3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #if CONFIG_VOBSUB_DEMUXER
27 # include "subtitles.h"
28 # include "libavutil/bprint.h"
33 #include "libavutil/avassert.h"
35 /*********************************************/
38 #define MAX_SYNC_SIZE 100000
40 static int check_pes(const uint8_t *p
, const uint8_t *end
)
43 int pes2
= (p
[3] & 0xC0) == 0x80 &&
44 (p
[4] & 0xC0) != 0x40 &&
45 ((p
[4] & 0xC0) == 0x00 ||
46 (p
[4] & 0xC0) >> 2 == (p
[6] & 0xF0));
48 for (p
+= 3; p
< end
&& *p
== 0xFF; p
++) ;
49 if ((*p
& 0xC0) == 0x40)
52 if ((*p
& 0xF0) == 0x20)
53 pes1
= p
[0] & p
[2] & p
[4] & 1;
54 else if ((*p
& 0xF0) == 0x30)
55 pes1
= p
[0] & p
[2] & p
[4] & p
[5] & p
[7] & p
[9] & 1;
62 static int check_pack_header(const uint8_t *buf
)
64 return (buf
[1] & 0xC0) == 0x40 || (buf
[1] & 0xF0) == 0x20;
67 static int mpegps_probe(AVProbeData
*p
)
71 int sys
= 0, pspack
= 0, priv1
= 0, vid
= 0;
72 int audio
= 0, invalid
= 0, score
= 0;
74 for (i
= 0; i
< p
->buf_size
; i
++) {
75 code
= (code
<< 8) + p
->buf
[i
];
76 if ((code
& 0xffffff00) == 0x100) {
77 int len
= p
->buf
[i
+ 1] << 8 | p
->buf
[i
+ 2];
78 int pes
= check_pes(p
->buf
+ i
, p
->buf
+ p
->buf_size
);
79 int pack
= check_pack_header(p
->buf
+ i
);
81 if (code
== SYSTEM_HEADER_START_CODE
)
83 else if (code
== PACK_START_CODE
&& pack
)
85 else if ((code
& 0xf0) == VIDEO_ID
&& pes
)
87 // skip pes payload to avoid start code emulation for private
89 else if ((code
& 0xe0) == AUDIO_ID
&& pes
) {audio
++; i
+=len
;}
90 else if (code
== PRIVATE_STREAM_1
&& pes
) {priv1
++; i
+=len
;}
91 else if (code
== 0x1fd && pes
) vid
++; //VC1
93 else if ((code
& 0xf0) == VIDEO_ID
&& !pes
) invalid
++;
94 else if ((code
& 0xe0) == AUDIO_ID
&& !pes
) invalid
++;
95 else if (code
== PRIVATE_STREAM_1
&& !pes
) invalid
++;
99 if (vid
+ audio
> invalid
+ 1) /* invalid VDR files nd short PES streams */
100 score
= AVPROBE_SCORE_EXTENSION
/ 2;
102 if (sys
> invalid
&& sys
* 9 <= pspack
* 10)
103 return (audio
> 12 || vid
> 3 || pspack
> 2) ? AVPROBE_SCORE_EXTENSION
+ 2
104 : AVPROBE_SCORE_EXTENSION
/ 2 + 1; // 1 more than mp3
105 if (pspack
> invalid
&& (priv1
+ vid
+ audio
) * 10 >= pspack
* 9)
106 return pspack
> 2 ? AVPROBE_SCORE_EXTENSION
+ 2
107 : AVPROBE_SCORE_EXTENSION
/ 2; // 1 more than .mpg
108 if ((!!vid
^ !!audio
) && (audio
> 4 || vid
> 1) && !sys
&&
109 !pspack
&& p
->buf_size
> 2048 && vid
+ audio
> invalid
) /* PES stream */
110 return (audio
> 12 || vid
> 3 + 2 * invalid
) ? AVPROBE_SCORE_EXTENSION
+ 2
111 : AVPROBE_SCORE_EXTENSION
/ 2;
113 // 02-Penguin.flac has sys:0 priv1:0 pspack:0 vid:0 audio:1
114 // mp3_misidentified_2.mp3 has sys:0 priv1:0 pspack:0 vid:0 audio:6
115 // Have\ Yourself\ a\ Merry\ Little\ Christmas.mp3 0 0 0 5 0 1 len:21618
119 typedef struct MpegDemuxContext
{
120 int32_t header_state
;
121 unsigned char psm_es_type
[256];
125 #if CONFIG_VOBSUB_DEMUXER
126 AVFormatContext
*sub_ctx
;
127 FFDemuxSubtitlesQueue q
[32];
131 static int mpegps_read_header(AVFormatContext
*s
)
133 MpegDemuxContext
*m
= s
->priv_data
;
135 int64_t last_pos
= avio_tell(s
->pb
);
137 m
->header_state
= 0xff;
138 s
->ctx_flags
|= AVFMTCTX_NOHEADER
;
140 avio_get_str(s
->pb
, 6, buffer
, sizeof(buffer
));
141 if (!memcmp("IMKH", buffer
, 4)) {
143 } else if (!memcmp("Sofdec", buffer
, 6)) {
146 avio_seek(s
->pb
, last_pos
, SEEK_SET
);
148 /* no need to do more */
152 static int64_t get_pts(AVIOContext
*pb
, int c
)
156 buf
[0] = c
< 0 ? avio_r8(pb
) : c
;
157 avio_read(pb
, buf
+ 1, 4);
159 return ff_parse_pes_pts(buf
);
162 static int find_next_start_code(AVIOContext
*pb
, int *size_ptr
,
163 int32_t *header_state
)
165 unsigned int state
, v
;
168 state
= *header_state
;
175 if (state
== 0x000001) {
176 state
= ((state
<< 8) | v
) & 0xffffff;
180 state
= ((state
<< 8) | v
) & 0xffffff;
185 *header_state
= state
;
191 * Extract stream types from a program stream map
192 * According to ISO/IEC 13818-1 ('MPEG-2 Systems') table 2-35
194 * @return number of bytes occupied by PSM in the bitstream
196 static long mpegps_psm_parse(MpegDemuxContext
*m
, AVIOContext
*pb
)
198 int psm_length
, ps_info_length
, es_map_length
;
200 psm_length
= avio_rb16(pb
);
203 ps_info_length
= avio_rb16(pb
);
205 /* skip program_stream_info */
206 avio_skip(pb
, ps_info_length
);
207 es_map_length
= avio_rb16(pb
);
208 /* Ignore es_map_length, trust psm_length */
209 es_map_length
= psm_length
- ps_info_length
- 10;
211 /* at least one es available? */
212 while (es_map_length
>= 4) {
213 unsigned char type
= avio_r8(pb
);
214 unsigned char es_id
= avio_r8(pb
);
215 uint16_t es_info_length
= avio_rb16(pb
);
217 /* remember mapping from stream id to stream type */
218 m
->psm_es_type
[es_id
] = type
;
219 /* skip program_stream_info */
220 avio_skip(pb
, es_info_length
);
221 es_map_length
-= 4 + es_info_length
;
223 avio_rb32(pb
); /* crc32 */
224 return 2 + psm_length
;
227 /* read the next PES header. Return its position in ppos
228 * (if not NULL), and its start code, pts and dts.
230 static int mpegps_read_pes_header(AVFormatContext
*s
,
231 int64_t *ppos
, int *pstart_code
,
232 int64_t *ppts
, int64_t *pdts
)
234 MpegDemuxContext
*m
= s
->priv_data
;
235 int len
, size
, startcode
, c
, flags
, header_len
;
236 int pes_ext
, ext2_len
, id_ext
, skip
;
238 int64_t last_sync
= avio_tell(s
->pb
);
241 avio_seek(s
->pb
, last_sync
, SEEK_SET
);
243 /* next start code (should be immediately after) */
244 m
->header_state
= 0xff;
245 size
= MAX_SYNC_SIZE
;
246 startcode
= find_next_start_code(s
->pb
, &size
, &m
->header_state
);
247 last_sync
= avio_tell(s
->pb
);
249 if (avio_feof(s
->pb
))
251 // FIXME we should remember header_state
252 return AVERROR(EAGAIN
);
255 if (startcode
== PACK_START_CODE
)
257 if (startcode
== SYSTEM_HEADER_START_CODE
)
259 if (startcode
== PADDING_STREAM
) {
260 avio_skip(s
->pb
, avio_rb16(s
->pb
));
263 if (startcode
== PRIVATE_STREAM_2
) {
265 /* Need to detect whether this from a DVD or a 'Sofdec' stream */
266 int len
= avio_rb16(s
->pb
);
268 uint8_t *ps2buf
= av_malloc(len
);
271 bytesread
= avio_read(s
->pb
, ps2buf
, len
);
273 if (bytesread
!= len
) {
274 avio_skip(s
->pb
, len
- bytesread
);
278 p
= memchr(ps2buf
, 'S', len
- 5);
281 m
->sofdec
= !memcmp(p
+1, "ofdec", 5);
283 m
->sofdec
-= !m
->sofdec
;
286 if (len
== 980 && ps2buf
[0] == 0) {
288 uint32_t startpts
= AV_RB32(ps2buf
+ 0x0d);
289 uint32_t endpts
= AV_RB32(ps2buf
+ 0x11);
290 uint8_t hours
= ((ps2buf
[0x19] >> 4) * 10) + (ps2buf
[0x19] & 0x0f);
291 uint8_t mins
= ((ps2buf
[0x1a] >> 4) * 10) + (ps2buf
[0x1a] & 0x0f);
292 uint8_t secs
= ((ps2buf
[0x1b] >> 4) * 10) + (ps2buf
[0x1b] & 0x0f);
294 m
->dvd
= (hours
<= 23 &&
297 (ps2buf
[0x19] & 0x0f) < 10 &&
298 (ps2buf
[0x1a] & 0x0f) < 10 &&
299 (ps2buf
[0x1b] & 0x0f) < 10 &&
301 } else if (len
== 1018 && ps2buf
[0] == 1) {
303 uint8_t hours
= ((ps2buf
[0x1d] >> 4) * 10) + (ps2buf
[0x1d] & 0x0f);
304 uint8_t mins
= ((ps2buf
[0x1e] >> 4) * 10) + (ps2buf
[0x1e] & 0x0f);
305 uint8_t secs
= ((ps2buf
[0x1f] >> 4) * 10) + (ps2buf
[0x1f] & 0x0f);
307 m
->dvd
= (hours
<= 23 &&
310 (ps2buf
[0x1d] & 0x0f) < 10 &&
311 (ps2buf
[0x1e] & 0x0f) < 10 &&
312 (ps2buf
[0x1f] & 0x0f) < 10);
319 /* If this isn't a DVD packet or no memory
320 * could be allocated, just ignore it.
321 * If we did, move back to the start of the
322 * packet (plus 'length' field) */
323 if (!m
->dvd
|| avio_skip(s
->pb
, -(len
+ 2)) < 0) {
325 * This packet will be lost but that can't be helped
326 * if we can't skip back
332 avio_skip(s
->pb
, len
);
335 } else if (!m
->dvd
) {
336 int len
= avio_rb16(s
->pb
);
337 avio_skip(s
->pb
, len
);
341 if (startcode
== PROGRAM_STREAM_MAP
) {
342 mpegps_psm_parse(m
, s
->pb
);
346 /* find matching stream */
347 if (!((startcode
>= 0x1c0 && startcode
<= 0x1df) ||
348 (startcode
>= 0x1e0 && startcode
<= 0x1ef) ||
349 (startcode
== 0x1bd) ||
350 (startcode
== PRIVATE_STREAM_2
) ||
351 (startcode
== 0x1fd)))
354 *ppos
= avio_tell(s
->pb
) - 4;
356 len
= avio_rb16(s
->pb
);
358 dts
= AV_NOPTS_VALUE
;
359 if (startcode
!= PRIVATE_STREAM_2
)
367 /* XXX: for mpeg1, should test only bit 7 */
371 if ((c
& 0xc0) == 0x40) {
372 /* buffer scale & size */
377 if ((c
& 0xe0) == 0x20) {
379 pts
= get_pts(s
->pb
, c
);
382 dts
= get_pts(s
->pb
, -1);
385 } else if ((c
& 0xc0) == 0x80) {
387 flags
= avio_r8(s
->pb
);
388 header_len
= avio_r8(s
->pb
);
390 if (header_len
> len
)
394 dts
= pts
= get_pts(s
->pb
, -1);
397 dts
= get_pts(s
->pb
, -1);
401 if (flags
& 0x3f && header_len
== 0) {
403 av_log(s
, AV_LOG_WARNING
, "Further flags set but no bytes left\n");
405 if (flags
& 0x01) { /* PES extension */
406 pes_ext
= avio_r8(s
->pb
);
408 /* Skip PES private data, program packet sequence counter
409 * and P-STD buffer */
410 skip
= (pes_ext
>> 4) & 0xb;
412 if (pes_ext
& 0x40 || skip
> header_len
) {
413 av_log(s
, AV_LOG_WARNING
, "pes_ext %X is invalid\n", pes_ext
);
416 avio_skip(s
->pb
, skip
);
419 if (pes_ext
& 0x01) { /* PES extension 2 */
420 ext2_len
= avio_r8(s
->pb
);
422 if ((ext2_len
& 0x7f) > 0) {
423 id_ext
= avio_r8(s
->pb
);
424 if ((id_ext
& 0x80) == 0)
425 startcode
= ((startcode
& 0xff) << 8) | id_ext
;
432 avio_skip(s
->pb
, header_len
);
437 if (startcode
== PRIVATE_STREAM_1
) {
438 startcode
= avio_r8(s
->pb
);
443 if (dts
!= AV_NOPTS_VALUE
&& ppos
) {
445 for (i
= 0; i
< s
->nb_streams
; i
++) {
446 if (startcode
== s
->streams
[i
]->id
&&
447 s
->pb
->seekable
/* index useless on streams anyway */) {
448 ff_reduce_index(s
, i
);
449 av_add_index_entry(s
->streams
[i
], *ppos
, dts
, 0, 0,
450 AVINDEX_KEYFRAME
/* FIXME keyframe? */);
455 *pstart_code
= startcode
;
461 static int mpegps_read_packet(AVFormatContext
*s
,
464 MpegDemuxContext
*m
= s
->priv_data
;
466 int len
, startcode
, i
, es_type
, ret
;
467 int lpcm_header_len
= -1; //Init to suppress warning
468 int request_probe
= 0;
469 enum AVCodecID codec_id
= AV_CODEC_ID_NONE
;
470 enum AVMediaType type
;
471 int64_t pts
, dts
, dummy_pos
; // dummy_pos is needed for the index building to work
474 len
= mpegps_read_pes_header(s
, &dummy_pos
, &startcode
, &pts
, &dts
);
478 if (startcode
>= 0x80 && startcode
<= 0xcf) {
482 /* audio: skip header */
484 lpcm_header_len
= avio_rb16(s
->pb
);
486 if (startcode
>= 0xb0 && startcode
<= 0xbf) {
487 /* MLP/TrueHD audio has a 4-byte header */
493 /* now find stream */
494 for (i
= 0; i
< s
->nb_streams
; i
++) {
496 if (st
->id
== startcode
)
500 es_type
= m
->psm_es_type
[startcode
& 0xff];
501 if (es_type
== STREAM_TYPE_VIDEO_MPEG1
) {
502 codec_id
= AV_CODEC_ID_MPEG2VIDEO
;
503 type
= AVMEDIA_TYPE_VIDEO
;
504 } else if (es_type
== STREAM_TYPE_VIDEO_MPEG2
) {
505 codec_id
= AV_CODEC_ID_MPEG2VIDEO
;
506 type
= AVMEDIA_TYPE_VIDEO
;
507 } else if (es_type
== STREAM_TYPE_AUDIO_MPEG1
||
508 es_type
== STREAM_TYPE_AUDIO_MPEG2
) {
509 codec_id
= AV_CODEC_ID_MP3
;
510 type
= AVMEDIA_TYPE_AUDIO
;
511 } else if (es_type
== STREAM_TYPE_AUDIO_AAC
) {
512 codec_id
= AV_CODEC_ID_AAC
;
513 type
= AVMEDIA_TYPE_AUDIO
;
514 } else if (es_type
== STREAM_TYPE_VIDEO_MPEG4
) {
515 codec_id
= AV_CODEC_ID_MPEG4
;
516 type
= AVMEDIA_TYPE_VIDEO
;
517 } else if (es_type
== STREAM_TYPE_VIDEO_H264
) {
518 codec_id
= AV_CODEC_ID_H264
;
519 type
= AVMEDIA_TYPE_VIDEO
;
520 } else if (es_type
== STREAM_TYPE_AUDIO_AC3
) {
521 codec_id
= AV_CODEC_ID_AC3
;
522 type
= AVMEDIA_TYPE_AUDIO
;
523 } else if (m
->imkh_cctv
&& es_type
== 0x91) {
524 codec_id
= AV_CODEC_ID_PCM_MULAW
;
525 type
= AVMEDIA_TYPE_AUDIO
;
526 } else if (startcode
>= 0x1e0 && startcode
<= 0x1ef) {
527 static const unsigned char avs_seqh
[4] = { 0, 0, 1, 0xb0 };
528 unsigned char buf
[8];
530 avio_read(s
->pb
, buf
, 8);
531 avio_seek(s
->pb
, -8, SEEK_CUR
);
532 if (!memcmp(buf
, avs_seqh
, 4) && (buf
[6] != 0 || buf
[7] != 1))
533 codec_id
= AV_CODEC_ID_CAVS
;
536 type
= AVMEDIA_TYPE_VIDEO
;
537 } else if (startcode
== PRIVATE_STREAM_2
) {
538 type
= AVMEDIA_TYPE_DATA
;
539 codec_id
= AV_CODEC_ID_DVD_NAV
;
540 } else if (startcode
>= 0x1c0 && startcode
<= 0x1df) {
541 type
= AVMEDIA_TYPE_AUDIO
;
543 codec_id
= AV_CODEC_ID_ADPCM_ADX
;
547 codec_id
= AV_CODEC_ID_MP2
;
549 } else if (startcode
>= 0x80 && startcode
<= 0x87) {
550 type
= AVMEDIA_TYPE_AUDIO
;
551 codec_id
= AV_CODEC_ID_AC3
;
552 } else if ((startcode
>= 0x88 && startcode
<= 0x8f) ||
553 (startcode
>= 0x98 && startcode
<= 0x9f)) {
554 /* 0x90 - 0x97 is reserved for SDDS in DVD specs */
555 type
= AVMEDIA_TYPE_AUDIO
;
556 codec_id
= AV_CODEC_ID_DTS
;
557 } else if (startcode
>= 0xa0 && startcode
<= 0xaf) {
558 type
= AVMEDIA_TYPE_AUDIO
;
559 if (lpcm_header_len
== 6) {
560 codec_id
= AV_CODEC_ID_MLP
;
562 codec_id
= AV_CODEC_ID_PCM_DVD
;
564 } else if (startcode
>= 0xb0 && startcode
<= 0xbf) {
565 type
= AVMEDIA_TYPE_AUDIO
;
566 codec_id
= AV_CODEC_ID_TRUEHD
;
567 } else if (startcode
>= 0xc0 && startcode
<= 0xcf) {
568 /* Used for both AC-3 and E-AC-3 in EVOB files */
569 type
= AVMEDIA_TYPE_AUDIO
;
570 codec_id
= AV_CODEC_ID_AC3
;
571 } else if (startcode
>= 0x20 && startcode
<= 0x3f) {
572 type
= AVMEDIA_TYPE_SUBTITLE
;
573 codec_id
= AV_CODEC_ID_DVD_SUBTITLE
;
574 } else if (startcode
>= 0xfd55 && startcode
<= 0xfd5f) {
575 type
= AVMEDIA_TYPE_VIDEO
;
576 codec_id
= AV_CODEC_ID_VC1
;
580 avio_skip(s
->pb
, len
);
583 /* no stream found: add a new stream */
584 st
= avformat_new_stream(s
, NULL
);
588 st
->codec
->codec_type
= type
;
589 st
->codec
->codec_id
= codec_id
;
590 if (st
->codec
->codec_id
== AV_CODEC_ID_PCM_MULAW
) {
591 st
->codec
->channels
= 1;
592 st
->codec
->channel_layout
= AV_CH_LAYOUT_MONO
;
593 st
->codec
->sample_rate
= 8000;
595 st
->request_probe
= request_probe
;
596 st
->need_parsing
= AVSTREAM_PARSE_FULL
;
599 if (st
->discard
>= AVDISCARD_ALL
)
601 if (startcode
>= 0xa0 && startcode
<= 0xaf) {
602 if (lpcm_header_len
== 6 && st
->codec
->codec_id
== AV_CODEC_ID_MLP
) {
609 ret
= av_get_packet(s
->pb
, pkt
, len
);
613 pkt
->pos
= dummy_pos
;
614 pkt
->stream_index
= st
->index
;
615 av_dlog(s
, "%d: pts=%0.3f dts=%0.3f size=%d\n",
616 pkt
->stream_index
, pkt
->pts
/ 90000.0, pkt
->dts
/ 90000.0,
619 return (ret
< 0) ? ret
: 0;
622 static int64_t mpegps_read_dts(AVFormatContext
*s
, int stream_index
,
623 int64_t *ppos
, int64_t pos_limit
)
626 int64_t pos
, pts
, dts
;
629 if (avio_seek(s
->pb
, pos
, SEEK_SET
) < 0)
630 return AV_NOPTS_VALUE
;
633 len
= mpegps_read_pes_header(s
, &pos
, &startcode
, &pts
, &dts
);
635 av_dlog(s
, "none (ret=%d)\n", len
);
636 return AV_NOPTS_VALUE
;
638 if (startcode
== s
->streams
[stream_index
]->id
&&
639 dts
!= AV_NOPTS_VALUE
) {
642 avio_skip(s
->pb
, len
);
644 av_dlog(s
, "pos=0x%"PRIx64
" dts=0x%"PRIx64
" %0.3f\n",
645 pos
, dts
, dts
/ 90000.0);
650 AVInputFormat ff_mpegps_demuxer
= {
652 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-PS (MPEG-2 Program Stream)"),
653 .priv_data_size
= sizeof(MpegDemuxContext
),
654 .read_probe
= mpegps_probe
,
655 .read_header
= mpegps_read_header
,
656 .read_packet
= mpegps_read_packet
,
657 .read_timestamp
= mpegps_read_dts
,
658 .flags
= AVFMT_SHOW_IDS
| AVFMT_TS_DISCONT
,
661 #if CONFIG_VOBSUB_DEMUXER
663 #define REF_STRING "# VobSub index file,"
664 #define MAX_LINE_SIZE 2048
666 static int vobsub_probe(AVProbeData
*p
)
668 if (!strncmp(p
->buf
, REF_STRING
, sizeof(REF_STRING
) - 1))
669 return AVPROBE_SCORE_MAX
;
673 static int vobsub_read_header(AVFormatContext
*s
)
675 int i
, ret
= 0, header_parsed
= 0, langidx
= 0;
676 MpegDemuxContext
*vobsub
= s
->priv_data
;
677 char *sub_name
= NULL
;
679 char *ext
, *header_str
;
685 char alt
[MAX_LINE_SIZE
] = {0};
686 AVInputFormat
*iformat
;
688 sub_name
= av_strdup(s
->filename
);
689 fname_len
= strlen(sub_name
);
690 ext
= sub_name
- 3 + fname_len
;
691 if (fname_len
< 4 || *(ext
- 1) != '.') {
692 av_log(s
, AV_LOG_ERROR
, "The input index filename is too short "
693 "to guess the associated .SUB file\n");
694 ret
= AVERROR_INVALIDDATA
;
697 memcpy(ext
, !strncmp(ext
, "IDX", 3) ? "SUB" : "sub", 3);
698 av_log(s
, AV_LOG_VERBOSE
, "IDX/SUB: %s -> %s\n", s
->filename
, sub_name
);
700 if (!(iformat
= av_find_input_format("mpeg"))) {
701 ret
= AVERROR_DEMUXER_NOT_FOUND
;
705 vobsub
->sub_ctx
= avformat_alloc_context();
706 if (!vobsub
->sub_ctx
) {
707 ret
= AVERROR(ENOMEM
);
711 if ((ret
= ff_copy_whitelists(vobsub
->sub_ctx
, s
)) < 0)
714 ret
= avformat_open_input(&vobsub
->sub_ctx
, sub_name
, iformat
, NULL
);
716 av_log(s
, AV_LOG_ERROR
, "Unable to open %s as MPEG subtitles\n", sub_name
);
720 av_bprint_init(&header
, 0, AV_BPRINT_SIZE_UNLIMITED
);
721 while (!avio_feof(s
->pb
)) {
722 char line
[MAX_LINE_SIZE
];
723 int len
= ff_get_line(s
->pb
, line
, sizeof(line
));
728 line
[strcspn(line
, "\r\n")] = 0;
730 if (!strncmp(line
, "id:", 3)) {
731 if (sscanf(line
, "id: %63[^,], index: %u", id
, &stream_id
) != 2) {
732 av_log(s
, AV_LOG_WARNING
, "Unable to parse index line '%s', "
733 "assuming 'id: und, index: 0'\n", line
);
738 if (stream_id
>= FF_ARRAY_ELEMS(vobsub
->q
)) {
739 av_log(s
, AV_LOG_ERROR
, "Maximum number of subtitles streams reached\n");
740 ret
= AVERROR(EINVAL
);
746 /* We do not create the stream immediately to avoid adding empty
747 * streams. See the following timestamp entry. */
749 av_log(s
, AV_LOG_DEBUG
, "IDX stream[%d] id=%s\n", stream_id
, id
);
751 } else if (!strncmp(line
, "timestamp:", 10)) {
754 int64_t pos
, timestamp
;
755 const char *p
= line
+ 10;
757 if (stream_id
== -1) {
758 av_log(s
, AV_LOG_ERROR
, "Timestamp declared before any stream\n");
759 ret
= AVERROR_INVALIDDATA
;
763 if (!st
|| st
->id
!= stream_id
) {
764 st
= avformat_new_stream(s
, NULL
);
766 ret
= AVERROR(ENOMEM
);
770 st
->codec
->codec_type
= AVMEDIA_TYPE_SUBTITLE
;
771 st
->codec
->codec_id
= AV_CODEC_ID_DVD_SUBTITLE
;
772 avpriv_set_pts_info(st
, 64, 1, 1000);
773 av_dict_set(&st
->metadata
, "language", id
, 0);
775 av_dict_set(&st
->metadata
, "title", alt
, 0);
778 if (sscanf(p
, "%02d:%02d:%02d:%03d, filepos: %"SCNx64
,
779 &hh
, &mm
, &ss
, &ms
, &pos
) != 5) {
780 av_log(s
, AV_LOG_ERROR
, "Unable to parse timestamp line '%s', "
781 "abort parsing\n", line
);
782 ret
= AVERROR_INVALIDDATA
;
785 timestamp
= (hh
*3600LL + mm
*60LL + ss
) * 1000LL + ms
+ delay
;
786 timestamp
= av_rescale_q(timestamp
, av_make_q(1, 1000), st
->time_base
);
788 sub
= ff_subtitles_queue_insert(&vobsub
->q
[s
->nb_streams
- 1], "", 0, 0);
790 ret
= AVERROR(ENOMEM
);
794 sub
->pts
= timestamp
;
795 sub
->stream_index
= s
->nb_streams
- 1;
797 } else if (!strncmp(line
, "alt:", 4)) {
798 const char *p
= line
+ 4;
802 av_log(s
, AV_LOG_DEBUG
, "IDX stream[%d] name=%s\n", stream_id
, p
);
803 av_strlcpy(alt
, p
, sizeof(alt
));
806 } else if (!strncmp(line
, "delay:", 6)) {
807 int sign
= 1, hh
= 0, mm
= 0, ss
= 0, ms
= 0;
808 const char *p
= line
+ 6;
812 if (*p
== '-' || *p
== '+') {
813 sign
= *p
== '-' ? -1 : 1;
816 sscanf(p
, "%d:%d:%d:%d", &hh
, &mm
, &ss
, &ms
);
817 delay
= ((hh
*3600LL + mm
*60LL + ss
) * 1000LL + ms
) * sign
;
819 } else if (!strncmp(line
, "langidx:", 8)) {
820 const char *p
= line
+ 8;
822 if (sscanf(p
, "%d", &langidx
) != 1)
823 av_log(s
, AV_LOG_ERROR
, "Invalid langidx specified\n");
825 } else if (!header_parsed
) {
826 if (line
[0] && line
[0] != '#')
827 av_bprintf(&header
, "%s\n", line
);
831 if (langidx
< s
->nb_streams
)
832 s
->streams
[langidx
]->disposition
|= AV_DISPOSITION_DEFAULT
;
834 for (i
= 0; i
< s
->nb_streams
; i
++) {
835 vobsub
->q
[i
].sort
= SUB_SORT_POS_TS
;
836 ff_subtitles_queue_finalize(&vobsub
->q
[i
]);
839 if (!av_bprint_is_complete(&header
)) {
840 av_bprint_finalize(&header
, NULL
);
841 ret
= AVERROR(ENOMEM
);
844 av_bprint_finalize(&header
, &header_str
);
845 for (i
= 0; i
< s
->nb_streams
; i
++) {
846 AVStream
*sub_st
= s
->streams
[i
];
847 sub_st
->codec
->extradata
= av_strdup(header_str
);
848 sub_st
->codec
->extradata_size
= header
.len
;
857 static int vobsub_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
859 MpegDemuxContext
*vobsub
= s
->priv_data
;
860 FFDemuxSubtitlesQueue
*q
;
861 AVIOContext
*pb
= vobsub
->sub_ctx
->pb
;
862 int ret
, psize
, total_read
= 0, i
;
865 int64_t min_ts
= INT64_MAX
;
867 for (i
= 0; i
< s
->nb_streams
; i
++) {
868 FFDemuxSubtitlesQueue
*tmpq
= &vobsub
->q
[i
];
870 av_assert0(tmpq
->nb_subs
);
871 ts
= tmpq
->subs
[tmpq
->current_sub_idx
].pts
;
878 ret
= ff_subtitles_queue_read_packet(q
, &idx_pkt
);
882 /* compute maximum packet size using the next packet position. This is
883 * useful when the len in the header is non-sense */
884 if (q
->current_sub_idx
< q
->nb_subs
) {
885 psize
= q
->subs
[q
->current_sub_idx
].pos
- idx_pkt
.pos
;
887 int64_t fsize
= avio_size(pb
);
888 psize
= fsize
< 0 ? 0xffff : fsize
- idx_pkt
.pos
;
891 avio_seek(pb
, idx_pkt
.pos
, SEEK_SET
);
898 int n
, to_read
, startcode
;
900 int64_t old_pos
= avio_tell(pb
), new_pos
;
903 ret
= mpegps_read_pes_header(vobsub
->sub_ctx
, NULL
, &startcode
, &pts
, &dts
);
905 if (pkt
->size
) // raise packet even if incomplete
909 to_read
= ret
& 0xffff;
910 new_pos
= avio_tell(pb
);
911 pkt_size
= ret
+ (new_pos
- old_pos
);
913 /* this prevents reads above the current packet */
914 if (total_read
+ pkt_size
> psize
)
916 total_read
+= pkt_size
;
918 /* the current chunk doesn't match the stream index (unlikely) */
919 if ((startcode
& 0x1f) != idx_pkt
.stream_index
)
922 ret
= av_grow_packet(pkt
, to_read
);
926 n
= avio_read(pb
, pkt
->data
+ (pkt
->size
- to_read
), to_read
);
928 pkt
->size
-= to_read
- n
;
929 } while (total_read
< psize
);
931 pkt
->pts
= pkt
->dts
= idx_pkt
.pts
;
932 pkt
->pos
= idx_pkt
.pos
;
933 pkt
->stream_index
= idx_pkt
.stream_index
;
935 av_free_packet(&idx_pkt
);
940 av_free_packet(&idx_pkt
);
944 static int vobsub_read_seek(AVFormatContext
*s
, int stream_index
,
945 int64_t min_ts
, int64_t ts
, int64_t max_ts
, int flags
)
947 MpegDemuxContext
*vobsub
= s
->priv_data
;
949 /* Rescale requested timestamps based on the first stream (timebase is the
950 * same for all subtitles stream within a .idx/.sub). Rescaling is done just
951 * like in avformat_seek_file(). */
952 if (stream_index
== -1 && s
->nb_streams
!= 1) {
954 AVRational time_base
= s
->streams
[0]->time_base
;
955 ts
= av_rescale_q(ts
, AV_TIME_BASE_Q
, time_base
);
956 min_ts
= av_rescale_rnd(min_ts
, time_base
.den
,
957 time_base
.num
* (int64_t)AV_TIME_BASE
,
958 AV_ROUND_UP
| AV_ROUND_PASS_MINMAX
);
959 max_ts
= av_rescale_rnd(max_ts
, time_base
.den
,
960 time_base
.num
* (int64_t)AV_TIME_BASE
,
961 AV_ROUND_DOWN
| AV_ROUND_PASS_MINMAX
);
962 for (i
= 0; i
< s
->nb_streams
; i
++) {
963 int r
= ff_subtitles_queue_seek(&vobsub
->q
[i
], s
, stream_index
,
964 min_ts
, ts
, max_ts
, flags
);
971 if (stream_index
== -1) // only 1 stream
973 return ff_subtitles_queue_seek(&vobsub
->q
[stream_index
], s
, stream_index
,
974 min_ts
, ts
, max_ts
, flags
);
977 static int vobsub_read_close(AVFormatContext
*s
)
980 MpegDemuxContext
*vobsub
= s
->priv_data
;
982 for (i
= 0; i
< s
->nb_streams
; i
++)
983 ff_subtitles_queue_clean(&vobsub
->q
[i
]);
985 avformat_close_input(&vobsub
->sub_ctx
);
989 AVInputFormat ff_vobsub_demuxer
= {
991 .long_name
= NULL_IF_CONFIG_SMALL("VobSub subtitle format"),
992 .priv_data_size
= sizeof(MpegDemuxContext
),
993 .read_probe
= vobsub_probe
,
994 .read_header
= vobsub_read_header
,
995 .read_packet
= vobsub_read_packet
,
996 .read_seek2
= vobsub_read_seek
,
997 .read_close
= vobsub_read_close
,
998 .flags
= AVFMT_SHOW_IDS
,