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 "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, "MPEG1/2 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                    "MPEG1/2 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     return 0;
 186 }
 187
 188 static void put_header(MpegEncContext *s, int header)
 189 {
 190     avpriv_align_put_bits(&s->pb);
 191     put_bits(&s->pb, 16, header >> 16);
 192     put_sbits(&s->pb, 16, header);
 193 }
 194
 195 /* put sequence header if needed */
 196 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 197 {
 198     unsigned int vbv_buffer_size, fps, v;
 199     int i, constraint_parameter_flag;
 200     uint64_t time_code;
 201     float best_aspect_error = 1E10;
 202     float aspect_ratio      = av_q2d(s->avctx->sample_aspect_ratio);
 203
 204     if (aspect_ratio == 0.0)
 205         aspect_ratio = 1.0;             // pixel aspect 1.1 (VGA)
 206
 207     if (s->current_picture.f->key_frame) {
 208         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 209
 210         /* mpeg1 header repeated every gop */
 211         put_header(s, SEQ_START_CODE);
 212
 213         put_sbits(&s->pb, 12, s->width);
 214         put_sbits(&s->pb, 12, s->height);
 215
 216         for (i = 1; i < 15; i++) {
 217             float error = aspect_ratio;
 218             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
 219                 error -= 1.0 / ff_mpeg1_aspect[i];
 220             else
 221                 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
 222
 223             error = FFABS(error);
 224
 225             if (error < best_aspect_error) {
 226                 best_aspect_error    = error;
 227                 s->aspect_ratio_info = i;
 228             }
 229         }
 230
 231         put_bits(&s->pb, 4, s->aspect_ratio_info);
 232         put_bits(&s->pb, 4, s->frame_rate_index);
 233
 234         if (s->avctx->rc_max_rate) {
 235             v = (s->avctx->rc_max_rate + 399) / 400;
 236             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 237                 v = 0x3ffff;
 238         } else {
 239             v = 0x3FFFF;
 240         }
 241
 242         if (s->avctx->rc_buffer_size)
 243             vbv_buffer_size = s->avctx->rc_buffer_size;
 244         else
 245             /* VBV calculation: Scaled so that a VCD has the proper
 246              * VBV size of 40 kilobytes */
 247             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
 248         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
 249
 250         put_sbits(&s->pb, 18, v);
 251         put_bits(&s->pb, 1, 1);         // marker
 252         put_sbits(&s->pb, 10, vbv_buffer_size);
 253
 254         constraint_parameter_flag =
 255             s->width  <= 768                                    &&
 256             s->height <= 576                                    &&
 257             s->mb_width * s->mb_height                 <= 396   &&
 258             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
 259             framerate.num <= framerate.den * 30                 &&
 260             s->avctx->me_range                                  &&
 261             s->avctx->me_range < 128                            &&
 262             vbv_buffer_size <= 20                               &&
 263             v <= 1856000 / 400                                  &&
 264             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
 265
 266         put_bits(&s->pb, 1, constraint_parameter_flag);
 267
 268         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 269         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 270
 271         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 272             put_header(s, EXT_START_CODE);
 273             put_bits(&s->pb, 4, 1);                 // seq ext
 274
 275             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
 276
 277             put_bits(&s->pb, 3, s->avctx->profile); // profile
 278             put_bits(&s->pb, 4, s->avctx->level);   // level
 279
 280             put_bits(&s->pb, 1, s->progressive_sequence);
 281             put_bits(&s->pb, 2, s->chroma_format);
 282             put_bits(&s->pb, 2, s->width  >> 12);
 283             put_bits(&s->pb, 2, s->height >> 12);
 284             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
 285             put_bits(&s->pb, 1, 1);                 // marker
 286             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
 287             put_bits(&s->pb, 1, s->low_delay);
 288             put_bits(&s->pb, 2, 0);                 // frame_rate_ext_n
 289             put_bits(&s->pb, 5, 0);                 // frame_rate_ext_d
 290
 291             put_header(s, EXT_START_CODE);
 292             put_bits(&s->pb, 4, 2);                         // sequence display extension
 293             put_bits(&s->pb, 3, 0);                         // video_format: 0 is components
 294             put_bits(&s->pb, 1, 1);                         // colour_description
 295             put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
 296             put_bits(&s->pb, 8, s->avctx->color_trc);       // transfer_characteristics
 297             put_bits(&s->pb, 8, s->avctx->colorspace);      // matrix_coefficients
 298             put_bits(&s->pb, 14, s->width);                 // display_horizontal_size
 299             put_bits(&s->pb, 1, 1);                         // marker_bit
 300             put_bits(&s->pb, 14, s->height);                // display_vertical_size
 301             put_bits(&s->pb, 3, 0);                         // remaining 3 bits are zero padding
 302         }
 303
 304         put_header(s, GOP_START_CODE);
 305         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
 306         /* time code: we must convert from the real frame rate to a
 307          * fake MPEG frame rate in case of low frame rate */
 308         fps       = (framerate.num + framerate.den / 2) / framerate.den;
 309         time_code = s->current_picture_ptr->f->coded_picture_number +
 310                     s->avctx->timecode_frame_start;
 311
 312         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
 313         if (s->drop_frame_timecode) {
 314             /* only works for NTSC 29.97 */
 315             int d = time_code / 17982;
 316             int m = time_code % 17982;
 317             /* not needed since -2,-1 / 1798 in C returns 0 */
 318             // if (m < 2)
 319             //     m += 2;
 320             time_code += 18 * d + 2 * ((m - 2) / 1798);
 321         }
 322         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
 323         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
 324         put_bits(&s->pb, 1, 1);
 325         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
 326         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
 327         put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
 328         put_bits(&s->pb, 1, 0);                     // broken link
 329     }
 330 }
 331
 332 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 333 {
 334     while (run >= 33) {
 335         put_bits(&s->pb, 11, 0x008);
 336         run -= 33;
 337     }
 338     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 339              ff_mpeg12_mbAddrIncrTable[run][0]);
 340 }
 341
 342 static av_always_inline void put_qscale(MpegEncContext *s)
 343 {
 344     if (s->q_scale_type) {
 345         assert(s->qscale >= 1 && s->qscale <= 12);
 346         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
 347     } else {
 348         put_bits(&s->pb, 5, s->qscale);
 349     }
 350 }
 351
 352 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 353 {
 354     if (s->height > 2800) {
 355         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
 356         /* slice_vertical_position_extension */
 357         put_bits(&s->pb, 3, s->mb_y >> 7);
 358     } else {
 359         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 360     }
 361     put_qscale(s);
 362     /* slice extra information */
 363     put_bits(&s->pb, 1, 0);
 364 }
 365
 366 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 367 {
 368     AVFrameSideData *side_data;
 369     mpeg1_encode_sequence_header(s);
 370
 371     /* mpeg1 picture header */
 372     put_header(s, PICTURE_START_CODE);
 373     /* temporal reference */
 374
 375     // RAL: s->picture_number instead of s->fake_picture_number
 376     put_bits(&s->pb, 10,
 377              (s->picture_number - s->gop_picture_number) & 0x3ff);
 378     put_bits(&s->pb, 3, s->pict_type);
 379
 380     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 381     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 382
 383     // RAL: Forward f_code also needed for B-frames
 384     if (s->pict_type == AV_PICTURE_TYPE_P ||
 385         s->pict_type == AV_PICTURE_TYPE_B) {
 386         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 387         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 388             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
 389         else
 390             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 391     }
 392
 393     // RAL: Backward f_code necessary for B-frames
 394     if (s->pict_type == AV_PICTURE_TYPE_B) {
 395         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 396         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 397             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
 398         else
 399             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 400     }
 401
 402     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 403
 404     s->frame_pred_frame_dct = 1;
 405     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 406         put_header(s, EXT_START_CODE);
 407         put_bits(&s->pb, 4, 8);                 /* pic ext */
 408         if (s->pict_type == AV_PICTURE_TYPE_P ||
 409             s->pict_type == AV_PICTURE_TYPE_B) {
 410             put_bits(&s->pb, 4, s->f_code);
 411             put_bits(&s->pb, 4, s->f_code);
 412         } else {
 413             put_bits(&s->pb, 8, 255);
 414         }
 415         if (s->pict_type == AV_PICTURE_TYPE_B) {
 416             put_bits(&s->pb, 4, s->b_code);
 417             put_bits(&s->pb, 4, s->b_code);
 418         } else {
 419             put_bits(&s->pb, 8, 255);
 420         }
 421         put_bits(&s->pb, 2, s->intra_dc_precision);
 422
 423         assert(s->picture_structure == PICT_FRAME);
 424         put_bits(&s->pb, 2, s->picture_structure);
 425         if (s->progressive_sequence)
 426             put_bits(&s->pb, 1, 0);             /* no repeat */
 427         else
 428             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
 429         /* XXX: optimize the generation of this flag with entropy measures */
 430         s->frame_pred_frame_dct = s->progressive_sequence;
 431
 432         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
 433         put_bits(&s->pb, 1, s->concealment_motion_vectors);
 434         put_bits(&s->pb, 1, s->q_scale_type);
 435         put_bits(&s->pb, 1, s->intra_vlc_format);
 436         put_bits(&s->pb, 1, s->alternate_scan);
 437         put_bits(&s->pb, 1, s->repeat_first_field);
 438         s->progressive_frame = s->progressive_sequence;
 439         /* chroma_420_type */
 440         put_bits(&s->pb, 1, s->chroma_format ==
 441                             CHROMA_420 ? s->progressive_frame : 0);
 442         put_bits(&s->pb, 1, s->progressive_frame);
 443         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
 444     }
 445     if (s->scan_offset) {
 446         int i;
 447
 448         put_header(s, USER_START_CODE);
 449         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
 450             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
 451     }
 452     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 453                                        AV_FRAME_DATA_STEREO3D);
 454     if (side_data) {
 455         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 456         uint8_t fpa_type;
 457
 458         switch (stereo->type) {
 459         case AV_STEREO3D_SIDEBYSIDE:
 460             fpa_type = 0x03;
 461             break;
 462         case AV_STEREO3D_TOPBOTTOM:
 463             fpa_type = 0x04;
 464             break;
 465         case AV_STEREO3D_2D:
 466             fpa_type = 0x08;
 467             break;
 468         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 469             fpa_type = 0x23;
 470             break;
 471         default:
 472             fpa_type = 0;
 473             break;
 474         }
 475
 476         if (fpa_type != 0) {
 477             put_header(s, USER_START_CODE);
 478             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
 479             put_bits(&s->pb, 8, 'P');
 480             put_bits(&s->pb, 8, '3');
 481             put_bits(&s->pb, 8, 'D');
 482             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
 483
 484             put_bits(&s->pb, 1, 1);     // reserved_bit
 485             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
 486             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
 487             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
 488         }
 489     }
 490
 491     s->mb_y = 0;
 492     ff_mpeg1_encode_slice_header(s);
 493 }
 494
 495 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 496                                 int has_mv, int field_motion)
 497 {
 498     put_bits(&s->pb, n, bits);
 499     if (!s->frame_pred_frame_dct) {
 500         if (has_mv)
 501             /* motion_type: frame/field */
 502             put_bits(&s->pb, 2, 2 - field_motion);
 503         put_bits(&s->pb, 1, s->interlaced_dct);
 504     }
 505 }
 506
 507 // RAL: Parameter added: f_or_b_code
 508 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 509 {
 510     if (val == 0) {
 511         /* zero vector */
 512         put_bits(&s->pb,
 513                  ff_mpeg12_mbMotionVectorTable[0][1],
 514                  ff_mpeg12_mbMotionVectorTable[0][0]);
 515     } else {
 516         int code, sign, bits;
 517         int bit_size = f_or_b_code - 1;
 518         int range    = 1 << bit_size;
 519         /* modulo encoding */
 520         val = sign_extend(val, 5 + bit_size);
 521
 522         if (val >= 0) {
 523             val--;
 524             code = (val >> bit_size) + 1;
 525             bits = val & (range - 1);
 526             sign = 0;
 527         } else {
 528             val = -val;
 529             val--;
 530             code = (val >> bit_size) + 1;
 531             bits = val & (range - 1);
 532             sign = 1;
 533         }
 534
 535         assert(code > 0 && code <= 16);
 536
 537         put_bits(&s->pb,
 538                  ff_mpeg12_mbMotionVectorTable[code][1],
 539                  ff_mpeg12_mbMotionVectorTable[code][0]);
 540
 541         put_bits(&s->pb, 1, sign);
 542         if (bit_size > 0)
 543             put_bits(&s->pb, bit_size, bits);
 544     }
 545 }
 546
 547 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 548 {
 549     if (((unsigned) (diff + 255)) >= 511) {
 550         int index;
 551
 552         if (diff < 0) {
 553             index = av_log2_16bit(-2 * diff);
 554             diff--;
 555         } else {
 556             index = av_log2_16bit(2 * diff);
 557         }
 558         if (component == 0)
 559             put_bits(&s->pb,
 560                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 561                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 562                      (diff & ((1 << index) - 1)));
 563         else
 564             put_bits(&s->pb,
 565                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 566                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 567                      (diff & ((1 << index) - 1)));
 568     } else {
 569         if (component == 0)
 570             put_bits(&s->pb,
 571                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 572                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 573         else
 574             put_bits(&s->pb,
 575                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 576                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 577     }
 578 }
 579
 580 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 581 {
 582     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 583     int code, component;
 584     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 585
 586     last_index = s->block_last_index[n];
 587
 588     /* DC coef */
 589     if (s->mb_intra) {
 590         component = (n <= 3 ? 0 : (n & 1) + 1);
 591         dc        = block[0];                   /* overflow is impossible */
 592         diff      = dc - s->last_dc[component];
 593         encode_dc(s, diff, component);
 594         s->last_dc[component] = dc;
 595         i = 1;
 596         if (s->intra_vlc_format)
 597             table_vlc = ff_rl_mpeg2.table_vlc;
 598     } else {
 599         /* encode the first coefficient: needs to be done here because
 600          * it is handled slightly differently */
 601         level = block[0];
 602         if (abs(level) == 1) {
 603             code = ((uint32_t)level >> 31);     /* the sign bit */
 604             put_bits(&s->pb, 2, code | 0x02);
 605             i = 1;
 606         } else {
 607             i             = 0;
 608             last_non_zero = -1;
 609             goto next_coef;
 610         }
 611     }
 612
 613     /* now quantify & encode AC coefs */
 614     last_non_zero = i - 1;
 615
 616     for (; i <= last_index; i++) {
 617         j     = s->intra_scantable.permutated[i];
 618         level = block[j];
 619
 620 next_coef:
 621         /* encode using VLC */
 622         if (level != 0) {
 623             run = i - last_non_zero - 1;
 624
 625             alevel = level;
 626             MASK_ABS(sign, alevel);
 627             sign &= 1;
 628
 629             if (alevel <= mpeg1_max_level[0][run]) {
 630                 code = mpeg1_index_run[0][run] + alevel - 1;
 631                 /* store the VLC & sign at once */
 632                 put_bits(&s->pb, table_vlc[code][1] + 1,
 633                          (table_vlc[code][0] << 1) + sign);
 634             } else {
 635                 /* escape seems to be pretty rare <5% so I do not optimize it */
 636                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 637                 /* escape: only clip in this case */
 638                 put_bits(&s->pb, 6, run);
 639                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 640                     if (alevel < 128) {
 641                         put_sbits(&s->pb, 8, level);
 642                     } else {
 643                         if (level < 0)
 644                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 645                         else
 646                             put_sbits(&s->pb, 16, level);
 647                     }
 648                 } else {
 649                     put_sbits(&s->pb, 12, level);
 650                 }
 651             }
 652             last_non_zero = i;
 653         }
 654     }
 655     /* end of block */
 656     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 657 }
 658
 659 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 660                                                       int16_t block[6][64],
 661                                                       int motion_x, int motion_y,
 662                                                       int mb_block_count)
 663 {
 664     int i, cbp;
 665     const int mb_x     = s->mb_x;
 666     const int mb_y     = s->mb_y;
 667     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 668
 669     /* compute cbp */
 670     cbp = 0;
 671     for (i = 0; i < mb_block_count; i++)
 672         if (s->block_last_index[i] >= 0)
 673             cbp |= 1 << (mb_block_count - 1 - i);
 674
 675     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 676         (mb_x != s->mb_width - 1 ||
 677          (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 678         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 679          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 680           (((s->mv_dir & MV_DIR_FORWARD)
 681             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 682                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 683            ((s->mv_dir & MV_DIR_BACKWARD)
 684             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 685                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 686         s->mb_skip_run++;
 687         s->qscale -= s->dquant;
 688         s->skip_count++;
 689         s->misc_bits++;
 690         s->last_bits++;
 691         if (s->pict_type == AV_PICTURE_TYPE_P) {
 692             s->last_mv[0][0][0] =
 693             s->last_mv[0][0][1] =
 694             s->last_mv[0][1][0] =
 695             s->last_mv[0][1][1] = 0;
 696         }
 697     } else {
 698         if (first_mb) {
 699             assert(s->mb_skip_run == 0);
 700             encode_mb_skip_run(s, s->mb_x);
 701         } else {
 702             encode_mb_skip_run(s, s->mb_skip_run);
 703         }
 704
 705         if (s->pict_type == AV_PICTURE_TYPE_I) {
 706             if (s->dquant && cbp) {
 707                 /* macroblock_type: macroblock_quant = 1 */
 708                 put_mb_modes(s, 2, 1, 0, 0);
 709                 put_qscale(s);
 710             } else {
 711                 /* macroblock_type: macroblock_quant = 0 */
 712                 put_mb_modes(s, 1, 1, 0, 0);
 713                 s->qscale -= s->dquant;
 714             }
 715             s->misc_bits += get_bits_diff(s);
 716             s->i_count++;
 717         } else if (s->mb_intra) {
 718             if (s->dquant && cbp) {
 719                 put_mb_modes(s, 6, 0x01, 0, 0);
 720                 put_qscale(s);
 721             } else {
 722                 put_mb_modes(s, 5, 0x03, 0, 0);
 723                 s->qscale -= s->dquant;
 724             }
 725             s->misc_bits += get_bits_diff(s);
 726             s->i_count++;
 727             memset(s->last_mv, 0, sizeof(s->last_mv));
 728         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 729             if (s->mv_type == MV_TYPE_16X16) {
 730                 if (cbp != 0) {
 731                     if ((motion_x | motion_y) == 0) {
 732                         if (s->dquant) {
 733                             /* macroblock_pattern & quant */
 734                             put_mb_modes(s, 5, 1, 0, 0);
 735                             put_qscale(s);
 736                         } else {
 737                             /* macroblock_pattern only */
 738                             put_mb_modes(s, 2, 1, 0, 0);
 739                         }
 740                         s->misc_bits += get_bits_diff(s);
 741                     } else {
 742                         if (s->dquant) {
 743                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 744                             put_qscale(s);
 745                         } else {
 746                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 747                         }
 748                         s->misc_bits += get_bits_diff(s);
 749                         // RAL: f_code parameter added
 750                         mpeg1_encode_motion(s,
 751                                             motion_x - s->last_mv[0][0][0],
 752                                             s->f_code);
 753                         // RAL: f_code parameter added
 754                         mpeg1_encode_motion(s,
 755                                             motion_y - s->last_mv[0][0][1],
 756                                             s->f_code);
 757                         s->mv_bits += get_bits_diff(s);
 758                     }
 759                 } else {
 760                     put_bits(&s->pb, 3, 1);         /* motion only */
 761                     if (!s->frame_pred_frame_dct)
 762                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 763                     s->misc_bits += get_bits_diff(s);
 764                     // RAL: f_code parameter added
 765                     mpeg1_encode_motion(s,
 766                                         motion_x - s->last_mv[0][0][0],
 767                                         s->f_code);
 768                     // RAL: f_code parameter added
 769                     mpeg1_encode_motion(s,
 770                                         motion_y - s->last_mv[0][0][1],
 771                                         s->f_code);
 772                     s->qscale  -= s->dquant;
 773                     s->mv_bits += get_bits_diff(s);
 774                 }
 775                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 776                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 777             } else {
 778                 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 779
 780                 if (cbp) {
 781                     if (s->dquant) {
 782                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 783                         put_qscale(s);
 784                     } else {
 785                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 786                     }
 787                 } else {
 788                     put_bits(&s->pb, 3, 1);             /* motion only */
 789                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 790                     s->qscale -= s->dquant;
 791                 }
 792                 s->misc_bits += get_bits_diff(s);
 793                 for (i = 0; i < 2; i++) {
 794                     put_bits(&s->pb, 1, s->field_select[0][i]);
 795                     mpeg1_encode_motion(s,
 796                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 797                                         s->f_code);
 798                     mpeg1_encode_motion(s,
 799                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 800                                         s->f_code);
 801                     s->last_mv[0][i][0] = s->mv[0][i][0];
 802                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 803                 }
 804                 s->mv_bits += get_bits_diff(s);
 805             }
 806             if (cbp) {
 807                 if (s->chroma_y_shift) {
 808                     put_bits(&s->pb,
 809                              ff_mpeg12_mbPatTable[cbp][1],
 810                              ff_mpeg12_mbPatTable[cbp][0]);
 811                 } else {
 812                     put_bits(&s->pb,
 813                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 814                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 815                     put_sbits(&s->pb, 2, cbp);
 816                 }
 817             }
 818             s->f_count++;
 819         } else {
 820             if (s->mv_type == MV_TYPE_16X16) {
 821                 if (cbp) {                      // With coded bloc pattern
 822                     if (s->dquant) {
 823                         if (s->mv_dir == MV_DIR_FORWARD)
 824                             put_mb_modes(s, 6, 3, 1, 0);
 825                         else
 826                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 827                         put_qscale(s);
 828                     } else {
 829                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 830                     }
 831                 } else {                        // No coded bloc pattern
 832                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 833                     if (!s->frame_pred_frame_dct)
 834                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 835                     s->qscale -= s->dquant;
 836                 }
 837                 s->misc_bits += get_bits_diff(s);
 838                 if (s->mv_dir & MV_DIR_FORWARD) {
 839                     mpeg1_encode_motion(s,
 840                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 841                                         s->f_code);
 842                     mpeg1_encode_motion(s,
 843                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 844                                         s->f_code);
 845                     s->last_mv[0][0][0] =
 846                     s->last_mv[0][1][0] = s->mv[0][0][0];
 847                     s->last_mv[0][0][1] =
 848                     s->last_mv[0][1][1] = s->mv[0][0][1];
 849                     s->f_count++;
 850                 }
 851                 if (s->mv_dir & MV_DIR_BACKWARD) {
 852                     mpeg1_encode_motion(s,
 853                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 854                                         s->b_code);
 855                     mpeg1_encode_motion(s,
 856                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 857                                         s->b_code);
 858                     s->last_mv[1][0][0] =
 859                     s->last_mv[1][1][0] = s->mv[1][0][0];
 860                     s->last_mv[1][0][1] =
 861                     s->last_mv[1][1][1] = s->mv[1][0][1];
 862                     s->b_count++;
 863                 }
 864             } else {
 865                 assert(s->mv_type == MV_TYPE_FIELD);
 866                 assert(!s->frame_pred_frame_dct);
 867                 if (cbp) {                      // With coded bloc pattern
 868                     if (s->dquant) {
 869                         if (s->mv_dir == MV_DIR_FORWARD)
 870                             put_mb_modes(s, 6, 3, 1, 1);
 871                         else
 872                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 873                         put_qscale(s);
 874                     } else {
 875                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 876                     }
 877                 } else {                        // No coded bloc pattern
 878                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 879                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 880                     s->qscale -= s->dquant;
 881                 }
 882                 s->misc_bits += get_bits_diff(s);
 883                 if (s->mv_dir & MV_DIR_FORWARD) {
 884                     for (i = 0; i < 2; i++) {
 885                         put_bits(&s->pb, 1, s->field_select[0][i]);
 886                         mpeg1_encode_motion(s,
 887                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 888                                             s->f_code);
 889                         mpeg1_encode_motion(s,
 890                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 891                                             s->f_code);
 892                         s->last_mv[0][i][0] = s->mv[0][i][0];
 893                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 894                     }
 895                     s->f_count++;
 896                 }
 897                 if (s->mv_dir & MV_DIR_BACKWARD) {
 898                     for (i = 0; i < 2; i++) {
 899                         put_bits(&s->pb, 1, s->field_select[1][i]);
 900                         mpeg1_encode_motion(s,
 901                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 902                                             s->b_code);
 903                         mpeg1_encode_motion(s,
 904                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 905                                             s->b_code);
 906                         s->last_mv[1][i][0] = s->mv[1][i][0];
 907                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 908                     }
 909                     s->b_count++;
 910                 }
 911             }
 912             s->mv_bits += get_bits_diff(s);
 913             if (cbp) {
 914                 if (s->chroma_y_shift) {
 915                     put_bits(&s->pb,
 916                              ff_mpeg12_mbPatTable[cbp][1],
 917                              ff_mpeg12_mbPatTable[cbp][0]);
 918                 } else {
 919                     put_bits(&s->pb,
 920                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 921                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 922                     put_sbits(&s->pb, 2, cbp);
 923                 }
 924             }
 925         }
 926         for (i = 0; i < mb_block_count; i++)
 927             if (cbp & (1 << (mb_block_count - 1 - i)))
 928                 mpeg1_encode_block(s, block[i], i);
 929         s->mb_skip_run = 0;
 930         if (s->mb_intra)
 931             s->i_tex_bits += get_bits_diff(s);
 932         else
 933             s->p_tex_bits += get_bits_diff(s);
 934     }
 935 }
 936
 937 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
 938                         int motion_x, int motion_y)
 939 {
 940     if (s->chroma_format == CHROMA_420)
 941         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
 942     else
 943         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
 944 }
 945
 946 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
 947 {
 948     static int done = 0;
 949
 950     ff_mpeg12_common_init(s);
 951
 952     if (!done) {
 953         int f_code;
 954         int mv;
 955         int i;
 956
 957         done = 1;
 958         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
 959         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
 960
 961         for (i = 0; i < 64; i++) {
 962             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
 963             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
 964         }
 965
 966         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
 967         if (s->intra_vlc_format)
 968             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
 969
 970         /* build unified dc encoding tables */
 971         for (i = -255; i < 256; i++) {
 972             int adiff, index;
 973             int bits, code;
 974             int diff = i;
 975
 976             adiff = FFABS(diff);
 977             if (diff < 0)
 978                 diff--;
 979             index = av_log2(2 * adiff);
 980
 981             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
 982             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 983                    (diff & ((1 << index) - 1));
 984             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
 985
 986             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
 987             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 988                    (diff & ((1 << index) - 1));
 989             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
 990         }
 991
 992         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
 993             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
 994                 int len;
 995
 996                 if (mv == 0) {
 997                     len = ff_mpeg12_mbMotionVectorTable[0][1];
 998                 } else {
 999                     int val, bit_size, code;
1000
1001                     bit_size = f_code - 1;
1002
1003                     val = mv;
1004                     if (val < 0)
1005                         val = -val;
1006                     val--;
1007                     code = (val >> bit_size) + 1;
1008                     if (code < 17)
1009                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1010                               1 + bit_size;
1011                     else
1012                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1013                               2 + bit_size;
1014                 }
1015
1016                 mv_penalty[f_code][mv + MAX_MV] = len;
1017             }
1018
1019
1020         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1021             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1022                 fcode_tab[mv + MAX_MV] = f_code;
1023     }
1024     s->me.mv_penalty = mv_penalty;
1025     s->fcode_tab     = fcode_tab;
1026     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1027         s->min_qcoeff = -255;
1028         s->max_qcoeff = 255;
1029     } else {
1030         s->min_qcoeff = -2047;
1031         s->max_qcoeff = 2047;
1032     }
1033     if (s->intra_vlc_format) {
1034         s->intra_ac_vlc_length      =
1035         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1036     } else {
1037         s->intra_ac_vlc_length      =
1038         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1039     }
1040     s->inter_ac_vlc_length      =
1041     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1042 }
1043
1044 #define OFFSET(x) offsetof(MpegEncContext, x)
1045 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1046 #define COMMON_OPTS                                                           \
1047     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1048       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1049     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1050       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1051     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1052       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1053
1054 static const AVOption mpeg1_options[] = {
1055     COMMON_OPTS
1056     FF_MPV_COMMON_OPTS
1057     { NULL },
1058 };
1059
1060 static const AVOption mpeg2_options[] = {
1061     COMMON_OPTS
1062     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1063     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1064     FF_MPV_COMMON_OPTS
1065     { NULL },
1066 };
1067
1068 #define mpeg12_class(x)                                 \
1069 static const AVClass mpeg ## x ## _class = {            \
1070     .class_name = "mpeg" # x "video encoder",           \
1071     .item_name  = av_default_item_name,                 \
1072     .option     = mpeg ## x ## _options,                \
1073     .version    = LIBAVUTIL_VERSION_INT,                \
1074 };
1075
1076 mpeg12_class(1)
1077 mpeg12_class(2)
1078
1079 AVCodec ff_mpeg1video_encoder = {
1080     .name                 = "mpeg1video",
1081     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1082     .type                 = AVMEDIA_TYPE_VIDEO,
1083     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1084     .priv_data_size       = sizeof(MpegEncContext),
1085     .init                 = encode_init,
1086     .encode2              = ff_mpv_encode_picture,
1087     .close                = ff_mpv_encode_end,
1088     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1089     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1090                                                            AV_PIX_FMT_NONE },
1091     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1092     .priv_class           = &mpeg1_class,
1093 };
1094
1095 AVCodec ff_mpeg2video_encoder = {
1096     .name                 = "mpeg2video",
1097     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1098     .type                 = AVMEDIA_TYPE_VIDEO,
1099     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1100     .priv_data_size       = sizeof(MpegEncContext),
1101     .init                 = encode_init,
1102     .encode2              = ff_mpv_encode_picture,
1103     .close                = ff_mpv_encode_end,
1104     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1105     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1106                                                            AV_PIX_FMT_YUV422P,
1107                                                            AV_PIX_FMT_NONE },
1108     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1109     .priv_class           = &mpeg2_class,
1110 };