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 FFmpeg.
   7  *
   8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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/avassert.h"
  32 #include "libavutil/log.h"
  33 #include "libavutil/opt.h"
  34 #include "libavutil/timecode.h"
  35 #include "libavutil/stereo3d.h"
  36
  37 #include "avcodec.h"
  38 #include "bytestream.h"
  39 #include "mathops.h"
  40 #include "mpeg12.h"
  41 #include "mpeg12data.h"
  42 #include "mpegvideo.h"
  43
  44
  45 static const uint8_t inv_non_linear_qscale[] = {
  46     0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
  47 };
  48
  49 static const uint8_t svcd_scan_offset_placeholder[] = {
  50     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
  51     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  52 };
  53
  54 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
  55 static uint8_t fcode_tab[MAX_MV * 2 + 1];
  56
  57 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
  58 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
  59
  60 /* simple include everything table for dc, first byte is bits
  61  * number next 3 are code */
  62 static uint32_t mpeg1_lum_dc_uni[512];
  63 static uint32_t mpeg1_chr_dc_uni[512];
  64
  65 static uint8_t mpeg1_index_run[2][64];
  66 static int8_t  mpeg1_max_level[2][64];
  67
  68 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
  69 {
  70     int i;
  71
  72     for (i = 0; i < 128; i++) {
  73         int level = i - 64;
  74         int run;
  75         if (!level)
  76             continue;
  77         for (run = 0; run < 64; run++) {
  78             int len, code;
  79             int alevel = FFABS(level);
  80
  81             if (alevel > rl->max_level[0][run])
  82                 code = 111;                         /* rl->n */
  83             else
  84                 code = rl->index_run[0][run] + alevel - 1;
  85
  86             if (code < 111) {                       /* rl->n */
  87                 /* length of VLC and sign */
  88                 len = rl->table_vlc[code][1] + 1;
  89             } else {
  90                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
  91
  92                 if (alevel < 128)
  93                     len += 8;
  94                 else
  95                     len += 16;
  96             }
  97
  98             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
  99         }
 100     }
 101 }
 102
 103 static int find_frame_rate_index(MpegEncContext *s)
 104 {
 105     int i;
 106     AVRational bestq = (AVRational) {0, 0};
 107     AVRational ext;
 108     AVRational target = av_inv_q(s->avctx->time_base);
 109
 110     for (i = 1; i < 14; i++) {
 111         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
 112             i >= 9)
 113             break;
 114
 115         for (ext.num=1; ext.num <= 4; ext.num++) {
 116             for (ext.den=1; ext.den <= 32; ext.den++) {
 117                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
 118
 119                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
 120                     continue;
 121                 if (av_gcd(ext.den, ext.num) != 1)
 122                     continue;
 123
 124                 if (    bestq.num==0
 125                     || av_nearer_q(target, bestq, q) < 0
 126                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
 127                     bestq               = q;
 128                     s->frame_rate_index = i;
 129                     s->mpeg2_frame_rate_ext.num = ext.num;
 130                     s->mpeg2_frame_rate_ext.den = ext.den;
 131                 }
 132             }
 133         }
 134     }
 135
 136     if (av_cmp_q(target, bestq))
 137         return -1;
 138     else
 139         return 0;
 140 }
 141
 142 static av_cold int encode_init(AVCodecContext *avctx)
 143 {
 144     MpegEncContext *s = avctx->priv_data;
 145
 146     if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
 147         avctx->thread_count = 1;
 148
 149     if (ff_MPV_encode_init(avctx) < 0)
 150         return -1;
 151
 152     if (find_frame_rate_index(s) < 0) {
 153         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 154             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
 155                    avctx->time_base.den, avctx->time_base.num);
 156             return -1;
 157         } else {
 158             av_log(avctx, AV_LOG_INFO,
 159                    "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
 160                    avctx->time_base.den, avctx->time_base.num);
 161         }
 162     }
 163
 164     if (avctx->profile == FF_PROFILE_UNKNOWN) {
 165         if (avctx->level != FF_LEVEL_UNKNOWN) {
 166             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
 167             return -1;
 168         }
 169         /* Main or 4:2:2 */
 170         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
 171     }
 172
 173     if (avctx->level == FF_LEVEL_UNKNOWN) {
 174         if (avctx->profile == 0) {                  /* 4:2:2 */
 175             if (avctx->width <= 720 && avctx->height <= 608)
 176                 avctx->level = 5;                   /* Main */
 177             else
 178                 avctx->level = 2;                   /* High */
 179         } else {
 180             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
 181                 av_log(avctx, AV_LOG_ERROR,
 182                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
 183                 return -1;
 184             }
 185             if (avctx->width <= 720 && avctx->height <= 576)
 186                 avctx->level = 8;                   /* Main */
 187             else if (avctx->width <= 1440)
 188                 avctx->level = 6;                   /* High 1440 */
 189             else
 190                 avctx->level = 4;                   /* High */
 191         }
 192     }
 193
 194     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
 195         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
 196         return AVERROR(EINVAL);
 197     }
 198
 199     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
 200         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
 201             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
 202                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
 203             return AVERROR(EINVAL);
 204         }
 205     }
 206
 207     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
 208     if (s->drop_frame_timecode)
 209         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
 210     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
 211         av_log(avctx, AV_LOG_ERROR,
 212                "Drop frame time code only allowed with 1001/30000 fps\n");
 213         return -1;
 214     }
 215
 216     if (s->tc_opt_str) {
 217         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 218         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
 219         if (ret < 0)
 220             return ret;
 221         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
 222         s->avctx->timecode_frame_start = s->tc.start;
 223     } else {
 224         s->avctx->timecode_frame_start = 0; // default is -1
 225     }
 226     return 0;
 227 }
 228
 229 static void put_header(MpegEncContext *s, int header)
 230 {
 231     avpriv_align_put_bits(&s->pb);
 232     put_bits(&s->pb, 16, header >> 16);
 233     put_sbits(&s->pb, 16, header);
 234 }
 235
 236 /* put sequence header if needed */
 237 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 238 {
 239     unsigned int vbv_buffer_size, fps, v;
 240     int i, constraint_parameter_flag;
 241     uint64_t time_code;
 242     float best_aspect_error = 1E10;
 243     float aspect_ratio      = av_q2d(s->avctx->sample_aspect_ratio);
 244
 245     if (aspect_ratio == 0.0)
 246         aspect_ratio = 1.0;             // pixel aspect 1.1 (VGA)
 247
 248     if (s->current_picture.f.key_frame) {
 249         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 250
 251         /* mpeg1 header repeated every gop */
 252         put_header(s, SEQ_START_CODE);
 253
 254         put_sbits(&s->pb, 12, s->width  & 0xFFF);
 255         put_sbits(&s->pb, 12, s->height & 0xFFF);
 256
 257         for (i = 1; i < 15; i++) {
 258             float error = aspect_ratio;
 259             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
 260                 error -= 1.0 / ff_mpeg1_aspect[i];
 261             else
 262                 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
 263
 264             error = FFABS(error);
 265
 266             if (error < best_aspect_error) {
 267                 best_aspect_error    = error;
 268                 s->aspect_ratio_info = i;
 269             }
 270         }
 271
 272         put_bits(&s->pb, 4, s->aspect_ratio_info);
 273         put_bits(&s->pb, 4, s->frame_rate_index);
 274
 275         if (s->avctx->rc_max_rate) {
 276             v = (s->avctx->rc_max_rate + 399) / 400;
 277             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 278                 v = 0x3ffff;
 279         } else {
 280             v = 0x3FFFF;
 281         }
 282
 283         if (s->avctx->rc_buffer_size)
 284             vbv_buffer_size = s->avctx->rc_buffer_size;
 285         else
 286             /* VBV calculation: Scaled so that a VCD has the proper
 287              * VBV size of 40 kilobytes */
 288             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
 289         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
 290
 291         put_sbits(&s->pb, 18, v);
 292         put_bits(&s->pb, 1, 1);         // marker
 293         put_sbits(&s->pb, 10, vbv_buffer_size);
 294
 295         constraint_parameter_flag =
 296             s->width  <= 768                                    &&
 297             s->height <= 576                                    &&
 298             s->mb_width * s->mb_height                 <= 396   &&
 299             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
 300             framerate.num <= framerate.den * 30                 &&
 301             s->avctx->me_range                                  &&
 302             s->avctx->me_range < 128                            &&
 303             vbv_buffer_size <= 20                               &&
 304             v <= 1856000 / 400                                  &&
 305             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
 306
 307         put_bits(&s->pb, 1, constraint_parameter_flag);
 308
 309         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 310         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 311
 312         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 313             put_header(s, EXT_START_CODE);
 314             put_bits(&s->pb, 4, 1);                 // seq ext
 315
 316             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
 317
 318             put_bits(&s->pb, 3, s->avctx->profile); // profile
 319             put_bits(&s->pb, 4, s->avctx->level);   // level
 320
 321             put_bits(&s->pb, 1, s->progressive_sequence);
 322             put_bits(&s->pb, 2, s->chroma_format);
 323             put_bits(&s->pb, 2, s->width  >> 12);
 324             put_bits(&s->pb, 2, s->height >> 12);
 325             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
 326             put_bits(&s->pb, 1, 1);                 // marker
 327             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
 328             put_bits(&s->pb, 1, s->low_delay);
 329             put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
 330             put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
 331         }
 332
 333         put_header(s, GOP_START_CODE);
 334         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
 335         /* time code: we must convert from the real frame rate to a
 336          * fake MPEG frame rate in case of low frame rate */
 337         fps       = (framerate.num + framerate.den / 2) / framerate.den;
 338         time_code = s->current_picture_ptr->f.coded_picture_number +
 339                     s->avctx->timecode_frame_start;
 340
 341         s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
 342
 343         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
 344         if (s->drop_frame_timecode)
 345             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
 346
 347         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
 348         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
 349         put_bits(&s->pb, 1, 1);
 350         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
 351         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
 352         put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
 353         put_bits(&s->pb, 1, 0);                     // broken link
 354     }
 355 }
 356
 357 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 358 {
 359     while (run >= 33) {
 360         put_bits(&s->pb, 11, 0x008);
 361         run -= 33;
 362     }
 363     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 364              ff_mpeg12_mbAddrIncrTable[run][0]);
 365 }
 366
 367 static av_always_inline void put_qscale(MpegEncContext *s)
 368 {
 369     if (s->q_scale_type) {
 370         av_assert2(s->qscale >= 1 && s->qscale <= 12);
 371         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
 372     } else {
 373         put_bits(&s->pb, 5, s->qscale);
 374     }
 375 }
 376
 377 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 378 {
 379     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
 380         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
 381         /* slice_vertical_position_extension */
 382         put_bits(&s->pb, 3, s->mb_y >> 7);
 383     } else {
 384         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 385     }
 386     put_qscale(s);
 387     /* slice extra information */
 388     put_bits(&s->pb, 1, 0);
 389 }
 390
 391 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 392 {
 393     AVFrameSideData *side_data;
 394     mpeg1_encode_sequence_header(s);
 395
 396     /* mpeg1 picture header */
 397     put_header(s, PICTURE_START_CODE);
 398     /* temporal reference */
 399
 400     // RAL: s->picture_number instead of s->fake_picture_number
 401     put_bits(&s->pb, 10,
 402              (s->picture_number - s->gop_picture_number) & 0x3ff);
 403     put_bits(&s->pb, 3, s->pict_type);
 404
 405     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 406     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 407
 408     // RAL: Forward f_code also needed for B-frames
 409     if (s->pict_type == AV_PICTURE_TYPE_P ||
 410         s->pict_type == AV_PICTURE_TYPE_B) {
 411         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 412         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 413             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
 414         else
 415             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 416     }
 417
 418     // RAL: Backward f_code necessary for B-frames
 419     if (s->pict_type == AV_PICTURE_TYPE_B) {
 420         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 421         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 422             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
 423         else
 424             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 425     }
 426
 427     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 428
 429     s->frame_pred_frame_dct = 1;
 430     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 431         put_header(s, EXT_START_CODE);
 432         put_bits(&s->pb, 4, 8);                 /* pic ext */
 433         if (s->pict_type == AV_PICTURE_TYPE_P ||
 434             s->pict_type == AV_PICTURE_TYPE_B) {
 435             put_bits(&s->pb, 4, s->f_code);
 436             put_bits(&s->pb, 4, s->f_code);
 437         } else {
 438             put_bits(&s->pb, 8, 255);
 439         }
 440         if (s->pict_type == AV_PICTURE_TYPE_B) {
 441             put_bits(&s->pb, 4, s->b_code);
 442             put_bits(&s->pb, 4, s->b_code);
 443         } else {
 444             put_bits(&s->pb, 8, 255);
 445         }
 446         put_bits(&s->pb, 2, s->intra_dc_precision);
 447
 448         av_assert0(s->picture_structure == PICT_FRAME);
 449         put_bits(&s->pb, 2, s->picture_structure);
 450         if (s->progressive_sequence)
 451             put_bits(&s->pb, 1, 0);             /* no repeat */
 452         else
 453             put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
 454         /* XXX: optimize the generation of this flag with entropy measures */
 455         s->frame_pred_frame_dct = s->progressive_sequence;
 456
 457         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
 458         put_bits(&s->pb, 1, s->concealment_motion_vectors);
 459         put_bits(&s->pb, 1, s->q_scale_type);
 460         put_bits(&s->pb, 1, s->intra_vlc_format);
 461         put_bits(&s->pb, 1, s->alternate_scan);
 462         put_bits(&s->pb, 1, s->repeat_first_field);
 463         s->progressive_frame = s->progressive_sequence;
 464         /* chroma_420_type */
 465         put_bits(&s->pb, 1, s->chroma_format ==
 466                             CHROMA_420 ? s->progressive_frame : 0);
 467         put_bits(&s->pb, 1, s->progressive_frame);
 468         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
 469     }
 470     if (s->scan_offset) {
 471         int i;
 472
 473         put_header(s, USER_START_CODE);
 474         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
 475             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
 476     }
 477     side_data = av_frame_get_side_data(&s->current_picture_ptr->f,
 478                                        AV_FRAME_DATA_STEREO3D);
 479     if (side_data) {
 480         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 481         uint8_t fpa_type;
 482
 483         switch (stereo->type) {
 484         case AV_STEREO3D_SIDEBYSIDE:
 485             fpa_type = 0x03;
 486             break;
 487         case AV_STEREO3D_TOPBOTTOM:
 488             fpa_type = 0x04;
 489             break;
 490         case AV_STEREO3D_2D:
 491             fpa_type = 0x08;
 492             break;
 493         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 494             fpa_type = 0x23;
 495             break;
 496         default:
 497             fpa_type = 0;
 498             break;
 499         }
 500
 501         if (fpa_type != 0) {
 502             put_header(s, USER_START_CODE);
 503             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
 504             put_bits(&s->pb, 8, 'P');
 505             put_bits(&s->pb, 8, '3');
 506             put_bits(&s->pb, 8, 'D');
 507             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
 508
 509             put_bits(&s->pb, 1, 1);     // reserved_bit
 510             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
 511             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
 512             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
 513         }
 514     }
 515
 516     s->mb_y = 0;
 517     ff_mpeg1_encode_slice_header(s);
 518 }
 519
 520 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 521                                 int has_mv, int field_motion)
 522 {
 523     put_bits(&s->pb, n, bits);
 524     if (!s->frame_pred_frame_dct) {
 525         if (has_mv)
 526             /* motion_type: frame/field */
 527             put_bits(&s->pb, 2, 2 - field_motion);
 528         put_bits(&s->pb, 1, s->interlaced_dct);
 529     }
 530 }
 531
 532 // RAL: Parameter added: f_or_b_code
 533 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 534 {
 535     if (val == 0) {
 536         /* zero vector */
 537         put_bits(&s->pb,
 538                  ff_mpeg12_mbMotionVectorTable[0][1],
 539                  ff_mpeg12_mbMotionVectorTable[0][0]);
 540     } else {
 541         int code, sign, bits;
 542         int bit_size = f_or_b_code - 1;
 543         int range    = 1 << bit_size;
 544         /* modulo encoding */
 545         val = sign_extend(val, 5 + bit_size);
 546
 547         if (val >= 0) {
 548             val--;
 549             code = (val >> bit_size) + 1;
 550             bits = val & (range - 1);
 551             sign = 0;
 552         } else {
 553             val = -val;
 554             val--;
 555             code = (val >> bit_size) + 1;
 556             bits = val & (range - 1);
 557             sign = 1;
 558         }
 559
 560         av_assert2(code > 0 && code <= 16);
 561
 562         put_bits(&s->pb,
 563                  ff_mpeg12_mbMotionVectorTable[code][1],
 564                  ff_mpeg12_mbMotionVectorTable[code][0]);
 565
 566         put_bits(&s->pb, 1, sign);
 567         if (bit_size > 0)
 568             put_bits(&s->pb, bit_size, bits);
 569     }
 570 }
 571
 572 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 573 {
 574     if (((unsigned) (diff + 255)) >= 511) {
 575         int index;
 576
 577         if (diff < 0) {
 578             index = av_log2_16bit(-2 * diff);
 579             diff--;
 580         } else {
 581             index = av_log2_16bit(2 * diff);
 582         }
 583         if (component == 0)
 584             put_bits(&s->pb,
 585                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 586                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 587                      (diff & ((1 << index) - 1)));
 588         else
 589             put_bits(&s->pb,
 590                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 591                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 592                      (diff & ((1 << index) - 1)));
 593     } else {
 594         if (component == 0)
 595             put_bits(&s->pb,
 596                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 597                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 598         else
 599             put_bits(&s->pb,
 600                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 601                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 602     }
 603 }
 604
 605 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 606 {
 607     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 608     int code, component;
 609     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 610
 611     last_index = s->block_last_index[n];
 612
 613     /* DC coef */
 614     if (s->mb_intra) {
 615         component = (n <= 3 ? 0 : (n & 1) + 1);
 616         dc        = block[0];                   /* overflow is impossible */
 617         diff      = dc - s->last_dc[component];
 618         encode_dc(s, diff, component);
 619         s->last_dc[component] = dc;
 620         i = 1;
 621         if (s->intra_vlc_format)
 622             table_vlc = ff_rl_mpeg2.table_vlc;
 623     } else {
 624         /* encode the first coefficient: needs to be done here because
 625          * it is handled slightly differently */
 626         level = block[0];
 627         if (abs(level) == 1) {
 628             code = ((uint32_t)level >> 31);     /* the sign bit */
 629             put_bits(&s->pb, 2, code | 0x02);
 630             i = 1;
 631         } else {
 632             i             = 0;
 633             last_non_zero = -1;
 634             goto next_coef;
 635         }
 636     }
 637
 638     /* now quantify & encode AC coefs */
 639     last_non_zero = i - 1;
 640
 641     for (; i <= last_index; i++) {
 642         j     = s->intra_scantable.permutated[i];
 643         level = block[j];
 644
 645 next_coef:
 646         /* encode using VLC */
 647         if (level != 0) {
 648             run = i - last_non_zero - 1;
 649
 650             alevel = level;
 651             MASK_ABS(sign, alevel);
 652             sign &= 1;
 653
 654             if (alevel <= mpeg1_max_level[0][run]) {
 655                 code = mpeg1_index_run[0][run] + alevel - 1;
 656                 /* store the VLC & sign at once */
 657                 put_bits(&s->pb, table_vlc[code][1] + 1,
 658                          (table_vlc[code][0] << 1) + sign);
 659             } else {
 660                 /* escape seems to be pretty rare <5% so I do not optimize it */
 661                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 662                 /* escape: only clip in this case */
 663                 put_bits(&s->pb, 6, run);
 664                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 665                     if (alevel < 128) {
 666                         put_sbits(&s->pb, 8, level);
 667                     } else {
 668                         if (level < 0)
 669                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 670                         else
 671                             put_sbits(&s->pb, 16, level);
 672                     }
 673                 } else {
 674                     put_sbits(&s->pb, 12, level);
 675                 }
 676             }
 677             last_non_zero = i;
 678         }
 679     }
 680     /* end of block */
 681     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 682 }
 683
 684 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 685                                                       int16_t block[6][64],
 686                                                       int motion_x, int motion_y,
 687                                                       int mb_block_count)
 688 {
 689     int i, cbp;
 690     const int mb_x     = s->mb_x;
 691     const int mb_y     = s->mb_y;
 692     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 693
 694     /* compute cbp */
 695     cbp = 0;
 696     for (i = 0; i < mb_block_count; i++)
 697         if (s->block_last_index[i] >= 0)
 698             cbp |= 1 << (mb_block_count - 1 - i);
 699
 700     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 701         (mb_x != s->mb_width - 1 ||
 702          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 703         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 704          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 705           (((s->mv_dir & MV_DIR_FORWARD)
 706             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 707                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 708            ((s->mv_dir & MV_DIR_BACKWARD)
 709             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 710                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 711         s->mb_skip_run++;
 712         s->qscale -= s->dquant;
 713         s->skip_count++;
 714         s->misc_bits++;
 715         s->last_bits++;
 716         if (s->pict_type == AV_PICTURE_TYPE_P) {
 717             s->last_mv[0][0][0] =
 718             s->last_mv[0][0][1] =
 719             s->last_mv[0][1][0] =
 720             s->last_mv[0][1][1] = 0;
 721         }
 722     } else {
 723         if (first_mb) {
 724             av_assert0(s->mb_skip_run == 0);
 725             encode_mb_skip_run(s, s->mb_x);
 726         } else {
 727             encode_mb_skip_run(s, s->mb_skip_run);
 728         }
 729
 730         if (s->pict_type == AV_PICTURE_TYPE_I) {
 731             if (s->dquant && cbp) {
 732                 /* macroblock_type: macroblock_quant = 1 */
 733                 put_mb_modes(s, 2, 1, 0, 0);
 734                 put_qscale(s);
 735             } else {
 736                 /* macroblock_type: macroblock_quant = 0 */
 737                 put_mb_modes(s, 1, 1, 0, 0);
 738                 s->qscale -= s->dquant;
 739             }
 740             s->misc_bits += get_bits_diff(s);
 741             s->i_count++;
 742         } else if (s->mb_intra) {
 743             if (s->dquant && cbp) {
 744                 put_mb_modes(s, 6, 0x01, 0, 0);
 745                 put_qscale(s);
 746             } else {
 747                 put_mb_modes(s, 5, 0x03, 0, 0);
 748                 s->qscale -= s->dquant;
 749             }
 750             s->misc_bits += get_bits_diff(s);
 751             s->i_count++;
 752             memset(s->last_mv, 0, sizeof(s->last_mv));
 753         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 754             if (s->mv_type == MV_TYPE_16X16) {
 755                 if (cbp != 0) {
 756                     if ((motion_x | motion_y) == 0) {
 757                         if (s->dquant) {
 758                             /* macroblock_pattern & quant */
 759                             put_mb_modes(s, 5, 1, 0, 0);
 760                             put_qscale(s);
 761                         } else {
 762                             /* macroblock_pattern only */
 763                             put_mb_modes(s, 2, 1, 0, 0);
 764                         }
 765                         s->misc_bits += get_bits_diff(s);
 766                     } else {
 767                         if (s->dquant) {
 768                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 769                             put_qscale(s);
 770                         } else {
 771                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 772                         }
 773                         s->misc_bits += get_bits_diff(s);
 774                         // RAL: f_code parameter added
 775                         mpeg1_encode_motion(s,
 776                                             motion_x - s->last_mv[0][0][0],
 777                                             s->f_code);
 778                         // RAL: f_code parameter added
 779                         mpeg1_encode_motion(s,
 780                                             motion_y - s->last_mv[0][0][1],
 781                                             s->f_code);
 782                         s->mv_bits += get_bits_diff(s);
 783                     }
 784                 } else {
 785                     put_bits(&s->pb, 3, 1);         /* motion only */
 786                     if (!s->frame_pred_frame_dct)
 787                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 788                     s->misc_bits += get_bits_diff(s);
 789                     // RAL: f_code parameter added
 790                     mpeg1_encode_motion(s,
 791                                         motion_x - s->last_mv[0][0][0],
 792                                         s->f_code);
 793                     // RAL: f_code parameter added
 794                     mpeg1_encode_motion(s,
 795                                         motion_y - s->last_mv[0][0][1],
 796                                         s->f_code);
 797                     s->qscale  -= s->dquant;
 798                     s->mv_bits += get_bits_diff(s);
 799                 }
 800                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 801                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 802             } else {
 803                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 804
 805                 if (cbp) {
 806                     if (s->dquant) {
 807                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 808                         put_qscale(s);
 809                     } else {
 810                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 811                     }
 812                 } else {
 813                     put_bits(&s->pb, 3, 1);             /* motion only */
 814                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 815                     s->qscale -= s->dquant;
 816                 }
 817                 s->misc_bits += get_bits_diff(s);
 818                 for (i = 0; i < 2; i++) {
 819                     put_bits(&s->pb, 1, s->field_select[0][i]);
 820                     mpeg1_encode_motion(s,
 821                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 822                                         s->f_code);
 823                     mpeg1_encode_motion(s,
 824                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 825                                         s->f_code);
 826                     s->last_mv[0][i][0] = s->mv[0][i][0];
 827                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 828                 }
 829                 s->mv_bits += get_bits_diff(s);
 830             }
 831             if (cbp) {
 832                 if (s->chroma_y_shift) {
 833                     put_bits(&s->pb,
 834                              ff_mpeg12_mbPatTable[cbp][1],
 835                              ff_mpeg12_mbPatTable[cbp][0]);
 836                 } else {
 837                     put_bits(&s->pb,
 838                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 839                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 840                     put_sbits(&s->pb, 2, cbp);
 841                 }
 842             }
 843             s->f_count++;
 844         } else {
 845             if (s->mv_type == MV_TYPE_16X16) {
 846                 if (cbp) {                      // With coded bloc pattern
 847                     if (s->dquant) {
 848                         if (s->mv_dir == MV_DIR_FORWARD)
 849                             put_mb_modes(s, 6, 3, 1, 0);
 850                         else
 851                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 852                         put_qscale(s);
 853                     } else {
 854                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 855                     }
 856                 } else {                        // No coded bloc pattern
 857                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 858                     if (!s->frame_pred_frame_dct)
 859                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 860                     s->qscale -= s->dquant;
 861                 }
 862                 s->misc_bits += get_bits_diff(s);
 863                 if (s->mv_dir & MV_DIR_FORWARD) {
 864                     mpeg1_encode_motion(s,
 865                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 866                                         s->f_code);
 867                     mpeg1_encode_motion(s,
 868                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 869                                         s->f_code);
 870                     s->last_mv[0][0][0] =
 871                     s->last_mv[0][1][0] = s->mv[0][0][0];
 872                     s->last_mv[0][0][1] =
 873                     s->last_mv[0][1][1] = s->mv[0][0][1];
 874                     s->f_count++;
 875                 }
 876                 if (s->mv_dir & MV_DIR_BACKWARD) {
 877                     mpeg1_encode_motion(s,
 878                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 879                                         s->b_code);
 880                     mpeg1_encode_motion(s,
 881                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 882                                         s->b_code);
 883                     s->last_mv[1][0][0] =
 884                     s->last_mv[1][1][0] = s->mv[1][0][0];
 885                     s->last_mv[1][0][1] =
 886                     s->last_mv[1][1][1] = s->mv[1][0][1];
 887                     s->b_count++;
 888                 }
 889             } else {
 890                 av_assert2(s->mv_type == MV_TYPE_FIELD);
 891                 av_assert2(!s->frame_pred_frame_dct);
 892                 if (cbp) {                      // With coded bloc pattern
 893                     if (s->dquant) {
 894                         if (s->mv_dir == MV_DIR_FORWARD)
 895                             put_mb_modes(s, 6, 3, 1, 1);
 896                         else
 897                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 898                         put_qscale(s);
 899                     } else {
 900                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 901                     }
 902                 } else {                        // No coded bloc pattern
 903                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 904                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 905                     s->qscale -= s->dquant;
 906                 }
 907                 s->misc_bits += get_bits_diff(s);
 908                 if (s->mv_dir & MV_DIR_FORWARD) {
 909                     for (i = 0; i < 2; i++) {
 910                         put_bits(&s->pb, 1, s->field_select[0][i]);
 911                         mpeg1_encode_motion(s,
 912                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 913                                             s->f_code);
 914                         mpeg1_encode_motion(s,
 915                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 916                                             s->f_code);
 917                         s->last_mv[0][i][0] = s->mv[0][i][0];
 918                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 919                     }
 920                     s->f_count++;
 921                 }
 922                 if (s->mv_dir & MV_DIR_BACKWARD) {
 923                     for (i = 0; i < 2; i++) {
 924                         put_bits(&s->pb, 1, s->field_select[1][i]);
 925                         mpeg1_encode_motion(s,
 926                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 927                                             s->b_code);
 928                         mpeg1_encode_motion(s,
 929                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 930                                             s->b_code);
 931                         s->last_mv[1][i][0] = s->mv[1][i][0];
 932                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 933                     }
 934                     s->b_count++;
 935                 }
 936             }
 937             s->mv_bits += get_bits_diff(s);
 938             if (cbp) {
 939                 if (s->chroma_y_shift) {
 940                     put_bits(&s->pb,
 941                              ff_mpeg12_mbPatTable[cbp][1],
 942                              ff_mpeg12_mbPatTable[cbp][0]);
 943                 } else {
 944                     put_bits(&s->pb,
 945                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 946                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 947                     put_sbits(&s->pb, 2, cbp);
 948                 }
 949             }
 950         }
 951         for (i = 0; i < mb_block_count; i++)
 952             if (cbp & (1 << (mb_block_count - 1 - i)))
 953                 mpeg1_encode_block(s, block[i], i);
 954         s->mb_skip_run = 0;
 955         if (s->mb_intra)
 956             s->i_tex_bits += get_bits_diff(s);
 957         else
 958             s->p_tex_bits += get_bits_diff(s);
 959     }
 960 }
 961
 962 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
 963                         int motion_x, int motion_y)
 964 {
 965     if (s->chroma_format == CHROMA_420)
 966         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
 967     else
 968         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
 969 }
 970
 971 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
 972 {
 973     static int done = 0;
 974
 975     ff_mpeg12_common_init(s);
 976
 977     if (!done) {
 978         int f_code;
 979         int mv;
 980         int i;
 981
 982         done = 1;
 983         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
 984         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
 985
 986         for (i = 0; i < 64; i++) {
 987             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
 988             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
 989         }
 990
 991         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
 992         if (s->intra_vlc_format)
 993             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
 994
 995         /* build unified dc encoding tables */
 996         for (i = -255; i < 256; i++) {
 997             int adiff, index;
 998             int bits, code;
 999             int diff = i;
1000
1001             adiff = FFABS(diff);
1002             if (diff < 0)
1003                 diff--;
1004             index = av_log2(2 * adiff);
1005
1006             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1007             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1008                    (diff & ((1 << index) - 1));
1009             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1010
1011             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1012             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1013                    (diff & ((1 << index) - 1));
1014             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1015         }
1016
1017         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1018             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1019                 int len;
1020
1021                 if (mv == 0) {
1022                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1023                 } else {
1024                     int val, bit_size, code;
1025
1026                     bit_size = f_code - 1;
1027
1028                     val = mv;
1029                     if (val < 0)
1030                         val = -val;
1031                     val--;
1032                     code = (val >> bit_size) + 1;
1033                     if (code < 17)
1034                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1035                               1 + bit_size;
1036                     else
1037                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1038                               2 + bit_size;
1039                 }
1040
1041                 mv_penalty[f_code][mv + MAX_MV] = len;
1042             }
1043
1044
1045         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1046             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1047                 fcode_tab[mv + MAX_MV] = f_code;
1048     }
1049     s->me.mv_penalty = mv_penalty;
1050     s->fcode_tab     = fcode_tab;
1051     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1052         s->min_qcoeff = -255;
1053         s->max_qcoeff = 255;
1054     } else {
1055         s->min_qcoeff = -2047;
1056         s->max_qcoeff = 2047;
1057     }
1058     if (s->intra_vlc_format) {
1059         s->intra_ac_vlc_length      =
1060         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1061     } else {
1062         s->intra_ac_vlc_length      =
1063         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1064     }
1065     s->inter_ac_vlc_length      =
1066     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1067 }
1068
1069 #define OFFSET(x) offsetof(MpegEncContext, x)
1070 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1071 #define COMMON_OPTS                                                           \
1072     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format",   \
1073       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1074     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1075       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1076     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1077       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1078     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1079       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1080
1081 static const AVOption mpeg1_options[] = {
1082     COMMON_OPTS
1083     FF_MPV_COMMON_OPTS
1084     { NULL },
1085 };
1086
1087 static const AVOption mpeg2_options[] = {
1088     COMMON_OPTS
1089     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1090     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1091     FF_MPV_COMMON_OPTS
1092     { NULL },
1093 };
1094
1095 #define mpeg12_class(x)                                 \
1096 static const AVClass mpeg ## x ## _class = {            \
1097     .class_name = "mpeg" # x "video encoder",           \
1098     .item_name  = av_default_item_name,                 \
1099     .option     = mpeg ## x ## _options,                \
1100     .version    = LIBAVUTIL_VERSION_INT,                \
1101 };
1102
1103 mpeg12_class(1)
1104 mpeg12_class(2)
1105
1106 AVCodec ff_mpeg1video_encoder = {
1107     .name                 = "mpeg1video",
1108     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1109     .type                 = AVMEDIA_TYPE_VIDEO,
1110     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1111     .priv_data_size       = sizeof(MpegEncContext),
1112     .init                 = encode_init,
1113     .encode2              = ff_MPV_encode_picture,
1114     .close                = ff_MPV_encode_end,
1115     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1116     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1117                                                            AV_PIX_FMT_NONE },
1118     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1119     .priv_class           = &mpeg1_class,
1120 };
1121
1122 AVCodec ff_mpeg2video_encoder = {
1123     .name                 = "mpeg2video",
1124     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1125     .type                 = AVMEDIA_TYPE_VIDEO,
1126     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1127     .priv_data_size       = sizeof(MpegEncContext),
1128     .init                 = encode_init,
1129     .encode2              = ff_MPV_encode_picture,
1130     .close                = ff_MPV_encode_end,
1131     .supported_framerates = ff_mpeg2_frame_rate_tab,
1132     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1133                                                            AV_PIX_FMT_YUV422P,
1134                                                            AV_PIX_FMT_NONE },
1135     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1136     .priv_class           = &mpeg2_class,
1137 };