git.sesse.net Git - ffmpeg/blob - 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 #include "h263.h"
  34
  35 #include "svq1.h"
  36 #include "svq1enc_cb.h"
  37
  38 #undef NDEBUG
  39 #include <assert.h>
  40
  41
  42 typedef struct SVQ1Context {
  43     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)
  44     AVCodecContext *avctx;
  45     DSPContext dsp;
  46     AVFrame picture;
  47     AVFrame current_picture;
  48     AVFrame last_picture;
  49     PutBitContext pb;
  50     GetBitContext gb;
  51
  52     PutBitContext reorder_pb[6]; //why ooh why this sick breadth first order, everything is slower and more complex
  53
  54     int frame_width;
  55     int frame_height;
  56
  57     /* Y plane block dimensions */
  58     int y_block_width;
  59     int y_block_height;
  60
  61     /* U & V plane (C planes) block dimensions */
  62     int c_block_width;
  63     int c_block_height;
  64
  65     uint16_t *mb_type;
  66     uint32_t *dummy;
  67     int16_t (*motion_val8[3])[2];
  68     int16_t (*motion_val16[3])[2];
  69
  70     int64_t rd_total;
  71
  72     uint8_t *scratchbuf;
  73 } SVQ1Context;
  74
  75 static void svq1_write_header(SVQ1Context *s, int frame_type)
  76 {
  77     int i;
  78
  79     /* frame code */
  80     put_bits(&s->pb, 22, 0x20);
  81
  82     /* temporal reference (sure hope this is a "don't care") */
  83     put_bits(&s->pb, 8, 0x00);
  84
  85     /* frame type */
  86     put_bits(&s->pb, 2, frame_type - 1);
  87
  88     if (frame_type == FF_I_TYPE) {
  89
  90         /* no checksum since frame code is 0x20 */
  91
  92         /* no embedded string either */
  93
  94         /* output 5 unknown bits (2 + 2 + 1) */
  95         put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
  96
  97         i= ff_match_2uint16(ff_svq1_frame_size_table, FF_ARRAY_ELEMS(ff_svq1_frame_size_table), s->frame_width, s->frame_height);
  98         put_bits(&s->pb, 3, i);
  99
 100         if (i == 7)
 101         {
 102                 put_bits(&s->pb, 12, s->frame_width);
 103                 put_bits(&s->pb, 12, s->frame_height);
 104         }
 105     }
 106
 107     /* no checksum or extra data (next 2 bits get 0) */
 108     put_bits(&s->pb, 2, 0);
 109 }
 110
 111
 112 #define QUALITY_THRESHOLD 100
 113 #define THRESHOLD_MULTIPLIER 0.6
 114
 115 #if HAVE_ALTIVEC
 116 #undef vector
 117 #endif
 118
 119 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){
 120     int count, y, x, i, j, split, best_mean, best_score, best_count;
 121     int best_vector[6];
 122     int block_sum[7]= {0, 0, 0, 0, 0, 0};
 123     int w= 2<<((level+2)>>1);
 124     int h= 2<<((level+1)>>1);
 125     int size=w*h;
 126     int16_t block[7][256];
 127     const int8_t *codebook_sum, *codebook;
 128     const uint16_t (*mean_vlc)[2];
 129     const uint8_t (*multistage_vlc)[2];
 130
 131     best_score=0;
 132     //FIXME optimize, this doenst need to be done multiple times
 133     if(intra){
 134         codebook_sum= svq1_intra_codebook_sum[level];
 135         codebook= ff_svq1_intra_codebooks[level];
 136         mean_vlc= ff_svq1_intra_mean_vlc;
 137         multistage_vlc= ff_svq1_intra_multistage_vlc[level];
 138         for(y=0; y<h; y++){
 139             for(x=0; x<w; x++){
 140                 int v= src[x + y*stride];
 141                 block[0][x + w*y]= v;
 142                 best_score += v*v;
 143                 block_sum[0] += v;
 144             }
 145         }
 146     }else{
 147         codebook_sum= svq1_inter_codebook_sum[level];
 148         codebook= ff_svq1_inter_codebooks[level];
 149         mean_vlc= ff_svq1_inter_mean_vlc + 256;
 150         multistage_vlc= ff_svq1_inter_multistage_vlc[level];
 151         for(y=0; y<h; y++){
 152             for(x=0; x<w; x++){
 153                 int v= src[x + y*stride] - ref[x + y*stride];
 154                 block[0][x + w*y]= v;
 155                 best_score += v*v;
 156                 block_sum[0] += v;
 157             }
 158         }
 159     }
 160
 161     best_count=0;
 162     best_score -= ((block_sum[0]*block_sum[0])>>(level+3));
 163     best_mean= (block_sum[0] + (size>>1)) >> (level+3);
 164
 165     if(level<4){
 166         for(count=1; count<7; count++){
 167             int best_vector_score= INT_MAX;
 168             int best_vector_sum=-999, best_vector_mean=-999;
 169             const int stage= count-1;
 170             const int8_t *vector;
 171
 172             for(i=0; i<16; i++){
 173                 int sum= codebook_sum[stage*16 + i];
 174                 int sqr, diff, score;
 175
 176                 vector = codebook + stage*size*16 + i*size;
 177                 sqr = s->dsp.ssd_int8_vs_int16(vector, block[stage], size);
 178                 diff= block_sum[stage] - sum;
 179                 score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
 180                 if(score < best_vector_score){
 181                     int mean= (diff + (size>>1)) >> (level+3);
 182                     assert(mean >-300 && mean<300);
 183                     mean= av_clip(mean, intra?0:-256, 255);
 184                     best_vector_score= score;
 185                     best_vector[stage]= i;
 186                     best_vector_sum= sum;
 187                     best_vector_mean= mean;
 188                 }
 189             }
 190             assert(best_vector_mean != -999);
 191             vector= codebook + stage*size*16 + best_vector[stage]*size;
 192             for(j=0; j<size; j++){
 193                 block[stage+1][j] = block[stage][j] - vector[j];
 194             }
 195             block_sum[stage+1]= block_sum[stage] - best_vector_sum;
 196             best_vector_score +=
 197                 lambda*(+ 1 + 4*count
 198                         + multistage_vlc[1+count][1]
 199                         + mean_vlc[best_vector_mean][1]);
 200
 201             if(best_vector_score < best_score){
 202                 best_score= best_vector_score;
 203                 best_count= count;
 204                 best_mean= best_vector_mean;
 205             }
 206         }
 207     }
 208
 209     split=0;
 210     if(best_score > threshold && level){
 211         int score=0;
 212         int offset= (level&1) ? stride*h/2 : w/2;
 213         PutBitContext backup[6];
 214
 215         for(i=level-1; i>=0; i--){
 216             backup[i]= s->reorder_pb[i];
 217         }
 218         score += encode_block(s, src         , ref         , decoded         , stride, level-1, threshold>>1, lambda, intra);
 219         score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);
 220         score += lambda;
 221
 222         if(score < best_score){
 223             best_score= score;
 224             split=1;
 225         }else{
 226             for(i=level-1; i>=0; i--){
 227                 s->reorder_pb[i]= backup[i];
 228             }
 229         }
 230     }
 231     if (level > 0)
 232         put_bits(&s->reorder_pb[level], 1, split);
 233
 234     if(!split){
 235         assert((best_mean >= 0 && best_mean<256) || !intra);
 236         assert(best_mean >= -256 && best_mean<256);
 237         assert(best_count >=0 && best_count<7);
 238         assert(level<4 || best_count==0);
 239
 240         /* output the encoding */
 241         put_bits(&s->reorder_pb[level],
 242             multistage_vlc[1 + best_count][1],
 243             multistage_vlc[1 + best_count][0]);
 244         put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
 245             mean_vlc[best_mean][0]);
 246
 247         for (i = 0; i < best_count; i++){
 248             assert(best_vector[i]>=0 && best_vector[i]<16);
 249             put_bits(&s->reorder_pb[level], 4, best_vector[i]);
 250         }
 251
 252         for(y=0; y<h; y++){
 253             for(x=0; x<w; x++){
 254                 decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;
 255             }
 256         }
 257     }
 258
 259     return best_score;
 260 }
 261
 262
 263 static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
 264     int width, int height, int src_stride, int stride)
 265 {
 266     int x, y;
 267     int i;
 268     int block_width, block_height;
 269     int level;
 270     int threshold[6];
 271     const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);
 272
 273     /* figure out the acceptable level thresholds in advance */
 274     threshold[5] = QUALITY_THRESHOLD;
 275     for (level = 4; level >= 0; level--)
 276         threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
 277
 278     block_width = (width + 15) / 16;
 279     block_height = (height + 15) / 16;
 280
 281     if(s->picture.pict_type == FF_P_TYPE){
 282         s->m.avctx= s->avctx;
 283         s->m.current_picture_ptr= &s->m.current_picture;
 284         s->m.last_picture_ptr   = &s->m.last_picture;
 285         s->m.last_picture.data[0]= ref_plane;
 286         s->m.linesize=
 287         s->m.last_picture.linesize[0]=
 288         s->m.new_picture.linesize[0]=
 289         s->m.current_picture.linesize[0]= stride;
 290         s->m.width= width;
 291         s->m.height= height;
 292         s->m.mb_width= block_width;
 293         s->m.mb_height= block_height;
 294         s->m.mb_stride= s->m.mb_width+1;
 295         s->m.b8_stride= 2*s->m.mb_width+1;
 296         s->m.f_code=1;
 297         s->m.pict_type= s->picture.pict_type;
 298         s->m.me_method= s->avctx->me_method;
 299         s->m.me.scene_change_score=0;
 300         s->m.flags= s->avctx->flags;
 301 //        s->m.out_format = FMT_H263;
 302 //        s->m.unrestricted_mv= 1;
 303
 304         s->m.lambda= s->picture.quality;
 305         s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
 306         s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
 307
 308         if(!s->motion_val8[plane]){
 309             s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));
 310             s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));
 311         }
 312
 313         s->m.mb_type= s->mb_type;
 314
 315         //dummies, to avoid segfaults
 316         s->m.current_picture.mb_mean=   (uint8_t *)s->dummy;
 317         s->m.current_picture.mb_var=    (uint16_t*)s->dummy;
 318         s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;
 319         s->m.current_picture.mb_type= s->dummy;
 320
 321         s->m.current_picture.motion_val[0]= s->motion_val8[plane] + 2;
 322         s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;
 323         s->m.dsp= s->dsp; //move
 324         ff_init_me(&s->m);
 325
 326         s->m.me.dia_size= s->avctx->dia_size;
 327         s->m.first_slice_line=1;
 328         for (y = 0; y < block_height; y++) {
 329             uint8_t src[stride*16];
 330
 331             s->m.new_picture.data[0]= src - y*16*stride; //ugly
 332             s->m.mb_y= y;
 333
 334             for(i=0; i<16 && i + 16*y<height; i++){
 335                 memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
 336                 for(x=width; x<16*block_width; x++)
 337                     src[i*stride+x]= src[i*stride+x-1];
 338             }
 339             for(; i<16 && i + 16*y<16*block_height; i++)
 340                 memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
 341
 342             for (x = 0; x < block_width; x++) {
 343                 s->m.mb_x= x;
 344                 ff_init_block_index(&s->m);
 345                 ff_update_block_index(&s->m);
 346
 347                 ff_estimate_p_frame_motion(&s->m, x, y);
 348             }
 349             s->m.first_slice_line=0;
 350         }
 351
 352         ff_fix_long_p_mvs(&s->m);
 353         ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);
 354     }
 355
 356     s->m.first_slice_line=1;
 357     for (y = 0; y < block_height; y++) {
 358         uint8_t src[stride*16];
 359
 360         for(i=0; i<16 && i + 16*y<height; i++){
 361             memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
 362             for(x=width; x<16*block_width; x++)
 363                 src[i*stride+x]= src[i*stride+x-1];
 364         }
 365         for(; i<16 && i + 16*y<16*block_height; i++)
 366             memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
 367
 368         s->m.mb_y= y;
 369         for (x = 0; x < block_width; x++) {
 370             uint8_t reorder_buffer[3][6][7*32];
 371             int count[3][6];
 372             int offset = y * 16 * stride + x * 16;
 373             uint8_t *decoded= decoded_plane + offset;
 374             uint8_t *ref= ref_plane + offset;
 375             int score[4]={0,0,0,0}, best;
 376             uint8_t *temp = s->scratchbuf;
 377
 378             if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size
 379                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 380                 return -1;
 381             }
 382
 383             s->m.mb_x= x;
 384             ff_init_block_index(&s->m);
 385             ff_update_block_index(&s->m);
 386
 387             if(s->picture.pict_type == FF_I_TYPE || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
 388                 for(i=0; i<6; i++){
 389                     init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
 390                 }
 391                 if(s->picture.pict_type == FF_P_TYPE){
 392                     const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
 393                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 394                     score[0]= vlc[1]*lambda;
 395                 }
 396                 score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
 397                 for(i=0; i<6; i++){
 398                     count[0][i]= put_bits_count(&s->reorder_pb[i]);
 399                     flush_put_bits(&s->reorder_pb[i]);
 400                 }
 401             }else
 402                 score[0]= INT_MAX;
 403
 404             best=0;
 405
 406             if(s->picture.pict_type == FF_P_TYPE){
 407                 const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
 408                 int mx, my, pred_x, pred_y, dxy;
 409                 int16_t *motion_ptr;
 410
 411                 motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
 412                 if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
 413                     for(i=0; i<6; i++)
 414                         init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
 415
 416                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 417
 418                     s->m.pb= s->reorder_pb[5];
 419                     mx= motion_ptr[0];
 420                     my= motion_ptr[1];
 421                     assert(mx>=-32 && mx<=31);
 422                     assert(my>=-32 && my<=31);
 423                     assert(pred_x>=-32 && pred_x<=31);
 424                     assert(pred_y>=-32 && pred_y<=31);
 425                     ff_h263_encode_motion(&s->m, mx - pred_x, 1);
 426                     ff_h263_encode_motion(&s->m, my - pred_y, 1);
 427                     s->reorder_pb[5]= s->m.pb;
 428                     score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
 429
 430                     dxy= (mx&1) + 2*(my&1);
 431
 432                     s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
 433
 434                     score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
 435                     best= score[1] <= score[0];
 436
 437                     vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
 438                     score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);
 439                     score[2]+= vlc[1]*lambda;
 440                     if(score[2] < score[best] && mx==0 && my==0){
 441                         best=2;
 442                         s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
 443                         for(i=0; i<6; i++){
 444                             count[2][i]=0;
 445                         }
 446                         put_bits(&s->pb, vlc[1], vlc[0]);
 447                     }
 448                 }
 449
 450                 if(best==1){
 451                     for(i=0; i<6; i++){
 452                         count[1][i]= put_bits_count(&s->reorder_pb[i]);
 453                         flush_put_bits(&s->reorder_pb[i]);
 454                     }
 455                 }else{
 456                     motion_ptr[0                 ] = motion_ptr[1                 ]=
 457                     motion_ptr[2                 ] = motion_ptr[3                 ]=
 458                     motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
 459                     motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
 460                 }
 461             }
 462
 463             s->rd_total += score[best];
 464
 465             for(i=5; i>=0; i--){
 466                 ff_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);
 467             }
 468             if(best==0){
 469                 s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
 470             }
 471         }
 472         s->m.first_slice_line=0;
 473     }
 474     return 0;
 475 }
 476
 477 static av_cold int svq1_encode_init(AVCodecContext *avctx)
 478 {
 479     SVQ1Context * const s = avctx->priv_data;
 480
 481     dsputil_init(&s->dsp, avctx);
 482     avctx->coded_frame= (AVFrame*)&s->picture;
 483
 484     s->frame_width = avctx->width;
 485     s->frame_height = avctx->height;
 486
 487     s->y_block_width = (s->frame_width + 15) / 16;
 488     s->y_block_height = (s->frame_height + 15) / 16;
 489
 490     s->c_block_width = (s->frame_width / 4 + 15) / 16;
 491     s->c_block_height = (s->frame_height / 4 + 15) / 16;
 492
 493     s->avctx= avctx;
 494     s->m.avctx= avctx;
 495     s->m.me.temp      =
 496     s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
 497     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 498     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 499     s->mb_type        = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
 500     s->dummy          = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
 501     h263_encode_init(&s->m); //mv_penalty
 502
 503     return 0;
 504 }
 505
 506 static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
 507     int buf_size, void *data)
 508 {
 509     SVQ1Context * const s = avctx->priv_data;
 510     AVFrame *pict = data;
 511     AVFrame * const p= (AVFrame*)&s->picture;
 512     AVFrame temp;
 513     int i;
 514
 515     if(avctx->pix_fmt != PIX_FMT_YUV410P){
 516         av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
 517         return -1;
 518     }
 519
 520     if(!s->current_picture.data[0]){
 521         avctx->get_buffer(avctx, &s->current_picture);
 522         avctx->get_buffer(avctx, &s->last_picture);
 523         s->scratchbuf = av_malloc(s->current_picture.linesize[0] * 16);
 524     }
 525
 526     temp= s->current_picture;
 527     s->current_picture= s->last_picture;
 528     s->last_picture= temp;
 529
 530     init_put_bits(&s->pb, buf, buf_size);
 531
 532     *p = *pict;
 533     p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? FF_P_TYPE : FF_I_TYPE;
 534     p->key_frame = p->pict_type == FF_I_TYPE;
 535
 536     svq1_write_header(s, p->pict_type);
 537     for(i=0; i<3; i++){
 538         if(svq1_encode_plane(s, i,
 539             s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],
 540             s->frame_width / (i?4:1), s->frame_height / (i?4:1),
 541             s->picture.linesize[i], s->current_picture.linesize[i]) < 0)
 542                 return -1;
 543     }
 544
 545 //    align_put_bits(&s->pb);
 546     while(put_bits_count(&s->pb) & 31)
 547         put_bits(&s->pb, 1, 0);
 548
 549     flush_put_bits(&s->pb);
 550
 551     return put_bits_count(&s->pb) / 8;
 552 }
 553
 554 static av_cold int svq1_encode_end(AVCodecContext *avctx)
 555 {
 556     SVQ1Context * const s = avctx->priv_data;
 557     int i;
 558
 559     av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
 560
 561     av_freep(&s->m.me.scratchpad);
 562     av_freep(&s->m.me.map);
 563     av_freep(&s->m.me.score_map);
 564     av_freep(&s->mb_type);
 565     av_freep(&s->dummy);
 566     av_freep(&s->scratchbuf);
 567
 568     for(i=0; i<3; i++){
 569         av_freep(&s->motion_val8[i]);
 570         av_freep(&s->motion_val16[i]);
 571     }
 572
 573     return 0;
 574 }
 575
 576
 577 AVCodec svq1_encoder = {
 578     "svq1",
 579     CODEC_TYPE_VIDEO,
 580     CODEC_ID_SVQ1,
 581     sizeof(SVQ1Context),
 582     svq1_encode_init,
 583     svq1_encode_frame,
 584     svq1_encode_end,
 585     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV410P, PIX_FMT_NONE},
 586     .long_name= NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
 587 };