libavcodec/huffyuvenc.c

   1 /*
   2  * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
   5  * the algorithm used
   6  *
   7  * This file is part of Libav.
   8  *
   9  * Libav is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * Libav is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with Libav; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 /**
  25  * @file
  26  * huffyuv encoder
  27  */
  28
  29 #include "avcodec.h"
  30 #include "huffyuv.h"
  31 #include "huffman.h"
  32 #include "put_bits.h"
  33
  34 static inline int sub_left_prediction(HYuvContext *s, uint8_t *dst,
  35                                       uint8_t *src, int w, int left)
  36 {
  37     int i;
  38     if (w < 32) {
  39         for (i = 0; i < w; i++) {
  40             const int temp = src[i];
  41             dst[i] = temp - left;
  42             left   = temp;
  43         }
  44         return left;
  45     } else {
  46         for (i = 0; i < 16; i++) {
  47             const int temp = src[i];
  48             dst[i] = temp - left;
  49             left   = temp;
  50         }
  51         s->dsp.diff_bytes(dst + 16, src + 16, src + 15, w - 16);
  52         return src[w-1];
  53     }
  54 }
  55
  56 static inline void sub_left_prediction_bgr32(HYuvContext *s, uint8_t *dst,
  57                                              uint8_t *src, int w,
  58                                              int *red, int *green, int *blue)
  59 {
  60     int i;
  61     int r,g,b;
  62     r = *red;
  63     g = *green;
  64     b = *blue;
  65
  66     for (i = 0; i < FFMIN(w, 4); i++) {
  67         const int rt = src[i * 4 + R];
  68         const int gt = src[i * 4 + G];
  69         const int bt = src[i * 4 + B];
  70         dst[i * 4 + R] = rt - r;
  71         dst[i * 4 + G] = gt - g;
  72         dst[i * 4 + B] = bt - b;
  73         r = rt;
  74         g = gt;
  75         b = bt;
  76     }
  77
  78     s->dsp.diff_bytes(dst + 16, src + 16, src + 12, w * 4 - 16);
  79
  80     *red   = src[(w - 1) * 4 + R];
  81     *green = src[(w - 1) * 4 + G];
  82     *blue  = src[(w - 1) * 4 + B];
  83 }
  84
  85 static int store_table(HYuvContext *s, const uint8_t *len, uint8_t *buf)
  86 {
  87     int i;
  88     int index = 0;
  89
  90     for (i = 0; i < 256;) {
  91         int val = len[i];
  92         int repeat = 0;
  93
  94         for (; i < 256 && len[i] == val && repeat < 255; i++)
  95             repeat++;
  96
  97         assert(val < 32 && val >0 && repeat<256 && repeat>0);
  98         if ( repeat > 7) {
  99             buf[index++] = val;
 100             buf[index++] = repeat;
 101         } else {
 102             buf[index++] = val | (repeat << 5);
 103         }
 104     }
 105
 106     return index;
 107 }
 108
 109 static av_cold int encode_init(AVCodecContext *avctx)
 110 {
 111     HYuvContext *s = avctx->priv_data;
 112     int i, j;
 113
 114     ff_huffyuv_common_init(avctx);
 115
 116     avctx->extradata = av_mallocz(1024*30); // 256*3+4 == 772
 117     avctx->stats_out = av_mallocz(1024*30); // 21*256*3(%llu ) + 3(\n) + 1(0) = 16132
 118     s->version = 2;
 119
 120     avctx->coded_frame = &s->picture;
 121
 122     switch (avctx->pix_fmt) {
 123     case AV_PIX_FMT_YUV420P:
 124         s->bitstream_bpp = 12;
 125         break;
 126     case AV_PIX_FMT_YUV422P:
 127         s->bitstream_bpp = 16;
 128         break;
 129     case AV_PIX_FMT_RGB32:
 130         s->bitstream_bpp = 24;
 131         break;
 132     default:
 133         av_log(avctx, AV_LOG_ERROR, "format not supported\n");
 134         return -1;
 135     }
 136     avctx->bits_per_coded_sample = s->bitstream_bpp;
 137     s->decorrelate = s->bitstream_bpp >= 24;
 138     s->predictor = avctx->prediction_method;
 139     s->interlaced = avctx->flags&CODEC_FLAG_INTERLACED_ME ? 1 : 0;
 140     if (avctx->context_model == 1) {
 141         s->context = avctx->context_model;
 142         if (s->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)) {
 143             av_log(avctx, AV_LOG_ERROR,
 144                    "context=1 is not compatible with "
 145                    "2 pass huffyuv encoding\n");
 146             return -1;
 147         }
 148     }else s->context= 0;
 149
 150     if (avctx->codec->id == AV_CODEC_ID_HUFFYUV) {
 151         if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
 152             av_log(avctx, AV_LOG_ERROR,
 153                    "Error: YV12 is not supported by huffyuv; use "
 154                    "vcodec=ffvhuff or format=422p\n");
 155             return -1;
 156         }
 157         if (avctx->context_model) {
 158             av_log(avctx, AV_LOG_ERROR,
 159                    "Error: per-frame huffman tables are not supported "
 160                    "by huffyuv; use vcodec=ffvhuff\n");
 161             return -1;
 162         }
 163         if (s->interlaced != ( s->height > 288 ))
 164             av_log(avctx, AV_LOG_INFO,
 165                    "using huffyuv 2.2.0 or newer interlacing flag\n");
 166     }
 167
 168     if (s->bitstream_bpp >= 24 && s->predictor == MEDIAN) {
 169         av_log(avctx, AV_LOG_ERROR,
 170                "Error: RGB is incompatible with median predictor\n");
 171         return -1;
 172     }
 173
 174     ((uint8_t*)avctx->extradata)[0] = s->predictor | (s->decorrelate << 6);
 175     ((uint8_t*)avctx->extradata)[1] = s->bitstream_bpp;
 176     ((uint8_t*)avctx->extradata)[2] = s->interlaced ? 0x10 : 0x20;
 177     if (s->context)
 178         ((uint8_t*)avctx->extradata)[2] |= 0x40;
 179     ((uint8_t*)avctx->extradata)[3] = 0;
 180     s->avctx->extradata_size = 4;
 181
 182     if (avctx->stats_in) {
 183         char *p = avctx->stats_in;
 184
 185         for (i = 0; i < 3; i++)
 186             for (j = 0; j < 256; j++)
 187                 s->stats[i][j] = 1;
 188
 189         for (;;) {
 190             for (i = 0; i < 3; i++) {
 191                 char *next;
 192
 193                 for (j = 0; j < 256; j++) {
 194                     s->stats[i][j] += strtol(p, &next, 0);
 195                     if (next == p) return -1;
 196                     p = next;
 197                 }
 198             }
 199             if (p[0] == 0 || p[1] == 0 || p[2] == 0) break;
 200         }
 201     } else {
 202         for (i = 0; i < 3; i++)
 203             for (j = 0; j < 256; j++) {
 204                 int d = FFMIN(j, 256 - j);
 205
 206                 s->stats[i][j] = 100000000 / (d + 1);
 207             }
 208     }
 209
 210     for (i = 0; i < 3; i++) {
 211         ff_huff_gen_len_table(s->len[i], s->stats[i]);
 212
 213         if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
 214             return -1;
 215         }
 216
 217         s->avctx->extradata_size +=
 218             store_table(s, s->len[i], &((uint8_t*)s->avctx->extradata)[s->avctx->extradata_size]);
 219     }
 220
 221     if (s->context) {
 222         for (i = 0; i < 3; i++) {
 223             int pels = s->width * s->height / (i ? 40 : 10);
 224             for (j = 0; j < 256; j++) {
 225                 int d = FFMIN(j, 256 - j);
 226                 s->stats[i][j] = pels/(d + 1);
 227             }
 228         }
 229     } else {
 230         for (i = 0; i < 3; i++)
 231             for (j = 0; j < 256; j++)
 232                 s->stats[i][j]= 0;
 233     }
 234
 235     ff_huffyuv_alloc_temp(s);
 236
 237     s->picture_number=0;
 238
 239     return 0;
 240 }
 241 static int encode_422_bitstream(HYuvContext *s, int offset, int count)
 242 {
 243     int i;
 244     const uint8_t *y = s->temp[0] + offset;
 245     const uint8_t *u = s->temp[1] + offset / 2;
 246     const uint8_t *v = s->temp[2] + offset / 2;
 247
 248     if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 2 * 4 * count) {
 249         av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 250         return -1;
 251     }
 252
 253 #define LOAD4\
 254             int y0 = y[2 * i];\
 255             int y1 = y[2 * i + 1];\
 256             int u0 = u[i];\
 257             int v0 = v[i];
 258
 259     count /= 2;
 260
 261     if (s->flags & CODEC_FLAG_PASS1) {
 262         for(i = 0; i < count; i++) {
 263             LOAD4;
 264             s->stats[0][y0]++;
 265             s->stats[1][u0]++;
 266             s->stats[0][y1]++;
 267             s->stats[2][v0]++;
 268         }
 269     }
 270     if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)
 271         return 0;
 272     if (s->context) {
 273         for (i = 0; i < count; i++) {
 274             LOAD4;
 275             s->stats[0][y0]++;
 276             put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
 277             s->stats[1][u0]++;
 278             put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
 279             s->stats[0][y1]++;
 280             put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
 281             s->stats[2][v0]++;
 282             put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
 283         }
 284     } else {
 285         for(i = 0; i < count; i++) {
 286             LOAD4;
 287             put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
 288             put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
 289             put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
 290             put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
 291         }
 292     }
 293     return 0;
 294 }
 295
 296 static int encode_gray_bitstream(HYuvContext *s, int count)
 297 {
 298     int i;
 299
 300     if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 4 * count) {
 301         av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 302         return -1;
 303     }
 304
 305 #define LOAD2\
 306             int y0 = s->temp[0][2 * i];\
 307             int y1 = s->temp[0][2 * i + 1];
 308 #define STAT2\
 309             s->stats[0][y0]++;\
 310             s->stats[0][y1]++;
 311 #define WRITE2\
 312             put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);\
 313             put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
 314
 315     count /= 2;
 316
 317     if (s->flags & CODEC_FLAG_PASS1) {
 318         for (i = 0; i < count; i++) {
 319             LOAD2;
 320             STAT2;
 321         }
 322     }
 323     if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)
 324         return 0;
 325
 326     if (s->context) {
 327         for (i = 0; i < count; i++) {
 328             LOAD2;
 329             STAT2;
 330             WRITE2;
 331         }
 332     } else {
 333         for (i = 0; i < count; i++) {
 334             LOAD2;
 335             WRITE2;
 336         }
 337     }
 338     return 0;
 339 }
 340
 341 static int encode_bgr_bitstream(HYuvContext *s, int count)
 342 {
 343     int i;
 344
 345     if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 3 * 4 * count) {
 346         av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 347         return -1;
 348     }
 349
 350 #define LOAD3\
 351             int g =  s->temp[0][4 * i + G];\
 352             int b = (s->temp[0][4 * i + B] - g) & 0xff;\
 353             int r = (s->temp[0][4 * i + R] - g) & 0xff;
 354 #define STAT3\
 355             s->stats[0][b]++;\
 356             s->stats[1][g]++;\
 357             s->stats[2][r]++;
 358 #define WRITE3\
 359             put_bits(&s->pb, s->len[1][g], s->bits[1][g]);\
 360             put_bits(&s->pb, s->len[0][b], s->bits[0][b]);\
 361             put_bits(&s->pb, s->len[2][r], s->bits[2][r]);
 362
 363     if ((s->flags & CODEC_FLAG_PASS1) &&
 364         (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)) {
 365         for (i = 0; i < count; i++) {
 366             LOAD3;
 367             STAT3;
 368         }
 369     } else if (s->context || (s->flags & CODEC_FLAG_PASS1)) {
 370         for (i = 0; i < count; i++) {
 371             LOAD3;
 372             STAT3;
 373             WRITE3;
 374         }
 375     } else {
 376         for (i = 0; i < count; i++) {
 377             LOAD3;
 378             WRITE3;
 379         }
 380     }
 381     return 0;
 382 }
 383
 384 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 385                         const AVFrame *pict, int *got_packet)
 386 {
 387     HYuvContext *s = avctx->priv_data;
 388     const int width = s->width;
 389     const int width2 = s->width>>1;
 390     const int height = s->height;
 391     const int fake_ystride = s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];
 392     const int fake_ustride = s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];
 393     const int fake_vstride = s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];
 394     AVFrame * const p = &s->picture;
 395     int i, j, size = 0, ret;
 396
 397     if (!pkt->data &&
 398         (ret = av_new_packet(pkt, width * height * 3 * 4 + FF_MIN_BUFFER_SIZE)) < 0) {
 399         av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n");
 400         return ret;
 401     }
 402
 403     *p = *pict;
 404     p->pict_type = AV_PICTURE_TYPE_I;
 405     p->key_frame = 1;
 406
 407     if (s->context) {
 408         for (i = 0; i < 3; i++) {
 409             ff_huff_gen_len_table(s->len[i], s->stats[i]);
 410             if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0)
 411                 return -1;
 412             size += store_table(s, s->len[i], &pkt->data[size]);
 413         }
 414
 415         for (i = 0; i < 3; i++)
 416             for (j = 0; j < 256; j++)
 417                 s->stats[i][j] >>= 1;
 418     }
 419
 420     init_put_bits(&s->pb, pkt->data + size, pkt->size - size);
 421
 422     if (avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
 423         avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
 424         int lefty, leftu, leftv, y, cy;
 425
 426         put_bits(&s->pb, 8, leftv = p->data[2][0]);
 427         put_bits(&s->pb, 8, lefty = p->data[0][1]);
 428         put_bits(&s->pb, 8, leftu = p->data[1][0]);
 429         put_bits(&s->pb, 8,         p->data[0][0]);
 430
 431         lefty = sub_left_prediction(s, s->temp[0], p->data[0], width , 0);
 432         leftu = sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);
 433         leftv = sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);
 434
 435         encode_422_bitstream(s, 2, width-2);
 436
 437         if (s->predictor==MEDIAN) {
 438             int lefttopy, lefttopu, lefttopv;
 439             cy = y = 1;
 440             if (s->interlaced) {
 441                 lefty = sub_left_prediction(s, s->temp[0], p->data[0] + p->linesize[0], width , lefty);
 442                 leftu = sub_left_prediction(s, s->temp[1], p->data[1] + p->linesize[1], width2, leftu);
 443                 leftv = sub_left_prediction(s, s->temp[2], p->data[2] + p->linesize[2], width2, leftv);
 444
 445                 encode_422_bitstream(s, 0, width);
 446                 y++; cy++;
 447             }
 448
 449             lefty = sub_left_prediction(s, s->temp[0], p->data[0] + fake_ystride, 4, lefty);
 450             leftu = sub_left_prediction(s, s->temp[1], p->data[1] + fake_ustride, 2, leftu);
 451             leftv = sub_left_prediction(s, s->temp[2], p->data[2] + fake_vstride, 2, leftv);
 452
 453             encode_422_bitstream(s, 0, 4);
 454
 455             lefttopy = p->data[0][3];
 456             lefttopu = p->data[1][1];
 457             lefttopv = p->data[2][1];
 458             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride + 4, width - 4 , &lefty, &lefttopy);
 459             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride + 2, width2 - 2, &leftu, &lefttopu);
 460             s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride + 2, width2 - 2, &leftv, &lefttopv);
 461             encode_422_bitstream(s, 0, width - 4);
 462             y++; cy++;
 463
 464             for (; y < height; y++,cy++) {
 465                 uint8_t *ydst, *udst, *vdst;
 466
 467                 if (s->bitstream_bpp == 12) {
 468                     while (2 * cy > y) {
 469                         ydst = p->data[0] + p->linesize[0] * y;
 470                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
 471                         encode_gray_bitstream(s, width);
 472                         y++;
 473                     }
 474                     if (y >= height) break;
 475                 }
 476                 ydst = p->data[0] + p->linesize[0] * y;
 477                 udst = p->data[1] + p->linesize[1] * cy;
 478                 vdst = p->data[2] + p->linesize[2] * cy;
 479
 480                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
 481                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);
 482                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);
 483
 484                 encode_422_bitstream(s, 0, width);
 485             }
 486         } else {
 487             for (cy = y = 1; y < height; y++, cy++) {
 488                 uint8_t *ydst, *udst, *vdst;
 489
 490                 /* encode a luma only line & y++ */
 491                 if (s->bitstream_bpp == 12) {
 492                     ydst = p->data[0] + p->linesize[0] * y;
 493
 494                     if (s->predictor == PLANE && s->interlaced < y) {
 495                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
 496
 497                         lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
 498                     } else {
 499                         lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
 500                     }
 501                     encode_gray_bitstream(s, width);
 502                     y++;
 503                     if (y >= height) break;
 504                 }
 505
 506                 ydst = p->data[0] + p->linesize[0] * y;
 507                 udst = p->data[1] + p->linesize[1] * cy;
 508                 vdst = p->data[2] + p->linesize[2] * cy;
 509
 510                 if (s->predictor == PLANE && s->interlaced < cy) {
 511                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
 512                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);
 513                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);
 514
 515                     lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
 516                     leftu = sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);
 517                     leftv = sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);
 518                 } else {
 519                     lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
 520                     leftu = sub_left_prediction(s, s->temp[1], udst, width2, leftu);
 521                     leftv = sub_left_prediction(s, s->temp[2], vdst, width2, leftv);
 522                 }
 523
 524                 encode_422_bitstream(s, 0, width);
 525             }
 526         }
 527     } else if(avctx->pix_fmt == AV_PIX_FMT_RGB32) {
 528         uint8_t *data = p->data[0] + (height - 1) * p->linesize[0];
 529         const int stride = -p->linesize[0];
 530         const int fake_stride = -fake_ystride;
 531         int y;
 532         int leftr, leftg, leftb;
 533
 534         put_bits(&s->pb, 8, leftr = data[R]);
 535         put_bits(&s->pb, 8, leftg = data[G]);
 536         put_bits(&s->pb, 8, leftb = data[B]);
 537         put_bits(&s->pb, 8, 0);
 538
 539         sub_left_prediction_bgr32(s, s->temp[0], data + 4, width - 1, &leftr, &leftg, &leftb);
 540         encode_bgr_bitstream(s, width - 1);
 541
 542         for (y = 1; y < s->height; y++) {
 543             uint8_t *dst = data + y*stride;
 544             if (s->predictor == PLANE && s->interlaced < y) {
 545                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width * 4);
 546                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);
 547             } else {
 548                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);
 549             }
 550             encode_bgr_bitstream(s, width);
 551         }
 552     } else {
 553         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");
 554     }
 555     emms_c();
 556
 557     size += (put_bits_count(&s->pb) + 31) / 8;
 558     put_bits(&s->pb, 16, 0);
 559     put_bits(&s->pb, 15, 0);
 560     size /= 4;
 561
 562     if ((s->flags&CODEC_FLAG_PASS1) && (s->picture_number & 31) == 0) {
 563         int j;
 564         char *p = avctx->stats_out;
 565         char *end = p + 1024*30;
 566         for (i = 0; i < 3; i++) {
 567             for (j = 0; j < 256; j++) {
 568                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);
 569                 p += strlen(p);
 570                 s->stats[i][j]= 0;
 571             }
 572             snprintf(p, end-p, "\n");
 573             p++;
 574         }
 575     } else
 576         avctx->stats_out[0] = '\0';
 577     if (!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)) {
 578         flush_put_bits(&s->pb);
 579         s->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
 580     }
 581
 582     s->picture_number++;
 583
 584     pkt->size   = size * 4;
 585     pkt->flags |= AV_PKT_FLAG_KEY;
 586     *got_packet = 1;
 587
 588     return 0;
 589 }
 590
 591 static av_cold int encode_end(AVCodecContext *avctx)
 592 {
 593     HYuvContext *s = avctx->priv_data;
 594
 595     ff_huffyuv_common_end(s);
 596
 597     av_freep(&avctx->extradata);
 598     av_freep(&avctx->stats_out);
 599
 600     return 0;
 601 }
 602
 603 #if CONFIG_HUFFYUV_ENCODER
 604 AVCodec ff_huffyuv_encoder = {
 605     .name           = "huffyuv",
 606     .type           = AVMEDIA_TYPE_VIDEO,
 607     .id             = AV_CODEC_ID_HUFFYUV,
 608     .priv_data_size = sizeof(HYuvContext),
 609     .init           = encode_init,
 610     .encode2        = encode_frame,
 611     .close          = encode_end,
 612     .pix_fmts       = (const enum AVPixelFormat[]){
 613         AV_PIX_FMT_YUV422P, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
 614     },
 615     .long_name      = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
 616 };
 617 #endif
 618
 619 #if CONFIG_FFVHUFF_ENCODER
 620 AVCodec ff_ffvhuff_encoder = {
 621     .name           = "ffvhuff",
 622     .type           = AVMEDIA_TYPE_VIDEO,
 623     .id             = AV_CODEC_ID_FFVHUFF,
 624     .priv_data_size = sizeof(HYuvContext),
 625     .init           = encode_init,
 626     .encode2        = encode_frame,
 627     .close          = encode_end,
 628     .pix_fmts       = (const enum AVPixelFormat[]){
 629         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
 630     },
 631     .long_name      = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
 632 };
 633 #endif