Replace incorrect use of "multiply" with "multiple"
[ffmpeg.git] / 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 "mpegutils.h"
43 #include "mpegvideo.h"
44
45
46 static const uint8_t inv_non_linear_qscale[] = {
47     0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
48 };
49
50 static const uint8_t svcd_scan_offset_placeholder[] = {
51     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
52     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
53 };
54
55 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
56 static uint8_t fcode_tab[MAX_MV * 2 + 1];
57
58 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
59 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
60
61 /* simple include everything table for dc, first byte is bits
62  * number next 3 are code */
63 static uint32_t mpeg1_lum_dc_uni[512];
64 static uint32_t mpeg1_chr_dc_uni[512];
65
66 static uint8_t mpeg1_index_run[2][64];
67 static int8_t  mpeg1_max_level[2][64];
68
69 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
70 {
71     int i;
72
73     for (i = 0; i < 128; i++) {
74         int level = i - 64;
75         int run;
76         if (!level)
77             continue;
78         for (run = 0; run < 64; run++) {
79             int len, code;
80             int alevel = FFABS(level);
81
82             if (alevel > rl->max_level[0][run])
83                 code = 111;                         /* rl->n */
84             else
85                 code = rl->index_run[0][run] + alevel - 1;
86
87             if (code < 111) {                       /* rl->n */
88                 /* length of VLC and sign */
89                 len = rl->table_vlc[code][1] + 1;
90             } else {
91                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
92
93                 if (alevel < 128)
94                     len += 8;
95                 else
96                     len += 16;
97             }
98
99             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
100         }
101     }
102 }
103
104 static int find_frame_rate_index(MpegEncContext *s)
105 {
106     int i;
107     AVRational bestq = (AVRational) {0, 0};
108     AVRational ext;
109     AVRational target = av_inv_q(s->avctx->time_base);
110
111     for (i = 1; i < 14; i++) {
112         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
113             i >= 9)
114             break;
115
116         for (ext.num=1; ext.num <= 4; ext.num++) {
117             for (ext.den=1; ext.den <= 32; ext.den++) {
118                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
119
120                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
121                     continue;
122                 if (av_gcd(ext.den, ext.num) != 1)
123                     continue;
124
125                 if (    bestq.num==0
126                     || av_nearer_q(target, bestq, q) < 0
127                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
128                     bestq               = q;
129                     s->frame_rate_index = i;
130                     s->mpeg2_frame_rate_ext.num = ext.num;
131                     s->mpeg2_frame_rate_ext.den = ext.den;
132                 }
133             }
134         }
135     }
136
137     if (av_cmp_q(target, bestq))
138         return -1;
139     else
140         return 0;
141 }
142
143 static av_cold int encode_init(AVCodecContext *avctx)
144 {
145     MpegEncContext *s = avctx->priv_data;
146
147     if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
148         avctx->thread_count = 1;
149
150     if (ff_mpv_encode_init(avctx) < 0)
151         return -1;
152
153     if (find_frame_rate_index(s) < 0) {
154         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
155             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
156                    avctx->time_base.den, avctx->time_base.num);
157             return -1;
158         } else {
159             av_log(avctx, AV_LOG_INFO,
160                    "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
161                    avctx->time_base.den, avctx->time_base.num);
162         }
163     }
164
165     if (avctx->profile == FF_PROFILE_UNKNOWN) {
166         if (avctx->level != FF_LEVEL_UNKNOWN) {
167             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
168             return -1;
169         }
170         /* Main or 4:2:2 */
171         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
172     }
173
174     if (avctx->level == FF_LEVEL_UNKNOWN) {
175         if (avctx->profile == 0) {                  /* 4:2:2 */
176             if (avctx->width <= 720 && avctx->height <= 608)
177                 avctx->level = 5;                   /* Main */
178             else
179                 avctx->level = 2;                   /* High */
180         } else {
181             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
182                 av_log(avctx, AV_LOG_ERROR,
183                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
184                 return -1;
185             }
186             if (avctx->width <= 720 && avctx->height <= 576)
187                 avctx->level = 8;                   /* Main */
188             else if (avctx->width <= 1440)
189                 avctx->level = 6;                   /* High 1440 */
190             else
191                 avctx->level = 4;                   /* High */
192         }
193     }
194
195     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
196         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
197         return AVERROR(EINVAL);
198     }
199
200     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
201         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
202             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
203                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
204             return AVERROR(EINVAL);
205         }
206     }
207
208     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
209     if (s->drop_frame_timecode)
210         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
211     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
212         av_log(avctx, AV_LOG_ERROR,
213                "Drop frame time code only allowed with 1001/30000 fps\n");
214         return -1;
215     }
216
217     if (s->tc_opt_str) {
218         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
219         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
220         if (ret < 0)
221             return ret;
222         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
223         s->avctx->timecode_frame_start = s->tc.start;
224     } else {
225         s->avctx->timecode_frame_start = 0; // default is -1
226     }
227     return 0;
228 }
229
230 static void put_header(MpegEncContext *s, int header)
231 {
232     avpriv_align_put_bits(&s->pb);
233     put_bits(&s->pb, 16, header >> 16);
234     put_sbits(&s->pb, 16, header);
235 }
236
237 /* put sequence header if needed */
238 static void mpeg1_encode_sequence_header(MpegEncContext *s)
239 {
240     unsigned int vbv_buffer_size, fps, v;
241     int i, constraint_parameter_flag;
242     uint64_t time_code;
243     int64_t best_aspect_error = INT64_MAX;
244     AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
245
246     if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
247         aspect_ratio = (AVRational){1,1};             // pixel aspect 1.1 (VGA)
248
249     if (s->current_picture.f->key_frame) {
250         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
251
252         /* mpeg1 header repeated every gop */
253         put_header(s, SEQ_START_CODE);
254
255         put_sbits(&s->pb, 12, s->width  & 0xFFF);
256         put_sbits(&s->pb, 12, s->height & 0xFFF);
257
258         for (i = 1; i < 15; i++) {
259             int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
260             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
261                 error -= (1LL<<32) / ff_mpeg1_aspect[i];
262             else
263                 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
264
265             error = FFABS(error);
266
267             if (error - 2 <= best_aspect_error) {
268                 best_aspect_error    = error;
269                 s->aspect_ratio_info = i;
270             }
271         }
272
273         put_bits(&s->pb, 4, s->aspect_ratio_info);
274         put_bits(&s->pb, 4, s->frame_rate_index);
275
276         if (s->avctx->rc_max_rate) {
277             v = (s->avctx->rc_max_rate + 399) / 400;
278             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
279                 v = 0x3ffff;
280         } else {
281             v = 0x3FFFF;
282         }
283
284         if (s->avctx->rc_buffer_size)
285             vbv_buffer_size = s->avctx->rc_buffer_size;
286         else
287             /* VBV calculation: Scaled so that a VCD has the proper
288              * VBV size of 40 kilobytes */
289             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
290         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
291
292         put_sbits(&s->pb, 18, v);
293         put_bits(&s->pb, 1, 1);         // marker
294         put_sbits(&s->pb, 10, vbv_buffer_size);
295
296         constraint_parameter_flag =
297             s->width  <= 768                                    &&
298             s->height <= 576                                    &&
299             s->mb_width * s->mb_height                 <= 396   &&
300             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
301             framerate.num <= framerate.den * 30                 &&
302             s->avctx->me_range                                  &&
303             s->avctx->me_range < 128                            &&
304             vbv_buffer_size <= 20                               &&
305             v <= 1856000 / 400                                  &&
306             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
307
308         put_bits(&s->pb, 1, constraint_parameter_flag);
309
310         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
311         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
312
313         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
314             AVFrameSideData *side_data;
315             int width = s->width;
316             int height = s->height;
317             int use_seq_disp_ext;
318
319             put_header(s, EXT_START_CODE);
320             put_bits(&s->pb, 4, 1);                 // seq ext
321
322             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
323
324             put_bits(&s->pb, 3, s->avctx->profile); // profile
325             put_bits(&s->pb, 4, s->avctx->level);   // level
326
327             put_bits(&s->pb, 1, s->progressive_sequence);
328             put_bits(&s->pb, 2, s->chroma_format);
329             put_bits(&s->pb, 2, s->width  >> 12);
330             put_bits(&s->pb, 2, s->height >> 12);
331             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
332             put_bits(&s->pb, 1, 1);                 // marker
333             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
334             put_bits(&s->pb, 1, s->low_delay);
335             put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
336             put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
337
338             side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
339             if (side_data) {
340                 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
341                 if (pan_scan->width && pan_scan->height) {
342                     width = pan_scan->width >> 4;
343                     height = pan_scan->height >> 4;
344                 }
345             }
346
347             use_seq_disp_ext = (width != s->width ||
348                                 height != s->height ||
349                                 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
350                                 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
351                                 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED);
352
353             if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
354                 put_header(s, EXT_START_CODE);
355                 put_bits(&s->pb, 4, 2);                         // sequence display extension
356                 put_bits(&s->pb, 3, 0);                         // video_format: 0 is components
357                 put_bits(&s->pb, 1, 1);                         // colour_description
358                 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
359                 put_bits(&s->pb, 8, s->avctx->color_trc);       // transfer_characteristics
360                 put_bits(&s->pb, 8, s->avctx->colorspace);      // matrix_coefficients
361                 put_bits(&s->pb, 14, width);                    // display_horizontal_size
362                 put_bits(&s->pb, 1, 1);                         // marker_bit
363                 put_bits(&s->pb, 14, height);                   // display_vertical_size
364                 put_bits(&s->pb, 3, 0);                         // remaining 3 bits are zero padding
365             }
366         }
367
368         put_header(s, GOP_START_CODE);
369         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
370         /* time code: we must convert from the real frame rate to a
371          * fake MPEG frame rate in case of low frame rate */
372         fps       = (framerate.num + framerate.den / 2) / framerate.den;
373         time_code = s->current_picture_ptr->f->coded_picture_number +
374                     s->avctx->timecode_frame_start;
375
376         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
377
378         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
379         if (s->drop_frame_timecode)
380             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
381
382         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
383         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
384         put_bits(&s->pb, 1, 1);
385         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
386         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
387         put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
388         put_bits(&s->pb, 1, 0);                     // broken link
389     }
390 }
391
392 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
393 {
394     while (run >= 33) {
395         put_bits(&s->pb, 11, 0x008);
396         run -= 33;
397     }
398     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
399              ff_mpeg12_mbAddrIncrTable[run][0]);
400 }
401
402 static av_always_inline void put_qscale(MpegEncContext *s)
403 {
404     if (s->q_scale_type) {
405         av_assert2(s->qscale >= 1 && s->qscale <= 12);
406         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
407     } else {
408         put_bits(&s->pb, 5, s->qscale);
409     }
410 }
411
412 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
413 {
414     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
415         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
416         /* slice_vertical_position_extension */
417         put_bits(&s->pb, 3, s->mb_y >> 7);
418     } else {
419         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
420     }
421     put_qscale(s);
422     /* slice extra information */
423     put_bits(&s->pb, 1, 0);
424 }
425
426 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
427 {
428     AVFrameSideData *side_data;
429     mpeg1_encode_sequence_header(s);
430
431     /* mpeg1 picture header */
432     put_header(s, PICTURE_START_CODE);
433     /* temporal reference */
434
435     // RAL: s->picture_number instead of s->fake_picture_number
436     put_bits(&s->pb, 10,
437              (s->picture_number - s->gop_picture_number) & 0x3ff);
438     put_bits(&s->pb, 3, s->pict_type);
439
440     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
441     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
442
443     // RAL: Forward f_code also needed for B-frames
444     if (s->pict_type == AV_PICTURE_TYPE_P ||
445         s->pict_type == AV_PICTURE_TYPE_B) {
446         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
447         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
448             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
449         else
450             put_bits(&s->pb, 3, 7);             /* forward_f_code */
451     }
452
453     // RAL: Backward f_code necessary for B-frames
454     if (s->pict_type == AV_PICTURE_TYPE_B) {
455         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
456         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
457             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
458         else
459             put_bits(&s->pb, 3, 7);             /* backward_f_code */
460     }
461
462     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
463
464     s->frame_pred_frame_dct = 1;
465     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
466         put_header(s, EXT_START_CODE);
467         put_bits(&s->pb, 4, 8);                 /* pic ext */
468         if (s->pict_type == AV_PICTURE_TYPE_P ||
469             s->pict_type == AV_PICTURE_TYPE_B) {
470             put_bits(&s->pb, 4, s->f_code);
471             put_bits(&s->pb, 4, s->f_code);
472         } else {
473             put_bits(&s->pb, 8, 255);
474         }
475         if (s->pict_type == AV_PICTURE_TYPE_B) {
476             put_bits(&s->pb, 4, s->b_code);
477             put_bits(&s->pb, 4, s->b_code);
478         } else {
479             put_bits(&s->pb, 8, 255);
480         }
481         put_bits(&s->pb, 2, s->intra_dc_precision);
482
483         av_assert0(s->picture_structure == PICT_FRAME);
484         put_bits(&s->pb, 2, s->picture_structure);
485         if (s->progressive_sequence)
486             put_bits(&s->pb, 1, 0);             /* no repeat */
487         else
488             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
489         /* XXX: optimize the generation of this flag with entropy measures */
490         s->frame_pred_frame_dct = s->progressive_sequence;
491
492         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
493         put_bits(&s->pb, 1, s->concealment_motion_vectors);
494         put_bits(&s->pb, 1, s->q_scale_type);
495         put_bits(&s->pb, 1, s->intra_vlc_format);
496         put_bits(&s->pb, 1, s->alternate_scan);
497         put_bits(&s->pb, 1, s->repeat_first_field);
498         s->progressive_frame = s->progressive_sequence;
499         /* chroma_420_type */
500         put_bits(&s->pb, 1, s->chroma_format ==
501                             CHROMA_420 ? s->progressive_frame : 0);
502         put_bits(&s->pb, 1, s->progressive_frame);
503         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
504     }
505     if (s->scan_offset) {
506         int i;
507
508         put_header(s, USER_START_CODE);
509         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
510             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
511     }
512     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
513                                        AV_FRAME_DATA_STEREO3D);
514     if (side_data) {
515         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
516         uint8_t fpa_type;
517
518         switch (stereo->type) {
519         case AV_STEREO3D_SIDEBYSIDE:
520             fpa_type = 0x03;
521             break;
522         case AV_STEREO3D_TOPBOTTOM:
523             fpa_type = 0x04;
524             break;
525         case AV_STEREO3D_2D:
526             fpa_type = 0x08;
527             break;
528         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
529             fpa_type = 0x23;
530             break;
531         default:
532             fpa_type = 0;
533             break;
534         }
535
536         if (fpa_type != 0) {
537             put_header(s, USER_START_CODE);
538             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
539             put_bits(&s->pb, 8, 'P');
540             put_bits(&s->pb, 8, '3');
541             put_bits(&s->pb, 8, 'D');
542             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
543
544             put_bits(&s->pb, 1, 1);     // reserved_bit
545             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
546             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
547             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
548         }
549     }
550
551     s->mb_y = 0;
552     ff_mpeg1_encode_slice_header(s);
553 }
554
555 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
556                                 int has_mv, int field_motion)
557 {
558     put_bits(&s->pb, n, bits);
559     if (!s->frame_pred_frame_dct) {
560         if (has_mv)
561             /* motion_type: frame/field */
562             put_bits(&s->pb, 2, 2 - field_motion);
563         put_bits(&s->pb, 1, s->interlaced_dct);
564     }
565 }
566
567 // RAL: Parameter added: f_or_b_code
568 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
569 {
570     if (val == 0) {
571         /* zero vector */
572         put_bits(&s->pb,
573                  ff_mpeg12_mbMotionVectorTable[0][1],
574                  ff_mpeg12_mbMotionVectorTable[0][0]);
575     } else {
576         int code, sign, bits;
577         int bit_size = f_or_b_code - 1;
578         int range    = 1 << bit_size;
579         /* modulo encoding */
580         val = sign_extend(val, 5 + bit_size);
581
582         if (val >= 0) {
583             val--;
584             code = (val >> bit_size) + 1;
585             bits = val & (range - 1);
586             sign = 0;
587         } else {
588             val = -val;
589             val--;
590             code = (val >> bit_size) + 1;
591             bits = val & (range - 1);
592             sign = 1;
593         }
594
595         av_assert2(code > 0 && code <= 16);
596
597         put_bits(&s->pb,
598                  ff_mpeg12_mbMotionVectorTable[code][1],
599                  ff_mpeg12_mbMotionVectorTable[code][0]);
600
601         put_bits(&s->pb, 1, sign);
602         if (bit_size > 0)
603             put_bits(&s->pb, bit_size, bits);
604     }
605 }
606
607 static inline void encode_dc(MpegEncContext *s, int diff, int component)
608 {
609     if (((unsigned) (diff + 255)) >= 511) {
610         int index;
611
612         if (diff < 0) {
613             index = av_log2_16bit(-2 * diff);
614             diff--;
615         } else {
616             index = av_log2_16bit(2 * diff);
617         }
618         if (component == 0)
619             put_bits(&s->pb,
620                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
621                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
622                      (diff & ((1 << index) - 1)));
623         else
624             put_bits(&s->pb,
625                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
626                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
627                      (diff & ((1 << index) - 1)));
628     } else {
629         if (component == 0)
630             put_bits(&s->pb,
631                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
632                      mpeg1_lum_dc_uni[diff + 255] >> 8);
633         else
634             put_bits(&s->pb,
635                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
636                      mpeg1_chr_dc_uni[diff + 255] >> 8);
637     }
638 }
639
640 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
641 {
642     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
643     int code, component;
644     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
645
646     last_index = s->block_last_index[n];
647
648     /* DC coef */
649     if (s->mb_intra) {
650         component = (n <= 3 ? 0 : (n & 1) + 1);
651         dc        = block[0];                   /* overflow is impossible */
652         diff      = dc - s->last_dc[component];
653         encode_dc(s, diff, component);
654         s->last_dc[component] = dc;
655         i = 1;
656         if (s->intra_vlc_format)
657             table_vlc = ff_rl_mpeg2.table_vlc;
658     } else {
659         /* encode the first coefficient: needs to be done here because
660          * it is handled slightly differently */
661         level = block[0];
662         if (abs(level) == 1) {
663             code = ((uint32_t)level >> 31);     /* the sign bit */
664             put_bits(&s->pb, 2, code | 0x02);
665             i = 1;
666         } else {
667             i             = 0;
668             last_non_zero = -1;
669             goto next_coef;
670         }
671     }
672
673     /* now quantify & encode AC coefs */
674     last_non_zero = i - 1;
675
676     for (; i <= last_index; i++) {
677         j     = s->intra_scantable.permutated[i];
678         level = block[j];
679
680 next_coef:
681         /* encode using VLC */
682         if (level != 0) {
683             run = i - last_non_zero - 1;
684
685             alevel = level;
686             MASK_ABS(sign, alevel);
687             sign &= 1;
688
689             if (alevel <= mpeg1_max_level[0][run]) {
690                 code = mpeg1_index_run[0][run] + alevel - 1;
691                 /* store the VLC & sign at once */
692                 put_bits(&s->pb, table_vlc[code][1] + 1,
693                          (table_vlc[code][0] << 1) + sign);
694             } else {
695                 /* escape seems to be pretty rare <5% so I do not optimize it */
696                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
697                 /* escape: only clip in this case */
698                 put_bits(&s->pb, 6, run);
699                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
700                     if (alevel < 128) {
701                         put_sbits(&s->pb, 8, level);
702                     } else {
703                         if (level < 0)
704                             put_bits(&s->pb, 16, 0x8001 + level + 255);
705                         else
706                             put_sbits(&s->pb, 16, level);
707                     }
708                 } else {
709                     put_sbits(&s->pb, 12, level);
710                 }
711             }
712             last_non_zero = i;
713         }
714     }
715     /* end of block */
716     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
717 }
718
719 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
720                                                       int16_t block[8][64],
721                                                       int motion_x, int motion_y,
722                                                       int mb_block_count)
723 {
724     int i, cbp;
725     const int mb_x     = s->mb_x;
726     const int mb_y     = s->mb_y;
727     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
728
729     /* compute cbp */
730     cbp = 0;
731     for (i = 0; i < mb_block_count; i++)
732         if (s->block_last_index[i] >= 0)
733             cbp |= 1 << (mb_block_count - 1 - i);
734
735     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
736         (mb_x != s->mb_width - 1 ||
737          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
738         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
739          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
740           (((s->mv_dir & MV_DIR_FORWARD)
741             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
742                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
743            ((s->mv_dir & MV_DIR_BACKWARD)
744             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
745                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
746         s->mb_skip_run++;
747         s->qscale -= s->dquant;
748         s->skip_count++;
749         s->misc_bits++;
750         s->last_bits++;
751         if (s->pict_type == AV_PICTURE_TYPE_P) {
752             s->last_mv[0][0][0] =
753             s->last_mv[0][0][1] =
754             s->last_mv[0][1][0] =
755             s->last_mv[0][1][1] = 0;
756         }
757     } else {
758         if (first_mb) {
759             av_assert0(s->mb_skip_run == 0);
760             encode_mb_skip_run(s, s->mb_x);
761         } else {
762             encode_mb_skip_run(s, s->mb_skip_run);
763         }
764
765         if (s->pict_type == AV_PICTURE_TYPE_I) {
766             if (s->dquant && cbp) {
767                 /* macroblock_type: macroblock_quant = 1 */
768                 put_mb_modes(s, 2, 1, 0, 0);
769                 put_qscale(s);
770             } else {
771                 /* macroblock_type: macroblock_quant = 0 */
772                 put_mb_modes(s, 1, 1, 0, 0);
773                 s->qscale -= s->dquant;
774             }
775             s->misc_bits += get_bits_diff(s);
776             s->i_count++;
777         } else if (s->mb_intra) {
778             if (s->dquant && cbp) {
779                 put_mb_modes(s, 6, 0x01, 0, 0);
780                 put_qscale(s);
781             } else {
782                 put_mb_modes(s, 5, 0x03, 0, 0);
783                 s->qscale -= s->dquant;
784             }
785             s->misc_bits += get_bits_diff(s);
786             s->i_count++;
787             memset(s->last_mv, 0, sizeof(s->last_mv));
788         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
789             if (s->mv_type == MV_TYPE_16X16) {
790                 if (cbp != 0) {
791                     if ((motion_x | motion_y) == 0) {
792                         if (s->dquant) {
793                             /* macroblock_pattern & quant */
794                             put_mb_modes(s, 5, 1, 0, 0);
795                             put_qscale(s);
796                         } else {
797                             /* macroblock_pattern only */
798                             put_mb_modes(s, 2, 1, 0, 0);
799                         }
800                         s->misc_bits += get_bits_diff(s);
801                     } else {
802                         if (s->dquant) {
803                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
804                             put_qscale(s);
805                         } else {
806                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
807                         }
808                         s->misc_bits += get_bits_diff(s);
809                         // RAL: f_code parameter added
810                         mpeg1_encode_motion(s,
811                                             motion_x - s->last_mv[0][0][0],
812                                             s->f_code);
813                         // RAL: f_code parameter added
814                         mpeg1_encode_motion(s,
815                                             motion_y - s->last_mv[0][0][1],
816                                             s->f_code);
817                         s->mv_bits += get_bits_diff(s);
818                     }
819                 } else {
820                     put_bits(&s->pb, 3, 1);         /* motion only */
821                     if (!s->frame_pred_frame_dct)
822                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
823                     s->misc_bits += get_bits_diff(s);
824                     // RAL: f_code parameter added
825                     mpeg1_encode_motion(s,
826                                         motion_x - s->last_mv[0][0][0],
827                                         s->f_code);
828                     // RAL: f_code parameter added
829                     mpeg1_encode_motion(s,
830                                         motion_y - s->last_mv[0][0][1],
831                                         s->f_code);
832                     s->qscale  -= s->dquant;
833                     s->mv_bits += get_bits_diff(s);
834                 }
835                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
836                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
837             } else {
838                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
839
840                 if (cbp) {
841                     if (s->dquant) {
842                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
843                         put_qscale(s);
844                     } else {
845                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
846                     }
847                 } else {
848                     put_bits(&s->pb, 3, 1);             /* motion only */
849                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
850                     s->qscale -= s->dquant;
851                 }
852                 s->misc_bits += get_bits_diff(s);
853                 for (i = 0; i < 2; i++) {
854                     put_bits(&s->pb, 1, s->field_select[0][i]);
855                     mpeg1_encode_motion(s,
856                                         s->mv[0][i][0] - s->last_mv[0][i][0],
857                                         s->f_code);
858                     mpeg1_encode_motion(s,
859                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
860                                         s->f_code);
861                     s->last_mv[0][i][0] = s->mv[0][i][0];
862                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
863                 }
864                 s->mv_bits += get_bits_diff(s);
865             }
866             if (cbp) {
867                 if (s->chroma_y_shift) {
868                     put_bits(&s->pb,
869                              ff_mpeg12_mbPatTable[cbp][1],
870                              ff_mpeg12_mbPatTable[cbp][0]);
871                 } else {
872                     put_bits(&s->pb,
873                              ff_mpeg12_mbPatTable[cbp >> 2][1],
874                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
875                     put_sbits(&s->pb, 2, cbp);
876                 }
877             }
878             s->f_count++;
879         } else {
880             if (s->mv_type == MV_TYPE_16X16) {
881                 if (cbp) {                      // With coded bloc pattern
882                     if (s->dquant) {
883                         if (s->mv_dir == MV_DIR_FORWARD)
884                             put_mb_modes(s, 6, 3, 1, 0);
885                         else
886                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
887                         put_qscale(s);
888                     } else {
889                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
890                     }
891                 } else {                        // No coded bloc pattern
892                     put_bits(&s->pb, 5 - s->mv_dir, 2);
893                     if (!s->frame_pred_frame_dct)
894                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
895                     s->qscale -= s->dquant;
896                 }
897                 s->misc_bits += get_bits_diff(s);
898                 if (s->mv_dir & MV_DIR_FORWARD) {
899                     mpeg1_encode_motion(s,
900                                         s->mv[0][0][0] - s->last_mv[0][0][0],
901                                         s->f_code);
902                     mpeg1_encode_motion(s,
903                                         s->mv[0][0][1] - s->last_mv[0][0][1],
904                                         s->f_code);
905                     s->last_mv[0][0][0] =
906                     s->last_mv[0][1][0] = s->mv[0][0][0];
907                     s->last_mv[0][0][1] =
908                     s->last_mv[0][1][1] = s->mv[0][0][1];
909                     s->f_count++;
910                 }
911                 if (s->mv_dir & MV_DIR_BACKWARD) {
912                     mpeg1_encode_motion(s,
913                                         s->mv[1][0][0] - s->last_mv[1][0][0],
914                                         s->b_code);
915                     mpeg1_encode_motion(s,
916                                         s->mv[1][0][1] - s->last_mv[1][0][1],
917                                         s->b_code);
918                     s->last_mv[1][0][0] =
919                     s->last_mv[1][1][0] = s->mv[1][0][0];
920                     s->last_mv[1][0][1] =
921                     s->last_mv[1][1][1] = s->mv[1][0][1];
922                     s->b_count++;
923                 }
924             } else {
925                 av_assert2(s->mv_type == MV_TYPE_FIELD);
926                 av_assert2(!s->frame_pred_frame_dct);
927                 if (cbp) {                      // With coded bloc pattern
928                     if (s->dquant) {
929                         if (s->mv_dir == MV_DIR_FORWARD)
930                             put_mb_modes(s, 6, 3, 1, 1);
931                         else
932                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
933                         put_qscale(s);
934                     } else {
935                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
936                     }
937                 } else {                        // No coded bloc pattern
938                     put_bits(&s->pb, 5 - s->mv_dir, 2);
939                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
940                     s->qscale -= s->dquant;
941                 }
942                 s->misc_bits += get_bits_diff(s);
943                 if (s->mv_dir & MV_DIR_FORWARD) {
944                     for (i = 0; i < 2; i++) {
945                         put_bits(&s->pb, 1, s->field_select[0][i]);
946                         mpeg1_encode_motion(s,
947                                             s->mv[0][i][0] - s->last_mv[0][i][0],
948                                             s->f_code);
949                         mpeg1_encode_motion(s,
950                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
951                                             s->f_code);
952                         s->last_mv[0][i][0] = s->mv[0][i][0];
953                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
954                     }
955                     s->f_count++;
956                 }
957                 if (s->mv_dir & MV_DIR_BACKWARD) {
958                     for (i = 0; i < 2; i++) {
959                         put_bits(&s->pb, 1, s->field_select[1][i]);
960                         mpeg1_encode_motion(s,
961                                             s->mv[1][i][0] - s->last_mv[1][i][0],
962                                             s->b_code);
963                         mpeg1_encode_motion(s,
964                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
965                                             s->b_code);
966                         s->last_mv[1][i][0] = s->mv[1][i][0];
967                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
968                     }
969                     s->b_count++;
970                 }
971             }
972             s->mv_bits += get_bits_diff(s);
973             if (cbp) {
974                 if (s->chroma_y_shift) {
975                     put_bits(&s->pb,
976                              ff_mpeg12_mbPatTable[cbp][1],
977                              ff_mpeg12_mbPatTable[cbp][0]);
978                 } else {
979                     put_bits(&s->pb,
980                              ff_mpeg12_mbPatTable[cbp >> 2][1],
981                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
982                     put_sbits(&s->pb, 2, cbp);
983                 }
984             }
985         }
986         for (i = 0; i < mb_block_count; i++)
987             if (cbp & (1 << (mb_block_count - 1 - i)))
988                 mpeg1_encode_block(s, block[i], i);
989         s->mb_skip_run = 0;
990         if (s->mb_intra)
991             s->i_tex_bits += get_bits_diff(s);
992         else
993             s->p_tex_bits += get_bits_diff(s);
994     }
995 }
996
997 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
998                         int motion_x, int motion_y)
999 {
1000     if (s->chroma_format == CHROMA_420)
1001         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1002     else
1003         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1004 }
1005
1006 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1007 {
1008     static int done = 0;
1009
1010     ff_mpeg12_common_init(s);
1011
1012     if (!done) {
1013         int f_code;
1014         int mv;
1015         int i;
1016
1017         done = 1;
1018         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1019         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1020
1021         for (i = 0; i < 64; i++) {
1022             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1023             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1024         }
1025
1026         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1027         if (s->intra_vlc_format)
1028             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1029
1030         /* build unified dc encoding tables */
1031         for (i = -255; i < 256; i++) {
1032             int adiff, index;
1033             int bits, code;
1034             int diff = i;
1035
1036             adiff = FFABS(diff);
1037             if (diff < 0)
1038                 diff--;
1039             index = av_log2(2 * adiff);
1040
1041             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1042             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1043                    (diff & ((1 << index) - 1));
1044             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1045
1046             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1047             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1048                    (diff & ((1 << index) - 1));
1049             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1050         }
1051
1052         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1053             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1054                 int len;
1055
1056                 if (mv == 0) {
1057                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1058                 } else {
1059                     int val, bit_size, code;
1060
1061                     bit_size = f_code - 1;
1062
1063                     val = mv;
1064                     if (val < 0)
1065                         val = -val;
1066                     val--;
1067                     code = (val >> bit_size) + 1;
1068                     if (code < 17)
1069                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1070                               1 + bit_size;
1071                     else
1072                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1073                               2 + bit_size;
1074                 }
1075
1076                 mv_penalty[f_code][mv + MAX_MV] = len;
1077             }
1078
1079
1080         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1081             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1082                 fcode_tab[mv + MAX_MV] = f_code;
1083     }
1084     s->me.mv_penalty = mv_penalty;
1085     s->fcode_tab     = fcode_tab;
1086     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1087         s->min_qcoeff = -255;
1088         s->max_qcoeff = 255;
1089     } else {
1090         s->min_qcoeff = -2047;
1091         s->max_qcoeff = 2047;
1092     }
1093     if (s->intra_vlc_format) {
1094         s->intra_ac_vlc_length      =
1095         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1096     } else {
1097         s->intra_ac_vlc_length      =
1098         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1099     }
1100     s->inter_ac_vlc_length      =
1101     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1102 }
1103
1104 #define OFFSET(x) offsetof(MpegEncContext, x)
1105 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1106 #define COMMON_OPTS                                                           \
1107     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format",   \
1108       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1109     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1110       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1111     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1112       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1113     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1114       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1115
1116 static const AVOption mpeg1_options[] = {
1117     COMMON_OPTS
1118     FF_MPV_COMMON_OPTS
1119     { NULL },
1120 };
1121
1122 static const AVOption mpeg2_options[] = {
1123     COMMON_OPTS
1124     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1125     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1126     { "seq_disp_ext",     "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1127     {     "auto",   NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = -1},  0, 0, VE, "seq_disp_ext" },
1128     {     "never",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 0 },  0, 0, VE, "seq_disp_ext" },
1129     {     "always", NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 1 },  0, 0, VE, "seq_disp_ext" },
1130     FF_MPV_COMMON_OPTS
1131     { NULL },
1132 };
1133
1134 #define mpeg12_class(x)                                 \
1135 static const AVClass mpeg ## x ## _class = {            \
1136     .class_name = "mpeg" # x "video encoder",           \
1137     .item_name  = av_default_item_name,                 \
1138     .option     = mpeg ## x ## _options,                \
1139     .version    = LIBAVUTIL_VERSION_INT,                \
1140 };
1141
1142 mpeg12_class(1)
1143 mpeg12_class(2)
1144
1145 AVCodec ff_mpeg1video_encoder = {
1146     .name                 = "mpeg1video",
1147     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1148     .type                 = AVMEDIA_TYPE_VIDEO,
1149     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1150     .priv_data_size       = sizeof(MpegEncContext),
1151     .init                 = encode_init,
1152     .encode2              = ff_mpv_encode_picture,
1153     .close                = ff_mpv_encode_end,
1154     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1155     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1156                                                            AV_PIX_FMT_NONE },
1157     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1158     .priv_class           = &mpeg1_class,
1159 };
1160
1161 AVCodec ff_mpeg2video_encoder = {
1162     .name                 = "mpeg2video",
1163     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1164     .type                 = AVMEDIA_TYPE_VIDEO,
1165     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1166     .priv_data_size       = sizeof(MpegEncContext),
1167     .init                 = encode_init,
1168     .encode2              = ff_mpv_encode_picture,
1169     .close                = ff_mpv_encode_end,
1170     .supported_framerates = ff_mpeg2_frame_rate_tab,
1171     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1172                                                            AV_PIX_FMT_YUV422P,
1173                                                            AV_PIX_FMT_NONE },
1174     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1175     .priv_class           = &mpeg2_class,
1176 };