speedhq: fix decoding artifacts
[ffmpeg.git] / libavcodec / mpeg12enc.c
1 /*
2  * MPEG-1/2 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  * MPEG-1/2 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 static const uint8_t svcd_scan_offset_placeholder[] = {
46     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
47     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
48 };
49
50 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
51 static uint8_t fcode_tab[MAX_MV * 2 + 1];
52
53 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
54 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
55
56 /* simple include everything table for dc, first byte is bits
57  * number next 3 are code */
58 static uint32_t mpeg1_lum_dc_uni[512];
59 static uint32_t mpeg1_chr_dc_uni[512];
60
61 static uint8_t mpeg1_index_run[2][64];
62 static int8_t  mpeg1_max_level[2][64];
63
64 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
65 {
66     int i;
67
68     for (i = 0; i < 128; i++) {
69         int level = i - 64;
70         int run;
71         if (!level)
72             continue;
73         for (run = 0; run < 64; run++) {
74             int len, code;
75             int alevel = FFABS(level);
76
77             if (alevel > rl->max_level[0][run])
78                 code = 111;                         /* rl->n */
79             else
80                 code = rl->index_run[0][run] + alevel - 1;
81
82             if (code < 111) {                       /* rl->n */
83                 /* length of VLC and sign */
84                 len = rl->table_vlc[code][1] + 1;
85             } else {
86                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
87
88                 if (alevel < 128)
89                     len += 8;
90                 else
91                     len += 16;
92             }
93
94             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
95         }
96     }
97 }
98
99 static int find_frame_rate_index(MpegEncContext *s)
100 {
101     int i;
102     AVRational bestq = (AVRational) {0, 0};
103     AVRational ext;
104     AVRational target = av_inv_q(s->avctx->time_base);
105
106     for (i = 1; i < 14; i++) {
107         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
108             i >= 9)
109             break;
110
111         for (ext.num=1; ext.num <= 4; ext.num++) {
112             for (ext.den=1; ext.den <= 32; ext.den++) {
113                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
114
115                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
116                     continue;
117                 if (av_gcd(ext.den, ext.num) != 1)
118                     continue;
119
120                 if (    bestq.num==0
121                     || av_nearer_q(target, bestq, q) < 0
122                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
123                     bestq               = q;
124                     s->frame_rate_index = i;
125                     s->mpeg2_frame_rate_ext.num = ext.num;
126                     s->mpeg2_frame_rate_ext.den = ext.den;
127                 }
128             }
129         }
130     }
131
132     if (av_cmp_q(target, bestq))
133         return -1;
134     else
135         return 0;
136 }
137
138 static av_cold int encode_init(AVCodecContext *avctx)
139 {
140     MpegEncContext *s = avctx->priv_data;
141
142     if (ff_mpv_encode_init(avctx) < 0)
143         return -1;
144
145     if (find_frame_rate_index(s) < 0) {
146         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
147             av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
148                    avctx->time_base.den, avctx->time_base.num);
149             return -1;
150         } else {
151             av_log(avctx, AV_LOG_INFO,
152                    "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
153                    avctx->time_base.den, avctx->time_base.num);
154         }
155     }
156
157     if (avctx->profile == FF_PROFILE_UNKNOWN) {
158         if (avctx->level != FF_LEVEL_UNKNOWN) {
159             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
160             return -1;
161         }
162         /* Main or 4:2:2 */
163         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
164     }
165
166     if (avctx->level == FF_LEVEL_UNKNOWN) {
167         if (avctx->profile == 0) {                  /* 4:2:2 */
168             if (avctx->width <= 720 && avctx->height <= 608)
169                 avctx->level = 5;                   /* Main */
170             else
171                 avctx->level = 2;                   /* High */
172         } else {
173             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
174                 av_log(avctx, AV_LOG_ERROR,
175                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
176                 return -1;
177             }
178             if (avctx->width <= 720 && avctx->height <= 576)
179                 avctx->level = 8;                   /* Main */
180             else if (avctx->width <= 1440)
181                 avctx->level = 6;                   /* High 1440 */
182             else
183                 avctx->level = 4;                   /* High */
184         }
185     }
186
187     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
188         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
189         return AVERROR(EINVAL);
190     }
191
192     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
193         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
194             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
195                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
196             return AVERROR(EINVAL);
197         }
198     }
199
200     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
201     if (s->drop_frame_timecode)
202         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
203     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
204         av_log(avctx, AV_LOG_ERROR,
205                "Drop frame time code only allowed with 1001/30000 fps\n");
206         return -1;
207     }
208
209 #if FF_API_PRIVATE_OPT
210 FF_DISABLE_DEPRECATION_WARNINGS
211     if (avctx->timecode_frame_start)
212         s->timecode_frame_start = avctx->timecode_frame_start;
213 FF_ENABLE_DEPRECATION_WARNINGS
214 #endif
215
216     if (s->tc_opt_str) {
217         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
218         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
219         if (ret < 0)
220             return ret;
221         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
222         s->timecode_frame_start = s->tc.start;
223     } else {
224         s->timecode_frame_start = 0; // default is -1
225     }
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         /* MPEG-1 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->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->avctx->flags & AV_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     put_bits(&s->pb, 5, s->qscale);
405 }
406
407 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
408 {
409     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
410         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
411         /* slice_vertical_position_extension */
412         put_bits(&s->pb, 3, s->mb_y >> 7);
413     } else {
414         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
415     }
416     put_qscale(s);
417     /* slice extra information */
418     put_bits(&s->pb, 1, 0);
419 }
420
421 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
422 {
423     AVFrameSideData *side_data;
424     mpeg1_encode_sequence_header(s);
425
426     /* MPEG-1 picture header */
427     put_header(s, PICTURE_START_CODE);
428     /* temporal reference */
429
430     // RAL: s->picture_number instead of s->fake_picture_number
431     put_bits(&s->pb, 10,
432              (s->picture_number - s->gop_picture_number) & 0x3ff);
433     put_bits(&s->pb, 3, s->pict_type);
434
435     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
436     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
437
438     // RAL: Forward f_code also needed for B-frames
439     if (s->pict_type == AV_PICTURE_TYPE_P ||
440         s->pict_type == AV_PICTURE_TYPE_B) {
441         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
442         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
443             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
444         else
445             put_bits(&s->pb, 3, 7);             /* forward_f_code */
446     }
447
448     // RAL: Backward f_code necessary for B-frames
449     if (s->pict_type == AV_PICTURE_TYPE_B) {
450         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
451         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
452             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
453         else
454             put_bits(&s->pb, 3, 7);             /* backward_f_code */
455     }
456
457     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
458
459     s->frame_pred_frame_dct = 1;
460     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
461         put_header(s, EXT_START_CODE);
462         put_bits(&s->pb, 4, 8);                 /* pic ext */
463         if (s->pict_type == AV_PICTURE_TYPE_P ||
464             s->pict_type == AV_PICTURE_TYPE_B) {
465             put_bits(&s->pb, 4, s->f_code);
466             put_bits(&s->pb, 4, s->f_code);
467         } else {
468             put_bits(&s->pb, 8, 255);
469         }
470         if (s->pict_type == AV_PICTURE_TYPE_B) {
471             put_bits(&s->pb, 4, s->b_code);
472             put_bits(&s->pb, 4, s->b_code);
473         } else {
474             put_bits(&s->pb, 8, 255);
475         }
476         put_bits(&s->pb, 2, s->intra_dc_precision);
477
478         av_assert0(s->picture_structure == PICT_FRAME);
479         put_bits(&s->pb, 2, s->picture_structure);
480         if (s->progressive_sequence)
481             put_bits(&s->pb, 1, 0);             /* no repeat */
482         else
483             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
484         /* XXX: optimize the generation of this flag with entropy measures */
485         s->frame_pred_frame_dct = s->progressive_sequence;
486
487         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
488         put_bits(&s->pb, 1, s->concealment_motion_vectors);
489         put_bits(&s->pb, 1, s->q_scale_type);
490         put_bits(&s->pb, 1, s->intra_vlc_format);
491         put_bits(&s->pb, 1, s->alternate_scan);
492         put_bits(&s->pb, 1, s->repeat_first_field);
493         s->progressive_frame = s->progressive_sequence;
494         /* chroma_420_type */
495         put_bits(&s->pb, 1, s->chroma_format ==
496                             CHROMA_420 ? s->progressive_frame : 0);
497         put_bits(&s->pb, 1, s->progressive_frame);
498         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
499     }
500     if (s->scan_offset) {
501         int i;
502
503         put_header(s, USER_START_CODE);
504         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
505             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
506     }
507     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
508                                        AV_FRAME_DATA_STEREO3D);
509     if (side_data) {
510         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
511         uint8_t fpa_type;
512
513         switch (stereo->type) {
514         case AV_STEREO3D_SIDEBYSIDE:
515             fpa_type = 0x03;
516             break;
517         case AV_STEREO3D_TOPBOTTOM:
518             fpa_type = 0x04;
519             break;
520         case AV_STEREO3D_2D:
521             fpa_type = 0x08;
522             break;
523         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
524             fpa_type = 0x23;
525             break;
526         default:
527             fpa_type = 0;
528             break;
529         }
530
531         if (fpa_type != 0) {
532             put_header(s, USER_START_CODE);
533             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
534             put_bits(&s->pb, 8, 'P');
535             put_bits(&s->pb, 8, '3');
536             put_bits(&s->pb, 8, 'D');
537             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
538
539             put_bits(&s->pb, 1, 1);     // reserved_bit
540             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
541             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
542             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
543         }
544     }
545
546     s->mb_y = 0;
547     ff_mpeg1_encode_slice_header(s);
548 }
549
550 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
551                                 int has_mv, int field_motion)
552 {
553     put_bits(&s->pb, n, bits);
554     if (!s->frame_pred_frame_dct) {
555         if (has_mv)
556             /* motion_type: frame/field */
557             put_bits(&s->pb, 2, 2 - field_motion);
558         put_bits(&s->pb, 1, s->interlaced_dct);
559     }
560 }
561
562 // RAL: Parameter added: f_or_b_code
563 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
564 {
565     if (val == 0) {
566         /* zero vector */
567         put_bits(&s->pb,
568                  ff_mpeg12_mbMotionVectorTable[0][1],
569                  ff_mpeg12_mbMotionVectorTable[0][0]);
570     } else {
571         int code, sign, bits;
572         int bit_size = f_or_b_code - 1;
573         int range    = 1 << bit_size;
574         /* modulo encoding */
575         val = sign_extend(val, 5 + bit_size);
576
577         if (val >= 0) {
578             val--;
579             code = (val >> bit_size) + 1;
580             bits = val & (range - 1);
581             sign = 0;
582         } else {
583             val = -val;
584             val--;
585             code = (val >> bit_size) + 1;
586             bits = val & (range - 1);
587             sign = 1;
588         }
589
590         av_assert2(code > 0 && code <= 16);
591
592         put_bits(&s->pb,
593                  ff_mpeg12_mbMotionVectorTable[code][1],
594                  ff_mpeg12_mbMotionVectorTable[code][0]);
595
596         put_bits(&s->pb, 1, sign);
597         if (bit_size > 0)
598             put_bits(&s->pb, bit_size, bits);
599     }
600 }
601
602 static inline void encode_dc(MpegEncContext *s, int diff, int component)
603 {
604     unsigned int diff_u = diff + 255;
605     if (diff_u >= 511) {
606         int index;
607
608         if (diff < 0) {
609             index = av_log2_16bit(-2 * diff);
610             diff--;
611         } else {
612             index = av_log2_16bit(2 * diff);
613         }
614         if (component == 0)
615             put_bits(&s->pb,
616                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
617                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
618                      av_mod_uintp2(diff, index));
619         else
620             put_bits(&s->pb,
621                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
622                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
623                      av_mod_uintp2(diff, index));
624     } else {
625         if (component == 0)
626             put_bits(&s->pb,
627                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
628                      mpeg1_lum_dc_uni[diff + 255] >> 8);
629         else
630             put_bits(&s->pb,
631                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
632                      mpeg1_chr_dc_uni[diff + 255] >> 8);
633     }
634 }
635
636 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
637 {
638     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
639     int code, component;
640     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
641
642     last_index = s->block_last_index[n];
643
644     /* DC coef */
645     if (s->mb_intra) {
646         component = (n <= 3 ? 0 : (n & 1) + 1);
647         dc        = block[0];                   /* overflow is impossible */
648         diff      = dc - s->last_dc[component];
649         encode_dc(s, diff, component);
650         s->last_dc[component] = dc;
651         i = 1;
652         if (s->intra_vlc_format)
653             table_vlc = ff_rl_mpeg2.table_vlc;
654     } else {
655         /* encode the first coefficient: needs to be done here because
656          * it is handled slightly differently */
657         level = block[0];
658         if (abs(level) == 1) {
659             code = ((uint32_t)level >> 31);     /* the sign bit */
660             put_bits(&s->pb, 2, code | 0x02);
661             i = 1;
662         } else {
663             i             = 0;
664             last_non_zero = -1;
665             goto next_coef;
666         }
667     }
668
669     /* now quantify & encode AC coefs */
670     last_non_zero = i - 1;
671
672     for (; i <= last_index; i++) {
673         j     = s->intra_scantable.permutated[i];
674         level = block[j];
675
676 next_coef:
677         /* encode using VLC */
678         if (level != 0) {
679             run = i - last_non_zero - 1;
680
681             alevel = level;
682             MASK_ABS(sign, alevel);
683             sign &= 1;
684
685             if (alevel <= mpeg1_max_level[0][run]) {
686                 code = mpeg1_index_run[0][run] + alevel - 1;
687                 /* store the VLC & sign at once */
688                 put_bits(&s->pb, table_vlc[code][1] + 1,
689                          (table_vlc[code][0] << 1) + sign);
690             } else {
691                 /* escape seems to be pretty rare <5% so I do not optimize it */
692                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
693                 /* escape: only clip in this case */
694                 put_bits(&s->pb, 6, run);
695                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
696                     if (alevel < 128) {
697                         put_sbits(&s->pb, 8, level);
698                     } else {
699                         if (level < 0)
700                             put_bits(&s->pb, 16, 0x8001 + level + 255);
701                         else
702                             put_sbits(&s->pb, 16, level);
703                     }
704                 } else {
705                     put_sbits(&s->pb, 12, level);
706                 }
707             }
708             last_non_zero = i;
709         }
710     }
711     /* end of block */
712     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
713 }
714
715 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
716                                                       int16_t block[8][64],
717                                                       int motion_x, int motion_y,
718                                                       int mb_block_count)
719 {
720     int i, cbp;
721     const int mb_x     = s->mb_x;
722     const int mb_y     = s->mb_y;
723     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
724
725     /* compute cbp */
726     cbp = 0;
727     for (i = 0; i < mb_block_count; i++)
728         if (s->block_last_index[i] >= 0)
729             cbp |= 1 << (mb_block_count - 1 - i);
730
731     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
732         (mb_x != s->mb_width - 1 ||
733          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
734         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
735          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
736           (((s->mv_dir & MV_DIR_FORWARD)
737             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
738                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
739            ((s->mv_dir & MV_DIR_BACKWARD)
740             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
741                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
742         s->mb_skip_run++;
743         s->qscale -= s->dquant;
744         s->skip_count++;
745         s->misc_bits++;
746         s->last_bits++;
747         if (s->pict_type == AV_PICTURE_TYPE_P) {
748             s->last_mv[0][0][0] =
749             s->last_mv[0][0][1] =
750             s->last_mv[0][1][0] =
751             s->last_mv[0][1][1] = 0;
752         }
753     } else {
754         if (first_mb) {
755             av_assert0(s->mb_skip_run == 0);
756             encode_mb_skip_run(s, s->mb_x);
757         } else {
758             encode_mb_skip_run(s, s->mb_skip_run);
759         }
760
761         if (s->pict_type == AV_PICTURE_TYPE_I) {
762             if (s->dquant && cbp) {
763                 /* macroblock_type: macroblock_quant = 1 */
764                 put_mb_modes(s, 2, 1, 0, 0);
765                 put_qscale(s);
766             } else {
767                 /* macroblock_type: macroblock_quant = 0 */
768                 put_mb_modes(s, 1, 1, 0, 0);
769                 s->qscale -= s->dquant;
770             }
771             s->misc_bits += get_bits_diff(s);
772             s->i_count++;
773         } else if (s->mb_intra) {
774             if (s->dquant && cbp) {
775                 put_mb_modes(s, 6, 0x01, 0, 0);
776                 put_qscale(s);
777             } else {
778                 put_mb_modes(s, 5, 0x03, 0, 0);
779                 s->qscale -= s->dquant;
780             }
781             s->misc_bits += get_bits_diff(s);
782             s->i_count++;
783             memset(s->last_mv, 0, sizeof(s->last_mv));
784         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
785             if (s->mv_type == MV_TYPE_16X16) {
786                 if (cbp != 0) {
787                     if ((motion_x | motion_y) == 0) {
788                         if (s->dquant) {
789                             /* macroblock_pattern & quant */
790                             put_mb_modes(s, 5, 1, 0, 0);
791                             put_qscale(s);
792                         } else {
793                             /* macroblock_pattern only */
794                             put_mb_modes(s, 2, 1, 0, 0);
795                         }
796                         s->misc_bits += get_bits_diff(s);
797                     } else {
798                         if (s->dquant) {
799                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
800                             put_qscale(s);
801                         } else {
802                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
803                         }
804                         s->misc_bits += get_bits_diff(s);
805                         // RAL: f_code parameter added
806                         mpeg1_encode_motion(s,
807                                             motion_x - s->last_mv[0][0][0],
808                                             s->f_code);
809                         // RAL: f_code parameter added
810                         mpeg1_encode_motion(s,
811                                             motion_y - s->last_mv[0][0][1],
812                                             s->f_code);
813                         s->mv_bits += get_bits_diff(s);
814                     }
815                 } else {
816                     put_bits(&s->pb, 3, 1);         /* motion only */
817                     if (!s->frame_pred_frame_dct)
818                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
819                     s->misc_bits += get_bits_diff(s);
820                     // RAL: f_code parameter added
821                     mpeg1_encode_motion(s,
822                                         motion_x - s->last_mv[0][0][0],
823                                         s->f_code);
824                     // RAL: f_code parameter added
825                     mpeg1_encode_motion(s,
826                                         motion_y - s->last_mv[0][0][1],
827                                         s->f_code);
828                     s->qscale  -= s->dquant;
829                     s->mv_bits += get_bits_diff(s);
830                 }
831                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
832                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
833             } else {
834                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
835
836                 if (cbp) {
837                     if (s->dquant) {
838                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
839                         put_qscale(s);
840                     } else {
841                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
842                     }
843                 } else {
844                     put_bits(&s->pb, 3, 1);             /* motion only */
845                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
846                     s->qscale -= s->dquant;
847                 }
848                 s->misc_bits += get_bits_diff(s);
849                 for (i = 0; i < 2; i++) {
850                     put_bits(&s->pb, 1, s->field_select[0][i]);
851                     mpeg1_encode_motion(s,
852                                         s->mv[0][i][0] - s->last_mv[0][i][0],
853                                         s->f_code);
854                     mpeg1_encode_motion(s,
855                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
856                                         s->f_code);
857                     s->last_mv[0][i][0] = s->mv[0][i][0];
858                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
859                 }
860                 s->mv_bits += get_bits_diff(s);
861             }
862             if (cbp) {
863                 if (s->chroma_y_shift) {
864                     put_bits(&s->pb,
865                              ff_mpeg12_mbPatTable[cbp][1],
866                              ff_mpeg12_mbPatTable[cbp][0]);
867                 } else {
868                     put_bits(&s->pb,
869                              ff_mpeg12_mbPatTable[cbp >> 2][1],
870                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
871                     put_sbits(&s->pb, 2, cbp);
872                 }
873             }
874             s->f_count++;
875         } else {
876             if (s->mv_type == MV_TYPE_16X16) {
877                 if (cbp) {                      // With coded bloc pattern
878                     if (s->dquant) {
879                         if (s->mv_dir == MV_DIR_FORWARD)
880                             put_mb_modes(s, 6, 3, 1, 0);
881                         else
882                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
883                         put_qscale(s);
884                     } else {
885                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
886                     }
887                 } else {                        // No coded bloc pattern
888                     put_bits(&s->pb, 5 - s->mv_dir, 2);
889                     if (!s->frame_pred_frame_dct)
890                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
891                     s->qscale -= s->dquant;
892                 }
893                 s->misc_bits += get_bits_diff(s);
894                 if (s->mv_dir & MV_DIR_FORWARD) {
895                     mpeg1_encode_motion(s,
896                                         s->mv[0][0][0] - s->last_mv[0][0][0],
897                                         s->f_code);
898                     mpeg1_encode_motion(s,
899                                         s->mv[0][0][1] - s->last_mv[0][0][1],
900                                         s->f_code);
901                     s->last_mv[0][0][0] =
902                     s->last_mv[0][1][0] = s->mv[0][0][0];
903                     s->last_mv[0][0][1] =
904                     s->last_mv[0][1][1] = s->mv[0][0][1];
905                     s->f_count++;
906                 }
907                 if (s->mv_dir & MV_DIR_BACKWARD) {
908                     mpeg1_encode_motion(s,
909                                         s->mv[1][0][0] - s->last_mv[1][0][0],
910                                         s->b_code);
911                     mpeg1_encode_motion(s,
912                                         s->mv[1][0][1] - s->last_mv[1][0][1],
913                                         s->b_code);
914                     s->last_mv[1][0][0] =
915                     s->last_mv[1][1][0] = s->mv[1][0][0];
916                     s->last_mv[1][0][1] =
917                     s->last_mv[1][1][1] = s->mv[1][0][1];
918                     s->b_count++;
919                 }
920             } else {
921                 av_assert2(s->mv_type == MV_TYPE_FIELD);
922                 av_assert2(!s->frame_pred_frame_dct);
923                 if (cbp) {                      // With coded bloc pattern
924                     if (s->dquant) {
925                         if (s->mv_dir == MV_DIR_FORWARD)
926                             put_mb_modes(s, 6, 3, 1, 1);
927                         else
928                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
929                         put_qscale(s);
930                     } else {
931                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
932                     }
933                 } else {                        // No coded bloc pattern
934                     put_bits(&s->pb, 5 - s->mv_dir, 2);
935                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
936                     s->qscale -= s->dquant;
937                 }
938                 s->misc_bits += get_bits_diff(s);
939                 if (s->mv_dir & MV_DIR_FORWARD) {
940                     for (i = 0; i < 2; i++) {
941                         put_bits(&s->pb, 1, s->field_select[0][i]);
942                         mpeg1_encode_motion(s,
943                                             s->mv[0][i][0] - s->last_mv[0][i][0],
944                                             s->f_code);
945                         mpeg1_encode_motion(s,
946                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
947                                             s->f_code);
948                         s->last_mv[0][i][0] = s->mv[0][i][0];
949                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
950                     }
951                     s->f_count++;
952                 }
953                 if (s->mv_dir & MV_DIR_BACKWARD) {
954                     for (i = 0; i < 2; i++) {
955                         put_bits(&s->pb, 1, s->field_select[1][i]);
956                         mpeg1_encode_motion(s,
957                                             s->mv[1][i][0] - s->last_mv[1][i][0],
958                                             s->b_code);
959                         mpeg1_encode_motion(s,
960                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
961                                             s->b_code);
962                         s->last_mv[1][i][0] = s->mv[1][i][0];
963                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
964                     }
965                     s->b_count++;
966                 }
967             }
968             s->mv_bits += get_bits_diff(s);
969             if (cbp) {
970                 if (s->chroma_y_shift) {
971                     put_bits(&s->pb,
972                              ff_mpeg12_mbPatTable[cbp][1],
973                              ff_mpeg12_mbPatTable[cbp][0]);
974                 } else {
975                     put_bits(&s->pb,
976                              ff_mpeg12_mbPatTable[cbp >> 2][1],
977                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
978                     put_sbits(&s->pb, 2, cbp);
979                 }
980             }
981         }
982         for (i = 0; i < mb_block_count; i++)
983             if (cbp & (1 << (mb_block_count - 1 - i)))
984                 mpeg1_encode_block(s, block[i], i);
985         s->mb_skip_run = 0;
986         if (s->mb_intra)
987             s->i_tex_bits += get_bits_diff(s);
988         else
989             s->p_tex_bits += get_bits_diff(s);
990     }
991 }
992
993 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
994                         int motion_x, int motion_y)
995 {
996     if (s->chroma_format == CHROMA_420)
997         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
998     else
999         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1000 }
1001
1002 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1003 {
1004     static int done = 0;
1005
1006     ff_mpeg12_common_init(s);
1007
1008     if (!done) {
1009         int f_code;
1010         int mv;
1011         int i;
1012
1013         done = 1;
1014         ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1015         ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1016
1017         for (i = 0; i < 64; i++) {
1018             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1019             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1020         }
1021
1022         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1023         if (s->intra_vlc_format)
1024             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1025
1026         /* build unified dc encoding tables */
1027         for (i = -255; i < 256; i++) {
1028             int adiff, index;
1029             int bits, code;
1030             int diff = i;
1031
1032             adiff = FFABS(diff);
1033             if (diff < 0)
1034                 diff--;
1035             index = av_log2(2 * adiff);
1036
1037             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1038             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1039                     av_mod_uintp2(diff, index);
1040             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1041
1042             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1043             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1044                     av_mod_uintp2(diff, index);
1045             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1046         }
1047
1048         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1049             for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1050                 int len;
1051
1052                 if (mv == 0) {
1053                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1054                 } else {
1055                     int val, bit_size, code;
1056
1057                     bit_size = f_code - 1;
1058
1059                     val = mv;
1060                     if (val < 0)
1061                         val = -val;
1062                     val--;
1063                     code = (val >> bit_size) + 1;
1064                     if (code < 17)
1065                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1066                               1 + bit_size;
1067                     else
1068                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1069                               2 + bit_size;
1070                 }
1071
1072                 mv_penalty[f_code][mv + MAX_DMV] = len;
1073             }
1074
1075
1076         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1077             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1078                 fcode_tab[mv + MAX_MV] = f_code;
1079     }
1080     s->me.mv_penalty = mv_penalty;
1081     s->fcode_tab     = fcode_tab;
1082     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1083         s->min_qcoeff = -255;
1084         s->max_qcoeff = 255;
1085     } else {
1086         s->min_qcoeff = -2047;
1087         s->max_qcoeff = 2047;
1088     }
1089     if (s->intra_vlc_format) {
1090         s->intra_ac_vlc_length      =
1091         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1092     } else {
1093         s->intra_ac_vlc_length      =
1094         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1095     }
1096     s->inter_ac_vlc_length      =
1097     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1098 }
1099
1100 #define OFFSET(x) offsetof(MpegEncContext, x)
1101 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1102 #define COMMON_OPTS                                                           \
1103     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.",   \
1104       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1105     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1106       OFFSET(intra_vlc_format),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1107     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1108       OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1109     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1110       OFFSET(scan_offset),         AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1111     { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1112       OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1113
1114 static const AVOption mpeg1_options[] = {
1115     COMMON_OPTS
1116     FF_MPV_COMMON_OPTS
1117     { NULL },
1118 };
1119
1120 static const AVOption mpeg2_options[] = {
1121     COMMON_OPTS
1122     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1123     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1124     { "seq_disp_ext",     "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1125     {     "auto",   NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = -1},  0, 0, VE, "seq_disp_ext" },
1126     {     "never",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 0 },  0, 0, VE, "seq_disp_ext" },
1127     {     "always", NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 1 },  0, 0, VE, "seq_disp_ext" },
1128     FF_MPV_COMMON_OPTS
1129     { NULL },
1130 };
1131
1132 #define mpeg12_class(x)                                 \
1133 static const AVClass mpeg ## x ## _class = {            \
1134     .class_name = "mpeg" # x "video encoder",           \
1135     .item_name  = av_default_item_name,                 \
1136     .option     = mpeg ## x ## _options,                \
1137     .version    = LIBAVUTIL_VERSION_INT,                \
1138 };
1139
1140 mpeg12_class(1)
1141 mpeg12_class(2)
1142
1143 AVCodec ff_mpeg1video_encoder = {
1144     .name                 = "mpeg1video",
1145     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1146     .type                 = AVMEDIA_TYPE_VIDEO,
1147     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1148     .priv_data_size       = sizeof(MpegEncContext),
1149     .init                 = encode_init,
1150     .encode2              = ff_mpv_encode_picture,
1151     .close                = ff_mpv_encode_end,
1152     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1153     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1154                                                            AV_PIX_FMT_NONE },
1155     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1156     .priv_class           = &mpeg1_class,
1157 };
1158
1159 AVCodec ff_mpeg2video_encoder = {
1160     .name                 = "mpeg2video",
1161     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1162     .type                 = AVMEDIA_TYPE_VIDEO,
1163     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1164     .priv_data_size       = sizeof(MpegEncContext),
1165     .init                 = encode_init,
1166     .encode2              = ff_mpv_encode_picture,
1167     .close                = ff_mpv_encode_end,
1168     .supported_framerates = ff_mpeg2_frame_rate_tab,
1169     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1170                                                            AV_PIX_FMT_YUV422P,
1171                                                            AV_PIX_FMT_NONE },
1172     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1173     .priv_class           = &mpeg2_class,
1174 };