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
  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 #include "internal.h"
  35
  36 #include "svq1.h"
  37 #include "svq1enc_cb.h"
  38
  39 #undef NDEBUG
  40 #include <assert.h>
  41
  42
  43 typedef struct SVQ1Context {
  44     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)
  45     AVCodecContext *avctx;
  46     DSPContext dsp;
  47     AVFrame picture;
  48     AVFrame current_picture;
  49     AVFrame last_picture;
  50     PutBitContext pb;
  51     GetBitContext gb;
  52
  53     PutBitContext reorder_pb[6]; //why ooh why this sick breadth first order, everything is slower and more complex
  54
  55     int frame_width;
  56     int frame_height;
  57
  58     /* Y plane block dimensions */
  59     int y_block_width;
  60     int y_block_height;
  61
  62     /* U & V plane (C planes) block dimensions */
  63     int c_block_width;
  64     int c_block_height;
  65
  66     uint16_t *mb_type;
  67     uint32_t *dummy;
  68     int16_t (*motion_val8[3])[2];
  69     int16_t (*motion_val16[3])[2];
  70
  71     int64_t rd_total;
  72
  73     uint8_t *scratchbuf;
  74 } SVQ1Context;
  75
  76 static void svq1_write_header(SVQ1Context *s, int frame_type)
  77 {
  78     int i;
  79
  80     /* frame code */
  81     put_bits(&s->pb, 22, 0x20);
  82
  83     /* temporal reference (sure hope this is a "don't care") */
  84     put_bits(&s->pb, 8, 0x00);
  85
  86     /* frame type */
  87     put_bits(&s->pb, 2, frame_type - 1);
  88
  89     if (frame_type == AV_PICTURE_TYPE_I) {
  90
  91         /* no checksum since frame code is 0x20 */
  92
  93         /* no embedded string either */
  94
  95         /* output 5 unknown bits (2 + 2 + 1) */
  96         put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
  97
  98         i= ff_match_2uint16(ff_svq1_frame_size_table, FF_ARRAY_ELEMS(ff_svq1_frame_size_table), s->frame_width, s->frame_height);
  99         put_bits(&s->pb, 3, i);
 100
 101         if (i == 7)
 102         {
 103                 put_bits(&s->pb, 12, s->frame_width);
 104                 put_bits(&s->pb, 12, s->frame_height);
 105         }
 106     }
 107
 108     /* no checksum or extra data (next 2 bits get 0) */
 109     put_bits(&s->pb, 2, 0);
 110 }
 111
 112
 113 #define QUALITY_THRESHOLD 100
 114 #define THRESHOLD_MULTIPLIER 0.6
 115
 116 #if HAVE_ALTIVEC
 117 #undef vector
 118 #endif
 119
 120 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){
 121     int count, y, x, i, j, split, best_mean, best_score, best_count;
 122     int best_vector[6];
 123     int block_sum[7]= {0, 0, 0, 0, 0, 0};
 124     int w= 2<<((level+2)>>1);
 125     int h= 2<<((level+1)>>1);
 126     int size=w*h;
 127     int16_t block[7][256];
 128     const int8_t *codebook_sum, *codebook;
 129     const uint16_t (*mean_vlc)[2];
 130     const uint8_t (*multistage_vlc)[2];
 131
 132     best_score=0;
 133     //FIXME optimize, this doenst need to be done multiple times
 134     if(intra){
 135         codebook_sum= svq1_intra_codebook_sum[level];
 136         codebook= ff_svq1_intra_codebooks[level];
 137         mean_vlc= ff_svq1_intra_mean_vlc;
 138         multistage_vlc= ff_svq1_intra_multistage_vlc[level];
 139         for(y=0; y<h; y++){
 140             for(x=0; x<w; x++){
 141                 int v= src[x + y*stride];
 142                 block[0][x + w*y]= v;
 143                 best_score += v*v;
 144                 block_sum[0] += v;
 145             }
 146         }
 147     }else{
 148         codebook_sum= svq1_inter_codebook_sum[level];
 149         codebook= ff_svq1_inter_codebooks[level];
 150         mean_vlc= ff_svq1_inter_mean_vlc + 256;
 151         multistage_vlc= ff_svq1_inter_multistage_vlc[level];
 152         for(y=0; y<h; y++){
 153             for(x=0; x<w; x++){
 154                 int v= src[x + y*stride] - ref[x + y*stride];
 155                 block[0][x + w*y]= v;
 156                 best_score += v*v;
 157                 block_sum[0] += v;
 158             }
 159         }
 160     }
 161
 162     best_count=0;
 163     best_score -= ((block_sum[0]*block_sum[0])>>(level+3));
 164     best_mean= (block_sum[0] + (size>>1)) >> (level+3);
 165
 166     if(level<4){
 167         for(count=1; count<7; count++){
 168             int best_vector_score= INT_MAX;
 169             int best_vector_sum=-999, best_vector_mean=-999;
 170             const int stage= count-1;
 171             const int8_t *vector;
 172
 173             for(i=0; i<16; i++){
 174                 int sum= codebook_sum[stage*16 + i];
 175                 int sqr, diff, score;
 176
 177                 vector = codebook + stage*size*16 + i*size;
 178                 sqr = s->dsp.ssd_int8_vs_int16(vector, block[stage], size);
 179                 diff= block_sum[stage] - sum;
 180                 score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
 181                 if(score < best_vector_score){
 182                     int mean= (diff + (size>>1)) >> (level+3);
 183                     assert(mean >-300 && mean<300);
 184                     mean= av_clip(mean, intra?0:-256, 255);
 185                     best_vector_score= score;
 186                     best_vector[stage]= i;
 187                     best_vector_sum= sum;
 188                     best_vector_mean= mean;
 189                 }
 190             }
 191             assert(best_vector_mean != -999);
 192             vector= codebook + stage*size*16 + best_vector[stage]*size;
 193             for(j=0; j<size; j++){
 194                 block[stage+1][j] = block[stage][j] - vector[j];
 195             }
 196             block_sum[stage+1]= block_sum[stage] - best_vector_sum;
 197             best_vector_score +=
 198                 lambda*(+ 1 + 4*count
 199                         + multistage_vlc[1+count][1]
 200                         + mean_vlc[best_vector_mean][1]);
 201
 202             if(best_vector_score < best_score){
 203                 best_score= best_vector_score;
 204                 best_count= count;
 205                 best_mean= best_vector_mean;
 206             }
 207         }
 208     }
 209
 210     split=0;
 211     if(best_score > threshold && level){
 212         int score=0;
 213         int offset= (level&1) ? stride*h/2 : w/2;
 214         PutBitContext backup[6];
 215
 216         for(i=level-1; i>=0; i--){
 217             backup[i]= s->reorder_pb[i];
 218         }
 219         score += encode_block(s, src         , ref         , decoded         , stride, level-1, threshold>>1, lambda, intra);
 220         score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);
 221         score += lambda;
 222
 223         if(score < best_score){
 224             best_score= score;
 225             split=1;
 226         }else{
 227             for(i=level-1; i>=0; i--){
 228                 s->reorder_pb[i]= backup[i];
 229             }
 230         }
 231     }
 232     if (level > 0)
 233         put_bits(&s->reorder_pb[level], 1, split);
 234
 235     if(!split){
 236         assert((best_mean >= 0 && best_mean<256) || !intra);
 237         assert(best_mean >= -256 && best_mean<256);
 238         assert(best_count >=0 && best_count<7);
 239         assert(level<4 || best_count==0);
 240
 241         /* output the encoding */
 242         put_bits(&s->reorder_pb[level],
 243             multistage_vlc[1 + best_count][1],
 244             multistage_vlc[1 + best_count][0]);
 245         put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
 246             mean_vlc[best_mean][0]);
 247
 248         for (i = 0; i < best_count; i++){
 249             assert(best_vector[i]>=0 && best_vector[i]<16);
 250             put_bits(&s->reorder_pb[level], 4, best_vector[i]);
 251         }
 252
 253         for(y=0; y<h; y++){
 254             for(x=0; x<w; x++){
 255                 decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;
 256             }
 257         }
 258     }
 259
 260     return best_score;
 261 }
 262
 263
 264 static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
 265     int width, int height, int src_stride, int stride)
 266 {
 267     int x, y;
 268     int i;
 269     int block_width, block_height;
 270     int level;
 271     int threshold[6];
 272     uint8_t *src = s->scratchbuf + stride * 16;
 273     const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);
 274
 275     /* figure out the acceptable level thresholds in advance */
 276     threshold[5] = QUALITY_THRESHOLD;
 277     for (level = 4; level >= 0; level--)
 278         threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
 279
 280     block_width = (width + 15) / 16;
 281     block_height = (height + 15) / 16;
 282
 283     if(s->picture.pict_type == AV_PICTURE_TYPE_P){
 284         s->m.avctx= s->avctx;
 285         s->m.current_picture_ptr= &s->m.current_picture;
 286         s->m.last_picture_ptr   = &s->m.last_picture;
 287         s->m.last_picture.data[0]= ref_plane;
 288         s->m.linesize=
 289         s->m.last_picture.linesize[0]=
 290         s->m.new_picture.linesize[0]=
 291         s->m.current_picture.linesize[0]= stride;
 292         s->m.width= width;
 293         s->m.height= height;
 294         s->m.mb_width= block_width;
 295         s->m.mb_height= block_height;
 296         s->m.mb_stride= s->m.mb_width+1;
 297         s->m.b8_stride= 2*s->m.mb_width+1;
 298         s->m.f_code=1;
 299         s->m.pict_type= s->picture.pict_type;
 300         s->m.me_method= s->avctx->me_method;
 301         s->m.me.scene_change_score=0;
 302         s->m.flags= s->avctx->flags;
 303 //        s->m.out_format = FMT_H263;
 304 //        s->m.unrestricted_mv= 1;
 305
 306         s->m.lambda= s->picture.quality;
 307         s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
 308         s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
 309
 310         if(!s->motion_val8[plane]){
 311             s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));
 312             s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));
 313         }
 314
 315         s->m.mb_type= s->mb_type;
 316
 317         //dummies, to avoid segfaults
 318         s->m.current_picture.mb_mean=   (uint8_t *)s->dummy;
 319         s->m.current_picture.mb_var=    (uint16_t*)s->dummy;
 320         s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;
 321         s->m.current_picture.mb_type= s->dummy;
 322
 323         s->m.current_picture.motion_val[0]= s->motion_val8[plane] + 2;
 324         s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;
 325         s->m.dsp= s->dsp; //move
 326         ff_init_me(&s->m);
 327
 328         s->m.me.dia_size= s->avctx->dia_size;
 329         s->m.first_slice_line=1;
 330         for (y = 0; y < block_height; y++) {
 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         for(i=0; i<16 && i + 16*y<height; i++){
 359             memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
 360             for(x=width; x<16*block_width; x++)
 361                 src[i*stride+x]= src[i*stride+x-1];
 362         }
 363         for(; i<16 && i + 16*y<16*block_height; i++)
 364             memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
 365
 366         s->m.mb_y= y;
 367         for (x = 0; x < block_width; x++) {
 368             uint8_t reorder_buffer[3][6][7*32];
 369             int count[3][6];
 370             int offset = y * 16 * stride + x * 16;
 371             uint8_t *decoded= decoded_plane + offset;
 372             uint8_t *ref= ref_plane + offset;
 373             int score[4]={0,0,0,0}, best;
 374             uint8_t *temp = s->scratchbuf;
 375
 376             if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size
 377                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 378                 return -1;
 379             }
 380
 381             s->m.mb_x= x;
 382             ff_init_block_index(&s->m);
 383             ff_update_block_index(&s->m);
 384
 385             if(s->picture.pict_type == AV_PICTURE_TYPE_I || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
 386                 for(i=0; i<6; i++){
 387                     init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
 388                 }
 389                 if(s->picture.pict_type == AV_PICTURE_TYPE_P){
 390                     const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
 391                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 392                     score[0]= vlc[1]*lambda;
 393                 }
 394                 score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
 395                 for(i=0; i<6; i++){
 396                     count[0][i]= put_bits_count(&s->reorder_pb[i]);
 397                     flush_put_bits(&s->reorder_pb[i]);
 398                 }
 399             }else
 400                 score[0]= INT_MAX;
 401
 402             best=0;
 403
 404             if(s->picture.pict_type == AV_PICTURE_TYPE_P){
 405                 const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
 406                 int mx, my, pred_x, pred_y, dxy;
 407                 int16_t *motion_ptr;
 408
 409                 motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
 410                 if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
 411                     for(i=0; i<6; i++)
 412                         init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
 413
 414                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 415
 416                     s->m.pb= s->reorder_pb[5];
 417                     mx= motion_ptr[0];
 418                     my= motion_ptr[1];
 419                     assert(mx>=-32 && mx<=31);
 420                     assert(my>=-32 && my<=31);
 421                     assert(pred_x>=-32 && pred_x<=31);
 422                     assert(pred_y>=-32 && pred_y<=31);
 423                     ff_h263_encode_motion(&s->m, mx - pred_x, 1);
 424                     ff_h263_encode_motion(&s->m, my - pred_y, 1);
 425                     s->reorder_pb[5]= s->m.pb;
 426                     score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
 427
 428                     dxy= (mx&1) + 2*(my&1);
 429
 430                     s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
 431
 432                     score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
 433                     best= score[1] <= score[0];
 434
 435                     vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
 436                     score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);
 437                     score[2]+= vlc[1]*lambda;
 438                     if(score[2] < score[best] && mx==0 && my==0){
 439                         best=2;
 440                         s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
 441                         for(i=0; i<6; i++){
 442                             count[2][i]=0;
 443                         }
 444                         put_bits(&s->pb, vlc[1], vlc[0]);
 445                     }
 446                 }
 447
 448                 if(best==1){
 449                     for(i=0; i<6; i++){
 450                         count[1][i]= put_bits_count(&s->reorder_pb[i]);
 451                         flush_put_bits(&s->reorder_pb[i]);
 452                     }
 453                 }else{
 454                     motion_ptr[0                 ] = motion_ptr[1                 ]=
 455                     motion_ptr[2                 ] = motion_ptr[3                 ]=
 456                     motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
 457                     motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
 458                 }
 459             }
 460
 461             s->rd_total += score[best];
 462
 463             for(i=5; i>=0; i--){
 464                 ff_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);
 465             }
 466             if(best==0){
 467                 s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
 468             }
 469         }
 470         s->m.first_slice_line=0;
 471     }
 472     return 0;
 473 }
 474
 475 static av_cold int svq1_encode_init(AVCodecContext *avctx)
 476 {
 477     SVQ1Context * const s = avctx->priv_data;
 478
 479     dsputil_init(&s->dsp, avctx);
 480     avctx->coded_frame= (AVFrame*)&s->picture;
 481
 482     s->frame_width = avctx->width;
 483     s->frame_height = avctx->height;
 484
 485     s->y_block_width = (s->frame_width + 15) / 16;
 486     s->y_block_height = (s->frame_height + 15) / 16;
 487
 488     s->c_block_width = (s->frame_width / 4 + 15) / 16;
 489     s->c_block_height = (s->frame_height / 4 + 15) / 16;
 490
 491     s->avctx= avctx;
 492     s->m.avctx= avctx;
 493     s->m.me.temp      =
 494     s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
 495     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 496     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 497     s->mb_type        = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
 498     s->dummy          = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
 499     h263_encode_init(&s->m); //mv_penalty
 500
 501     return 0;
 502 }
 503
 504 static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
 505     int buf_size, void *data)
 506 {
 507     SVQ1Context * const s = avctx->priv_data;
 508     AVFrame *pict = data;
 509     AVFrame * const p= (AVFrame*)&s->picture;
 510     AVFrame temp;
 511     int i;
 512
 513     if(avctx->pix_fmt != PIX_FMT_YUV410P){
 514         av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
 515         return -1;
 516     }
 517
 518     if(!s->current_picture.data[0]){
 519         avctx->get_buffer(avctx, &s->current_picture);
 520         avctx->get_buffer(avctx, &s->last_picture);
 521         s->scratchbuf = av_malloc(s->current_picture.linesize[0] * 16 * 2);
 522     }
 523
 524     temp= s->current_picture;
 525     s->current_picture= s->last_picture;
 526     s->last_picture= temp;
 527
 528     init_put_bits(&s->pb, buf, buf_size);
 529
 530     *p = *pict;
 531     p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
 532     p->key_frame = p->pict_type == AV_PICTURE_TYPE_I;
 533
 534     svq1_write_header(s, p->pict_type);
 535     for(i=0; i<3; i++){
 536         if(svq1_encode_plane(s, i,
 537             s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],
 538             s->frame_width / (i?4:1), s->frame_height / (i?4:1),
 539             s->picture.linesize[i], s->current_picture.linesize[i]) < 0)
 540                 return -1;
 541     }
 542
 543 //    align_put_bits(&s->pb);
 544     while(put_bits_count(&s->pb) & 31)
 545         put_bits(&s->pb, 1, 0);
 546
 547     flush_put_bits(&s->pb);
 548
 549     return put_bits_count(&s->pb) / 8;
 550 }
 551
 552 static av_cold int svq1_encode_end(AVCodecContext *avctx)
 553 {
 554     SVQ1Context * const s = avctx->priv_data;
 555     int i;
 556
 557     av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
 558
 559     av_freep(&s->m.me.scratchpad);
 560     av_freep(&s->m.me.map);
 561     av_freep(&s->m.me.score_map);
 562     av_freep(&s->mb_type);
 563     av_freep(&s->dummy);
 564     av_freep(&s->scratchbuf);
 565
 566     for(i=0; i<3; i++){
 567         av_freep(&s->motion_val8[i]);
 568         av_freep(&s->motion_val16[i]);
 569     }
 570
 571     return 0;
 572 }
 573
 574
 575 AVCodec ff_svq1_encoder = {
 576     "svq1",
 577     AVMEDIA_TYPE_VIDEO,
 578     CODEC_ID_SVQ1,
 579     sizeof(SVQ1Context),
 580     svq1_encode_init,
 581     svq1_encode_frame,
 582     svq1_encode_end,
 583     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV410P, PIX_FMT_NONE},
 584     .long_name= NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
 585 };