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
32 typedef struct AVIStream
{
33 int64_t frame_offset
; /* current frame (video) or byte (audio) counter
34 (used to compute the pts) */
40 int sample_size
; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
42 int64_t cum_len
; /* temporary storage (used during seek) */
44 int prefix
; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
60 DVDemuxContext
* dv_demux
;
63 static const char avi_headers
[][8] = {
64 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
65 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
66 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19},
67 { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' },
68 { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' },
72 static int avi_load_index(AVFormatContext
*s
);
73 static int guess_ni_flag(AVFormatContext
*s
);
76 static void print_tag(const char *str
, unsigned int tag
, int size
)
78 printf("%s: tag=%c%c%c%c size=0x%x\n",
87 static int get_riff(AVIContext
*avi
, ByteIOContext
*pb
)
92 /* check RIFF header */
93 get_buffer(pb
, header
, 4);
94 avi
->riff_end
= get_le32(pb
); /* RIFF chunk size */
95 avi
->riff_end
+= url_ftell(pb
); /* RIFF chunk end */
96 get_buffer(pb
, header
+4, 4);
98 for(i
=0; avi_headers
[i
][0]; i
++)
99 if(!memcmp(header
, avi_headers
[i
], 8))
101 if(!avi_headers
[i
][0])
104 if(header
[7] == 0x19)
105 av_log(NULL
, AV_LOG_INFO
, "This file has been generated by a totally broken muxer.\n");
110 static int read_braindead_odml_indx(AVFormatContext
*s
, int frame_num
){
111 AVIContext
*avi
= s
->priv_data
;
112 ByteIOContext
*pb
= s
->pb
;
113 int longs_pre_entry
= get_le16(pb
);
114 int index_sub_type
= get_byte(pb
);
115 int index_type
= get_byte(pb
);
116 int entries_in_use
= get_le32(pb
);
117 int chunk_id
= get_le32(pb
);
118 int64_t base
= get_le64(pb
);
119 int stream_id
= 10*((chunk_id
&0xFF) - '0') + (((chunk_id
>>8)&0xFF) - '0');
123 int64_t last_pos
= -1;
124 int64_t filesize
= url_fsize(s
->pb
);
127 av_log(s
, AV_LOG_ERROR
, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64
"\n",
128 longs_pre_entry
,index_type
, entries_in_use
, chunk_id
, base
);
131 if(stream_id
> s
->nb_streams
|| stream_id
< 0)
133 st
= s
->streams
[stream_id
];
141 if(index_type
&& longs_pre_entry
!= 2)
146 if(filesize
> 0 && base
>= filesize
){
147 av_log(s
, AV_LOG_ERROR
, "ODML index invalid\n");
148 if(base
>>32 == (base
& 0xFFFFFFFF) && (base
& 0xFFFFFFFF) < filesize
&& filesize
<= 0xFFFFFFFF)
154 for(i
=0; i
<entries_in_use
; i
++){
156 int64_t pos
= get_le32(pb
) + base
- 8;
157 int len
= get_le32(pb
);
162 av_log(s
, AV_LOG_ERROR
, "pos:%"PRId64
", len:%X\n", pos
, len
);
164 if(last_pos
== pos
|| pos
== base
- 8)
165 avi
->non_interleaved
= 1;
167 av_add_index_entry(st
, pos
, ast
->cum_len
/ FFMAX(1, ast
->sample_size
), len
, 0, key
? AVINDEX_KEYFRAME
: 0);
177 offset
= get_le64(pb
);
178 get_le32(pb
); /* size */
179 duration
= get_le32(pb
);
182 url_fseek(pb
, offset
+8, SEEK_SET
);
183 read_braindead_odml_indx(s
, frame_num
);
184 frame_num
+= duration
;
186 url_fseek(pb
, pos
, SEEK_SET
);
193 static void clean_index(AVFormatContext
*s
){
197 for(i
=0; i
<s
->nb_streams
; i
++){
198 AVStream
*st
= s
->streams
[i
];
199 AVIStream
*ast
= st
->priv_data
;
200 int n
= st
->nb_index_entries
;
201 int max
= ast
->sample_size
;
202 int64_t pos
, size
, ts
;
204 if(n
!= 1 || ast
->sample_size
==0)
207 while(max
< 1024) max
+=max
;
209 pos
= st
->index_entries
[0].pos
;
210 size
= st
->index_entries
[0].size
;
211 ts
= st
->index_entries
[0].timestamp
;
213 for(j
=0; j
<size
; j
+=max
){
214 av_add_index_entry(st
, pos
+j
, ts
+ j
/ast
->sample_size
, FFMIN(max
, size
-j
), 0, AVINDEX_KEYFRAME
);
219 static int avi_read_tag(ByteIOContext
*pb
, char *buf
, int maxlen
, unsigned int size
)
221 int64_t i
= url_ftell(pb
);
223 get_strz(pb
, buf
, maxlen
);
224 url_fseek(pb
, i
+size
, SEEK_SET
);
228 static int avi_read_header(AVFormatContext
*s
, AVFormatParameters
*ap
)
230 AVIContext
*avi
= s
->priv_data
;
231 ByteIOContext
*pb
= s
->pb
;
232 uint32_t tag
, tag1
, handler
;
233 int codec_type
, stream_index
, frame_period
, bit_rate
;
234 unsigned int size
, nb_frames
;
237 AVIStream
*ast
= NULL
;
239 int avih_width
=0, avih_height
=0;
240 int amv_file_format
=0;
242 avi
->stream_index
= -1;
244 if (get_riff(avi
, pb
) < 0)
247 avi
->fsize
= url_fsize(pb
);
249 avi
->fsize
= avi
->riff_end
;
261 print_tag("tag", tag
, size
);
265 case MKTAG('L', 'I', 'S', 'T'):
266 /* Ignored, except at start of video packets. */
269 print_tag("list", tag1
, 0);
271 if (tag1
== MKTAG('m', 'o', 'v', 'i')) {
272 avi
->movi_list
= url_ftell(pb
) - 4;
273 if(size
) avi
->movi_end
= avi
->movi_list
+ size
+ (size
& 1);
274 else avi
->movi_end
= url_fsize(pb
);
276 printf("movi end=%"PRIx64
"\n", avi
->movi_end
);
281 case MKTAG('d', 'm', 'l', 'h'):
283 url_fskip(pb
, size
+ (size
& 1));
285 case MKTAG('a', 'm', 'v', 'h'):
287 case MKTAG('a', 'v', 'i', 'h'):
289 /* using frame_period is bad idea */
290 frame_period
= get_le32(pb
);
291 bit_rate
= get_le32(pb
) * 8;
293 avi
->non_interleaved
|= get_le32(pb
) & AVIF_MUSTUSEINDEX
;
295 url_fskip(pb
, 2 * 4);
298 avih_width
=get_le32(pb
);
299 avih_height
=get_le32(pb
);
301 url_fskip(pb
, size
- 10 * 4);
303 case MKTAG('s', 't', 'r', 'h'):
307 handler
= get_le32(pb
); /* codec tag */
309 if(tag1
== MKTAG('p', 'a', 'd', 's')){
310 url_fskip(pb
, size
- 8);
314 st
= av_new_stream(s
, stream_index
);
318 ast
= av_mallocz(sizeof(AVIStream
));
324 tag1
= stream_index
? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
327 print_tag("strh", tag1
, -1);
329 if(tag1
== MKTAG('i', 'a', 'v', 's') || tag1
== MKTAG('i', 'v', 'a', 's')){
333 * After some consideration -- I don't think we
334 * have to support anything but DV in type1 AVIs.
336 if (s
->nb_streams
!= 1)
339 if (handler
!= MKTAG('d', 'v', 's', 'd') &&
340 handler
!= MKTAG('d', 'v', 'h', 'd') &&
341 handler
!= MKTAG('d', 'v', 's', 'l'))
344 ast
= s
->streams
[0]->priv_data
;
345 av_freep(&s
->streams
[0]->codec
->extradata
);
346 av_freep(&s
->streams
[0]);
348 if (ENABLE_DV_DEMUXER
) {
349 avi
->dv_demux
= dv_init_demux(s
);
353 s
->streams
[0]->priv_data
= ast
;
354 url_fskip(pb
, 3 * 4);
355 ast
->scale
= get_le32(pb
);
356 ast
->rate
= get_le32(pb
);
357 url_fskip(pb
, 4); /* start time */
359 dv_dur
= get_le32(pb
);
360 if (ast
->scale
> 0 && ast
->rate
> 0 && dv_dur
> 0) {
361 dv_dur
*= AV_TIME_BASE
;
362 s
->duration
= av_rescale(dv_dur
, ast
->scale
, ast
->rate
);
365 * else, leave duration alone; timing estimation in utils.c
366 * will make a guess based on bitrate.
369 stream_index
= s
->nb_streams
- 1;
370 url_fskip(pb
, size
- 9*4);
374 assert(stream_index
< s
->nb_streams
);
375 st
->codec
->stream_codec_tag
= handler
;
377 get_le32(pb
); /* flags */
378 get_le16(pb
); /* priority */
379 get_le16(pb
); /* language */
380 get_le32(pb
); /* initial frame */
381 ast
->scale
= get_le32(pb
);
382 ast
->rate
= get_le32(pb
);
383 if(!(ast
->scale
&& ast
->rate
)){
384 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
);
387 ast
->scale
= frame_period
;
393 av_set_pts_info(st
, 64, ast
->scale
, ast
->rate
);
395 ast
->cum_len
=get_le32(pb
); /* start */
396 nb_frames
= get_le32(pb
);
399 st
->duration
= nb_frames
;
400 get_le32(pb
); /* buffer size */
401 get_le32(pb
); /* quality */
402 ast
->sample_size
= get_le32(pb
); /* sample ssize */
403 ast
->cum_len
*= FFMAX(1, ast
->sample_size
);
404 // av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
407 case MKTAG('v', 'i', 'd', 's'):
408 codec_type
= CODEC_TYPE_VIDEO
;
410 ast
->sample_size
= 0;
412 case MKTAG('a', 'u', 'd', 's'):
413 codec_type
= CODEC_TYPE_AUDIO
;
415 case MKTAG('t', 'x', 't', 's'):
417 codec_type
= CODEC_TYPE_DATA
; //CODEC_TYPE_SUB ? FIXME
419 case MKTAG('d', 'a', 't', 's'):
420 codec_type
= CODEC_TYPE_DATA
;
423 av_log(s
, AV_LOG_ERROR
, "unknown stream type %X\n", tag1
);
426 ast
->frame_offset
= ast
->cum_len
;
427 url_fskip(pb
, size
- 12 * 4);
429 case MKTAG('s', 't', 'r', 'f'):
431 if (stream_index
>= (unsigned)s
->nb_streams
|| avi
->dv_demux
) {
434 st
= s
->streams
[stream_index
];
436 case CODEC_TYPE_VIDEO
:
438 st
->codec
->width
=avih_width
;
439 st
->codec
->height
=avih_height
;
440 st
->codec
->codec_type
= CODEC_TYPE_VIDEO
;
441 st
->codec
->codec_id
= CODEC_ID_AMV
;
445 get_le32(pb
); /* size */
446 st
->codec
->width
= get_le32(pb
);
447 st
->codec
->height
= get_le32(pb
);
448 get_le16(pb
); /* panes */
449 st
->codec
->bits_per_coded_sample
= get_le16(pb
); /* depth */
451 get_le32(pb
); /* ImageSize */
452 get_le32(pb
); /* XPelsPerMeter */
453 get_le32(pb
); /* YPelsPerMeter */
454 get_le32(pb
); /* ClrUsed */
455 get_le32(pb
); /* ClrImportant */
457 if (tag1
== MKTAG('D', 'X', 'S', 'B')) {
458 st
->codec
->codec_type
= CODEC_TYPE_SUBTITLE
;
459 st
->codec
->codec_tag
= tag1
;
460 st
->codec
->codec_id
= CODEC_ID_XSUB
;
464 if(size
> 10*4 && size
<(1<<30)){
465 st
->codec
->extradata_size
= size
- 10*4;
466 st
->codec
->extradata
= av_malloc(st
->codec
->extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
467 get_buffer(pb
, st
->codec
->extradata
, st
->codec
->extradata_size
);
470 if(st
->codec
->extradata_size
& 1) //FIXME check if the encoder really did this correctly
473 /* Extract palette from extradata if bpp <= 8. */
474 /* This code assumes that extradata contains only palette. */
475 /* This is true for all paletted codecs implemented in FFmpeg. */
476 if (st
->codec
->extradata_size
&& (st
->codec
->bits_per_coded_sample
<= 8)) {
477 st
->codec
->palctrl
= av_mallocz(sizeof(AVPaletteControl
));
478 #ifdef WORDS_BIGENDIAN
479 for (i
= 0; i
< FFMIN(st
->codec
->extradata_size
, AVPALETTE_SIZE
)/4; i
++)
480 st
->codec
->palctrl
->palette
[i
] = bswap_32(((uint32_t*)st
->codec
->extradata
)[i
]);
482 memcpy(st
->codec
->palctrl
->palette
, st
->codec
->extradata
,
483 FFMIN(st
->codec
->extradata_size
, AVPALETTE_SIZE
));
485 st
->codec
->palctrl
->palette_changed
= 1;
489 print_tag("video", tag1
, 0);
491 st
->codec
->codec_type
= CODEC_TYPE_VIDEO
;
492 st
->codec
->codec_tag
= tag1
;
493 st
->codec
->codec_id
= codec_get_id(codec_bmp_tags
, tag1
);
494 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
; // This is needed to get the pict type which is necessary for generating correct pts.
495 // url_fskip(pb, size - 5 * 4);
497 case CODEC_TYPE_AUDIO
:
498 get_wav_header(pb
, st
->codec
, size
);
499 if(ast
->sample_size
&& st
->codec
->block_align
&& ast
->sample_size
!= st
->codec
->block_align
){
500 av_log(s
, AV_LOG_WARNING
, "sample size (%d) != block align (%d)\n", ast
->sample_size
, st
->codec
->block_align
);
501 ast
->sample_size
= st
->codec
->block_align
;
503 if (size
%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
505 /* Force parsing as several audio frames can be in
506 * one packet and timestamps refer to packet start. */
507 st
->need_parsing
= AVSTREAM_PARSE_TIMESTAMPS
;
508 /* ADTS header is in extradata, AAC without header must be
509 * stored as exact frames. Parser not needed and it will
511 if (st
->codec
->codec_id
== CODEC_ID_AAC
&& st
->codec
->extradata_size
)
512 st
->need_parsing
= AVSTREAM_PARSE_NONE
;
513 /* AVI files with Xan DPCM audio (wrongly) declare PCM
514 * audio in the header but have Axan as stream_code_tag. */
515 if (st
->codec
->stream_codec_tag
== ff_get_fourcc("Axan")){
516 st
->codec
->codec_id
= CODEC_ID_XAN_DPCM
;
517 st
->codec
->codec_tag
= 0;
520 st
->codec
->codec_id
= CODEC_ID_ADPCM_IMA_AMV
;
523 st
->codec
->codec_type
= CODEC_TYPE_DATA
;
524 st
->codec
->codec_id
= CODEC_ID_NONE
;
525 st
->codec
->codec_tag
= 0;
531 case MKTAG('i', 'n', 'd', 'x'):
533 if(!url_is_streamed(pb
) && !(s
->flags
& AVFMT_FLAG_IGNIDX
)){
534 read_braindead_odml_indx(s
, 0);
536 url_fseek(pb
, i
+size
, SEEK_SET
);
538 case MKTAG('v', 'p', 'r', 'p'):
539 if(stream_index
< (unsigned)s
->nb_streams
&& size
> 9*4){
540 AVRational active
, active_aspect
;
542 st
= s
->streams
[stream_index
];
549 active_aspect
.den
= get_le16(pb
);
550 active_aspect
.num
= get_le16(pb
);
551 active
.num
= get_le32(pb
);
552 active
.den
= get_le32(pb
);
553 get_le32(pb
); //nbFieldsPerFrame
555 if(active_aspect
.num
&& active_aspect
.den
&& active
.num
&& active
.den
){
556 st
->sample_aspect_ratio
= av_div_q(active_aspect
, active
);
557 //av_log(s, AV_LOG_ERROR, "vprp %d/%d %d/%d\n", active_aspect.num, active_aspect.den, active.num, active.den);
561 url_fseek(pb
, size
, SEEK_CUR
);
563 case MKTAG('I', 'N', 'A', 'M'):
564 avi_read_tag(pb
, s
->title
, sizeof(s
->title
), size
);
566 case MKTAG('I', 'A', 'R', 'T'):
567 avi_read_tag(pb
, s
->author
, sizeof(s
->author
), size
);
569 case MKTAG('I', 'C', 'O', 'P'):
570 avi_read_tag(pb
, s
->copyright
, sizeof(s
->copyright
), size
);
572 case MKTAG('I', 'C', 'M', 'T'):
573 avi_read_tag(pb
, s
->comment
, sizeof(s
->comment
), size
);
575 case MKTAG('I', 'G', 'N', 'R'):
576 avi_read_tag(pb
, s
->genre
, sizeof(s
->genre
), size
);
578 case MKTAG('I', 'P', 'R', 'D'):
579 avi_read_tag(pb
, s
->album
, sizeof(s
->album
), size
);
581 case MKTAG('I', 'P', 'R', 'T'):
582 avi_read_tag(pb
, str_track
, sizeof(str_track
), size
);
583 sscanf(str_track
, "%d", &s
->track
);
587 av_log(s
, AV_LOG_ERROR
, "Something went wrong during header parsing, "
588 "I will ignore it and try to continue anyway.\n");
589 avi
->movi_list
= url_ftell(pb
) - 4;
590 avi
->movi_end
= url_fsize(pb
);
600 /* check stream number */
601 if (stream_index
!= s
->nb_streams
- 1) {
606 if(!avi
->index_loaded
&& !url_is_streamed(pb
))
608 avi
->index_loaded
= 1;
609 avi
->non_interleaved
|= guess_ni_flag(s
);
610 if(avi
->non_interleaved
) {
611 av_log(s
, AV_LOG_INFO
, "non-interleaved AVI\n");
618 static int get_stream_idx(int *d
){
619 if( d
[0] >= '0' && d
[0] <= '9'
620 && d
[1] >= '0' && d
[1] <= '9'){
621 return (d
[0] - '0') * 10 + (d
[1] - '0');
623 return 100; //invalid stream ID
627 static int avi_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
629 AVIContext
*avi
= s
->priv_data
;
630 ByteIOContext
*pb
= s
->pb
;
635 if (ENABLE_DV_DEMUXER
&& avi
->dv_demux
) {
636 size
= dv_get_packet(avi
->dv_demux
, pkt
);
641 if(avi
->non_interleaved
){
642 int best_stream_index
= 0;
643 AVStream
*best_st
= NULL
;
645 int64_t best_ts
= INT64_MAX
;
648 for(i
=0; i
<s
->nb_streams
; i
++){
649 AVStream
*st
= s
->streams
[i
];
650 AVIStream
*ast
= st
->priv_data
;
651 int64_t ts
= ast
->frame_offset
;
654 ts
/= ast
->sample_size
;
655 ts
= av_rescale(ts
, AV_TIME_BASE
* (int64_t)st
->time_base
.num
, st
->time_base
.den
);
657 // av_log(NULL, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
658 if(ts
< best_ts
&& st
->nb_index_entries
){
661 best_stream_index
= i
;
667 best_ast
= best_st
->priv_data
;
668 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
669 if(best_ast
->remaining
)
670 i
= av_index_search_timestamp(best_st
, best_ts
, AVSEEK_FLAG_ANY
| AVSEEK_FLAG_BACKWARD
);
672 i
= av_index_search_timestamp(best_st
, best_ts
, AVSEEK_FLAG_ANY
);
674 // av_log(NULL, AV_LOG_DEBUG, "%d\n", i);
676 int64_t pos
= best_st
->index_entries
[i
].pos
;
677 pos
+= best_ast
->packet_size
- best_ast
->remaining
;
678 url_fseek(s
->pb
, pos
+ 8, SEEK_SET
);
679 // av_log(NULL, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
681 assert(best_ast
->remaining
<= best_ast
->packet_size
);
683 avi
->stream_index
= best_stream_index
;
684 if(!best_ast
->remaining
)
685 best_ast
->packet_size
=
686 best_ast
->remaining
= best_st
->index_entries
[i
].size
;
691 if(avi
->stream_index
>= 0){
692 AVStream
*st
= s
->streams
[ avi
->stream_index
];
693 AVIStream
*ast
= st
->priv_data
;
696 if(ast
->sample_size
<= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
698 else if(ast
->sample_size
< 32)
699 size
= 64*ast
->sample_size
;
701 size
= ast
->sample_size
;
703 if(size
> ast
->remaining
)
704 size
= ast
->remaining
;
705 avi
->last_pkt_pos
= url_ftell(pb
);
706 av_get_packet(pb
, pkt
, size
);
708 if(ast
->has_pal
&& pkt
->data
&& pkt
->size
<(unsigned)INT_MAX
/2){
711 pkt
->data
= av_realloc(pkt
->data
, pkt
->size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
713 memcpy(pkt
->data
+ pkt
->size
- 4*256, ast
->pal
, 4*256);
716 if (ENABLE_DV_DEMUXER
&& avi
->dv_demux
) {
717 dstr
= pkt
->destruct
;
718 size
= dv_produce_packet(avi
->dv_demux
, pkt
,
719 pkt
->data
, pkt
->size
);
720 pkt
->destruct
= dstr
;
721 pkt
->flags
|= PKT_FLAG_KEY
;
723 /* XXX: How to handle B-frames in AVI? */
724 pkt
->dts
= ast
->frame_offset
;
725 // pkt->dts += ast->start;
727 pkt
->dts
/= ast
->sample_size
;
728 //av_log(NULL, 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);
729 pkt
->stream_index
= avi
->stream_index
;
731 if (st
->codec
->codec_type
== CODEC_TYPE_VIDEO
) {
734 assert(st
->index_entries
);
736 index
= av_index_search_timestamp(st
, pkt
->dts
, 0);
737 e
= &st
->index_entries
[index
];
739 if(index
>= 0 && e
->timestamp
== ast
->frame_offset
){
740 if (e
->flags
& AVINDEX_KEYFRAME
)
741 pkt
->flags
|= PKT_FLAG_KEY
;
744 pkt
->flags
|= PKT_FLAG_KEY
;
747 ast
->frame_offset
+= pkt
->size
;
751 ast
->remaining
-= size
;
753 avi
->stream_index
= -1;
760 memset(d
, -1, sizeof(int)*8);
761 for(i
=sync
=url_ftell(pb
); !url_feof(pb
); i
++) {
768 size
= d
[4] + (d
[5]<<8) + (d
[6]<<16) + (d
[7]<<24);
770 n
= get_stream_idx(d
+2);
771 //av_log(NULL, 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);
772 if(i
+ size
> avi
->fsize
|| d
[0]<0)
776 if( (d
[0] == 'i' && d
[1] == 'x' && n
< s
->nb_streams
)
778 ||(d
[0] == 'J' && d
[1] == 'U' && d
[2] == 'N' && d
[3] == 'K')
779 ||(d
[0] == 'i' && d
[1] == 'd' && d
[2] == 'x' && d
[3] == '1')){
781 //av_log(NULL, AV_LOG_DEBUG, "SKIP\n");
785 n
= get_stream_idx(d
);
787 if(!((i
-avi
->last_pkt_pos
)&1) && get_stream_idx(d
+1) < s
->nb_streams
)
791 if(n
< s
->nb_streams
){
797 if(s
->nb_streams
>=2){
798 AVStream
*st1
= s
->streams
[1];
799 AVIStream
*ast1
= st1
->priv_data
;
800 //workaround for broken small-file-bug402.avi
801 if( d
[2] == 'w' && d
[3] == 'b'
803 && st
->codec
->codec_type
== CODEC_TYPE_VIDEO
804 && st1
->codec
->codec_type
== CODEC_TYPE_AUDIO
805 && ast
->prefix
== 'd'*256+'c'
806 && (d
[2]*256+d
[3] == ast1
->prefix
|| !ast1
->prefix_count
)
811 av_log(s
, AV_LOG_WARNING
, "Invalid stream + prefix combination, assuming audio.\n");
816 if( (st
->discard
>= AVDISCARD_DEFAULT
&& size
==0)
817 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
818 || st
->discard
>= AVDISCARD_ALL
){
819 if(ast
->sample_size
) ast
->frame_offset
+= pkt
->size
;
820 else ast
->frame_offset
++;
825 if (d
[2] == 'p' && d
[3] == 'c' && size
<=4*256+4) {
826 int k
= get_byte(pb
);
827 int last
= (k
+ get_byte(pb
) - 1) & 0xFF;
829 get_le16(pb
); //flags
831 for (; k
<= last
; k
++)
832 ast
->pal
[k
] = get_be32(pb
)>>8;// b + (g << 8) + (r << 16);
835 } else if( ((ast
->prefix_count
<5 || sync
+9 > i
) && d
[2]<128 && d
[3]<128) ||
836 d
[2]*256+d
[3] == ast
->prefix
/*||
837 (d[2] == 'd' && d[3] == 'c') ||
838 (d[2] == 'w' && d[3] == 'b')*/) {
840 //av_log(NULL, AV_LOG_DEBUG, "OK\n");
841 if(d
[2]*256+d
[3] == ast
->prefix
)
844 ast
->prefix
= d
[2]*256+d
[3];
845 ast
->prefix_count
= 0;
848 avi
->stream_index
= n
;
849 ast
->packet_size
= size
+ 8;
850 ast
->remaining
= size
;
853 uint64_t pos
= url_ftell(pb
) - 8;
854 if(!st
->index_entries
|| !st
->nb_index_entries
|| st
->index_entries
[st
->nb_index_entries
- 1].pos
< pos
){
855 av_add_index_entry(st
, pos
, ast
->frame_offset
/ FFMAX(1, ast
->sample_size
), size
, 0, AVINDEX_KEYFRAME
);
866 /* XXX: We make the implicit supposition that the positions are sorted
868 static int avi_read_idx1(AVFormatContext
*s
, int size
)
870 AVIContext
*avi
= s
->priv_data
;
871 ByteIOContext
*pb
= s
->pb
;
872 int nb_index_entries
, i
;
875 unsigned int index
, tag
, flags
, pos
, len
;
876 unsigned last_pos
= -1;
878 nb_index_entries
= size
/ 16;
879 if (nb_index_entries
<= 0)
882 /* Read the entries and sort them in each stream component. */
883 for(i
= 0; i
< nb_index_entries
; i
++) {
885 flags
= get_le32(pb
);
888 #if defined(DEBUG_SEEK)
889 av_log(NULL
, AV_LOG_DEBUG
, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
890 i
, tag
, flags
, pos
, len
);
892 if(i
==0 && pos
> avi
->movi_list
)
893 avi
->movi_list
= 0; //FIXME better check
894 pos
+= avi
->movi_list
;
896 index
= ((tag
& 0xff) - '0') * 10;
897 index
+= ((tag
>> 8) & 0xff) - '0';
898 if (index
>= s
->nb_streams
)
900 st
= s
->streams
[index
];
903 #if defined(DEBUG_SEEK)
904 av_log(NULL
, AV_LOG_DEBUG
, "%d cum_len=%"PRId64
"\n", len
, ast
->cum_len
);
907 avi
->non_interleaved
= 1;
909 av_add_index_entry(st
, pos
, ast
->cum_len
/ FFMAX(1, ast
->sample_size
), len
, 0, (flags
&AVIIF_INDEX
) ? AVINDEX_KEYFRAME
: 0);
919 static int guess_ni_flag(AVFormatContext
*s
){
921 int64_t last_start
=0;
922 int64_t first_end
= INT64_MAX
;
924 for(i
=0; i
<s
->nb_streams
; i
++){
925 AVStream
*st
= s
->streams
[i
];
926 int n
= st
->nb_index_entries
;
931 if(st
->index_entries
[0].pos
> last_start
)
932 last_start
= st
->index_entries
[0].pos
;
933 if(st
->index_entries
[n
-1].pos
< first_end
)
934 first_end
= st
->index_entries
[n
-1].pos
;
936 return last_start
> first_end
;
939 static int avi_load_index(AVFormatContext
*s
)
941 AVIContext
*avi
= s
->priv_data
;
942 ByteIOContext
*pb
= s
->pb
;
944 int64_t pos
= url_ftell(pb
);
946 url_fseek(pb
, avi
->movi_end
, SEEK_SET
);
948 printf("movi_end=0x%"PRIx64
"\n", avi
->movi_end
);
956 printf("tag=%c%c%c%c size=0x%x\n",
964 case MKTAG('i', 'd', 'x', '1'):
965 if (avi_read_idx1(s
, size
) < 0)
978 url_fseek(pb
, pos
, SEEK_SET
);
982 static int avi_read_seek(AVFormatContext
*s
, int stream_index
, int64_t timestamp
, int flags
)
984 AVIContext
*avi
= s
->priv_data
;
989 if (!avi
->index_loaded
) {
990 /* we only load the index on demand */
992 avi
->index_loaded
= 1;
994 assert(stream_index
>= 0);
996 st
= s
->streams
[stream_index
];
997 index
= av_index_search_timestamp(st
, timestamp
, flags
);
1001 /* find the position */
1002 pos
= st
->index_entries
[index
].pos
;
1003 timestamp
= st
->index_entries
[index
].timestamp
;
1005 // av_log(NULL, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
1007 if (ENABLE_DV_DEMUXER
&& avi
->dv_demux
) {
1008 /* One and only one real stream for DV in AVI, and it has video */
1009 /* offsets. Calling with other stream indexes should have failed */
1010 /* the av_index_search_timestamp call above. */
1011 assert(stream_index
== 0);
1013 /* Feed the DV video stream version of the timestamp to the */
1014 /* DV demux so it can synthesize correct timestamps. */
1015 dv_offset_reset(avi
->dv_demux
, timestamp
);
1017 url_fseek(s
->pb
, pos
, SEEK_SET
);
1018 avi
->stream_index
= -1;
1022 for(i
= 0; i
< s
->nb_streams
; i
++) {
1023 AVStream
*st2
= s
->streams
[i
];
1024 AVIStream
*ast2
= st2
->priv_data
;
1029 if (st2
->nb_index_entries
<= 0)
1032 // assert(st2->codec->block_align);
1033 assert((int64_t)st2
->time_base
.num
*ast2
->rate
== (int64_t)st2
->time_base
.den
*ast2
->scale
);
1034 index
= av_index_search_timestamp(
1036 av_rescale(timestamp
, st2
->time_base
.den
*(int64_t)st
->time_base
.num
, st
->time_base
.den
* (int64_t)st2
->time_base
.num
),
1037 flags
| AVSEEK_FLAG_BACKWARD
);
1041 if(!avi
->non_interleaved
){
1042 while(index
>0 && st2
->index_entries
[index
].pos
> pos
)
1044 while(index
+1 < st2
->nb_index_entries
&& st2
->index_entries
[index
].pos
< pos
)
1048 // av_log(NULL, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
1049 /* extract the current frame number */
1050 ast2
->frame_offset
= st2
->index_entries
[index
].timestamp
;
1051 if(ast2
->sample_size
)
1052 ast2
->frame_offset
*=ast2
->sample_size
;
1056 url_fseek(s
->pb
, pos
, SEEK_SET
);
1057 avi
->stream_index
= -1;
1061 static int avi_read_close(AVFormatContext
*s
)
1064 AVIContext
*avi
= s
->priv_data
;
1066 for(i
=0;i
<s
->nb_streams
;i
++) {
1067 AVStream
*st
= s
->streams
[i
];
1068 av_free(st
->codec
->palctrl
);
1072 av_free(avi
->dv_demux
);
1077 static int avi_probe(AVProbeData
*p
)
1081 /* check file header */
1082 for(i
=0; avi_headers
[i
][0]; i
++)
1083 if(!memcmp(p
->buf
, avi_headers
[i
] , 4) &&
1084 !memcmp(p
->buf
+8, avi_headers
[i
]+4, 4))
1085 return AVPROBE_SCORE_MAX
;
1090 AVInputFormat avi_demuxer
= {
1092 NULL_IF_CONFIG_SMALL("AVI format"),