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->avctx->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     unsigned int diff_u = diff + 255;
 550     if (diff_u >= 511) {
 551         int index;
 552
 553         if (diff < 0) {
 554             index = av_log2_16bit(-2 * diff);
 555             diff--;
 556         } else {
 557             index = av_log2_16bit(2 * diff);
 558         }
 559         if (component == 0)
 560             put_bits(&s->pb,
 561                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 562                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 563                      (diff & ((1 << index) - 1)));
 564         else
 565             put_bits(&s->pb,
 566                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 567                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 568                      (diff & ((1 << index) - 1)));
 569     } else {
 570         if (component == 0)
 571             put_bits(&s->pb,
 572                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 573                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 574         else
 575             put_bits(&s->pb,
 576                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 577                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 578     }
 579 }
 580
 581 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 582 {
 583     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 584     int code, component;
 585     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 586
 587     last_index = s->block_last_index[n];
 588
 589     /* DC coef */
 590     if (s->mb_intra) {
 591         component = (n <= 3 ? 0 : (n & 1) + 1);
 592         dc        = block[0];                   /* overflow is impossible */
 593         diff      = dc - s->last_dc[component];
 594         encode_dc(s, diff, component);
 595         s->last_dc[component] = dc;
 596         i = 1;
 597         if (s->intra_vlc_format)
 598             table_vlc = ff_rl_mpeg2.table_vlc;
 599     } else {
 600         /* encode the first coefficient: needs to be done here because
 601          * it is handled slightly differently */
 602         level = block[0];
 603         if (abs(level) == 1) {
 604             code = ((uint32_t)level >> 31);     /* the sign bit */
 605             put_bits(&s->pb, 2, code | 0x02);
 606             i = 1;
 607         } else {
 608             i             = 0;
 609             last_non_zero = -1;
 610             goto next_coef;
 611         }
 612     }
 613
 614     /* now quantify & encode AC coefs */
 615     last_non_zero = i - 1;
 616
 617     for (; i <= last_index; i++) {
 618         j     = s->intra_scantable.permutated[i];
 619         level = block[j];
 620
 621 next_coef:
 622         /* encode using VLC */
 623         if (level != 0) {
 624             run = i - last_non_zero - 1;
 625
 626             alevel = level;
 627             MASK_ABS(sign, alevel);
 628             sign &= 1;
 629
 630             if (alevel <= mpeg1_max_level[0][run]) {
 631                 code = mpeg1_index_run[0][run] + alevel - 1;
 632                 /* store the VLC & sign at once */
 633                 put_bits(&s->pb, table_vlc[code][1] + 1,
 634                          (table_vlc[code][0] << 1) + sign);
 635             } else {
 636                 /* escape seems to be pretty rare <5% so I do not optimize it */
 637                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 638                 /* escape: only clip in this case */
 639                 put_bits(&s->pb, 6, run);
 640                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 641                     if (alevel < 128) {
 642                         put_sbits(&s->pb, 8, level);
 643                     } else {
 644                         if (level < 0)
 645                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 646                         else
 647                             put_sbits(&s->pb, 16, level);
 648                     }
 649                 } else {
 650                     put_sbits(&s->pb, 12, level);
 651                 }
 652             }
 653             last_non_zero = i;
 654         }
 655     }
 656     /* end of block */
 657     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 658 }
 659
 660 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 661                                                       int16_t block[8][64],
 662                                                       int motion_x, int motion_y,
 663                                                       int mb_block_count)
 664 {
 665     int i, cbp;
 666     const int mb_x     = s->mb_x;
 667     const int mb_y     = s->mb_y;
 668     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 669
 670     /* compute cbp */
 671     cbp = 0;
 672     for (i = 0; i < mb_block_count; i++)
 673         if (s->block_last_index[i] >= 0)
 674             cbp |= 1 << (mb_block_count - 1 - i);
 675
 676     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 677         (mb_x != s->mb_width - 1 ||
 678          (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 679         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 680          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 681           (((s->mv_dir & MV_DIR_FORWARD)
 682             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 683                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 684            ((s->mv_dir & MV_DIR_BACKWARD)
 685             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 686                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 687         s->mb_skip_run++;
 688         s->qscale -= s->dquant;
 689         s->skip_count++;
 690         s->misc_bits++;
 691         s->last_bits++;
 692         if (s->pict_type == AV_PICTURE_TYPE_P) {
 693             s->last_mv[0][0][0] =
 694             s->last_mv[0][0][1] =
 695             s->last_mv[0][1][0] =
 696             s->last_mv[0][1][1] = 0;
 697         }
 698     } else {
 699         if (first_mb) {
 700             assert(s->mb_skip_run == 0);
 701             encode_mb_skip_run(s, s->mb_x);
 702         } else {
 703             encode_mb_skip_run(s, s->mb_skip_run);
 704         }
 705
 706         if (s->pict_type == AV_PICTURE_TYPE_I) {
 707             if (s->dquant && cbp) {
 708                 /* macroblock_type: macroblock_quant = 1 */
 709                 put_mb_modes(s, 2, 1, 0, 0);
 710                 put_qscale(s);
 711             } else {
 712                 /* macroblock_type: macroblock_quant = 0 */
 713                 put_mb_modes(s, 1, 1, 0, 0);
 714                 s->qscale -= s->dquant;
 715             }
 716             s->misc_bits += get_bits_diff(s);
 717             s->i_count++;
 718         } else if (s->mb_intra) {
 719             if (s->dquant && cbp) {
 720                 put_mb_modes(s, 6, 0x01, 0, 0);
 721                 put_qscale(s);
 722             } else {
 723                 put_mb_modes(s, 5, 0x03, 0, 0);
 724                 s->qscale -= s->dquant;
 725             }
 726             s->misc_bits += get_bits_diff(s);
 727             s->i_count++;
 728             memset(s->last_mv, 0, sizeof(s->last_mv));
 729         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 730             if (s->mv_type == MV_TYPE_16X16) {
 731                 if (cbp != 0) {
 732                     if ((motion_x | motion_y) == 0) {
 733                         if (s->dquant) {
 734                             /* macroblock_pattern & quant */
 735                             put_mb_modes(s, 5, 1, 0, 0);
 736                             put_qscale(s);
 737                         } else {
 738                             /* macroblock_pattern only */
 739                             put_mb_modes(s, 2, 1, 0, 0);
 740                         }
 741                         s->misc_bits += get_bits_diff(s);
 742                     } else {
 743                         if (s->dquant) {
 744                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 745                             put_qscale(s);
 746                         } else {
 747                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 748                         }
 749                         s->misc_bits += get_bits_diff(s);
 750                         // RAL: f_code parameter added
 751                         mpeg1_encode_motion(s,
 752                                             motion_x - s->last_mv[0][0][0],
 753                                             s->f_code);
 754                         // RAL: f_code parameter added
 755                         mpeg1_encode_motion(s,
 756                                             motion_y - s->last_mv[0][0][1],
 757                                             s->f_code);
 758                         s->mv_bits += get_bits_diff(s);
 759                     }
 760                 } else {
 761                     put_bits(&s->pb, 3, 1);         /* motion only */
 762                     if (!s->frame_pred_frame_dct)
 763                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 764                     s->misc_bits += get_bits_diff(s);
 765                     // RAL: f_code parameter added
 766                     mpeg1_encode_motion(s,
 767                                         motion_x - s->last_mv[0][0][0],
 768                                         s->f_code);
 769                     // RAL: f_code parameter added
 770                     mpeg1_encode_motion(s,
 771                                         motion_y - s->last_mv[0][0][1],
 772                                         s->f_code);
 773                     s->qscale  -= s->dquant;
 774                     s->mv_bits += get_bits_diff(s);
 775                 }
 776                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 777                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 778             } else {
 779                 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 780
 781                 if (cbp) {
 782                     if (s->dquant) {
 783                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 784                         put_qscale(s);
 785                     } else {
 786                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 787                     }
 788                 } else {
 789                     put_bits(&s->pb, 3, 1);             /* motion only */
 790                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 791                     s->qscale -= s->dquant;
 792                 }
 793                 s->misc_bits += get_bits_diff(s);
 794                 for (i = 0; i < 2; i++) {
 795                     put_bits(&s->pb, 1, s->field_select[0][i]);
 796                     mpeg1_encode_motion(s,
 797                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 798                                         s->f_code);
 799                     mpeg1_encode_motion(s,
 800                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 801                                         s->f_code);
 802                     s->last_mv[0][i][0] = s->mv[0][i][0];
 803                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 804                 }
 805                 s->mv_bits += get_bits_diff(s);
 806             }
 807             if (cbp) {
 808                 if (s->chroma_y_shift) {
 809                     put_bits(&s->pb,
 810                              ff_mpeg12_mbPatTable[cbp][1],
 811                              ff_mpeg12_mbPatTable[cbp][0]);
 812                 } else {
 813                     put_bits(&s->pb,
 814                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 815                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 816                     put_sbits(&s->pb, 2, cbp);
 817                 }
 818             }
 819             s->f_count++;
 820         } else {
 821             if (s->mv_type == MV_TYPE_16X16) {
 822                 if (cbp) {                      // With coded bloc pattern
 823                     if (s->dquant) {
 824                         if (s->mv_dir == MV_DIR_FORWARD)
 825                             put_mb_modes(s, 6, 3, 1, 0);
 826                         else
 827                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 828                         put_qscale(s);
 829                     } else {
 830                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 831                     }
 832                 } else {                        // No coded bloc pattern
 833                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 834                     if (!s->frame_pred_frame_dct)
 835                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 836                     s->qscale -= s->dquant;
 837                 }
 838                 s->misc_bits += get_bits_diff(s);
 839                 if (s->mv_dir & MV_DIR_FORWARD) {
 840                     mpeg1_encode_motion(s,
 841                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 842                                         s->f_code);
 843                     mpeg1_encode_motion(s,
 844                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 845                                         s->f_code);
 846                     s->last_mv[0][0][0] =
 847                     s->last_mv[0][1][0] = s->mv[0][0][0];
 848                     s->last_mv[0][0][1] =
 849                     s->last_mv[0][1][1] = s->mv[0][0][1];
 850                     s->f_count++;
 851                 }
 852                 if (s->mv_dir & MV_DIR_BACKWARD) {
 853                     mpeg1_encode_motion(s,
 854                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 855                                         s->b_code);
 856                     mpeg1_encode_motion(s,
 857                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 858                                         s->b_code);
 859                     s->last_mv[1][0][0] =
 860                     s->last_mv[1][1][0] = s->mv[1][0][0];
 861                     s->last_mv[1][0][1] =
 862                     s->last_mv[1][1][1] = s->mv[1][0][1];
 863                     s->b_count++;
 864                 }
 865             } else {
 866                 assert(s->mv_type == MV_TYPE_FIELD);
 867                 assert(!s->frame_pred_frame_dct);
 868                 if (cbp) {                      // With coded bloc pattern
 869                     if (s->dquant) {
 870                         if (s->mv_dir == MV_DIR_FORWARD)
 871                             put_mb_modes(s, 6, 3, 1, 1);
 872                         else
 873                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 874                         put_qscale(s);
 875                     } else {
 876                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 877                     }
 878                 } else {                        // No coded bloc pattern
 879                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 880                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 881                     s->qscale -= s->dquant;
 882                 }
 883                 s->misc_bits += get_bits_diff(s);
 884                 if (s->mv_dir & MV_DIR_FORWARD) {
 885                     for (i = 0; i < 2; i++) {
 886                         put_bits(&s->pb, 1, s->field_select[0][i]);
 887                         mpeg1_encode_motion(s,
 888                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 889                                             s->f_code);
 890                         mpeg1_encode_motion(s,
 891                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 892                                             s->f_code);
 893                         s->last_mv[0][i][0] = s->mv[0][i][0];
 894                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 895                     }
 896                     s->f_count++;
 897                 }
 898                 if (s->mv_dir & MV_DIR_BACKWARD) {
 899                     for (i = 0; i < 2; i++) {
 900                         put_bits(&s->pb, 1, s->field_select[1][i]);
 901                         mpeg1_encode_motion(s,
 902                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 903                                             s->b_code);
 904                         mpeg1_encode_motion(s,
 905                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 906                                             s->b_code);
 907                         s->last_mv[1][i][0] = s->mv[1][i][0];
 908                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 909                     }
 910                     s->b_count++;
 911                 }
 912             }
 913             s->mv_bits += get_bits_diff(s);
 914             if (cbp) {
 915                 if (s->chroma_y_shift) {
 916                     put_bits(&s->pb,
 917                              ff_mpeg12_mbPatTable[cbp][1],
 918                              ff_mpeg12_mbPatTable[cbp][0]);
 919                 } else {
 920                     put_bits(&s->pb,
 921                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 922                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 923                     put_sbits(&s->pb, 2, cbp);
 924                 }
 925             }
 926         }
 927         for (i = 0; i < mb_block_count; i++)
 928             if (cbp & (1 << (mb_block_count - 1 - i)))
 929                 mpeg1_encode_block(s, block[i], i);
 930         s->mb_skip_run = 0;
 931         if (s->mb_intra)
 932             s->i_tex_bits += get_bits_diff(s);
 933         else
 934             s->p_tex_bits += get_bits_diff(s);
 935     }
 936 }
 937
 938 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
 939                         int motion_x, int motion_y)
 940 {
 941     if (s->chroma_format == CHROMA_420)
 942         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
 943     else
 944         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
 945 }
 946
 947 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
 948 {
 949     static int done = 0;
 950
 951     ff_mpeg12_common_init(s);
 952
 953     if (!done) {
 954         int f_code;
 955         int mv;
 956         int i;
 957
 958         done = 1;
 959         ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
 960         ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
 961
 962         for (i = 0; i < 64; i++) {
 963             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
 964             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
 965         }
 966
 967         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
 968         if (s->intra_vlc_format)
 969             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
 970
 971         /* build unified dc encoding tables */
 972         for (i = -255; i < 256; i++) {
 973             int adiff, index;
 974             int bits, code;
 975             int diff = i;
 976
 977             adiff = FFABS(diff);
 978             if (diff < 0)
 979                 diff--;
 980             index = av_log2(2 * adiff);
 981
 982             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
 983             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 984                    (diff & ((1 << index) - 1));
 985             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
 986
 987             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
 988             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 989                    (diff & ((1 << index) - 1));
 990             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
 991         }
 992
 993         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
 994             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
 995                 int len;
 996
 997                 if (mv == 0) {
 998                     len = ff_mpeg12_mbMotionVectorTable[0][1];
 999                 } else {
1000                     int val, bit_size, code;
1001
1002                     bit_size = f_code - 1;
1003
1004                     val = mv;
1005                     if (val < 0)
1006                         val = -val;
1007                     val--;
1008                     code = (val >> bit_size) + 1;
1009                     if (code < 17)
1010                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1011                               1 + bit_size;
1012                     else
1013                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1014                               2 + bit_size;
1015                 }
1016
1017                 mv_penalty[f_code][mv + MAX_MV] = len;
1018             }
1019
1020
1021         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1022             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1023                 fcode_tab[mv + MAX_MV] = f_code;
1024     }
1025     s->me.mv_penalty = mv_penalty;
1026     s->fcode_tab     = fcode_tab;
1027     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1028         s->min_qcoeff = -255;
1029         s->max_qcoeff = 255;
1030     } else {
1031         s->min_qcoeff = -2047;
1032         s->max_qcoeff = 2047;
1033     }
1034     if (s->intra_vlc_format) {
1035         s->intra_ac_vlc_length      =
1036         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1037     } else {
1038         s->intra_ac_vlc_length      =
1039         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1040     }
1041     s->inter_ac_vlc_length      =
1042     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1043 }
1044
1045 #define OFFSET(x) offsetof(MpegEncContext, x)
1046 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1047 #define COMMON_OPTS                                                           \
1048     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1049       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1050     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1051       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1052     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1053       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1054
1055 static const AVOption mpeg1_options[] = {
1056     COMMON_OPTS
1057     FF_MPV_COMMON_OPTS
1058     { NULL },
1059 };
1060
1061 static const AVOption mpeg2_options[] = {
1062     COMMON_OPTS
1063     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1064     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1065     FF_MPV_COMMON_OPTS
1066     { NULL },
1067 };
1068
1069 #define mpeg12_class(x)                                 \
1070 static const AVClass mpeg ## x ## _class = {            \
1071     .class_name = "mpeg" # x "video encoder",           \
1072     .item_name  = av_default_item_name,                 \
1073     .option     = mpeg ## x ## _options,                \
1074     .version    = LIBAVUTIL_VERSION_INT,                \
1075 };
1076
1077 mpeg12_class(1)
1078 mpeg12_class(2)
1079
1080 AVCodec ff_mpeg1video_encoder = {
1081     .name                 = "mpeg1video",
1082     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1083     .type                 = AVMEDIA_TYPE_VIDEO,
1084     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1085     .priv_data_size       = sizeof(MpegEncContext),
1086     .init                 = encode_init,
1087     .encode2              = ff_mpv_encode_picture,
1088     .close                = ff_mpv_encode_end,
1089     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1090     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1091                                                            AV_PIX_FMT_NONE },
1092     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1093     .priv_class           = &mpeg1_class,
1094 };
1095
1096 AVCodec ff_mpeg2video_encoder = {
1097     .name                 = "mpeg2video",
1098     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1099     .type                 = AVMEDIA_TYPE_VIDEO,
1100     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1101     .priv_data_size       = sizeof(MpegEncContext),
1102     .init                 = encode_init,
1103     .encode2              = ff_mpv_encode_picture,
1104     .close                = ff_mpv_encode_end,
1105     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1106     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1107                                                            AV_PIX_FMT_YUV422P,
1108                                                            AV_PIX_FMT_NONE },
1109     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1110     .priv_class           = &mpeg2_class,
1111 };