git.sesse.net Git - ffmpeg/blob - libavcodec/mpeg12enc.c

   1 /*
   2  * MPEG-1/2 encoder
   3  * Copyright (c) 2000,2001 Fabrice Bellard
   4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * Libav is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * MPEG-1/2 encoder
  26  */
  27
  28 #include <stdint.h>
  29
  30 #include "libavutil/attributes.h"
  31 #include "libavutil/log.h"
  32 #include "libavutil/opt.h"
  33 #include "libavutil/stereo3d.h"
  34
  35 #include "avcodec.h"
  36 #include "bytestream.h"
  37 #include "mathops.h"
  38 #include "mpeg12.h"
  39 #include "mpeg12data.h"
  40 #include "mpegutils.h"
  41 #include "mpegvideo.h"
  42
  43
  44 static const uint8_t inv_non_linear_qscale[] = {
  45     0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
  46 };
  47
  48 static const uint8_t svcd_scan_offset_placeholder[] = {
  49     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
  50     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  51 };
  52
  53 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
  54 static uint8_t fcode_tab[MAX_MV * 2 + 1];
  55
  56 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
  57 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
  58
  59 /* simple include everything table for dc, first byte is bits
  60  * number next 3 are code */
  61 static uint32_t mpeg1_lum_dc_uni[512];
  62 static uint32_t mpeg1_chr_dc_uni[512];
  63
  64 static uint8_t mpeg1_index_run[2][64];
  65 static int8_t  mpeg1_max_level[2][64];
  66
  67 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
  68 {
  69     int i;
  70
  71     for (i = 0; i < 128; i++) {
  72         int level = i - 64;
  73         int run;
  74         if (!level)
  75             continue;
  76         for (run = 0; run < 64; run++) {
  77             int len, code;
  78             int alevel = FFABS(level);
  79
  80             if (alevel > rl->max_level[0][run])
  81                 code = 111;                         /* rl->n */
  82             else
  83                 code = rl->index_run[0][run] + alevel - 1;
  84
  85             if (code < 111) {                       /* rl->n */
  86                 /* length of VLC and sign */
  87                 len = rl->table_vlc[code][1] + 1;
  88             } else {
  89                 len = rl->table_vlc[111][1] + 6;    /* rl->n */
  90
  91                 if (alevel < 128)
  92                     len += 8;
  93                 else
  94                     len += 16;
  95             }
  96
  97             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
  98         }
  99     }
 100 }
 101
 102 static int find_frame_rate_index(MpegEncContext *s)
 103 {
 104     int i;
 105     int64_t dmin = INT64_MAX;
 106     int64_t d;
 107
 108     for (i = 1; i < 14; i++) {
 109         int64_t n0 = 1001LL / ff_mpeg12_frame_rate_tab[i].den *
 110                      ff_mpeg12_frame_rate_tab[i].num * s->avctx->time_base.num;
 111         int64_t n1 = 1001LL * s->avctx->time_base.den;
 112
 113         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
 114             i >= 9)
 115             break;
 116
 117         d = FFABS(n0 - n1);
 118         if (d < dmin) {
 119             dmin                = d;
 120             s->frame_rate_index = i;
 121         }
 122     }
 123
 124     if (dmin)
 125         return -1;
 126     else
 127         return 0;
 128 }
 129
 130 static av_cold int encode_init(AVCodecContext *avctx)
 131 {
 132     MpegEncContext *s = avctx->priv_data;
 133
 134     if (ff_mpv_encode_init(avctx) < 0)
 135         return -1;
 136
 137     if (find_frame_rate_index(s) < 0) {
 138         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 139             av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
 140                    avctx->time_base.den, avctx->time_base.num);
 141             return -1;
 142         } else {
 143             av_log(avctx, AV_LOG_INFO,
 144                    "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
 145                    avctx->time_base.den, avctx->time_base.num);
 146         }
 147     }
 148
 149     if (avctx->profile == FF_PROFILE_UNKNOWN) {
 150         if (avctx->level != FF_LEVEL_UNKNOWN) {
 151             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
 152             return -1;
 153         }
 154         /* Main or 4:2:2 */
 155         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
 156     }
 157
 158     if (avctx->level == FF_LEVEL_UNKNOWN) {
 159         if (avctx->profile == 0) {                  /* 4:2:2 */
 160             if (avctx->width <= 720 && avctx->height <= 608)
 161                 avctx->level = 5;                   /* Main */
 162             else
 163                 avctx->level = 2;                   /* High */
 164         } else {
 165             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
 166                 av_log(avctx, AV_LOG_ERROR,
 167                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
 168                 return -1;
 169             }
 170             if (avctx->width <= 720 && avctx->height <= 576)
 171                 avctx->level = 8;                   /* Main */
 172             else if (avctx->width <= 1440)
 173                 avctx->level = 6;                   /* High 1440 */
 174             else
 175                 avctx->level = 4;                   /* High */
 176         }
 177     }
 178
 179     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
 180         av_log(avctx, AV_LOG_ERROR,
 181                "Drop frame time code only allowed with 1001/30000 fps\n");
 182         return -1;
 183     }
 184
 185 #if FF_API_PRIVATE_OPT
 186 FF_DISABLE_DEPRECATION_WARNINGS
 187     if (avctx->timecode_frame_start)
 188         s->timecode_frame_start = avctx->timecode_frame_start;
 189 FF_ENABLE_DEPRECATION_WARNINGS
 190 #endif
 191
 192     return 0;
 193 }
 194
 195 static void put_header(MpegEncContext *s, int header)
 196 {
 197     avpriv_align_put_bits(&s->pb);
 198     put_bits(&s->pb, 16, header >> 16);
 199     put_sbits(&s->pb, 16, header);
 200 }
 201
 202 /* put sequence header if needed */
 203 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 204 {
 205     unsigned int vbv_buffer_size, fps, v;
 206     int i, constraint_parameter_flag;
 207     uint64_t time_code;
 208     float best_aspect_error = 1E10;
 209     float aspect_ratio      = av_q2d(s->avctx->sample_aspect_ratio);
 210
 211     if (aspect_ratio == 0.0)
 212         aspect_ratio = 1.0;             // pixel aspect 1.1 (VGA)
 213
 214     if (s->current_picture.f->key_frame) {
 215         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 216
 217         /* MPEG-1 header repeated every GOP */
 218         put_header(s, SEQ_START_CODE);
 219
 220         put_sbits(&s->pb, 12, s->width);
 221         put_sbits(&s->pb, 12, s->height);
 222
 223         for (i = 1; i < 15; i++) {
 224             float error = aspect_ratio;
 225             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
 226                 error -= 1.0 / ff_mpeg1_aspect[i];
 227             else
 228                 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
 229
 230             error = FFABS(error);
 231
 232             if (error < best_aspect_error) {
 233                 best_aspect_error    = error;
 234                 s->aspect_ratio_info = i;
 235             }
 236         }
 237
 238         put_bits(&s->pb, 4, s->aspect_ratio_info);
 239         put_bits(&s->pb, 4, s->frame_rate_index);
 240
 241         if (s->avctx->rc_max_rate) {
 242             v = (s->avctx->rc_max_rate + 399) / 400;
 243             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 244                 v = 0x3ffff;
 245         } else {
 246             v = 0x3FFFF;
 247         }
 248
 249         if (s->avctx->rc_buffer_size)
 250             vbv_buffer_size = s->avctx->rc_buffer_size;
 251         else
 252             /* VBV calculation: Scaled so that a VCD has the proper
 253              * VBV size of 40 kilobytes */
 254             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
 255         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
 256
 257         put_sbits(&s->pb, 18, v);
 258         put_bits(&s->pb, 1, 1);         // marker
 259         put_sbits(&s->pb, 10, vbv_buffer_size);
 260
 261         constraint_parameter_flag =
 262             s->width  <= 768                                    &&
 263             s->height <= 576                                    &&
 264             s->mb_width * s->mb_height                 <= 396   &&
 265             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
 266             framerate.num <= framerate.den * 30                 &&
 267             s->avctx->me_range                                  &&
 268             s->avctx->me_range < 128                            &&
 269             vbv_buffer_size <= 20                               &&
 270             v <= 1856000 / 400                                  &&
 271             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
 272
 273         put_bits(&s->pb, 1, constraint_parameter_flag);
 274
 275         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 276         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 277
 278         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 279             put_header(s, EXT_START_CODE);
 280             put_bits(&s->pb, 4, 1);                 // seq ext
 281
 282             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
 283
 284             put_bits(&s->pb, 3, s->avctx->profile); // profile
 285             put_bits(&s->pb, 4, s->avctx->level);   // level
 286
 287             put_bits(&s->pb, 1, s->progressive_sequence);
 288             put_bits(&s->pb, 2, s->chroma_format);
 289             put_bits(&s->pb, 2, s->width  >> 12);
 290             put_bits(&s->pb, 2, s->height >> 12);
 291             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
 292             put_bits(&s->pb, 1, 1);                 // marker
 293             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
 294             put_bits(&s->pb, 1, s->low_delay);
 295             put_bits(&s->pb, 2, 0);                 // frame_rate_ext_n
 296             put_bits(&s->pb, 5, 0);                 // frame_rate_ext_d
 297
 298             put_header(s, EXT_START_CODE);
 299             put_bits(&s->pb, 4, 2);                         // sequence display extension
 300             put_bits(&s->pb, 3, 0);                         // video_format: 0 is components
 301             put_bits(&s->pb, 1, 1);                         // colour_description
 302             put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
 303             put_bits(&s->pb, 8, s->avctx->color_trc);       // transfer_characteristics
 304             put_bits(&s->pb, 8, s->avctx->colorspace);      // matrix_coefficients
 305             put_bits(&s->pb, 14, s->width);                 // display_horizontal_size
 306             put_bits(&s->pb, 1, 1);                         // marker_bit
 307             put_bits(&s->pb, 14, s->height);                // display_vertical_size
 308             put_bits(&s->pb, 3, 0);                         // remaining 3 bits are zero padding
 309         }
 310
 311         put_header(s, GOP_START_CODE);
 312         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
 313         /* time code: we must convert from the real frame rate to a
 314          * fake MPEG frame rate in case of low frame rate */
 315         fps       = (framerate.num + framerate.den / 2) / framerate.den;
 316         time_code = s->current_picture_ptr->f->coded_picture_number +
 317                     s->timecode_frame_start;
 318
 319         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
 320         if (s->drop_frame_timecode) {
 321             /* only works for NTSC 29.97 */
 322             int d = time_code / 17982;
 323             int m = time_code % 17982;
 324             /* not needed since -2,-1 / 1798 in C returns 0 */
 325             // if (m < 2)
 326             //     m += 2;
 327             time_code += 18 * d + 2 * ((m - 2) / 1798);
 328         }
 329         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
 330         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
 331         put_bits(&s->pb, 1, 1);
 332         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
 333         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
 334         put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only);
 335         put_bits(&s->pb, 1, 0);                     // broken link
 336     }
 337 }
 338
 339 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 340 {
 341     while (run >= 33) {
 342         put_bits(&s->pb, 11, 0x008);
 343         run -= 33;
 344     }
 345     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 346              ff_mpeg12_mbAddrIncrTable[run][0]);
 347 }
 348
 349 static av_always_inline void put_qscale(MpegEncContext *s)
 350 {
 351     if (s->q_scale_type) {
 352         assert(s->qscale >= 1 && s->qscale <= 12);
 353         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
 354     } else {
 355         put_bits(&s->pb, 5, s->qscale);
 356     }
 357 }
 358
 359 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 360 {
 361     if (s->height > 2800) {
 362         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
 363         /* slice_vertical_position_extension */
 364         put_bits(&s->pb, 3, s->mb_y >> 7);
 365     } else {
 366         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 367     }
 368     put_qscale(s);
 369     /* slice extra information */
 370     put_bits(&s->pb, 1, 0);
 371 }
 372
 373 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 374 {
 375     AVFrameSideData *side_data;
 376     mpeg1_encode_sequence_header(s);
 377
 378     /* MPEG-1 picture header */
 379     put_header(s, PICTURE_START_CODE);
 380     /* temporal reference */
 381
 382     // RAL: s->picture_number instead of s->fake_picture_number
 383     put_bits(&s->pb, 10,
 384              (s->picture_number - s->gop_picture_number) & 0x3ff);
 385     put_bits(&s->pb, 3, s->pict_type);
 386
 387     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 388     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 389
 390     // RAL: Forward f_code also needed for B-frames
 391     if (s->pict_type == AV_PICTURE_TYPE_P ||
 392         s->pict_type == AV_PICTURE_TYPE_B) {
 393         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 394         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 395             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
 396         else
 397             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 398     }
 399
 400     // RAL: Backward f_code necessary for B-frames
 401     if (s->pict_type == AV_PICTURE_TYPE_B) {
 402         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 403         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 404             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
 405         else
 406             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 407     }
 408
 409     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 410
 411     s->frame_pred_frame_dct = 1;
 412     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 413         put_header(s, EXT_START_CODE);
 414         put_bits(&s->pb, 4, 8);                 /* pic ext */
 415         if (s->pict_type == AV_PICTURE_TYPE_P ||
 416             s->pict_type == AV_PICTURE_TYPE_B) {
 417             put_bits(&s->pb, 4, s->f_code);
 418             put_bits(&s->pb, 4, s->f_code);
 419         } else {
 420             put_bits(&s->pb, 8, 255);
 421         }
 422         if (s->pict_type == AV_PICTURE_TYPE_B) {
 423             put_bits(&s->pb, 4, s->b_code);
 424             put_bits(&s->pb, 4, s->b_code);
 425         } else {
 426             put_bits(&s->pb, 8, 255);
 427         }
 428         put_bits(&s->pb, 2, s->intra_dc_precision);
 429
 430         assert(s->picture_structure == PICT_FRAME);
 431         put_bits(&s->pb, 2, s->picture_structure);
 432         if (s->progressive_sequence)
 433             put_bits(&s->pb, 1, 0);             /* no repeat */
 434         else
 435             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
 436         /* XXX: optimize the generation of this flag with entropy measures */
 437         s->frame_pred_frame_dct = s->progressive_sequence;
 438
 439         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
 440         put_bits(&s->pb, 1, s->concealment_motion_vectors);
 441         put_bits(&s->pb, 1, s->q_scale_type);
 442         put_bits(&s->pb, 1, s->intra_vlc_format);
 443         put_bits(&s->pb, 1, s->alternate_scan);
 444         put_bits(&s->pb, 1, s->repeat_first_field);
 445         s->progressive_frame = s->progressive_sequence;
 446         /* chroma_420_type */
 447         put_bits(&s->pb, 1, s->chroma_format ==
 448                             CHROMA_420 ? s->progressive_frame : 0);
 449         put_bits(&s->pb, 1, s->progressive_frame);
 450         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
 451     }
 452     if (s->scan_offset) {
 453         int i;
 454
 455         put_header(s, USER_START_CODE);
 456         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
 457             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
 458     }
 459     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 460                                        AV_FRAME_DATA_STEREO3D);
 461     if (side_data) {
 462         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 463         uint8_t fpa_type;
 464
 465         switch (stereo->type) {
 466         case AV_STEREO3D_SIDEBYSIDE:
 467             fpa_type = 0x03;
 468             break;
 469         case AV_STEREO3D_TOPBOTTOM:
 470             fpa_type = 0x04;
 471             break;
 472         case AV_STEREO3D_2D:
 473             fpa_type = 0x08;
 474             break;
 475         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 476             fpa_type = 0x23;
 477             break;
 478         default:
 479             fpa_type = 0;
 480             break;
 481         }
 482
 483         if (fpa_type != 0) {
 484             put_header(s, USER_START_CODE);
 485             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
 486             put_bits(&s->pb, 8, 'P');
 487             put_bits(&s->pb, 8, '3');
 488             put_bits(&s->pb, 8, 'D');
 489             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
 490
 491             put_bits(&s->pb, 1, 1);     // reserved_bit
 492             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
 493             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
 494             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
 495         }
 496     }
 497
 498     s->mb_y = 0;
 499     ff_mpeg1_encode_slice_header(s);
 500 }
 501
 502 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 503                                 int has_mv, int field_motion)
 504 {
 505     put_bits(&s->pb, n, bits);
 506     if (!s->frame_pred_frame_dct) {
 507         if (has_mv)
 508             /* motion_type: frame/field */
 509             put_bits(&s->pb, 2, 2 - field_motion);
 510         put_bits(&s->pb, 1, s->interlaced_dct);
 511     }
 512 }
 513
 514 // RAL: Parameter added: f_or_b_code
 515 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 516 {
 517     if (val == 0) {
 518         /* zero vector */
 519         put_bits(&s->pb,
 520                  ff_mpeg12_mbMotionVectorTable[0][1],
 521                  ff_mpeg12_mbMotionVectorTable[0][0]);
 522     } else {
 523         int code, sign, bits;
 524         int bit_size = f_or_b_code - 1;
 525         int range    = 1 << bit_size;
 526         /* modulo encoding */
 527         val = sign_extend(val, 5 + bit_size);
 528
 529         if (val >= 0) {
 530             val--;
 531             code = (val >> bit_size) + 1;
 532             bits = val & (range - 1);
 533             sign = 0;
 534         } else {
 535             val = -val;
 536             val--;
 537             code = (val >> bit_size) + 1;
 538             bits = val & (range - 1);
 539             sign = 1;
 540         }
 541
 542         assert(code > 0 && code <= 16);
 543
 544         put_bits(&s->pb,
 545                  ff_mpeg12_mbMotionVectorTable[code][1],
 546                  ff_mpeg12_mbMotionVectorTable[code][0]);
 547
 548         put_bits(&s->pb, 1, sign);
 549         if (bit_size > 0)
 550             put_bits(&s->pb, bit_size, bits);
 551     }
 552 }
 553
 554 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 555 {
 556     unsigned int diff_u = diff + 255;
 557     if (diff_u >= 511) {
 558         int index;
 559
 560         if (diff < 0) {
 561             index = av_log2_16bit(-2 * diff);
 562             diff--;
 563         } else {
 564             index = av_log2_16bit(2 * diff);
 565         }
 566         if (component == 0)
 567             put_bits(&s->pb,
 568                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 569                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 570                      (diff & ((1 << index) - 1)));
 571         else
 572             put_bits(&s->pb,
 573                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 574                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 575                      (diff & ((1 << index) - 1)));
 576     } else {
 577         if (component == 0)
 578             put_bits(&s->pb,
 579                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 580                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 581         else
 582             put_bits(&s->pb,
 583                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 584                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 585     }
 586 }
 587
 588 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 589 {
 590     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 591     int code, component;
 592     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 593
 594     last_index = s->block_last_index[n];
 595
 596     /* DC coef */
 597     if (s->mb_intra) {
 598         component = (n <= 3 ? 0 : (n & 1) + 1);
 599         dc        = block[0];                   /* overflow is impossible */
 600         diff      = dc - s->last_dc[component];
 601         encode_dc(s, diff, component);
 602         s->last_dc[component] = dc;
 603         i = 1;
 604         if (s->intra_vlc_format)
 605             table_vlc = ff_rl_mpeg2.table_vlc;
 606     } else {
 607         /* encode the first coefficient: needs to be done here because
 608          * it is handled slightly differently */
 609         level = block[0];
 610         if (abs(level) == 1) {
 611             code = ((uint32_t)level >> 31);     /* the sign bit */
 612             put_bits(&s->pb, 2, code | 0x02);
 613             i = 1;
 614         } else {
 615             i             = 0;
 616             last_non_zero = -1;
 617             goto next_coef;
 618         }
 619     }
 620
 621     /* now quantify & encode AC coefs */
 622     last_non_zero = i - 1;
 623
 624     for (; i <= last_index; i++) {
 625         j     = s->intra_scantable.permutated[i];
 626         level = block[j];
 627
 628 next_coef:
 629         /* encode using VLC */
 630         if (level != 0) {
 631             run = i - last_non_zero - 1;
 632
 633             alevel = level;
 634             MASK_ABS(sign, alevel);
 635             sign &= 1;
 636
 637             if (alevel <= mpeg1_max_level[0][run]) {
 638                 code = mpeg1_index_run[0][run] + alevel - 1;
 639                 /* store the VLC & sign at once */
 640                 put_bits(&s->pb, table_vlc[code][1] + 1,
 641                          (table_vlc[code][0] << 1) + sign);
 642             } else {
 643                 /* escape seems to be pretty rare <5% so I do not optimize it */
 644                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 645                 /* escape: only clip in this case */
 646                 put_bits(&s->pb, 6, run);
 647                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 648                     if (alevel < 128) {
 649                         put_sbits(&s->pb, 8, level);
 650                     } else {
 651                         if (level < 0)
 652                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 653                         else
 654                             put_sbits(&s->pb, 16, level);
 655                     }
 656                 } else {
 657                     put_sbits(&s->pb, 12, level);
 658                 }
 659             }
 660             last_non_zero = i;
 661         }
 662     }
 663     /* end of block */
 664     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 665 }
 666
 667 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 668                                                       int16_t block[8][64],
 669                                                       int motion_x, int motion_y,
 670                                                       int mb_block_count)
 671 {
 672     int i, cbp;
 673     const int mb_x     = s->mb_x;
 674     const int mb_y     = s->mb_y;
 675     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 676
 677     /* compute cbp */
 678     cbp = 0;
 679     for (i = 0; i < mb_block_count; i++)
 680         if (s->block_last_index[i] >= 0)
 681             cbp |= 1 << (mb_block_count - 1 - i);
 682
 683     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 684         (mb_x != s->mb_width - 1 ||
 685          (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 686         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 687          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 688           (((s->mv_dir & MV_DIR_FORWARD)
 689             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 690                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 691            ((s->mv_dir & MV_DIR_BACKWARD)
 692             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 693                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 694         s->mb_skip_run++;
 695         s->qscale -= s->dquant;
 696         s->skip_count++;
 697         s->misc_bits++;
 698         s->last_bits++;
 699         if (s->pict_type == AV_PICTURE_TYPE_P) {
 700             s->last_mv[0][0][0] =
 701             s->last_mv[0][0][1] =
 702             s->last_mv[0][1][0] =
 703             s->last_mv[0][1][1] = 0;
 704         }
 705     } else {
 706         if (first_mb) {
 707             assert(s->mb_skip_run == 0);
 708             encode_mb_skip_run(s, s->mb_x);
 709         } else {
 710             encode_mb_skip_run(s, s->mb_skip_run);
 711         }
 712
 713         if (s->pict_type == AV_PICTURE_TYPE_I) {
 714             if (s->dquant && cbp) {
 715                 /* macroblock_type: macroblock_quant = 1 */
 716                 put_mb_modes(s, 2, 1, 0, 0);
 717                 put_qscale(s);
 718             } else {
 719                 /* macroblock_type: macroblock_quant = 0 */
 720                 put_mb_modes(s, 1, 1, 0, 0);
 721                 s->qscale -= s->dquant;
 722             }
 723             s->misc_bits += get_bits_diff(s);
 724             s->i_count++;
 725         } else if (s->mb_intra) {
 726             if (s->dquant && cbp) {
 727                 put_mb_modes(s, 6, 0x01, 0, 0);
 728                 put_qscale(s);
 729             } else {
 730                 put_mb_modes(s, 5, 0x03, 0, 0);
 731                 s->qscale -= s->dquant;
 732             }
 733             s->misc_bits += get_bits_diff(s);
 734             s->i_count++;
 735             memset(s->last_mv, 0, sizeof(s->last_mv));
 736         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 737             if (s->mv_type == MV_TYPE_16X16) {
 738                 if (cbp != 0) {
 739                     if ((motion_x | motion_y) == 0) {
 740                         if (s->dquant) {
 741                             /* macroblock_pattern & quant */
 742                             put_mb_modes(s, 5, 1, 0, 0);
 743                             put_qscale(s);
 744                         } else {
 745                             /* macroblock_pattern only */
 746                             put_mb_modes(s, 2, 1, 0, 0);
 747                         }
 748                         s->misc_bits += get_bits_diff(s);
 749                     } else {
 750                         if (s->dquant) {
 751                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 752                             put_qscale(s);
 753                         } else {
 754                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 755                         }
 756                         s->misc_bits += get_bits_diff(s);
 757                         // RAL: f_code parameter added
 758                         mpeg1_encode_motion(s,
 759                                             motion_x - s->last_mv[0][0][0],
 760                                             s->f_code);
 761                         // RAL: f_code parameter added
 762                         mpeg1_encode_motion(s,
 763                                             motion_y - s->last_mv[0][0][1],
 764                                             s->f_code);
 765                         s->mv_bits += get_bits_diff(s);
 766                     }
 767                 } else {
 768                     put_bits(&s->pb, 3, 1);         /* motion only */
 769                     if (!s->frame_pred_frame_dct)
 770                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 771                     s->misc_bits += get_bits_diff(s);
 772                     // RAL: f_code parameter added
 773                     mpeg1_encode_motion(s,
 774                                         motion_x - s->last_mv[0][0][0],
 775                                         s->f_code);
 776                     // RAL: f_code parameter added
 777                     mpeg1_encode_motion(s,
 778                                         motion_y - s->last_mv[0][0][1],
 779                                         s->f_code);
 780                     s->qscale  -= s->dquant;
 781                     s->mv_bits += get_bits_diff(s);
 782                 }
 783                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 784                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 785             } else {
 786                 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 787
 788                 if (cbp) {
 789                     if (s->dquant) {
 790                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 791                         put_qscale(s);
 792                     } else {
 793                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 794                     }
 795                 } else {
 796                     put_bits(&s->pb, 3, 1);             /* motion only */
 797                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 798                     s->qscale -= s->dquant;
 799                 }
 800                 s->misc_bits += get_bits_diff(s);
 801                 for (i = 0; i < 2; i++) {
 802                     put_bits(&s->pb, 1, s->field_select[0][i]);
 803                     mpeg1_encode_motion(s,
 804                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 805                                         s->f_code);
 806                     mpeg1_encode_motion(s,
 807                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 808                                         s->f_code);
 809                     s->last_mv[0][i][0] = s->mv[0][i][0];
 810                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 811                 }
 812                 s->mv_bits += get_bits_diff(s);
 813             }
 814             if (cbp) {
 815                 if (s->chroma_y_shift) {
 816                     put_bits(&s->pb,
 817                              ff_mpeg12_mbPatTable[cbp][1],
 818                              ff_mpeg12_mbPatTable[cbp][0]);
 819                 } else {
 820                     put_bits(&s->pb,
 821                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 822                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 823                     put_sbits(&s->pb, 2, cbp);
 824                 }
 825             }
 826             s->f_count++;
 827         } else {
 828             if (s->mv_type == MV_TYPE_16X16) {
 829                 if (cbp) {                      // With coded bloc pattern
 830                     if (s->dquant) {
 831                         if (s->mv_dir == MV_DIR_FORWARD)
 832                             put_mb_modes(s, 6, 3, 1, 0);
 833                         else
 834                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 835                         put_qscale(s);
 836                     } else {
 837                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 838                     }
 839                 } else {                        // No coded bloc pattern
 840                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 841                     if (!s->frame_pred_frame_dct)
 842                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 843                     s->qscale -= s->dquant;
 844                 }
 845                 s->misc_bits += get_bits_diff(s);
 846                 if (s->mv_dir & MV_DIR_FORWARD) {
 847                     mpeg1_encode_motion(s,
 848                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 849                                         s->f_code);
 850                     mpeg1_encode_motion(s,
 851                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 852                                         s->f_code);
 853                     s->last_mv[0][0][0] =
 854                     s->last_mv[0][1][0] = s->mv[0][0][0];
 855                     s->last_mv[0][0][1] =
 856                     s->last_mv[0][1][1] = s->mv[0][0][1];
 857                     s->f_count++;
 858                 }
 859                 if (s->mv_dir & MV_DIR_BACKWARD) {
 860                     mpeg1_encode_motion(s,
 861                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 862                                         s->b_code);
 863                     mpeg1_encode_motion(s,
 864                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 865                                         s->b_code);
 866                     s->last_mv[1][0][0] =
 867                     s->last_mv[1][1][0] = s->mv[1][0][0];
 868                     s->last_mv[1][0][1] =
 869                     s->last_mv[1][1][1] = s->mv[1][0][1];
 870                     s->b_count++;
 871                 }
 872             } else {
 873                 assert(s->mv_type == MV_TYPE_FIELD);
 874                 assert(!s->frame_pred_frame_dct);
 875                 if (cbp) {                      // With coded bloc pattern
 876                     if (s->dquant) {
 877                         if (s->mv_dir == MV_DIR_FORWARD)
 878                             put_mb_modes(s, 6, 3, 1, 1);
 879                         else
 880                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 881                         put_qscale(s);
 882                     } else {
 883                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 884                     }
 885                 } else {                        // No coded bloc pattern
 886                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 887                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 888                     s->qscale -= s->dquant;
 889                 }
 890                 s->misc_bits += get_bits_diff(s);
 891                 if (s->mv_dir & MV_DIR_FORWARD) {
 892                     for (i = 0; i < 2; i++) {
 893                         put_bits(&s->pb, 1, s->field_select[0][i]);
 894                         mpeg1_encode_motion(s,
 895                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 896                                             s->f_code);
 897                         mpeg1_encode_motion(s,
 898                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 899                                             s->f_code);
 900                         s->last_mv[0][i][0] = s->mv[0][i][0];
 901                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 902                     }
 903                     s->f_count++;
 904                 }
 905                 if (s->mv_dir & MV_DIR_BACKWARD) {
 906                     for (i = 0; i < 2; i++) {
 907                         put_bits(&s->pb, 1, s->field_select[1][i]);
 908                         mpeg1_encode_motion(s,
 909                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 910                                             s->b_code);
 911                         mpeg1_encode_motion(s,
 912                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 913                                             s->b_code);
 914                         s->last_mv[1][i][0] = s->mv[1][i][0];
 915                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 916                     }
 917                     s->b_count++;
 918                 }
 919             }
 920             s->mv_bits += get_bits_diff(s);
 921             if (cbp) {
 922                 if (s->chroma_y_shift) {
 923                     put_bits(&s->pb,
 924                              ff_mpeg12_mbPatTable[cbp][1],
 925                              ff_mpeg12_mbPatTable[cbp][0]);
 926                 } else {
 927                     put_bits(&s->pb,
 928                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 929                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 930                     put_sbits(&s->pb, 2, cbp);
 931                 }
 932             }
 933         }
 934         for (i = 0; i < mb_block_count; i++)
 935             if (cbp & (1 << (mb_block_count - 1 - i)))
 936                 mpeg1_encode_block(s, block[i], i);
 937         s->mb_skip_run = 0;
 938         if (s->mb_intra)
 939             s->i_tex_bits += get_bits_diff(s);
 940         else
 941             s->p_tex_bits += get_bits_diff(s);
 942     }
 943 }
 944
 945 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
 946                         int motion_x, int motion_y)
 947 {
 948     if (s->chroma_format == CHROMA_420)
 949         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
 950     else
 951         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
 952 }
 953
 954 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
 955 {
 956     static int done = 0;
 957
 958     ff_mpeg12_common_init(s);
 959
 960     if (!done) {
 961         int f_code;
 962         int mv;
 963         int i;
 964
 965         done = 1;
 966         ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
 967         ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
 968
 969         for (i = 0; i < 64; i++) {
 970             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
 971             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
 972         }
 973
 974         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
 975         if (s->intra_vlc_format)
 976             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
 977
 978         /* build unified dc encoding tables */
 979         for (i = -255; i < 256; i++) {
 980             int adiff, index;
 981             int bits, code;
 982             int diff = i;
 983
 984             adiff = FFABS(diff);
 985             if (diff < 0)
 986                 diff--;
 987             index = av_log2(2 * adiff);
 988
 989             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
 990             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 991                    (diff & ((1 << index) - 1));
 992             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
 993
 994             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
 995             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 996                    (diff & ((1 << index) - 1));
 997             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
 998         }
 999
1000         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1001             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1002                 int len;
1003
1004                 if (mv == 0) {
1005                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1006                 } else {
1007                     int val, bit_size, code;
1008
1009                     bit_size = f_code - 1;
1010
1011                     val = mv;
1012                     if (val < 0)
1013                         val = -val;
1014                     val--;
1015                     code = (val >> bit_size) + 1;
1016                     if (code < 17)
1017                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1018                               1 + bit_size;
1019                     else
1020                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1021                               2 + bit_size;
1022                 }
1023
1024                 mv_penalty[f_code][mv + MAX_MV] = len;
1025             }
1026
1027
1028         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1029             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1030                 fcode_tab[mv + MAX_MV] = f_code;
1031     }
1032     s->me.mv_penalty = mv_penalty;
1033     s->fcode_tab     = fcode_tab;
1034     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1035         s->min_qcoeff = -255;
1036         s->max_qcoeff = 255;
1037     } else {
1038         s->min_qcoeff = -2047;
1039         s->max_qcoeff = 2047;
1040     }
1041     if (s->intra_vlc_format) {
1042         s->intra_ac_vlc_length      =
1043         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1044     } else {
1045         s->intra_ac_vlc_length      =
1046         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1047     }
1048     s->inter_ac_vlc_length      =
1049     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1050 }
1051
1052 #define OFFSET(x) offsetof(MpegEncContext, x)
1053 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1054 #define COMMON_OPTS                                                           \
1055     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1056       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1057     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1058       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1059     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1060       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1061     { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1062       OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, VE}, \
1063
1064 static const AVOption mpeg1_options[] = {
1065     COMMON_OPTS
1066     FF_MPV_COMMON_OPTS
1067     { NULL },
1068 };
1069
1070 static const AVOption mpeg2_options[] = {
1071     COMMON_OPTS
1072     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1073     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1074     FF_MPV_COMMON_OPTS
1075     { NULL },
1076 };
1077
1078 #define mpeg12_class(x)                                 \
1079 static const AVClass mpeg ## x ## _class = {            \
1080     .class_name = "mpeg" # x "video encoder",           \
1081     .item_name  = av_default_item_name,                 \
1082     .option     = mpeg ## x ## _options,                \
1083     .version    = LIBAVUTIL_VERSION_INT,                \
1084 };
1085
1086 mpeg12_class(1)
1087 mpeg12_class(2)
1088
1089 AVCodec ff_mpeg1video_encoder = {
1090     .name                 = "mpeg1video",
1091     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1092     .type                 = AVMEDIA_TYPE_VIDEO,
1093     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1094     .priv_data_size       = sizeof(MpegEncContext),
1095     .init                 = encode_init,
1096     .encode2              = ff_mpv_encode_picture,
1097     .close                = ff_mpv_encode_end,
1098     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1099     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1100                                                            AV_PIX_FMT_NONE },
1101     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1102     .priv_class           = &mpeg1_class,
1103 };
1104
1105 AVCodec ff_mpeg2video_encoder = {
1106     .name                 = "mpeg2video",
1107     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1108     .type                 = AVMEDIA_TYPE_VIDEO,
1109     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1110     .priv_data_size       = sizeof(MpegEncContext),
1111     .init                 = encode_init,
1112     .encode2              = ff_mpv_encode_picture,
1113     .close                = ff_mpv_encode_end,
1114     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1115     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1116                                                            AV_PIX_FMT_YUV422P,
1117                                                            AV_PIX_FMT_NONE },
1118     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1119     .priv_class           = &mpeg2_class,
1120 };