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FFmpeg/libavcodec/snowenc.c

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  1. /*

  2.  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or

  7.  * modify it under the terms of the GNU Lesser General Public

  8.  * License as published by the Free Software Foundation; either

  9.  * version 2.1 of the License, or (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  14.  * Lesser General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU Lesser General Public

  17.  * License along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  */

  20. 

  21. #include "libavutil/intmath.h"

  22. #include "libavutil/log.h"

  23. #include "libavutil/opt.h"

  24. #include "avcodec.h"

  25. #include "internal.h"

  26. #include "snow_dwt.h"

  27. #include "snow.h"

  28. 

  29. #include "rangecoder.h"

  30. #include "mathops.h"

  31. 

  32. #include "mpegvideo.h"

  33. #include "h263.h"

  34. 

  35. #define FF_ME_ITER 50

  36. 

  37. static av_cold int encode_init(AVCodecContext *avctx)

  38. {

  39.     SnowContext *s = avctx->priv_data;

  40.     int plane_index, ret;

  41.     int i;

  42. 

  43.     if(avctx->prediction_method == DWT_97

  44.        && (avctx->flags & AV_CODEC_FLAG_QSCALE)

  45.        && avctx->global_quality == 0){

  46.         av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");

  47.         return -1;

  48.     }

  49. #if FF_API_MOTION_EST

  50. FF_DISABLE_DEPRECATION_WARNINGS

  51.     if (avctx->me_method == ME_ITER)

  52.         s->motion_est = FF_ME_ITER;

  53. FF_ENABLE_DEPRECATION_WARNINGS

  54. #endif

  55. 

  56.     s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type

  57. 

  58.     s->mv_scale       = (avctx->flags & AV_CODEC_FLAG_QPEL) ? 2 : 4;

  59.     s->block_max_depth= (avctx->flags & AV_CODEC_FLAG_4MV ) ? 1 : 0;

  60. 

  61.     for(plane_index=0; plane_index<3; plane_index++){

  62.         s->plane[plane_index].diag_mc= 1;

  63.         s->plane[plane_index].htaps= 6;

  64.         s->plane[plane_index].hcoeff[0]=  40;

  65.         s->plane[plane_index].hcoeff[1]= -10;

  66.         s->plane[plane_index].hcoeff[2]=   2;

  67.         s->plane[plane_index].fast_mc= 1;

  68.     }

  69. 

  70.     if ((ret = ff_snow_common_init(avctx)) < 0) {

  71.         return ret;

  72.     }

  73.     ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);

  74. 

  75.     ff_snow_alloc_blocks(s);

  76. 

  77.     s->version=0;

  78. 

  79.     s->m.avctx   = avctx;

  80.     s->m.bit_rate= avctx->bit_rate;

  81. 

  82.     s->m.me.temp      =

  83.     s->m.me.scratchpad= av_mallocz_array((avctx->width+64), 2*16*2*sizeof(uint8_t));

  84.     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));

  85.     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));

  86.     s->m.sc.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));

  87.     if (!s->m.me.scratchpad || !s->m.me.map || !s->m.me.score_map || !s->m.sc.obmc_scratchpad)

  88.         return AVERROR(ENOMEM);

  89. 

  90.     ff_h263_encode_init(&s->m); //mv_penalty

  91. 

  92.     s->max_ref_frames = av_clip(avctx->refs, 1, MAX_REF_FRAMES);

  93. 

  94.     if(avctx->flags&AV_CODEC_FLAG_PASS1){

  95.         if(!avctx->stats_out)

  96.             avctx->stats_out = av_mallocz(256);

  97. 

  98.         if (!avctx->stats_out)

  99.             return AVERROR(ENOMEM);

  100.     }

  101.     if((avctx->flags&AV_CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){

  102.         if(ff_rate_control_init(&s->m) < 0)

  103.             return -1;

  104.     }

  105.     s->pass1_rc= !(avctx->flags & (AV_CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));

  106. 

  107.     switch(avctx->pix_fmt){

  108.     case AV_PIX_FMT_YUV444P:

  109. //    case AV_PIX_FMT_YUV422P:

  110.     case AV_PIX_FMT_YUV420P:

  111. //    case AV_PIX_FMT_YUV411P:

  112.     case AV_PIX_FMT_YUV410P:

  113.         s->nb_planes = 3;

  114.         s->colorspace_type= 0;

  115.         break;

  116.     case AV_PIX_FMT_GRAY8:

  117.         s->nb_planes = 1;

  118.         s->colorspace_type = 1;

  119.         break;

  120. /*    case AV_PIX_FMT_RGB32:

  121.         s->colorspace= 1;

  122.         break;*/

  123.     default:

  124.         av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");

  125.         return -1;

  126.     }

  127.     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);

  128. 

  129.     ff_set_cmp(&s->mecc, s->mecc.me_cmp, s->avctx->me_cmp);

  130.     ff_set_cmp(&s->mecc, s->mecc.me_sub_cmp, s->avctx->me_sub_cmp);

  131. 

  132.     s->input_picture = av_frame_alloc();

  133.     if (!s->input_picture)

  134.         return AVERROR(ENOMEM);

  135. 

  136.     if ((ret = ff_snow_get_buffer(s, s->input_picture)) < 0)

  137.         return ret;

  138. 

  139.     if(s->motion_est == FF_ME_ITER){

  140.         int size= s->b_width * s->b_height << 2*s->block_max_depth;

  141.         for(i=0; i<s->max_ref_frames; i++){

  142.             s->ref_mvs[i]= av_mallocz_array(size, sizeof(int16_t[2]));

  143.             s->ref_scores[i]= av_mallocz_array(size, sizeof(uint32_t));

  144.             if (!s->ref_mvs[i] || !s->ref_scores[i])

  145.                 return AVERROR(ENOMEM);

  146.         }

  147.     }

  148. 

  149.     return 0;

  150. }

  151. 

  152. //near copy & paste from dsputil, FIXME

  153. static int pix_sum(uint8_t * pix, int line_size, int w, int h)

  154. {

  155.     int s, i, j;

  156. 

  157.     s = 0;

  158.     for (i = 0; i < h; i++) {

  159.         for (j = 0; j < w; j++) {

  160.             s += pix[0];

  161.             pix ++;

  162.         }

  163.         pix += line_size - w;

  164.     }

  165.     return s;

  166. }

  167. 

  168. //near copy & paste from dsputil, FIXME

  169. static int pix_norm1(uint8_t * pix, int line_size, int w)

  170. {

  171.     int s, i, j;

  172.     uint32_t *sq = ff_square_tab + 256;

  173. 

  174.     s = 0;

  175.     for (i = 0; i < w; i++) {

  176.         for (j = 0; j < w; j ++) {

  177.             s += sq[pix[0]];

  178.             pix ++;

  179.         }

  180.         pix += line_size - w;

  181.     }

  182.     return s;

  183. }

  184. 

  185. static inline int get_penalty_factor(int lambda, int lambda2, int type){

  186.     switch(type&0xFF){

  187.     default:

  188.     case FF_CMP_SAD:

  189.         return lambda>>FF_LAMBDA_SHIFT;

  190.     case FF_CMP_DCT:

  191.         return (3*lambda)>>(FF_LAMBDA_SHIFT+1);

  192.     case FF_CMP_W53:

  193.         return (4*lambda)>>(FF_LAMBDA_SHIFT);

  194.     case FF_CMP_W97:

  195.         return (2*lambda)>>(FF_LAMBDA_SHIFT);

  196.     case FF_CMP_SATD:

  197.     case FF_CMP_DCT264:

  198.         return (2*lambda)>>FF_LAMBDA_SHIFT;

  199.     case FF_CMP_RD:

  200.     case FF_CMP_PSNR:

  201.     case FF_CMP_SSE:

  202.     case FF_CMP_NSSE:

  203.         return lambda2>>FF_LAMBDA_SHIFT;

  204.     case FF_CMP_BIT:

  205.         return 1;

  206.     }

  207. }

  208. 

  209. //FIXME copy&paste

  210. #define P_LEFT P[1]

  211. #define P_TOP P[2]

  212. #define P_TOPRIGHT P[3]

  213. #define P_MEDIAN P[4]

  214. #define P_MV1 P[9]

  215. #define FLAG_QPEL   1 //must be 1

  216. 

  217. static int encode_q_branch(SnowContext *s, int level, int x, int y){

  218.     uint8_t p_buffer[1024];

  219.     uint8_t i_buffer[1024];

  220.     uint8_t p_state[sizeof(s->block_state)];

  221.     uint8_t i_state[sizeof(s->block_state)];

  222.     RangeCoder pc, ic;

  223.     uint8_t *pbbak= s->c.bytestream;

  224.     uint8_t *pbbak_start= s->c.bytestream_start;

  225.     int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;

  226.     const int w= s->b_width  << s->block_max_depth;

  227.     const int h= s->b_height << s->block_max_depth;

  228.     const int rem_depth= s->block_max_depth - level;

  229.     const int index= (x + y*w) << rem_depth;

  230.     const int block_w= 1<<(LOG2_MB_SIZE - level);

  231.     int trx= (x+1)<<rem_depth;

  232.     int try= (y+1)<<rem_depth;

  233.     const BlockNode *left  = x ? &s->block[index-1] : &null_block;

  234.     const BlockNode *top   = y ? &s->block[index-w] : &null_block;

  235.     const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;

  236.     const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;

  237.     const BlockNode *tl    = y && x ? &s->block[index-w-1] : left;

  238.     const BlockNode *tr    = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt

  239.     int pl = left->color[0];

  240.     int pcb= left->color[1];

  241.     int pcr= left->color[2];

  242.     int pmx, pmy;

  243.     int mx=0, my=0;

  244.     int l,cr,cb;

  245.     const int stride= s->current_picture->linesize[0];

  246.     const int uvstride= s->current_picture->linesize[1];

  247.     uint8_t *current_data[3]= { s->input_picture->data[0] + (x + y*  stride)*block_w,

  248.                                 s->input_picture->data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),

  249.                                 s->input_picture->data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};

  250.     int P[10][2];

  251.     int16_t last_mv[3][2];

  252.     int qpel= !!(s->avctx->flags & AV_CODEC_FLAG_QPEL); //unused

  253.     const int shift= 1+qpel;

  254.     MotionEstContext *c= &s->m.me;

  255.     int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);

  256.     int mx_context= av_log2(2*FFABS(left->mx - top->mx));

  257.     int my_context= av_log2(2*FFABS(left->my - top->my));

  258.     int s_context= 2*left->level + 2*top->level + tl->level + tr->level;

  259.     int ref, best_ref, ref_score, ref_mx, ref_my;

  260. 

  261.     av_assert0(sizeof(s->block_state) >= 256);

  262.     if(s->keyframe){

  263.         set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);

  264.         return 0;

  265.     }

  266. 

  267. //    clip predictors / edge ?

  268. 

  269.     P_LEFT[0]= left->mx;

  270.     P_LEFT[1]= left->my;

  271.     P_TOP [0]= top->mx;

  272.     P_TOP [1]= top->my;

  273.     P_TOPRIGHT[0]= tr->mx;

  274.     P_TOPRIGHT[1]= tr->my;

  275. 

  276.     last_mv[0][0]= s->block[index].mx;

  277.     last_mv[0][1]= s->block[index].my;

  278.     last_mv[1][0]= right->mx;

  279.     last_mv[1][1]= right->my;

  280.     last_mv[2][0]= bottom->mx;

  281.     last_mv[2][1]= bottom->my;

  282. 

  283.     s->m.mb_stride=2;

  284.     s->m.mb_x=

  285.     s->m.mb_y= 0;

  286.     c->skip= 0;

  287. 

  288.     av_assert1(c->  stride ==   stride);

  289.     av_assert1(c->uvstride == uvstride);

  290. 

  291.     c->penalty_factor    = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);

  292.     c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);

  293.     c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);

  294.     c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;

  295. 

  296.     c->xmin = - x*block_w - 16+3;

  297.     c->ymin = - y*block_w - 16+3;

  298.     c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;

  299.     c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;

  300. 

  301.     if(P_LEFT[0]     > (c->xmax<<shift)) P_LEFT[0]    = (c->xmax<<shift);

  302.     if(P_LEFT[1]     > (c->ymax<<shift)) P_LEFT[1]    = (c->ymax<<shift);

  303.     if(P_TOP[0]      > (c->xmax<<shift)) P_TOP[0]     = (c->xmax<<shift);

  304.     if(P_TOP[1]      > (c->ymax<<shift)) P_TOP[1]     = (c->ymax<<shift);

  305.     if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);

  306.     if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip

  307.     if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);

  308. 

  309.     P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);

  310.     P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);

  311. 

  312.     if (!y) {

  313.         c->pred_x= P_LEFT[0];

  314.         c->pred_y= P_LEFT[1];

  315.     } else {

  316.         c->pred_x = P_MEDIAN[0];

  317.         c->pred_y = P_MEDIAN[1];

  318.     }

  319. 

  320.     score= INT_MAX;

  321.     best_ref= 0;

  322.     for(ref=0; ref<s->ref_frames; ref++){

  323.         init_ref(c, current_data, s->last_picture[ref]->data, NULL, block_w*x, block_w*y, 0);

  324. 

  325.         ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,

  326.                                          (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);

  327. 

  328.         av_assert2(ref_mx >= c->xmin);

  329.         av_assert2(ref_mx <= c->xmax);

  330.         av_assert2(ref_my >= c->ymin);

  331.         av_assert2(ref_my <= c->ymax);

  332. 

  333.         ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);

  334.         ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);

  335.         ref_score+= 2*av_log2(2*ref)*c->penalty_factor;

  336.         if(s->ref_mvs[ref]){

  337.             s->ref_mvs[ref][index][0]= ref_mx;

  338.             s->ref_mvs[ref][index][1]= ref_my;

  339.             s->ref_scores[ref][index]= ref_score;

  340.         }

  341.         if(score > ref_score){

  342.             score= ref_score;

  343.             best_ref= ref;

  344.             mx= ref_mx;

  345.             my= ref_my;

  346.         }

  347.     }

  348.     //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2

  349. 

  350.   //  subpel search

  351.     base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);

  352.     pc= s->c;

  353.     pc.bytestream_start=

  354.     pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo

  355.     memcpy(p_state, s->block_state, sizeof(s->block_state));

  356. 

  357.     if(level!=s->block_max_depth)

  358.         put_rac(&pc, &p_state[4 + s_context], 1);

  359.     put_rac(&pc, &p_state[1 + left->type + top->type], 0);

  360.     if(s->ref_frames > 1)

  361.         put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);

  362.     pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);

  363.     put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);

  364.     put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);

  365.     p_len= pc.bytestream - pc.bytestream_start;

  366.     score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;

  367. 

  368.     block_s= block_w*block_w;

  369.     sum = pix_sum(current_data[0], stride, block_w, block_w);

  370.     l= (sum + block_s/2)/block_s;

  371.     iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;

  372. 

  373.     if (s->nb_planes > 2) {

  374.         block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);

  375.         sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);

  376.         cb= (sum + block_s/2)/block_s;

  377.     //    iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;

  378.         sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);

  379.         cr= (sum + block_s/2)/block_s;

  380.     //    iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;

  381.     }else

  382.         cb = cr = 0;

  383. 

  384.     ic= s->c;

  385.     ic.bytestream_start=

  386.     ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo

  387.     memcpy(i_state, s->block_state, sizeof(s->block_state));

  388.     if(level!=s->block_max_depth)

  389.         put_rac(&ic, &i_state[4 + s_context], 1);

  390.     put_rac(&ic, &i_state[1 + left->type + top->type], 1);

  391.     put_symbol(&ic, &i_state[32],  l-pl , 1);

  392.     if (s->nb_planes > 2) {

  393.         put_symbol(&ic, &i_state[64], cb-pcb, 1);

  394.         put_symbol(&ic, &i_state[96], cr-pcr, 1);

  395.     }

  396.     i_len= ic.bytestream - ic.bytestream_start;

  397.     iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;

  398. 

  399.     av_assert1(iscore < 255*255*256 + s->lambda2*10);

  400.     av_assert1(iscore >= 0);

  401.     av_assert1(l>=0 && l<=255);

  402.     av_assert1(pl>=0 && pl<=255);

  403. 

  404.     if(level==0){

  405.         int varc= iscore >> 8;

  406.         int vard= score >> 8;

  407.         if (vard <= 64 || vard < varc)

  408.             c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);

  409.         else

  410.             c->scene_change_score+= s->m.qscale;

  411.     }

  412. 

  413.     if(level!=s->block_max_depth){

  414.         put_rac(&s->c, &s->block_state[4 + s_context], 0);

  415.         score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);

  416.         score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);

  417.         score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);

  418.         score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);

  419.         score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead

  420. 

  421.         if(score2 < score && score2 < iscore)

  422.             return score2;

  423.     }

  424. 

  425.     if(iscore < score){

  426.         pred_mv(s, &pmx, &pmy, 0, left, top, tr);

  427.         memcpy(pbbak, i_buffer, i_len);

  428.         s->c= ic;

  429.         s->c.bytestream_start= pbbak_start;

  430.         s->c.bytestream= pbbak + i_len;

  431.         set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);

  432.         memcpy(s->block_state, i_state, sizeof(s->block_state));

  433.         return iscore;

  434.     }else{

  435.         memcpy(pbbak, p_buffer, p_len);

  436.         s->c= pc;

  437.         s->c.bytestream_start= pbbak_start;

  438.         s->c.bytestream= pbbak + p_len;

  439.         set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);

  440.         memcpy(s->block_state, p_state, sizeof(s->block_state));

  441.         return score;

  442.     }

  443. }

  444. 

  445. static void encode_q_branch2(SnowContext *s, int level, int x, int y){

  446.     const int w= s->b_width  << s->block_max_depth;

  447.     const int rem_depth= s->block_max_depth - level;

  448.     const int index= (x + y*w) << rem_depth;

  449.     int trx= (x+1)<<rem_depth;

  450.     BlockNode *b= &s->block[index];

  451.     const BlockNode *left  = x ? &s->block[index-1] : &null_block;

  452.     const BlockNode *top   = y ? &s->block[index-w] : &null_block;

  453.     const BlockNode *tl    = y && x ? &s->block[index-w-1] : left;

  454.     const BlockNode *tr    = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt

  455.     int pl = left->color[0];

  456.     int pcb= left->color[1];

  457.     int pcr= left->color[2];

  458.     int pmx, pmy;

  459.     int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);

  460.     int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;

  461.     int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;

  462.     int s_context= 2*left->level + 2*top->level + tl->level + tr->level;

  463. 

  464.     if(s->keyframe){

  465.         set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);

  466.         return;

  467.     }

  468. 

  469.     if(level!=s->block_max_depth){

  470.         if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){

  471.             put_rac(&s->c, &s->block_state[4 + s_context], 1);

  472.         }else{

  473.             put_rac(&s->c, &s->block_state[4 + s_context], 0);

  474.             encode_q_branch2(s, level+1, 2*x+0, 2*y+0);

  475.             encode_q_branch2(s, level+1, 2*x+1, 2*y+0);

  476.             encode_q_branch2(s, level+1, 2*x+0, 2*y+1);

  477.             encode_q_branch2(s, level+1, 2*x+1, 2*y+1);

  478.             return;

  479.         }

  480.     }

  481.     if(b->type & BLOCK_INTRA){

  482.         pred_mv(s, &pmx, &pmy, 0, left, top, tr);

  483.         put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);

  484.         put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);

  485.         if (s->nb_planes > 2) {

  486.             put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);

  487.             put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);

  488.         }

  489.         set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);

  490.     }else{

  491.         pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);

  492.         put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);

  493.         if(s->ref_frames > 1)

  494.             put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);

  495.         put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);

  496.         put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);

  497.         set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);

  498.     }

  499. }

  500. 

  501. static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){

  502.     int i, x2, y2;

  503.     Plane *p= &s->plane[plane_index];

  504.     const int block_size = MB_SIZE >> s->block_max_depth;

  505.     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;

  506.     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;

  507.     const uint8_t *obmc  = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];

  508.     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;

  509.     const int ref_stride= s->current_picture->linesize[plane_index];

  510.     uint8_t *src= s-> input_picture->data[plane_index];

  511.     IDWTELEM *dst= (IDWTELEM*)s->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned

  512.     const int b_stride = s->b_width << s->block_max_depth;

  513.     const int w= p->width;

  514.     const int h= p->height;

  515.     int index= mb_x + mb_y*b_stride;

  516.     BlockNode *b= &s->block[index];

  517.     BlockNode backup= *b;

  518.     int ab=0;

  519.     int aa=0;

  520. 

  521.     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above

  522. 

  523.     b->type|= BLOCK_INTRA;

  524.     b->color[plane_index]= 0;

  525.     memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));

  526. 

  527.     for(i=0; i<4; i++){

  528.         int mb_x2= mb_x + (i &1) - 1;

  529.         int mb_y2= mb_y + (i>>1) - 1;

  530.         int x= block_w*mb_x2 + block_w/2;

  531.         int y= block_h*mb_y2 + block_h/2;

  532. 

  533.         add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,

  534.                     x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);

  535. 

  536.         for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){

  537.             for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){

  538.                 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;

  539.                 int obmc_v= obmc[index];

  540.                 int d;

  541.                 if(y<0) obmc_v += obmc[index + block_h*obmc_stride];

  542.                 if(x<0) obmc_v += obmc[index + block_w];

  543.                 if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];

  544.                 if(x+block_w>w) obmc_v += obmc[index - block_w];

  545.                 //FIXME precalculate this or simplify it somehow else

  546. 

  547.                 d = -dst[index] + (1<<(FRAC_BITS-1));

  548.                 dst[index] = d;

  549.                 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;

  550.                 aa += obmc_v * obmc_v; //FIXME precalculate this

  551.             }

  552.         }

  553.     }

  554.     *b= backup;

  555. 

  556.     return av_clip_uint8( ROUNDED_DIV(ab<<LOG2_OBMC_MAX, aa) ); //FIXME we should not need clipping

  557. }

  558. 

  559. static inline int get_block_bits(SnowContext *s, int x, int y, int w){

  560.     const int b_stride = s->b_width << s->block_max_depth;

  561.     const int b_height = s->b_height<< s->block_max_depth;

  562.     int index= x + y*b_stride;

  563.     const BlockNode *b     = &s->block[index];

  564.     const BlockNode *left  = x ? &s->block[index-1] : &null_block;

  565.     const BlockNode *top   = y ? &s->block[index-b_stride] : &null_block;

  566.     const BlockNode *tl    = y && x ? &s->block[index-b_stride-1] : left;

  567.     const BlockNode *tr    = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;

  568.     int dmx, dmy;

  569. //  int mx_context= av_log2(2*FFABS(left->mx - top->mx));

  570. //  int my_context= av_log2(2*FFABS(left->my - top->my));

  571. 

  572.     if(x<0 || x>=b_stride || y>=b_height)

  573.         return 0;

  574. /*

  575. 1            0      0

  576. 01X          1-2    1

  577. 001XX        3-6    2-3

  578. 0001XXX      7-14   4-7

  579. 00001XXXX   15-30   8-15

  580. */

  581. //FIXME try accurate rate

  582. //FIXME intra and inter predictors if surrounding blocks are not the same type

  583.     if(b->type & BLOCK_INTRA){

  584.         return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))

  585.                    + av_log2(2*FFABS(left->color[1] - b->color[1]))

  586.                    + av_log2(2*FFABS(left->color[2] - b->color[2])));

  587.     }else{

  588.         pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);

  589.         dmx-= b->mx;

  590.         dmy-= b->my;

  591.         return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda

  592.                     + av_log2(2*FFABS(dmy))

  593.                     + av_log2(2*b->ref));

  594.     }

  595. }

  596. 

  597. static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2]){

  598.     Plane *p= &s->plane[plane_index];

  599.     const int block_size = MB_SIZE >> s->block_max_depth;

  600.     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;

  601.     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;

  602.     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;

  603.     const int ref_stride= s->current_picture->linesize[plane_index];

  604.     uint8_t *dst= s->current_picture->data[plane_index];

  605.     uint8_t *src= s->  input_picture->data[plane_index];

  606.     IDWTELEM *pred= (IDWTELEM*)s->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4;

  607.     uint8_t *cur = s->scratchbuf;

  608.     uint8_t *tmp = s->emu_edge_buffer;

  609.     const int b_stride = s->b_width << s->block_max_depth;

  610.     const int b_height = s->b_height<< s->block_max_depth;

  611.     const int w= p->width;

  612.     const int h= p->height;

  613.     int distortion;

  614.     int rate= 0;

  615.     const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);

  616.     int sx= block_w*mb_x - block_w/2;

  617.     int sy= block_h*mb_y - block_h/2;

  618.     int x0= FFMAX(0,-sx);

  619.     int y0= FFMAX(0,-sy);

  620.     int x1= FFMIN(block_w*2, w-sx);

  621.     int y1= FFMIN(block_h*2, h-sy);

  622.     int i,x,y;

  623. 

  624.     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w

  625. 

  626.     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);

  627. 

  628.     for(y=y0; y<y1; y++){

  629.         const uint8_t *obmc1= obmc_edged[y];

  630.         const IDWTELEM *pred1 = pred + y*obmc_stride;

  631.         uint8_t *cur1 = cur + y*ref_stride;

  632.         uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;

  633.         for(x=x0; x<x1; x++){

  634. #if FRAC_BITS >= LOG2_OBMC_MAX

  635.             int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);

  636. #else

  637.             int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);

  638. #endif

  639.             v = (v + pred1[x]) >> FRAC_BITS;

  640.             if(v&(~255)) v= ~(v>>31);

  641.             dst1[x] = v;

  642.         }

  643.     }

  644. 

  645.     /* copy the regions where obmc[] = (uint8_t)256 */

  646.     if(LOG2_OBMC_MAX == 8

  647.         && (mb_x == 0 || mb_x == b_stride-1)

  648.         && (mb_y == 0 || mb_y == b_height-1)){

  649.         if(mb_x == 0)

  650.             x1 = block_w;

  651.         else

  652.             x0 = block_w;

  653.         if(mb_y == 0)

  654.             y1 = block_h;

  655.         else

  656.             y0 = block_h;

  657.         for(y=y0; y<y1; y++)

  658.             memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);

  659.     }

  660. 

  661.     if(block_w==16){

  662.         /* FIXME rearrange dsputil to fit 32x32 cmp functions */

  663.         /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */

  664.         /* FIXME cmps overlap but do not cover the wavelet's whole support.

  665.          * So improving the score of one block is not strictly guaranteed

  666.          * to improve the score of the whole frame, thus iterative motion

  667.          * estimation does not always converge. */

  668.         if(s->avctx->me_cmp == FF_CMP_W97)

  669.             distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);

  670.         else if(s->avctx->me_cmp == FF_CMP_W53)

  671.             distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);

  672.         else{

  673.             distortion = 0;

  674.             for(i=0; i<4; i++){

  675.                 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;

  676.                 distortion += s->mecc.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);

  677.             }

  678.         }

  679.     }else{

  680.         av_assert2(block_w==8);

  681.         distortion = s->mecc.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);

  682.     }

  683. 

  684.     if(plane_index==0){

  685.         for(i=0; i<4; i++){

  686. /* ..RRr

  687.  * .RXx.

  688.  * rxx..

  689.  */

  690.             rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);

  691.         }

  692.         if(mb_x == b_stride-2)

  693.             rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);

  694.     }

  695.     return distortion + rate*penalty_factor;

  696. }

  697. 

  698. static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){

  699.     int i, y2;

  700.     Plane *p= &s->plane[plane_index];

  701.     const int block_size = MB_SIZE >> s->block_max_depth;

  702.     const int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;

  703.     const int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;

  704.     const uint8_t *obmc  = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];

  705.     const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;

  706.     const int ref_stride= s->current_picture->linesize[plane_index];

  707.     uint8_t *dst= s->current_picture->data[plane_index];

  708.     uint8_t *src= s-> input_picture->data[plane_index];

  709.     //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst

  710.     // const has only been removed from zero_dst to suppress a warning

  711.     static IDWTELEM zero_dst[4096]; //FIXME

  712.     const int b_stride = s->b_width << s->block_max_depth;

  713.     const int w= p->width;

  714.     const int h= p->height;

  715.     int distortion= 0;

  716.     int rate= 0;

  717.     const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);

  718. 

  719.     av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below

  720. 

  721.     for(i=0; i<9; i++){

  722.         int mb_x2= mb_x + (i%3) - 1;

  723.         int mb_y2= mb_y + (i/3) - 1;

  724.         int x= block_w*mb_x2 + block_w/2;

  725.         int y= block_h*mb_y2 + block_h/2;

  726. 

  727.         add_yblock(s, 0, NULL, zero_dst, dst, obmc,

  728.                    x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);

  729. 

  730.         //FIXME find a cleaner/simpler way to skip the outside stuff

  731.         for(y2= y; y2<0; y2++)

  732.             memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);

  733.         for(y2= h; y2<y+block_h; y2++)

  734.             memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);

  735.         if(x<0){

  736.             for(y2= y; y2<y+block_h; y2++)

  737.                 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);

  738.         }

  739.         if(x+block_w > w){

  740.             for(y2= y; y2<y+block_h; y2++)

  741.                 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);

  742.         }

  743. 

  744.         av_assert1(block_w== 8 || block_w==16);

  745.         distortion += s->mecc.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);

  746.     }

  747. 

  748.     if(plane_index==0){

  749.         BlockNode *b= &s->block[mb_x+mb_y*b_stride];

  750.         int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);

  751. 

  752. /* ..RRRr

  753.  * .RXXx.

  754.  * .RXXx.

  755.  * rxxx.

  756.  */

  757.         if(merged)

  758.             rate = get_block_bits(s, mb_x, mb_y, 2);

  759.         for(i=merged?4:0; i<9; i++){

  760.             static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};

  761.             rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);

  762.         }

  763.     }

  764.     return distortion + rate*penalty_factor;

  765. }

  766. 

  767. static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){

  768.     const int w= b->width;

  769.     const int h= b->height;

  770.     int x, y;

  771. 

  772.     if(1){

  773.         int run=0;

  774.         int *runs = s->run_buffer;

  775.         int run_index=0;

  776.         int max_index;

  777. 

  778.         for(y=0; y<h; y++){

  779.             for(x=0; x<w; x++){

  780.                 int v, p=0;

  781.                 int /*ll=0, */l=0, lt=0, t=0, rt=0;

  782.                 v= src[x + y*stride];

  783. 

  784.                 if(y){

  785.                     t= src[x + (y-1)*stride];

  786.                     if(x){

  787.                         lt= src[x - 1 + (y-1)*stride];

  788.                     }

  789.                     if(x + 1 < w){

  790.                         rt= src[x + 1 + (y-1)*stride];

  791.                     }

  792.                 }

  793.                 if(x){

  794.                     l= src[x - 1 + y*stride];

  795.                     /*if(x > 1){

  796.                         if(orientation==1) ll= src[y + (x-2)*stride];

  797.                         else               ll= src[x - 2 + y*stride];

  798.                     }*/

  799.                 }

  800.                 if(parent){

  801.                     int px= x>>1;

  802.                     int py= y>>1;

  803.                     if(px<b->parent->width && py<b->parent->height)

  804.                         p= parent[px + py*2*stride];

  805.                 }

  806.                 if(!(/*ll|*/l|lt|t|rt|p)){

  807.                     if(v){

  808.                         runs[run_index++]= run;

  809.                         run=0;

  810.                     }else{

  811.                         run++;

  812.                     }

  813.                 }

  814.             }

  815.         }

  816.         max_index= run_index;

  817.         runs[run_index++]= run;

  818.         run_index=0;

  819.         run= runs[run_index++];

  820. 

  821.         put_symbol2(&s->c, b->state[30], max_index, 0);

  822.         if(run_index <= max_index)

  823.             put_symbol2(&s->c, b->state[1], run, 3);

  824. 

  825.         for(y=0; y<h; y++){

  826.             if(s->c.bytestream_end - s->c.bytestream < w*40){

  827.                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");

  828.                 return -1;

  829.             }

  830.             for(x=0; x<w; x++){

  831.                 int v, p=0;

  832.                 int /*ll=0, */l=0, lt=0, t=0, rt=0;

  833.                 v= src[x + y*stride];

  834. 

  835.                 if(y){

  836.                     t= src[x + (y-1)*stride];

  837.                     if(x){

  838.                         lt= src[x - 1 + (y-1)*stride];

  839.                     }

  840.                     if(x + 1 < w){

  841.                         rt= src[x + 1 + (y-1)*stride];

  842.                     }

  843.                 }

  844.                 if(x){

  845.                     l= src[x - 1 + y*stride];

  846.                     /*if(x > 1){

  847.                         if(orientation==1) ll= src[y + (x-2)*stride];

  848.                         else               ll= src[x - 2 + y*stride];

  849.                     }*/

  850.                 }

  851.                 if(parent){

  852.                     int px= x>>1;

  853.                     int py= y>>1;

  854.                     if(px<b->parent->width && py<b->parent->height)

  855.                         p= parent[px + py*2*stride];

  856.                 }

  857.                 if(/*ll|*/l|lt|t|rt|p){

  858.                     int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));

  859. 

  860.                     put_rac(&s->c, &b->state[0][context], !!v);

  861.                 }else{

  862.                     if(!run){

  863.                         run= runs[run_index++];

  864. 

  865.                         if(run_index <= max_index)

  866.                             put_symbol2(&s->c, b->state[1], run, 3);

  867.                         av_assert2(v);

  868.                     }else{

  869.                         run--;

  870.                         av_assert2(!v);

  871.                     }

  872.                 }

  873.                 if(v){

  874.                     int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));

  875.                     int l2= 2*FFABS(l) + (l<0);

  876.                     int t2= 2*FFABS(t) + (t<0);

  877. 

  878.                     put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);

  879.                     put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);

  880.                 }

  881.             }

  882.         }

  883.     }

  884.     return 0;

  885. }

  886. 

  887. static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){

  888. //    encode_subband_qtree(s, b, src, parent, stride, orientation);

  889. //    encode_subband_z0run(s, b, src, parent, stride, orientation);

  890.     return encode_subband_c0run(s, b, src, parent, stride, orientation);

  891. //    encode_subband_dzr(s, b, src, parent, stride, orientation);

  892. }

  893. 

  894. 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){

  895.     const int b_stride= s->b_width << s->block_max_depth;

  896.     BlockNode *block= &s->block[mb_x + mb_y * b_stride];

  897.     BlockNode backup= *block;

  898.     unsigned value;

  899.     int rd, index;

  900. 

  901.     av_assert2(mb_x>=0 && mb_y>=0);

  902.     av_assert2(mb_x<b_stride);

  903. 

  904.     if(intra){

  905.         block->color[0] = p[0];

  906.         block->color[1] = p[1];

  907.         block->color[2] = p[2];

  908.         block->type |= BLOCK_INTRA;

  909.     }else{

  910.         index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);

  911.         value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);

  912.         if(s->me_cache[index] == value)

  913.             return 0;

  914.         s->me_cache[index]= value;

  915. 

  916.         block->mx= p[0];

  917.         block->my= p[1];

  918.         block->type &= ~BLOCK_INTRA;

  919.     }

  920. 

  921.     rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged) + s->intra_penalty * !!intra;

  922. 

  923. //FIXME chroma

  924.     if(rd < *best_rd){

  925.         *best_rd= rd;

  926.         return 1;

  927.     }else{

  928.         *block= backup;

  929.         return 0;

  930.     }

  931. }

  932. 

  933. /* special case for int[2] args we discard afterwards,

  934.  * fixes compilation problem with gcc 2.95 */

  935. 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){

  936.     int p[2] = {p0, p1};

  937.     return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);

  938. }

  939. 

  940. 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){

  941.     const int b_stride= s->b_width << s->block_max_depth;

  942.     BlockNode *block= &s->block[mb_x + mb_y * b_stride];

  943.     BlockNode backup[4];

  944.     unsigned value;

  945.     int rd, index;

  946. 

  947.     /* We don't initialize backup[] during variable declaration, because

  948.      * that fails to compile on MSVC: "cannot convert from 'BlockNode' to

  949.      * 'int16_t'". */

  950.     backup[0] = block[0];

  951.     backup[1] = block[1];

  952.     backup[2] = block[b_stride];

  953.     backup[3] = block[b_stride + 1];

  954. 

  955.     av_assert2(mb_x>=0 && mb_y>=0);

  956.     av_assert2(mb_x<b_stride);

  957.     av_assert2(((mb_x|mb_y)&1) == 0);

  958. 

  959.     index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);

  960.     value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);

  961.     if(s->me_cache[index] == value)

  962.         return 0;

  963.     s->me_cache[index]= value;

  964. 

  965.     block->mx= p0;

  966.     block->my= p1;

  967.     block->ref= ref;

  968.     block->type &= ~BLOCK_INTRA;

  969.     block[1]= block[b_stride]= block[b_stride+1]= *block;

  970. 

  971.     rd= get_4block_rd(s, mb_x, mb_y, 0);

  972. 

  973. //FIXME chroma

  974.     if(rd < *best_rd){

  975.         *best_rd= rd;

  976.         return 1;

  977.     }else{

  978.         block[0]= backup[0];

  979.         block[1]= backup[1];

  980.         block[b_stride]= backup[2];

  981.         block[b_stride+1]= backup[3];

  982.         return 0;

  983.     }

  984. }

  985. 

  986. static void iterative_me(SnowContext *s){

  987.     int pass, mb_x, mb_y;

  988.     const int b_width = s->b_width  << s->block_max_depth;

  989.     const int b_height= s->b_height << s->block_max_depth;

  990.     const int b_stride= b_width;

  991.     int color[3];

  992. 

  993.     {

  994.         RangeCoder r = s->c;

  995.         uint8_t state[sizeof(s->block_state)];

  996.         memcpy(state, s->block_state, sizeof(s->block_state));

  997.         for(mb_y= 0; mb_y<s->b_height; mb_y++)

  998.             for(mb_x= 0; mb_x<s->b_width; mb_x++)

  999.                 encode_q_branch(s, 0, mb_x, mb_y);

  1000.         s->c = r;

  1001.         memcpy(s->block_state, state, sizeof(s->block_state));

  1002.     }

  1003. 

  1004.     for(pass=0; pass<25; pass++){

  1005.         int change= 0;

  1006. 

  1007.         for(mb_y= 0; mb_y<b_height; mb_y++){

  1008.             for(mb_x= 0; mb_x<b_width; mb_x++){

  1009.                 int dia_change, i, j, ref;

  1010.                 int best_rd= INT_MAX, ref_rd;

  1011.                 BlockNode backup, ref_b;

  1012.                 const int index= mb_x + mb_y * b_stride;

  1013.                 BlockNode *block= &s->block[index];

  1014.                 BlockNode *tb =                   mb_y            ? &s->block[index-b_stride  ] : NULL;

  1015.                 BlockNode *lb = mb_x                              ? &s->block[index         -1] : NULL;

  1016.                 BlockNode *rb = mb_x+1<b_width                    ? &s->block[index         +1] : NULL;

  1017.                 BlockNode *bb =                   mb_y+1<b_height ? &s->block[index+b_stride  ] : NULL;

  1018.                 BlockNode *tlb= mb_x           && mb_y            ? &s->block[index-b_stride-1] : NULL;

  1019.                 BlockNode *trb= mb_x+1<b_width && mb_y            ? &s->block[index-b_stride+1] : NULL;

  1020.                 BlockNode *blb= mb_x           && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;

  1021.                 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;

  1022.                 const int b_w= (MB_SIZE >> s->block_max_depth);

  1023.                 uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];

  1024. 

  1025.                 if(pass && (block->type & BLOCK_OPT))

  1026.                     continue;

  1027.                 block->type |= BLOCK_OPT;

  1028. 

  1029.                 backup= *block;

  1030. 

  1031.                 if(!s->me_cache_generation)

  1032.                     memset(s->me_cache, 0, sizeof(s->me_cache));

  1033.                 s->me_cache_generation += 1<<22;

  1034. 

  1035.                 //FIXME precalculate

  1036.                 {

  1037.                     int x, y;

  1038.                     for (y = 0; y < b_w * 2; y++)

  1039.                         memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);

  1040.                     if(mb_x==0)

  1041.                         for(y=0; y<b_w*2; y++)

  1042.                             memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);

  1043.                     if(mb_x==b_stride-1)

  1044.                         for(y=0; y<b_w*2; y++)

  1045.                             memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);

  1046.                     if(mb_y==0){

  1047.                         for(x=0; x<b_w*2; x++)

  1048.                             obmc_edged[0][x] += obmc_edged[b_w-1][x];

  1049.                         for(y=1; y<b_w; y++)

  1050.                             memcpy(obmc_edged[y], obmc_edged[0], b_w*2);

  1051.                     }

  1052.                     if(mb_y==b_height-1){

  1053.                         for(x=0; x<b_w*2; x++)

  1054.                             obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];

  1055.                         for(y=b_w; y<b_w*2-1; y++)

  1056.                             memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);

  1057.                     }

  1058.                 }

  1059. 

  1060.                 //skip stuff outside the picture

  1061.                 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){

  1062.                     uint8_t *src= s->  input_picture->data[0];

  1063.                     uint8_t *dst= s->current_picture->data[0];

  1064.                     const int stride= s->current_picture->linesize[0];

  1065.                     const int block_w= MB_SIZE >> s->block_max_depth;

  1066.                     const int block_h= MB_SIZE >> s->block_max_depth;

  1067.                     const int sx= block_w*mb_x - block_w/2;

  1068.                     const int sy= block_h*mb_y - block_h/2;

  1069.                     const int w= s->plane[0].width;

  1070.                     const int h= s->plane[0].height;

  1071.                     int y;

  1072. 

  1073.                     for(y=sy; y<0; y++)

  1074.                         memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);

  1075.                     for(y=h; y<sy+block_h*2; y++)

  1076.                         memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);

  1077.                     if(sx<0){

  1078.                         for(y=sy; y<sy+block_h*2; y++)

  1079.                             memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);

  1080.                     }

  1081.                     if(sx+block_w*2 > w){

  1082.                         for(y=sy; y<sy+block_h*2; y++)

  1083.                             memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);

  1084.                     }

  1085.                 }

  1086. 

  1087.                 // intra(black) = neighbors' contribution to the current block

  1088.                 for(i=0; i < s->nb_planes; i++)

  1089.                     color[i]= get_dc(s, mb_x, mb_y, i);

  1090. 

  1091.                 // get previous score (cannot be cached due to OBMC)

  1092.                 if(pass > 0 && (block->type&BLOCK_INTRA)){

  1093.                     int color0[3]= {block->color[0], block->color[1], block->color[2]};

  1094.                     check_block(s, mb_x, mb_y, color0, 1, obmc_edged, &best_rd);

  1095.                 }else

  1096.                     check_block_inter(s, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);

  1097. 

  1098.                 ref_b= *block;

  1099.                 ref_rd= best_rd;

  1100.                 for(ref=0; ref < s->ref_frames; ref++){

  1101.                     int16_t (*mvr)[2]= &s->ref_mvs[ref][index];

  1102.                     if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold

  1103.                         continue;

  1104.                     block->ref= ref;

  1105.                     best_rd= INT_MAX;

  1106. 

  1107.                     check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);

  1108.                     check_block_inter(s, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);

  1109.                     if(tb)

  1110.                         check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);

  1111.                     if(lb)

  1112.                         check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);

  1113.                     if(rb)

  1114.                         check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);

  1115.                     if(bb)

  1116.                         check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);

  1117. 

  1118.                     /* fullpel ME */

  1119.                     //FIXME avoid subpel interpolation / round to nearest integer

  1120.                     do{

  1121.                         int newx = block->mx;

  1122.                         int newy = block->my;

  1123.                         int dia_size = s->iterative_dia_size ? s->iterative_dia_size : FFMAX(s->avctx->dia_size, 1);

  1124.                         dia_change=0;

  1125.                         for(i=0; i < dia_size; i++){

  1126.                             for(j=0; j<i; j++){

  1127.                                 dia_change |= check_block_inter(s, mb_x, mb_y, newx+4*(i-j), newy+(4*j), obmc_edged, &best_rd);

  1128.                                 dia_change |= check_block_inter(s, mb_x, mb_y, newx-4*(i-j), newy-(4*j), obmc_edged, &best_rd);

  1129.                                 dia_change |= check_block_inter(s, mb_x, mb_y, newx-(4*j), newy+4*(i-j), obmc_edged, &best_rd);

  1130.                                 dia_change |= check_block_inter(s, mb_x, mb_y, newx+(4*j), newy-4*(i-j), obmc_edged, &best_rd);

  1131.                             }

  1132.                         }

  1133.                     }while(dia_change);

  1134.                     /* subpel ME */

  1135.                     do{

  1136.                         static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};

  1137.                         dia_change=0;

  1138.                         for(i=0; i<8; i++)

  1139.                             dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);

  1140.                     }while(dia_change);

  1141.                     //FIXME or try the standard 2 pass qpel or similar

  1142. 

  1143.                     mvr[0][0]= block->mx;

  1144.                     mvr[0][1]= block->my;

  1145.                     if(ref_rd > best_rd){

  1146.                         ref_rd= best_rd;

  1147.                         ref_b= *block;

  1148.                     }

  1149.                 }

  1150.                 best_rd= ref_rd;

  1151.                 *block= ref_b;

  1152.                 check_block(s, mb_x, mb_y, color, 1, obmc_edged, &best_rd);

  1153.                 //FIXME RD style color selection

  1154.                 if(!same_block(block, &backup)){

  1155.                     if(tb ) tb ->type &= ~BLOCK_OPT;

  1156.                     if(lb ) lb ->type &= ~BLOCK_OPT;

  1157.                     if(rb ) rb ->type &= ~BLOCK_OPT;

  1158.                     if(bb ) bb ->type &= ~BLOCK_OPT;

  1159.                     if(tlb) tlb->type &= ~BLOCK_OPT;

  1160.                     if(trb) trb->type &= ~BLOCK_OPT;

  1161.                     if(blb) blb->type &= ~BLOCK_OPT;

  1162.                     if(brb) brb->type &= ~BLOCK_OPT;

  1163.                     change ++;

  1164.                 }

  1165.             }

  1166.         }

  1167.         av_log(s->avctx, AV_LOG_DEBUG, "pass:%d changed:%d\n", pass, change);

  1168.         if(!change)

  1169.             break;

  1170.     }

  1171. 

  1172.     if(s->block_max_depth == 1){

  1173.         int change= 0;

  1174.         for(mb_y= 0; mb_y<b_height; mb_y+=2){

  1175.             for(mb_x= 0; mb_x<b_width; mb_x+=2){

  1176.                 int i;

  1177.                 int best_rd, init_rd;

  1178.                 const int index= mb_x + mb_y * b_stride;

  1179.                 BlockNode *b[4];

  1180. 

  1181.                 b[0]= &s->block[index];

  1182.                 b[1]= b[0]+1;

  1183.                 b[2]= b[0]+b_stride;

  1184.                 b[3]= b[2]+1;

  1185.                 if(same_block(b[0], b[1]) &&

  1186.                    same_block(b[0], b[2]) &&

  1187.                    same_block(b[0], b[3]))

  1188.                     continue;

  1189. 

  1190.                 if(!s->me_cache_generation)

  1191.                     memset(s->me_cache, 0, sizeof(s->me_cache));

  1192.                 s->me_cache_generation += 1<<22;

  1193. 

  1194.                 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);

  1195. 

  1196.                 //FIXME more multiref search?

  1197.                 check_4block_inter(s, mb_x, mb_y,

  1198.                                    (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,

  1199.                                    (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);

  1200. 

  1201.                 for(i=0; i<4; i++)

  1202.                     if(!(b[i]->type&BLOCK_INTRA))

  1203.                         check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);

  1204. 

  1205.                 if(init_rd != best_rd)

  1206.                     change++;

  1207.             }

  1208.         }

  1209.         av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);

  1210.     }

  1211. }

  1212. 

  1213. static void encode_blocks(SnowContext *s, int search){

  1214.     int x, y;

  1215.     int w= s->b_width;

  1216.     int h= s->b_height;

  1217. 

  1218.     if(s->motion_est == FF_ME_ITER && !s->keyframe && search)

  1219.         iterative_me(s);

  1220. 

  1221.     for(y=0; y<h; y++){

  1222.         if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit

  1223.             av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");

  1224.             return;

  1225.         }

  1226.         for(x=0; x<w; x++){

  1227.             if(s->motion_est == FF_ME_ITER || !search)

  1228.                 encode_q_branch2(s, 0, x, y);

  1229.             else

  1230.                 encode_q_branch (s, 0, x, y);

  1231.         }

  1232.     }

  1233. }

  1234. 

  1235. static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){

  1236.     const int w= b->width;

  1237.     const int h= b->height;

  1238.     const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);

  1239.     const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);

  1240.     int x,y, thres1, thres2;

  1241. 

  1242.     if(s->qlog == LOSSLESS_QLOG){

  1243.         for(y=0; y<h; y++)

  1244.             for(x=0; x<w; x++)

  1245.                 dst[x + y*stride]= src[x + y*stride];

  1246.         return;

  1247.     }

  1248. 

  1249.     bias= bias ? 0 : (3*qmul)>>3;

  1250.     thres1= ((qmul - bias)>>QEXPSHIFT) - 1;

  1251.     thres2= 2*thres1;

  1252. 

  1253.     if(!bias){

  1254.         for(y=0; y<h; y++){

  1255.             for(x=0; x<w; x++){

  1256.                 int i= src[x + y*stride];

  1257. 

  1258.                 if((unsigned)(i+thres1) > thres2){

  1259.                     if(i>=0){

  1260.                         i<<= QEXPSHIFT;

  1261.                         i/= qmul; //FIXME optimize

  1262.                         dst[x + y*stride]=  i;

  1263.                     }else{

  1264.                         i= -i;

  1265.                         i<<= QEXPSHIFT;

  1266.                         i/= qmul; //FIXME optimize

  1267.                         dst[x + y*stride]= -i;

  1268.                     }

  1269.                 }else

  1270.                     dst[x + y*stride]= 0;

  1271.             }

  1272.         }

  1273.     }else{

  1274.         for(y=0; y<h; y++){

  1275.             for(x=0; x<w; x++){

  1276.                 int i= src[x + y*stride];

  1277. 

  1278.                 if((unsigned)(i+thres1) > thres2){

  1279.                     if(i>=0){

  1280.                         i<<= QEXPSHIFT;

  1281.                         i= (i + bias) / qmul; //FIXME optimize

  1282.                         dst[x + y*stride]=  i;

  1283.                     }else{

  1284.                         i= -i;

  1285.                         i<<= QEXPSHIFT;

  1286.                         i= (i + bias) / qmul; //FIXME optimize

  1287.                         dst[x + y*stride]= -i;

  1288.                     }

  1289.                 }else

  1290.                     dst[x + y*stride]= 0;

  1291.             }

  1292.         }

  1293.     }

  1294. }

  1295. 

  1296. static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){

  1297.     const int w= b->width;

  1298.     const int h= b->height;

  1299.     const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);

  1300.     const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);

  1301.     const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;

  1302.     int x,y;

  1303. 

  1304.     if(s->qlog == LOSSLESS_QLOG) return;

  1305. 

  1306.     for(y=0; y<h; y++){

  1307.         for(x=0; x<w; x++){

  1308.             int i= src[x + y*stride];

  1309.             if(i<0){

  1310.                 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias

  1311.             }else if(i>0){

  1312.                 src[x + y*stride]=  (( i*qmul + qadd)>>(QEXPSHIFT));

  1313.             }

  1314.         }

  1315.     }

  1316. }

  1317. 

  1318. static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){

  1319.     const int w= b->width;

  1320.     const int h= b->height;

  1321.     int x,y;

  1322. 

  1323.     for(y=h-1; y>=0; y--){

  1324.         for(x=w-1; x>=0; x--){

  1325.             int i= x + y*stride;

  1326. 

  1327.             if(x){

  1328.                 if(use_median){

  1329.                     if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);

  1330.                     else  src[i] -= src[i - 1];

  1331.                 }else{

  1332.                     if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);

  1333.                     else  src[i] -= src[i - 1];

  1334.                 }

  1335.             }else{

  1336.                 if(y) src[i] -= src[i - stride];

  1337.             }

  1338.         }

  1339.     }

  1340. }

  1341. 

  1342. static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){

  1343.     const int w= b->width;

  1344.     const int h= b->height;

  1345.     int x,y;

  1346. 

  1347.     for(y=0; y<h; y++){

  1348.         for(x=0; x<w; x++){

  1349.             int i= x + y*stride;

  1350. 

  1351.             if(x){

  1352.                 if(use_median){

  1353.                     if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);

  1354.                     else  src[i] += src[i - 1];

  1355.                 }else{

  1356.                     if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);

  1357.                     else  src[i] += src[i - 1];

  1358.                 }

  1359.             }else{

  1360.                 if(y) src[i] += src[i - stride];

  1361.             }

  1362.         }

  1363.     }

  1364. }

  1365. 

  1366. static void encode_qlogs(SnowContext *s){

  1367.     int plane_index, level, orientation;

  1368. 

  1369.     for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){

  1370.         for(level=0; level<s->spatial_decomposition_count; level++){

  1371.             for(orientation=level ? 1:0; orientation<4; orientation++){

  1372.                 if(orientation==2) continue;

  1373.                 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);

  1374.             }

  1375.         }

  1376.     }

  1377. }

  1378. 

  1379. static void encode_header(SnowContext *s){

  1380.     int plane_index, i;

  1381.     uint8_t kstate[32];

  1382. 

  1383.     memset(kstate, MID_STATE, sizeof(kstate));

  1384. 

  1385.     put_rac(&s->c, kstate, s->keyframe);

  1386.     if(s->keyframe || s->always_reset){

  1387.         ff_snow_reset_contexts(s);

  1388.         s->last_spatial_decomposition_type=

  1389.         s->last_qlog=

  1390.         s->last_qbias=

  1391.         s->last_mv_scale=

  1392.         s->last_block_max_depth= 0;

  1393.         for(plane_index=0; plane_index<2; plane_index++){

  1394.             Plane *p= &s->plane[plane_index];

  1395.             p->last_htaps=0;

  1396.             p->last_diag_mc=0;

  1397.             memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));

  1398.         }

  1399.     }

  1400.     if(s->keyframe){

  1401.         put_symbol(&s->c, s->header_state, s->version, 0);

  1402.         put_rac(&s->c, s->header_state, s->always_reset);

  1403.         put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);

  1404.         put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);

  1405.         put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);

  1406.         put_symbol(&s->c, s->header_state, s->colorspace_type, 0);

  1407.         if (s->nb_planes > 2) {

  1408.             put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);

  1409.             put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);

  1410.         }

  1411.         put_rac(&s->c, s->header_state, s->spatial_scalability);

  1412. //        put_rac(&s->c, s->header_state, s->rate_scalability);

  1413.         put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);

  1414. 

  1415.         encode_qlogs(s);

  1416.     }

  1417. 

  1418.     if(!s->keyframe){

  1419.         int update_mc=0;

  1420.         for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){

  1421.             Plane *p= &s->plane[plane_index];

  1422.             update_mc |= p->last_htaps   != p->htaps;

  1423.             update_mc |= p->last_diag_mc != p->diag_mc;

  1424.             update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));

  1425.         }

  1426.         put_rac(&s->c, s->header_state, update_mc);

  1427.         if(update_mc){

  1428.             for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){

  1429.                 Plane *p= &s->plane[plane_index];

  1430.                 put_rac(&s->c, s->header_state, p->diag_mc);

  1431.                 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);

  1432.                 for(i= p->htaps/2; i; i--)

  1433.                     put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);

  1434.             }

  1435.         }

  1436.         if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){

  1437.             put_rac(&s->c, s->header_state, 1);

  1438.             put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);

  1439.             encode_qlogs(s);

  1440.         }else

  1441.             put_rac(&s->c, s->header_state, 0);

  1442.     }

  1443. 

  1444.     put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);

  1445.     put_symbol(&s->c, s->header_state, s->qlog            - s->last_qlog    , 1);

  1446.     put_symbol(&s->c, s->header_state, s->mv_scale        - s->last_mv_scale, 1);

  1447.     put_symbol(&s->c, s->header_state, s->qbias           - s->last_qbias   , 1);

  1448.     put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);

  1449. 

  1450. }

  1451. 

  1452. static void update_last_header_values(SnowContext *s){

  1453.     int plane_index;

  1454. 

  1455.     if(!s->keyframe){

  1456.         for(plane_index=0; plane_index<2; plane_index++){

  1457.             Plane *p= &s->plane[plane_index];

  1458.             p->last_diag_mc= p->diag_mc;

  1459.             p->last_htaps  = p->htaps;

  1460.             memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));

  1461.         }

  1462.     }

  1463. 

  1464.     s->last_spatial_decomposition_type  = s->spatial_decomposition_type;

  1465.     s->last_qlog                        = s->qlog;

  1466.     s->last_qbias                       = s->qbias;

  1467.     s->last_mv_scale                    = s->mv_scale;

  1468.     s->last_block_max_depth             = s->block_max_depth;

  1469.     s->last_spatial_decomposition_count = s->spatial_decomposition_count;

  1470. }

  1471. 

  1472. static int qscale2qlog(int qscale){

  1473.     return rint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))

  1474.            + 61*QROOT/8; ///< 64 > 60

  1475. }

  1476. 

  1477. static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)

  1478. {

  1479.     /* Estimate the frame's complexity as a sum of weighted dwt coefficients.

  1480.      * FIXME we know exact mv bits at this point,

  1481.      * but ratecontrol isn't set up to include them. */

  1482.     uint32_t coef_sum= 0;

  1483.     int level, orientation, delta_qlog;

  1484. 

  1485.     for(level=0; level<s->spatial_decomposition_count; level++){

  1486.         for(orientation=level ? 1 : 0; orientation<4; orientation++){

  1487.             SubBand *b= &s->plane[0].band[level][orientation];

  1488.             IDWTELEM *buf= b->ibuf;

  1489.             const int w= b->width;

  1490.             const int h= b->height;

  1491.             const int stride= b->stride;

  1492.             const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);

  1493.             const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);

  1494.             const int qdiv= (1<<16)/qmul;

  1495.             int x, y;

  1496.             //FIXME this is ugly

  1497.             for(y=0; y<h; y++)

  1498.                 for(x=0; x<w; x++)

  1499.                     buf[x+y*stride]= b->buf[x+y*stride];

  1500.             if(orientation==0)

  1501.                 decorrelate(s, b, buf, stride, 1, 0);

  1502.             for(y=0; y<h; y++)

  1503.                 for(x=0; x<w; x++)

  1504.                     coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;

  1505.         }

  1506.     }

  1507. 

  1508.     /* ugly, ratecontrol just takes a sqrt again */

  1509.     av_assert0(coef_sum < INT_MAX);

  1510.     coef_sum = (uint64_t)coef_sum * coef_sum >> 16;

  1511. 

  1512.     if(pict->pict_type == AV_PICTURE_TYPE_I){

  1513.         s->m.current_picture.mb_var_sum= coef_sum;

  1514.         s->m.current_picture.mc_mb_var_sum= 0;

  1515.     }else{

  1516.         s->m.current_picture.mc_mb_var_sum= coef_sum;

  1517.         s->m.current_picture.mb_var_sum= 0;

  1518.     }

  1519. 

  1520.     pict->quality= ff_rate_estimate_qscale(&s->m, 1);

  1521.     if (pict->quality < 0)

  1522.         return INT_MIN;

  1523.     s->lambda= pict->quality * 3/2;

  1524.     delta_qlog= qscale2qlog(pict->quality) - s->qlog;

  1525.     s->qlog+= delta_qlog;

  1526.     return delta_qlog;

  1527. }

  1528. 

  1529. static void calculate_visual_weight(SnowContext *s, Plane *p){

  1530.     int width = p->width;

  1531.     int height= p->height;

  1532.     int level, orientation, x, y;

  1533. 

  1534.     for(level=0; level<s->spatial_decomposition_count; level++){

  1535.         for(orientation=level ? 1 : 0; orientation<4; orientation++){

  1536.             SubBand *b= &p->band[level][orientation];

  1537.             IDWTELEM *ibuf= b->ibuf;

  1538.             int64_t error=0;

  1539. 

  1540.             memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);

  1541.             ibuf[b->width/2 + b->height/2*b->stride]= 256*16;

  1542.             ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);

  1543.             for(y=0; y<height; y++){

  1544.                 for(x=0; x<width; x++){

  1545.                     int64_t d= s->spatial_idwt_buffer[x + y*width]*16;

  1546.                     error += d*d;

  1547.                 }

  1548.             }

  1549. 

  1550.             b->qlog= (int)(QROOT * log2(352256.0/sqrt(error)) + 0.5);

  1551.         }

  1552.     }

  1553. }

  1554. 

  1555. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1556.                         const AVFrame *pict, int *got_packet)

  1557. {

  1558.     SnowContext *s = avctx->priv_data;

  1559.     RangeCoder * const c= &s->c;

  1560.     AVFrame *pic;

  1561.     const int width= s->avctx->width;

  1562.     const int height= s->avctx->height;

  1563.     int level, orientation, plane_index, i, y, ret;

  1564.     uint8_t rc_header_bak[sizeof(s->header_state)];

  1565.     uint8_t rc_block_bak[sizeof(s->block_state)];

  1566. 

  1567.     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)

  1568.         return ret;

  1569. 

  1570.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1571.     ff_build_rac_states(c, (1LL<<32)/20, 256-8);

  1572. 

  1573.     for(i=0; i < s->nb_planes; i++){

  1574.         int hshift= i ? s->chroma_h_shift : 0;

  1575.         int vshift= i ? s->chroma_v_shift : 0;

  1576.         for(y=0; y<FF_CEIL_RSHIFT(height, vshift); y++)

  1577.             memcpy(&s->input_picture->data[i][y * s->input_picture->linesize[i]],

  1578.                    &pict->data[i][y * pict->linesize[i]],

  1579.                    FF_CEIL_RSHIFT(width, hshift));

  1580.         s->mpvencdsp.draw_edges(s->input_picture->data[i], s->input_picture->linesize[i],

  1581.                                 FF_CEIL_RSHIFT(width, hshift), FF_CEIL_RSHIFT(height, vshift),

  1582.                                 EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,

  1583.                                 EDGE_TOP | EDGE_BOTTOM);

  1584. 

  1585.     }

  1586.     emms_c();

  1587.     pic = s->input_picture;

  1588.     pic->pict_type = pict->pict_type;

  1589.     pic->quality = pict->quality;

  1590. 

  1591.     s->m.picture_number= avctx->frame_number;

  1592.     if(avctx->flags&AV_CODEC_FLAG_PASS2){

  1593.         s->m.pict_type = pic->pict_type = s->m.rc_context.entry[avctx->frame_number].new_pict_type;

  1594.         s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;

  1595.         if(!(avctx->flags&AV_CODEC_FLAG_QSCALE)) {

  1596.             pic->quality = ff_rate_estimate_qscale(&s->m, 0);

  1597.             if (pic->quality < 0)

  1598.                 return -1;

  1599.         }

  1600.     }else{

  1601.         s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;

  1602.         s->m.pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;

  1603.     }

  1604. 

  1605.     if(s->pass1_rc && avctx->frame_number == 0)

  1606.         pic->quality = 2*FF_QP2LAMBDA;

  1607.     if (pic->quality) {

  1608.         s->qlog   = qscale2qlog(pic->quality);

  1609.         s->lambda = pic->quality * 3/2;

  1610.     }

  1611.     if (s->qlog < 0 || (!pic->quality && (avctx->flags & AV_CODEC_FLAG_QSCALE))) {

  1612.         s->qlog= LOSSLESS_QLOG;

  1613.         s->lambda = 0;

  1614.     }//else keep previous frame's qlog until after motion estimation

  1615. 

  1616.     if (s->current_picture->data[0]

  1617. #if FF_API_EMU_EDGE

  1618.         && !(s->avctx->flags&CODEC_FLAG_EMU_EDGE)

  1619. #endif

  1620.         ) {

  1621.         int w = s->avctx->width;

  1622.         int h = s->avctx->height;

  1623. 

  1624.         s->mpvencdsp.draw_edges(s->current_picture->data[0],

  1625.                                 s->current_picture->linesize[0], w   , h   ,

  1626.                                 EDGE_WIDTH  , EDGE_WIDTH  , EDGE_TOP | EDGE_BOTTOM);

  1627.         if (s->current_picture->data[2]) {

  1628.             s->mpvencdsp.draw_edges(s->current_picture->data[1],

  1629.                                     s->current_picture->linesize[1], w>>s->chroma_h_shift, h>>s->chroma_v_shift,

  1630.                                     EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);

  1631.             s->mpvencdsp.draw_edges(s->current_picture->data[2],

  1632.                                     s->current_picture->linesize[2], w>>s->chroma_h_shift, h>>s->chroma_v_shift,

  1633.                                     EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);

  1634.         }

  1635.     }

  1636. 

  1637.     ff_snow_frame_start(s);

  1638.     av_frame_unref(avctx->coded_frame);

  1639.     ret = av_frame_ref(avctx->coded_frame, s->current_picture);

  1640.     if (ret < 0)

  1641.         return ret;

  1642. 

  1643.     s->m.current_picture_ptr= &s->m.current_picture;

  1644.     s->m.current_picture.f = s->current_picture;

  1645.     s->m.current_picture.f->pts = pict->pts;

  1646.     if(pic->pict_type == AV_PICTURE_TYPE_P){

  1647.         int block_width = (width +15)>>4;

  1648.         int block_height= (height+15)>>4;

  1649.         int stride= s->current_picture->linesize[0];

  1650. 

  1651.         av_assert0(s->current_picture->data[0]);

  1652.         av_assert0(s->last_picture[0]->data[0]);

  1653. 

  1654.         s->m.avctx= s->avctx;

  1655.         s->m.   last_picture.f = s->last_picture[0];

  1656.         s->m.    new_picture.f = s->input_picture;

  1657.         s->m.   last_picture_ptr= &s->m.   last_picture;

  1658.         s->m.linesize = stride;

  1659.         s->m.uvlinesize= s->current_picture->linesize[1];

  1660.         s->m.width = width;

  1661.         s->m.height= height;

  1662.         s->m.mb_width = block_width;

  1663.         s->m.mb_height= block_height;

  1664.         s->m.mb_stride=   s->m.mb_width+1;

  1665.         s->m.b8_stride= 2*s->m.mb_width+1;

  1666.         s->m.f_code=1;

  1667.         s->m.pict_type = pic->pict_type;

  1668. #if FF_API_MOTION_EST

  1669.         s->m.me_method= s->avctx->me_method;

  1670. #endif

  1671.         s->m.motion_est= s->motion_est;

  1672.         s->m.me.scene_change_score=0;

  1673.         s->m.me.dia_size = avctx->dia_size;

  1674.         s->m.quarter_sample= (s->avctx->flags & AV_CODEC_FLAG_QPEL)!=0;

  1675.         s->m.out_format= FMT_H263;

  1676.         s->m.unrestricted_mv= 1;

  1677. 

  1678.         s->m.lambda = s->lambda;

  1679.         s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);

  1680.         s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;

  1681. 

  1682.         s->m.mecc= s->mecc; //move

  1683.         s->m.qdsp= s->qdsp; //move

  1684.         s->m.hdsp = s->hdsp;

  1685.         ff_init_me(&s->m);

  1686.         s->hdsp = s->m.hdsp;

  1687.         s->mecc= s->m.mecc;

  1688.     }

  1689. 

  1690.     if(s->pass1_rc){

  1691.         memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));

  1692.         memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));

  1693.     }

  1694. 

  1695. redo_frame:

  1696. 

  1697.     s->spatial_decomposition_count= 5;

  1698. 

  1699.     while(   !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))

  1700.           || !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))

  1701.         s->spatial_decomposition_count--;

  1702. 

  1703.     if (s->spatial_decomposition_count <= 0) {

  1704.         av_log(avctx, AV_LOG_ERROR, "Resolution too low\n");

  1705.         return AVERROR(EINVAL);

  1706.     }

  1707. 

  1708.     s->m.pict_type = pic->pict_type;

  1709.     s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;

  1710. 

  1711.     ff_snow_common_init_after_header(avctx);

  1712. 

  1713.     if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){

  1714.         for(plane_index=0; plane_index < s->nb_planes; plane_index++){

  1715.             calculate_visual_weight(s, &s->plane[plane_index]);

  1716.         }

  1717.     }

  1718. 

  1719.     encode_header(s);

  1720.     s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);

  1721.     encode_blocks(s, 1);

  1722.     s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;

  1723. 

  1724.     for(plane_index=0; plane_index < s->nb_planes; plane_index++){

  1725.         Plane *p= &s->plane[plane_index];

  1726.         int w= p->width;

  1727.         int h= p->height;

  1728.         int x, y;

  1729. //        int bits= put_bits_count(&s->c.pb);

  1730. 

  1731.         if (!s->memc_only) {

  1732.             //FIXME optimize

  1733.             if(pict->data[plane_index]) //FIXME gray hack

  1734.                 for(y=0; y<h; y++){

  1735.                     for(x=0; x<w; x++){

  1736.                         s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;

  1737.                     }

  1738.                 }

  1739.             predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);

  1740. 

  1741.             if(   plane_index==0

  1742.                && pic->pict_type == AV_PICTURE_TYPE_P

  1743.                && !(avctx->flags&AV_CODEC_FLAG_PASS2)

  1744.                && s->m.me.scene_change_score > s->avctx->scenechange_threshold){

  1745.                 ff_init_range_encoder(c, pkt->data, pkt->size);

  1746.                 ff_build_rac_states(c, (1LL<<32)/20, 256-8);

  1747.                 pic->pict_type= AV_PICTURE_TYPE_I;

  1748.                 s->keyframe=1;

  1749.                 s->current_picture->key_frame=1;

  1750.                 goto redo_frame;

  1751.             }

  1752. 

  1753.             if(s->qlog == LOSSLESS_QLOG){

  1754.                 for(y=0; y<h; y++){

  1755.                     for(x=0; x<w; x++){

  1756.                         s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;

  1757.                     }

  1758.                 }

  1759.             }else{

  1760.                 for(y=0; y<h; y++){

  1761.                     for(x=0; x<w; x++){

  1762.                         s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;

  1763.                     }

  1764.                 }

  1765.             }

  1766. 

  1767.             ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);

  1768. 

  1769.             if(s->pass1_rc && plane_index==0){

  1770.                 int delta_qlog = ratecontrol_1pass(s, pic);

  1771.                 if (delta_qlog <= INT_MIN)

  1772.                     return -1;

  1773.                 if(delta_qlog){

  1774.                     //reordering qlog in the bitstream would eliminate this reset

  1775.                     ff_init_range_encoder(c, pkt->data, pkt->size);

  1776.                     memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));

  1777.                     memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));

  1778.                     encode_header(s);

  1779.                     encode_blocks(s, 0);

  1780.                 }

  1781.             }

  1782. 

  1783.             for(level=0; level<s->spatial_decomposition_count; level++){

  1784.                 for(orientation=level ? 1 : 0; orientation<4; orientation++){

  1785.                     SubBand *b= &p->band[level][orientation];

  1786. 

  1787.                     quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);

  1788.                     if(orientation==0)

  1789.                         decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);

  1790.                     if (!s->no_bitstream)

  1791.                     encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);

  1792.                     av_assert0(b->parent==NULL || b->parent->stride == b->stride*2);

  1793.                     if(orientation==0)

  1794.                         correlate(s, b, b->ibuf, b->stride, 1, 0);

  1795.                 }

  1796.             }

  1797. 

  1798.             for(level=0; level<s->spatial_decomposition_count; level++){

  1799.                 for(orientation=level ? 1 : 0; orientation<4; orientation++){

  1800.                     SubBand *b= &p->band[level][orientation];

  1801. 

  1802.                     dequantize(s, b, b->ibuf, b->stride);

  1803.                 }

  1804.             }

  1805. 

  1806.             ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);

  1807.             if(s->qlog == LOSSLESS_QLOG){

  1808.                 for(y=0; y<h; y++){

  1809.                     for(x=0; x<w; x++){

  1810.                         s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;

  1811.                     }

  1812.                 }

  1813.             }

  1814.             predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);

  1815.         }else{

  1816.             //ME/MC only

  1817.             if(pic->pict_type == AV_PICTURE_TYPE_I){

  1818.                 for(y=0; y<h; y++){

  1819.                     for(x=0; x<w; x++){

  1820.                         s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x]=

  1821.                             pict->data[plane_index][y*pict->linesize[plane_index] + x];

  1822.                     }

  1823.                 }

  1824.             }else{

  1825.                 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);

  1826.                 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);

  1827.             }

  1828.         }

  1829.         if(s->avctx->flags&AV_CODEC_FLAG_PSNR){

  1830.             int64_t error= 0;

  1831. 

  1832.             if(pict->data[plane_index]) //FIXME gray hack

  1833.                 for(y=0; y<h; y++){

  1834.                     for(x=0; x<w; x++){

  1835.                         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];

  1836.                         error += d*d;

  1837.                     }

  1838.                 }

  1839.             s->avctx->error[plane_index] += error;

  1840.             s->encoding_error[plane_index] = error;

  1841.         }

  1842. 

  1843.     }

  1844. 

  1845.     update_last_header_values(s);

  1846. 

  1847.     ff_snow_release_buffer(avctx);

  1848. 

  1849.     s->current_picture->coded_picture_number = avctx->frame_number;

  1850.     s->current_picture->pict_type = pic->pict_type;

  1851.     s->current_picture->quality = pic->quality;

  1852.     s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);

  1853.     s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;

  1854.     s->m.current_picture.f->display_picture_number =

  1855.     s->m.current_picture.f->coded_picture_number   = avctx->frame_number;

  1856.     s->m.current_picture.f->quality                = pic->quality;

  1857.     s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);

  1858.     if(s->pass1_rc)

  1859.         if (ff_rate_estimate_qscale(&s->m, 0) < 0)

  1860.             return -1;

  1861.     if(avctx->flags&AV_CODEC_FLAG_PASS1)

  1862.         ff_write_pass1_stats(&s->m);

  1863.     s->m.last_pict_type = s->m.pict_type;

  1864.     avctx->frame_bits = s->m.frame_bits;

  1865.     avctx->mv_bits = s->m.mv_bits;

  1866.     avctx->misc_bits = s->m.misc_bits;

  1867.     avctx->p_tex_bits = s->m.p_tex_bits;

  1868. 

  1869.     emms_c();

  1870. 

  1871.     ff_side_data_set_encoder_stats(pkt, s->current_picture->quality,

  1872.                                    s->encoding_error,

  1873.                                    (s->avctx->flags&AV_CODEC_FLAG_PSNR) ? 4 : 0,

  1874.                                    s->current_picture->pict_type);

  1875. 

  1876. #if FF_API_ERROR_FRAME

  1877. FF_DISABLE_DEPRECATION_WARNINGS

  1878.     memcpy(s->current_picture->error, s->encoding_error, sizeof(s->encoding_error));

  1879. FF_ENABLE_DEPRECATION_WARNINGS

  1880. #endif

  1881. 

  1882.     pkt->size = ff_rac_terminate(c);

  1883.     if (s->current_picture->key_frame)

  1884.         pkt->flags |= AV_PKT_FLAG_KEY;

  1885.     *got_packet = 1;

  1886. 

  1887.     return 0;

  1888. }

  1889. 

  1890. static av_cold int encode_end(AVCodecContext *avctx)

  1891. {

  1892.     SnowContext *s = avctx->priv_data;

  1893. 

  1894.     ff_snow_common_end(s);

  1895.     ff_rate_control_uninit(&s->m);

  1896.     av_frame_free(&s->input_picture);

  1897.     av_freep(&avctx->stats_out);

  1898. 

  1899.     return 0;

  1900. }

  1901. 

  1902. #define OFFSET(x) offsetof(SnowContext, x)

  1903. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1904. static const AVOption options[] = {

  1905.     FF_MPV_COMMON_OPTS

  1906.     { "iter",           NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ITER }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" },

  1907.     { "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 },

  1908.     { "no_bitstream",   "Skip final bitstream writeout.",                    OFFSET(no_bitstream), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },

  1909.     { "intra_penalty",  "Penalty for intra blocks in block decission",      OFFSET(intra_penalty), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },

  1910.     { "iterative_dia_size",  "Dia size for the iterative ME",          OFFSET(iterative_dia_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },

  1911.     { NULL },

  1912. };

  1913. 

  1914. static const AVClass snowenc_class = {

  1915.     .class_name = "snow encoder",

  1916.     .item_name  = av_default_item_name,

  1917.     .option     = options,

  1918.     .version    = LIBAVUTIL_VERSION_INT,

  1919. };

  1920. 

  1921. AVCodec ff_snow_encoder = {

  1922.     .name           = "snow",

  1923.     .long_name      = NULL_IF_CONFIG_SMALL("Snow"),

  1924.     .type           = AVMEDIA_TYPE_VIDEO,

  1925.     .id             = AV_CODEC_ID_SNOW,

  1926.     .priv_data_size = sizeof(SnowContext),

  1927.     .init           = encode_init,

  1928.     .encode2        = encode_frame,

  1929.     .close          = encode_end,

  1930.     .pix_fmts       = (const enum AVPixelFormat[]){

  1931.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,

  1932.         AV_PIX_FMT_GRAY8,

  1933.         AV_PIX_FMT_NONE

  1934.     },

  1935.     .priv_class     = &snowenc_class,

  1936.     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |

  1937.                       FF_CODEC_CAP_INIT_CLEANUP,

  1938. };

  1939. 

  1940. 

  1941. #ifdef TEST

  1942. #undef malloc

  1943. #undef free

  1944. #undef printf

  1945. 

  1946. #include "libavutil/lfg.h"

  1947. #include "libavutil/mathematics.h"

  1948. 

  1949. int main(void){

  1950. #define width  256

  1951. #define height 256

  1952.     int buffer[2][width*height];

  1953.     SnowContext s;

  1954.     int i;

  1955.     AVLFG prng;

  1956.     s.spatial_decomposition_count=6;

  1957.     s.spatial_decomposition_type=1;

  1958. 

  1959.     s.temp_dwt_buffer  = av_mallocz_array(width, sizeof(DWTELEM));

  1960.     s.temp_idwt_buffer = av_mallocz_array(width, sizeof(IDWTELEM));

  1961. 

  1962.     if (!s.temp_dwt_buffer || !s.temp_idwt_buffer) {

  1963.         fprintf(stderr, "Failed to allocate memory\n");

  1964.         return 1;

  1965.     }

  1966. 

  1967.     av_lfg_init(&prng, 1);

  1968. 

  1969.     printf("testing 5/3 DWT\n");

  1970.     for(i=0; i<width*height; i++)

  1971.         buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;

  1972. 

  1973.     ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);

  1974.     ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);

  1975. 

  1976.     for(i=0; i<width*height; i++)

  1977.         if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);

  1978. 

  1979.     printf("testing 9/7 DWT\n");

  1980.     s.spatial_decomposition_type=0;

  1981.     for(i=0; i<width*height; i++)

  1982.         buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;

  1983. 

  1984.     ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);

  1985.     ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);

  1986. 

  1987.     for(i=0; i<width*height; i++)

  1988.         if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);

  1989. 

  1990.     {

  1991.     int level, orientation, x, y;

  1992.     int64_t errors[8][4];

  1993.     int64_t g=0;

  1994. 

  1995.         memset(errors, 0, sizeof(errors));

  1996.         s.spatial_decomposition_count=3;

  1997.         s.spatial_decomposition_type=0;

  1998.         for(level=0; level<s.spatial_decomposition_count; level++){

  1999.             for(orientation=level ? 1 : 0; orientation<4; orientation++){

  2000.                 int w= width  >> (s.spatial_decomposition_count-level);

  2001.                 int h= height >> (s.spatial_decomposition_count-level);

  2002.                 int stride= width  << (s.spatial_decomposition_count-level);

  2003.                 DWTELEM *buf= buffer[0];

  2004.                 int64_t error=0;

  2005. 

  2006.                 if(orientation&1) buf+=w;

  2007.                 if(orientation>1) buf+=stride>>1;

  2008. 

  2009.                 memset(buffer[0], 0, sizeof(int)*width*height);

  2010.                 buf[w/2 + h/2*stride]= 256*256;

  2011.                 ff_spatial_idwt((IDWTELEM*)buffer[0], s.temp_idwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);

  2012.                 for(y=0; y<height; y++){

  2013.                     for(x=0; x<width; x++){

  2014.                         int64_t d= buffer[0][x + y*width];

  2015.                         error += d*d;

  2016.                         if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);

  2017.                     }

  2018.                     if(FFABS(height/2-y)<9 && level==2) printf("\n");

  2019.                 }

  2020.                 error= (int)(sqrt(error)+0.5);

  2021.                 errors[level][orientation]= error;

  2022.                 if(g) g=av_gcd(g, error);

  2023.                 else g= error;

  2024.             }

  2025.         }

  2026.         printf("static int const visual_weight[][4]={\n");

  2027.         for(level=0; level<s.spatial_decomposition_count; level++){

  2028.             printf("  {");

  2029.             for(orientation=0; orientation<4; orientation++){

  2030.                 printf("%8"PRId64",", errors[level][orientation]/g);

  2031.             }

  2032.             printf("},\n");

  2033.         }

  2034.         printf("};\n");

  2035.         {

  2036.             int level=2;

  2037.             int w= width  >> (s.spatial_decomposition_count-level);

  2038.             //int h= height >> (s.spatial_decomposition_count-level);

  2039.             int stride= width  << (s.spatial_decomposition_count-level);

  2040.             DWTELEM *buf= buffer[0];

  2041.             int64_t error=0;

  2042. 

  2043.             buf+=w;

  2044.             buf+=stride>>1;

  2045. 

  2046.             memset(buffer[0], 0, sizeof(int)*width*height);

  2047.             for(y=0; y<height; y++){

  2048.                 for(x=0; x<width; x++){

  2049.                     int tab[4]={0,2,3,1};

  2050.                     buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];

  2051.                 }

  2052.             }

  2053.             ff_spatial_dwt(buffer[0], s.temp_dwt_buffer, width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);

  2054.             for(y=0; y<height; y++){

  2055.                 for(x=0; x<width; x++){

  2056.                     int64_t d= buffer[0][x + y*width];

  2057.                     error += d*d;

  2058.                     if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);

  2059.                 }

  2060.                 if(FFABS(height/2-y)<9) printf("\n");

  2061.             }

  2062.         }

  2063. 

  2064.     }

  2065.     return 0;

  2066. }

  2067. #endif /* TEST */