libavcodec/svq1enc.c

   1 /*
   2  * SVQ1 Encoder
   3  * Copyright (C) 2004 Mike Melanson <melanson@pcisys.net>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file libavcodec/svq1enc.c
  24  * Sorenson Vector Quantizer #1 (SVQ1) video codec.
  25  * For more information of the SVQ1 algorithm, visit:
  26  *   http://www.pcisys.net/~melanson/codecs/
  27  */
  28
  29
  30 #include "avcodec.h"
  31 #include "dsputil.h"
  32 #include "mpegvideo.h"
  33
  34 #include "svq1.h"
  35 #include "svq1enc_cb.h"
  36
  37 #undef NDEBUG
  38 #include <assert.h>
  39
  40
  41 typedef struct SVQ1Context {
  42     MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independent of MpegEncContext, so this will be removed then (FIXME/XXX)
  43     AVCodecContext *avctx;
  44     DSPContext dsp;
  45     AVFrame picture;
  46     AVFrame current_picture;
  47     AVFrame last_picture;
  48     PutBitContext pb;
  49     GetBitContext gb;
  50
  51     PutBitContext reorder_pb[6]; //why ooh why this sick breadth first order, everything is slower and more complex
  52
  53     int frame_width;
  54     int frame_height;
  55
  56     /* Y plane block dimensions */
  57     int y_block_width;
  58     int y_block_height;
  59
  60     /* U & V plane (C planes) block dimensions */
  61     int c_block_width;
  62     int c_block_height;
  63
  64     uint16_t *mb_type;
  65     uint32_t *dummy;
  66     int16_t (*motion_val8[3])[2];
  67     int16_t (*motion_val16[3])[2];
  68
  69     int64_t rd_total;
  70
  71     uint8_t *scratchbuf;
  72 } SVQ1Context;
  73
  74 static void svq1_write_header(SVQ1Context *s, int frame_type)
  75 {
  76     int i;
  77
  78     /* frame code */
  79     put_bits(&s->pb, 22, 0x20);
  80
  81     /* temporal reference (sure hope this is a "don't care") */
  82     put_bits(&s->pb, 8, 0x00);
  83
  84     /* frame type */
  85     put_bits(&s->pb, 2, frame_type - 1);
  86
  87     if (frame_type == FF_I_TYPE) {
  88
  89         /* no checksum since frame code is 0x20 */
  90
  91         /* no embedded string either */
  92
  93         /* output 5 unknown bits (2 + 2 + 1) */
  94         put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
  95
  96         for (i = 0; i < 7; i++)
  97         {
  98             if ((ff_svq1_frame_size_table[i].width == s->frame_width) &&
  99                 (ff_svq1_frame_size_table[i].height == s->frame_height))
 100             {
 101                 put_bits(&s->pb, 3, i);
 102                 break;
 103             }
 104         }
 105
 106         if (i == 7)
 107         {
 108             put_bits(&s->pb, 3, 7);
 109                 put_bits(&s->pb, 12, s->frame_width);
 110                 put_bits(&s->pb, 12, s->frame_height);
 111         }
 112     }
 113
 114     /* no checksum or extra data (next 2 bits get 0) */
 115     put_bits(&s->pb, 2, 0);
 116 }
 117
 118
 119 #define QUALITY_THRESHOLD 100
 120 #define THRESHOLD_MULTIPLIER 0.6
 121
 122 #if HAVE_ALTIVEC
 123 #undef vector
 124 #endif
 125
 126 static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *decoded, int stride, int level, int threshold, int lambda, int intra){
 127     int count, y, x, i, j, split, best_mean, best_score, best_count;
 128     int best_vector[6];
 129     int block_sum[7]= {0, 0, 0, 0, 0, 0};
 130     int w= 2<<((level+2)>>1);
 131     int h= 2<<((level+1)>>1);
 132     int size=w*h;
 133     int16_t block[7][256];
 134     const int8_t *codebook_sum, *codebook;
 135     const uint16_t (*mean_vlc)[2];
 136     const uint8_t (*multistage_vlc)[2];
 137
 138     best_score=0;
 139     //FIXME optimize, this doenst need to be done multiple times
 140     if(intra){
 141         codebook_sum= svq1_intra_codebook_sum[level];
 142         codebook= ff_svq1_intra_codebooks[level];
 143         mean_vlc= ff_svq1_intra_mean_vlc;
 144         multistage_vlc= ff_svq1_intra_multistage_vlc[level];
 145         for(y=0; y<h; y++){
 146             for(x=0; x<w; x++){
 147                 int v= src[x + y*stride];
 148                 block[0][x + w*y]= v;
 149                 best_score += v*v;
 150                 block_sum[0] += v;
 151             }
 152         }
 153     }else{
 154         codebook_sum= svq1_inter_codebook_sum[level];
 155         codebook= ff_svq1_inter_codebooks[level];
 156         mean_vlc= ff_svq1_inter_mean_vlc + 256;
 157         multistage_vlc= ff_svq1_inter_multistage_vlc[level];
 158         for(y=0; y<h; y++){
 159             for(x=0; x<w; x++){
 160                 int v= src[x + y*stride] - ref[x + y*stride];
 161                 block[0][x + w*y]= v;
 162                 best_score += v*v;
 163                 block_sum[0] += v;
 164             }
 165         }
 166     }
 167
 168     best_count=0;
 169     best_score -= ((block_sum[0]*block_sum[0])>>(level+3));
 170     best_mean= (block_sum[0] + (size>>1)) >> (level+3);
 171
 172     if(level<4){
 173         for(count=1; count<7; count++){
 174             int best_vector_score= INT_MAX;
 175             int best_vector_sum=-999, best_vector_mean=-999;
 176             const int stage= count-1;
 177             const int8_t *vector;
 178
 179             for(i=0; i<16; i++){
 180                 int sum= codebook_sum[stage*16 + i];
 181                 int sqr, diff, score;
 182
 183                 vector = codebook + stage*size*16 + i*size;
 184                 sqr = s->dsp.ssd_int8_vs_int16(vector, block[stage], size);
 185                 diff= block_sum[stage] - sum;
 186                 score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
 187                 if(score < best_vector_score){
 188                     int mean= (diff + (size>>1)) >> (level+3);
 189                     assert(mean >-300 && mean<300);
 190                     mean= av_clip(mean, intra?0:-256, 255);
 191                     best_vector_score= score;
 192                     best_vector[stage]= i;
 193                     best_vector_sum= sum;
 194                     best_vector_mean= mean;
 195                 }
 196             }
 197             assert(best_vector_mean != -999);
 198             vector= codebook + stage*size*16 + best_vector[stage]*size;
 199             for(j=0; j<size; j++){
 200                 block[stage+1][j] = block[stage][j] - vector[j];
 201             }
 202             block_sum[stage+1]= block_sum[stage] - best_vector_sum;
 203             best_vector_score +=
 204                 lambda*(+ 1 + 4*count
 205                         + multistage_vlc[1+count][1]
 206                         + mean_vlc[best_vector_mean][1]);
 207
 208             if(best_vector_score < best_score){
 209                 best_score= best_vector_score;
 210                 best_count= count;
 211                 best_mean= best_vector_mean;
 212             }
 213         }
 214     }
 215
 216     split=0;
 217     if(best_score > threshold && level){
 218         int score=0;
 219         int offset= (level&1) ? stride*h/2 : w/2;
 220         PutBitContext backup[6];
 221
 222         for(i=level-1; i>=0; i--){
 223             backup[i]= s->reorder_pb[i];
 224         }
 225         score += encode_block(s, src         , ref         , decoded         , stride, level-1, threshold>>1, lambda, intra);
 226         score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);
 227         score += lambda;
 228
 229         if(score < best_score){
 230             best_score= score;
 231             split=1;
 232         }else{
 233             for(i=level-1; i>=0; i--){
 234                 s->reorder_pb[i]= backup[i];
 235             }
 236         }
 237     }
 238     if (level > 0)
 239         put_bits(&s->reorder_pb[level], 1, split);
 240
 241     if(!split){
 242         assert((best_mean >= 0 && best_mean<256) || !intra);
 243         assert(best_mean >= -256 && best_mean<256);
 244         assert(best_count >=0 && best_count<7);
 245         assert(level<4 || best_count==0);
 246
 247         /* output the encoding */
 248         put_bits(&s->reorder_pb[level],
 249             multistage_vlc[1 + best_count][1],
 250             multistage_vlc[1 + best_count][0]);
 251         put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
 252             mean_vlc[best_mean][0]);
 253
 254         for (i = 0; i < best_count; i++){
 255             assert(best_vector[i]>=0 && best_vector[i]<16);
 256             put_bits(&s->reorder_pb[level], 4, best_vector[i]);
 257         }
 258
 259         for(y=0; y<h; y++){
 260             for(x=0; x<w; x++){
 261                 decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;
 262             }
 263         }
 264     }
 265
 266     return best_score;
 267 }
 268
 269
 270 static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
 271     int width, int height, int src_stride, int stride)
 272 {
 273     int x, y;
 274     int i;
 275     int block_width, block_height;
 276     int level;
 277     int threshold[6];
 278     const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);
 279
 280     /* figure out the acceptable level thresholds in advance */
 281     threshold[5] = QUALITY_THRESHOLD;
 282     for (level = 4; level >= 0; level--)
 283         threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
 284
 285     block_width = (width + 15) / 16;
 286     block_height = (height + 15) / 16;
 287
 288     if(s->picture.pict_type == FF_P_TYPE){
 289         s->m.avctx= s->avctx;
 290         s->m.current_picture_ptr= &s->m.current_picture;
 291         s->m.last_picture_ptr   = &s->m.last_picture;
 292         s->m.last_picture.data[0]= ref_plane;
 293         s->m.linesize=
 294         s->m.last_picture.linesize[0]=
 295         s->m.new_picture.linesize[0]=
 296         s->m.current_picture.linesize[0]= stride;
 297         s->m.width= width;
 298         s->m.height= height;
 299         s->m.mb_width= block_width;
 300         s->m.mb_height= block_height;
 301         s->m.mb_stride= s->m.mb_width+1;
 302         s->m.b8_stride= 2*s->m.mb_width+1;
 303         s->m.f_code=1;
 304         s->m.pict_type= s->picture.pict_type;
 305         s->m.me_method= s->avctx->me_method;
 306         s->m.me.scene_change_score=0;
 307         s->m.flags= s->avctx->flags;
 308 //        s->m.out_format = FMT_H263;
 309 //        s->m.unrestricted_mv= 1;
 310
 311         s->m.lambda= s->picture.quality;
 312         s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
 313         s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
 314
 315         if(!s->motion_val8[plane]){
 316             s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));
 317             s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));
 318         }
 319
 320         s->m.mb_type= s->mb_type;
 321
 322         //dummies, to avoid segfaults
 323         s->m.current_picture.mb_mean=   (uint8_t *)s->dummy;
 324         s->m.current_picture.mb_var=    (uint16_t*)s->dummy;
 325         s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;
 326         s->m.current_picture.mb_type= s->dummy;
 327
 328         s->m.current_picture.motion_val[0]= s->motion_val8[plane] + 2;
 329         s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;
 330         s->m.dsp= s->dsp; //move
 331         ff_init_me(&s->m);
 332
 333         s->m.me.dia_size= s->avctx->dia_size;
 334         s->m.first_slice_line=1;
 335         for (y = 0; y < block_height; y++) {
 336             uint8_t src[stride*16];
 337
 338             s->m.new_picture.data[0]= src - y*16*stride; //ugly
 339             s->m.mb_y= y;
 340
 341             for(i=0; i<16 && i + 16*y<height; i++){
 342                 memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
 343                 for(x=width; x<16*block_width; x++)
 344                     src[i*stride+x]= src[i*stride+x-1];
 345             }
 346             for(; i<16 && i + 16*y<16*block_height; i++)
 347                 memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
 348
 349             for (x = 0; x < block_width; x++) {
 350                 s->m.mb_x= x;
 351                 ff_init_block_index(&s->m);
 352                 ff_update_block_index(&s->m);
 353
 354                 ff_estimate_p_frame_motion(&s->m, x, y);
 355             }
 356             s->m.first_slice_line=0;
 357         }
 358
 359         ff_fix_long_p_mvs(&s->m);
 360         ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);
 361     }
 362
 363     s->m.first_slice_line=1;
 364     for (y = 0; y < block_height; y++) {
 365         uint8_t src[stride*16];
 366
 367         for(i=0; i<16 && i + 16*y<height; i++){
 368             memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
 369             for(x=width; x<16*block_width; x++)
 370                 src[i*stride+x]= src[i*stride+x-1];
 371         }
 372         for(; i<16 && i + 16*y<16*block_height; i++)
 373             memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
 374
 375         s->m.mb_y= y;
 376         for (x = 0; x < block_width; x++) {
 377             uint8_t reorder_buffer[3][6][7*32];
 378             int count[3][6];
 379             int offset = y * 16 * stride + x * 16;
 380             uint8_t *decoded= decoded_plane + offset;
 381             uint8_t *ref= ref_plane + offset;
 382             int score[4]={0,0,0,0}, best;
 383             uint8_t *temp = s->scratchbuf;
 384
 385             if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size
 386                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 387                 return -1;
 388             }
 389
 390             s->m.mb_x= x;
 391             ff_init_block_index(&s->m);
 392             ff_update_block_index(&s->m);
 393
 394             if(s->picture.pict_type == FF_I_TYPE || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
 395                 for(i=0; i<6; i++){
 396                     init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
 397                 }
 398                 if(s->picture.pict_type == FF_P_TYPE){
 399                     const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
 400                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 401                     score[0]= vlc[1]*lambda;
 402                 }
 403                 score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
 404                 for(i=0; i<6; i++){
 405                     count[0][i]= put_bits_count(&s->reorder_pb[i]);
 406                     flush_put_bits(&s->reorder_pb[i]);
 407                 }
 408             }else
 409                 score[0]= INT_MAX;
 410
 411             best=0;
 412
 413             if(s->picture.pict_type == FF_P_TYPE){
 414                 const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
 415                 int mx, my, pred_x, pred_y, dxy;
 416                 int16_t *motion_ptr;
 417
 418                 motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
 419                 if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
 420                     for(i=0; i<6; i++)
 421                         init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
 422
 423                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 424
 425                     s->m.pb= s->reorder_pb[5];
 426                     mx= motion_ptr[0];
 427                     my= motion_ptr[1];
 428                     assert(mx>=-32 && mx<=31);
 429                     assert(my>=-32 && my<=31);
 430                     assert(pred_x>=-32 && pred_x<=31);
 431                     assert(pred_y>=-32 && pred_y<=31);
 432                     ff_h263_encode_motion(&s->m, mx - pred_x, 1);
 433                     ff_h263_encode_motion(&s->m, my - pred_y, 1);
 434                     s->reorder_pb[5]= s->m.pb;
 435                     score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
 436
 437                     dxy= (mx&1) + 2*(my&1);
 438
 439                     s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
 440
 441                     score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
 442                     best= score[1] <= score[0];
 443
 444                     vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
 445                     score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);
 446                     score[2]+= vlc[1]*lambda;
 447                     if(score[2] < score[best] && mx==0 && my==0){
 448                         best=2;
 449                         s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
 450                         for(i=0; i<6; i++){
 451                             count[2][i]=0;
 452                         }
 453                         put_bits(&s->pb, vlc[1], vlc[0]);
 454                     }
 455                 }
 456
 457                 if(best==1){
 458                     for(i=0; i<6; i++){
 459                         count[1][i]= put_bits_count(&s->reorder_pb[i]);
 460                         flush_put_bits(&s->reorder_pb[i]);
 461                     }
 462                 }else{
 463                     motion_ptr[0                 ] = motion_ptr[1                 ]=
 464                     motion_ptr[2                 ] = motion_ptr[3                 ]=
 465                     motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
 466                     motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
 467                 }
 468             }
 469
 470             s->rd_total += score[best];
 471
 472             for(i=5; i>=0; i--){
 473                 ff_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);
 474             }
 475             if(best==0){
 476                 s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
 477             }
 478         }
 479         s->m.first_slice_line=0;
 480     }
 481     return 0;
 482 }
 483
 484 static av_cold int svq1_encode_init(AVCodecContext *avctx)
 485 {
 486     SVQ1Context * const s = avctx->priv_data;
 487
 488     dsputil_init(&s->dsp, avctx);
 489     avctx->coded_frame= (AVFrame*)&s->picture;
 490
 491     s->frame_width = avctx->width;
 492     s->frame_height = avctx->height;
 493
 494     s->y_block_width = (s->frame_width + 15) / 16;
 495     s->y_block_height = (s->frame_height + 15) / 16;
 496
 497     s->c_block_width = (s->frame_width / 4 + 15) / 16;
 498     s->c_block_height = (s->frame_height / 4 + 15) / 16;
 499
 500     s->avctx= avctx;
 501     s->m.avctx= avctx;
 502     s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
 503     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 504     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 505     s->mb_type        = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
 506     s->dummy          = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
 507     h263_encode_init(&s->m); //mv_penalty
 508
 509     return 0;
 510 }
 511
 512 static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
 513     int buf_size, void *data)
 514 {
 515     SVQ1Context * const s = avctx->priv_data;
 516     AVFrame *pict = data;
 517     AVFrame * const p= (AVFrame*)&s->picture;
 518     AVFrame temp;
 519     int i;
 520
 521     if(avctx->pix_fmt != PIX_FMT_YUV410P){
 522         av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
 523         return -1;
 524     }
 525
 526     if(!s->current_picture.data[0]){
 527         avctx->get_buffer(avctx, &s->current_picture);
 528         avctx->get_buffer(avctx, &s->last_picture);
 529         s->scratchbuf = av_malloc(s->current_picture.linesize[0] * 16);
 530     }
 531
 532     temp= s->current_picture;
 533     s->current_picture= s->last_picture;
 534     s->last_picture= temp;
 535
 536     init_put_bits(&s->pb, buf, buf_size);
 537
 538     *p = *pict;
 539     p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? FF_P_TYPE : FF_I_TYPE;
 540     p->key_frame = p->pict_type == FF_I_TYPE;
 541
 542     svq1_write_header(s, p->pict_type);
 543     for(i=0; i<3; i++){
 544         if(svq1_encode_plane(s, i,
 545             s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],
 546             s->frame_width / (i?4:1), s->frame_height / (i?4:1),
 547             s->picture.linesize[i], s->current_picture.linesize[i]) < 0)
 548                 return -1;
 549     }
 550
 551 //    align_put_bits(&s->pb);
 552     while(put_bits_count(&s->pb) & 31)
 553         put_bits(&s->pb, 1, 0);
 554
 555     flush_put_bits(&s->pb);
 556
 557     return put_bits_count(&s->pb) / 8;
 558 }
 559
 560 static av_cold int svq1_encode_end(AVCodecContext *avctx)
 561 {
 562     SVQ1Context * const s = avctx->priv_data;
 563     int i;
 564
 565     av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
 566
 567     av_freep(&s->m.me.scratchpad);
 568     av_freep(&s->m.me.map);
 569     av_freep(&s->m.me.score_map);
 570     av_freep(&s->mb_type);
 571     av_freep(&s->dummy);
 572     av_freep(&s->scratchbuf);
 573
 574     for(i=0; i<3; i++){
 575         av_freep(&s->motion_val8[i]);
 576         av_freep(&s->motion_val16[i]);
 577     }
 578
 579     return 0;
 580 }
 581
 582
 583 AVCodec svq1_encoder = {
 584     "svq1",
 585     CODEC_TYPE_VIDEO,
 586     CODEC_ID_SVQ1,
 587     sizeof(SVQ1Context),
 588     svq1_encode_init,
 589     svq1_encode_frame,
 590     svq1_encode_end,
 591     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV410P, PIX_FMT_NONE},
 592     .long_name= NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1"),
 593 };