3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
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"
38 #include "bytestream.h"
41 #include "mpeg12data.h"
42 #include "mpegutils.h"
43 #include "mpegvideo.h"
46 static const uint8_t inv_non_linear_qscale
[] = {
47 0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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,
55 static uint8_t mv_penalty
[MAX_FCODE
+ 1][MAX_MV
* 2 + 1];
56 static uint8_t fcode_tab
[MAX_MV
* 2 + 1];
58 static uint8_t uni_mpeg1_ac_vlc_len
[64 * 64 * 2];
59 static uint8_t uni_mpeg2_ac_vlc_len
[64 * 64 * 2];
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];
66 static uint8_t mpeg1_index_run
[2][64];
67 static int8_t mpeg1_max_level
[2][64];
69 static av_cold
void init_uni_ac_vlc(RLTable
*rl
, uint8_t *uni_ac_vlc_len
)
73 for (i
= 0; i
< 128; i
++) {
78 for (run
= 0; run
< 64; run
++) {
80 int alevel
= FFABS(level
);
82 if (alevel
> rl
->max_level
[0][run
])
83 code
= 111; /* rl->n */
85 code
= rl
->index_run
[0][run
] + alevel
- 1;
87 if (code
< 111) { /* rl->n */
88 /* length of VLC and sign */
89 len
= rl
->table_vlc
[code
][1] + 1;
91 len
= rl
->table_vlc
[111 /* rl->n */][1] + 6;
99 uni_ac_vlc_len
[UNI_AC_ENC_INDEX(run
, i
)] = len
;
104 static int find_frame_rate_index(MpegEncContext
*s
)
107 AVRational bestq
= (AVRational
) {0, 0};
109 AVRational target
= av_inv_q(s
->avctx
->time_base
);
111 for (i
= 1; i
< 14; i
++) {
112 if (s
->avctx
->strict_std_compliance
> FF_COMPLIANCE_UNOFFICIAL
&&
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
]);
120 if (s
->codec_id
!= AV_CODEC_ID_MPEG2VIDEO
&& (ext
.den
!=1 || ext
.num
!=1))
122 if (av_gcd(ext
.den
, ext
.num
) != 1)
126 || av_nearer_q(target
, bestq
, q
) < 0
127 || ext
.num
==1 && ext
.den
==1 && av_nearer_q(target
, bestq
, q
) == 0) {
129 s
->frame_rate_index
= i
;
130 s
->mpeg2_frame_rate_ext
.num
= ext
.num
;
131 s
->mpeg2_frame_rate_ext
.den
= ext
.den
;
137 if (av_cmp_q(target
, bestq
))
143 static av_cold
int encode_init(AVCodecContext
*avctx
)
145 MpegEncContext
*s
= avctx
->priv_data
;
147 if (avctx
->codec_id
== AV_CODEC_ID_MPEG1VIDEO
&& avctx
->height
> 2800)
148 avctx
->thread_count
= 1;
150 if (ff_mpv_encode_init(avctx
) < 0)
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
);
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
);
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");
171 avctx
->profile
= s
->chroma_format
== CHROMA_420
? 4 : 0;
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 */
179 avctx
->level
= 2; /* High */
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");
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 */
191 avctx
->level
= 4; /* High */
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
);
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
);
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");
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
);
222 s
->drop_frame_timecode
= !!(s
->tc
.flags
& AV_TIMECODE_FLAG_DROPFRAME
);
223 s
->avctx
->timecode_frame_start
= s
->tc
.start
;
225 s
->avctx
->timecode_frame_start
= 0; // default is -1
230 static void put_header(MpegEncContext
*s
, int header
)
232 avpriv_align_put_bits(&s
->pb
);
233 put_bits(&s
->pb
, 16, header
>> 16);
234 put_sbits(&s
->pb
, 16, header
);
237 /* put sequence header if needed */
238 static void mpeg1_encode_sequence_header(MpegEncContext
*s
)
240 unsigned int vbv_buffer_size
, fps
, v
;
241 int i
, constraint_parameter_flag
;
243 int64_t best_aspect_error
= INT64_MAX
;
244 AVRational aspect_ratio
= s
->avctx
->sample_aspect_ratio
;
246 if (aspect_ratio
.num
== 0 || aspect_ratio
.den
== 0)
247 aspect_ratio
= (AVRational
){1,1}; // pixel aspect 1.1 (VGA)
249 if (s
->current_picture
.f
->key_frame
) {
250 AVRational framerate
= ff_mpeg12_frame_rate_tab
[s
->frame_rate_index
];
252 /* mpeg1 header repeated every gop */
253 put_header(s
, SEQ_START_CODE
);
255 put_sbits(&s
->pb
, 12, s
->width
& 0xFFF);
256 put_sbits(&s
->pb
, 12, s
->height
& 0xFFF);
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
];
263 error
-= (1LL<<32)*ff_mpeg2_aspect
[i
].num
* s
->height
/ s
->width
/ ff_mpeg2_aspect
[i
].den
;
265 error
= FFABS(error
);
267 if (error
- 2 <= best_aspect_error
) {
268 best_aspect_error
= error
;
269 s
->aspect_ratio_info
= i
;
273 put_bits(&s
->pb
, 4, s
->aspect_ratio_info
);
274 put_bits(&s
->pb
, 4, s
->frame_rate_index
);
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
)
284 if (s
->avctx
->rc_buffer_size
)
285 vbv_buffer_size
= s
->avctx
->rc_buffer_size
;
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;
292 put_sbits(&s
->pb
, 18, v
);
293 put_bits(&s
->pb
, 1, 1); // marker
294 put_sbits(&s
->pb
, 10, vbv_buffer_size
);
296 constraint_parameter_flag
=
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
;
308 put_bits(&s
->pb
, 1, constraint_parameter_flag
);
310 ff_write_quant_matrix(&s
->pb
, s
->avctx
->intra_matrix
);
311 ff_write_quant_matrix(&s
->pb
, s
->avctx
->inter_matrix
);
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
;
319 put_header(s
, EXT_START_CODE
);
320 put_bits(&s
->pb
, 4, 1); // seq ext
322 put_bits(&s
->pb
, 1, s
->avctx
->profile
== 0); // escx 1 for 4:2:2 profile
324 put_bits(&s
->pb
, 3, s
->avctx
->profile
); // profile
325 put_bits(&s
->pb
, 4, s
->avctx
->level
); // level
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
338 side_data
= av_frame_get_side_data(s
->current_picture_ptr
->f
, AV_FRAME_DATA_PANSCAN
);
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;
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
);
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
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
;
376 s
->gop_picture_number
= s
->current_picture_ptr
->f
->coded_picture_number
;
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
);
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
392 static inline void encode_mb_skip_run(MpegEncContext
*s
, int run
)
395 put_bits(&s
->pb
, 11, 0x008);
398 put_bits(&s
->pb
, ff_mpeg12_mbAddrIncrTable
[run
][1],
399 ff_mpeg12_mbAddrIncrTable
[run
][0]);
402 static av_always_inline
void put_qscale(MpegEncContext
*s
)
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
]);
408 put_bits(&s
->pb
, 5, s
->qscale
);
412 void ff_mpeg1_encode_slice_header(MpegEncContext
*s
)
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);
419 put_header(s
, SLICE_MIN_START_CODE
+ s
->mb_y
);
422 /* slice extra information */
423 put_bits(&s
->pb
, 1, 0);
426 void ff_mpeg1_encode_picture_header(MpegEncContext
*s
, int picture_number
)
428 AVFrameSideData
*side_data
;
429 mpeg1_encode_sequence_header(s
);
431 /* mpeg1 picture header */
432 put_header(s
, PICTURE_START_CODE
);
433 /* temporal reference */
435 // RAL: s->picture_number instead of s->fake_picture_number
437 (s
->picture_number
- s
->gop_picture_number
) & 0x3ff);
438 put_bits(&s
->pb
, 3, s
->pict_type
);
440 s
->vbv_delay_ptr
= s
->pb
.buf
+ put_bits_count(&s
->pb
) / 8;
441 put_bits(&s
->pb
, 16, 0xFFFF); /* vbv_delay */
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 */
450 put_bits(&s
->pb
, 3, 7); /* forward_f_code */
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 */
459 put_bits(&s
->pb
, 3, 7); /* backward_f_code */
462 put_bits(&s
->pb
, 1, 0); /* extra bit picture */
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
);
473 put_bits(&s
->pb
, 8, 255);
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
);
479 put_bits(&s
->pb
, 8, 255);
481 put_bits(&s
->pb
, 2, s
->intra_dc_precision
);
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 */
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
;
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 */
505 if (s
->scan_offset
) {
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
]);
512 side_data
= av_frame_get_side_data(s
->current_picture_ptr
->f
,
513 AV_FRAME_DATA_STEREO3D
);
515 AVStereo3D
*stereo
= (AVStereo3D
*)side_data
->data
;
518 switch (stereo
->type
) {
519 case AV_STEREO3D_SIDEBYSIDE
:
522 case AV_STEREO3D_TOPBOTTOM
:
528 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX
:
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
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]
552 ff_mpeg1_encode_slice_header(s
);
555 static inline void put_mb_modes(MpegEncContext
*s
, int n
, int bits
,
556 int has_mv
, int field_motion
)
558 put_bits(&s
->pb
, n
, bits
);
559 if (!s
->frame_pred_frame_dct
) {
561 /* motion_type: frame/field */
562 put_bits(&s
->pb
, 2, 2 - field_motion
);
563 put_bits(&s
->pb
, 1, s
->interlaced_dct
);
567 // RAL: Parameter added: f_or_b_code
568 static void mpeg1_encode_motion(MpegEncContext
*s
, int val
, int f_or_b_code
)
573 ff_mpeg12_mbMotionVectorTable
[0][1],
574 ff_mpeg12_mbMotionVectorTable
[0][0]);
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
);
584 code
= (val
>> bit_size
) + 1;
585 bits
= val
& (range
- 1);
590 code
= (val
>> bit_size
) + 1;
591 bits
= val
& (range
- 1);
595 av_assert2(code
> 0 && code
<= 16);
598 ff_mpeg12_mbMotionVectorTable
[code
][1],
599 ff_mpeg12_mbMotionVectorTable
[code
][0]);
601 put_bits(&s
->pb
, 1, sign
);
603 put_bits(&s
->pb
, bit_size
, bits
);
607 static inline void encode_dc(MpegEncContext
*s
, int diff
, int component
)
609 unsigned int diff_u
= diff
+ 255;
614 index
= av_log2_16bit(-2 * diff
);
617 index
= av_log2_16bit(2 * diff
);
621 ff_mpeg12_vlc_dc_lum_bits
[index
] + index
,
622 (ff_mpeg12_vlc_dc_lum_code
[index
] << index
) +
623 (diff
& ((1 << index
) - 1)));
626 ff_mpeg12_vlc_dc_chroma_bits
[index
] + index
,
627 (ff_mpeg12_vlc_dc_chroma_code
[index
] << index
) +
628 (diff
& ((1 << index
) - 1)));
632 mpeg1_lum_dc_uni
[diff
+ 255] & 0xFF,
633 mpeg1_lum_dc_uni
[diff
+ 255] >> 8);
636 mpeg1_chr_dc_uni
[diff
+ 255] & 0xFF,
637 mpeg1_chr_dc_uni
[diff
+ 255] >> 8);
641 static void mpeg1_encode_block(MpegEncContext
*s
, int16_t *block
, int n
)
643 int alevel
, level
, last_non_zero
, dc
, diff
, i
, j
, run
, last_index
, sign
;
645 const uint16_t (*table_vlc
)[2] = ff_rl_mpeg1
.table_vlc
;
647 last_index
= s
->block_last_index
[n
];
651 component
= (n
<= 3 ? 0 : (n
& 1) + 1);
652 dc
= block
[0]; /* overflow is impossible */
653 diff
= dc
- s
->last_dc
[component
];
654 encode_dc(s
, diff
, component
);
655 s
->last_dc
[component
] = dc
;
657 if (s
->intra_vlc_format
)
658 table_vlc
= ff_rl_mpeg2
.table_vlc
;
660 /* encode the first coefficient: needs to be done here because
661 * it is handled slightly differently */
663 if (abs(level
) == 1) {
664 code
= ((uint32_t)level
>> 31); /* the sign bit */
665 put_bits(&s
->pb
, 2, code
| 0x02);
674 /* now quantify & encode AC coefs */
675 last_non_zero
= i
- 1;
677 for (; i
<= last_index
; i
++) {
678 j
= s
->intra_scantable
.permutated
[i
];
682 /* encode using VLC */
684 run
= i
- last_non_zero
- 1;
687 MASK_ABS(sign
, alevel
);
690 if (alevel
<= mpeg1_max_level
[0][run
]) {
691 code
= mpeg1_index_run
[0][run
] + alevel
- 1;
692 /* store the VLC & sign at once */
693 put_bits(&s
->pb
, table_vlc
[code
][1] + 1,
694 (table_vlc
[code
][0] << 1) + sign
);
696 /* escape seems to be pretty rare <5% so I do not optimize it */
697 put_bits(&s
->pb
, table_vlc
[111][1], table_vlc
[111][0]);
698 /* escape: only clip in this case */
699 put_bits(&s
->pb
, 6, run
);
700 if (s
->codec_id
== AV_CODEC_ID_MPEG1VIDEO
) {
702 put_sbits(&s
->pb
, 8, level
);
705 put_bits(&s
->pb
, 16, 0x8001 + level
+ 255);
707 put_sbits(&s
->pb
, 16, level
);
710 put_sbits(&s
->pb
, 12, level
);
717 put_bits(&s
->pb
, table_vlc
[112][1], table_vlc
[112][0]);
720 static av_always_inline
void mpeg1_encode_mb_internal(MpegEncContext
*s
,
721 int16_t block
[8][64],
722 int motion_x
, int motion_y
,
726 const int mb_x
= s
->mb_x
;
727 const int mb_y
= s
->mb_y
;
728 const int first_mb
= mb_x
== s
->resync_mb_x
&& mb_y
== s
->resync_mb_y
;
732 for (i
= 0; i
< mb_block_count
; i
++)
733 if (s
->block_last_index
[i
] >= 0)
734 cbp
|= 1 << (mb_block_count
- 1 - i
);
736 if (cbp
== 0 && !first_mb
&& s
->mv_type
== MV_TYPE_16X16
&&
737 (mb_x
!= s
->mb_width
- 1 ||
738 (mb_y
!= s
->end_mb_y
- 1 && s
->codec_id
== AV_CODEC_ID_MPEG1VIDEO
)) &&
739 ((s
->pict_type
== AV_PICTURE_TYPE_P
&& (motion_x
| motion_y
) == 0) ||
740 (s
->pict_type
== AV_PICTURE_TYPE_B
&& s
->mv_dir
== s
->last_mv_dir
&&
741 (((s
->mv_dir
& MV_DIR_FORWARD
)
742 ? ((s
->mv
[0][0][0] - s
->last_mv
[0][0][0]) |
743 (s
->mv
[0][0][1] - s
->last_mv
[0][0][1])) : 0) |
744 ((s
->mv_dir
& MV_DIR_BACKWARD
)
745 ? ((s
->mv
[1][0][0] - s
->last_mv
[1][0][0]) |
746 (s
->mv
[1][0][1] - s
->last_mv
[1][0][1])) : 0)) == 0))) {
748 s
->qscale
-= s
->dquant
;
752 if (s
->pict_type
== AV_PICTURE_TYPE_P
) {
753 s
->last_mv
[0][0][0] =
754 s
->last_mv
[0][0][1] =
755 s
->last_mv
[0][1][0] =
756 s
->last_mv
[0][1][1] = 0;
760 av_assert0(s
->mb_skip_run
== 0);
761 encode_mb_skip_run(s
, s
->mb_x
);
763 encode_mb_skip_run(s
, s
->mb_skip_run
);
766 if (s
->pict_type
== AV_PICTURE_TYPE_I
) {
767 if (s
->dquant
&& cbp
) {
768 /* macroblock_type: macroblock_quant = 1 */
769 put_mb_modes(s
, 2, 1, 0, 0);
772 /* macroblock_type: macroblock_quant = 0 */
773 put_mb_modes(s
, 1, 1, 0, 0);
774 s
->qscale
-= s
->dquant
;
776 s
->misc_bits
+= get_bits_diff(s
);
778 } else if (s
->mb_intra
) {
779 if (s
->dquant
&& cbp
) {
780 put_mb_modes(s
, 6, 0x01, 0, 0);
783 put_mb_modes(s
, 5, 0x03, 0, 0);
784 s
->qscale
-= s
->dquant
;
786 s
->misc_bits
+= get_bits_diff(s
);
788 memset(s
->last_mv
, 0, sizeof(s
->last_mv
));
789 } else if (s
->pict_type
== AV_PICTURE_TYPE_P
) {
790 if (s
->mv_type
== MV_TYPE_16X16
) {
792 if ((motion_x
| motion_y
) == 0) {
794 /* macroblock_pattern & quant */
795 put_mb_modes(s
, 5, 1, 0, 0);
798 /* macroblock_pattern only */
799 put_mb_modes(s
, 2, 1, 0, 0);
801 s
->misc_bits
+= get_bits_diff(s
);
804 put_mb_modes(s
, 5, 2, 1, 0); /* motion + cbp */
807 put_mb_modes(s
, 1, 1, 1, 0); /* motion + cbp */
809 s
->misc_bits
+= get_bits_diff(s
);
810 // RAL: f_code parameter added
811 mpeg1_encode_motion(s
,
812 motion_x
- s
->last_mv
[0][0][0],
814 // RAL: f_code parameter added
815 mpeg1_encode_motion(s
,
816 motion_y
- s
->last_mv
[0][0][1],
818 s
->mv_bits
+= get_bits_diff(s
);
821 put_bits(&s
->pb
, 3, 1); /* motion only */
822 if (!s
->frame_pred_frame_dct
)
823 put_bits(&s
->pb
, 2, 2); /* motion_type: frame */
824 s
->misc_bits
+= get_bits_diff(s
);
825 // RAL: f_code parameter added
826 mpeg1_encode_motion(s
,
827 motion_x
- s
->last_mv
[0][0][0],
829 // RAL: f_code parameter added
830 mpeg1_encode_motion(s
,
831 motion_y
- s
->last_mv
[0][0][1],
833 s
->qscale
-= s
->dquant
;
834 s
->mv_bits
+= get_bits_diff(s
);
836 s
->last_mv
[0][1][0] = s
->last_mv
[0][0][0] = motion_x
;
837 s
->last_mv
[0][1][1] = s
->last_mv
[0][0][1] = motion_y
;
839 av_assert2(!s
->frame_pred_frame_dct
&& s
->mv_type
== MV_TYPE_FIELD
);
843 put_mb_modes(s
, 5, 2, 1, 1); /* motion + cbp */
846 put_mb_modes(s
, 1, 1, 1, 1); /* motion + cbp */
849 put_bits(&s
->pb
, 3, 1); /* motion only */
850 put_bits(&s
->pb
, 2, 1); /* motion_type: field */
851 s
->qscale
-= s
->dquant
;
853 s
->misc_bits
+= get_bits_diff(s
);
854 for (i
= 0; i
< 2; i
++) {
855 put_bits(&s
->pb
, 1, s
->field_select
[0][i
]);
856 mpeg1_encode_motion(s
,
857 s
->mv
[0][i
][0] - s
->last_mv
[0][i
][0],
859 mpeg1_encode_motion(s
,
860 s
->mv
[0][i
][1] - (s
->last_mv
[0][i
][1] >> 1),
862 s
->last_mv
[0][i
][0] = s
->mv
[0][i
][0];
863 s
->last_mv
[0][i
][1] = 2 * s
->mv
[0][i
][1];
865 s
->mv_bits
+= get_bits_diff(s
);
868 if (s
->chroma_y_shift
) {
870 ff_mpeg12_mbPatTable
[cbp
][1],
871 ff_mpeg12_mbPatTable
[cbp
][0]);
874 ff_mpeg12_mbPatTable
[cbp
>> 2][1],
875 ff_mpeg12_mbPatTable
[cbp
>> 2][0]);
876 put_sbits(&s
->pb
, 2, cbp
);
881 if (s
->mv_type
== MV_TYPE_16X16
) {
882 if (cbp
) { // With coded bloc pattern
884 if (s
->mv_dir
== MV_DIR_FORWARD
)
885 put_mb_modes(s
, 6, 3, 1, 0);
887 put_mb_modes(s
, 8 - s
->mv_dir
, 2, 1, 0);
890 put_mb_modes(s
, 5 - s
->mv_dir
, 3, 1, 0);
892 } else { // No coded bloc pattern
893 put_bits(&s
->pb
, 5 - s
->mv_dir
, 2);
894 if (!s
->frame_pred_frame_dct
)
895 put_bits(&s
->pb
, 2, 2); /* motion_type: frame */
896 s
->qscale
-= s
->dquant
;
898 s
->misc_bits
+= get_bits_diff(s
);
899 if (s
->mv_dir
& MV_DIR_FORWARD
) {
900 mpeg1_encode_motion(s
,
901 s
->mv
[0][0][0] - s
->last_mv
[0][0][0],
903 mpeg1_encode_motion(s
,
904 s
->mv
[0][0][1] - s
->last_mv
[0][0][1],
906 s
->last_mv
[0][0][0] =
907 s
->last_mv
[0][1][0] = s
->mv
[0][0][0];
908 s
->last_mv
[0][0][1] =
909 s
->last_mv
[0][1][1] = s
->mv
[0][0][1];
912 if (s
->mv_dir
& MV_DIR_BACKWARD
) {
913 mpeg1_encode_motion(s
,
914 s
->mv
[1][0][0] - s
->last_mv
[1][0][0],
916 mpeg1_encode_motion(s
,
917 s
->mv
[1][0][1] - s
->last_mv
[1][0][1],
919 s
->last_mv
[1][0][0] =
920 s
->last_mv
[1][1][0] = s
->mv
[1][0][0];
921 s
->last_mv
[1][0][1] =
922 s
->last_mv
[1][1][1] = s
->mv
[1][0][1];
926 av_assert2(s
->mv_type
== MV_TYPE_FIELD
);
927 av_assert2(!s
->frame_pred_frame_dct
);
928 if (cbp
) { // With coded bloc pattern
930 if (s
->mv_dir
== MV_DIR_FORWARD
)
931 put_mb_modes(s
, 6, 3, 1, 1);
933 put_mb_modes(s
, 8 - s
->mv_dir
, 2, 1, 1);
936 put_mb_modes(s
, 5 - s
->mv_dir
, 3, 1, 1);
938 } else { // No coded bloc pattern
939 put_bits(&s
->pb
, 5 - s
->mv_dir
, 2);
940 put_bits(&s
->pb
, 2, 1); /* motion_type: field */
941 s
->qscale
-= s
->dquant
;
943 s
->misc_bits
+= get_bits_diff(s
);
944 if (s
->mv_dir
& MV_DIR_FORWARD
) {
945 for (i
= 0; i
< 2; i
++) {
946 put_bits(&s
->pb
, 1, s
->field_select
[0][i
]);
947 mpeg1_encode_motion(s
,
948 s
->mv
[0][i
][0] - s
->last_mv
[0][i
][0],
950 mpeg1_encode_motion(s
,
951 s
->mv
[0][i
][1] - (s
->last_mv
[0][i
][1] >> 1),
953 s
->last_mv
[0][i
][0] = s
->mv
[0][i
][0];
954 s
->last_mv
[0][i
][1] = s
->mv
[0][i
][1] * 2;
958 if (s
->mv_dir
& MV_DIR_BACKWARD
) {
959 for (i
= 0; i
< 2; i
++) {
960 put_bits(&s
->pb
, 1, s
->field_select
[1][i
]);
961 mpeg1_encode_motion(s
,
962 s
->mv
[1][i
][0] - s
->last_mv
[1][i
][0],
964 mpeg1_encode_motion(s
,
965 s
->mv
[1][i
][1] - (s
->last_mv
[1][i
][1] >> 1),
967 s
->last_mv
[1][i
][0] = s
->mv
[1][i
][0];
968 s
->last_mv
[1][i
][1] = s
->mv
[1][i
][1] * 2;
973 s
->mv_bits
+= get_bits_diff(s
);
975 if (s
->chroma_y_shift
) {
977 ff_mpeg12_mbPatTable
[cbp
][1],
978 ff_mpeg12_mbPatTable
[cbp
][0]);
981 ff_mpeg12_mbPatTable
[cbp
>> 2][1],
982 ff_mpeg12_mbPatTable
[cbp
>> 2][0]);
983 put_sbits(&s
->pb
, 2, cbp
);
987 for (i
= 0; i
< mb_block_count
; i
++)
988 if (cbp
& (1 << (mb_block_count
- 1 - i
)))
989 mpeg1_encode_block(s
, block
[i
], i
);
992 s
->i_tex_bits
+= get_bits_diff(s
);
994 s
->p_tex_bits
+= get_bits_diff(s
);
998 void ff_mpeg1_encode_mb(MpegEncContext
*s
, int16_t block
[8][64],
999 int motion_x
, int motion_y
)
1001 if (s
->chroma_format
== CHROMA_420
)
1002 mpeg1_encode_mb_internal(s
, block
, motion_x
, motion_y
, 6);
1004 mpeg1_encode_mb_internal(s
, block
, motion_x
, motion_y
, 8);
1007 av_cold
void ff_mpeg1_encode_init(MpegEncContext
*s
)
1009 static int done
= 0;
1011 ff_mpeg12_common_init(s
);
1019 ff_init_rl(&ff_rl_mpeg1
, ff_mpeg12_static_rl_table_store
[0]);
1020 ff_init_rl(&ff_rl_mpeg2
, ff_mpeg12_static_rl_table_store
[1]);
1022 for (i
= 0; i
< 64; i
++) {
1023 mpeg1_max_level
[0][i
] = ff_rl_mpeg1
.max_level
[0][i
];
1024 mpeg1_index_run
[0][i
] = ff_rl_mpeg1
.index_run
[0][i
];
1027 init_uni_ac_vlc(&ff_rl_mpeg1
, uni_mpeg1_ac_vlc_len
);
1028 if (s
->intra_vlc_format
)
1029 init_uni_ac_vlc(&ff_rl_mpeg2
, uni_mpeg2_ac_vlc_len
);
1031 /* build unified dc encoding tables */
1032 for (i
= -255; i
< 256; i
++) {
1037 adiff
= FFABS(diff
);
1040 index
= av_log2(2 * adiff
);
1042 bits
= ff_mpeg12_vlc_dc_lum_bits
[index
] + index
;
1043 code
= (ff_mpeg12_vlc_dc_lum_code
[index
] << index
) +
1044 (diff
& ((1 << index
) - 1));
1045 mpeg1_lum_dc_uni
[i
+ 255] = bits
+ (code
<< 8);
1047 bits
= ff_mpeg12_vlc_dc_chroma_bits
[index
] + index
;
1048 code
= (ff_mpeg12_vlc_dc_chroma_code
[index
] << index
) +
1049 (diff
& ((1 << index
) - 1));
1050 mpeg1_chr_dc_uni
[i
+ 255] = bits
+ (code
<< 8);
1053 for (f_code
= 1; f_code
<= MAX_FCODE
; f_code
++)
1054 for (mv
= -MAX_MV
; mv
<= MAX_MV
; mv
++) {
1058 len
= ff_mpeg12_mbMotionVectorTable
[0][1];
1060 int val
, bit_size
, code
;
1062 bit_size
= f_code
- 1;
1068 code
= (val
>> bit_size
) + 1;
1070 len
= ff_mpeg12_mbMotionVectorTable
[code
][1] +
1073 len
= ff_mpeg12_mbMotionVectorTable
[16][1] +
1077 mv_penalty
[f_code
][mv
+ MAX_MV
] = len
;
1081 for (f_code
= MAX_FCODE
; f_code
> 0; f_code
--)
1082 for (mv
= -(8 << f_code
); mv
< (8 << f_code
); mv
++)
1083 fcode_tab
[mv
+ MAX_MV
] = f_code
;
1085 s
->me
.mv_penalty
= mv_penalty
;
1086 s
->fcode_tab
= fcode_tab
;
1087 if (s
->codec_id
== AV_CODEC_ID_MPEG1VIDEO
) {
1088 s
->min_qcoeff
= -255;
1089 s
->max_qcoeff
= 255;
1091 s
->min_qcoeff
= -2047;
1092 s
->max_qcoeff
= 2047;
1094 if (s
->intra_vlc_format
) {
1095 s
->intra_ac_vlc_length
=
1096 s
->intra_ac_vlc_last_length
= uni_mpeg2_ac_vlc_len
;
1098 s
->intra_ac_vlc_length
=
1099 s
->intra_ac_vlc_last_length
= uni_mpeg1_ac_vlc_len
;
1101 s
->inter_ac_vlc_length
=
1102 s
->inter_ac_vlc_last_length
= uni_mpeg1_ac_vlc_len
;
1105 #define OFFSET(x) offsetof(MpegEncContext, x)
1106 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1107 #define COMMON_OPTS \
1108 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1109 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1110 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1111 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1112 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1113 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1114 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1115 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1117 static const AVOption mpeg1_options
[] = {
1123 static const AVOption mpeg2_options
[] = {
1125 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type
), AV_OPT_TYPE_INT
, { .i64
= 0 }, 0, 1, VE
},
1126 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan
), AV_OPT_TYPE_INT
, { .i64
= 0 }, 0, 1, VE
},
1127 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext
), AV_OPT_TYPE_INT
, { .i64
= -1 }, -1, 1, VE
, "seq_disp_ext" },
1128 { "auto", NULL
, 0, AV_OPT_TYPE_CONST
, {.i64
= -1}, 0, 0, VE
, "seq_disp_ext" },
1129 { "never", NULL
, 0, AV_OPT_TYPE_CONST
, {.i64
= 0 }, 0, 0, VE
, "seq_disp_ext" },
1130 { "always", NULL
, 0, AV_OPT_TYPE_CONST
, {.i64
= 1 }, 0, 0, VE
, "seq_disp_ext" },
1135 #define mpeg12_class(x) \
1136 static const AVClass mpeg ## x ## _class = { \
1137 .class_name = "mpeg" # x "video encoder", \
1138 .item_name = av_default_item_name, \
1139 .option = mpeg ## x ## _options, \
1140 .version = LIBAVUTIL_VERSION_INT, \
1146 AVCodec ff_mpeg1video_encoder
= {
1147 .name
= "mpeg1video",
1148 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1149 .type
= AVMEDIA_TYPE_VIDEO
,
1150 .id
= AV_CODEC_ID_MPEG1VIDEO
,
1151 .priv_data_size
= sizeof(MpegEncContext
),
1152 .init
= encode_init
,
1153 .encode2
= ff_mpv_encode_picture
,
1154 .close
= ff_mpv_encode_end
,
1155 .supported_framerates
= ff_mpeg12_frame_rate_tab
+ 1,
1156 .pix_fmts
= (const enum AVPixelFormat
[]) { AV_PIX_FMT_YUV420P
,
1158 .capabilities
= CODEC_CAP_DELAY
| CODEC_CAP_SLICE_THREADS
,
1159 .priv_class
= &mpeg1_class
,
1162 AVCodec ff_mpeg2video_encoder
= {
1163 .name
= "mpeg2video",
1164 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1165 .type
= AVMEDIA_TYPE_VIDEO
,
1166 .id
= AV_CODEC_ID_MPEG2VIDEO
,
1167 .priv_data_size
= sizeof(MpegEncContext
),
1168 .init
= encode_init
,
1169 .encode2
= ff_mpv_encode_picture
,
1170 .close
= ff_mpv_encode_end
,
1171 .supported_framerates
= ff_mpeg2_frame_rate_tab
,
1172 .pix_fmts
= (const enum AVPixelFormat
[]) { AV_PIX_FMT_YUV420P
,
1175 .capabilities
= CODEC_CAP_DELAY
| CODEC_CAP_SLICE_THREADS
,
1176 .priv_class
= &mpeg2_class
,