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00021 #include "libavutil/intmath.h"
00022 #include "libavutil/log.h"
00023 #include "libavutil/opt.h"
00024 #include "avcodec.h"
00025 #include "dsputil.h"
00026 #include "dwt.h"
00027 #include "snow.h"
00028
00029 #include "rangecoder.h"
00030 #include "mathops.h"
00031
00032 #include "mpegvideo.h"
00033 #include "h263.h"
00034
00035 #undef NDEBUG
00036 #include <assert.h>
00037
00038 #define QUANTIZE2 0
00039
00040 #if QUANTIZE2==1
00041 #define Q2_STEP 8
00042
00043 static void find_sse(SnowContext *s, Plane *p, int *score, int score_stride, IDWTELEM *r0, IDWTELEM *r1, int level, int orientation){
00044 SubBand *b= &p->band[level][orientation];
00045 int x, y;
00046 int xo=0;
00047 int yo=0;
00048 int step= 1 << (s->spatial_decomposition_count - level);
00049
00050 if(orientation&1)
00051 xo= step>>1;
00052 if(orientation&2)
00053 yo= step>>1;
00054
00055
00056
00057 memset(score, 0, sizeof(*score)*score_stride*((p->height + Q2_STEP-1)/Q2_STEP));
00058 for(y=0; y<p->height; y++){
00059 for(x=0; x<p->width; x++){
00060 int sx= (x-xo + step/2) / step / Q2_STEP;
00061 int sy= (y-yo + step/2) / step / Q2_STEP;
00062 int v= r0[x + y*p->width] - r1[x + y*p->width];
00063 assert(sx>=0 && sy>=0 && sx < score_stride);
00064 v= ((v+8)>>4)<<4;
00065 score[sx + sy*score_stride] += v*v;
00066 assert(score[sx + sy*score_stride] >= 0);
00067 }
00068 }
00069 }
00070
00071 static void dequantize_all(SnowContext *s, Plane *p, IDWTELEM *buffer, int width, int height){
00072 int level, orientation;
00073
00074 for(level=0; level<s->spatial_decomposition_count; level++){
00075 for(orientation=level ? 1 : 0; orientation<4; orientation++){
00076 SubBand *b= &p->band[level][orientation];
00077 IDWTELEM *dst= buffer + (b->ibuf - s->spatial_idwt_buffer);
00078
00079 dequantize(s, b, dst, b->stride);
00080 }
00081 }
00082 }
00083
00084 static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, int height, int stride, int type){
00085 int level, orientation, ys, xs, x, y, pass;
00086 IDWTELEM best_dequant[height * stride];
00087 IDWTELEM idwt2_buffer[height * stride];
00088 const int score_stride= (width + 10)/Q2_STEP;
00089 int best_score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP];
00090 int score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP];
00091 int threshold= (s->m.lambda * s->m.lambda) >> 6;
00092
00093
00094
00095
00096 ff_spatial_dwt(buffer, width, height, stride, type, s->spatial_decomposition_count);
00097
00098 for(level=0; level<s->spatial_decomposition_count; level++){
00099 for(orientation=level ? 1 : 0; orientation<4; orientation++){
00100 SubBand *b= &p->band[level][orientation];
00101 IDWTELEM *dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
00102 DWTELEM *src= buffer + (b-> buf - s->spatial_dwt_buffer);
00103 assert(src == b->buf);
00104
00105 quantize(s, b, dst, src, b->stride, s->qbias);
00106 }
00107 }
00108 for(pass=0; pass<1; pass++){
00109 if(s->qbias == 0)
00110 continue;
00111 for(level=0; level<s->spatial_decomposition_count; level++){
00112 for(orientation=level ? 1 : 0; orientation<4; orientation++){
00113 SubBand *b= &p->band[level][orientation];
00114 IDWTELEM *dst= idwt2_buffer + (b->ibuf - s->spatial_idwt_buffer);
00115 IDWTELEM *best_dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
00116
00117 for(ys= 0; ys<Q2_STEP; ys++){
00118 for(xs= 0; xs<Q2_STEP; xs++){
00119 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
00120 dequantize_all(s, p, idwt2_buffer, width, height);
00121 ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
00122 find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
00123 memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
00124 for(y=ys; y<b->height; y+= Q2_STEP){
00125 for(x=xs; x<b->width; x+= Q2_STEP){
00126 if(dst[x + y*b->stride]<0) dst[x + y*b->stride]++;
00127 if(dst[x + y*b->stride]>0) dst[x + y*b->stride]--;
00128
00129 }
00130 }
00131 dequantize_all(s, p, idwt2_buffer, width, height);
00132 ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
00133 find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
00134 for(y=ys; y<b->height; y+= Q2_STEP){
00135 for(x=xs; x<b->width; x+= Q2_STEP){
00136 int score_idx= x/Q2_STEP + (y/Q2_STEP)*score_stride;
00137 if(score[score_idx] <= best_score[score_idx] + threshold){
00138 best_score[score_idx]= score[score_idx];
00139 if(best_dst[x + y*b->stride]<0) best_dst[x + y*b->stride]++;
00140 if(best_dst[x + y*b->stride]>0) best_dst[x + y*b->stride]--;
00141
00142 }
00143 }
00144 }
00145 }
00146 }
00147 }
00148 }
00149 }
00150 memcpy(s->spatial_idwt_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
00151 }
00152
00153 #endif
00154
00155 #if CONFIG_SNOW_ENCODER
00156 static av_cold int encode_init(AVCodecContext *avctx)
00157 {
00158 SnowContext *s = avctx->priv_data;
00159 int plane_index, ret;
00160
00161 if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
00162 av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
00163 "Use vstrict=-2 / -strict -2 to use it anyway.\n");
00164 return -1;
00165 }
00166
00167 if(avctx->prediction_method == DWT_97
00168 && (avctx->flags & CODEC_FLAG_QSCALE)
00169 && avctx->global_quality == 0){
00170 av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
00171 return -1;
00172 }
00173
00174 s->spatial_decomposition_type= avctx->prediction_method;
00175
00176 s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
00177 s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
00178
00179 for(plane_index=0; plane_index<3; plane_index++){
00180 s->plane[plane_index].diag_mc= 1;
00181 s->plane[plane_index].htaps= 6;
00182 s->plane[plane_index].hcoeff[0]= 40;
00183 s->plane[plane_index].hcoeff[1]= -10;
00184 s->plane[plane_index].hcoeff[2]= 2;
00185 s->plane[plane_index].fast_mc= 1;
00186 }
00187
00188 if ((ret = ff_snow_common_init(avctx)) < 0) {
00189 ff_snow_common_end(avctx->priv_data);
00190 return ret;
00191 }
00192 ff_snow_alloc_blocks(s);
00193
00194 s->version=0;
00195
00196 s->m.avctx = avctx;
00197 s->m.flags = avctx->flags;
00198 s->m.bit_rate= avctx->bit_rate;
00199
00200 s->m.me.temp =
00201 s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
00202 s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
00203 s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
00204 s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
00205 ff_h263_encode_init(&s->m);
00206
00207 s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
00208
00209 if(avctx->flags&CODEC_FLAG_PASS1){
00210 if(!avctx->stats_out)
00211 avctx->stats_out = av_mallocz(256);
00212 }
00213 if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
00214 if(ff_rate_control_init(&s->m) < 0)
00215 return -1;
00216 }
00217 s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
00218
00219 avctx->coded_frame= &s->current_picture;
00220 switch(avctx->pix_fmt){
00221
00222
00223 case PIX_FMT_YUV420P:
00224
00225
00226
00227 s->colorspace_type= 0;
00228 break;
00229
00230
00231
00232 default:
00233 av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
00234 return -1;
00235 }
00236
00237 s->chroma_h_shift= 1;
00238 s->chroma_v_shift= 1;
00239
00240 ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
00241 ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
00242
00243 s->avctx->get_buffer(s->avctx, &s->input_picture);
00244
00245 if(s->avctx->me_method == ME_ITER){
00246 int i;
00247 int size= s->b_width * s->b_height << 2*s->block_max_depth;
00248 for(i=0; i<s->max_ref_frames; i++){
00249 s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
00250 s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
00251 }
00252 }
00253
00254 return 0;
00255 }
00256
00257
00258 static int pix_sum(uint8_t * pix, int line_size, int w)
00259 {
00260 int s, i, j;
00261
00262 s = 0;
00263 for (i = 0; i < w; i++) {
00264 for (j = 0; j < w; j++) {
00265 s += pix[0];
00266 pix ++;
00267 }
00268 pix += line_size - w;
00269 }
00270 return s;
00271 }
00272
00273
00274 static int pix_norm1(uint8_t * pix, int line_size, int w)
00275 {
00276 int s, i, j;
00277 uint32_t *sq = ff_squareTbl + 256;
00278
00279 s = 0;
00280 for (i = 0; i < w; i++) {
00281 for (j = 0; j < w; j ++) {
00282 s += sq[pix[0]];
00283 pix ++;
00284 }
00285 pix += line_size - w;
00286 }
00287 return s;
00288 }
00289
00290
00291 #define P_LEFT P[1]
00292 #define P_TOP P[2]
00293 #define P_TOPRIGHT P[3]
00294 #define P_MEDIAN P[4]
00295 #define P_MV1 P[9]
00296 #define FLAG_QPEL 1 //must be 1
00297
00298 static int encode_q_branch(SnowContext *s, int level, int x, int y){
00299 uint8_t p_buffer[1024];
00300 uint8_t i_buffer[1024];
00301 uint8_t p_state[sizeof(s->block_state)];
00302 uint8_t i_state[sizeof(s->block_state)];
00303 RangeCoder pc, ic;
00304 uint8_t *pbbak= s->c.bytestream;
00305 uint8_t *pbbak_start= s->c.bytestream_start;
00306 int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
00307 const int w= s->b_width << s->block_max_depth;
00308 const int h= s->b_height << s->block_max_depth;
00309 const int rem_depth= s->block_max_depth - level;
00310 const int index= (x + y*w) << rem_depth;
00311 const int block_w= 1<<(LOG2_MB_SIZE - level);
00312 int trx= (x+1)<<rem_depth;
00313 int try= (y+1)<<rem_depth;
00314 const BlockNode *left = x ? &s->block[index-1] : &null_block;
00315 const BlockNode *top = y ? &s->block[index-w] : &null_block;
00316 const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
00317 const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
00318 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
00319 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl;
00320 int pl = left->color[0];
00321 int pcb= left->color[1];
00322 int pcr= left->color[2];
00323 int pmx, pmy;
00324 int mx=0, my=0;
00325 int l,cr,cb;
00326 const int stride= s->current_picture.linesize[0];
00327 const int uvstride= s->current_picture.linesize[1];
00328 uint8_t *current_data[3]= { s->input_picture.data[0] + (x + y* stride)*block_w,
00329 s->input_picture.data[1] + (x + y*uvstride)*block_w/2,
00330 s->input_picture.data[2] + (x + y*uvstride)*block_w/2};
00331 int P[10][2];
00332 int16_t last_mv[3][2];
00333 int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL);
00334 const int shift= 1+qpel;
00335 MotionEstContext *c= &s->m.me;
00336 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
00337 int mx_context= av_log2(2*FFABS(left->mx - top->mx));
00338 int my_context= av_log2(2*FFABS(left->my - top->my));
00339 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
00340 int ref, best_ref, ref_score, ref_mx, ref_my;
00341
00342 assert(sizeof(s->block_state) >= 256);
00343 if(s->keyframe){
00344 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
00345 return 0;
00346 }
00347
00348
00349
00350 P_LEFT[0]= left->mx;
00351 P_LEFT[1]= left->my;
00352 P_TOP [0]= top->mx;
00353 P_TOP [1]= top->my;
00354 P_TOPRIGHT[0]= tr->mx;
00355 P_TOPRIGHT[1]= tr->my;
00356
00357 last_mv[0][0]= s->block[index].mx;
00358 last_mv[0][1]= s->block[index].my;
00359 last_mv[1][0]= right->mx;
00360 last_mv[1][1]= right->my;
00361 last_mv[2][0]= bottom->mx;
00362 last_mv[2][1]= bottom->my;
00363
00364 s->m.mb_stride=2;
00365 s->m.mb_x=
00366 s->m.mb_y= 0;
00367 c->skip= 0;
00368
00369 assert(c-> stride == stride);
00370 assert(c->uvstride == uvstride);
00371
00372 c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
00373 c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
00374 c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
00375 c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
00376
00377 c->xmin = - x*block_w - 16+3;
00378 c->ymin = - y*block_w - 16+3;
00379 c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
00380 c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
00381
00382 if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
00383 if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
00384 if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
00385 if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
00386 if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
00387 if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift);
00388 if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
00389
00390 P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
00391 P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
00392
00393 if (!y) {
00394 c->pred_x= P_LEFT[0];
00395 c->pred_y= P_LEFT[1];
00396 } else {
00397 c->pred_x = P_MEDIAN[0];
00398 c->pred_y = P_MEDIAN[1];
00399 }
00400
00401 score= INT_MAX;
00402 best_ref= 0;
00403 for(ref=0; ref<s->ref_frames; ref++){
00404 init_ref(c, current_data, s->last_picture[ref].data, NULL, block_w*x, block_w*y, 0);
00405
00406 ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, 0, last_mv,
00407 (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
00408
00409 assert(ref_mx >= c->xmin);
00410 assert(ref_mx <= c->xmax);
00411 assert(ref_my >= c->ymin);
00412 assert(ref_my <= c->ymax);
00413
00414 ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
00415 ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
00416 ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
00417 if(s->ref_mvs[ref]){
00418 s->ref_mvs[ref][index][0]= ref_mx;
00419 s->ref_mvs[ref][index][1]= ref_my;
00420 s->ref_scores[ref][index]= ref_score;
00421 }
00422 if(score > ref_score){
00423 score= ref_score;
00424 best_ref= ref;
00425 mx= ref_mx;
00426 my= ref_my;
00427 }
00428 }
00429
00430
00431
00432 base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
00433 pc= s->c;
00434 pc.bytestream_start=
00435 pc.bytestream= p_buffer;
00436 memcpy(p_state, s->block_state, sizeof(s->block_state));
00437
00438 if(level!=s->block_max_depth)
00439 put_rac(&pc, &p_state[4 + s_context], 1);
00440 put_rac(&pc, &p_state[1 + left->type + top->type], 0);
00441 if(s->ref_frames > 1)
00442 put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
00443 pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
00444 put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
00445 put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
00446 p_len= pc.bytestream - pc.bytestream_start;
00447 score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
00448
00449 block_s= block_w*block_w;
00450 sum = pix_sum(current_data[0], stride, block_w);
00451 l= (sum + block_s/2)/block_s;
00452 iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
00453
00454 block_s= block_w*block_w>>2;
00455 sum = pix_sum(current_data[1], uvstride, block_w>>1);
00456 cb= (sum + block_s/2)/block_s;
00457
00458 sum = pix_sum(current_data[2], uvstride, block_w>>1);
00459 cr= (sum + block_s/2)/block_s;
00460
00461
00462 ic= s->c;
00463 ic.bytestream_start=
00464 ic.bytestream= i_buffer;
00465 memcpy(i_state, s->block_state, sizeof(s->block_state));
00466 if(level!=s->block_max_depth)
00467 put_rac(&ic, &i_state[4 + s_context], 1);
00468 put_rac(&ic, &i_state[1 + left->type + top->type], 1);
00469 put_symbol(&ic, &i_state[32], l-pl , 1);
00470 put_symbol(&ic, &i_state[64], cb-pcb, 1);
00471 put_symbol(&ic, &i_state[96], cr-pcr, 1);
00472 i_len= ic.bytestream - ic.bytestream_start;
00473 iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
00474
00475
00476 assert(iscore < 255*255*256 + s->lambda2*10);
00477 assert(iscore >= 0);
00478 assert(l>=0 && l<=255);
00479 assert(pl>=0 && pl<=255);
00480
00481 if(level==0){
00482 int varc= iscore >> 8;
00483 int vard= score >> 8;
00484 if (vard <= 64 || vard < varc)
00485 c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
00486 else
00487 c->scene_change_score+= s->m.qscale;
00488 }
00489
00490 if(level!=s->block_max_depth){
00491 put_rac(&s->c, &s->block_state[4 + s_context], 0);
00492 score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
00493 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
00494 score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
00495 score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
00496 score2+= s->lambda2>>FF_LAMBDA_SHIFT;
00497
00498 if(score2 < score && score2 < iscore)
00499 return score2;
00500 }
00501
00502 if(iscore < score){
00503 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
00504 memcpy(pbbak, i_buffer, i_len);
00505 s->c= ic;
00506 s->c.bytestream_start= pbbak_start;
00507 s->c.bytestream= pbbak + i_len;
00508 set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
00509 memcpy(s->block_state, i_state, sizeof(s->block_state));
00510 return iscore;
00511 }else{
00512 memcpy(pbbak, p_buffer, p_len);
00513 s->c= pc;
00514 s->c.bytestream_start= pbbak_start;
00515 s->c.bytestream= pbbak + p_len;
00516 set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
00517 memcpy(s->block_state, p_state, sizeof(s->block_state));
00518 return score;
00519 }
00520 }
00521
00522 static void encode_q_branch2(SnowContext *s, int level, int x, int y){
00523 const int w= s->b_width << s->block_max_depth;
00524 const int rem_depth= s->block_max_depth - level;
00525 const int index= (x + y*w) << rem_depth;
00526 int trx= (x+1)<<rem_depth;
00527 BlockNode *b= &s->block[index];
00528 const BlockNode *left = x ? &s->block[index-1] : &null_block;
00529 const BlockNode *top = y ? &s->block[index-w] : &null_block;
00530 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
00531 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl;
00532 int pl = left->color[0];
00533 int pcb= left->color[1];
00534 int pcr= left->color[2];
00535 int pmx, pmy;
00536 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
00537 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
00538 int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
00539 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
00540
00541 if(s->keyframe){
00542 set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
00543 return;
00544 }
00545
00546 if(level!=s->block_max_depth){
00547 if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
00548 put_rac(&s->c, &s->block_state[4 + s_context], 1);
00549 }else{
00550 put_rac(&s->c, &s->block_state[4 + s_context], 0);
00551 encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
00552 encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
00553 encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
00554 encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
00555 return;
00556 }
00557 }
00558 if(b->type & BLOCK_INTRA){
00559 pred_mv(s, &pmx, &pmy, 0, left, top, tr);
00560 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
00561 put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
00562 put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
00563 put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
00564 set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
00565 }else{
00566 pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
00567 put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
00568 if(s->ref_frames > 1)
00569 put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
00570 put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
00571 put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
00572 set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
00573 }
00574 }
00575
00576 static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
00577 int i, x2, y2;
00578 Plane *p= &s->plane[plane_index];
00579 const int block_size = MB_SIZE >> s->block_max_depth;
00580 const int block_w = plane_index ? block_size/2 : block_size;
00581 const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
00582 const int obmc_stride= plane_index ? block_size : 2*block_size;
00583 const int ref_stride= s->current_picture.linesize[plane_index];
00584 uint8_t *src= s-> input_picture.data[plane_index];
00585 IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
00586 const int b_stride = s->b_width << s->block_max_depth;
00587 const int w= p->width;
00588 const int h= p->height;
00589 int index= mb_x + mb_y*b_stride;
00590 BlockNode *b= &s->block[index];
00591 BlockNode backup= *b;
00592 int ab=0;
00593 int aa=0;
00594
00595 b->type|= BLOCK_INTRA;
00596 b->color[plane_index]= 0;
00597 memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
00598
00599 for(i=0; i<4; i++){
00600 int mb_x2= mb_x + (i &1) - 1;
00601 int mb_y2= mb_y + (i>>1) - 1;
00602 int x= block_w*mb_x2 + block_w/2;
00603 int y= block_w*mb_y2 + block_w/2;
00604
00605 add_yblock(s, 0, NULL, dst + ((i&1)+(i>>1)*obmc_stride)*block_w, NULL, obmc,
00606 x, y, block_w, block_w, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
00607
00608 for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_w); y2++){
00609 for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
00610 int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_w*mb_y - block_w/2))*obmc_stride;
00611 int obmc_v= obmc[index];
00612 int d;
00613 if(y<0) obmc_v += obmc[index + block_w*obmc_stride];
00614 if(x<0) obmc_v += obmc[index + block_w];
00615 if(y+block_w>h) obmc_v += obmc[index - block_w*obmc_stride];
00616 if(x+block_w>w) obmc_v += obmc[index - block_w];
00617
00618
00619 d = -dst[index] + (1<<(FRAC_BITS-1));
00620 dst[index] = d;
00621 ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
00622 aa += obmc_v * obmc_v;
00623 }
00624 }
00625 }
00626 *b= backup;
00627
00628 return av_clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255);
00629 }
00630
00631 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
00632 const int b_stride = s->b_width << s->block_max_depth;
00633 const int b_height = s->b_height<< s->block_max_depth;
00634 int index= x + y*b_stride;
00635 const BlockNode *b = &s->block[index];
00636 const BlockNode *left = x ? &s->block[index-1] : &null_block;
00637 const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
00638 const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
00639 const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
00640 int dmx, dmy;
00641
00642
00643
00644 if(x<0 || x>=b_stride || y>=b_height)
00645 return 0;
00646
00647
00648
00649
00650
00651
00652
00653
00654
00655 if(b->type & BLOCK_INTRA){
00656 return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
00657 + av_log2(2*FFABS(left->color[1] - b->color[1]))
00658 + av_log2(2*FFABS(left->color[2] - b->color[2])));
00659 }else{
00660 pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
00661 dmx-= b->mx;
00662 dmy-= b->my;
00663 return 2*(1 + av_log2(2*FFABS(dmx))
00664 + av_log2(2*FFABS(dmy))
00665 + av_log2(2*b->ref));
00666 }
00667 }
00668
00669 static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, const uint8_t *obmc_edged){
00670 Plane *p= &s->plane[plane_index];
00671 const int block_size = MB_SIZE >> s->block_max_depth;
00672 const int block_w = plane_index ? block_size/2 : block_size;
00673 const int obmc_stride= plane_index ? block_size : 2*block_size;
00674 const int ref_stride= s->current_picture.linesize[plane_index];
00675 uint8_t *dst= s->current_picture.data[plane_index];
00676 uint8_t *src= s-> input_picture.data[plane_index];
00677 IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
00678 uint8_t *cur = s->scratchbuf;
00679 uint8_t tmp[ref_stride*(2*MB_SIZE+HTAPS_MAX-1)];
00680 const int b_stride = s->b_width << s->block_max_depth;
00681 const int b_height = s->b_height<< s->block_max_depth;
00682 const int w= p->width;
00683 const int h= p->height;
00684 int distortion;
00685 int rate= 0;
00686 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
00687 int sx= block_w*mb_x - block_w/2;
00688 int sy= block_w*mb_y - block_w/2;
00689 int x0= FFMAX(0,-sx);
00690 int y0= FFMAX(0,-sy);
00691 int x1= FFMIN(block_w*2, w-sx);
00692 int y1= FFMIN(block_w*2, h-sy);
00693 int i,x,y;
00694
00695 ff_snow_pred_block(s, cur, tmp, ref_stride, sx, sy, block_w*2, block_w*2, &s->block[mb_x + mb_y*b_stride], plane_index, w, h);
00696
00697 for(y=y0; y<y1; y++){
00698 const uint8_t *obmc1= obmc_edged + y*obmc_stride;
00699 const IDWTELEM *pred1 = pred + y*obmc_stride;
00700 uint8_t *cur1 = cur + y*ref_stride;
00701 uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
00702 for(x=x0; x<x1; x++){
00703 #if FRAC_BITS >= LOG2_OBMC_MAX
00704 int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
00705 #else
00706 int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
00707 #endif
00708 v = (v + pred1[x]) >> FRAC_BITS;
00709 if(v&(~255)) v= ~(v>>31);
00710 dst1[x] = v;
00711 }
00712 }
00713
00714
00715 if(LOG2_OBMC_MAX == 8
00716 && (mb_x == 0 || mb_x == b_stride-1)
00717 && (mb_y == 0 || mb_y == b_height-1)){
00718 if(mb_x == 0)
00719 x1 = block_w;
00720 else
00721 x0 = block_w;
00722 if(mb_y == 0)
00723 y1 = block_w;
00724 else
00725 y0 = block_w;
00726 for(y=y0; y<y1; y++)
00727 memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
00728 }
00729
00730 if(block_w==16){
00731
00732
00733
00734
00735
00736
00737 if(s->avctx->me_cmp == FF_CMP_W97)
00738 distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
00739 else if(s->avctx->me_cmp == FF_CMP_W53)
00740 distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
00741 else{
00742 distortion = 0;
00743 for(i=0; i<4; i++){
00744 int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
00745 distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
00746 }
00747 }
00748 }else{
00749 assert(block_w==8);
00750 distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
00751 }
00752
00753 if(plane_index==0){
00754 for(i=0; i<4; i++){
00755
00756
00757
00758
00759 rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
00760 }
00761 if(mb_x == b_stride-2)
00762 rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
00763 }
00764 return distortion + rate*penalty_factor;
00765 }
00766
00767 static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
00768 int i, y2;
00769 Plane *p= &s->plane[plane_index];
00770 const int block_size = MB_SIZE >> s->block_max_depth;
00771 const int block_w = plane_index ? block_size/2 : block_size;
00772 const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
00773 const int obmc_stride= plane_index ? block_size : 2*block_size;
00774 const int ref_stride= s->current_picture.linesize[plane_index];
00775 uint8_t *dst= s->current_picture.data[plane_index];
00776 uint8_t *src= s-> input_picture.data[plane_index];
00777
00778
00779 static IDWTELEM zero_dst[4096];
00780 const int b_stride = s->b_width << s->block_max_depth;
00781 const int w= p->width;
00782 const int h= p->height;
00783 int distortion= 0;
00784 int rate= 0;
00785 const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
00786
00787 for(i=0; i<9; i++){
00788 int mb_x2= mb_x + (i%3) - 1;
00789 int mb_y2= mb_y + (i/3) - 1;
00790 int x= block_w*mb_x2 + block_w/2;
00791 int y= block_w*mb_y2 + block_w/2;
00792
00793 add_yblock(s, 0, NULL, zero_dst, dst, obmc,
00794 x, y, block_w, block_w, w, h, 0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
00795
00796
00797 for(y2= y; y2<0; y2++)
00798 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
00799 for(y2= h; y2<y+block_w; y2++)
00800 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
00801 if(x<0){
00802 for(y2= y; y2<y+block_w; y2++)
00803 memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
00804 }
00805 if(x+block_w > w){
00806 for(y2= y; y2<y+block_w; y2++)
00807 memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
00808 }
00809
00810 assert(block_w== 8 || block_w==16);
00811 distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_w);
00812 }
00813
00814 if(plane_index==0){
00815 BlockNode *b= &s->block[mb_x+mb_y*b_stride];
00816 int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
00817
00818
00819
00820
00821
00822
00823 if(merged)
00824 rate = get_block_bits(s, mb_x, mb_y, 2);
00825 for(i=merged?4:0; i<9; i++){
00826 static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
00827 rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
00828 }
00829 }
00830 return distortion + rate*penalty_factor;
00831 }
00832
00833 static int encode_subband_c0run(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
00834 const int w= b->width;
00835 const int h= b->height;
00836 int x, y;
00837
00838 if(1){
00839 int run=0;
00840 int runs[w*h];
00841 int run_index=0;
00842 int max_index;
00843
00844 for(y=0; y<h; y++){
00845 for(x=0; x<w; x++){
00846 int v, p=0;
00847 int l=0, lt=0, t=0, rt=0;
00848 v= src[x + y*stride];
00849
00850 if(y){
00851 t= src[x + (y-1)*stride];
00852 if(x){
00853 lt= src[x - 1 + (y-1)*stride];
00854 }
00855 if(x + 1 < w){
00856 rt= src[x + 1 + (y-1)*stride];
00857 }
00858 }
00859 if(x){
00860 l= src[x - 1 + y*stride];
00861
00862
00863
00864
00865 }
00866 if(parent){
00867 int px= x>>1;
00868 int py= y>>1;
00869 if(px<b->parent->width && py<b->parent->height)
00870 p= parent[px + py*2*stride];
00871 }
00872 if(!(l|lt|t|rt|p)){
00873 if(v){
00874 runs[run_index++]= run;
00875 run=0;
00876 }else{
00877 run++;
00878 }
00879 }
00880 }
00881 }
00882 max_index= run_index;
00883 runs[run_index++]= run;
00884 run_index=0;
00885 run= runs[run_index++];
00886
00887 put_symbol2(&s->c, b->state[30], max_index, 0);
00888 if(run_index <= max_index)
00889 put_symbol2(&s->c, b->state[1], run, 3);
00890
00891 for(y=0; y<h; y++){
00892 if(s->c.bytestream_end - s->c.bytestream < w*40){
00893 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
00894 return -1;
00895 }
00896 for(x=0; x<w; x++){
00897 int v, p=0;
00898 int l=0, lt=0, t=0, rt=0;
00899 v= src[x + y*stride];
00900
00901 if(y){
00902 t= src[x + (y-1)*stride];
00903 if(x){
00904 lt= src[x - 1 + (y-1)*stride];
00905 }
00906 if(x + 1 < w){
00907 rt= src[x + 1 + (y-1)*stride];
00908 }
00909 }
00910 if(x){
00911 l= src[x - 1 + y*stride];
00912
00913
00914
00915
00916 }
00917 if(parent){
00918 int px= x>>1;
00919 int py= y>>1;
00920 if(px<b->parent->width && py<b->parent->height)
00921 p= parent[px + py*2*stride];
00922 }
00923 if(l|lt|t|rt|p){
00924 int context= av_log2(3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
00925
00926 put_rac(&s->c, &b->state[0][context], !!v);
00927 }else{
00928 if(!run){
00929 run= runs[run_index++];
00930
00931 if(run_index <= max_index)
00932 put_symbol2(&s->c, b->state[1], run, 3);
00933 assert(v);
00934 }else{
00935 run--;
00936 assert(!v);
00937 }
00938 }
00939 if(v){
00940 int context= av_log2(3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
00941 int l2= 2*FFABS(l) + (l<0);
00942 int t2= 2*FFABS(t) + (t<0);
00943
00944 put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
00945 put_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l2&0xFF] + 3*quant3bA[t2&0xFF]], v<0);
00946 }
00947 }
00948 }
00949 }
00950 return 0;
00951 }
00952
00953 static int encode_subband(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
00954
00955
00956 return encode_subband_c0run(s, b, src, parent, stride, orientation);
00957
00958 }
00959
00960 static av_always_inline int check_block(SnowContext *s, int mb_x, int mb_y, int p[3], int intra, const uint8_t *obmc_edged, int *best_rd){
00961 const int b_stride= s->b_width << s->block_max_depth;
00962 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
00963 BlockNode backup= *block;
00964 unsigned value;
00965 int rd, index;
00966
00967 assert(mb_x>=0 && mb_y>=0);
00968 assert(mb_x<b_stride);
00969
00970 if(intra){
00971 block->color[0] = p[0];
00972 block->color[1] = p[1];
00973 block->color[2] = p[2];
00974 block->type |= BLOCK_INTRA;
00975 }else{
00976 index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
00977 value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
00978 if(s->me_cache[index] == value)
00979 return 0;
00980 s->me_cache[index]= value;
00981
00982 block->mx= p[0];
00983 block->my= p[1];
00984 block->type &= ~BLOCK_INTRA;
00985 }
00986
00987 rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
00988
00989
00990 if(rd < *best_rd){
00991 *best_rd= rd;
00992 return 1;
00993 }else{
00994 *block= backup;
00995 return 0;
00996 }
00997 }
00998
00999
01000
01001 static av_always_inline int check_block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, const uint8_t *obmc_edged, int *best_rd){
01002 int p[2] = {p0, p1};
01003 return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
01004 }
01005
01006 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){
01007 const int b_stride= s->b_width << s->block_max_depth;
01008 BlockNode *block= &s->block[mb_x + mb_y * b_stride];
01009 BlockNode backup[4]= {block[0], block[1], block[b_stride], block[b_stride+1]};
01010 unsigned value;
01011 int rd, index;
01012
01013 assert(mb_x>=0 && mb_y>=0);
01014 assert(mb_x<b_stride);
01015 assert(((mb_x|mb_y)&1) == 0);
01016
01017 index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
01018 value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
01019 if(s->me_cache[index] == value)
01020 return 0;
01021 s->me_cache[index]= value;
01022
01023 block->mx= p0;
01024 block->my= p1;
01025 block->ref= ref;
01026 block->type &= ~BLOCK_INTRA;
01027 block[1]= block[b_stride]= block[b_stride+1]= *block;
01028
01029 rd= get_4block_rd(s, mb_x, mb_y, 0);
01030
01031
01032 if(rd < *best_rd){
01033 *best_rd= rd;
01034 return 1;
01035 }else{
01036 block[0]= backup[0];
01037 block[1]= backup[1];
01038 block[b_stride]= backup[2];
01039 block[b_stride+1]= backup[3];
01040 return 0;
01041 }
01042 }
01043
01044 static void iterative_me(SnowContext *s){
01045 int pass, mb_x, mb_y;
01046 const int b_width = s->b_width << s->block_max_depth;
01047 const int b_height= s->b_height << s->block_max_depth;
01048 const int b_stride= b_width;
01049 int color[3];
01050
01051 {
01052 RangeCoder r = s->c;
01053 uint8_t state[sizeof(s->block_state)];
01054 memcpy(state, s->block_state, sizeof(s->block_state));
01055 for(mb_y= 0; mb_y<s->b_height; mb_y++)
01056 for(mb_x= 0; mb_x<s->b_width; mb_x++)
01057 encode_q_branch(s, 0, mb_x, mb_y);
01058 s->c = r;
01059 memcpy(s->block_state, state, sizeof(s->block_state));
01060 }
01061
01062 for(pass=0; pass<25; pass++){
01063 int change= 0;
01064
01065 for(mb_y= 0; mb_y<b_height; mb_y++){
01066 for(mb_x= 0; mb_x<b_width; mb_x++){
01067 int dia_change, i, j, ref;
01068 int best_rd= INT_MAX, ref_rd;
01069 BlockNode backup, ref_b;
01070 const int index= mb_x + mb_y * b_stride;
01071 BlockNode *block= &s->block[index];
01072 BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
01073 BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
01074 BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
01075 BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
01076 BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
01077 BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
01078 BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
01079 BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
01080 const int b_w= (MB_SIZE >> s->block_max_depth);
01081 uint8_t obmc_edged[b_w*2][b_w*2];
01082
01083 if(pass && (block->type & BLOCK_OPT))
01084 continue;
01085 block->type |= BLOCK_OPT;
01086
01087 backup= *block;
01088
01089 if(!s->me_cache_generation)
01090 memset(s->me_cache, 0, sizeof(s->me_cache));
01091 s->me_cache_generation += 1<<22;
01092
01093
01094 {
01095 int x, y;
01096 memcpy(obmc_edged, obmc_tab[s->block_max_depth], b_w*b_w*4);
01097 if(mb_x==0)
01098 for(y=0; y<b_w*2; y++)
01099 memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
01100 if(mb_x==b_stride-1)
01101 for(y=0; y<b_w*2; y++)
01102 memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
01103 if(mb_y==0){
01104 for(x=0; x<b_w*2; x++)
01105 obmc_edged[0][x] += obmc_edged[b_w-1][x];
01106 for(y=1; y<b_w; y++)
01107 memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
01108 }
01109 if(mb_y==b_height-1){
01110 for(x=0; x<b_w*2; x++)
01111 obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
01112 for(y=b_w; y<b_w*2-1; y++)
01113 memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
01114 }
01115 }
01116
01117
01118 if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
01119 uint8_t *src= s-> input_picture.data[0];
01120 uint8_t *dst= s->current_picture.data[0];
01121 const int stride= s->current_picture.linesize[0];
01122 const int block_w= MB_SIZE >> s->block_max_depth;
01123 const int sx= block_w*mb_x - block_w/2;
01124 const int sy= block_w*mb_y - block_w/2;
01125 const int w= s->plane[0].width;
01126 const int h= s->plane[0].height;
01127 int y;
01128
01129 for(y=sy; y<0; y++)
01130 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
01131 for(y=h; y<sy+block_w*2; y++)
01132 memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
01133 if(sx<0){
01134 for(y=sy; y<sy+block_w*2; y++)
01135 memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
01136 }
01137 if(sx+block_w*2 > w){
01138 for(y=sy; y<sy+block_w*2; y++)
01139 memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
01140 }
01141 }
01142
01143
01144 for(i=0; i<3; i++)
01145 color[i]= get_dc(s, mb_x, mb_y, i);
01146
01147
01148 if(pass > 0 && (block->type&BLOCK_INTRA)){
01149 int color0[3]= {block->color[0], block->color[1], block->color[2]};
01150 check_block(s, mb_x, mb_y, color0, 1, *obmc_edged, &best_rd);
01151 }else
01152 check_block_inter(s, mb_x, mb_y, block->mx, block->my, *obmc_edged, &best_rd);
01153
01154 ref_b= *block;
01155 ref_rd= best_rd;
01156 for(ref=0; ref < s->ref_frames; ref++){
01157 int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
01158 if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2)
01159 continue;
01160 block->ref= ref;
01161 best_rd= INT_MAX;
01162
01163 check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], *obmc_edged, &best_rd);
01164 check_block_inter(s, mb_x, mb_y, 0, 0, *obmc_edged, &best_rd);
01165 if(tb)
01166 check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], *obmc_edged, &best_rd);
01167 if(lb)
01168 check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], *obmc_edged, &best_rd);
01169 if(rb)
01170 check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], *obmc_edged, &best_rd);
01171 if(bb)
01172 check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], *obmc_edged, &best_rd);
01173
01174
01175
01176 do{
01177 dia_change=0;
01178 for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
01179 for(j=0; j<i; j++){
01180 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
01181 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
01182 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
01183 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
01184 }
01185 }
01186 }while(dia_change);
01187
01188 do{
01189 static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
01190 dia_change=0;
01191 for(i=0; i<8; i++)
01192 dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], *obmc_edged, &best_rd);
01193 }while(dia_change);
01194
01195
01196 mvr[0][0]= block->mx;
01197 mvr[0][1]= block->my;
01198 if(ref_rd > best_rd){
01199 ref_rd= best_rd;
01200 ref_b= *block;
01201 }
01202 }
01203 best_rd= ref_rd;
01204 *block= ref_b;
01205 check_block(s, mb_x, mb_y, color, 1, *obmc_edged, &best_rd);
01206
01207 if(!same_block(block, &backup)){
01208 if(tb ) tb ->type &= ~BLOCK_OPT;
01209 if(lb ) lb ->type &= ~BLOCK_OPT;
01210 if(rb ) rb ->type &= ~BLOCK_OPT;
01211 if(bb ) bb ->type &= ~BLOCK_OPT;
01212 if(tlb) tlb->type &= ~BLOCK_OPT;
01213 if(trb) trb->type &= ~BLOCK_OPT;
01214 if(blb) blb->type &= ~BLOCK_OPT;
01215 if(brb) brb->type &= ~BLOCK_OPT;
01216 change ++;
01217 }
01218 }
01219 }
01220 av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
01221 if(!change)
01222 break;
01223 }
01224
01225 if(s->block_max_depth == 1){
01226 int change= 0;
01227 for(mb_y= 0; mb_y<b_height; mb_y+=2){
01228 for(mb_x= 0; mb_x<b_width; mb_x+=2){
01229 int i;
01230 int best_rd, init_rd;
01231 const int index= mb_x + mb_y * b_stride;
01232 BlockNode *b[4];
01233
01234 b[0]= &s->block[index];
01235 b[1]= b[0]+1;
01236 b[2]= b[0]+b_stride;
01237 b[3]= b[2]+1;
01238 if(same_block(b[0], b[1]) &&
01239 same_block(b[0], b[2]) &&
01240 same_block(b[0], b[3]))
01241 continue;
01242
01243 if(!s->me_cache_generation)
01244 memset(s->me_cache, 0, sizeof(s->me_cache));
01245 s->me_cache_generation += 1<<22;
01246
01247 init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
01248
01249
01250 check_4block_inter(s, mb_x, mb_y,
01251 (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
01252 (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
01253
01254 for(i=0; i<4; i++)
01255 if(!(b[i]->type&BLOCK_INTRA))
01256 check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
01257
01258 if(init_rd != best_rd)
01259 change++;
01260 }
01261 }
01262 av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
01263 }
01264 }
01265
01266 static void encode_blocks(SnowContext *s, int search){
01267 int x, y;
01268 int w= s->b_width;
01269 int h= s->b_height;
01270
01271 if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
01272 iterative_me(s);
01273
01274 for(y=0; y<h; y++){
01275 if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){
01276 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
01277 return;
01278 }
01279 for(x=0; x<w; x++){
01280 if(s->avctx->me_method == ME_ITER || !search)
01281 encode_q_branch2(s, 0, x, y);
01282 else
01283 encode_q_branch (s, 0, x, y);
01284 }
01285 }
01286 }
01287
01288 static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
01289 const int w= b->width;
01290 const int h= b->height;
01291 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
01292 const int qmul= qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
01293 int x,y, thres1, thres2;
01294
01295 if(s->qlog == LOSSLESS_QLOG){
01296 for(y=0; y<h; y++)
01297 for(x=0; x<w; x++)
01298 dst[x + y*stride]= src[x + y*stride];
01299 return;
01300 }
01301
01302 bias= bias ? 0 : (3*qmul)>>3;
01303 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
01304 thres2= 2*thres1;
01305
01306 if(!bias){
01307 for(y=0; y<h; y++){
01308 for(x=0; x<w; x++){
01309 int i= src[x + y*stride];
01310
01311 if((unsigned)(i+thres1) > thres2){
01312 if(i>=0){
01313 i<<= QEXPSHIFT;
01314 i/= qmul;
01315 dst[x + y*stride]= i;
01316 }else{
01317 i= -i;
01318 i<<= QEXPSHIFT;
01319 i/= qmul;
01320 dst[x + y*stride]= -i;
01321 }
01322 }else
01323 dst[x + y*stride]= 0;
01324 }
01325 }
01326 }else{
01327 for(y=0; y<h; y++){
01328 for(x=0; x<w; x++){
01329 int i= src[x + y*stride];
01330
01331 if((unsigned)(i+thres1) > thres2){
01332 if(i>=0){
01333 i<<= QEXPSHIFT;
01334 i= (i + bias) / qmul;
01335 dst[x + y*stride]= i;
01336 }else{
01337 i= -i;
01338 i<<= QEXPSHIFT;
01339 i= (i + bias) / qmul;
01340 dst[x + y*stride]= -i;
01341 }
01342 }else
01343 dst[x + y*stride]= 0;
01344 }
01345 }
01346 }
01347 }
01348
01349 static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
01350 const int w= b->width;
01351 const int h= b->height;
01352 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
01353 const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
01354 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
01355 int x,y;
01356
01357 if(s->qlog == LOSSLESS_QLOG) return;
01358
01359 for(y=0; y<h; y++){
01360 for(x=0; x<w; x++){
01361 int i= src[x + y*stride];
01362 if(i<0){
01363 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT));
01364 }else if(i>0){
01365 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
01366 }
01367 }
01368 }
01369 }
01370
01371 static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
01372 const int w= b->width;
01373 const int h= b->height;
01374 int x,y;
01375
01376 for(y=h-1; y>=0; y--){
01377 for(x=w-1; x>=0; x--){
01378 int i= x + y*stride;
01379
01380 if(x){
01381 if(use_median){
01382 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
01383 else src[i] -= src[i - 1];
01384 }else{
01385 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
01386 else src[i] -= src[i - 1];
01387 }
01388 }else{
01389 if(y) src[i] -= src[i - stride];
01390 }
01391 }
01392 }
01393 }
01394
01395 static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
01396 const int w= b->width;
01397 const int h= b->height;
01398 int x,y;
01399
01400 for(y=0; y<h; y++){
01401 for(x=0; x<w; x++){
01402 int i= x + y*stride;
01403
01404 if(x){
01405 if(use_median){
01406 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
01407 else src[i] += src[i - 1];
01408 }else{
01409 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
01410 else src[i] += src[i - 1];
01411 }
01412 }else{
01413 if(y) src[i] += src[i - stride];
01414 }
01415 }
01416 }
01417 }
01418
01419 static void encode_qlogs(SnowContext *s){
01420 int plane_index, level, orientation;
01421
01422 for(plane_index=0; plane_index<2; plane_index++){
01423 for(level=0; level<s->spatial_decomposition_count; level++){
01424 for(orientation=level ? 1:0; orientation<4; orientation++){
01425 if(orientation==2) continue;
01426 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
01427 }
01428 }
01429 }
01430 }
01431
01432 static void encode_header(SnowContext *s){
01433 int plane_index, i;
01434 uint8_t kstate[32];
01435
01436 memset(kstate, MID_STATE, sizeof(kstate));
01437
01438 put_rac(&s->c, kstate, s->keyframe);
01439 if(s->keyframe || s->always_reset){
01440 ff_snow_reset_contexts(s);
01441 s->last_spatial_decomposition_type=
01442 s->last_qlog=
01443 s->last_qbias=
01444 s->last_mv_scale=
01445 s->last_block_max_depth= 0;
01446 for(plane_index=0; plane_index<2; plane_index++){
01447 Plane *p= &s->plane[plane_index];
01448 p->last_htaps=0;
01449 p->last_diag_mc=0;
01450 memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
01451 }
01452 }
01453 if(s->keyframe){
01454 put_symbol(&s->c, s->header_state, s->version, 0);
01455 put_rac(&s->c, s->header_state, s->always_reset);
01456 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
01457 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
01458 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
01459 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
01460 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
01461 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
01462 put_rac(&s->c, s->header_state, s->spatial_scalability);
01463
01464 put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
01465
01466 encode_qlogs(s);
01467 }
01468
01469 if(!s->keyframe){
01470 int update_mc=0;
01471 for(plane_index=0; plane_index<2; plane_index++){
01472 Plane *p= &s->plane[plane_index];
01473 update_mc |= p->last_htaps != p->htaps;
01474 update_mc |= p->last_diag_mc != p->diag_mc;
01475 update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
01476 }
01477 put_rac(&s->c, s->header_state, update_mc);
01478 if(update_mc){
01479 for(plane_index=0; plane_index<2; plane_index++){
01480 Plane *p= &s->plane[plane_index];
01481 put_rac(&s->c, s->header_state, p->diag_mc);
01482 put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
01483 for(i= p->htaps/2; i; i--)
01484 put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
01485 }
01486 }
01487 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
01488 put_rac(&s->c, s->header_state, 1);
01489 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
01490 encode_qlogs(s);
01491 }else
01492 put_rac(&s->c, s->header_state, 0);
01493 }
01494
01495 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
01496 put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
01497 put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
01498 put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
01499 put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
01500
01501 }
01502
01503 static void update_last_header_values(SnowContext *s){
01504 int plane_index;
01505
01506 if(!s->keyframe){
01507 for(plane_index=0; plane_index<2; plane_index++){
01508 Plane *p= &s->plane[plane_index];
01509 p->last_diag_mc= p->diag_mc;
01510 p->last_htaps = p->htaps;
01511 memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
01512 }
01513 }
01514
01515 s->last_spatial_decomposition_type = s->spatial_decomposition_type;
01516 s->last_qlog = s->qlog;
01517 s->last_qbias = s->qbias;
01518 s->last_mv_scale = s->mv_scale;
01519 s->last_block_max_depth = s->block_max_depth;
01520 s->last_spatial_decomposition_count = s->spatial_decomposition_count;
01521 }
01522
01523 static int qscale2qlog(int qscale){
01524 return rint(QROOT*log(qscale / (float)FF_QP2LAMBDA)/log(2))
01525 + 61*QROOT/8;
01526 }
01527
01528 static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
01529 {
01530
01531
01532
01533 uint32_t coef_sum= 0;
01534 int level, orientation, delta_qlog;
01535
01536 for(level=0; level<s->spatial_decomposition_count; level++){
01537 for(orientation=level ? 1 : 0; orientation<4; orientation++){
01538 SubBand *b= &s->plane[0].band[level][orientation];
01539 IDWTELEM *buf= b->ibuf;
01540 const int w= b->width;
01541 const int h= b->height;
01542 const int stride= b->stride;
01543 const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
01544 const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
01545 const int qdiv= (1<<16)/qmul;
01546 int x, y;
01547
01548 for(y=0; y<h; y++)
01549 for(x=0; x<w; x++)
01550 buf[x+y*stride]= b->buf[x+y*stride];
01551 if(orientation==0)
01552 decorrelate(s, b, buf, stride, 1, 0);
01553 for(y=0; y<h; y++)
01554 for(x=0; x<w; x++)
01555 coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
01556 }
01557 }
01558
01559
01560 coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
01561 assert(coef_sum < INT_MAX);
01562
01563 if(pict->pict_type == AV_PICTURE_TYPE_I){
01564 s->m.current_picture.mb_var_sum= coef_sum;
01565 s->m.current_picture.mc_mb_var_sum= 0;
01566 }else{
01567 s->m.current_picture.mc_mb_var_sum= coef_sum;
01568 s->m.current_picture.mb_var_sum= 0;
01569 }
01570
01571 pict->quality= ff_rate_estimate_qscale(&s->m, 1);
01572 if (pict->quality < 0)
01573 return INT_MIN;
01574 s->lambda= pict->quality * 3/2;
01575 delta_qlog= qscale2qlog(pict->quality) - s->qlog;
01576 s->qlog+= delta_qlog;
01577 return delta_qlog;
01578 }
01579
01580 static void calculate_visual_weight(SnowContext *s, Plane *p){
01581 int width = p->width;
01582 int height= p->height;
01583 int level, orientation, x, y;
01584
01585 for(level=0; level<s->spatial_decomposition_count; level++){
01586 for(orientation=level ? 1 : 0; orientation<4; orientation++){
01587 SubBand *b= &p->band[level][orientation];
01588 IDWTELEM *ibuf= b->ibuf;
01589 int64_t error=0;
01590
01591 memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
01592 ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
01593 ff_spatial_idwt(s->spatial_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
01594 for(y=0; y<height; y++){
01595 for(x=0; x<width; x++){
01596 int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
01597 error += d*d;
01598 }
01599 }
01600
01601 b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
01602 }
01603 }
01604 }
01605
01606 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
01607 SnowContext *s = avctx->priv_data;
01608 RangeCoder * const c= &s->c;
01609 AVFrame *pict = data;
01610 const int width= s->avctx->width;
01611 const int height= s->avctx->height;
01612 int level, orientation, plane_index, i, y;
01613 uint8_t rc_header_bak[sizeof(s->header_state)];
01614 uint8_t rc_block_bak[sizeof(s->block_state)];
01615
01616 ff_init_range_encoder(c, buf, buf_size);
01617 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
01618
01619 for(i=0; i<3; i++){
01620 int shift= !!i;
01621 for(y=0; y<(height>>shift); y++)
01622 memcpy(&s->input_picture.data[i][y * s->input_picture.linesize[i]],
01623 &pict->data[i][y * pict->linesize[i]],
01624 width>>shift);
01625 }
01626 s->new_picture = *pict;
01627
01628 s->m.picture_number= avctx->frame_number;
01629 if(avctx->flags&CODEC_FLAG_PASS2){
01630 s->m.pict_type =
01631 pict->pict_type= s->m.rc_context.entry[avctx->frame_number].new_pict_type;
01632 s->keyframe= pict->pict_type==AV_PICTURE_TYPE_I;
01633 if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
01634 pict->quality= ff_rate_estimate_qscale(&s->m, 0);
01635 if (pict->quality < 0)
01636 return -1;
01637 }
01638 }else{
01639 s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
01640 s->m.pict_type=
01641 pict->pict_type= s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
01642 }
01643
01644 if(s->pass1_rc && avctx->frame_number == 0)
01645 pict->quality= 2*FF_QP2LAMBDA;
01646 if(pict->quality){
01647 s->qlog= qscale2qlog(pict->quality);
01648 s->lambda = pict->quality * 3/2;
01649 }
01650 if(s->qlog < 0 || (!pict->quality && (avctx->flags & CODEC_FLAG_QSCALE))){
01651 s->qlog= LOSSLESS_QLOG;
01652 s->lambda = 0;
01653 }
01654
01655 ff_snow_frame_start(s);
01656
01657 s->m.current_picture_ptr= &s->m.current_picture;
01658 s->m.last_picture.f.pts = s->m.current_picture.f.pts;
01659 s->m.current_picture.f.pts = pict->pts;
01660 if(pict->pict_type == AV_PICTURE_TYPE_P){
01661 int block_width = (width +15)>>4;
01662 int block_height= (height+15)>>4;
01663 int stride= s->current_picture.linesize[0];
01664
01665 assert(s->current_picture.data[0]);
01666 assert(s->last_picture[0].data[0]);
01667
01668 s->m.avctx= s->avctx;
01669 s->m.current_picture.f.data[0] = s->current_picture.data[0];
01670 s->m. last_picture.f.data[0] = s->last_picture[0].data[0];
01671 s->m. new_picture.f.data[0] = s-> input_picture.data[0];
01672 s->m. last_picture_ptr= &s->m. last_picture;
01673 s->m.linesize=
01674 s->m. last_picture.f.linesize[0] =
01675 s->m. new_picture.f.linesize[0] =
01676 s->m.current_picture.f.linesize[0] = stride;
01677 s->m.uvlinesize= s->current_picture.linesize[1];
01678 s->m.width = width;
01679 s->m.height= height;
01680 s->m.mb_width = block_width;
01681 s->m.mb_height= block_height;
01682 s->m.mb_stride= s->m.mb_width+1;
01683 s->m.b8_stride= 2*s->m.mb_width+1;
01684 s->m.f_code=1;
01685 s->m.pict_type= pict->pict_type;
01686 s->m.me_method= s->avctx->me_method;
01687 s->m.me.scene_change_score=0;
01688 s->m.flags= s->avctx->flags;
01689 s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
01690 s->m.out_format= FMT_H263;
01691 s->m.unrestricted_mv= 1;
01692
01693 s->m.lambda = s->lambda;
01694 s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
01695 s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
01696
01697 s->m.dsp= s->dsp;
01698 ff_init_me(&s->m);
01699 s->dsp= s->m.dsp;
01700 }
01701
01702 if(s->pass1_rc){
01703 memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
01704 memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
01705 }
01706
01707 redo_frame:
01708
01709 if(pict->pict_type == AV_PICTURE_TYPE_I)
01710 s->spatial_decomposition_count= 5;
01711 else
01712 s->spatial_decomposition_count= 5;
01713
01714 s->m.pict_type = pict->pict_type;
01715 s->qbias= pict->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
01716
01717 ff_snow_common_init_after_header(avctx);
01718
01719 if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
01720 for(plane_index=0; plane_index<3; plane_index++){
01721 calculate_visual_weight(s, &s->plane[plane_index]);
01722 }
01723 }
01724
01725 encode_header(s);
01726 s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
01727 encode_blocks(s, 1);
01728 s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
01729
01730 for(plane_index=0; plane_index<3; plane_index++){
01731 Plane *p= &s->plane[plane_index];
01732 int w= p->width;
01733 int h= p->height;
01734 int x, y;
01735
01736
01737 if (!s->memc_only) {
01738
01739 if(pict->data[plane_index])
01740 for(y=0; y<h; y++){
01741 for(x=0; x<w; x++){
01742 s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
01743 }
01744 }
01745 predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
01746
01747 if( plane_index==0
01748 && pict->pict_type == AV_PICTURE_TYPE_P
01749 && !(avctx->flags&CODEC_FLAG_PASS2)
01750 && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
01751 ff_init_range_encoder(c, buf, buf_size);
01752 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
01753 pict->pict_type= AV_PICTURE_TYPE_I;
01754 s->keyframe=1;
01755 s->current_picture.key_frame=1;
01756 goto redo_frame;
01757 }
01758
01759 if(s->qlog == LOSSLESS_QLOG){
01760 for(y=0; y<h; y++){
01761 for(x=0; x<w; x++){
01762 s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
01763 }
01764 }
01765 }else{
01766 for(y=0; y<h; y++){
01767 for(x=0; x<w; x++){
01768 s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
01769 }
01770 }
01771 }
01772
01773
01774
01775
01776 ff_spatial_dwt(s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
01777
01778 if(s->pass1_rc && plane_index==0){
01779 int delta_qlog = ratecontrol_1pass(s, pict);
01780 if (delta_qlog <= INT_MIN)
01781 return -1;
01782 if(delta_qlog){
01783
01784 ff_init_range_encoder(c, buf, buf_size);
01785 memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
01786 memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
01787 encode_header(s);
01788 encode_blocks(s, 0);
01789 }
01790 }
01791
01792 for(level=0; level<s->spatial_decomposition_count; level++){
01793 for(orientation=level ? 1 : 0; orientation<4; orientation++){
01794 SubBand *b= &p->band[level][orientation];
01795
01796 if(!QUANTIZE2)
01797 quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
01798 if(orientation==0)
01799 decorrelate(s, b, b->ibuf, b->stride, pict->pict_type == AV_PICTURE_TYPE_P, 0);
01800 encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
01801 assert(b->parent==NULL || b->parent->stride == b->stride*2);
01802 if(orientation==0)
01803 correlate(s, b, b->ibuf, b->stride, 1, 0);
01804 }
01805 }
01806
01807 for(level=0; level<s->spatial_decomposition_count; level++){
01808 for(orientation=level ? 1 : 0; orientation<4; orientation++){
01809 SubBand *b= &p->band[level][orientation];
01810
01811 dequantize(s, b, b->ibuf, b->stride);
01812 }
01813 }
01814
01815 ff_spatial_idwt(s->spatial_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
01816 if(s->qlog == LOSSLESS_QLOG){
01817 for(y=0; y<h; y++){
01818 for(x=0; x<w; x++){
01819 s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
01820 }
01821 }
01822 }
01823 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
01824 }else{
01825
01826 if(pict->pict_type == AV_PICTURE_TYPE_I){
01827 for(y=0; y<h; y++){
01828 for(x=0; x<w; x++){
01829 s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x]=
01830 pict->data[plane_index][y*pict->linesize[plane_index] + x];
01831 }
01832 }
01833 }else{
01834 memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
01835 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
01836 }
01837 }
01838 if(s->avctx->flags&CODEC_FLAG_PSNR){
01839 int64_t error= 0;
01840
01841 if(pict->data[plane_index])
01842 for(y=0; y<h; y++){
01843 for(x=0; x<w; x++){
01844 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];
01845 error += d*d;
01846 }
01847 }
01848 s->avctx->error[plane_index] += error;
01849 s->current_picture.error[plane_index] = error;
01850 }
01851
01852 }
01853
01854 update_last_header_values(s);
01855
01856 ff_snow_release_buffer(avctx);
01857
01858 s->current_picture.coded_picture_number = avctx->frame_number;
01859 s->current_picture.pict_type = pict->pict_type;
01860 s->current_picture.quality = pict->quality;
01861 s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
01862 s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
01863 s->m.current_picture.f.display_picture_number =
01864 s->m.current_picture.f.coded_picture_number = avctx->frame_number;
01865 s->m.current_picture.f.quality = pict->quality;
01866 s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
01867 if(s->pass1_rc)
01868 if (ff_rate_estimate_qscale(&s->m, 0) < 0)
01869 return -1;
01870 if(avctx->flags&CODEC_FLAG_PASS1)
01871 ff_write_pass1_stats(&s->m);
01872 s->m.last_pict_type = s->m.pict_type;
01873 avctx->frame_bits = s->m.frame_bits;
01874 avctx->mv_bits = s->m.mv_bits;
01875 avctx->misc_bits = s->m.misc_bits;
01876 avctx->p_tex_bits = s->m.p_tex_bits;
01877
01878 emms_c();
01879
01880 return ff_rac_terminate(c);
01881 }
01882
01883 static av_cold int encode_end(AVCodecContext *avctx)
01884 {
01885 SnowContext *s = avctx->priv_data;
01886
01887 ff_snow_common_end(s);
01888 if (s->input_picture.data[0])
01889 avctx->release_buffer(avctx, &s->input_picture);
01890 av_free(avctx->stats_out);
01891
01892 return 0;
01893 }
01894
01895 #define OFFSET(x) offsetof(SnowContext, x)
01896 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
01897 static const AVOption options[] = {
01898 { "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
01899 { NULL },
01900 };
01901
01902 static const AVClass snowenc_class = {
01903 .class_name = "snow encoder",
01904 .item_name = av_default_item_name,
01905 .option = options,
01906 .version = LIBAVUTIL_VERSION_INT,
01907 };
01908
01909 AVCodec ff_snow_encoder = {
01910 .name = "snow",
01911 .type = AVMEDIA_TYPE_VIDEO,
01912 .id = CODEC_ID_SNOW,
01913 .priv_data_size = sizeof(SnowContext),
01914 .init = encode_init,
01915 .encode = encode_frame,
01916 .close = encode_end,
01917 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
01918 .priv_class = &snowenc_class,
01919 };
01920 #endif
01921
01922
01923 #ifdef TEST
01924 #undef malloc
01925 #undef free
01926 #undef printf
01927
01928 #include "libavutil/lfg.h"
01929 #include "libavutil/mathematics.h"
01930
01931 int main(void){
01932 int width=256;
01933 int height=256;
01934 int buffer[2][width*height];
01935 SnowContext s;
01936 int i;
01937 AVLFG prng;
01938 s.spatial_decomposition_count=6;
01939 s.spatial_decomposition_type=1;
01940
01941 av_lfg_init(&prng, 1);
01942
01943 printf("testing 5/3 DWT\n");
01944 for(i=0; i<width*height; i++)
01945 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
01946
01947 ff_spatial_dwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
01948 ff_spatial_idwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
01949
01950 for(i=0; i<width*height; i++)
01951 if(buffer[0][i]!= buffer[1][i]) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
01952
01953 printf("testing 9/7 DWT\n");
01954 s.spatial_decomposition_type=0;
01955 for(i=0; i<width*height; i++)
01956 buffer[0][i] = buffer[1][i] = av_lfg_get(&prng) % 54321 - 12345;
01957
01958 ff_spatial_dwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
01959 ff_spatial_idwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
01960
01961 for(i=0; i<width*height; i++)
01962 if(FFABS(buffer[0][i] - buffer[1][i])>20) printf("fsck: %6d %12d %7d\n",i, buffer[0][i], buffer[1][i]);
01963
01964 {
01965 int level, orientation, x, y;
01966 int64_t errors[8][4];
01967 int64_t g=0;
01968
01969 memset(errors, 0, sizeof(errors));
01970 s.spatial_decomposition_count=3;
01971 s.spatial_decomposition_type=0;
01972 for(level=0; level<s.spatial_decomposition_count; level++){
01973 for(orientation=level ? 1 : 0; orientation<4; orientation++){
01974 int w= width >> (s.spatial_decomposition_count-level);
01975 int h= height >> (s.spatial_decomposition_count-level);
01976 int stride= width << (s.spatial_decomposition_count-level);
01977 DWTELEM *buf= buffer[0];
01978 int64_t error=0;
01979
01980 if(orientation&1) buf+=w;
01981 if(orientation>1) buf+=stride>>1;
01982
01983 memset(buffer[0], 0, sizeof(int)*width*height);
01984 buf[w/2 + h/2*stride]= 256*256;
01985 ff_spatial_idwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
01986 for(y=0; y<height; y++){
01987 for(x=0; x<width; x++){
01988 int64_t d= buffer[0][x + y*width];
01989 error += d*d;
01990 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9 && level==2) printf("%8"PRId64" ", d);
01991 }
01992 if(FFABS(height/2-y)<9 && level==2) printf("\n");
01993 }
01994 error= (int)(sqrt(error)+0.5);
01995 errors[level][orientation]= error;
01996 if(g) g=av_gcd(g, error);
01997 else g= error;
01998 }
01999 }
02000 printf("static int const visual_weight[][4]={\n");
02001 for(level=0; level<s.spatial_decomposition_count; level++){
02002 printf(" {");
02003 for(orientation=0; orientation<4; orientation++){
02004 printf("%8"PRId64",", errors[level][orientation]/g);
02005 }
02006 printf("},\n");
02007 }
02008 printf("};\n");
02009 {
02010 int level=2;
02011 int w= width >> (s.spatial_decomposition_count-level);
02012
02013 int stride= width << (s.spatial_decomposition_count-level);
02014 DWTELEM *buf= buffer[0];
02015 int64_t error=0;
02016
02017 buf+=w;
02018 buf+=stride>>1;
02019
02020 memset(buffer[0], 0, sizeof(int)*width*height);
02021 for(y=0; y<height; y++){
02022 for(x=0; x<width; x++){
02023 int tab[4]={0,2,3,1};
02024 buffer[0][x+width*y]= 256*256*tab[(x&1) + 2*(y&1)];
02025 }
02026 }
02027 ff_spatial_dwt(buffer[0], width, height, width, s.spatial_decomposition_type, s.spatial_decomposition_count);
02028 for(y=0; y<height; y++){
02029 for(x=0; x<width; x++){
02030 int64_t d= buffer[0][x + y*width];
02031 error += d*d;
02032 if(FFABS(width/2-x)<9 && FFABS(height/2-y)<9) printf("%8"PRId64" ", d);
02033 }
02034 if(FFABS(height/2-y)<9) printf("\n");
02035 }
02036 }
02037
02038 }
02039 return 0;
02040 }
02041 #endif