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 Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; 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 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){
 117     int count, y, x, i, j, split, best_mean, best_score, best_count;
 118     int best_vector[6];
 119     int block_sum[7]= {0, 0, 0, 0, 0, 0};
 120     int w= 2<<((level+2)>>1);
 121     int h= 2<<((level+1)>>1);
 122     int size=w*h;
 123     int16_t block[7][256];
 124     const int8_t *codebook_sum, *codebook;
 125     const uint16_t (*mean_vlc)[2];
 126     const uint8_t (*multistage_vlc)[2];
 127
 128     best_score=0;
 129     //FIXME optimize, this doenst need to be done multiple times
 130     if(intra){
 131         codebook_sum= svq1_intra_codebook_sum[level];
 132         codebook= ff_svq1_intra_codebooks[level];
 133         mean_vlc= ff_svq1_intra_mean_vlc;
 134         multistage_vlc= ff_svq1_intra_multistage_vlc[level];
 135         for(y=0; y<h; y++){
 136             for(x=0; x<w; x++){
 137                 int v= src[x + y*stride];
 138                 block[0][x + w*y]= v;
 139                 best_score += v*v;
 140                 block_sum[0] += v;
 141             }
 142         }
 143     }else{
 144         codebook_sum= svq1_inter_codebook_sum[level];
 145         codebook= ff_svq1_inter_codebooks[level];
 146         mean_vlc= ff_svq1_inter_mean_vlc + 256;
 147         multistage_vlc= ff_svq1_inter_multistage_vlc[level];
 148         for(y=0; y<h; y++){
 149             for(x=0; x<w; x++){
 150                 int v= src[x + y*stride] - ref[x + y*stride];
 151                 block[0][x + w*y]= v;
 152                 best_score += v*v;
 153                 block_sum[0] += v;
 154             }
 155         }
 156     }
 157
 158     best_count=0;
 159     best_score -= (int)(((unsigned)block_sum[0]*block_sum[0])>>(level+3));
 160     best_mean= (block_sum[0] + (size>>1)) >> (level+3);
 161
 162     if(level<4){
 163         for(count=1; count<7; count++){
 164             int best_vector_score= INT_MAX;
 165             int best_vector_sum=-999, best_vector_mean=-999;
 166             const int stage= count-1;
 167             const int8_t *vector;
 168
 169             for(i=0; i<16; i++){
 170                 int sum= codebook_sum[stage*16 + i];
 171                 int sqr, diff, score;
 172
 173                 vector = codebook + stage*size*16 + i*size;
 174                 sqr = s->dsp.ssd_int8_vs_int16(vector, block[stage], size);
 175                 diff= block_sum[stage] - sum;
 176                 score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
 177                 if(score < best_vector_score){
 178                     int mean= (diff + (size>>1)) >> (level+3);
 179                     assert(mean >-300 && mean<300);
 180                     mean= av_clip(mean, intra?0:-256, 255);
 181                     best_vector_score= score;
 182                     best_vector[stage]= i;
 183                     best_vector_sum= sum;
 184                     best_vector_mean= mean;
 185                 }
 186             }
 187             assert(best_vector_mean != -999);
 188             vector= codebook + stage*size*16 + best_vector[stage]*size;
 189             for(j=0; j<size; j++){
 190                 block[stage+1][j] = block[stage][j] - vector[j];
 191             }
 192             block_sum[stage+1]= block_sum[stage] - best_vector_sum;
 193             best_vector_score +=
 194                 lambda*(+ 1 + 4*count
 195                         + multistage_vlc[1+count][1]
 196                         + mean_vlc[best_vector_mean][1]);
 197
 198             if(best_vector_score < best_score){
 199                 best_score= best_vector_score;
 200                 best_count= count;
 201                 best_mean= best_vector_mean;
 202             }
 203         }
 204     }
 205
 206     split=0;
 207     if(best_score > threshold && level){
 208         int score=0;
 209         int offset= (level&1) ? stride*h/2 : w/2;
 210         PutBitContext backup[6];
 211
 212         for(i=level-1; i>=0; i--){
 213             backup[i]= s->reorder_pb[i];
 214         }
 215         score += encode_block(s, src         , ref         , decoded         , stride, level-1, threshold>>1, lambda, intra);
 216         score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);
 217         score += lambda;
 218
 219         if(score < best_score){
 220             best_score= score;
 221             split=1;
 222         }else{
 223             for(i=level-1; i>=0; i--){
 224                 s->reorder_pb[i]= backup[i];
 225             }
 226         }
 227     }
 228     if (level > 0)
 229         put_bits(&s->reorder_pb[level], 1, split);
 230
 231     if(!split){
 232         assert((best_mean >= 0 && best_mean<256) || !intra);
 233         assert(best_mean >= -256 && best_mean<256);
 234         assert(best_count >=0 && best_count<7);
 235         assert(level<4 || best_count==0);
 236
 237         /* output the encoding */
 238         put_bits(&s->reorder_pb[level],
 239             multistage_vlc[1 + best_count][1],
 240             multistage_vlc[1 + best_count][0]);
 241         put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
 242             mean_vlc[best_mean][0]);
 243
 244         for (i = 0; i < best_count; i++){
 245             assert(best_vector[i]>=0 && best_vector[i]<16);
 246             put_bits(&s->reorder_pb[level], 4, best_vector[i]);
 247         }
 248
 249         for(y=0; y<h; y++){
 250             for(x=0; x<w; x++){
 251                 decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;
 252             }
 253         }
 254     }
 255
 256     return best_score;
 257 }
 258
 259
 260 static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
 261     int width, int height, int src_stride, int stride)
 262 {
 263     int x, y;
 264     int i;
 265     int block_width, block_height;
 266     int level;
 267     int threshold[6];
 268     uint8_t *src = s->scratchbuf + stride * 16;
 269     const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);
 270
 271     /* figure out the acceptable level thresholds in advance */
 272     threshold[5] = QUALITY_THRESHOLD;
 273     for (level = 4; level >= 0; level--)
 274         threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
 275
 276     block_width = (width + 15) / 16;
 277     block_height = (height + 15) / 16;
 278
 279     if(s->picture.pict_type == AV_PICTURE_TYPE_P){
 280         s->m.avctx= s->avctx;
 281         s->m.current_picture_ptr= &s->m.current_picture;
 282         s->m.last_picture_ptr   = &s->m.last_picture;
 283         s->m.last_picture.f.data[0] = ref_plane;
 284         s->m.linesize=
 285         s->m.last_picture.f.linesize[0] =
 286         s->m.new_picture.f.linesize[0] =
 287         s->m.current_picture.f.linesize[0] = stride;
 288         s->m.width= width;
 289         s->m.height= height;
 290         s->m.mb_width= block_width;
 291         s->m.mb_height= block_height;
 292         s->m.mb_stride= s->m.mb_width+1;
 293         s->m.b8_stride= 2*s->m.mb_width+1;
 294         s->m.f_code=1;
 295         s->m.pict_type= s->picture.pict_type;
 296         s->m.me_method= s->avctx->me_method;
 297         s->m.me.scene_change_score=0;
 298         s->m.flags= s->avctx->flags;
 299 //        s->m.out_format = FMT_H263;
 300 //        s->m.unrestricted_mv= 1;
 301
 302         s->m.lambda= s->picture.quality;
 303         s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
 304         s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
 305
 306         if(!s->motion_val8[plane]){
 307             s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));
 308             s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));
 309         }
 310
 311         s->m.mb_type= s->mb_type;
 312
 313         //dummies, to avoid segfaults
 314         s->m.current_picture.mb_mean=   (uint8_t *)s->dummy;
 315         s->m.current_picture.mb_var=    (uint16_t*)s->dummy;
 316         s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;
 317         s->m.current_picture.f.mb_type = s->dummy;
 318
 319         s->m.current_picture.f.motion_val[0] = s->motion_val8[plane] + 2;
 320         s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;
 321         s->m.dsp= s->dsp; //move
 322         ff_init_me(&s->m);
 323
 324         s->m.me.dia_size= s->avctx->dia_size;
 325         s->m.first_slice_line=1;
 326         for (y = 0; y < block_height; y++) {
 327             s->m.new_picture.f.data[0] = src - y*16*stride; //ugly
 328             s->m.mb_y= y;
 329
 330             for(i=0; i<16 && i + 16*y<height; i++){
 331                 memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
 332                 for(x=width; x<16*block_width; x++)
 333                     src[i*stride+x]= src[i*stride+x-1];
 334             }
 335             for(; i<16 && i + 16*y<16*block_height; i++)
 336                 memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
 337
 338             for (x = 0; x < block_width; x++) {
 339                 s->m.mb_x= x;
 340                 ff_init_block_index(&s->m);
 341                 ff_update_block_index(&s->m);
 342
 343                 ff_estimate_p_frame_motion(&s->m, x, y);
 344             }
 345             s->m.first_slice_line=0;
 346         }
 347
 348         ff_fix_long_p_mvs(&s->m);
 349         ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);
 350     }
 351
 352     s->m.first_slice_line=1;
 353     for (y = 0; y < block_height; y++) {
 354         for(i=0; i<16 && i + 16*y<height; i++){
 355             memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
 356             for(x=width; x<16*block_width; x++)
 357                 src[i*stride+x]= src[i*stride+x-1];
 358         }
 359         for(; i<16 && i + 16*y<16*block_height; i++)
 360             memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
 361
 362         s->m.mb_y= y;
 363         for (x = 0; x < block_width; x++) {
 364             uint8_t reorder_buffer[3][6][7*32];
 365             int count[3][6];
 366             int offset = y * 16 * stride + x * 16;
 367             uint8_t *decoded= decoded_plane + offset;
 368             uint8_t *ref= ref_plane + offset;
 369             int score[4]={0,0,0,0}, best;
 370             uint8_t *temp = s->scratchbuf;
 371
 372             if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size
 373                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 374                 return -1;
 375             }
 376
 377             s->m.mb_x= x;
 378             ff_init_block_index(&s->m);
 379             ff_update_block_index(&s->m);
 380
 381             if(s->picture.pict_type == AV_PICTURE_TYPE_I || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
 382                 for(i=0; i<6; i++){
 383                     init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
 384                 }
 385                 if(s->picture.pict_type == AV_PICTURE_TYPE_P){
 386                     const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
 387                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 388                     score[0]= vlc[1]*lambda;
 389                 }
 390                 score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
 391                 for(i=0; i<6; i++){
 392                     count[0][i]= put_bits_count(&s->reorder_pb[i]);
 393                     flush_put_bits(&s->reorder_pb[i]);
 394                 }
 395             }else
 396                 score[0]= INT_MAX;
 397
 398             best=0;
 399
 400             if(s->picture.pict_type == AV_PICTURE_TYPE_P){
 401                 const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
 402                 int mx, my, pred_x, pred_y, dxy;
 403                 int16_t *motion_ptr;
 404
 405                 motion_ptr= ff_h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
 406                 if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
 407                     for(i=0; i<6; i++)
 408                         init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
 409
 410                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
 411
 412                     s->m.pb= s->reorder_pb[5];
 413                     mx= motion_ptr[0];
 414                     my= motion_ptr[1];
 415                     assert(mx>=-32 && mx<=31);
 416                     assert(my>=-32 && my<=31);
 417                     assert(pred_x>=-32 && pred_x<=31);
 418                     assert(pred_y>=-32 && pred_y<=31);
 419                     ff_h263_encode_motion(&s->m, mx - pred_x, 1);
 420                     ff_h263_encode_motion(&s->m, my - pred_y, 1);
 421                     s->reorder_pb[5]= s->m.pb;
 422                     score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
 423
 424                     dxy= (mx&1) + 2*(my&1);
 425
 426                     s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
 427
 428                     score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
 429                     best= score[1] <= score[0];
 430
 431                     vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
 432                     score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);
 433                     score[2]+= vlc[1]*lambda;
 434                     if(score[2] < score[best] && mx==0 && my==0){
 435                         best=2;
 436                         s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
 437                         for(i=0; i<6; i++){
 438                             count[2][i]=0;
 439                         }
 440                         put_bits(&s->pb, vlc[1], vlc[0]);
 441                     }
 442                 }
 443
 444                 if(best==1){
 445                     for(i=0; i<6; i++){
 446                         count[1][i]= put_bits_count(&s->reorder_pb[i]);
 447                         flush_put_bits(&s->reorder_pb[i]);
 448                     }
 449                 }else{
 450                     motion_ptr[0                 ] = motion_ptr[1                 ]=
 451                     motion_ptr[2                 ] = motion_ptr[3                 ]=
 452                     motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
 453                     motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
 454                 }
 455             }
 456
 457             s->rd_total += score[best];
 458
 459             for(i=5; i>=0; i--){
 460                 avpriv_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);
 461             }
 462             if(best==0){
 463                 s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
 464             }
 465         }
 466         s->m.first_slice_line=0;
 467     }
 468     return 0;
 469 }
 470
 471 static av_cold int svq1_encode_init(AVCodecContext *avctx)
 472 {
 473     SVQ1Context * const s = avctx->priv_data;
 474
 475     ff_dsputil_init(&s->dsp, avctx);
 476     avctx->coded_frame = &s->picture;
 477
 478     s->frame_width = avctx->width;
 479     s->frame_height = avctx->height;
 480
 481     s->y_block_width = (s->frame_width + 15) / 16;
 482     s->y_block_height = (s->frame_height + 15) / 16;
 483
 484     s->c_block_width = (s->frame_width / 4 + 15) / 16;
 485     s->c_block_height = (s->frame_height / 4 + 15) / 16;
 486
 487     s->avctx= avctx;
 488     s->m.avctx= avctx;
 489     s->m.picture_structure = PICT_FRAME;
 490     s->m.me.temp      =
 491     s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
 492     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 493     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
 494     s->mb_type        = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
 495     s->dummy          = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
 496     ff_h263_encode_init(&s->m); //mv_penalty
 497
 498     return 0;
 499 }
 500
 501 static int svq1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 502                              const AVFrame *pict, int *got_packet)
 503 {
 504     SVQ1Context * const s = avctx->priv_data;
 505     AVFrame * const p = &s->picture;
 506     AVFrame temp;
 507     int i, ret;
 508
 509     if (!pkt->data &&
 510         (ret = av_new_packet(pkt, s->y_block_width*s->y_block_height*MAX_MB_BYTES*3 + FF_MIN_BUFFER_SIZE) < 0)) {
 511         av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
 512         return ret;
 513     }
 514
 515     if(avctx->pix_fmt != AV_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 * 2);
 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, pkt->data, pkt->size);
 531
 532     *p = *pict;
 533     p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
 534     p->key_frame = p->pict_type == AV_PICTURE_TYPE_I;
 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 //    avpriv_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     pkt->size = put_bits_count(&s->pb) / 8;
 552     if (p->pict_type == AV_PICTURE_TYPE_I)
 553         pkt->flags |= AV_PKT_FLAG_KEY;
 554     *got_packet = 1;
 555
 556     return 0;
 557 }
 558
 559 static av_cold int svq1_encode_end(AVCodecContext *avctx)
 560 {
 561     SVQ1Context * const s = avctx->priv_data;
 562     int i;
 563
 564     av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
 565
 566     av_freep(&s->m.me.scratchpad);
 567     av_freep(&s->m.me.map);
 568     av_freep(&s->m.me.score_map);
 569     av_freep(&s->mb_type);
 570     av_freep(&s->dummy);
 571     av_freep(&s->scratchbuf);
 572
 573     for(i=0; i<3; i++){
 574         av_freep(&s->motion_val8[i]);
 575         av_freep(&s->motion_val16[i]);
 576     }
 577
 578     return 0;
 579 }
 580
 581
 582 AVCodec ff_svq1_encoder = {
 583     .name           = "svq1",
 584     .type           = AVMEDIA_TYPE_VIDEO,
 585     .id             = AV_CODEC_ID_SVQ1,
 586     .priv_data_size = sizeof(SVQ1Context),
 587     .init           = svq1_encode_init,
 588     .encode2        = svq1_encode_frame,
 589     .close          = svq1_encode_end,
 590     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV410P, AV_PIX_FMT_NONE },
 591     .long_name      = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
 592 };