Indentation
[libav.git] / libavformat / avidec.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * AVI demuxer
19720f15 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
19720f15
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
FB
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
19720f15 17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 20 */
de6d9b64
FB
21#include "avformat.h"
22#include "avi.h"
7458ccbb 23#include "dv.h"
9d9f4119 24#include "riff.h"
de6d9b64 25
52a0bbff
MN
26#undef NDEBUG
27#include <assert.h>
28
de6d9b64 29//#define DEBUG
155e9ee9
FB
30//#define DEBUG_SEEK
31
155e9ee9 32typedef struct AVIStream {
7c7f3866 33 int64_t frame_offset; /* current frame (video) or byte (audio) counter
155e9ee9 34 (used to compute the pts) */
7c7f3866
MN
35 int remaining;
36 int packet_size;
37
155e9ee9 38 int scale;
115329f1 39 int rate;
8223bca5 40 int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
115329f1 41
94d1d6c0 42 int64_t cum_len; /* temporary storage (used during seek) */
115329f1 43
d2c5f0a4
MN
44 int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
45 int prefix_count;
155e9ee9 46} AVIStream;
de6d9b64
FB
47
48typedef struct {
7458ccbb
RS
49 int64_t riff_end;
50 int64_t movi_end;
ea4b2b5e 51 int64_t fsize;
de6d9b64 52 offset_t movi_list;
155e9ee9 53 int index_loaded;
8f9298f8 54 int is_odml;
7c7f3866
MN
55 int non_interleaved;
56 int stream_index;
ddaae6a9 57 DVDemuxContext* dv_demux;
de6d9b64
FB
58} AVIContext;
59
42feef6b 60static int avi_load_index(AVFormatContext *s);
30a43f2d 61static int guess_ni_flag(AVFormatContext *s);
42feef6b 62
de6d9b64 63#ifdef DEBUG
1101abfe 64static void print_tag(const char *str, unsigned int tag, int size)
de6d9b64
FB
65{
66 printf("%s: tag=%c%c%c%c size=0x%x\n",
67 str, tag & 0xff,
68 (tag >> 8) & 0xff,
69 (tag >> 16) & 0xff,
70 (tag >> 24) & 0xff,
71 size);
72}
73#endif
74
06219cb1
RS
75static int get_riff(AVIContext *avi, ByteIOContext *pb)
76{
115329f1 77 uint32_t tag;
06219cb1
RS
78 /* check RIFF header */
79 tag = get_le32(pb);
80
81 if (tag != MKTAG('R', 'I', 'F', 'F'))
82 return -1;
83 avi->riff_end = get_le32(pb); /* RIFF chunk size */
84 avi->riff_end += url_ftell(pb); /* RIFF chunk end */
85 tag = get_le32(pb);
d09ea618
MN
86 if(tag == MKTAG('A', 'V', 'I', 0x19))
87 av_log(NULL, AV_LOG_INFO, "file has been generated with a totally broken muxer\n");
88 else
06219cb1
RS
89 if (tag != MKTAG('A', 'V', 'I', ' ') && tag != MKTAG('A', 'V', 'I', 'X'))
90 return -1;
115329f1 91
06219cb1
RS
92 return 0;
93}
94
94d1d6c0 95static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
8945ebb9 96 AVIContext *avi = s->priv_data;
94d1d6c0
MN
97 ByteIOContext *pb = &s->pb;
98 int longs_pre_entry= get_le16(pb);
99 int index_sub_type = get_byte(pb);
100 int index_type = get_byte(pb);
101 int entries_in_use = get_le32(pb);
102 int chunk_id = get_le32(pb);
103 int64_t base = get_le64(pb);
104 int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
105 AVStream *st;
106 AVIStream *ast;
107 int i;
8945ebb9 108 int64_t last_pos= -1;
965a63af 109 int64_t filesize= url_fsize(&s->pb);
94d1d6c0 110
965a63af 111#ifdef DEBUG_SEEK
949b1a13 112 av_log(s, AV_LOG_ERROR, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64"\n",
965a63af
MN
113 longs_pre_entry,index_type, entries_in_use, chunk_id, base);
114#endif
94d1d6c0
MN
115
116 if(stream_id > s->nb_streams || stream_id < 0)
117 return -1;
118 st= s->streams[stream_id];
119 ast = st->priv_data;
120
121 if(index_sub_type)
122 return -1;
123
124 get_le32(pb);
125
126 if(index_type && longs_pre_entry != 2)
127 return -1;
128 if(index_type>1)
129 return -1;
130
965a63af
MN
131 if(filesize > 0 && base >= filesize){
132 av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
133 if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF)
134 base &= 0xFFFFFFFF;
135 else
136 return -1;
137 }
138
94d1d6c0
MN
139 for(i=0; i<entries_in_use; i++){
140 if(index_type){
30a43f2d 141 int64_t pos= get_le32(pb) + base - 8;
94d1d6c0 142 int len = get_le32(pb);
30a43f2d 143 int key= len >= 0;
94d1d6c0
MN
144 len &= 0x7FFFFFFF;
145
965a63af 146#ifdef DEBUG_SEEK
949b1a13 147 av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
965a63af 148#endif
8945ebb9
MN
149 if(last_pos == pos || pos == base - 8)
150 avi->non_interleaved= 1;
151 else
2b70eb2b 152 av_add_index_entry(st, pos, ast->cum_len / FFMAX(1, ast->sample_size), len, 0, key ? AVINDEX_KEYFRAME : 0);
30a43f2d 153
94d1d6c0 154 if(ast->sample_size)
2b70eb2b 155 ast->cum_len += len;
94d1d6c0
MN
156 else
157 ast->cum_len ++;
8945ebb9 158 last_pos= pos;
94d1d6c0 159 }else{
26b89135
MR
160 int64_t offset, pos;
161 int duration;
162 offset = get_le64(pb);
163 get_le32(pb); /* size */
164 duration = get_le32(pb);
165 pos = url_ftell(pb);
94d1d6c0
MN
166
167 url_fseek(pb, offset+8, SEEK_SET);
168 read_braindead_odml_indx(s, frame_num);
169 frame_num += duration;
170
171 url_fseek(pb, pos, SEEK_SET);
172 }
173 }
965a63af 174 avi->index_loaded=1;
94d1d6c0
MN
175 return 0;
176}
177
115e8ae5 178static void clean_index(AVFormatContext *s){
965a63af
MN
179 int i;
180 int64_t j;
115e8ae5
MN
181
182 for(i=0; i<s->nb_streams; i++){
183 AVStream *st = s->streams[i];
184 AVIStream *ast = st->priv_data;
185 int n= st->nb_index_entries;
186 int max= ast->sample_size;
187 int64_t pos, size, ts;
188
189 if(n != 1 || ast->sample_size==0)
190 continue;
191
192 while(max < 1024) max+=max;
193
194 pos= st->index_entries[0].pos;
195 size= st->index_entries[0].size;
196 ts= st->index_entries[0].timestamp;
197
198 for(j=0; j<size; j+=max){
199 av_add_index_entry(st, pos+j, ts + j/ast->sample_size, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME);
200 }
201 }
202}
203
57060f89
DC
204static int avi_read_tag(ByteIOContext *pb, char *buf, int maxlen, unsigned int size)
205{
206 offset_t i = url_ftell(pb);
207 size += (size & 1);
208 get_strz(pb, buf, maxlen);
209 url_fseek(pb, i+size, SEEK_SET);
210 return 0;
211}
212
1101abfe 213static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
de6d9b64 214{
c9a65ca8 215 AVIContext *avi = s->priv_data;
de6d9b64 216 ByteIOContext *pb = &s->pb;
deb0a292 217 uint32_t tag, tag1, handler;
b53f1064 218 int codec_type, stream_index, frame_period, bit_rate;
247eadca 219 unsigned int size, nb_frames;
6d29fba9 220 int i;
de6d9b64 221 AVStream *st;
26b89135 222 AVIStream *ast = NULL;
2ad4648f 223 char str_track[4];
de6d9b64 224
7c7f3866 225 avi->stream_index= -1;
115329f1 226
06219cb1 227 if (get_riff(avi, pb) < 0)
de6d9b64 228 return -1;
1101abfe 229
ea4b2b5e
MN
230 avi->fsize = url_fsize(pb);
231 if(avi->fsize<=0)
232 avi->fsize= avi->riff_end;
233
de6d9b64
FB
234 /* first list tag */
235 stream_index = -1;
236 codec_type = -1;
237 frame_period = 0;
238 for(;;) {
239 if (url_feof(pb))
240 goto fail;
241 tag = get_le32(pb);
242 size = get_le32(pb);
243#ifdef DEBUG
244 print_tag("tag", tag, size);
245#endif
246
247 switch(tag) {
248 case MKTAG('L', 'I', 'S', 'T'):
249 /* ignored, except when start of video packets */
250 tag1 = get_le32(pb);
251#ifdef DEBUG
252 print_tag("list", tag1, 0);
253#endif
254 if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
155e9ee9 255 avi->movi_list = url_ftell(pb) - 4;
2064c77a 256 if(size) avi->movi_end = avi->movi_list + size + (size & 1);
a965c478 257 else avi->movi_end = url_fsize(pb);
de6d9b64 258#ifdef DEBUG
949b1a13 259 printf("movi end=%"PRIx64"\n", avi->movi_end);
de6d9b64
FB
260#endif
261 goto end_of_header;
262 }
263 break;
8f9298f8 264 case MKTAG('d', 'm', 'l', 'h'):
bb270c08
DB
265 avi->is_odml = 1;
266 url_fskip(pb, size + (size & 1));
267 break;
de6d9b64 268 case MKTAG('a', 'v', 'i', 'h'):
bb270c08 269 /* avi header */
1101abfe 270 /* using frame_period is bad idea */
de6d9b64
FB
271 frame_period = get_le32(pb);
272 bit_rate = get_le32(pb) * 8;
1894edeb
MN
273 get_le32(pb);
274 avi->non_interleaved |= get_le32(pb) & AVIF_MUSTUSEINDEX;
275
276 url_fskip(pb, 2 * 4);
6d29fba9
MN
277 get_le32(pb);
278
279 url_fskip(pb, size - 7 * 4);
280 break;
281 case MKTAG('s', 't', 'r', 'h'):
282 /* stream header */
283
284 tag1 = get_le32(pb);
285 handler = get_le32(pb); /* codec tag */
286
287 if(tag1 == MKTAG('p', 'a', 'd', 's')){
288 url_fskip(pb, size - 8);
289 break;
290 }else{
291 stream_index++;
292 st = av_new_stream(s, stream_index);
de6d9b64
FB
293 if (!st)
294 goto fail;
9ee91c2f 295
155e9ee9
FB
296 ast = av_mallocz(sizeof(AVIStream));
297 if (!ast)
298 goto fail;
299 st->priv_data = ast;
bb270c08 300 }
6d29fba9 301
cc11e2b3 302#ifdef DEBUG
e344c1ea 303 print_tag("strh", tag1, -1);
cc11e2b3 304#endif
b53f1064 305 if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
6eb2de74
RS
306 int64_t dv_dur;
307
115329f1 308 /*
bb270c08
DB
309 * After some consideration -- I don't think we
310 * have to support anything but DV in a type1 AVIs.
311 */
312 if (s->nb_streams != 1)
313 goto fail;
314
315 if (handler != MKTAG('d', 'v', 's', 'd') &&
316 handler != MKTAG('d', 'v', 'h', 'd') &&
317 handler != MKTAG('d', 'v', 's', 'l'))
318 goto fail;
319
320 ast = s->streams[0]->priv_data;
321 av_freep(&s->streams[0]->codec->extradata);
322 av_freep(&s->streams[0]);
323 s->nb_streams = 0;
a2a6332b 324 if (ENABLE_DV_DEMUXER) {
38ca53da
AJ
325 avi->dv_demux = dv_init_demux(s);
326 if (!avi->dv_demux)
327 goto fail;
a2a6332b 328 }
bb270c08
DB
329 s->streams[0]->priv_data = ast;
330 url_fskip(pb, 3 * 4);
331 ast->scale = get_le32(pb);
332 ast->rate = get_le32(pb);
6eb2de74
RS
333 url_fskip(pb, 4); /* start time */
334
335 dv_dur = get_le32(pb);
336 if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) {
337 dv_dur *= AV_TIME_BASE;
338 s->duration = av_rescale(dv_dur, ast->scale, ast->rate);
339 }
340 /*
341 * else, leave duration alone; timing estimation in utils.c
342 * will make a guess based on bit rate.
343 */
344
bb270c08 345 stream_index = s->nb_streams - 1;
6eb2de74 346 url_fskip(pb, size - 9*4);
b53f1064
MN
347 break;
348 }
b559b29b 349
6d29fba9 350 assert(stream_index < s->nb_streams);
01f4895c 351 st->codec->stream_codec_tag= handler;
b559b29b 352
b53f1064
MN
353 get_le32(pb); /* flags */
354 get_le16(pb); /* priority */
355 get_le16(pb); /* language */
356 get_le32(pb); /* initial frame */
357 ast->scale = get_le32(pb);
358 ast->rate = get_le32(pb);
359 if(ast->scale && ast->rate){
360 }else if(frame_period){
361 ast->rate = 1000000;
362 ast->scale = frame_period;
363 }else{
364 ast->rate = 25;
365 ast->scale = 1;
366 }
367 av_set_pts_info(st, 64, ast->scale, ast->rate);
115329f1 368
b72a2bc8 369 ast->cum_len=get_le32(pb); /* start */
b53f1064 370 nb_frames = get_le32(pb);
b559b29b 371
b53f1064 372 st->start_time = 0;
c0df9d75 373 st->duration = nb_frames;
b53f1064
MN
374 get_le32(pb); /* buffer size */
375 get_le32(pb); /* quality */
376 ast->sample_size = get_le32(pb); /* sample ssize */
2b70eb2b 377 ast->cum_len *= FFMAX(1, ast->sample_size);
b53f1064 378// av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
247eadca 379
b53f1064 380 switch(tag1) {
bb270c08 381 case MKTAG('v', 'i', 'd', 's'):
b53f1064 382 codec_type = CODEC_TYPE_VIDEO;
247eadca 383
b53f1064 384 ast->sample_size = 0;
b53f1064
MN
385 break;
386 case MKTAG('a', 'u', 'd', 's'):
387 codec_type = CODEC_TYPE_AUDIO;
9bf9a5fc 388 break;
cc11e2b3 389 case MKTAG('t', 'x', 't', 's'):
115329f1 390 //FIXME
cc11e2b3 391 codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
cc11e2b3 392 break;
9bf9a5fc 393 default:
30667f42 394 av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
9bf9a5fc 395 goto fail;
de6d9b64 396 }
2b70eb2b 397 ast->frame_offset= ast->cum_len;
b53f1064 398 url_fskip(pb, size - 12 * 4);
de6d9b64
FB
399 break;
400 case MKTAG('s', 't', 'r', 'f'):
401 /* stream header */
6d29fba9 402 if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
de6d9b64
FB
403 url_fskip(pb, size);
404 } else {
405 st = s->streams[stream_index];
406 switch(codec_type) {
407 case CODEC_TYPE_VIDEO:
408 get_le32(pb); /* size */
01f4895c
MN
409 st->codec->width = get_le32(pb);
410 st->codec->height = get_le32(pb);
de6d9b64 411 get_le16(pb); /* panes */
01f4895c 412 st->codec->bits_per_sample= get_le16(pb); /* depth */
de6d9b64 413 tag1 = get_le32(pb);
b559b29b
MN
414 get_le32(pb); /* ImageSize */
415 get_le32(pb); /* XPelsPerMeter */
416 get_le32(pb); /* YPelsPerMeter */
417 get_le32(pb); /* ClrUsed */
418 get_le32(pb); /* ClrImportant */
419
cbb79c0e
RD
420 if (tag1 == MKTAG('D', 'X', 'S', 'B')) {
421 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
422 st->codec->codec_tag = tag1;
423 st->codec->codec_id = CODEC_ID_XSUB;
424 break;
425 }
426
e344c1ea
SH
427 if(size > 10*4 && size<(1<<30)){
428 st->codec->extradata_size= size - 10*4;
429 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
430 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
431 }
115329f1 432
01f4895c 433 if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
952c69c4 434 get_byte(pb);
b559b29b 435
5e29abf8
RT
436 /* Extract palette from extradata if bpp <= 8 */
437 /* This code assumes that extradata contains only palette */
438 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
439 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
440 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 441#ifdef WORDS_BIGENDIAN
01f4895c
MN
442 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
443 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 444#else
01f4895c
MN
445 memcpy(st->codec->palctrl->palette, st->codec->extradata,
446 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 447#endif
01f4895c 448 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
449 }
450
de6d9b64
FB
451#ifdef DEBUG
452 print_tag("video", tag1, 0);
453#endif
01f4895c
MN
454 st->codec->codec_type = CODEC_TYPE_VIDEO;
455 st->codec->codec_tag = tag1;
456 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
57004ff1 457 st->need_parsing = AVSTREAM_PARSE_HEADERS; // this is needed to get the pict type which is needed for generating correct pts
b559b29b 458// url_fskip(pb, size - 5 * 4);
de6d9b64 459 break;
9bf9a5fc 460 case CODEC_TYPE_AUDIO:
01f4895c 461 get_wav_header(pb, st->codec, size);
e84dab5f
MN
462 if(ast->sample_size && st->codec->block_align && ast->sample_size % st->codec->block_align)
463 av_log(s, AV_LOG_DEBUG, "invalid sample size or block align detected\n");
1cef9527
FR
464 if (size%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
465 url_fskip(pb, 1);
5836d158 466 /* Force parsing as several audio frames can be in
a74008a4
JP
467 * one packet and timestamps refer to packet start*/
468 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
cbee7a69
BC
469 /* ADTS header is in extradata, AAC without header must be stored as exact frames, parser not needed and it will fail */
470 if (st->codec->codec_id == CODEC_ID_AAC && st->codec->extradata_size)
57004ff1 471 st->need_parsing = AVSTREAM_PARSE_NONE;
8662900b
DB
472 /* AVI files with Xan DPCM audio (wrongly) declare PCM
473 * audio in the header but have Axan as stream_code_tag. */
474 if (st->codec->stream_codec_tag == ff_get_fourcc("Axan")){
475 st->codec->codec_id = CODEC_ID_XAN_DPCM;
476 st->codec->codec_tag = 0;
477 }
de6d9b64
FB
478 break;
479 default:
01f4895c
MN
480 st->codec->codec_type = CODEC_TYPE_DATA;
481 st->codec->codec_id= CODEC_ID_NONE;
482 st->codec->codec_tag= 0;
de6d9b64
FB
483 url_fskip(pb, size);
484 break;
485 }
486 }
487 break;
94d1d6c0
MN
488 case MKTAG('i', 'n', 'd', 'x'):
489 i= url_ftell(pb);
2c00106c 490 if(!url_is_streamed(pb) && !(s->flags & AVFMT_FLAG_IGNIDX)){
b7b22558 491 read_braindead_odml_indx(s, 0);
b7b22558 492 }
94d1d6c0
MN
493 url_fseek(pb, i+size, SEEK_SET);
494 break;
57060f89
DC
495 case MKTAG('I', 'N', 'A', 'M'):
496 avi_read_tag(pb, s->title, sizeof(s->title), size);
497 break;
498 case MKTAG('I', 'A', 'R', 'T'):
499 avi_read_tag(pb, s->author, sizeof(s->author), size);
500 break;
501 case MKTAG('I', 'C', 'O', 'P'):
502 avi_read_tag(pb, s->copyright, sizeof(s->copyright), size);
503 break;
504 case MKTAG('I', 'C', 'M', 'T'):
505 avi_read_tag(pb, s->comment, sizeof(s->comment), size);
506 break;
507 case MKTAG('I', 'G', 'N', 'R'):
508 avi_read_tag(pb, s->genre, sizeof(s->genre), size);
509 break;
f0861f46
PI
510 case MKTAG('I', 'P', 'R', 'D'):
511 avi_read_tag(pb, s->album, sizeof(s->album), size);
512 break;
2ad4648f
PI
513 case MKTAG('I', 'P', 'R', 'T'):
514 avi_read_tag(pb, str_track, sizeof(str_track), size);
515 sscanf(str_track, "%d", &s->track);
516 break;
de6d9b64 517 default:
755c18ae
MN
518 if(size > 1000000){
519 av_log(s, AV_LOG_ERROR, "well something went wrong during header parsing, "
520 "ill ignore it and try to continue anyway\n");
521 avi->movi_list = url_ftell(pb) - 4;
522 avi->movi_end = url_fsize(pb);
523 goto end_of_header;
524 }
de6d9b64
FB
525 /* skip tag */
526 size += (size & 1);
527 url_fskip(pb, size);
528 break;
529 }
530 }
531 end_of_header:
532 /* check stream number */
533 if (stream_index != s->nb_streams - 1) {
534 fail:
535 for(i=0;i<s->nb_streams;i++) {
01f4895c 536 av_freep(&s->streams[i]->codec->extradata);
9145f8b3 537 av_freep(&s->streams[i]);
de6d9b64
FB
538 }
539 return -1;
540 }
1101abfe 541
b7b22558 542 if(!avi->index_loaded && !url_is_streamed(pb))
94d1d6c0 543 avi_load_index(s);
42feef6b 544 avi->index_loaded = 1;
30a43f2d 545 avi->non_interleaved |= guess_ni_flag(s);
115e8ae5
MN
546 if(avi->non_interleaved)
547 clean_index(s);
115329f1 548
de6d9b64
FB
549 return 0;
550}
551
1101abfe 552static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64
FB
553{
554 AVIContext *avi = s->priv_data;
555 ByteIOContext *pb = &s->pb;
8f9298f8 556 int n, d[8], size;
4a8d5135 557 offset_t i, sync;
7458ccbb 558 void* dstr;
115329f1 559
a2a6332b 560 if (ENABLE_DV_DEMUXER && avi->dv_demux) {
7458ccbb 561 size = dv_get_packet(avi->dv_demux, pkt);
bb270c08
DB
562 if (size >= 0)
563 return size;
2af7e610 564 }
115329f1 565
7c7f3866 566 if(avi->non_interleaved){
79396ac6 567 int best_stream_index = 0;
7c7f3866
MN
568 AVStream *best_st= NULL;
569 AVIStream *best_ast;
570 int64_t best_ts= INT64_MAX;
571 int i;
115329f1 572
7c7f3866
MN
573 for(i=0; i<s->nb_streams; i++){
574 AVStream *st = s->streams[i];
575 AVIStream *ast = st->priv_data;
576 int64_t ts= ast->frame_offset;
577
578 if(ast->sample_size)
579 ts /= ast->sample_size;
580 ts= av_rescale(ts, AV_TIME_BASE * (int64_t)st->time_base.num, st->time_base.den);
581
949b1a13 582// av_log(NULL, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
7c7f3866
MN
583 if(ts < best_ts){
584 best_ts= ts;
585 best_st= st;
586 best_stream_index= i;
587 }
588 }
589 best_ast = best_st->priv_data;
590 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
591 if(best_ast->remaining)
592 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
593 else
594 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
595
596// av_log(NULL, AV_LOG_DEBUG, "%d\n", i);
597 if(i>=0){
598 int64_t pos= best_st->index_entries[i].pos;
5c89153e 599 pos += best_ast->packet_size - best_ast->remaining;
1894edeb 600 url_fseek(&s->pb, pos + 8, SEEK_SET);
949b1a13 601// av_log(NULL, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
115329f1 602
8223bca5
MN
603 assert(best_ast->remaining <= best_ast->packet_size);
604
1894edeb
MN
605 avi->stream_index= best_stream_index;
606 if(!best_ast->remaining)
8223bca5 607 best_ast->packet_size=
1894edeb 608 best_ast->remaining= best_st->index_entries[i].size;
7c7f3866
MN
609 }
610 }
115329f1 611
4a8d5135 612resync:
7c7f3866
MN
613 if(avi->stream_index >= 0){
614 AVStream *st= s->streams[ avi->stream_index ];
615 AVIStream *ast= st->priv_data;
616 int size;
115329f1 617
e84dab5f 618 if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
7c7f3866 619 size= INT_MAX;
115329f1 620 else if(ast->sample_size < 32)
7c7f3866
MN
621 size= 64*ast->sample_size;
622 else
623 size= ast->sample_size;
624
625 if(size > ast->remaining)
626 size= ast->remaining;
2692067a 627 av_get_packet(pb, pkt, size);
115329f1 628
a2a6332b 629 if (ENABLE_DV_DEMUXER && avi->dv_demux) {
7c7f3866
MN
630 dstr = pkt->destruct;
631 size = dv_produce_packet(avi->dv_demux, pkt,
632 pkt->data, pkt->size);
633 pkt->destruct = dstr;
634 pkt->flags |= PKT_FLAG_KEY;
635 } else {
636 /* XXX: how to handle B frames in avi ? */
637 pkt->dts = ast->frame_offset;
638// pkt->dts += ast->start;
639 if(ast->sample_size)
640 pkt->dts /= ast->sample_size;
949b1a13 641//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);
7c7f3866
MN
642 pkt->stream_index = avi->stream_index;
643
01f4895c 644 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
4323b09d
MN
645 AVIndexEntry *e;
646 int index;
ded3c7da 647 assert(st->index_entries);
7c7f3866 648
4323b09d
MN
649 index= av_index_search_timestamp(st, pkt->dts, 0);
650 e= &st->index_entries[index];
115329f1 651
4323b09d
MN
652 if(index >= 0 && e->timestamp == ast->frame_offset){
653 if (e->flags & AVINDEX_KEYFRAME)
654 pkt->flags |= PKT_FLAG_KEY;
655 }
7c7f3866 656 } else {
115329f1 657 pkt->flags |= PKT_FLAG_KEY;
7c7f3866
MN
658 }
659 if(ast->sample_size)
660 ast->frame_offset += pkt->size;
661 else
662 ast->frame_offset++;
663 }
664 ast->remaining -= size;
665 if(!ast->remaining){
666 avi->stream_index= -1;
667 ast->packet_size= 0;
7c7f3866
MN
668 }
669
670 return size;
671 }
672
4a8d5135
MN
673 memset(d, -1, sizeof(int)*8);
674 for(i=sync=url_ftell(pb); !url_feof(pb); i++) {
df99755b 675 int j;
1101abfe 676
df99755b
MN
677 for(j=0; j<7; j++)
678 d[j]= d[j+1];
679 d[7]= get_byte(pb);
115329f1 680
df99755b 681 size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
115329f1 682
df99755b 683 if( d[2] >= '0' && d[2] <= '9'
d2c5f0a4
MN
684 && d[3] >= '0' && d[3] <= '9'){
685 n= (d[2] - '0') * 10 + (d[3] - '0');
686 }else{
687 n= 100; //invalid stream id
df99755b 688 }
949b1a13 689//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);
ea4b2b5e 690 if(i + size > avi->fsize || d[0]<0)
d2c5f0a4 691 continue;
115329f1 692
d2c5f0a4
MN
693 //parse ix##
694 if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams)
bb270c08 695 //parse JUNK
bc3a73bc
MN
696 ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')
697 ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){
8f9298f8 698 url_fskip(pb, size);
d2c5f0a4 699//av_log(NULL, AV_LOG_DEBUG, "SKIP\n");
4a8d5135 700 goto resync;
8f9298f8 701 }
d2c5f0a4 702
df99755b 703 if( d[0] >= '0' && d[0] <= '9'
d2c5f0a4
MN
704 && d[1] >= '0' && d[1] <= '9'){
705 n= (d[0] - '0') * 10 + (d[1] - '0');
706 }else{
707 n= 100; //invalid stream id
708 }
115329f1 709
d2c5f0a4 710 //parse ##dc/##wb
80e3a08c 711 if(n < s->nb_streams){
d2c5f0a4
MN
712 AVStream *st;
713 AVIStream *ast;
714 st = s->streams[n];
715 ast = st->priv_data;
115329f1 716
f3356e9c
MN
717 if( (st->discard >= AVDISCARD_DEFAULT && size==0)
718 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
719 || st->discard >= AVDISCARD_ALL){
720 if(ast->sample_size) ast->frame_offset += pkt->size;
721 else ast->frame_offset++;
b4aea108
MN
722 url_fskip(pb, size);
723 goto resync;
724 }
d2c5f0a4 725
115329f1 726 if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
d2c5f0a4 727 d[2]*256+d[3] == ast->prefix /*||
115329f1 728 (d[2] == 'd' && d[3] == 'c') ||
bb270c08 729 (d[2] == 'w' && d[3] == 'b')*/) {
d2c5f0a4
MN
730
731//av_log(NULL, AV_LOG_DEBUG, "OK\n");
732 if(d[2]*256+d[3] == ast->prefix)
733 ast->prefix_count++;
734 else{
735 ast->prefix= d[2]*256+d[3];
736 ast->prefix_count= 0;
737 }
738
7c7f3866
MN
739 avi->stream_index= n;
740 ast->packet_size= size + 8;
741 ast->remaining= size;
ded3c7da
MN
742
743 {
744 uint64_t pos= url_ftell(pb) - 8;
745 if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){
746 av_add_index_entry(st, pos, ast->frame_offset / FFMAX(1, ast->sample_size), size, 0, AVINDEX_KEYFRAME);
747 }
748 }
7c7f3866 749 goto resync;
d2c5f0a4 750 }
df99755b 751 }
69bde0b2
MM
752 /* palette changed chunk */
753 if ( d[0] >= '0' && d[0] <= '9'
754 && d[1] >= '0' && d[1] <= '9'
755 && ((d[2] == 'p' && d[3] == 'c'))
ea4b2b5e 756 && n < s->nb_streams && i + size <= avi->fsize) {
69bde0b2
MM
757
758 AVStream *st;
759 int first, clr, flags, k, p;
760
761 st = s->streams[n];
762
763 first = get_byte(pb);
764 clr = get_byte(pb);
bb270c08
DB
765 if(!clr) /* all 256 colors used */
766 clr = 256;
69bde0b2
MM
767 flags = get_le16(pb);
768 p = 4;
769 for (k = first; k < clr + first; k++) {
770 int r, g, b;
771 r = get_byte(pb);
772 g = get_byte(pb);
773 b = get_byte(pb);
774 get_byte(pb);
01f4895c 775 st->codec->palctrl->palette[k] = b + (g << 8) + (r << 16);
69bde0b2 776 }
01f4895c 777 st->codec->palctrl->palette_changed = 1;
4a8d5135 778 goto resync;
69bde0b2
MM
779 }
780
df99755b 781 }
d2c5f0a4 782
df99755b 783 return -1;
de6d9b64
FB
784}
785
155e9ee9
FB
786/* XXX: we make the implicit supposition that the position are sorted
787 for each stream */
788static int avi_read_idx1(AVFormatContext *s, int size)
789{
7c7f3866 790 AVIContext *avi = s->priv_data;
155e9ee9
FB
791 ByteIOContext *pb = &s->pb;
792 int nb_index_entries, i;
793 AVStream *st;
794 AVIStream *ast;
155e9ee9 795 unsigned int index, tag, flags, pos, len;
7c7f3866 796 unsigned last_pos= -1;
115329f1 797
155e9ee9
FB
798 nb_index_entries = size / 16;
799 if (nb_index_entries <= 0)
800 return -1;
801
802 /* read the entries and sort them in each stream component */
803 for(i = 0; i < nb_index_entries; i++) {
804 tag = get_le32(pb);
805 flags = get_le32(pb);
806 pos = get_le32(pb);
807 len = get_le32(pb);
52a0bbff 808#if defined(DEBUG_SEEK)
115329f1 809 av_log(NULL, AV_LOG_DEBUG, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
155e9ee9
FB
810 i, tag, flags, pos, len);
811#endif
7c7f3866
MN
812 if(i==0 && pos > avi->movi_list)
813 avi->movi_list= 0; //FIXME better check
5c89153e 814 pos += avi->movi_list;
7c7f3866 815
155e9ee9
FB
816 index = ((tag & 0xff) - '0') * 10;
817 index += ((tag >> 8) & 0xff) - '0';
818 if (index >= s->nb_streams)
819 continue;
820 st = s->streams[index];
821 ast = st->priv_data;
115329f1 822
52a0bbff 823#if defined(DEBUG_SEEK)
949b1a13 824 av_log(NULL, AV_LOG_DEBUG, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
52a0bbff 825#endif
80e3a08c
MN
826 if(last_pos == pos)
827 avi->non_interleaved= 1;
828 else
2b70eb2b 829 av_add_index_entry(st, pos, ast->cum_len / FFMAX(1, ast->sample_size), len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
7c7f3866 830 if(ast->sample_size)
2b70eb2b 831 ast->cum_len += len;
7c7f3866
MN
832 else
833 ast->cum_len ++;
7c7f3866 834 last_pos= pos;
155e9ee9
FB
835 }
836 return 0;
837}
838
7c7f3866 839static int guess_ni_flag(AVFormatContext *s){
7c7f3866
MN
840 int i;
841 int64_t last_start=0;
842 int64_t first_end= INT64_MAX;
115329f1 843
7c7f3866
MN
844 for(i=0; i<s->nb_streams; i++){
845 AVStream *st = s->streams[i];
7c7f3866
MN
846 int n= st->nb_index_entries;
847
848 if(n <= 0)
849 continue;
850
851 if(st->index_entries[0].pos > last_start)
852 last_start= st->index_entries[0].pos;
853 if(st->index_entries[n-1].pos < first_end)
854 first_end= st->index_entries[n-1].pos;
855 }
856 return last_start > first_end;
857}
858
155e9ee9
FB
859static int avi_load_index(AVFormatContext *s)
860{
861 AVIContext *avi = s->priv_data;
862 ByteIOContext *pb = &s->pb;
863 uint32_t tag, size;
e6c0297f 864 offset_t pos= url_ftell(pb);
115329f1 865
155e9ee9
FB
866 url_fseek(pb, avi->movi_end, SEEK_SET);
867#ifdef DEBUG_SEEK
949b1a13 868 printf("movi_end=0x%"PRIx64"\n", avi->movi_end);
155e9ee9
FB
869#endif
870 for(;;) {
871 if (url_feof(pb))
872 break;
873 tag = get_le32(pb);
874 size = get_le32(pb);
875#ifdef DEBUG_SEEK
876 printf("tag=%c%c%c%c size=0x%x\n",
877 tag & 0xff,
878 (tag >> 8) & 0xff,
879 (tag >> 16) & 0xff,
880 (tag >> 24) & 0xff,
881 size);
882#endif
883 switch(tag) {
884 case MKTAG('i', 'd', 'x', '1'):
885 if (avi_read_idx1(s, size) < 0)
886 goto skip;
887 else
888 goto the_end;
889 break;
890 default:
891 skip:
892 size += (size & 1);
893 url_fskip(pb, size);
894 break;
895 }
896 }
897 the_end:
e6c0297f 898 url_fseek(pb, pos, SEEK_SET);
155e9ee9
FB
899 return 0;
900}
901
7b3c1382 902static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
155e9ee9
FB
903{
904 AVIContext *avi = s->priv_data;
905 AVStream *st;
52a0bbff 906 int i, index;
155e9ee9
FB
907 int64_t pos;
908
909 if (!avi->index_loaded) {
910 /* we only load the index on demand */
911 avi_load_index(s);
912 avi->index_loaded = 1;
913 }
52a0bbff 914 assert(stream_index>= 0);
155e9ee9
FB
915
916 st = s->streams[stream_index];
52a0bbff
MN
917 index= av_index_search_timestamp(st, timestamp, flags);
918 if(index<0)
155e9ee9 919 return -1;
115329f1 920
155e9ee9 921 /* find the position */
52a0bbff
MN
922 pos = st->index_entries[index].pos;
923 timestamp = st->index_entries[index].timestamp;
924
949b1a13 925// av_log(NULL, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
155e9ee9 926
6eb2de74
RS
927 if (ENABLE_DV_DEMUXER && avi->dv_demux) {
928 /* One and only one real stream for DV in AVI, and it has video */
929 /* offsets. Calling with other stream indices should have failed */
930 /* the av_index_search_timestamp call above. */
931 assert(stream_index == 0);
932
933 /* Feed the DV video stream version of the timestamp to the */
934 /* DV demux so it can synth correct timestamps */
935 dv_offset_reset(avi->dv_demux, timestamp);
936
937 url_fseek(&s->pb, pos, SEEK_SET);
938 avi->stream_index= -1;
939 return 0;
940 }
941
155e9ee9 942 for(i = 0; i < s->nb_streams; i++) {
52a0bbff
MN
943 AVStream *st2 = s->streams[i];
944 AVIStream *ast2 = st2->priv_data;
7c7f3866
MN
945
946 ast2->packet_size=
947 ast2->remaining= 0;
948
52a0bbff
MN
949 if (st2->nb_index_entries <= 0)
950 continue;
115329f1 951
e84dab5f 952// assert(st2->codec->block_align);
52a0bbff
MN
953 assert(st2->time_base.den == ast2->rate);
954 assert(st2->time_base.num == ast2->scale);
955 index = av_index_search_timestamp(
115329f1 956 st2,
52a0bbff
MN
957 av_rescale(timestamp, st2->time_base.den*(int64_t)st->time_base.num, st->time_base.den * (int64_t)st2->time_base.num),
958 flags | AVSEEK_FLAG_BACKWARD);
959 if(index<0)
960 index=0;
115329f1 961
7c7f3866
MN
962 if(!avi->non_interleaved){
963 while(index>0 && st2->index_entries[index].pos > pos)
964 index--;
965 while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
966 index++;
967 }
968
949b1a13 969// av_log(NULL, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
52a0bbff
MN
970 /* extract the current frame number */
971 ast2->frame_offset = st2->index_entries[index].timestamp;
972 if(ast2->sample_size)
973 ast2->frame_offset *=ast2->sample_size;
155e9ee9 974 }
52a0bbff 975
155e9ee9 976 /* do the seek */
155e9ee9 977 url_fseek(&s->pb, pos, SEEK_SET);
7c7f3866 978 avi->stream_index= -1;
155e9ee9
FB
979 return 0;
980}
981
1101abfe 982static int avi_read_close(AVFormatContext *s)
de6d9b64 983{
5ae2c73e
MN
984 int i;
985 AVIContext *avi = s->priv_data;
5ae2c73e
MN
986
987 for(i=0;i<s->nb_streams;i++) {
988 AVStream *st = s->streams[i];
155e9ee9 989 AVIStream *ast = st->priv_data;
52a0bbff 990 av_free(ast);
01f4895c 991 av_free(st->codec->palctrl);
5ae2c73e
MN
992 }
993
7458ccbb
RS
994 if (avi->dv_demux)
995 av_free(avi->dv_demux);
996
c9a65ca8
FB
997 return 0;
998}
999
1000static int avi_probe(AVProbeData *p)
1001{
1002 /* check file header */
c9a65ca8
FB
1003 if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
1004 p->buf[2] == 'F' && p->buf[3] == 'F' &&
1005 p->buf[8] == 'A' && p->buf[9] == 'V' &&
d09ea618 1006 p->buf[10] == 'I' && (p->buf[11] == ' ' || p->buf[11] == 0x19))
c9a65ca8
FB
1007 return AVPROBE_SCORE_MAX;
1008 else
1009 return 0;
1010}
1011
ff70e601 1012AVInputFormat avi_demuxer = {
c9a65ca8
FB
1013 "avi",
1014 "avi format",
1015 sizeof(AVIContext),
1016 avi_probe,
1017 avi_read_header,
1018 avi_read_packet,
1019 avi_read_close,
155e9ee9 1020 avi_read_seek,
c9a65ca8 1021};