3 * Copyright (c) 2001 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
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/bswap.h"
35 typedef struct AVIStream
{
36 int64_t frame_offset
; /* current frame (video) or byte (audio) counter
37 (used to compute the pts) */
43 int sample_size
; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
45 int64_t cum_len
; /* temporary storage (used during seek) */
47 int prefix
; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
63 DVDemuxContext
* dv_demux
;
66 static const char avi_headers
[][8] = {
67 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
68 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
69 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19},
70 { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' },
71 { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' },
75 static int avi_load_index(AVFormatContext
*s
);
76 static int guess_ni_flag(AVFormatContext
*s
);
79 static void print_tag(const char *str
, unsigned int tag
, int size
)
81 printf("%s: tag=%c%c%c%c size=0x%x\n",
90 static int get_riff(AVFormatContext
*s
, ByteIOContext
*pb
)
92 AVIContext
*avi
= s
->priv_data
;
96 /* check RIFF header */
97 get_buffer(pb
, header
, 4);
98 avi
->riff_end
= get_le32(pb
); /* RIFF chunk size */
99 avi
->riff_end
+= url_ftell(pb
); /* RIFF chunk end */
100 get_buffer(pb
, header
+4, 4);
102 for(i
=0; avi_headers
[i
][0]; i
++)
103 if(!memcmp(header
, avi_headers
[i
], 8))
105 if(!avi_headers
[i
][0])
108 if(header
[7] == 0x19)
109 av_log(s
, AV_LOG_INFO
, "This file has been generated by a totally broken muxer.\n");
114 static int read_braindead_odml_indx(AVFormatContext
*s
, int frame_num
){
115 AVIContext
*avi
= s
->priv_data
;
116 ByteIOContext
*pb
= s
->pb
;
117 int longs_pre_entry
= get_le16(pb
);
118 int index_sub_type
= get_byte(pb
);
119 int index_type
= get_byte(pb
);
120 int entries_in_use
= get_le32(pb
);
121 int chunk_id
= get_le32(pb
);
122 int64_t base
= get_le64(pb
);
123 int stream_id
= 10*((chunk_id
&0xFF) - '0') + (((chunk_id
>>8)&0xFF) - '0');
127 int64_t last_pos
= -1;
128 int64_t filesize
= url_fsize(s
->pb
);
131 av_log(s
, AV_LOG_ERROR
, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64
"\n",
132 longs_pre_entry
,index_type
, entries_in_use
, chunk_id
, base
);
135 if(stream_id
> s
->nb_streams
|| stream_id
< 0)
137 st
= s
->streams
[stream_id
];
145 if(index_type
&& longs_pre_entry
!= 2)
150 if(filesize
> 0 && base
>= filesize
){
151 av_log(s
, AV_LOG_ERROR
, "ODML index invalid\n");
152 if(base
>>32 == (base
& 0xFFFFFFFF) && (base
& 0xFFFFFFFF) < filesize
&& filesize
<= 0xFFFFFFFF)
158 for(i
=0; i
<entries_in_use
; i
++){
160 int64_t pos
= get_le32(pb
) + base
- 8;
161 int len
= get_le32(pb
);
166 av_log(s
, AV_LOG_ERROR
, "pos:%"PRId64
", len:%X\n", pos
, len
);
171 if(last_pos
== pos
|| pos
== base
- 8)
172 avi
->non_interleaved
= 1;
174 av_add_index_entry(st
, pos
, ast
->cum_len
/ FFMAX(1, ast
->sample_size
), len
, 0, key
? AVINDEX_KEYFRAME
: 0);
184 offset
= get_le64(pb
);
185 get_le32(pb
); /* size */
186 duration
= get_le32(pb
);
193 url_fseek(pb
, offset
+8, SEEK_SET
);
194 read_braindead_odml_indx(s
, frame_num
);
195 frame_num
+= duration
;
197 url_fseek(pb
, pos
, SEEK_SET
);
204 static void clean_index(AVFormatContext
*s
){
208 for(i
=0; i
<s
->nb_streams
; i
++){
209 AVStream
*st
= s
->streams
[i
];
210 AVIStream
*ast
= st
->priv_data
;
211 int n
= st
->nb_index_entries
;
212 int max
= ast
->sample_size
;
213 int64_t pos
, size
, ts
;
215 if(n
!= 1 || ast
->sample_size
==0)
218 while(max
< 1024) max
+=max
;
220 pos
= st
->index_entries
[0].pos
;
221 size
= st
->index_entries
[0].size
;
222 ts
= st
->index_entries
[0].timestamp
;
224 for(j
=0; j
<size
; j
+=max
){
225 av_add_index_entry(st
, pos
+j
, ts
+ j
/ast
->sample_size
, FFMIN(max
, size
-j
), 0, AVINDEX_KEYFRAME
);
230 static int avi_read_tag(AVFormatContext
*s
, const char *key
, unsigned int size
)
232 ByteIOContext
*pb
= s
->pb
;
235 int64_t i
= url_ftell(pb
);
237 get_strz(pb
, value
, sizeof(value
));
238 url_fseek(pb
, i
+size
, SEEK_SET
);
240 return av_metadata_set(&s
->metadata
, key
, value
);
243 static int avi_read_header(AVFormatContext
*s
, AVFormatParameters
*ap
)
245 AVIContext
*avi
= s
->priv_data
;
246 ByteIOContext
*pb
= s
->pb
;
247 unsigned int tag
, tag1
, handler
;
248 int codec_type
, stream_index
, frame_period
, bit_rate
;
249 unsigned int size
, nb_frames
;
252 AVIStream
*ast
= NULL
;
253 int avih_width
=0, avih_height
=0;
254 int amv_file_format
=0;
256 avi
->stream_index
= -1;
258 if (get_riff(s
, pb
) < 0)
261 avi
->fsize
= url_fsize(pb
);
263 avi
->fsize
= avi
->riff_end
== 8 ? INT64_MAX
: avi
->riff_end
;
275 print_tag("tag", tag
, size
);
279 case MKTAG('L', 'I', 'S', 'T'):
280 /* Ignored, except at start of video packets. */
283 print_tag("list", tag1
, 0);
285 if (tag1
== MKTAG('m', 'o', 'v', 'i')) {
286 avi
->movi_list
= url_ftell(pb
) - 4;
287 if(size
) avi
->movi_end
= avi
->movi_list
+ size
+ (size
& 1);
288 else avi
->movi_end
= url_fsize(pb
);
290 printf("movi end=%"PRIx64
"\n", avi
->movi_end
);
295 case MKTAG('d', 'm', 'l', 'h'):
297 url_fskip(pb
, size
+ (size
& 1));
299 case MKTAG('a', 'm', 'v', 'h'):
301 case MKTAG('a', 'v', 'i', 'h'):
303 /* using frame_period is bad idea */
304 frame_period
= get_le32(pb
);
305 bit_rate
= get_le32(pb
) * 8;
307 avi
->non_interleaved
|= get_le32(pb
) & AVIF_MUSTUSEINDEX
;
309 url_fskip(pb
, 2 * 4);
312 avih_width
=get_le32(pb
);
313 avih_height
=get_le32(pb
);
315 url_fskip(pb
, size
- 10 * 4);
317 case MKTAG('s', 't', 'r', 'h'):
321 handler
= get_le32(pb
); /* codec tag */
323 if(tag1
== MKTAG('p', 'a', 'd', 's')){
324 url_fskip(pb
, size
- 8);
328 st
= av_new_stream(s
, stream_index
);
332 ast
= av_mallocz(sizeof(AVIStream
));
338 tag1
= stream_index
? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
341 print_tag("strh", tag1
, -1);
343 if(tag1
== MKTAG('i', 'a', 'v', 's') || tag1
== MKTAG('i', 'v', 'a', 's')){
347 * After some consideration -- I don't think we
348 * have to support anything but DV in type1 AVIs.
350 if (s
->nb_streams
!= 1)
353 if (handler
!= MKTAG('d', 'v', 's', 'd') &&
354 handler
!= MKTAG('d', 'v', 'h', 'd') &&
355 handler
!= MKTAG('d', 'v', 's', 'l'))
358 ast
= s
->streams
[0]->priv_data
;
359 av_freep(&s
->streams
[0]->codec
->extradata
);
360 av_freep(&s
->streams
[0]);
362 if (CONFIG_DV_DEMUXER
) {
363 avi
->dv_demux
= dv_init_demux(s
);
367 s
->streams
[0]->priv_data
= ast
;
368 url_fskip(pb
, 3 * 4);
369 ast
->scale
= get_le32(pb
);
370 ast
->rate
= get_le32(pb
);
371 url_fskip(pb
, 4); /* start time */
373 dv_dur
= get_le32(pb
);
374 if (ast
->scale
> 0 && ast
->rate
> 0 && dv_dur
> 0) {
375 dv_dur
*= AV_TIME_BASE
;
376 s
->duration
= av_rescale(dv_dur
, ast
->scale
, ast
->rate
);
379 * else, leave duration alone; timing estimation in utils.c
380 * will make a guess based on bitrate.
383 stream_index
= s
->nb_streams
- 1;
384 url_fskip(pb
, size
- 9*4);
388 assert(stream_index
< s
->nb_streams
);
389 st
->codec
->stream_codec_tag
= handler
;
391 get_le32(pb
); /* flags */
392 get_le16(pb
); /* priority */
393 get_le16(pb
); /* language */
394 get_le32(pb
); /* initial frame */
395 ast
->scale
= get_le32(pb
);
396 ast
->rate
= get_le32(pb
);
397 if(!(ast
->scale
&& ast
->rate
)){
398 av_log(s
, AV_LOG_WARNING
, "scale/rate is %u/%u which is invalid. (This file has been generated by broken software.)\n", ast
->scale
, ast
->rate
);
401 ast
->scale
= frame_period
;
407 av_set_pts_info(st
, 64, ast
->scale
, ast
->rate
);
409 ast
->cum_len
=get_le32(pb
); /* start */
410 nb_frames
= get_le32(pb
);
413 st
->duration
= nb_frames
;
414 get_le32(pb
); /* buffer size */
415 get_le32(pb
); /* quality */
416 ast
->sample_size
= get_le32(pb
); /* sample ssize */
417 ast
->cum_len
*= FFMAX(1, ast
->sample_size
);
418 // av_log(s, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
421 case MKTAG('v', 'i', 'd', 's'):
422 codec_type
= CODEC_TYPE_VIDEO
;
424 ast
->sample_size
= 0;
426 case MKTAG('a', 'u', 'd', 's'):
427 codec_type
= CODEC_TYPE_AUDIO
;
429 case MKTAG('t', 'x', 't', 's'):
431 codec_type
= CODEC_TYPE_DATA
; //CODEC_TYPE_SUB ? FIXME
433 case MKTAG('d', 'a', 't', 's'):
434 codec_type
= CODEC_TYPE_DATA
;
437 av_log(s
, AV_LOG_ERROR
, "unknown stream type %X\n", tag1
);
440 ast
->frame_offset
= ast
->cum_len
;
441 url_fskip(pb
, size
- 12 * 4);
443 case MKTAG('s', 't', 'r', 'f'):
445 if (stream_index
>= (unsigned)s
->nb_streams
|| avi
->dv_demux
) {
448 st
= s
->streams
[stream_index
];
450 case CODEC_TYPE_VIDEO
:
452 st
->codec
->width
=avih_width
;
453 st
->codec
->height
=avih_height
;
454 st
->codec
->codec_type
= CODEC_TYPE_VIDEO
;
455 st
->codec
->codec_id
= CODEC_ID_AMV
;
459 get_le32(pb
); /* size */
460 st
->codec
->width
= get_le32(pb
);
461 st
->codec
->height
= (int32_t)get_le32(pb
);
462 get_le16(pb
); /* panes */
463 st
->codec
->bits_per_coded_sample
= get_le16(pb
); /* depth */
465 get_le32(pb
); /* ImageSize */
466 get_le32(pb
); /* XPelsPerMeter */
467 get_le32(pb
); /* YPelsPerMeter */
468 get_le32(pb
); /* ClrUsed */
469 get_le32(pb
); /* ClrImportant */
471 if (tag1
== MKTAG('D', 'X', 'S', 'B')) {
472 st
->codec
->codec_type
= CODEC_TYPE_SUBTITLE
;
473 st
->codec
->codec_tag
= tag1
;
474 st
->codec
->codec_id
= CODEC_ID_XSUB
;
478 if(size
> 10*4 && size
<(1<<30)){
479 st
->codec
->extradata_size
= size
- 10*4;
480 st
->codec
->extradata
= av_malloc(st
->codec
->extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
481 get_buffer(pb
, st
->codec
->extradata
, st
->codec
->extradata_size
);
484 if(st
->codec
->extradata_size
& 1) //FIXME check if the encoder really did this correctly
487 /* Extract palette from extradata if bpp <= 8. */
488 /* This code assumes that extradata contains only palette. */
489 /* This is true for all paletted codecs implemented in FFmpeg. */
490 if (st
->codec
->extradata_size
&& (st
->codec
->bits_per_coded_sample
<= 8)) {
491 st
->codec
->palctrl
= av_mallocz(sizeof(AVPaletteControl
));
492 #ifdef WORDS_BIGENDIAN
493 for (i
= 0; i
< FFMIN(st
->codec
->extradata_size
, AVPALETTE_SIZE
)/4; i
++)
494 st
->codec
->palctrl
->palette
[i
] = bswap_32(((uint32_t*)st
->codec
->extradata
)[i
]);
496 memcpy(st
->codec
->palctrl
->palette
, st
->codec
->extradata
,
497 FFMIN(st
->codec
->extradata_size
, AVPALETTE_SIZE
));
499 st
->codec
->palctrl
->palette_changed
= 1;
503 print_tag("video", tag1
, 0);
505 st
->codec
->codec_type
= CODEC_TYPE_VIDEO
;
506 st
->codec
->codec_tag
= tag1
;
507 st
->codec
->codec_id
= codec_get_id(codec_bmp_tags
, tag1
);
508 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
; // This is needed to get the pict type which is necessary for generating correct pts.
510 if(st
->codec
->codec_tag
==0 && st
->codec
->height
> 0 && st
->codec
->extradata_size
< 1U<<30){
511 st
->codec
->extradata_size
+= 9;
512 st
->codec
->extradata
= av_realloc(st
->codec
->extradata
, st
->codec
->extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
513 if(st
->codec
->extradata
)
514 memcpy(st
->codec
->extradata
+ st
->codec
->extradata_size
- 9, "BottomUp", 9);
516 st
->codec
->height
= FFABS(st
->codec
->height
);
518 // url_fskip(pb, size - 5 * 4);
520 case CODEC_TYPE_AUDIO
:
521 get_wav_header(pb
, st
->codec
, size
);
522 if(ast
->sample_size
&& st
->codec
->block_align
&& ast
->sample_size
!= st
->codec
->block_align
){
523 av_log(s
, AV_LOG_WARNING
, "sample size (%d) != block align (%d)\n", ast
->sample_size
, st
->codec
->block_align
);
524 ast
->sample_size
= st
->codec
->block_align
;
526 if (size
%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
528 /* Force parsing as several audio frames can be in
529 * one packet and timestamps refer to packet start. */
530 st
->need_parsing
= AVSTREAM_PARSE_TIMESTAMPS
;
531 /* ADTS header is in extradata, AAC without header must be
532 * stored as exact frames. Parser not needed and it will
534 if (st
->codec
->codec_id
== CODEC_ID_AAC
&& st
->codec
->extradata_size
)
535 st
->need_parsing
= AVSTREAM_PARSE_NONE
;
536 /* AVI files with Xan DPCM audio (wrongly) declare PCM
537 * audio in the header but have Axan as stream_code_tag. */
538 if (st
->codec
->stream_codec_tag
== AV_RL32("Axan")){
539 st
->codec
->codec_id
= CODEC_ID_XAN_DPCM
;
540 st
->codec
->codec_tag
= 0;
543 st
->codec
->codec_id
= CODEC_ID_ADPCM_IMA_AMV
;
546 st
->codec
->codec_type
= CODEC_TYPE_DATA
;
547 st
->codec
->codec_id
= CODEC_ID_NONE
;
548 st
->codec
->codec_tag
= 0;
554 case MKTAG('i', 'n', 'd', 'x'):
556 if(!url_is_streamed(pb
) && !(s
->flags
& AVFMT_FLAG_IGNIDX
)){
557 read_braindead_odml_indx(s
, 0);
559 url_fseek(pb
, i
+size
, SEEK_SET
);
561 case MKTAG('v', 'p', 'r', 'p'):
562 if(stream_index
< (unsigned)s
->nb_streams
&& size
> 9*4){
563 AVRational active
, active_aspect
;
565 st
= s
->streams
[stream_index
];
572 active_aspect
.den
= get_le16(pb
);
573 active_aspect
.num
= get_le16(pb
);
574 active
.num
= get_le32(pb
);
575 active
.den
= get_le32(pb
);
576 get_le32(pb
); //nbFieldsPerFrame
578 if(active_aspect
.num
&& active_aspect
.den
&& active
.num
&& active
.den
){
579 st
->sample_aspect_ratio
= av_div_q(active_aspect
, active
);
580 //av_log(s, AV_LOG_ERROR, "vprp %d/%d %d/%d\n", active_aspect.num, active_aspect.den, active.num, active.den);
584 url_fseek(pb
, size
, SEEK_CUR
);
586 case MKTAG('I', 'N', 'A', 'M'):
587 avi_read_tag(s
, "Title", size
);
589 case MKTAG('I', 'A', 'R', 'T'):
590 avi_read_tag(s
, "Artist", size
);
592 case MKTAG('I', 'C', 'O', 'P'):
593 avi_read_tag(s
, "Copyright", size
);
595 case MKTAG('I', 'C', 'M', 'T'):
596 avi_read_tag(s
, "Comment", size
);
598 case MKTAG('I', 'G', 'N', 'R'):
599 avi_read_tag(s
, "Genre", size
);
601 case MKTAG('I', 'P', 'R', 'D'):
602 avi_read_tag(s
, "Album", size
);
604 case MKTAG('I', 'P', 'R', 'T'):
605 avi_read_tag(s
, "Track", size
);
609 av_log(s
, AV_LOG_ERROR
, "Something went wrong during header parsing, "
610 "I will ignore it and try to continue anyway.\n");
611 avi
->movi_list
= url_ftell(pb
) - 4;
612 avi
->movi_end
= url_fsize(pb
);
622 /* check stream number */
623 if (stream_index
!= s
->nb_streams
- 1) {
628 if(!avi
->index_loaded
&& !url_is_streamed(pb
))
630 avi
->index_loaded
= 1;
631 avi
->non_interleaved
|= guess_ni_flag(s
);
632 if(avi
->non_interleaved
) {
633 av_log(s
, AV_LOG_INFO
, "non-interleaved AVI\n");
640 static int get_stream_idx(int *d
){
641 if( d
[0] >= '0' && d
[0] <= '9'
642 && d
[1] >= '0' && d
[1] <= '9'){
643 return (d
[0] - '0') * 10 + (d
[1] - '0');
645 return 100; //invalid stream ID
649 static int avi_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
651 AVIContext
*avi
= s
->priv_data
;
652 ByteIOContext
*pb
= s
->pb
;
658 if (CONFIG_DV_DEMUXER
&& avi
->dv_demux
) {
659 int size
= dv_get_packet(avi
->dv_demux
, pkt
);
664 if(avi
->non_interleaved
){
665 int best_stream_index
= 0;
666 AVStream
*best_st
= NULL
;
668 int64_t best_ts
= INT64_MAX
;
671 for(i
=0; i
<s
->nb_streams
; i
++){
672 AVStream
*st
= s
->streams
[i
];
673 AVIStream
*ast
= st
->priv_data
;
674 int64_t ts
= ast
->frame_offset
;
677 ts
/= ast
->sample_size
;
678 ts
= av_rescale(ts
, AV_TIME_BASE
* (int64_t)st
->time_base
.num
, st
->time_base
.den
);
680 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
681 if(ts
< best_ts
&& st
->nb_index_entries
){
684 best_stream_index
= i
;
690 best_ast
= best_st
->priv_data
;
691 best_ts
= av_rescale(best_ts
, best_st
->time_base
.den
, AV_TIME_BASE
* (int64_t)best_st
->time_base
.num
); //FIXME a little ugly
692 if(best_ast
->remaining
)
693 i
= av_index_search_timestamp(best_st
, best_ts
, AVSEEK_FLAG_ANY
| AVSEEK_FLAG_BACKWARD
);
695 i
= av_index_search_timestamp(best_st
, best_ts
, AVSEEK_FLAG_ANY
);
697 best_ast
->frame_offset
= best_st
->index_entries
[i
].timestamp
698 * FFMAX(1, best_ast
->sample_size
);
701 // av_log(s, AV_LOG_DEBUG, "%d\n", i);
703 int64_t pos
= best_st
->index_entries
[i
].pos
;
704 pos
+= best_ast
->packet_size
- best_ast
->remaining
;
705 url_fseek(s
->pb
, pos
+ 8, SEEK_SET
);
706 // av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
708 assert(best_ast
->remaining
<= best_ast
->packet_size
);
710 avi
->stream_index
= best_stream_index
;
711 if(!best_ast
->remaining
)
712 best_ast
->packet_size
=
713 best_ast
->remaining
= best_st
->index_entries
[i
].size
;
718 if(avi
->stream_index
>= 0){
719 AVStream
*st
= s
->streams
[ avi
->stream_index
];
720 AVIStream
*ast
= st
->priv_data
;
723 if(ast
->sample_size
<= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
725 else if(ast
->sample_size
< 32)
726 size
= 64*ast
->sample_size
;
728 size
= ast
->sample_size
;
730 if(size
> ast
->remaining
)
731 size
= ast
->remaining
;
732 avi
->last_pkt_pos
= url_ftell(pb
);
733 err
= av_get_packet(pb
, pkt
, size
);
737 if(ast
->has_pal
&& pkt
->data
&& pkt
->size
<(unsigned)INT_MAX
/2){
738 void *ptr
= av_realloc(pkt
->data
, pkt
->size
+ 4*256 + FF_INPUT_BUFFER_PADDING_SIZE
);
743 memcpy(pkt
->data
+ pkt
->size
- 4*256, ast
->pal
, 4*256);
745 av_log(s
, AV_LOG_ERROR
, "Failed to append palette\n");
748 if (CONFIG_DV_DEMUXER
&& avi
->dv_demux
) {
749 dstr
= pkt
->destruct
;
750 size
= dv_produce_packet(avi
->dv_demux
, pkt
,
751 pkt
->data
, pkt
->size
);
752 pkt
->destruct
= dstr
;
753 pkt
->flags
|= PKT_FLAG_KEY
;
755 /* XXX: How to handle B-frames in AVI? */
756 pkt
->dts
= ast
->frame_offset
;
757 // pkt->dts += ast->start;
759 pkt
->dts
/= ast
->sample_size
;
760 //av_log(s, AV_LOG_DEBUG, "dts:%"PRId64" offset:%"PRId64" %d/%d smpl_siz:%d base:%d st:%d size:%d\n", pkt->dts, ast->frame_offset, ast->scale, ast->rate, ast->sample_size, AV_TIME_BASE, avi->stream_index, size);
761 pkt
->stream_index
= avi
->stream_index
;
763 if (st
->codec
->codec_type
== CODEC_TYPE_VIDEO
) {
766 assert(st
->index_entries
);
768 index
= av_index_search_timestamp(st
, pkt
->dts
, 0);
769 e
= &st
->index_entries
[index
];
771 if(index
>= 0 && e
->timestamp
== ast
->frame_offset
){
772 if (e
->flags
& AVINDEX_KEYFRAME
)
773 pkt
->flags
|= PKT_FLAG_KEY
;
776 pkt
->flags
|= PKT_FLAG_KEY
;
779 ast
->frame_offset
+= pkt
->size
;
783 ast
->remaining
-= size
;
785 avi
->stream_index
= -1;
792 memset(d
, -1, sizeof(int)*8);
793 for(i
=sync
=url_ftell(pb
); !url_feof(pb
); i
++) {
800 size
= d
[4] + (d
[5]<<8) + (d
[6]<<16) + (d
[7]<<24);
802 n
= get_stream_idx(d
+2);
803 //av_log(s, AV_LOG_DEBUG, "%X %X %X %X %X %X %X %X %"PRId64" %d %d\n", d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
804 if(i
+ (uint64_t)size
> avi
->fsize
|| d
[0]<0)
808 if( (d
[0] == 'i' && d
[1] == 'x' && n
< s
->nb_streams
)
810 ||(d
[0] == 'J' && d
[1] == 'U' && d
[2] == 'N' && d
[3] == 'K')
811 ||(d
[0] == 'i' && d
[1] == 'd' && d
[2] == 'x' && d
[3] == '1')){
813 //av_log(s, AV_LOG_DEBUG, "SKIP\n");
817 n
= get_stream_idx(d
);
819 if(!((i
-avi
->last_pkt_pos
)&1) && get_stream_idx(d
+1) < s
->nb_streams
)
823 if(n
< s
->nb_streams
){
829 if(s
->nb_streams
>=2){
830 AVStream
*st1
= s
->streams
[1];
831 AVIStream
*ast1
= st1
->priv_data
;
832 //workaround for broken small-file-bug402.avi
833 if( d
[2] == 'w' && d
[3] == 'b'
835 && st
->codec
->codec_type
== CODEC_TYPE_VIDEO
836 && st1
->codec
->codec_type
== CODEC_TYPE_AUDIO
837 && ast
->prefix
== 'd'*256+'c'
838 && (d
[2]*256+d
[3] == ast1
->prefix
|| !ast1
->prefix_count
)
843 av_log(s
, AV_LOG_WARNING
, "Invalid stream + prefix combination, assuming audio.\n");
848 if( (st
->discard
>= AVDISCARD_DEFAULT
&& size
==0)
849 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
850 || st
->discard
>= AVDISCARD_ALL
){
851 if(ast
->sample_size
) ast
->frame_offset
+= pkt
->size
;
852 else ast
->frame_offset
++;
857 if (d
[2] == 'p' && d
[3] == 'c' && size
<=4*256+4) {
858 int k
= get_byte(pb
);
859 int last
= (k
+ get_byte(pb
) - 1) & 0xFF;
861 get_le16(pb
); //flags
863 for (; k
<= last
; k
++)
864 ast
->pal
[k
] = get_be32(pb
)>>8;// b + (g << 8) + (r << 16);
867 } else if( ((ast
->prefix_count
<5 || sync
+9 > i
) && d
[2]<128 && d
[3]<128) ||
868 d
[2]*256+d
[3] == ast
->prefix
/*||
869 (d[2] == 'd' && d[3] == 'c') ||
870 (d[2] == 'w' && d[3] == 'b')*/) {
872 //av_log(s, AV_LOG_DEBUG, "OK\n");
873 if(d
[2]*256+d
[3] == ast
->prefix
)
876 ast
->prefix
= d
[2]*256+d
[3];
877 ast
->prefix_count
= 0;
880 avi
->stream_index
= n
;
881 ast
->packet_size
= size
+ 8;
882 ast
->remaining
= size
;
885 uint64_t pos
= url_ftell(pb
) - 8;
886 if(!st
->index_entries
|| !st
->nb_index_entries
|| st
->index_entries
[st
->nb_index_entries
- 1].pos
< pos
){
887 av_add_index_entry(st
, pos
, ast
->frame_offset
/ FFMAX(1, ast
->sample_size
), size
, 0, AVINDEX_KEYFRAME
);
898 /* XXX: We make the implicit supposition that the positions are sorted
900 static int avi_read_idx1(AVFormatContext
*s
, int size
)
902 AVIContext
*avi
= s
->priv_data
;
903 ByteIOContext
*pb
= s
->pb
;
904 int nb_index_entries
, i
;
907 unsigned int index
, tag
, flags
, pos
, len
;
908 unsigned last_pos
= -1;
910 nb_index_entries
= size
/ 16;
911 if (nb_index_entries
<= 0)
914 /* Read the entries and sort them in each stream component. */
915 for(i
= 0; i
< nb_index_entries
; i
++) {
917 flags
= get_le32(pb
);
920 #if defined(DEBUG_SEEK)
921 av_log(s
, AV_LOG_DEBUG
, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
922 i
, tag
, flags
, pos
, len
);
924 if(i
==0 && pos
> avi
->movi_list
)
925 avi
->movi_list
= 0; //FIXME better check
926 pos
+= avi
->movi_list
;
928 index
= ((tag
& 0xff) - '0') * 10;
929 index
+= ((tag
>> 8) & 0xff) - '0';
930 if (index
>= s
->nb_streams
)
932 st
= s
->streams
[index
];
935 #if defined(DEBUG_SEEK)
936 av_log(s
, AV_LOG_DEBUG
, "%d cum_len=%"PRId64
"\n", len
, ast
->cum_len
);
942 avi
->non_interleaved
= 1;
944 av_add_index_entry(st
, pos
, ast
->cum_len
/ FFMAX(1, ast
->sample_size
), len
, 0, (flags
&AVIIF_INDEX
) ? AVINDEX_KEYFRAME
: 0);
954 static int guess_ni_flag(AVFormatContext
*s
){
956 int64_t last_start
=0;
957 int64_t first_end
= INT64_MAX
;
959 for(i
=0; i
<s
->nb_streams
; i
++){
960 AVStream
*st
= s
->streams
[i
];
961 int n
= st
->nb_index_entries
;
966 if(st
->index_entries
[0].pos
> last_start
)
967 last_start
= st
->index_entries
[0].pos
;
968 if(st
->index_entries
[n
-1].pos
< first_end
)
969 first_end
= st
->index_entries
[n
-1].pos
;
971 return last_start
> first_end
;
974 static int avi_load_index(AVFormatContext
*s
)
976 AVIContext
*avi
= s
->priv_data
;
977 ByteIOContext
*pb
= s
->pb
;
979 int64_t pos
= url_ftell(pb
);
981 url_fseek(pb
, avi
->movi_end
, SEEK_SET
);
983 printf("movi_end=0x%"PRIx64
"\n", avi
->movi_end
);
991 printf("tag=%c%c%c%c size=0x%x\n",
999 case MKTAG('i', 'd', 'x', '1'):
1000 if (avi_read_idx1(s
, size
) < 0)
1008 url_fskip(pb
, size
);
1013 url_fseek(pb
, pos
, SEEK_SET
);
1017 static int avi_read_seek(AVFormatContext
*s
, int stream_index
, int64_t timestamp
, int flags
)
1019 AVIContext
*avi
= s
->priv_data
;
1024 if (!avi
->index_loaded
) {
1025 /* we only load the index on demand */
1027 avi
->index_loaded
= 1;
1029 assert(stream_index
>= 0);
1031 st
= s
->streams
[stream_index
];
1032 index
= av_index_search_timestamp(st
, timestamp
, flags
);
1036 /* find the position */
1037 pos
= st
->index_entries
[index
].pos
;
1038 timestamp
= st
->index_entries
[index
].timestamp
;
1040 // av_log(s, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
1042 if (CONFIG_DV_DEMUXER
&& avi
->dv_demux
) {
1043 /* One and only one real stream for DV in AVI, and it has video */
1044 /* offsets. Calling with other stream indexes should have failed */
1045 /* the av_index_search_timestamp call above. */
1046 assert(stream_index
== 0);
1048 /* Feed the DV video stream version of the timestamp to the */
1049 /* DV demux so it can synthesize correct timestamps. */
1050 dv_offset_reset(avi
->dv_demux
, timestamp
);
1052 url_fseek(s
->pb
, pos
, SEEK_SET
);
1053 avi
->stream_index
= -1;
1057 for(i
= 0; i
< s
->nb_streams
; i
++) {
1058 AVStream
*st2
= s
->streams
[i
];
1059 AVIStream
*ast2
= st2
->priv_data
;
1064 if (st2
->nb_index_entries
<= 0)
1067 // assert(st2->codec->block_align);
1068 assert((int64_t)st2
->time_base
.num
*ast2
->rate
== (int64_t)st2
->time_base
.den
*ast2
->scale
);
1069 index
= av_index_search_timestamp(
1071 av_rescale(timestamp
, st2
->time_base
.den
*(int64_t)st
->time_base
.num
, st
->time_base
.den
* (int64_t)st2
->time_base
.num
),
1072 flags
| AVSEEK_FLAG_BACKWARD
);
1076 if(!avi
->non_interleaved
){
1077 while(index
>0 && st2
->index_entries
[index
].pos
> pos
)
1079 while(index
+1 < st2
->nb_index_entries
&& st2
->index_entries
[index
].pos
< pos
)
1083 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
1084 /* extract the current frame number */
1085 ast2
->frame_offset
= st2
->index_entries
[index
].timestamp
;
1086 if(ast2
->sample_size
)
1087 ast2
->frame_offset
*=ast2
->sample_size
;
1091 url_fseek(s
->pb
, pos
, SEEK_SET
);
1092 avi
->stream_index
= -1;
1096 static int avi_read_close(AVFormatContext
*s
)
1099 AVIContext
*avi
= s
->priv_data
;
1101 for(i
=0;i
<s
->nb_streams
;i
++) {
1102 AVStream
*st
= s
->streams
[i
];
1103 av_free(st
->codec
->palctrl
);
1107 av_free(avi
->dv_demux
);
1112 static int avi_probe(AVProbeData
*p
)
1116 /* check file header */
1117 for(i
=0; avi_headers
[i
][0]; i
++)
1118 if(!memcmp(p
->buf
, avi_headers
[i
] , 4) &&
1119 !memcmp(p
->buf
+8, avi_headers
[i
]+4, 4))
1120 return AVPROBE_SCORE_MAX
;
1125 AVInputFormat avi_demuxer
= {
1127 NULL_IF_CONFIG_SMALL("AVI format"),