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

   1 /*
   2  * MPEG1/2 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  * MPEG1/2 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 "mpegvideo.h"
  41
  42
  43 static const uint8_t inv_non_linear_qscale[] = {
  44     0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
  45 };
  46
  47 static const uint8_t svcd_scan_offset_placeholder[] = {
  48     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
  49     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  50 };
  51
  52 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
  53 static uint8_t fcode_tab[MAX_MV * 2 + 1];
  54
  55 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
  56 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
  57
  58 /* simple include everything table for dc, first byte is bits
  59  * number next 3 are code */
  60 static uint32_t mpeg1_lum_dc_uni[512];
  61 static uint32_t mpeg1_chr_dc_uni[512];
  62
  63 static uint8_t mpeg1_index_run[2][64];
  64 static int8_t  mpeg1_max_level[2][64];
  65
  66 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
  67 {
  68     int i;
  69
  70     for (i = 0; i < 128; i++) {
  71         int level = i - 64;
  72         int run;
  73         if (!level)
  74             continue;
  75         for (run = 0; run < 64; run++) {
  76             int len, code;
  77             int alevel = FFABS(level);
  78
  79             if (alevel > rl->max_level[0][run])
  80                 code = 111;                         /* rl->n */
  81             else
  82                 code = rl->index_run[0][run] + alevel - 1;
  83
  84             if (code < 111) {                       /* rl->n */
  85                 /* length of VLC and sign */
  86                 len = rl->table_vlc[code][1] + 1;
  87             } else {
  88                 len = rl->table_vlc[111][1] + 6;    /* rl->n */
  89
  90                 if (alevel < 128)
  91                     len += 8;
  92                 else
  93                     len += 16;
  94             }
  95
  96             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
  97         }
  98     }
  99 }
 100
 101 static int find_frame_rate_index(MpegEncContext *s)
 102 {
 103     int i;
 104     int64_t dmin = INT64_MAX;
 105     int64_t d;
 106
 107     for (i = 1; i < 14; i++) {
 108         int64_t n0 = 1001LL / ff_mpeg12_frame_rate_tab[i].den *
 109                      ff_mpeg12_frame_rate_tab[i].num * s->avctx->time_base.num;
 110         int64_t n1 = 1001LL * s->avctx->time_base.den;
 111
 112         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
 113             i >= 9)
 114             break;
 115
 116         d = FFABS(n0 - n1);
 117         if (d < dmin) {
 118             dmin                = d;
 119             s->frame_rate_index = i;
 120         }
 121     }
 122
 123     if (dmin)
 124         return -1;
 125     else
 126         return 0;
 127 }
 128
 129 static av_cold int encode_init(AVCodecContext *avctx)
 130 {
 131     MpegEncContext *s = avctx->priv_data;
 132
 133     if (ff_mpv_encode_init(avctx) < 0)
 134         return -1;
 135
 136     if (find_frame_rate_index(s) < 0) {
 137         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 138             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
 139                    avctx->time_base.den, avctx->time_base.num);
 140             return -1;
 141         } else {
 142             av_log(avctx, AV_LOG_INFO,
 143                    "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
 144                    avctx->time_base.den, avctx->time_base.num);
 145         }
 146     }
 147
 148     if (avctx->profile == FF_PROFILE_UNKNOWN) {
 149         if (avctx->level != FF_LEVEL_UNKNOWN) {
 150             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
 151             return -1;
 152         }
 153         /* Main or 4:2:2 */
 154         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
 155     }
 156
 157     if (avctx->level == FF_LEVEL_UNKNOWN) {
 158         if (avctx->profile == 0) {                  /* 4:2:2 */
 159             if (avctx->width <= 720 && avctx->height <= 608)
 160                 avctx->level = 5;                   /* Main */
 161             else
 162                 avctx->level = 2;                   /* High */
 163         } else {
 164             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
 165                 av_log(avctx, AV_LOG_ERROR,
 166                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
 167                 return -1;
 168             }
 169             if (avctx->width <= 720 && avctx->height <= 576)
 170                 avctx->level = 8;                   /* Main */
 171             else if (avctx->width <= 1440)
 172                 avctx->level = 6;                   /* High 1440 */
 173             else
 174                 avctx->level = 4;                   /* High */
 175         }
 176     }
 177
 178     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
 179         av_log(avctx, AV_LOG_ERROR,
 180                "Drop frame time code only allowed with 1001/30000 fps\n");
 181         return -1;
 182     }
 183
 184     return 0;
 185 }
 186
 187 static void put_header(MpegEncContext *s, int header)
 188 {
 189     avpriv_align_put_bits(&s->pb);
 190     put_bits(&s->pb, 16, header >> 16);
 191     put_sbits(&s->pb, 16, header);
 192 }
 193
 194 /* put sequence header if needed */
 195 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 196 {
 197     unsigned int vbv_buffer_size, fps, v;
 198     int i, constraint_parameter_flag;
 199     uint64_t time_code;
 200     float best_aspect_error = 1E10;
 201     float aspect_ratio      = av_q2d(s->avctx->sample_aspect_ratio);
 202
 203     if (aspect_ratio == 0.0)
 204         aspect_ratio = 1.0;             // pixel aspect 1.1 (VGA)
 205
 206     if (s->current_picture.f->key_frame) {
 207         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 208
 209         /* mpeg1 header repeated every gop */
 210         put_header(s, SEQ_START_CODE);
 211
 212         put_sbits(&s->pb, 12, s->width);
 213         put_sbits(&s->pb, 12, s->height);
 214
 215         for (i = 1; i < 15; i++) {
 216             float error = aspect_ratio;
 217             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
 218                 error -= 1.0 / ff_mpeg1_aspect[i];
 219             else
 220                 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
 221
 222             error = FFABS(error);
 223
 224             if (error < best_aspect_error) {
 225                 best_aspect_error    = error;
 226                 s->aspect_ratio_info = i;
 227             }
 228         }
 229
 230         put_bits(&s->pb, 4, s->aspect_ratio_info);
 231         put_bits(&s->pb, 4, s->frame_rate_index);
 232
 233         if (s->avctx->rc_max_rate) {
 234             v = (s->avctx->rc_max_rate + 399) / 400;
 235             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 236                 v = 0x3ffff;
 237         } else {
 238             v = 0x3FFFF;
 239         }
 240
 241         if (s->avctx->rc_buffer_size)
 242             vbv_buffer_size = s->avctx->rc_buffer_size;
 243         else
 244             /* VBV calculation: Scaled so that a VCD has the proper
 245              * VBV size of 40 kilobytes */
 246             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
 247         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
 248
 249         put_sbits(&s->pb, 18, v);
 250         put_bits(&s->pb, 1, 1);         // marker
 251         put_sbits(&s->pb, 10, vbv_buffer_size);
 252
 253         constraint_parameter_flag =
 254             s->width  <= 768                                    &&
 255             s->height <= 576                                    &&
 256             s->mb_width * s->mb_height                 <= 396   &&
 257             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
 258             framerate.num <= framerate.den * 30                 &&
 259             s->avctx->me_range                                  &&
 260             s->avctx->me_range < 128                            &&
 261             vbv_buffer_size <= 20                               &&
 262             v <= 1856000 / 400                                  &&
 263             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
 264
 265         put_bits(&s->pb, 1, constraint_parameter_flag);
 266
 267         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 268         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 269
 270         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 271             put_header(s, EXT_START_CODE);
 272             put_bits(&s->pb, 4, 1);                 // seq ext
 273
 274             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
 275
 276             put_bits(&s->pb, 3, s->avctx->profile); // profile
 277             put_bits(&s->pb, 4, s->avctx->level);   // level
 278
 279             put_bits(&s->pb, 1, s->progressive_sequence);
 280             put_bits(&s->pb, 2, s->chroma_format);
 281             put_bits(&s->pb, 2, s->width  >> 12);
 282             put_bits(&s->pb, 2, s->height >> 12);
 283             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
 284             put_bits(&s->pb, 1, 1);                 // marker
 285             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
 286             put_bits(&s->pb, 1, s->low_delay);
 287             put_bits(&s->pb, 2, 0);                 // frame_rate_ext_n
 288             put_bits(&s->pb, 5, 0);                 // frame_rate_ext_d
 289
 290             put_header(s, EXT_START_CODE);
 291             put_bits(&s->pb, 4, 2);                         // sequence display extension
 292             put_bits(&s->pb, 3, 0);                         // video_format: 0 is components
 293             put_bits(&s->pb, 1, 1);                         // colour_description
 294             put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
 295             put_bits(&s->pb, 8, s->avctx->color_trc);       // transfer_characteristics
 296             put_bits(&s->pb, 8, s->avctx->colorspace);      // matrix_coefficients
 297             put_bits(&s->pb, 14, s->width);                 // display_horizontal_size
 298             put_bits(&s->pb, 1, 1);                         // marker_bit
 299             put_bits(&s->pb, 14, s->height);                // display_vertical_size
 300             put_bits(&s->pb, 3, 0);                         // remaining 3 bits are zero padding
 301         }
 302
 303         put_header(s, GOP_START_CODE);
 304         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
 305         /* time code: we must convert from the real frame rate to a
 306          * fake MPEG frame rate in case of low frame rate */
 307         fps       = (framerate.num + framerate.den / 2) / framerate.den;
 308         time_code = s->current_picture_ptr->f->coded_picture_number +
 309                     s->avctx->timecode_frame_start;
 310
 311         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
 312         if (s->drop_frame_timecode) {
 313             /* only works for NTSC 29.97 */
 314             int d = time_code / 17982;
 315             int m = time_code % 17982;
 316             /* not needed since -2,-1 / 1798 in C returns 0 */
 317             // if (m < 2)
 318             //     m += 2;
 319             time_code += 18 * d + 2 * ((m - 2) / 1798);
 320         }
 321         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
 322         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
 323         put_bits(&s->pb, 1, 1);
 324         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
 325         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
 326         put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
 327         put_bits(&s->pb, 1, 0);                     // broken link
 328     }
 329 }
 330
 331 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 332 {
 333     while (run >= 33) {
 334         put_bits(&s->pb, 11, 0x008);
 335         run -= 33;
 336     }
 337     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 338              ff_mpeg12_mbAddrIncrTable[run][0]);
 339 }
 340
 341 static av_always_inline void put_qscale(MpegEncContext *s)
 342 {
 343     if (s->q_scale_type) {
 344         assert(s->qscale >= 1 && s->qscale <= 12);
 345         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
 346     } else {
 347         put_bits(&s->pb, 5, s->qscale);
 348     }
 349 }
 350
 351 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 352 {
 353     if (s->height > 2800) {
 354         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
 355         /* slice_vertical_position_extension */
 356         put_bits(&s->pb, 3, s->mb_y >> 7);
 357     } else {
 358         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 359     }
 360     put_qscale(s);
 361     /* slice extra information */
 362     put_bits(&s->pb, 1, 0);
 363 }
 364
 365 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 366 {
 367     AVFrameSideData *side_data;
 368     mpeg1_encode_sequence_header(s);
 369
 370     /* mpeg1 picture header */
 371     put_header(s, PICTURE_START_CODE);
 372     /* temporal reference */
 373
 374     // RAL: s->picture_number instead of s->fake_picture_number
 375     put_bits(&s->pb, 10,
 376              (s->picture_number - s->gop_picture_number) & 0x3ff);
 377     put_bits(&s->pb, 3, s->pict_type);
 378
 379     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 380     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 381
 382     // RAL: Forward f_code also needed for B-frames
 383     if (s->pict_type == AV_PICTURE_TYPE_P ||
 384         s->pict_type == AV_PICTURE_TYPE_B) {
 385         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 386         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 387             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
 388         else
 389             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 390     }
 391
 392     // RAL: Backward f_code necessary for B-frames
 393     if (s->pict_type == AV_PICTURE_TYPE_B) {
 394         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 395         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 396             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
 397         else
 398             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 399     }
 400
 401     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 402
 403     s->frame_pred_frame_dct = 1;
 404     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 405         put_header(s, EXT_START_CODE);
 406         put_bits(&s->pb, 4, 8);                 /* pic ext */
 407         if (s->pict_type == AV_PICTURE_TYPE_P ||
 408             s->pict_type == AV_PICTURE_TYPE_B) {
 409             put_bits(&s->pb, 4, s->f_code);
 410             put_bits(&s->pb, 4, s->f_code);
 411         } else {
 412             put_bits(&s->pb, 8, 255);
 413         }
 414         if (s->pict_type == AV_PICTURE_TYPE_B) {
 415             put_bits(&s->pb, 4, s->b_code);
 416             put_bits(&s->pb, 4, s->b_code);
 417         } else {
 418             put_bits(&s->pb, 8, 255);
 419         }
 420         put_bits(&s->pb, 2, s->intra_dc_precision);
 421
 422         assert(s->picture_structure == PICT_FRAME);
 423         put_bits(&s->pb, 2, s->picture_structure);
 424         if (s->progressive_sequence)
 425             put_bits(&s->pb, 1, 0);             /* no repeat */
 426         else
 427             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
 428         /* XXX: optimize the generation of this flag with entropy measures */
 429         s->frame_pred_frame_dct = s->progressive_sequence;
 430
 431         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
 432         put_bits(&s->pb, 1, s->concealment_motion_vectors);
 433         put_bits(&s->pb, 1, s->q_scale_type);
 434         put_bits(&s->pb, 1, s->intra_vlc_format);
 435         put_bits(&s->pb, 1, s->alternate_scan);
 436         put_bits(&s->pb, 1, s->repeat_first_field);
 437         s->progressive_frame = s->progressive_sequence;
 438         /* chroma_420_type */
 439         put_bits(&s->pb, 1, s->chroma_format ==
 440                             CHROMA_420 ? s->progressive_frame : 0);
 441         put_bits(&s->pb, 1, s->progressive_frame);
 442         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
 443     }
 444     if (s->scan_offset) {
 445         int i;
 446
 447         put_header(s, USER_START_CODE);
 448         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
 449             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
 450     }
 451     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 452                                        AV_FRAME_DATA_STEREO3D);
 453     if (side_data) {
 454         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 455         uint8_t fpa_type;
 456
 457         switch (stereo->type) {
 458         case AV_STEREO3D_SIDEBYSIDE:
 459             fpa_type = 0x03;
 460             break;
 461         case AV_STEREO3D_TOPBOTTOM:
 462             fpa_type = 0x04;
 463             break;
 464         case AV_STEREO3D_2D:
 465             fpa_type = 0x08;
 466             break;
 467         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 468             fpa_type = 0x23;
 469             break;
 470         default:
 471             fpa_type = 0;
 472             break;
 473         }
 474
 475         if (fpa_type != 0) {
 476             put_header(s, USER_START_CODE);
 477             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
 478             put_bits(&s->pb, 8, 'P');
 479             put_bits(&s->pb, 8, '3');
 480             put_bits(&s->pb, 8, 'D');
 481             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
 482
 483             put_bits(&s->pb, 1, 1);     // reserved_bit
 484             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
 485             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
 486             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
 487         }
 488     }
 489
 490     s->mb_y = 0;
 491     ff_mpeg1_encode_slice_header(s);
 492 }
 493
 494 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 495                                 int has_mv, int field_motion)
 496 {
 497     put_bits(&s->pb, n, bits);
 498     if (!s->frame_pred_frame_dct) {
 499         if (has_mv)
 500             /* motion_type: frame/field */
 501             put_bits(&s->pb, 2, 2 - field_motion);
 502         put_bits(&s->pb, 1, s->interlaced_dct);
 503     }
 504 }
 505
 506 // RAL: Parameter added: f_or_b_code
 507 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 508 {
 509     if (val == 0) {
 510         /* zero vector */
 511         put_bits(&s->pb,
 512                  ff_mpeg12_mbMotionVectorTable[0][1],
 513                  ff_mpeg12_mbMotionVectorTable[0][0]);
 514     } else {
 515         int code, sign, bits;
 516         int bit_size = f_or_b_code - 1;
 517         int range    = 1 << bit_size;
 518         /* modulo encoding */
 519         val = sign_extend(val, 5 + bit_size);
 520
 521         if (val >= 0) {
 522             val--;
 523             code = (val >> bit_size) + 1;
 524             bits = val & (range - 1);
 525             sign = 0;
 526         } else {
 527             val = -val;
 528             val--;
 529             code = (val >> bit_size) + 1;
 530             bits = val & (range - 1);
 531             sign = 1;
 532         }
 533
 534         assert(code > 0 && code <= 16);
 535
 536         put_bits(&s->pb,
 537                  ff_mpeg12_mbMotionVectorTable[code][1],
 538                  ff_mpeg12_mbMotionVectorTable[code][0]);
 539
 540         put_bits(&s->pb, 1, sign);
 541         if (bit_size > 0)
 542             put_bits(&s->pb, bit_size, bits);
 543     }
 544 }
 545
 546 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 547 {
 548     if (((unsigned) (diff + 255)) >= 511) {
 549         int index;
 550
 551         if (diff < 0) {
 552             index = av_log2_16bit(-2 * diff);
 553             diff--;
 554         } else {
 555             index = av_log2_16bit(2 * diff);
 556         }
 557         if (component == 0)
 558             put_bits(&s->pb,
 559                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 560                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 561                      (diff & ((1 << index) - 1)));
 562         else
 563             put_bits(&s->pb,
 564                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 565                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 566                      (diff & ((1 << index) - 1)));
 567     } else {
 568         if (component == 0)
 569             put_bits(&s->pb,
 570                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 571                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 572         else
 573             put_bits(&s->pb,
 574                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 575                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 576     }
 577 }
 578
 579 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 580 {
 581     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 582     int code, component;
 583     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 584
 585     last_index = s->block_last_index[n];
 586
 587     /* DC coef */
 588     if (s->mb_intra) {
 589         component = (n <= 3 ? 0 : (n & 1) + 1);
 590         dc        = block[0];                   /* overflow is impossible */
 591         diff      = dc - s->last_dc[component];
 592         encode_dc(s, diff, component);
 593         s->last_dc[component] = dc;
 594         i = 1;
 595         if (s->intra_vlc_format)
 596             table_vlc = ff_rl_mpeg2.table_vlc;
 597     } else {
 598         /* encode the first coefficient: needs to be done here because
 599          * it is handled slightly differently */
 600         level = block[0];
 601         if (abs(level) == 1) {
 602             code = ((uint32_t)level >> 31);     /* the sign bit */
 603             put_bits(&s->pb, 2, code | 0x02);
 604             i = 1;
 605         } else {
 606             i             = 0;
 607             last_non_zero = -1;
 608             goto next_coef;
 609         }
 610     }
 611
 612     /* now quantify & encode AC coefs */
 613     last_non_zero = i - 1;
 614
 615     for (; i <= last_index; i++) {
 616         j     = s->intra_scantable.permutated[i];
 617         level = block[j];
 618
 619 next_coef:
 620         /* encode using VLC */
 621         if (level != 0) {
 622             run = i - last_non_zero - 1;
 623
 624             alevel = level;
 625             MASK_ABS(sign, alevel);
 626             sign &= 1;
 627
 628             if (alevel <= mpeg1_max_level[0][run]) {
 629                 code = mpeg1_index_run[0][run] + alevel - 1;
 630                 /* store the VLC & sign at once */
 631                 put_bits(&s->pb, table_vlc[code][1] + 1,
 632                          (table_vlc[code][0] << 1) + sign);
 633             } else {
 634                 /* escape seems to be pretty rare <5% so I do not optimize it */
 635                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 636                 /* escape: only clip in this case */
 637                 put_bits(&s->pb, 6, run);
 638                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 639                     if (alevel < 128) {
 640                         put_sbits(&s->pb, 8, level);
 641                     } else {
 642                         if (level < 0)
 643                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 644                         else
 645                             put_sbits(&s->pb, 16, level);
 646                     }
 647                 } else {
 648                     put_sbits(&s->pb, 12, level);
 649                 }
 650             }
 651             last_non_zero = i;
 652         }
 653     }
 654     /* end of block */
 655     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 656 }
 657
 658 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 659                                                       int16_t block[6][64],
 660                                                       int motion_x, int motion_y,
 661                                                       int mb_block_count)
 662 {
 663     int i, cbp;
 664     const int mb_x     = s->mb_x;
 665     const int mb_y     = s->mb_y;
 666     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 667
 668     /* compute cbp */
 669     cbp = 0;
 670     for (i = 0; i < mb_block_count; i++)
 671         if (s->block_last_index[i] >= 0)
 672             cbp |= 1 << (mb_block_count - 1 - i);
 673
 674     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 675         (mb_x != s->mb_width - 1 ||
 676          (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 677         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 678          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 679           (((s->mv_dir & MV_DIR_FORWARD)
 680             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 681                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 682            ((s->mv_dir & MV_DIR_BACKWARD)
 683             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 684                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 685         s->mb_skip_run++;
 686         s->qscale -= s->dquant;
 687         s->skip_count++;
 688         s->misc_bits++;
 689         s->last_bits++;
 690         if (s->pict_type == AV_PICTURE_TYPE_P) {
 691             s->last_mv[0][0][0] =
 692             s->last_mv[0][0][1] =
 693             s->last_mv[0][1][0] =
 694             s->last_mv[0][1][1] = 0;
 695         }
 696     } else {
 697         if (first_mb) {
 698             assert(s->mb_skip_run == 0);
 699             encode_mb_skip_run(s, s->mb_x);
 700         } else {
 701             encode_mb_skip_run(s, s->mb_skip_run);
 702         }
 703
 704         if (s->pict_type == AV_PICTURE_TYPE_I) {
 705             if (s->dquant && cbp) {
 706                 /* macroblock_type: macroblock_quant = 1 */
 707                 put_mb_modes(s, 2, 1, 0, 0);
 708                 put_qscale(s);
 709             } else {
 710                 /* macroblock_type: macroblock_quant = 0 */
 711                 put_mb_modes(s, 1, 1, 0, 0);
 712                 s->qscale -= s->dquant;
 713             }
 714             s->misc_bits += get_bits_diff(s);
 715             s->i_count++;
 716         } else if (s->mb_intra) {
 717             if (s->dquant && cbp) {
 718                 put_mb_modes(s, 6, 0x01, 0, 0);
 719                 put_qscale(s);
 720             } else {
 721                 put_mb_modes(s, 5, 0x03, 0, 0);
 722                 s->qscale -= s->dquant;
 723             }
 724             s->misc_bits += get_bits_diff(s);
 725             s->i_count++;
 726             memset(s->last_mv, 0, sizeof(s->last_mv));
 727         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 728             if (s->mv_type == MV_TYPE_16X16) {
 729                 if (cbp != 0) {
 730                     if ((motion_x | motion_y) == 0) {
 731                         if (s->dquant) {
 732                             /* macroblock_pattern & quant */
 733                             put_mb_modes(s, 5, 1, 0, 0);
 734                             put_qscale(s);
 735                         } else {
 736                             /* macroblock_pattern only */
 737                             put_mb_modes(s, 2, 1, 0, 0);
 738                         }
 739                         s->misc_bits += get_bits_diff(s);
 740                     } else {
 741                         if (s->dquant) {
 742                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 743                             put_qscale(s);
 744                         } else {
 745                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 746                         }
 747                         s->misc_bits += get_bits_diff(s);
 748                         // RAL: f_code parameter added
 749                         mpeg1_encode_motion(s,
 750                                             motion_x - s->last_mv[0][0][0],
 751                                             s->f_code);
 752                         // RAL: f_code parameter added
 753                         mpeg1_encode_motion(s,
 754                                             motion_y - s->last_mv[0][0][1],
 755                                             s->f_code);
 756                         s->mv_bits += get_bits_diff(s);
 757                     }
 758                 } else {
 759                     put_bits(&s->pb, 3, 1);         /* motion only */
 760                     if (!s->frame_pred_frame_dct)
 761                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 762                     s->misc_bits += get_bits_diff(s);
 763                     // RAL: f_code parameter added
 764                     mpeg1_encode_motion(s,
 765                                         motion_x - s->last_mv[0][0][0],
 766                                         s->f_code);
 767                     // RAL: f_code parameter added
 768                     mpeg1_encode_motion(s,
 769                                         motion_y - s->last_mv[0][0][1],
 770                                         s->f_code);
 771                     s->qscale  -= s->dquant;
 772                     s->mv_bits += get_bits_diff(s);
 773                 }
 774                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 775                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 776             } else {
 777                 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 778
 779                 if (cbp) {
 780                     if (s->dquant) {
 781                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 782                         put_qscale(s);
 783                     } else {
 784                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 785                     }
 786                 } else {
 787                     put_bits(&s->pb, 3, 1);             /* motion only */
 788                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 789                     s->qscale -= s->dquant;
 790                 }
 791                 s->misc_bits += get_bits_diff(s);
 792                 for (i = 0; i < 2; i++) {
 793                     put_bits(&s->pb, 1, s->field_select[0][i]);
 794                     mpeg1_encode_motion(s,
 795                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 796                                         s->f_code);
 797                     mpeg1_encode_motion(s,
 798                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 799                                         s->f_code);
 800                     s->last_mv[0][i][0] = s->mv[0][i][0];
 801                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 802                 }
 803                 s->mv_bits += get_bits_diff(s);
 804             }
 805             if (cbp) {
 806                 if (s->chroma_y_shift) {
 807                     put_bits(&s->pb,
 808                              ff_mpeg12_mbPatTable[cbp][1],
 809                              ff_mpeg12_mbPatTable[cbp][0]);
 810                 } else {
 811                     put_bits(&s->pb,
 812                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 813                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 814                     put_sbits(&s->pb, 2, cbp);
 815                 }
 816             }
 817             s->f_count++;
 818         } else {
 819             if (s->mv_type == MV_TYPE_16X16) {
 820                 if (cbp) {                      // With coded bloc pattern
 821                     if (s->dquant) {
 822                         if (s->mv_dir == MV_DIR_FORWARD)
 823                             put_mb_modes(s, 6, 3, 1, 0);
 824                         else
 825                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 826                         put_qscale(s);
 827                     } else {
 828                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 829                     }
 830                 } else {                        // No coded bloc pattern
 831                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 832                     if (!s->frame_pred_frame_dct)
 833                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 834                     s->qscale -= s->dquant;
 835                 }
 836                 s->misc_bits += get_bits_diff(s);
 837                 if (s->mv_dir & MV_DIR_FORWARD) {
 838                     mpeg1_encode_motion(s,
 839                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 840                                         s->f_code);
 841                     mpeg1_encode_motion(s,
 842                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 843                                         s->f_code);
 844                     s->last_mv[0][0][0] =
 845                     s->last_mv[0][1][0] = s->mv[0][0][0];
 846                     s->last_mv[0][0][1] =
 847                     s->last_mv[0][1][1] = s->mv[0][0][1];
 848                     s->f_count++;
 849                 }
 850                 if (s->mv_dir & MV_DIR_BACKWARD) {
 851                     mpeg1_encode_motion(s,
 852                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 853                                         s->b_code);
 854                     mpeg1_encode_motion(s,
 855                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 856                                         s->b_code);
 857                     s->last_mv[1][0][0] =
 858                     s->last_mv[1][1][0] = s->mv[1][0][0];
 859                     s->last_mv[1][0][1] =
 860                     s->last_mv[1][1][1] = s->mv[1][0][1];
 861                     s->b_count++;
 862                 }
 863             } else {
 864                 assert(s->mv_type == MV_TYPE_FIELD);
 865                 assert(!s->frame_pred_frame_dct);
 866                 if (cbp) {                      // With coded bloc pattern
 867                     if (s->dquant) {
 868                         if (s->mv_dir == MV_DIR_FORWARD)
 869                             put_mb_modes(s, 6, 3, 1, 1);
 870                         else
 871                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 872                         put_qscale(s);
 873                     } else {
 874                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 875                     }
 876                 } else {                        // No coded bloc pattern
 877                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 878                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 879                     s->qscale -= s->dquant;
 880                 }
 881                 s->misc_bits += get_bits_diff(s);
 882                 if (s->mv_dir & MV_DIR_FORWARD) {
 883                     for (i = 0; i < 2; i++) {
 884                         put_bits(&s->pb, 1, s->field_select[0][i]);
 885                         mpeg1_encode_motion(s,
 886                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 887                                             s->f_code);
 888                         mpeg1_encode_motion(s,
 889                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 890                                             s->f_code);
 891                         s->last_mv[0][i][0] = s->mv[0][i][0];
 892                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 893                     }
 894                     s->f_count++;
 895                 }
 896                 if (s->mv_dir & MV_DIR_BACKWARD) {
 897                     for (i = 0; i < 2; i++) {
 898                         put_bits(&s->pb, 1, s->field_select[1][i]);
 899                         mpeg1_encode_motion(s,
 900                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 901                                             s->b_code);
 902                         mpeg1_encode_motion(s,
 903                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 904                                             s->b_code);
 905                         s->last_mv[1][i][0] = s->mv[1][i][0];
 906                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 907                     }
 908                     s->b_count++;
 909                 }
 910             }
 911             s->mv_bits += get_bits_diff(s);
 912             if (cbp) {
 913                 if (s->chroma_y_shift) {
 914                     put_bits(&s->pb,
 915                              ff_mpeg12_mbPatTable[cbp][1],
 916                              ff_mpeg12_mbPatTable[cbp][0]);
 917                 } else {
 918                     put_bits(&s->pb,
 919                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 920                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 921                     put_sbits(&s->pb, 2, cbp);
 922                 }
 923             }
 924         }
 925         for (i = 0; i < mb_block_count; i++)
 926             if (cbp & (1 << (mb_block_count - 1 - i)))
 927                 mpeg1_encode_block(s, block[i], i);
 928         s->mb_skip_run = 0;
 929         if (s->mb_intra)
 930             s->i_tex_bits += get_bits_diff(s);
 931         else
 932             s->p_tex_bits += get_bits_diff(s);
 933     }
 934 }
 935
 936 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
 937                         int motion_x, int motion_y)
 938 {
 939     if (s->chroma_format == CHROMA_420)
 940         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
 941     else
 942         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
 943 }
 944
 945 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
 946 {
 947     static int done = 0;
 948
 949     ff_mpeg12_common_init(s);
 950
 951     if (!done) {
 952         int f_code;
 953         int mv;
 954         int i;
 955
 956         done = 1;
 957         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
 958         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
 959
 960         for (i = 0; i < 64; i++) {
 961             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
 962             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
 963         }
 964
 965         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
 966         if (s->intra_vlc_format)
 967             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
 968
 969         /* build unified dc encoding tables */
 970         for (i = -255; i < 256; i++) {
 971             int adiff, index;
 972             int bits, code;
 973             int diff = i;
 974
 975             adiff = FFABS(diff);
 976             if (diff < 0)
 977                 diff--;
 978             index = av_log2(2 * adiff);
 979
 980             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
 981             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 982                    (diff & ((1 << index) - 1));
 983             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
 984
 985             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
 986             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 987                    (diff & ((1 << index) - 1));
 988             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
 989         }
 990
 991         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
 992             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
 993                 int len;
 994
 995                 if (mv == 0) {
 996                     len = ff_mpeg12_mbMotionVectorTable[0][1];
 997                 } else {
 998                     int val, bit_size, code;
 999
1000                     bit_size = f_code - 1;
1001
1002                     val = mv;
1003                     if (val < 0)
1004                         val = -val;
1005                     val--;
1006                     code = (val >> bit_size) + 1;
1007                     if (code < 17)
1008                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1009                               1 + bit_size;
1010                     else
1011                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1012                               2 + bit_size;
1013                 }
1014
1015                 mv_penalty[f_code][mv + MAX_MV] = len;
1016             }
1017
1018
1019         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1020             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1021                 fcode_tab[mv + MAX_MV] = f_code;
1022     }
1023     s->me.mv_penalty = mv_penalty;
1024     s->fcode_tab     = fcode_tab;
1025     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1026         s->min_qcoeff = -255;
1027         s->max_qcoeff = 255;
1028     } else {
1029         s->min_qcoeff = -2047;
1030         s->max_qcoeff = 2047;
1031     }
1032     if (s->intra_vlc_format) {
1033         s->intra_ac_vlc_length      =
1034         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1035     } else {
1036         s->intra_ac_vlc_length      =
1037         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1038     }
1039     s->inter_ac_vlc_length      =
1040     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1041 }
1042
1043 #define OFFSET(x) offsetof(MpegEncContext, x)
1044 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1045 #define COMMON_OPTS                                                           \
1046     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1047       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1048     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1049       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1050     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1051       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1052
1053 static const AVOption mpeg1_options[] = {
1054     COMMON_OPTS
1055     FF_MPV_COMMON_OPTS
1056     { NULL },
1057 };
1058
1059 static const AVOption mpeg2_options[] = {
1060     COMMON_OPTS
1061     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1062     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1063     FF_MPV_COMMON_OPTS
1064     { NULL },
1065 };
1066
1067 #define mpeg12_class(x)                                 \
1068 static const AVClass mpeg ## x ## _class = {            \
1069     .class_name = "mpeg" # x "video encoder",           \
1070     .item_name  = av_default_item_name,                 \
1071     .option     = mpeg ## x ## _options,                \
1072     .version    = LIBAVUTIL_VERSION_INT,                \
1073 };
1074
1075 mpeg12_class(1)
1076 mpeg12_class(2)
1077
1078 AVCodec ff_mpeg1video_encoder = {
1079     .name                 = "mpeg1video",
1080     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1081     .type                 = AVMEDIA_TYPE_VIDEO,
1082     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1083     .priv_data_size       = sizeof(MpegEncContext),
1084     .init                 = encode_init,
1085     .encode2              = ff_mpv_encode_picture,
1086     .close                = ff_mpv_encode_end,
1087     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1088     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1089                                                            AV_PIX_FMT_NONE },
1090     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1091     .priv_class           = &mpeg1_class,
1092 };
1093
1094 AVCodec ff_mpeg2video_encoder = {
1095     .name                 = "mpeg2video",
1096     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1097     .type                 = AVMEDIA_TYPE_VIDEO,
1098     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1099     .priv_data_size       = sizeof(MpegEncContext),
1100     .init                 = encode_init,
1101     .encode2              = ff_mpv_encode_picture,
1102     .close                = ff_mpv_encode_end,
1103     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1104     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1105                                                            AV_PIX_FMT_YUV422P,
1106                                                            AV_PIX_FMT_NONE },
1107     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1108     .priv_class           = &mpeg2_class,
1109 };