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
25 #include "libavutil/intreadwrite.h"
26 #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 dprintf(NULL
, "%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;
255 uint64_t list_end
= 0;
257 avi
->stream_index
= -1;
259 if (get_riff(s
, pb
) < 0)
262 avi
->fsize
= url_fsize(pb
);
264 avi
->fsize
= avi
->riff_end
== 8 ? INT64_MAX
: avi
->riff_end
;
276 print_tag("tag", tag
, size
);
280 case MKTAG('L', 'I', 'S', 'T'):
281 list_end
= url_ftell(pb
) + size
;
282 /* Ignored, except at start of video packets. */
285 print_tag("list", tag1
, 0);
287 if (tag1
== MKTAG('m', 'o', 'v', 'i')) {
288 avi
->movi_list
= url_ftell(pb
) - 4;
289 if(size
) avi
->movi_end
= avi
->movi_list
+ size
+ (size
& 1);
290 else avi
->movi_end
= url_fsize(pb
);
292 dprintf(NULL
, "movi end=%"PRIx64
"\n", avi
->movi_end
);
297 case MKTAG('d', 'm', 'l', 'h'):
299 url_fskip(pb
, size
+ (size
& 1));
301 case MKTAG('a', 'm', 'v', 'h'):
303 case MKTAG('a', 'v', 'i', 'h'):
305 /* using frame_period is bad idea */
306 frame_period
= get_le32(pb
);
307 bit_rate
= get_le32(pb
) * 8;
309 avi
->non_interleaved
|= get_le32(pb
) & AVIF_MUSTUSEINDEX
;
311 url_fskip(pb
, 2 * 4);
314 avih_width
=get_le32(pb
);
315 avih_height
=get_le32(pb
);
317 url_fskip(pb
, size
- 10 * 4);
319 case MKTAG('s', 't', 'r', 'h'):
323 handler
= get_le32(pb
); /* codec tag */
325 if(tag1
== MKTAG('p', 'a', 'd', 's')){
326 url_fskip(pb
, size
- 8);
330 st
= av_new_stream(s
, stream_index
);
334 ast
= av_mallocz(sizeof(AVIStream
));
340 tag1
= stream_index
? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
343 print_tag("strh", tag1
, -1);
345 if(tag1
== MKTAG('i', 'a', 'v', 's') || tag1
== MKTAG('i', 'v', 'a', 's')){
349 * After some consideration -- I don't think we
350 * have to support anything but DV in type1 AVIs.
352 if (s
->nb_streams
!= 1)
355 if (handler
!= MKTAG('d', 'v', 's', 'd') &&
356 handler
!= MKTAG('d', 'v', 'h', 'd') &&
357 handler
!= MKTAG('d', 'v', 's', 'l'))
360 ast
= s
->streams
[0]->priv_data
;
361 av_freep(&s
->streams
[0]->codec
->extradata
);
362 av_freep(&s
->streams
[0]);
364 if (CONFIG_DV_DEMUXER
) {
365 avi
->dv_demux
= dv_init_demux(s
);
369 s
->streams
[0]->priv_data
= ast
;
370 url_fskip(pb
, 3 * 4);
371 ast
->scale
= get_le32(pb
);
372 ast
->rate
= get_le32(pb
);
373 url_fskip(pb
, 4); /* start time */
375 dv_dur
= get_le32(pb
);
376 if (ast
->scale
> 0 && ast
->rate
> 0 && dv_dur
> 0) {
377 dv_dur
*= AV_TIME_BASE
;
378 s
->duration
= av_rescale(dv_dur
, ast
->scale
, ast
->rate
);
381 * else, leave duration alone; timing estimation in utils.c
382 * will make a guess based on bitrate.
385 stream_index
= s
->nb_streams
- 1;
386 url_fskip(pb
, size
- 9*4);
390 assert(stream_index
< s
->nb_streams
);
391 st
->codec
->stream_codec_tag
= handler
;
393 get_le32(pb
); /* flags */
394 get_le16(pb
); /* priority */
395 get_le16(pb
); /* language */
396 get_le32(pb
); /* initial frame */
397 ast
->scale
= get_le32(pb
);
398 ast
->rate
= get_le32(pb
);
399 if(!(ast
->scale
&& ast
->rate
)){
400 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
);
403 ast
->scale
= frame_period
;
409 av_set_pts_info(st
, 64, ast
->scale
, ast
->rate
);
411 ast
->cum_len
=get_le32(pb
); /* start */
412 nb_frames
= get_le32(pb
);
415 st
->duration
= nb_frames
;
416 get_le32(pb
); /* buffer size */
417 get_le32(pb
); /* quality */
418 ast
->sample_size
= get_le32(pb
); /* sample ssize */
419 ast
->cum_len
*= FFMAX(1, ast
->sample_size
);
420 // av_log(s, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
423 case MKTAG('v', 'i', 'd', 's'):
424 codec_type
= CODEC_TYPE_VIDEO
;
426 ast
->sample_size
= 0;
428 case MKTAG('a', 'u', 'd', 's'):
429 codec_type
= CODEC_TYPE_AUDIO
;
431 case MKTAG('t', 'x', 't', 's'):
433 codec_type
= CODEC_TYPE_DATA
; //CODEC_TYPE_SUB ? FIXME
435 case MKTAG('d', 'a', 't', 's'):
436 codec_type
= CODEC_TYPE_DATA
;
439 av_log(s
, AV_LOG_ERROR
, "unknown stream type %X\n", tag1
);
442 ast
->frame_offset
= ast
->cum_len
;
443 url_fskip(pb
, size
- 12 * 4);
445 case MKTAG('s', 't', 'r', 'f'):
447 if (stream_index
>= (unsigned)s
->nb_streams
|| avi
->dv_demux
) {
450 uint64_t cur_pos
= url_ftell(pb
);
451 if (cur_pos
< list_end
)
452 size
= FFMIN(size
, list_end
- cur_pos
);
453 st
= s
->streams
[stream_index
];
455 case CODEC_TYPE_VIDEO
:
457 st
->codec
->width
=avih_width
;
458 st
->codec
->height
=avih_height
;
459 st
->codec
->codec_type
= CODEC_TYPE_VIDEO
;
460 st
->codec
->codec_id
= CODEC_ID_AMV
;
464 get_le32(pb
); /* size */
465 st
->codec
->width
= get_le32(pb
);
466 st
->codec
->height
= (int32_t)get_le32(pb
);
467 get_le16(pb
); /* panes */
468 st
->codec
->bits_per_coded_sample
= get_le16(pb
); /* depth */
470 get_le32(pb
); /* ImageSize */
471 get_le32(pb
); /* XPelsPerMeter */
472 get_le32(pb
); /* YPelsPerMeter */
473 get_le32(pb
); /* ClrUsed */
474 get_le32(pb
); /* ClrImportant */
476 if (tag1
== MKTAG('D', 'X', 'S', 'B')) {
477 st
->codec
->codec_type
= CODEC_TYPE_SUBTITLE
;
478 st
->codec
->codec_tag
= tag1
;
479 st
->codec
->codec_id
= CODEC_ID_XSUB
;
483 if(size
> 10*4 && size
<(1<<30)){
484 st
->codec
->extradata_size
= size
- 10*4;
485 st
->codec
->extradata
= av_malloc(st
->codec
->extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
486 if (!st
->codec
->extradata
) {
487 st
->codec
->extradata_size
= 0;
488 return AVERROR(ENOMEM
);
490 get_buffer(pb
, st
->codec
->extradata
, st
->codec
->extradata_size
);
493 if(st
->codec
->extradata_size
& 1) //FIXME check if the encoder really did this correctly
496 /* Extract palette from extradata if bpp <= 8. */
497 /* This code assumes that extradata contains only palette. */
498 /* This is true for all paletted codecs implemented in FFmpeg. */
499 if (st
->codec
->extradata_size
&& (st
->codec
->bits_per_coded_sample
<= 8)) {
500 st
->codec
->palctrl
= av_mallocz(sizeof(AVPaletteControl
));
501 #ifdef WORDS_BIGENDIAN
502 for (i
= 0; i
< FFMIN(st
->codec
->extradata_size
, AVPALETTE_SIZE
)/4; i
++)
503 st
->codec
->palctrl
->palette
[i
] = bswap_32(((uint32_t*)st
->codec
->extradata
)[i
]);
505 memcpy(st
->codec
->palctrl
->palette
, st
->codec
->extradata
,
506 FFMIN(st
->codec
->extradata_size
, AVPALETTE_SIZE
));
508 st
->codec
->palctrl
->palette_changed
= 1;
512 print_tag("video", tag1
, 0);
514 st
->codec
->codec_type
= CODEC_TYPE_VIDEO
;
515 st
->codec
->codec_tag
= tag1
;
516 st
->codec
->codec_id
= ff_codec_get_id(ff_codec_bmp_tags
, tag1
);
517 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
; // This is needed to get the pict type which is necessary for generating correct pts.
519 if(st
->codec
->codec_tag
==0 && st
->codec
->height
> 0 && st
->codec
->extradata_size
< 1U<<30){
520 st
->codec
->extradata_size
+= 9;
521 st
->codec
->extradata
= av_realloc(st
->codec
->extradata
, st
->codec
->extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
522 if(st
->codec
->extradata
)
523 memcpy(st
->codec
->extradata
+ st
->codec
->extradata_size
- 9, "BottomUp", 9);
525 st
->codec
->height
= FFABS(st
->codec
->height
);
527 // url_fskip(pb, size - 5 * 4);
529 case CODEC_TYPE_AUDIO
:
530 ff_get_wav_header(pb
, st
->codec
, size
);
531 if(ast
->sample_size
&& st
->codec
->block_align
&& ast
->sample_size
!= st
->codec
->block_align
){
532 av_log(s
, AV_LOG_WARNING
, "sample size (%d) != block align (%d)\n", ast
->sample_size
, st
->codec
->block_align
);
533 ast
->sample_size
= st
->codec
->block_align
;
535 if (size
%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
537 /* Force parsing as several audio frames can be in
538 * one packet and timestamps refer to packet start. */
539 st
->need_parsing
= AVSTREAM_PARSE_TIMESTAMPS
;
540 /* ADTS header is in extradata, AAC without header must be
541 * stored as exact frames. Parser not needed and it will
543 if (st
->codec
->codec_id
== CODEC_ID_AAC
&& st
->codec
->extradata_size
)
544 st
->need_parsing
= AVSTREAM_PARSE_NONE
;
545 /* AVI files with Xan DPCM audio (wrongly) declare PCM
546 * audio in the header but have Axan as stream_code_tag. */
547 if (st
->codec
->stream_codec_tag
== AV_RL32("Axan")){
548 st
->codec
->codec_id
= CODEC_ID_XAN_DPCM
;
549 st
->codec
->codec_tag
= 0;
552 st
->codec
->codec_id
= CODEC_ID_ADPCM_IMA_AMV
;
555 st
->codec
->codec_type
= CODEC_TYPE_DATA
;
556 st
->codec
->codec_id
= CODEC_ID_NONE
;
557 st
->codec
->codec_tag
= 0;
563 case MKTAG('i', 'n', 'd', 'x'):
565 if(!url_is_streamed(pb
) && !(s
->flags
& AVFMT_FLAG_IGNIDX
)){
566 read_braindead_odml_indx(s
, 0);
568 url_fseek(pb
, i
+size
, SEEK_SET
);
570 case MKTAG('v', 'p', 'r', 'p'):
571 if(stream_index
< (unsigned)s
->nb_streams
&& size
> 9*4){
572 AVRational active
, active_aspect
;
574 st
= s
->streams
[stream_index
];
581 active_aspect
.den
= get_le16(pb
);
582 active_aspect
.num
= get_le16(pb
);
583 active
.num
= get_le32(pb
);
584 active
.den
= get_le32(pb
);
585 get_le32(pb
); //nbFieldsPerFrame
587 if(active_aspect
.num
&& active_aspect
.den
&& active
.num
&& active
.den
){
588 st
->sample_aspect_ratio
= av_div_q(active_aspect
, active
);
589 //av_log(s, AV_LOG_ERROR, "vprp %d/%d %d/%d\n", active_aspect.num, active_aspect.den, active.num, active.den);
593 url_fseek(pb
, size
, SEEK_CUR
);
595 case MKTAG('I', 'N', 'A', 'M'):
596 avi_read_tag(s
, "Title", size
);
598 case MKTAG('I', 'A', 'R', 'T'):
599 avi_read_tag(s
, "Artist", size
);
601 case MKTAG('I', 'C', 'O', 'P'):
602 avi_read_tag(s
, "Copyright", size
);
604 case MKTAG('I', 'C', 'M', 'T'):
605 avi_read_tag(s
, "Comment", size
);
607 case MKTAG('I', 'G', 'N', 'R'):
608 avi_read_tag(s
, "Genre", size
);
610 case MKTAG('I', 'P', 'R', 'D'):
611 avi_read_tag(s
, "Album", size
);
613 case MKTAG('I', 'P', 'R', 'T'):
614 avi_read_tag(s
, "Track", size
);
618 av_log(s
, AV_LOG_ERROR
, "Something went wrong during header parsing, "
619 "I will ignore it and try to continue anyway.\n");
620 avi
->movi_list
= url_ftell(pb
) - 4;
621 avi
->movi_end
= url_fsize(pb
);
631 /* check stream number */
632 if (stream_index
!= s
->nb_streams
- 1) {
637 if(!avi
->index_loaded
&& !url_is_streamed(pb
))
639 avi
->index_loaded
= 1;
640 avi
->non_interleaved
|= guess_ni_flag(s
);
641 if(avi
->non_interleaved
) {
642 av_log(s
, AV_LOG_INFO
, "non-interleaved AVI\n");
649 static int get_stream_idx(int *d
){
650 if( d
[0] >= '0' && d
[0] <= '9'
651 && d
[1] >= '0' && d
[1] <= '9'){
652 return (d
[0] - '0') * 10 + (d
[1] - '0');
654 return 100; //invalid stream ID
658 static int avi_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
660 AVIContext
*avi
= s
->priv_data
;
661 ByteIOContext
*pb
= s
->pb
;
667 if (CONFIG_DV_DEMUXER
&& avi
->dv_demux
) {
668 int size
= dv_get_packet(avi
->dv_demux
, pkt
);
673 if(avi
->non_interleaved
){
674 int best_stream_index
= 0;
675 AVStream
*best_st
= NULL
;
677 int64_t best_ts
= INT64_MAX
;
680 for(i
=0; i
<s
->nb_streams
; i
++){
681 AVStream
*st
= s
->streams
[i
];
682 AVIStream
*ast
= st
->priv_data
;
683 int64_t ts
= ast
->frame_offset
;
686 ts
/= ast
->sample_size
;
687 ts
= av_rescale(ts
, AV_TIME_BASE
* (int64_t)st
->time_base
.num
, st
->time_base
.den
);
689 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
690 if(ts
< best_ts
&& st
->nb_index_entries
){
693 best_stream_index
= i
;
699 best_ast
= best_st
->priv_data
;
700 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
701 if(best_ast
->remaining
)
702 i
= av_index_search_timestamp(best_st
, best_ts
, AVSEEK_FLAG_ANY
| AVSEEK_FLAG_BACKWARD
);
704 i
= av_index_search_timestamp(best_st
, best_ts
, AVSEEK_FLAG_ANY
);
706 best_ast
->frame_offset
= best_st
->index_entries
[i
].timestamp
707 * FFMAX(1, best_ast
->sample_size
);
710 // av_log(s, AV_LOG_DEBUG, "%d\n", i);
712 int64_t pos
= best_st
->index_entries
[i
].pos
;
713 pos
+= best_ast
->packet_size
- best_ast
->remaining
;
714 url_fseek(s
->pb
, pos
+ 8, SEEK_SET
);
715 // av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
717 assert(best_ast
->remaining
<= best_ast
->packet_size
);
719 avi
->stream_index
= best_stream_index
;
720 if(!best_ast
->remaining
)
721 best_ast
->packet_size
=
722 best_ast
->remaining
= best_st
->index_entries
[i
].size
;
727 if(avi
->stream_index
>= 0){
728 AVStream
*st
= s
->streams
[ avi
->stream_index
];
729 AVIStream
*ast
= st
->priv_data
;
732 if(ast
->sample_size
<= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
734 else if(ast
->sample_size
< 32)
735 size
= 64*ast
->sample_size
;
737 size
= ast
->sample_size
;
739 if(size
> ast
->remaining
)
740 size
= ast
->remaining
;
741 avi
->last_pkt_pos
= url_ftell(pb
);
742 err
= av_get_packet(pb
, pkt
, size
);
746 if(ast
->has_pal
&& pkt
->data
&& pkt
->size
<(unsigned)INT_MAX
/2){
747 void *ptr
= av_realloc(pkt
->data
, pkt
->size
+ 4*256 + FF_INPUT_BUFFER_PADDING_SIZE
);
752 memcpy(pkt
->data
+ pkt
->size
- 4*256, ast
->pal
, 4*256);
754 av_log(s
, AV_LOG_ERROR
, "Failed to append palette\n");
757 if (CONFIG_DV_DEMUXER
&& avi
->dv_demux
) {
758 dstr
= pkt
->destruct
;
759 size
= dv_produce_packet(avi
->dv_demux
, pkt
,
760 pkt
->data
, pkt
->size
);
761 pkt
->destruct
= dstr
;
762 pkt
->flags
|= PKT_FLAG_KEY
;
764 /* XXX: How to handle B-frames in AVI? */
765 pkt
->dts
= ast
->frame_offset
;
766 // pkt->dts += ast->start;
768 pkt
->dts
/= ast
->sample_size
;
769 //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);
770 pkt
->stream_index
= avi
->stream_index
;
772 if (st
->codec
->codec_type
== CODEC_TYPE_VIDEO
) {
775 assert(st
->index_entries
);
777 index
= av_index_search_timestamp(st
, pkt
->dts
, 0);
778 e
= &st
->index_entries
[index
];
780 if(index
>= 0 && e
->timestamp
== ast
->frame_offset
){
781 if (e
->flags
& AVINDEX_KEYFRAME
)
782 pkt
->flags
|= PKT_FLAG_KEY
;
785 pkt
->flags
|= PKT_FLAG_KEY
;
788 ast
->frame_offset
+= pkt
->size
;
792 ast
->remaining
-= size
;
794 avi
->stream_index
= -1;
801 memset(d
, -1, sizeof(int)*8);
802 for(i
=sync
=url_ftell(pb
); !url_feof(pb
); i
++) {
809 size
= d
[4] + (d
[5]<<8) + (d
[6]<<16) + (d
[7]<<24);
811 n
= get_stream_idx(d
+2);
812 //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);
813 if(i
+ (uint64_t)size
> avi
->fsize
|| d
[0]<0)
817 if( (d
[0] == 'i' && d
[1] == 'x' && n
< s
->nb_streams
)
819 ||(d
[0] == 'J' && d
[1] == 'U' && d
[2] == 'N' && d
[3] == 'K')
820 ||(d
[0] == 'i' && d
[1] == 'd' && d
[2] == 'x' && d
[3] == '1')){
822 //av_log(s, AV_LOG_DEBUG, "SKIP\n");
826 n
= get_stream_idx(d
);
828 if(!((i
-avi
->last_pkt_pos
)&1) && get_stream_idx(d
+1) < s
->nb_streams
)
832 if(n
< s
->nb_streams
){
838 if(s
->nb_streams
>=2){
839 AVStream
*st1
= s
->streams
[1];
840 AVIStream
*ast1
= st1
->priv_data
;
841 //workaround for broken small-file-bug402.avi
842 if( d
[2] == 'w' && d
[3] == 'b'
844 && st
->codec
->codec_type
== CODEC_TYPE_VIDEO
845 && st1
->codec
->codec_type
== CODEC_TYPE_AUDIO
846 && ast
->prefix
== 'd'*256+'c'
847 && (d
[2]*256+d
[3] == ast1
->prefix
|| !ast1
->prefix_count
)
852 av_log(s
, AV_LOG_WARNING
, "Invalid stream + prefix combination, assuming audio.\n");
857 if( (st
->discard
>= AVDISCARD_DEFAULT
&& size
==0)
858 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
859 || st
->discard
>= AVDISCARD_ALL
){
860 if(ast
->sample_size
) ast
->frame_offset
+= pkt
->size
;
861 else ast
->frame_offset
++;
866 if (d
[2] == 'p' && d
[3] == 'c' && size
<=4*256+4) {
867 int k
= get_byte(pb
);
868 int last
= (k
+ get_byte(pb
) - 1) & 0xFF;
870 get_le16(pb
); //flags
872 for (; k
<= last
; k
++)
873 ast
->pal
[k
] = get_be32(pb
)>>8;// b + (g << 8) + (r << 16);
876 } else if( ((ast
->prefix_count
<5 || sync
+9 > i
) && d
[2]<128 && d
[3]<128) ||
877 d
[2]*256+d
[3] == ast
->prefix
/*||
878 (d[2] == 'd' && d[3] == 'c') ||
879 (d[2] == 'w' && d[3] == 'b')*/) {
881 //av_log(s, AV_LOG_DEBUG, "OK\n");
882 if(d
[2]*256+d
[3] == ast
->prefix
)
885 ast
->prefix
= d
[2]*256+d
[3];
886 ast
->prefix_count
= 0;
889 avi
->stream_index
= n
;
890 ast
->packet_size
= size
+ 8;
891 ast
->remaining
= size
;
894 uint64_t pos
= url_ftell(pb
) - 8;
895 if(!st
->index_entries
|| !st
->nb_index_entries
|| st
->index_entries
[st
->nb_index_entries
- 1].pos
< pos
){
896 av_add_index_entry(st
, pos
, ast
->frame_offset
/ FFMAX(1, ast
->sample_size
), size
, 0, AVINDEX_KEYFRAME
);
907 /* XXX: We make the implicit supposition that the positions are sorted
909 static int avi_read_idx1(AVFormatContext
*s
, int size
)
911 AVIContext
*avi
= s
->priv_data
;
912 ByteIOContext
*pb
= s
->pb
;
913 int nb_index_entries
, i
;
916 unsigned int index
, tag
, flags
, pos
, len
;
917 unsigned last_pos
= -1;
919 nb_index_entries
= size
/ 16;
920 if (nb_index_entries
<= 0)
923 /* Read the entries and sort them in each stream component. */
924 for(i
= 0; i
< nb_index_entries
; i
++) {
926 flags
= get_le32(pb
);
929 #if defined(DEBUG_SEEK)
930 av_log(s
, AV_LOG_DEBUG
, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
931 i
, tag
, flags
, pos
, len
);
933 if(i
==0 && pos
> avi
->movi_list
)
934 avi
->movi_list
= 0; //FIXME better check
935 pos
+= avi
->movi_list
;
937 index
= ((tag
& 0xff) - '0') * 10;
938 index
+= ((tag
>> 8) & 0xff) - '0';
939 if (index
>= s
->nb_streams
)
941 st
= s
->streams
[index
];
944 #if defined(DEBUG_SEEK)
945 av_log(s
, AV_LOG_DEBUG
, "%d cum_len=%"PRId64
"\n", len
, ast
->cum_len
);
951 avi
->non_interleaved
= 1;
953 av_add_index_entry(st
, pos
, ast
->cum_len
/ FFMAX(1, ast
->sample_size
), len
, 0, (flags
&AVIIF_INDEX
) ? AVINDEX_KEYFRAME
: 0);
963 static int guess_ni_flag(AVFormatContext
*s
){
965 int64_t last_start
=0;
966 int64_t first_end
= INT64_MAX
;
967 int64_t oldpos
= url_ftell(s
->pb
);
969 for(i
=0; i
<s
->nb_streams
; i
++){
970 AVStream
*st
= s
->streams
[i
];
971 int n
= st
->nb_index_entries
;
978 int64_t pos
= st
->index_entries
[0].pos
;
979 url_fseek(s
->pb
, pos
+ 4, SEEK_SET
);
980 size
= get_le32(s
->pb
);
981 if(pos
+ size
> st
->index_entries
[1].pos
)
982 last_start
= INT64_MAX
;
985 if(st
->index_entries
[0].pos
> last_start
)
986 last_start
= st
->index_entries
[0].pos
;
987 if(st
->index_entries
[n
-1].pos
< first_end
)
988 first_end
= st
->index_entries
[n
-1].pos
;
990 url_fseek(s
->pb
, oldpos
, SEEK_SET
);
991 return last_start
> first_end
;
994 static int avi_load_index(AVFormatContext
*s
)
996 AVIContext
*avi
= s
->priv_data
;
997 ByteIOContext
*pb
= s
->pb
;
999 int64_t pos
= url_ftell(pb
);
1001 url_fseek(pb
, avi
->movi_end
, SEEK_SET
);
1003 printf("movi_end=0x%"PRIx64
"\n", avi
->movi_end
);
1009 size
= get_le32(pb
);
1011 printf("tag=%c%c%c%c size=0x%x\n",
1019 case MKTAG('i', 'd', 'x', '1'):
1020 if (avi_read_idx1(s
, size
) < 0)
1028 url_fskip(pb
, size
);
1033 url_fseek(pb
, pos
, SEEK_SET
);
1037 static int avi_read_seek(AVFormatContext
*s
, int stream_index
, int64_t timestamp
, int flags
)
1039 AVIContext
*avi
= s
->priv_data
;
1044 if (!avi
->index_loaded
) {
1045 /* we only load the index on demand */
1047 avi
->index_loaded
= 1;
1049 assert(stream_index
>= 0);
1051 st
= s
->streams
[stream_index
];
1052 index
= av_index_search_timestamp(st
, timestamp
, flags
);
1056 /* find the position */
1057 pos
= st
->index_entries
[index
].pos
;
1058 timestamp
= st
->index_entries
[index
].timestamp
;
1060 // av_log(s, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
1062 if (CONFIG_DV_DEMUXER
&& avi
->dv_demux
) {
1063 /* One and only one real stream for DV in AVI, and it has video */
1064 /* offsets. Calling with other stream indexes should have failed */
1065 /* the av_index_search_timestamp call above. */
1066 assert(stream_index
== 0);
1068 /* Feed the DV video stream version of the timestamp to the */
1069 /* DV demux so it can synthesize correct timestamps. */
1070 dv_offset_reset(avi
->dv_demux
, timestamp
);
1072 url_fseek(s
->pb
, pos
, SEEK_SET
);
1073 avi
->stream_index
= -1;
1077 for(i
= 0; i
< s
->nb_streams
; i
++) {
1078 AVStream
*st2
= s
->streams
[i
];
1079 AVIStream
*ast2
= st2
->priv_data
;
1084 if (st2
->nb_index_entries
<= 0)
1087 // assert(st2->codec->block_align);
1088 assert((int64_t)st2
->time_base
.num
*ast2
->rate
== (int64_t)st2
->time_base
.den
*ast2
->scale
);
1089 index
= av_index_search_timestamp(
1091 av_rescale(timestamp
, st2
->time_base
.den
*(int64_t)st
->time_base
.num
, st
->time_base
.den
* (int64_t)st2
->time_base
.num
),
1092 flags
| AVSEEK_FLAG_BACKWARD
);
1096 if(!avi
->non_interleaved
){
1097 while(index
>0 && st2
->index_entries
[index
].pos
> pos
)
1099 while(index
+1 < st2
->nb_index_entries
&& st2
->index_entries
[index
].pos
< pos
)
1103 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
1104 /* extract the current frame number */
1105 ast2
->frame_offset
= st2
->index_entries
[index
].timestamp
;
1106 if(ast2
->sample_size
)
1107 ast2
->frame_offset
*=ast2
->sample_size
;
1111 url_fseek(s
->pb
, pos
, SEEK_SET
);
1112 avi
->stream_index
= -1;
1116 static int avi_read_close(AVFormatContext
*s
)
1119 AVIContext
*avi
= s
->priv_data
;
1121 for(i
=0;i
<s
->nb_streams
;i
++) {
1122 AVStream
*st
= s
->streams
[i
];
1123 av_free(st
->codec
->palctrl
);
1127 av_free(avi
->dv_demux
);
1132 static int avi_probe(AVProbeData
*p
)
1136 /* check file header */
1137 for(i
=0; avi_headers
[i
][0]; i
++)
1138 if(!memcmp(p
->buf
, avi_headers
[i
] , 4) &&
1139 !memcmp(p
->buf
+8, avi_headers
[i
]+4, 4))
1140 return AVPROBE_SCORE_MAX
;
1145 AVInputFormat avi_demuxer
= {
1147 NULL_IF_CONFIG_SMALL("AVI format"),