y*b->stride]--;
 129                                 //FIXME try more than just --
 130                             }
 131                         }
 132                         dequantize_all(s, p, idwt2_buffer, width, height);
 133                         ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
 134                         find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
 135                         for(y=ys; y<b->height; y+= Q2_STEP){
 136                             for(x=xs; x<b->width; x+= Q2_STEP){
 137                                 int score_idx= x/Q2_STEP + (y/Q2_STEP)*score_stride;
 138                                 if(score[score_idx] <= best_score[score_idx] + threshold){
 139                                     best_score[score_idx]= score[score_idx];
 140                                     if(best_dst[x + y*b->stride]<0) best_dst[x + y*b->stride]++;
 141                                     if(best_dst[x + y*b->stride]>0) best_dst[x + y*b->stride]--;
 142                                     //FIXME copy instead
 143                                 }
 144                             }
 145                         }
 146                     }
 147                 }
 148             }
 149         }
 150     }
 151     memcpy(s->spatial_idwt_buffer, best_dequant, height * stride * sizeof(IDWTELEM)); //FIXME work with that directly instead of copy at the end
 152 }
 153
 154 #endif /* QUANTIZE2==1 */
 155
 156 static av_cold int encode_init(AVCodecContext *avctx)
 157 {
 158     SnowContext *s = avctx->priv_data;
 159     int plane_index;
 160
 161     if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
 162         av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
 163                "Use vstrict=-2 / -strict -2 to use it anyway.\n");
 164         return -1;
 165     }
 166
 167     if(avctx->prediction_method == DWT_97
 168        && (avctx->flags & CODEC_FLAG_QSCALE)
 169        && avctx->global_quality == 0){
 170         av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
 171         return -1;
 172     }
 173
 174     s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
 175
 176     s->mv_scale       = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
 177     s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
 178
 179     for(plane_index=0; plane_index<3; plane_index++){
 180         s->plane[plane_index].diag_mc= 1;
 181         s->plane[plane_index].htaps= 6;
 182         s->plane[plane_index].hcoeff[0]=  40;
 183         s->plane[plane_index].hcoeff[1]= -10;
 184         s->plane[plane_index].hcoeff[2]=   2;
 185         s->plane[plane_index].fast_mc= 1;
 186     }
 187
 188     ff_snow_common_init(avctx);
 189     ff_snow_alloc_blocks(s);
 190
 191     s->version=0;
 192
 193     s->m.avctx   = avctx;
 194     s->m.flags   = avctx->flags;
 195     s->m.bit_rate= avctx->bit_rate;
 196
 197     s->m.me.temp      =
 198     s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
 199     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 200     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 201     s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
 202     ff_h263_encode_init(&s->m); //mv_penalty
 203
 204     s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
 205
 206     if(avctx->flags&CODEC_FLAG_PASS1){
 207         if(!avctx->stats_out)
 208             avctx->stats_out = av_mallocz(256);
 209     }
 210     if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
 211         if(ff_rate_control_init(&s->m) < 0)
 212             return -1;
 213     }
 214     s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
 215
 216     avctx->coded_frame= &s->current_picture;
 217     switch(avctx->pix_fmt){
 218     case PIX_FMT_YUV444P:
 219 //    case PIX_FMT_YUV422P:
 220     case PIX_FMT_YUV420P:
 221 //     case PIX_FMT_GRAY8:
 222 //    case PIX_FMT_YUV411P:
 223     case PIX_FMT_YUV410P:
 224         s->colorspace_type= 0;
 225         break;
 226 /*    case PIX_FMT_RGB32:
 227         s->colorspace= 1;
 228         break;*/
 229     default:
 230         av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
 231         return -1;
 232     }
 233     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
 234
 235     ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
 236     ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
 237
 238     s->avctx->get_buffer(s->avctx, &s->input_picture);
 239
 240     if(s->avctx->me_method == ME_ITER){
 241         int i;
 242         int size= s->b_width * s->b_height << 2*s->block_max_depth;
 243         for(i=0; i<s->max_ref_frames; i++){
 244             s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
 245             s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
 246         }
 247     }
 248
 249     s->runs = av_malloc(avctx->width * avctx->height * sizeof(*s->runs));
 250
 251     return 0;
 252 }
 253
 254 //near copy & paste from dsputil, FIXME
 255 static int pix_sum(uint8_t * pix, int line_size, int w, int h)
 256 {
 257     int s, i, j;
 258
 259     s = 0;
 260     for (i = 0; i < h; i++) {
 261         for (j = 0; j < w; j++) {
 262             s += pix[0];
 263             pix ++;
 264         }
 265         pix += line_size - w;
 266     }
 267     return s;
 268 }
 269
 270 //near copy & paste from dsputil, FIXME
 271 static int pix_norm1(uint8_t * pix, int line_size, int w)
 272 {
 273     int s, i, j;
 274     uint32_t *sq = ff_squareTbl + 256;
 275
 276     s = 0;
 277     for (i = 0; i < w; i++) {
 278         for (j = 0; j < w; j ++) {
 279             s += sq[pix[0]];
 280             pix ++;
 281         }
 282         pix += line_size - w;
 283     }
 284     return s;
 285 }
 286
 287 //FIXME copy&paste
 288 #define P_LEFT P[1]
 289 #define P_TOP P[2]
 290 #define P_TOPRIGHT P[3]
 291 #define P_MEDIAN P[4]
 292 #define P_MV1 P[9]
 293 #define FLAG_QPEL   1 //must be 1
 294
 295 static int encode_q_branch(SnowContext *s, int level, int x, int y){
 296     uint8_t p_buffer[1024];
 297     uint8_t i_buffer[1024];
 298     uint8_t p_state[sizeof(s->block_state)];
 299     uint8_t i_state[sizeof(s->block_state)];
 300     RangeCoder pc, ic;
 301     uint8_t *pbbak= s->c.bytestream;
 302     uint8_t *pbbak_start= s->c.bytestream_start;
 303     int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
 304     const int w= s->b_width  << s->block_max_depth;
 305     const int h= s->b_height << s->block_max_depth;
 306     const int rem_depth= s->block_max_depth - level;
 307     const int index= (x + y*w) << rem_depth;
 308     const int block_w= 1<<(LOG2_MB_SIZE - level);
 309     int trx= (x+1)<<rem_depth;
 310     int try= (y+1)<<rem_depth;
 311     const BlockNode *left  = x ? &s->block[index-1] : &null_block;
 312     const BlockNode *top   = y ? &s->block[index-w] : &null_block;
 313     const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
 314     const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
 315     const BlockNode *tl    = y && x ? &s->block[index-w-1] : left;
 316     const BlockNode *tr    = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
 317     int pl = left->color[0];
 318     int pcb= left->color[1];
 319     int pcr= left->color[2];
 320     int pmx, pmy;
 321     int mx=0, my=0;
 322     int l,cr,cb;
 323     const int stride= s->current_picture.linesize[0];
 324     const int uvstride= s->current_picture.linesize[1];
 325     uint8_t *current_data[3]= { s->input_picture.data[0] + (x + y*  stride)*block_w,
 326                                 s->input_picture.data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
 327                                 s->input_picture.data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
 328     int P[10][2];
 329     int16_t last_mv[3][2];
 330     int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
 331     const int shift= 1+qpel;
 332     MotionEstContext *c= &s->m.me;
 333     int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
 334     int mx_context= av_log2(2*FFABS(left->mx - top->mx));
 335     int my_context= av_log2(2*FFABS(left->my - top->my));
 336     int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
 337     int ref, best_ref, ref_score, ref_mx, ref_my;
 338
 339     assert(sizeof(s->block_state) >= 256);
 340     if(s->keyframe){
 341         set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
 342         return 0;
 343     }
 344
 345 //    clip predictors / edge ?
 346
 347     P_LEFT[0]= left->mx;
 348     P_LEFT[1]= left->my;
 349     P_TOP [0]= top->mx;
 350     P_TOP [1]= top->my;
 351     P_TOPRIGHT[0]= tr->mx;
 352     P_TOPRIGHT[1]= tr->my;
 353
 354     last_mv[0][0]= s->block[index].mx;
 355     last_mv[0][1]= s->block[index].my;
 356     last_mv[1][0]= right->mx;
 357     last_mv[1][1]= right->my;
 358     last_mv[2][0]= bottom->mx;
 359     last_mv[2][1]= bottom->my;
 360
 361     s->m.mb_stride=2;
 362     s->m.mb_x=
 363     s->m.mb_y= 0;
 364     c->skip= 0;
 365
 366     assert(c->  stride ==   stride);
 367     assert(c->uvstride == uvstride);
 368
 369     c->penalty_factor    = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
 370     c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
 371     c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
 372     c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
 373
 374     c->xmin = - x*block_w - 16+3;
 375     c->ymin = - y*block_w - 16+3;
 376     c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
 377     c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
 378
 379     if(P_LEFT[0]     > (c->xmax<<shift)) P_LEFT[0]    = (c->xmax<<shift);
 380     if(P_LEFT[1]     > (c->ymax<<shift)) P_LEFT[1]    = (c->ymax<<shift);
 381     if(P_TOP[0]      > (c->xmax<<shift)) P_TOP[0]     = (c->xmax<<shift);
 382     if(P_TOP[1]      > (c->ymax<<shift)) P_TOP[1]     = (c->ymax<<shift);
 383     if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
 384     if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
 385     if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
 386
 387     P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
 388     P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
 389
 390     if (!y) {
 391         c->pred_x= P_LEFT[0];
 392         c->pred_y= P_LEFT[1];
 393     } else {
 394         c->pred_x = P_MEDIAN[0];
 395         c->pred_y = P_MEDIAN[1];
 396     }
 397
 398     score= INT_MAX;
 399     best_ref= 0;
 400     for(ref=0; ref<s->ref_frames; ref++){
 401         init_ref(c, current_data, s->last_picture[ref].data, NULL, block_w*x, block_w*y, 0);
 402
 403         ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
 404                                          (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
 405
 406         assert(ref_mx >= c->xmin);
 407         assert(ref_mx <= c->xmax);
 408         assert(ref_my >= c->ymin);
 409         assert(ref_my <= c->ymax);
 410
 411         ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
 412         ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
 413         ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
 414         if(s->ref_mvs[ref]){
 415             s->ref_mvs[ref][index][0]= ref_mx;
 416             s->ref_mvs[ref][index][1]= ref_my;
 417             s->ref_scores[ref][index]= ref_score;
 418         }
 419         if(score > ref_score){
 420             score= ref_score;
 421             best_ref= ref;
 422             mx= ref_mx;
 423             my= ref_my;
 424         }
 425     }
 426     //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
 427
 428   //  subpel search
 429     base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
 430     pc= s->c;
 431     pc.bytestream_start=
 432     pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
 433     memcpy(p_state, s->block_state, sizeof(s->block_state));
 434
 435     if(level!=s->block_max_depth)
 436         put_rac(&pc, &p_state[4 + s_context], 1);
 437     put_rac(&pc, &p_state[1 + left->type + top->type], 0);
 438     if(s->ref_frames > 1)
 439         put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
 440     pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
 441     put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
 442     put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
 443     p_len= pc.bytestream - pc.bytestream_start;
 444     score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
 445
 446     block_s= block_w*block_w;
 447     sum = pix_sum(current_data[0], stride, block_w, block_w);
 448     l= (sum + block_s/2)/block_s;
 449     iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
 450
 451     block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
 452     sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
 453     cb= (sum + block_s/2)/block_s;
 454 //    iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
 455     sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
 456     cr= (sum + block_s/2)/block_s;
 457 //    iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
 458
 459     ic= s->c;
 460     ic.bytestream_start=
 461     ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
 462     memcpy(i_state, s->block_state, sizeof(s->block_state));
 463     if(level!=s->block_max_depth)
 464         put_rac(&ic, &i_state[4 + s_context], 1);
 465     put_rac(&ic, &i_state[1 + left->type + top->type], 1);
 466     put_symbol(&ic, &i_state[32],  l-pl , 1);
 467     put_symbol(&ic, &i_state[64], cb-pcb, 1);
 468     put_symbol(&ic, &i_state[96], cr-pcr, 1);
 469     i_len= ic.bytestream - ic.bytestream_start;
 470     iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
 471
 472 //    assert(score==256*256*256*64-1);
 473     assert(iscore < 255*255*256 + s->lambda2*10);
 474     assert(iscore >= 0);
 475     assert(l>=0 && l<=255);
 476     assert(pl>=0 && pl<=255);
 477
 478     if(level==0){
 479         int varc= iscore >> 8;
 480         int vard= score >> 8;
 481         if (vard <= 64 || vard < varc)
 482             c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
 483         else
 484             c->scene_change_score+= s->m.qscale;
 485     }
 486
 487     if(level!=s->block_max_depth){
 488         put_rac(&s->c, &s->block_state[4 + s_context], 0);
 489         score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
 490         score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
 491         score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
 492         score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
 493         score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
 494
 495         if(score2 < score && score2 < iscore)
 496             return score2;
 497     }
 498
 499     if(iscore < score){
 500         pred_mv(s, &pmx, &pmy, 0, left, top, tr);
 501         memcpy(pbbak, i_buffer, i_len);
 502         s->c= ic;
 503         s->c.bytestream_start= pbbak_start;
 504         s->c.bytestream= pbbak + i_len;
 505         set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
 506         memcpy(s->block_state, i_state, sizeof(s->block_state));
 507         return iscore;
 508     }else{
 509         memcpy(pbbak, p_buffer, p_len);
 510         s->c= pc;
 511         s->c.bytestream_start= pbbak_start;
 512         s->c.bytestream= pbbak + p_len;
 513         set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
 514         memcpy(s->block_state, p_state, sizeof(s->block_state));
 515         return score;
 516     }
 517 }
 518
 519 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
 520     const int w= s->b_width  << s->block_max_depth;
 521     const int rem_depth= s->block_max_depth - level;
 522     const int index= (x + y*w) << rem_depth;
 523     int trx= (x+1)<<rem_depth;
 524     BlockNode *b= &s->block[index];
 525     const BlockNode *left  = x ? &s->block[index-1] : &null_block;
 526     const BlockNode *top   = y ? &s->block[index-w] : &null_block;
 527     const BlockNode *tl    = y && x ? &s->block[index-w-1] : left;
 528     const BlockNode *tr    = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
 529     int pl = left->color[0];
 530     int pcb= left->color[1];
 531     int pcr= left->color[2];
 532     int pmx, pmy;
 533     int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
 534     int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
 535     int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
 536     int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
 537
 538     if(s->keyframe){
 539         set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
 540         return;
 541     }
 542
 543     if(level!=s->block_max_depth){
 544         if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
 545             put_rac(&s->c, &s->block_state[4 + s_context], 1);
 546         }else{
 547             put_rac(&s->c, &s->block_state[4 + s_context], 0);
 548             encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
 549             encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
 550             encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
 551             encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
 552             return;
 553         }
 554     }
 555     if(b->type & BLOCK_INTRA){
 556         pred_mv(s, &pmx, &pmy, 0, left, top, tr);
 557         put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
 558         put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
 559         put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
 560         put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
 561         set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
 562     }else{
 563         pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
 564         put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
 565         if(s->ref_frames > 1)
 566             put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
 567         put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
 568         put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
 569         set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
 570     }
 571 }
 572
 573 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
 574     int i, x2, y2;
 575     Plane *p= &s->plane[plane_index];
 576     const int block_size = MB_SIZE >> s->block_max_depth;
 577     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;
 578     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;
 579     const uint8_t *obmc  = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
 580     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
 581     const int ref_stride= s->current_picture.linesize[plane_index];
 582     uint8_t *src= s-> input_picture.data[plane_index];
 583     IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
 584     const int b_stride = s->b_width << s->block_max_depth;
 585     const int w= p->width;
 586     const int h= p->height;
 587     int index= mb_x + mb_y*b_stride;
 588     BlockNode *b= &s->block[index];
 589     BlockNode backup= *b;
 590     int ab=0;
 591     int aa=0;
 592
 593     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
 594
 595     b->type|= BLOCK_INTRA;
 596     b->color[plane_index]= 0;
 597     memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
 598
 599     for(i=0; i<4; i++){
 600         int mb_x2= mb_x + (i &1) - 1;
 601         int mb_y2= mb_y + (i>>1) - 1;
 602         int x= block_w*mb_x2 + block_w/2;
 603         int y= block_h*mb_y2 + block_h/2;
 604
 605         add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
 606                     x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
 607
 608         for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
 609             for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
 610                 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
 611                 int obmc_v= obmc[index];
 612                 int d;
 613                 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
 614                 if(x<0) obmc_v += obmc[index + block_w];
 615                 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
 616                 if(x+block_w>w) obmc_v += obmc[index - block_w];
 617                 //FIXME precalculate this or simplify it somehow else
 618
 619                 d = -dst[index] + (1<<(FRAC_BITS-1));
 620                 dst[index] = d;
 621                 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
 622                 aa += obmc_v * obmc_v; //FIXME precalculate this
 623             }
 624         }
 625     }
 626     *b= backup;
 627
 628     return av_clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255); //FIXME we should not need clipping
 629 }
 630
 631 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
 632     const int b_stride = s->b_width << s->block_max_depth;
 633     const int b_height = s->b_height<< s->block_max_depth;
 634     int index= x + y*b_stride;
 635     const BlockNode *b     = &s->block[index];
 636     const BlockNode *left  = x ? &s->block[index-1] : &null_block;
 637     const BlockNode *top   = y ? &s->block[index-b_stride] : &null_block;
 638     const BlockNode *tl    = y && x ? &s->block[index-b_stride-1] : left;
 639     const BlockNode *tr    = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
 640     int dmx, dmy;
 641 //  int mx_context= av_log2(2*FFABS(left->mx - top->mx));
 642 //  int my_context= av_log2(2*FFABS(left->my - top->my));
 643
 644     if(x<0 || x>=b_stride || y>=b_height)
 645         return 0;
 646 /*
 647 1            0      0
 648 01X          1-2    1
 649 001XX        3-6    2-3
 650 0001XXX      7-14   4-7
 651 00001XXXX   15-30   8-15
 652 */
 653 //FIXME try accurate rate
 654 //FIXME intra and inter predictors if surrounding blocks are not the same type
 655     if(b->type & BLOCK_INTRA){
 656         return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
 657                    + av_log2(2*FFABS(left->color[1] - b->color[1]))
 658                    + av_log2(2*FFABS(left->color[2] - b->color[2])));
 659     }else{
 660         pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
 661         dmx-= b->mx;
 662         dmy-= b->my;
 663         return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
 664                     + av_log2(2*FFABS(dmy))
 665                     + av_log2(2*b->ref));
 666     }
 667 }
 668
 669 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, const uint8_t *obmc_edged){
 670     Plane *p= &s->plane[plane_index];
 671     const int block_size = MB_SIZE >> s->block_max_depth;
 672     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;
 673     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;
 674     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
 675     const int ref_stride= s->current_picture.linesize[plane_index];
 676     uint8_t *dst= s->current_picture.data[plane_index];
 677     uint8_t *src= s->  input_picture.data[plane_index];
 678     IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
 679     uint8_t *cur = s->scratchbuf;
 680     uint8_t tmp[ref_stride*(2*MB_SIZE+HTAPS_MAX-1)];
 681     const int b_stride = s->b_width << s->block_max_depth;
 682     const int b_height = s->b_height<< s->block_max_depth;
 683     const int w= p->width;
 684     const int h= p->height;
 685     int distortion;
 686     int rate= 0;
 687     const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
 688     int sx= block_w*mb_x - block_w/2;
 689     int sy= block_h*mb_y - block_h/2;
 690     int x0= FFMAX(0,-sx);
 691     int y0= FFMAX(0,-sy);
 692     int x1= FFMIN(block_w*2, w-sx);
 693     int y1= FFMIN(block_h*2, h-sy);
 694     int i,x,y;
 695
 696     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
 697
 698     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);
 699
 700     for(y=y0; y<y1; y++){
 701         const uint8_t *obmc1= obmc_edged + y*obmc_stride;
 702         const IDWTELEM *pred1 = pred + y*obmc_stride;
 703         uint8_t *cur1 = cur + y*ref_stride;
 704         uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
 705         for(x=x0; x<x1; x++){
 706 #if FRAC_BITS >= LOG2_OBMC_MAX
 707             int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
 708 #else
 709             int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
 710 #endif
 711             v = (v + pred1[x]) >> FRAC_BITS;
 712             if(v&(~255)) v= ~(v>>31);
 713             dst1[x] = v;
 714         }
 715     }
 716
 717     /* copy the regions where obmc[] = (uint8_t)256 */
 718     if(LOG2_OBMC_MAX == 8
 719         && (mb_x == 0 || mb_x == b_stride-1)
 720         && (mb_y == 0 || mb_y == b_height-1)){
 721         if(mb_x == 0)
 722             x1 = block_w;
 723         else
 724             x0 = block_w;
 725         if(mb_y == 0)
 726             y1 = block_h;
 727         else
 728             y0 = block_h;
 729         for(y=y0; y<y1; y++)
 730             memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
 731     }
 732
 733     if(block_w==16){
 734         /* FIXME rearrange dsputil to fit 32x32 cmp functions */
 735         /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
 736         /* FIXME cmps overlap but do not cover the wavelet's whole support.
 737          * So improving the score of one block is not strictly guaranteed
 738          * to improve the score of the whole frame, thus iterative motion
 739          * estimation does not always converge. */
 740         if(s->avctx->me_cmp == FF_CMP_W97)
 741             distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
 742         else if(s->avctx->me_cmp == FF_CMP_W53)
 743             distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
 744         else{
 745             distortion = 0;
 746             for(i=0; i<4; i++){
 747                 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
 748                 distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
 749             }
 750         }
 751     }else{
 752         assert(block_w==8);
 753         distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
 754     }
 755
 756     if(plane_index==0){
 757         for(i=0; i<4; i++){
 758 /* ..RRr
 759  * .RXx.
 760  * rxx..
 761  */
 762             rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
 763         }
 764         if(mb_x == b_stride-2)
 765             rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
 766     }
 767     return distortion + rate*penalty_factor;
 768 }
 769
 770 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
 771     int i, y2;
 772     Plane *p= &s->plane[plane_index];
 773     const int block_size = MB_SIZE >> s->block_max_depth;
 774     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;
 775     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;
 776     const uint8_t *obmc  = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
 777     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
 778     const int ref_stride= s->current_picture.linesize[plane_index];
 779     uint8_t *dst= s->current_picture.data[plane_index];
 780     uint8_t *src= s-> input_picture.data[plane_index];
 781     //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
 782     // const has only been removed from zero_dst to suppress a warning
 783     static IDWTELEM zero_dst[4096]; //FIXME
 784     const int b_stride = s->b_width << s->block_max_depth;
 785     const int w= p->width;
 786     const int h= p->height;
 787     int distortion= 0;
 788     int rate= 0;
 789     const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
 790
 791     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
 792
 793     for(i=0; i<9; i++){
 794         int mb_x2= mb_x + (i%3) - 1;
 795         int mb_y2= mb_y + (i/3) - 1;
 796         int x= block_w*mb_x2 + block_w/2;
 797         int y= block_h*mb_y2 + block_h/2;
 798
 799         add_yblock(s, 0, NULL, zero_dst, dst, obmc,
 800                    x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
 801
 802         //FIXME find a cleaner/simpler way to skip the outside stuff
 803         for(y2= y; y2<0; y2++)
 804             memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
 805         for(y2= h; y2<y+block_h; y2++)
 806             memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
 807         if(x<0){
 808             for(y2= y; y2<y+block_h; y2++)
 809                 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
 810         }
 811         if(x+block_w > w){
 812             for(y2= y; y2<y+block_h; y2++)
 813                 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
 814         }
 815
 816         assert(block_w== 8 || block_w==16);
 817         distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
 818     }
 819
 820     if(plane_index==0){
 821         BlockNode *b= &s->block[mb_x+mb_y*b_stride];
 822         int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
 823
 824 /* ..RRRr
 825  * .RXXx.
 826  * .RXXx.
 827  * rxxx.
 828  */
 829         if(merged)
 830             rate = get_block_bits(s, mb_x, mb_y, 2);
 831         for(i=merged?4:0; i<9; i++){
 832             static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
 833             rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
 834         }
 835     }
 836     return distortion + rate*penalty_factor;
 837 }
 838
 839 static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
 840     const int w= b->width;
 841     const int h= b->height;
 842     int x, y;
 843
 844     if(1){
 845         int run=0;
 846         int run_index=0;
 847         int max_index;
 848
 849         for(y=0; y<h; y++){
 850             for(x=0; x<w; x++){
 851                 int v, p=0;
 852                 int /*ll=0, */l=0, lt=0, t=0, rt=0;
 853                 v= src[x + y*stride];
 854
 855                 if(y){
 856                     t= src[x + (y-1)*stride];
 857                     if(x){
 858                         lt= src[x - 1 + (y-1)*stride];
 859                     }
 860                     if(x + 1 < w){
 861                         rt= src[x + 1 + (y-1)*stride];
 862                     }
 863                 }
 864                 if(x){
 865                     l= src[x - 1 + y*stride];
 866                     /*if(x > 1){
 867                         if(orientation==1) ll= src[y + (x-2)*stride];
 868                         else               ll= src[x - 2 + y*stride];
 869                     }*/
 870                 }
 871                 if(parent){
 872                     int px= x>>1;
 873                     int py= y>>1;
 874                     if(px<b->parent->width && py<b->parent->height)
 875                         p= parent[px + py*2*stride];
 876                 }
 877                 if(!(/*ll|*/l|lt|t|rt|p)){
 878                     if(v){
 879                         s->runs[run_index++]= run;
 880                         run=0;
 881                     }else{
 882                         run++;
 883                     }
 884                 }
 885             }
 886         }
 887         max_index= run_index;
 888         s->runs[run_index++]= run;
 889         run_index=0;
 890         run= s->runs[run_index++];
 891
 892         put_symbol2(&s->c, b->state[30], max_index, 0);
 893         if(run_index <= max_index)
 894             put_symbol2(&s->c, b->state[1], run, 3);
 895
 896         for(y=0; y<h; y++){
 897             if(s->c.bytestream_end - s->c.bytestream < w*40){
 898                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 899                 return -1;
 900             }
 901             for(x=0; x<w; x++){
 902                 int v, p=0;
 903                 int /*ll=0, */l=0, lt=0, t=0, rt=0;
 904                 v= src[x + y*stride];
 905
 906                 if(y){
 907                     t= src[x + (y-1)*stride];
 908                     if(x){
 909                         lt= src[x - 1 + (y-1)*stride];
 910                     }
 911                     if(x + 1 < w){
 912                         rt= src[x + 1 + (y-1)*stride];
 913                     }
 914                 }
 915                 if(x){
 916                     l= src[x - 1 + y*stride];
 917                     /*if(x > 1){
 918                         if(orientation==1) ll= src[y + (x-2)*stride];
 919                         else               ll= src[x - 2 + y*stride];
 920                     }*/
 921                 }
 922                 if(parent){
 923                     int px= x>>1;
 924                     int py= y>>1;
 925                     if(px<b->parent->width && py<b->parent->height)
 926                         p= parent[px + py*2*stride];
 927                 }
 928                 if(/*ll|*/l|lt|t|rt|p){
 929                     int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
 930
 931                     put_rac(&s->c, &b->state[0][context], !!v);
 932                 }else{
 933                     if(!run){
 934                         run= s->runs[run_index++];
 935
 936                         if(run_index <= max_index)
 937                             put_symbol2(&s->c, b->state[1], run, 3);
 938                         assert(v);
 939                     }else{
 940                         run--;
 941                         assert(!v);
 942                     }
 943                 }
 944                 if(v){
 945                     int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
 946                     int l2= 2*FFABS(l) + (l<0);
 947                     int t2= 2*FFABS(t) + (t<0);
 948
 949                     put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
 950                     put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
 951                 }
 952             }
 953         }
 954     }
 955     return 0;
 956 }
 957
 958 static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
 959 //    encode_subband_qtree(s, b, src, parent, stride, orientation);
 960 //    encode_subband_z0run(s, b, src, parent, stride, orientation);
 961     return encode_subband_c0run(s, b, src, parent, stride, orientation);
 962 //    encode_subband_dzr(s, b, src, parent, stride, orientation);
 963 }
 964
 965 static av_always_inline int check_block(SnowContext *s, int mb_x, int mb_y, int p[3], int intra, const uint8_t *obmc_edged, int *best_rd){
 966     const int b_stride= s->b_width << s->block_max_depth;
 967     BlockNode *block= &s->block[mb_x + mb_y * b_stride];
 968     BlockNode backup= *block;
 969     unsigned value;
 970     int rd, index;
 971
 972     assert(mb_x>=0 && mb_y>=0);
 973     assert(mb_x<b_stride);
 974
 975     if(intra){
 976         block->color[0] = p[0];
 977         block->color[1] = p[1];
 978         block->color[2] = p[2];
 979         block->type |= BLOCK_INTRA;
 980     }else{
 981         index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
 982         value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
 983         if(s->me_cache[index] == value)
 984             return 0;
 985         s->me_cache[index]= value;
 986
 987         block->mx= p[0];
 988         block->my= p[1];
 989         block->type &= ~BLOCK_INTRA;
 990     }
 991
 992     rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
 993
 994 //FIXME chroma
 995     if(rd < *best_rd){
 996         *best_rd= rd;
 997         return 1;
 998     }else{
 999         *block= backup;
1000         return 0;
1001     }
1002 }
1003
1004 /* special case for int[2] args we discard afterwards,
1005  * fixes compilation problem with gcc 2.95 */
1006 static av_always_inline int check_block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, const uint8_t *obmc_edged, int *best_rd){
1007     int p[2] = {p0, p1};
1008     return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
1009 }
1010
1011 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){
1012     const int b_stride= s->b_width << s->block_max_depth;
1013     BlockNode *block= &s->block[mb_x + mb_y * b_stride];
1014     BlockNode backup[4]= {block[0], block[1], block[b_stride], block[b_stride+1]};
1015     unsigned value;
1016     int rd, index;
1017
1018     assert(mb_x>=0 && mb_y>=0);
1019     assert(mb_x<b_stride);
1020     assert(((mb_x|mb_y)&1) == 0);
1021
1022     index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
1023     value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
1024     if(s->me_cache[index] == value)
1025         return 0;
1026     s->me_cache[index]= value;
1027
1028     block->mx= p0;
1029     block->my= p1;
1030     block->ref= ref;
1031     block->type &= ~BLOCK_INTRA;
1032     block[1]= block[b_stride]= block[b_stride+1]= *block;
1033
1034     rd= get_4block_rd(s, mb_x, mb_y, 0);
1035
1036 //FIXME chroma
1037     if(rd < *best_rd){
1038         *best_rd= rd;
1039         return 1;
1040     }else{
1041         block[0]= backup[0];
1042         block[1]= backup[1];
1043         block[b_stride]= backup[2];
1044         block[b_stride+1]= backup[3];
1045         return 0;
1046     }
1047 }
1048
1049 static void iterative_me(SnowContext *s){
1050     int pass, mb_x, mb_y;
1051     const int b_width = s->b_width  << s->block_max_depth;
1052     const int b_height= s->b_height << s->block_max_depth;
1053     const int b_stride= b_width;
1054     int color[3];
1055
1056     {
1057         RangeCoder r = s->c;
1058         uint8_t state[sizeof(s->block_state)];
1059         memcpy(state, s->block_state, sizeof(s->block_state));
1060         for(mb_y= 0; mb_y<s->b_height; mb_y++)
1061             for(mb_x= 0; mb_x<s->b_width; mb_x++)
1062                 encode_q_branch(s, 0, mb_x, mb_y);
1063         s->c = r;
1064         memcpy(s->block_state, state, sizeof(s->block_state));
1065     }
1066
1067     for(pass=0; pass<25; pass++){
1068         int change= 0;
1069
1070         for(mb_y= 0; mb_y<b_height; mb_y++){
1071             for(mb_x= 0; mb_x<b_width; mb_x++){
1072                 int dia_change, i, j, ref;
1073                 int best_rd= INT_MAX, ref_rd;
1074                 BlockNode backup, ref_b;
1075                 const int index= mb_x + mb_y * b_stride;
1076                 BlockNode *block= &s->block[index];
1077                 BlockNode *tb =                   mb_y            ? &s->block[index-b_stride  ] : NULL;
1078                 BlockNode *lb = mb_x                              ? &s->block[index         -1] : NULL;
1079                 BlockNode *rb = mb_x+1<b_width                    ? &s->block[index         +1] : NULL;
1080                 BlockNode *bb =                   mb_y+1<b_height ? &s->block[index+b_stride  ] : NULL;
1081                 BlockNode *tlb= mb_x           && mb_y            ? &s->block[index-b_stride-1] : NULL;
1082                 BlockNode *trb= mb_x+1<b_width && mb_y            ? &s->block[index-b_stride+1] : NULL;
1083                 BlockNode *blb= mb_x           && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
1084                 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
1085                 const int b_w= (MB_SIZE >> s->block_max_depth);
1086                 uint8_t obmc_edged[b_w*2][b_w*2];
1087
1088                 if(pass && (block->type & BLOCK_OPT))
1089                     continue;
1090                 block->type |= BLOCK_OPT;
1091
1092                 backup= *block;
1093
1094                 if(!s->me_cache_generation)
1095                     memset(s->me_cache, 0, sizeof(s->me_cache));
1096                 s->me_cache_generation += 1<<22;
1097
1098                 //FIXME precalculate
1099                 {
1100                     int x, y;
1101                     memcpy(obmc_edged, ff_obmc_tab[s->block_max_depth], b_w*b_w*4);
1102                     if(mb_x==0)
1103                         for(y=0; y<b_w*2; y++)
1104                             memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
1105                     if(mb_x==b_stride-1)
1106                         for(y=0; y<b_w*2; y++)
1107                             memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
1108                     if(mb_y==0){
1109                         for(x=0; x<b_w*2; x++)
1110                             obmc_edged[0][x] += obmc_edged[b_w-1][x];
1111                         for(y=1; y<b_w; y++)
1112                             memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
1113                     }
1114                     if(mb_y==b_height-1){
1115                         for(x=0; x<b_w*2; x++)
1116                             obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
1117                         for(y=b_w; y<b_w*2-1; y++)
1118                             memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
1119                     }
1120                 }
1121
1122                 //skip stuff outside the picture
1123                 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
1124                     uint8_t *src= s->  input_picture.data[0];
1125                     uint8_t *dst= s->current_picture.data[0];
1126                     const int stride= s->current_picture.linesize[0];
1127                     const int block_w= MB_SIZE >> s->block_max_depth;
1128                     const int block_h= MB_SIZE >> s->block_max_depth;
1129                     const int sx= block_w*mb_x - block_w/2;
1130                     const int sy= block_h*mb_y - block_h/2;
1131                     const int w= s->plane[0].width;
1132                     const int h= s->plane[0].height;
1133                     int y;
1134
1135                     for(y=sy; y<0; y++)
1136                         memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1137                     for(y=h; y<sy+block_h*2; y++)
1138                         memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
1139                     if(sx<0){
1140                         for(y=sy; y<sy+block_h*2; y++)
1141                             memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
1142                     }
1143                     if(sx+block_w*2 > w){
1144                         for(y=sy; y<sy+block_h*2; y++)
1145                             memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
1146                     }
1147                 }
1148
1149                 // intra(black) = neighbors' contribution to the current block
1150                 for(i=0; i<3; i++)
1151                     color[i]= get_dc(s, mb_x, mb_y, i);
1152
1153                 // get previous score (cannot be cached due to OBMC)
1154                 if(pass > 0 && (block->type&BLOCK_INTRA)){
1155                     int color0[3]= {block->color[0], block->color[1], block->color[2]};
1156                     check_block(s, mb_x, mb_y, color0, 1, *obmc_edged, &best_rd);
1157                 }else
1158                     check_block_inter(s, mb_x, mb_y, block->mx, block->my, *obmc_edged, &best_rd);
1159
1160                 ref_b= *block;
1161                 ref_rd= best_rd;
1162                 for(ref=0; ref < s->ref_frames; ref++){
1163                     int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
1164                     if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
1165                         continue;
1166                     block->ref= ref;
1167                     best_rd= INT_MAX;
1168
1169                     check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], *obmc_edged, &best_rd);
1170                     check_block_inter(s, mb_x, mb_y, 0, 0, *obmc_edged, &best_rd);
1171                     if(tb)
1172                         check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], *obmc_edged, &best_rd);
1173                     if(lb)
1174                         check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], *obmc_edged, &best_rd);
1175                     if(rb)
1176                         check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], *obmc_edged, &best_rd);
1177                     if(bb)
1178                         check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], *obmc_edged, &best_rd);
1179
1180                     /* fullpel ME */
1181                     //FIXME avoid subpel interpolation / round to nearest integer
1182                     do{
1183                         dia_change=0;
1184                         for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
1185                             for(j=0; j<i; j++){
1186                                 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
1187                                 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
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                             }
1191                         }
1192                     }while(dia_change);
1193                     /* subpel ME */
1194                     do{
1195                         static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
1196                         dia_change=0;
1197                         for(i=0; i<8; i++)
1198                             dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], *obmc_edged, &best_rd);
1199                     }while(dia_change);
1200                     //FIXME or try the standard 2 pass qpel or similar
1201
1202                     mvr[0][0]= block->mx;
1203                     mvr[0][1]= block->my;
1204                     if(ref_rd > best_rd){
1205                         ref_rd= best_rd;
1206                         ref_b= *block;
1207                     }
1208                 }
1209                 best_rd= ref_rd;
1210                 *block= ref_b;
1211                 check_block(s, mb_x, mb_y, color, 1, *obmc_edged, &best_rd);
1212                 //FIXME RD style color selection
1213                 if(!same_block(block, &backup)){
1214                     if(tb ) tb ->type &= ~BLOCK_OPT;
1215                     if(lb ) lb ->type &= ~BLOCK_OPT;
1216                     if(rb ) rb ->type &= ~BLOCK_OPT;
1217                     if(bb ) bb ->type &= ~BLOCK_OPT;
1218                     if(tlb) tlb->type &= ~BLOCK_OPT;
1219                     if(trb) trb->type &= ~BLOCK_OPT;
1220                     if(blb) blb->type &= ~BLOCK_OPT;
1221                     if(brb) brb->type &= ~BLOCK_OPT;
1222                     change ++;
1223                 }
1224             }
1225         }
1226         av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
1227         if(!change)
1228             break;
1229     }
1230
1231     if(s->block_max_depth == 1){
1232         int change= 0;
1233         for(mb_y= 0; mb_y<b_height; mb_y+=2){
1234             for(mb_x= 0; mb_x<b_width; mb_x+=2){
1235                 int i;
1236                 int best_rd, init_rd;
1237                 const int index= mb_x + mb_y * b_stride;
1238                 BlockNode *b[4];
1239
1240                 b[0]= &s->block[index];
1241                 b[1]= b[0]+1;
1242                 b[2]= b[0]+b_stride;
1243                 b[3]= b[2]+1;
1244                 if(same_block(b[0], b[1]) &&
1245                    same_block(b[0], b[2]) &&
1246                    same_block(b[0], b[3]))
1247                     continue;
1248
1249                 if(!s->me_cache_generation)
1250                     memset(s->me_cache, 0, sizeof(s->me_cache));
1251                 s->me_cache_generation += 1<<22;
1252
1253                 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
1254
1255                 //FIXME more multiref search?
1256                 check_4block_inter(s, mb_x, mb_y,
1257                                    (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
1258                                    (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
1259
1260                 for(i=0; i<4; i++)
1261                     if(!(b[i]->type&BLOCK_INTRA))
1262                         check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
1263
1264                 if(init_rd != best_rd)
1265                     change++;
1266             }
1267         }
1268         av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
1269     }
1270 }
1271
1272 static void encode_blocks(SnowContext *s, int search){
1273     int x, y;
1274     int w= s->b_width;
1275     int h= s->b_height;
1276
1277     if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
1278         iterative_me(s);
1279
1280     for(y=0; y<h; y++){
1281         if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
1282             av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
1283             return;
1284         }
1285         for(x=0; x<w; x++){
1286             if(s->avctx->me_method == ME_ITER || !search)
1287                 encode_q_branch2(s, 0, x, y);
1288             else
1289                 encode_q_branch (s, 0, x, y);
1290         }
1291     }
1292 }
1293
1294 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
1295     const int w= b->width;
1296     const int h= b->height;
1297     const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1298     const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
1299     int x,y, thres1, thres2;
1300
1301     if(s->qlog == LOSSLESS_QLOG){
1302         for(y=0; y<h; y++)
1303             for(x=0; x<w; x++)
1304                 dst[x + y*stride]= src[x + y*stride];
1305         return;
1306     }
1307
1308     bias= bias ? 0 : (3*qmul)>>3;
1309     thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1310     thres2= 2*thres1;
1311
1312     if(!bias){
1313         for(y=0; y<h; y++){
1314             for(x=0; x<w; x++){
1315                 int i= src[x + y*stride];
1316
1317                 if((unsigned)(i+thres1) > thres2){
1318                     if(i>=0){
1319                         i<<= QEXPSHIFT;
1320                         i/= qmul; //FIXME optimize
1321                         dst[x + y*stride]=  i;
1322                     }else{
1323                         i= -i;
1324                         i<<= QEXPSHIFT;
1325                         i/= qmul; //FIXME optimize
1326                         dst[x + y*stride]= -i;
1327                     }
1328                 }else
1329                     dst[x + y*stride]= 0;
1330             }
1331         }
1332     }else{
1333         for(y=0; y<h; y++){
1334             for(x=0; x<w; x++){
1335                 int i= src[x + y*stride];
1336
1337                 if((unsigned)(i+thres1) > thres2){
1338                     if(i>=0){
1339                         i<<= QEXPSHIFT;
1340                         i= (i + bias) / qmul; //FIXME optimize
1341                         dst[x + y*stride]=  i;
1342                     }else{
1343                         i= -i;
1344                         i<<= QEXPSHIFT;
1345                         i= (i + bias) / qmul; //FIXME optimize
1346                         dst[x + y*stride]= -i;
1347                     }
1348                 }else
1349                     dst[x + y*stride]= 0;
1350             }
1351         }
1352     }
1353 }
1354
1355 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
1356     const int w= b->width;
1357     const int h= b->height;
1358     const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
1359     const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1360     const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1361     int x,y;
1362
1363     if(s->qlog == LOSSLESS_QLOG) return;
1364
1365     for(y=0; y<h; y++){
1366         for(x=0; x<w; x++){
1367             int i= src[x + y*stride];
1368             if(i<0){
1369                 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1370             }else if(i>0){
1371                 src[x + y*stride]=  (( i*qmul + qadd)>>(QEXPSHIFT));
1372             }
1373         }
1374     }
1375 }
1376
1377 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1378     const int w= b->width;
1379     const int h= b->height;
1380     int x,y;
1381
1382     for(y=h-1; y>=0; y--){
1383         for(x=w-1; x>=0; x--){
1384             int i= x + y*stride;
1385
1386             if(x){
1387                 if(use_median){
1388                     if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1389                     else  src[i] -= src[i - 1];
1390                 }else{
1391                     if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1392                     else  src[i] -= src[i - 1];
1393                 }
1394             }else{
1395                 if(y) src[i] -= src[i - stride];
1396             }
1397         }
1398     }
1399 }
1400
1401 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
1402     const int w= b->width;
1403     const int h= b->height;
1404     int x,y;
1405
1406     for(y=0; y<h; y++){
1407         for(x=0; x<w; x++){
1408             int i= x + y*stride;
1409
1410             if(x){
1411                 if(use_median){
1412                     if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1413                     else  src[i] += src[i - 1];
1414                 }else{
1415                     if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1416                     else  src[i] += src[i - 1];
1417                 }
1418             }else{
1419                 if(y) src[i] += src[i - stride];
1420             }
1421         }
1422     }
1423 }
1424
1425 static void encode_qlogs(SnowContext *s){
1426     int plane_index, level, orientation;
1427
1428     for(plane_index=0; plane_index<2; plane_index++){
1429         for(level=0; level<s->spatial_decomposition_count; level++){
1430             for(orientation=level ? 1:0; orientation<4; orientation++){
1431                 if(orientation==2) continue;
1432                 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1433             }
1434         }
1435     }
1436 }
1437
1438 static void encode_header(SnowContext *s){
1439     int plane_index, i;
1440     uint8_t kstate[32];
1441
1442     memset(kstate, MID_STATE, sizeof(kstate));
1443
1444     put_rac(&s->c, kstate, s->keyframe);
1445     if(s->keyframe || s->always_reset){
1446         ff_snow_reset_contexts(s);
1447         s->last_spatial_decomposition_type=
1448         s->last_qlog=
1449         s->last_qbias=
1450         s->last_mv_scale=
1451         s->last_block_max_depth= 0;
1452         for(plane_index=0; plane_index<2; plane_index++){
1453             Plane *p= &s->plane[plane_index];
1454             p->last_htaps=0;
1455             p->last_diag_mc=0;
1456             memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
1457         }
1458     }
1459     if(s->keyframe){
1460         put_symbol(&s->c, s->header_state, s->version, 0);
1461         put_rac(&s->c, s->header_state, s->always_reset);
1462         put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1463         put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1464         put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1465         put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1466         put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1467         put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1468         put_rac(&s->c, s->header_state, s->spatial_scalability);
1469 //        put_rac(&s->c, s->header_state, s->rate_scalability);
1470         put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
1471
1472         encode_qlogs(s);
1473     }
1474
1475     if(!s->keyframe){
1476         int update_mc=0;
1477         for(plane_index=0; plane_index<2; plane_index++){
1478             Plane *p= &s->plane[plane_index];
1479             update_mc |= p->last_htaps   != p->htaps;
1480             update_mc |= p->last_diag_mc != p->diag_mc;
1481             update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1482         }
1483         put_rac(&s->c, s->header_state, update_mc);
1484         if(update_mc){
1485             for(plane_index=0; plane_index<2; plane_index++){
1486                 Plane *p= &s->plane[plane_index];
1487                 put_rac(&s->c, s->header_state, p->diag_mc);
1488                 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
1489                 for(i= p->htaps/2; i; i--)
1490                     put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
1491             }
1492         }
1493         if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
1494             put_rac(&s->c, s->header_state, 1);
1495             put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1496             encode_qlogs(s);
1497         }else
1498             put_rac(&s->c, s->header_state, 0);
1499     }
1500
1501     put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
1502     put_symbol(&s->c, s->header_state, s->qlog            - s->last_qlog    , 1);
1503     put_symbol(&s->c, s->header_state, s->mv_scale        - s->last_mv_scale, 1);
1504     put_symbol(&s->c, s->header_state, s->qbias           - s->last_qbias   , 1);
1505     put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
1506
1507 }
1508
1509 static void update_last_header_values(SnowContext *s){
1510     int plane_index;
1511
1512     if(!s->keyframe){
1513         for(plane_index=0; plane_index<2; plane_index++){
1514             Plane *p= &s->plane[plane_index];
1515             p->last_diag_mc= p->diag_mc;
1516             p->last_htaps  = p->htaps;
1517             memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
1518         }
1519     }
1520
1521     s->last_spatial_decomposition_type  = s->spatial_decomposition_type;
1522     s->last_qlog                        = s->qlog;
1523     s->last_qbias                       = s->qbias;
1524     s->last_mv_scale                    = s->mv_scale;
1525     s->last_block_max_depth             = s->block_max_depth;
1526     s->last_spatial_decomposition_count = s->spatial_decomposition_count;
1527 }
1528
1529 static int qscale2qlog(int qscale){
1530     return rint(QROOT*log(qscale / (float)FF_QP2LAMBDA)/log(2))
1531            + 61*QROOT/8; ///< 64 > 60
1532 }
1533
1534 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
1535 {
1536     /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
1537      * FIXME we know exact mv bits at this point,
1538      * but ratecontrol isn't set up to include them. */
1539     uint32_t coef_sum= 0;
1540     int level, orientation, delta_qlog;
1541
1542     for(level=0; level<s->spatial_decomposition_count; level++){
1543         for(orientation=level ? 1 : 0; orientation<4; orientation++){
1544             SubBand *b= &s->plane[0].band[level][orientation];
1545             IDWTELEM *buf= b->ibuf;
1546             const int w= b->width;
1547             const int h= b->height;
1548             const int stride= b->stride;
1549             const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
1550             const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
1551             const int qdiv= (1<<16)/qmul;
1552             int x, y;
1553             //FIXME this is ugly
1554             for(y=0; y<h; y++)
1555                 for(x=0; x<w; x++)
1556                     buf[x+y*stride]= b->buf[x+y*stride];
1557             if(orientation==0)
1558                 decorrelate(s, b, buf, stride, 1, 0);
1559             for(y=0; y<h; y++)
1560                 for(x=0; x<w; x++)
1561                     coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
1562         }
1563     }
1564
1565     /* ugly, ratecontrol just takes a sqrt again */
1566     coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
1567     assert(coef_sum < INT_MAX);
1568
1569     if(pict->pict_type == AV_PICTURE_TYPE_I){
1570         s->m.current_picture.mb_var_sum= coef_sum;
1571         s->m.current_picture.mc_mb_var_sum= 0;
1572     }else{
1573         s->m.current_picture.mc_mb_var_sum= coef_sum;
1574         s->m.current_picture.mb_var_sum= 0;
1575     }
1576
1577     pict->quality= ff_rate_estimate_qscale(&s->m, 1);
1578     if (pict->quality < 0)
1579         return INT_MIN;
1580     s->lambda= pict->quality * 3/2;
1581     delta_qlog= qscale2qlog(pict->quality) - s->qlog;
1582     s->qlog+= delta_qlog;
1583     return delta_qlog;
1584 }
1585
1586 static void calculate_visual_weight(SnowContext *s, Plane *p){
1587     int width = p->width;
1588     int height= p->height;
1589     int level, orientation, x, y;
1590
1591     for(level=0; level<s->spatial_decomposition_count; level++){
1592         for(orientation=level ? 1 : 0; orientation<4; orientation++){
1593             SubBand *b= &p->band[level][orientation];
1594             IDWTELEM *ibuf= b->ibuf;
1595             int64_t error=0;
1596
1597             memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
1598             ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
1599             ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
1600             for(y=0; y<height; y++){
1601                 for(x=0; x<width; x++){
1602                     int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
1603                     error += d*d;
1604                 }
1605             }
1606
1607             b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
1608         }
1609     }
1610 }
1611
1612 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1613                         const AVFrame *pict, int *got_packet)
1614 {
1615     SnowContext *s = avctx->priv_data;
1616     RangeCoder * const c= &s->c;
1617     AVFrame *pic = &s->new_picture;
1618     const int width= s->avctx->width;
1619     const int height= s->avctx->height;
1620     int level, orientation, plane_index, i, y, ret;
1621     uint8_t rc_header_bak[sizeof(s->header_state)];
1622     uint8_t rc_block_bak[sizeof(s->block_state)];
1623
1624     if ((ret = ff_alloc_packet2(avctx, pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + FF_MIN_BUFFER_SIZE)) < 0)
1625         return ret;
1626
1627     ff_init_range_encoder(c, pkt->data, pkt->size);
1628     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1629
1630     for(i=0; i<3; i++){
1631         int hshift= i ? s->chroma_h_shift : 0;
1632         int vshift= i ? s->chroma_v_shift : 0;
1633         for(y=0; y<(height>>vshift); y++)
1634             memcpy(&s->input_picture.data[i][y * s->input_picture.linesize[i]],
1635                    &pict->data[i][y * pict->linesize[i]],
1636                    width>>hshift);
1637     }
1638     s->new_picture = *pict;
1639
1640     s->m.picture_number= avctx->frame_number;
1641     if(avctx->flags&CODEC_FLAG_PASS2){
1642         s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;
1643         s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
1644         if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
1645             pic->quality = ff_rate_estimate_qscale(&s->m, 0);
1646             if (pic->quality < 0)
1647                 return -1;
1648         }
1649     }else{
1650         s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
1651         s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1652     }
1653
1654     if(s->pass1_rc && avctx->frame_number == 0)
1655         pic->quality = 2*FF_QP2LAMBDA;
1656     if (pic->quality) {
1657         s->qlog   = qscale2qlog(pic->quality);
1658         s->lambda = pic->quality * 3/2;
1659     }
1660     if (s->qlog < 0 || (!pic->quality && (avctx->flags & CODEC_FLAG_QSCALE))) {
1661         s->qlog= LOSSLESS_QLOG;
1662         s->lambda = 0;
1663     }//else keep previous frame's qlog until after motion estimation
1664
1665     ff_snow_frame_start(s);
1666
1667     s->m.current_picture_ptr= &s->m.current_picture;
1668     s->m.last_picture.f.pts = s->m.current_picture.f.pts;
1669     s->m.current_picture.f.pts = pict->pts;
1670     if(pic->pict_type == AV_PICTURE_TYPE_P){
1671         int block_width = (width +15)>>4;
1672         int block_height= (height+15)>>4;
1673         int stride= s->current_picture.linesize[0];
1674
1675         assert(s->current_picture.data[0]);
1676         assert(s->last_picture[0].data[0]);
1677
1678         s->m.avctx= s->avctx;
1679         s->m.current_picture.f.data[0] = s->current_picture.data[0];
1680         s->m.   last_picture.f.data[0] = s->last_picture[0].data[0];
1681         s->m.    new_picture.f.data[0] = s->  input_picture.data[0];
1682         s->m.   last_picture_ptr= &s->m.   last_picture;
1683         s->m.linesize=
1684         s->m.   last_picture.f.linesize[0] =
1685         s->m.    new_picture.f.linesize[0] =
1686         s->m.current_picture.f.linesize[0] = stride;
1687         s->m.uvlinesize= s->current_picture.linesize[1];
1688         s->m.width = width;
1689         s->m.height= height;
1690         s->m.mb_width = block_width;
1691         s->m.mb_height= block_height;
1692         s->m.mb_stride=   s->m.mb_width+1;
1693         s->m.b8_stride= 2*s->m.mb_width+1;
1694         s->m.f_code=1;
1695         s->m.pict_type = pic->pict_type;
1696         s->m.me_method= s->avctx->me_method;
1697         s->m.me.scene_change_score=0;
1698         s->m.flags= s->avctx->flags;
1699         s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
1700         s->m.out_format= FMT_H263;
1701         s->m.unrestricted_mv= 1;
1702
1703         s->m.lambda = s->lambda;
1704         s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
1705         s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
1706
1707         s->m.dsp= s->dsp; //move
1708         ff_init_me(&s->m);
1709         s->dsp= s->m.dsp;
1710     }
1711
1712     if(s->pass1_rc){
1713         memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
1714         memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
1715     }
1716
1717 redo_frame:
1718
1719     if (pic->pict_type == AV_PICTURE_TYPE_I)
1720         s->spatial_decomposition_count= 5;
1721     else
1722         s->spatial_decomposition_count= 5;
1723
1724     while(   !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
1725           || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
1726         s->spatial_decomposition_count--;
1727
1728     s->m.pict_type = pic->pict_type;
1729     s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
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
1762                && pic->pict_type == AV_PICTURE_TYPE_P
1763                && !(avctx->flags&CODEC_FLAG_PASS2)
1764                && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
1765                 ff_init_range_encoder(c, pkt->data, pkt->size);
1766                 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
1767                 pic->pict_type= AV_PICTURE_TYPE_I;
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*/
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                     if(!QUANTIZE2)
1811                         quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
1812                     if(orientation==0)
1813                         decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
1814                     if (!s->no_bitstream)
1815                     encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
1816                     assert(b->parent==NULL || b->parent->stride == b->stride*2);
1817                     if(orientation==0)
1818                         correlate(s, b, b->ibuf, b->stride, 1, 0);
1819                 }
1820             }
1821
1822             for(level=0; level<s->spatial_decomposition_count; level++){
1823                 for(orientation=level ? 1 : 0; orientation<4; orientation++){
1824                     SubBand *b= &p->band[level][orientation];
1825
1826                     dequantize(s, b, b->ibuf, b->stride);
1827                 }
1828             }
1829
1830             ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
1831             if(s->qlog == LOSSLESS_QLOG){
1832                 for(y=0; y<h; y++){
1833                     for(x=0; x<w; x++){
1834                         s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
1835                     }
1836                 }
1837             }
1838             predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1839         }else{
1840             //ME/MC only
1841             if(pic->pict_type == AV_PICTURE_TYPE_I){
1842                 for(y=0; y<h; y++){
1843                     for(x=0; x<w; x++){
1844                         s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x]=
1845                             pict->data[plane_index][y*pict->linesize[plane_index] + x];
1846                     }
1847                 }
1848             }else{
1849                 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
1850                 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
1851             }
1852         }
1853         if(s->avctx->flags&CODEC_FLAG_PSNR){
1854             int64_t error= 0;
1855
1856             if(pict->data[plane_index]) //FIXME gray hack
1857                 for(y=0; y<h; y++){
1858                     for(x=0; x<w; x++){
1859                         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];
1860                         error += d*d;
1861                     }
1862                 }
1863             s->avctx->error[plane_index] += error;
1864             s->current_picture.error[plane_index] = error;
1865         }
1866
1867     }
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 = pict->pict_type;
1875     s->current_picture.quality = pict->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&CODEC_FLAG_PASS1)
1886         ff_write_pass1_stats(&s->m);
1887     s->m.last_pict_type = s->m.pict_type;
1888     avctx->frame_bits = s->m.frame_bits;
1889     avctx->mv_bits = s->m.mv_bits;
1890     avctx->misc_bits = s->m.misc_bits;
1891     avctx->p_tex_bits = s->m.p_tex_bits;
1892
1893     emms_c();
1894
1895     pkt->size = ff_rac_terminate(c);
1896     if (avctx->coded_frame->key_frame)
1897         pkt->flags |= AV_PKT_FLAG_KEY;
1898     *got_packet = 1;
1899
1900     return 0;
1901 }
1902
1903 static av_cold int encode_end(AVCodecContext *avctx)
1904 {
1905     SnowContext *s = avctx->priv_data;
1906
1907     ff_snow_common_end(s);
1908     if (s->input_picture.data[0])
1909         avctx->release_buffer(avctx, &s->input_picture);
1910     av_free(avctx->stats_out);
1911     av_freep(&s->runs);
1912
1913     return 0;
1914 }
1915
1916 #define OFFSET(x) offsetof(SnowContext, x)
1917 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1918 static const AVOption options[] = {
1919     { "memc_only",      "Only do ME/MC (I frames -> ref, P frame -> ME+MC).",   OFFSET(memc_only), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
1920     { "no_bitstream",   "Skip final bitstream writeout.",                    OFFSET(no_bitstream), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
1921     { NULL },
1922 };
1923
1924 static const AVClass snowenc_class = {
1925     .class_name = "snow encoder",
1926     .item_name  = av_default_item_name,
1927     .option     = options,
1928     .version    = LIBAVUTIL_VERSION_INT,
1929 };
1930
1931 AVCodec ff_snow_encoder = {
1932     .name           = "snow",
1933     .type           = AVMEDIA_TYPE_VIDEO,
1934     .id             = CODEC_ID_SNOW,
1935     .priv_data_size = sizeof(SnowContext),
1936     .init           = encode_init,
1937     .encode2        = encode_frame,
1938     .close          = encode_end,
1939     .long_name      = NULL_IF_CONFIG_SMALL("Snow"),
1940     .priv_class     = &snowenc_class,
1941 };
1942
1943
1944 #ifdef TEST
1945 #undef malloc
1946 #undef free
1947 #undef printf
1948
1949 #include "libavutil/lfg.h"
1950 #include "libavutil/mathematics.h"
1951
1952 int main(void){
1953     int width=256;
1954     int height=256;
1955     int buffer[2][width*height];
1956     SnowContext s;
1957     int i;
1958     AVLFG prng;
1959     s.spatial_decomposition_count=6;
1960     s.spatial_decomposition_type=1;
1961
1962     s.temp_dwt_buffer  = av_mallocz(width * sizeof(DWTELEM));
1963     s.temp_idwt_buffer = av_mallocz(width * sizeof(IDWTELEM));
1964
1965     av_lfg_init(&prng, 1);
1966
1967     printf("testing 5/3 DWT\n");
1968     for(i=0; i<width*height; i++)
1969         buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1970
1971     ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1972     ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1973
1974     for(i=0; i<width*height; i++)
1975         if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1976
1977     printf("testing 9/7 DWT\n");
1978     s.spatial_decomposition_type=0;
1979     for(i=0; i<width*height; i++)
1980         buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
1981
1982     ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1983     ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
1984
1985     for(i=0; i<width*height; i++)
1986         if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
1987
1988     {
1989     int level, orientation, x, y;
1990     int64_t errors[8][4];
1991     int64_t g=0;
1992
1993         memset(errors, 0, sizeof(errors));
1994         s.spatial_decomposition_count=3;
1995         s.spatial_decomposition_type=0;
1996         for(level=0; level<s.spatial_decomposition_count; level++){
1997             for(orientation=level ? 1 : 0; orientation<4; orientation++){
1998                 int w= width  >> (s.spatial_decomposition_count-level);
1999                 int h= height >> (s.spatial_decomposition_count-level);
2000                 int stride= width  << (s.spatial_decomposition_count-level);
2001                 DWTELEM *buf= buffer[0];
2002                 int64_t error=0;
2003
2004                 if(orientation&1) buf+=w;
2005                 if(orientation>1) buf+=stride>>1;
2006
2007                 memset(buffer[0], 0, sizeof(int)*width*height);
2008                 buf[w/2 + h/2*stride]= 256*256;
2009                 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2010                 for(y=0; y<height; y++){
2011                     for(x=0; x<width; x++){
2012                         int64_t d= buffer[0][x + y*width];
2013                         error += d*d;
2014                         if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);
2015                     }
2016                     if(FFABS(height/2-y)<9 && level==2) printf("\n");
2017                 }
2018                 error= (int)(sqrt(error)+0.5);
2019                 errors[level][orientation]= error;
2020                 if(g) g=av_gcd(g, error);
2021                 else g= error;
2022             }
2023         }
2024         printf("static int const visual_weight[][4]={\n");
2025         for(level=0; level<s.spatial_decomposition_count; level++){
2026             printf("  {");
2027             for(orientation=0; orientation<4; orientation++){
2028                 printf("%8"PRId64",", errors[level][orientation]/g);
2029             }
2030             printf("},\n");
2031         }
2032         printf("};\n");
2033         {
2034             int level=2;
2035             int w= width  >> (s.spatial_decomposition_count-level);
2036             //int h= height >> (s.spatial_decomposition_count-level);
2037             int stride= width  << (s.spatial_decomposition_count-level);
2038             DWTELEM *buf= buffer[0];
2039             int64_t error=0;
2040
2041             buf+=w;
2042             buf+=stride>>1;
2043
2044             memset(buffer[0], 0, sizeof(int)*width*height);
2045             for(y=0; y<height; y++){
2046                 for(x=0; x<width; x++){
2047                     int tab[4]={0,2,3,1};
2048                     buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];
2049                 }
2050             }
2051             ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
2052             for(y=0; y<height; y++){
2053                 for(x=0; x<width; x++){
2054                     int64_t d= buffer[0][x + y*width];
2055                     error += d*d;
2056                     if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);
2057                 }
2058                 if(FFABS(height/2-y)<9) printf("\n");
2059             }
2060         }
2061
2062     }
2063     return 0;
2064 }
2065 #endif /* TEST */