The reader ignores the size of the ASF data object and keeps on
[libav.git] / libavformat / asf.c
CommitLineData
de6d9b64 1/*
542993b0 2 * ASF compatible decoder.
19720f15 3 * Copyright (c) 2000, 2001 Fabrice Bellard.
de6d9b64 4 *
19720f15
FB
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
de6d9b64 9 *
19720f15 10 * This library is distributed in the hope that it will be useful,
de6d9b64 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
FB
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
19720f15
FB
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
5509bffa 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 18 */
de6d9b64 19#include "avformat.h"
9d9f4119 20#include "riff.h"
f80c1ac0 21#include "mpegaudio.h"
542993b0 22#include "asf.h"
de6d9b64 23
580fb5e7
MN
24#undef NDEBUG
25#include <assert.h>
26
615b92fd 27#define FRAME_HEADER_SIZE 17
115329f1 28// Fix Me! FRAME_HEADER_SIZE may be different.
615b92fd 29
de6d9b64
FB
30static const GUID index_guid = {
31 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
32};
33
de6d9b64
FB
34/**********************************/
35/* decoding */
36
37//#define DEBUG
38
39#ifdef DEBUG
5082f759
FR
40#define PRINT_IF_GUID(g,cmp) \
41if (!memcmp(g, &cmp, sizeof(GUID))) \
42 printf("(GUID: %s) ", #cmp)
43
de6d9b64
FB
44static void print_guid(const GUID *g)
45{
46 int i;
5082f759
FR
47 PRINT_IF_GUID(g, asf_header);
48 else PRINT_IF_GUID(g, file_header);
49 else PRINT_IF_GUID(g, stream_header);
50 else PRINT_IF_GUID(g, audio_stream);
51 else PRINT_IF_GUID(g, audio_conceal_none);
52 else PRINT_IF_GUID(g, video_stream);
53 else PRINT_IF_GUID(g, video_conceal_none);
ae38261e 54 else PRINT_IF_GUID(g, command_stream);
5082f759
FR
55 else PRINT_IF_GUID(g, comment_header);
56 else PRINT_IF_GUID(g, codec_comment_header);
57 else PRINT_IF_GUID(g, codec_comment1_header);
58 else PRINT_IF_GUID(g, data_header);
59 else PRINT_IF_GUID(g, index_guid);
60 else PRINT_IF_GUID(g, head1_guid);
61 else PRINT_IF_GUID(g, head2_guid);
62 else PRINT_IF_GUID(g, my_guid);
88141c91
MN
63 else PRINT_IF_GUID(g, ext_stream_header);
64 else PRINT_IF_GUID(g, extended_content_header);
65 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
66 else PRINT_IF_GUID(g, ext_stream_audio_stream);
5082f759
FR
67 else
68 printf("(GUID: unknown) ");
de6d9b64 69 printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
2a10020b 70 for(i=0;i<8;i++)
de6d9b64
FB
71 printf(" 0x%02x,", g->v4[i]);
72 printf("}\n");
73}
6df84c3a 74#undef PRINT_IF_GUID
de6d9b64
FB
75#endif
76
77static void get_guid(ByteIOContext *s, GUID *g)
78{
79 int i;
80
81 g->v1 = get_le32(s);
82 g->v2 = get_le16(s);
83 g->v3 = get_le16(s);
84 for(i=0;i<8;i++)
85 g->v4[i] = get_byte(s);
86}
87
88#if 0
89static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
90{
91 int len, c;
92 char *q;
93
94 len = get_le16(pb);
95 q = buf;
96 while (len > 0) {
97 c = get_le16(pb);
98 if ((q - buf) < buf_size - 1)
99 *q++ = c;
100 len--;
101 }
102 *q = '\0';
103}
104#endif
105
106static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
107{
108 int c;
109 char *q;
110
111 q = buf;
112 while (len > 0) {
113 c = get_le16(pb);
114 if ((q - buf) < buf_size - 1)
115 *q++ = c;
116 len-=2;
117 }
118 *q = '\0';
119}
120
c9a65ca8
FB
121static int asf_probe(AVProbeData *pd)
122{
123 GUID g;
124 const unsigned char *p;
125 int i;
126
127 /* check file header */
128 if (pd->buf_size <= 32)
129 return 0;
130 p = pd->buf;
131 g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
132 p += 4;
133 g.v2 = p[0] | (p[1] << 8);
134 p += 2;
135 g.v3 = p[0] | (p[1] << 8);
136 p += 2;
137 for(i=0;i<8;i++)
138 g.v4[i] = *p++;
139
140 if (!memcmp(&g, &asf_header, sizeof(GUID)))
141 return AVPROBE_SCORE_MAX;
142 else
143 return 0;
144}
145
de6d9b64
FB
146static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
147{
c9a65ca8 148 ASFContext *asf = s->priv_data;
de6d9b64
FB
149 GUID g;
150 ByteIOContext *pb = &s->pb;
151 AVStream *st;
152 ASFStream *asf_st;
e095026a 153 int size, i;
0c1a9eda 154 int64_t gsize;
de6d9b64 155
de6d9b64
FB
156 get_guid(pb, &g);
157 if (memcmp(&g, &asf_header, sizeof(GUID)))
158 goto fail;
159 get_le64(pb);
160 get_le32(pb);
161 get_byte(pb);
162 get_byte(pb);
2141dc37 163 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
de6d9b64
FB
164 for(;;) {
165 get_guid(pb, &g);
166 gsize = get_le64(pb);
167#ifdef DEBUG
168 printf("%08Lx: ", url_ftell(pb) - 24);
169 print_guid(&g);
170 printf(" size=0x%Lx\n", gsize);
171#endif
172 if (gsize < 24)
173 goto fail;
174 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b 175 get_guid(pb, &asf->hdr.guid);
bb270c08
DB
176 asf->hdr.file_size = get_le64(pb);
177 asf->hdr.create_time = get_le64(pb);
178 asf->hdr.packets_count = get_le64(pb);
179 asf->hdr.send_time = get_le64(pb);
180 asf->hdr.play_time = get_le64(pb);
181 asf->hdr.preroll = get_le32(pb);
182 asf->hdr.ignore = get_le32(pb);
183 asf->hdr.flags = get_le32(pb);
184 asf->hdr.min_pktsize = get_le32(pb);
185 asf->hdr.max_pktsize = get_le32(pb);
186 asf->hdr.max_bitrate = get_le32(pb);
187 asf->packet_size = asf->hdr.max_pktsize;
2141dc37 188 asf->nb_packets = asf->hdr.packets_count;
de6d9b64 189 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
0ffd77b9 190 int type, total_size, type_specific_size, sizeX;
de6d9b64 191 unsigned int tag1;
0c1a9eda 192 int64_t pos1, pos2;
88141c91 193 int test_for_ext_stream_audio;
2a10020b 194
de6d9b64
FB
195 pos1 = url_ftell(pb);
196
247eadca 197 st = av_new_stream(s, 0);
de6d9b64
FB
198 if (!st)
199 goto fail;
9ee91c2f 200 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
de6d9b64
FB
201 asf_st = av_mallocz(sizeof(ASFStream));
202 if (!asf_st)
203 goto fail;
204 st->priv_data = asf_st;
c0df9d75 205 st->start_time = asf->hdr.preroll;
115329f1 206 st->duration = asf->hdr.send_time /
c0df9d75 207 (10000000 / 1000) - st->start_time;
de6d9b64 208 get_guid(pb, &g);
88141c91
MN
209
210 test_for_ext_stream_audio = 0;
de6d9b64
FB
211 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
212 type = CODEC_TYPE_AUDIO;
213 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
214 type = CODEC_TYPE_VIDEO;
ae38261e
MB
215 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
216 type = CODEC_TYPE_UNKNOWN;
88141c91
MN
217 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
218 test_for_ext_stream_audio = 1;
219 type = CODEC_TYPE_UNKNOWN;
de6d9b64
FB
220 } else {
221 goto fail;
222 }
223 get_guid(pb, &g);
224 total_size = get_le64(pb);
2e7973bb 225 type_specific_size = get_le32(pb);
de6d9b64 226 get_le32(pb);
bb270c08 227 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 228 // mapping of asf ID to AV stream ID;
247eadca 229 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 230
de6d9b64 231 get_le32(pb);
88141c91
MN
232
233 if (test_for_ext_stream_audio) {
234 get_guid(pb, &g);
235 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
236 type = CODEC_TYPE_AUDIO;
237 get_guid(pb, &g);
238 get_le32(pb);
239 get_le32(pb);
240 get_le32(pb);
241 get_guid(pb, &g);
242 get_le32(pb);
243 }
244 }
245
bb270c08 246 st->codec->codec_type = type;
de6d9b64 247 if (type == CODEC_TYPE_AUDIO) {
01f4895c 248 get_wav_header(pb, st->codec, type_specific_size);
afda223c 249 st->need_parsing = 1;
bb270c08
DB
250 /* We have to init the frame size at some point .... */
251 pos2 = url_ftell(pb);
252 if (gsize > (pos2 + 8 - pos1 + 24)) {
253 asf_st->ds_span = get_byte(pb);
254 asf_st->ds_packet_size = get_le16(pb);
255 asf_st->ds_chunk_size = get_le16(pb);
256 asf_st->ds_data_size = get_le16(pb);
257 asf_st->ds_silence_data = get_byte(pb);
258 }
259 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
260 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
261 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
262 if (asf_st->ds_span > 1) {
263 if (!asf_st->ds_chunk_size
264 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
265 asf_st->ds_span = 0; // disable descrambling
266 }
01f4895c 267 switch (st->codec->codec_id) {
80783dc2 268 case CODEC_ID_MP3:
01f4895c 269 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
270 break;
271 case CODEC_ID_PCM_S16LE:
272 case CODEC_ID_PCM_S16BE:
273 case CODEC_ID_PCM_U16LE:
274 case CODEC_ID_PCM_U16BE:
275 case CODEC_ID_PCM_S8:
276 case CODEC_ID_PCM_U8:
277 case CODEC_ID_PCM_ALAW:
278 case CODEC_ID_PCM_MULAW:
01f4895c 279 st->codec->frame_size = 1;
f80c1ac0
PG
280 break;
281 default:
282 /* This is probably wrong, but it prevents a crash later */
01f4895c 283 st->codec->frame_size = 1;
f80c1ac0
PG
284 break;
285 }
88141c91 286 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 287 get_le32(pb);
de6d9b64
FB
288 get_le32(pb);
289 get_byte(pb);
290 size = get_le16(pb); /* size */
0ffd77b9 291 sizeX= get_le32(pb); /* size */
01f4895c 292 st->codec->width = get_le32(pb);
bb270c08 293 st->codec->height = get_le32(pb);
2a10020b 294 /* not available for asf */
de6d9b64 295 get_le16(pb); /* panes */
bb270c08 296 st->codec->bits_per_sample = get_le16(pb); /* depth */
de6d9b64 297 tag1 = get_le32(pb);
bb270c08 298 url_fskip(pb, 20);
0ffd77b9
MN
299// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
300 size= sizeX;
bb270c08
DB
301 if (size > 40) {
302 st->codec->extradata_size = size - 40;
303 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
304 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
305 }
5e29abf8
RT
306
307 /* Extract palette from extradata if bpp <= 8 */
308 /* This code assumes that extradata contains only palette */
309 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
310 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
311 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 312#ifdef WORDS_BIGENDIAN
01f4895c
MN
313 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
314 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 315#else
01f4895c
MN
316 memcpy(st->codec->palctrl->palette, st->codec->extradata,
317 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 318#endif
01f4895c 319 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
320 }
321
01f4895c 322 st->codec->codec_tag = tag1;
bb270c08 323 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4
MN
324 if(tag1 == MKTAG('D', 'V', 'R', ' '))
325 st->need_parsing = 1;
de6d9b64
FB
326 }
327 pos2 = url_ftell(pb);
328 url_fskip(pb, gsize - (pos2 - pos1 + 24));
329 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
b6eaae39
KED
330 asf->data_object_offset = url_ftell(pb);
331 if (gsize != (uint64_t)-1 && gsize >= 24) {
332 asf->data_object_size = gsize - 24;
333 } else {
334 asf->data_object_size = (uint64_t)-1;
335 }
de6d9b64
FB
336 break;
337 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
338 int len1, len2, len3, len4, len5;
339
340 len1 = get_le16(pb);
341 len2 = get_le16(pb);
342 len3 = get_le16(pb);
343 len4 = get_le16(pb);
344 len5 = get_le16(pb);
345 get_str16_nolen(pb, len1, s->title, sizeof(s->title));
346 get_str16_nolen(pb, len2, s->author, sizeof(s->author));
347 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
348 get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
bb270c08 349 url_fskip(pb, len5);
d13431cd
KK
350 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
351 int desc_count, i;
352
353 desc_count = get_le16(pb);
354 for(i=0;i<desc_count;i++)
355 {
356 int name_len,value_type,value_len,value_num = 0;
357 char *name, *value;
358
359 name_len = get_le16(pb);
360 name = (char *)av_mallocz(name_len);
361 get_str16_nolen(pb, name_len, name, name_len);
362 value_type = get_le16(pb);
363 value_len = get_le16(pb);
364 if ((value_type == 0) || (value_type == 1)) // unicode or byte
365 {
366 value = (char *)av_mallocz(value_len);
367 get_str16_nolen(pb, value_len, value, value_len);
0ecca7a4 368 if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }
d13431cd
KK
369 av_free(value);
370 }
724dc20c 371 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
d13431cd
KK
372 {
373 if (value_type==2) value_num = get_le32(pb);
374 if (value_type==3) value_num = get_le32(pb);
375 if (value_type==4) value_num = get_le64(pb);
376 if (value_type==5) value_num = get_le16(pb);
377 if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
378 if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
379 }
380 av_free(name);
381 }
88141c91
MN
382 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
383 int ext_len, payload_ext_ct, stream_ct;
384 uint32_t ext_d;
1bd86246 385 int64_t pos_ex_st;
88141c91
MN
386 pos_ex_st = url_ftell(pb);
387
388 get_le64(pb);
389 get_le64(pb);
390 get_le32(pb);
391 get_le32(pb);
392 get_le32(pb);
393 get_le32(pb);
394 get_le32(pb);
395 get_le32(pb);
396 get_le32(pb);
397 get_le32(pb);
398 get_le16(pb);
399 get_le16(pb);
400 get_le64(pb);
401 stream_ct = get_le16(pb);
402 payload_ext_ct = get_le16(pb);
403
404 for (i=0; i<stream_ct; i++){
405 get_le16(pb);
406 ext_len = get_le16(pb);
407 url_fseek(pb, ext_len, SEEK_CUR);
408 }
409
410 for (i=0; i<payload_ext_ct; i++){
411 get_guid(pb, &g);
412 ext_d=get_le16(pb);
413 ext_len=get_le32(pb);
414 url_fseek(pb, ext_len, SEEK_CUR);
415 }
416
417 // there could be a optional stream properties object to follow
418 // if so the next iteration will pick it up
de6d9b64
FB
419 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
420 int v1, v2;
421 get_guid(pb, &g);
422 v1 = get_le32(pb);
423 v2 = get_le16(pb);
88141c91 424#if 0
de6d9b64
FB
425 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
426 int len, v1, n, num;
427 char str[256], *q;
428 char tag[16];
429
430 get_guid(pb, &g);
431 print_guid(&g);
2a10020b 432
de6d9b64
FB
433 n = get_le32(pb);
434 for(i=0;i<n;i++) {
435 num = get_le16(pb); /* stream number */
436 get_str16(pb, str, sizeof(str));
437 get_str16(pb, str, sizeof(str));
438 len = get_le16(pb);
439 q = tag;
440 while (len > 0) {
441 v1 = get_byte(pb);
442 if ((q - tag) < sizeof(tag) - 1)
443 *q++ = v1;
444 len--;
445 }
446 *q = '\0';
447 }
448#endif
449 } else if (url_feof(pb)) {
450 goto fail;
451 } else {
452 url_fseek(pb, gsize - 24, SEEK_CUR);
453 }
454 }
455 get_guid(pb, &g);
456 get_le64(pb);
457 get_byte(pb);
458 get_byte(pb);
2141dc37
ZK
459 if (url_feof(pb))
460 goto fail;
461 asf->data_offset = url_ftell(pb);
de6d9b64
FB
462 asf->packet_size_left = 0;
463
464 return 0;
465
466 fail:
4c3dff6d 467 for(i=0;i<s->nb_streams;i++) {
de6d9b64 468 AVStream *st = s->streams[i];
bb270c08
DB
469 if (st) {
470 av_free(st->priv_data);
01f4895c 471 av_free(st->codec->extradata);
bb270c08 472 }
1ea4f593 473 av_free(st);
de6d9b64 474 }
de6d9b64
FB
475 return -1;
476}
477
2a10020b
ZK
478#define DO_2BITS(bits, var, defval) \
479 switch (bits & 3) \
480 { \
481 case 3: var = get_le32(pb); rsize += 4; break; \
482 case 2: var = get_le16(pb); rsize += 2; break; \
483 case 1: var = get_byte(pb); rsize++; break; \
484 default: var = defval; break; \
485 }
486
de6d9b64
FB
487static int asf_get_packet(AVFormatContext *s)
488{
489 ASFContext *asf = s->priv_data;
490 ByteIOContext *pb = &s->pb;
2a10020b 491 uint32_t packet_length, padsize;
29962fea
MN
492 int rsize = 9;
493 int c;
115329f1 494
29962fea 495 assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
115329f1 496
29962fea 497 c = get_byte(pb);
1359c2d4 498 if (c != 0x82) {
5acdd6e6 499 if (!url_feof(pb))
bb270c08 500 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b
ZK
501 }
502 if ((c & 0x0f) == 2) { // always true for now
bb270c08 503 if (get_le16(pb) != 0) {
5acdd6e6 504 if (!url_feof(pb))
bb270c08
DB
505 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
506 return AVERROR_IO;
507 }
29962fea
MN
508 rsize+=2;
509/* }else{
510 if (!url_feof(pb))
bb270c08
DB
511 printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
512 return AVERROR_IO;*/
de6d9b64 513 }
2a10020b
ZK
514
515 asf->packet_flags = get_byte(pb);
516 asf->packet_property = get_byte(pb);
517
518 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
519 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
520 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
521
522 asf->packet_timestamp = get_le32(pb);
de6d9b64 523 get_le16(pb); /* duration */
2141dc37 524 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
525
526 if (asf->packet_flags & 0x01) {
bb270c08 527 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
528 asf->packet_segments = asf->packet_segsizetype & 0x3f;
529 } else {
bb270c08 530 asf->packet_segments = 1;
2a10020b
ZK
531 asf->packet_segsizetype = 0x80;
532 }
533 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
534 if (packet_length < asf->hdr.min_pktsize)
535 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 536 asf->packet_padsize = padsize;
de6d9b64 537#ifdef DEBUG
2a10020b 538 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 539#endif
de6d9b64
FB
540 return 0;
541}
542
543static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
544{
545 ASFContext *asf = s->priv_data;
2a10020b 546 ASFStream *asf_st = 0;
de6d9b64 547 ByteIOContext *pb = &s->pb;
1359c2d4 548 //static int pc = 0;
2a10020b 549 for (;;) {
bb270c08
DB
550 int rsize = 0;
551 if (asf->packet_size_left < FRAME_HEADER_SIZE
552 || asf->packet_segments < 1) {
553 //asf->packet_size_left <= asf->packet_padsize) {
554 int ret = asf->packet_size_left + asf->packet_padsize;
555 //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
47627aec
MN
556 if((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size)
557 ret += asf->packet_size - ((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size);
bb270c08
DB
558 /* fail safe */
559 url_fskip(pb, ret);
82b9e4a2 560 asf->packet_pos= url_ftell(&s->pb);
b6eaae39
KED
561 if (asf->data_object_size != (uint64_t)-1 &&
562 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
563 return AVERROR_IO; /* Do not exceed the size of the data object */
bb270c08
DB
564 ret = asf_get_packet(s);
565 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
566 if (ret < 0 || url_feof(pb))
567 return AVERROR_IO;
2141dc37 568 asf->packet_time_start = 0;
2a10020b 569 continue;
bb270c08
DB
570 }
571 if (asf->packet_time_start == 0) {
572 /* read frame header */
1359c2d4 573 int num = get_byte(pb);
bb270c08
DB
574 asf->packet_segments--;
575 rsize++;
576 asf->packet_key_frame = (num & 0x80) >> 7;
577 asf->stream_index = asf->asfid2avid[num & 0x7f];
578 // sequence should be ignored!
579 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
580 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
581 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
82b9e4a2 582//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
bb270c08 583 if (asf->packet_replic_size > 1) {
1305a9d5 584 assert(asf->packet_replic_size >= 8);
2a10020b 585 // it should be always at least 8 bytes - FIXME validate
bb270c08
DB
586 asf->packet_obj_size = get_le32(pb);
587 asf->packet_frag_timestamp = get_le32(pb); // timestamp
588 if (asf->packet_replic_size > 8)
589 url_fskip(pb, asf->packet_replic_size - 8);
590 rsize += asf->packet_replic_size; // FIXME - check validity
591 } else if (asf->packet_replic_size==1){
592 // multipacket - frag_offset is begining timestamp
593 asf->packet_time_start = asf->packet_frag_offset;
2a10020b 594 asf->packet_frag_offset = 0;
bb270c08 595 asf->packet_frag_timestamp = asf->packet_timestamp;
2141dc37 596
1305a9d5 597 asf->packet_time_delta = get_byte(pb);
bb270c08
DB
598 rsize++;
599 }else{
1305a9d5
MN
600 assert(asf->packet_replic_size==0);
601 }
bb270c08
DB
602 if (asf->packet_flags & 0x01) {
603 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
acbe6cfa 604#undef DO_2BITS
bb270c08
DB
605 //printf("Fragsize %d\n", asf->packet_frag_size);
606 } else {
607 asf->packet_frag_size = asf->packet_size_left - rsize;
608 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
609 }
610 if (asf->packet_replic_size == 1) {
611 asf->packet_multi_size = asf->packet_frag_size;
612 if (asf->packet_multi_size > asf->packet_size_left) {
613 asf->packet_segments = 0;
2141dc37 614 continue;
bb270c08
DB
615 }
616 }
617 asf->packet_size_left -= rsize;
618 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1359c2d4 619
bb270c08 620 if (asf->stream_index < 0
f3356e9c
MN
621 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
622 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
623 ) {
1359c2d4 624 asf->packet_time_start = 0;
bb270c08
DB
625 /* unhandled packet (should not happen) */
626 url_fskip(pb, asf->packet_frag_size);
627 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc
MN
628 if(asf->stream_index < 0)
629 av_log(s, AV_LOG_ERROR, "ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
1359c2d4 630 continue;
bb270c08
DB
631 }
632 asf->asf_st = s->streams[asf->stream_index]->priv_data;
633 }
634 asf_st = asf->asf_st;
635
636 if ((asf->packet_frag_offset != asf_st->frag_offset
637 || (asf->packet_frag_offset
638 && asf->packet_seq != asf_st->seq)) // seq should be ignored
639 ) {
640 /* cannot continue current packet: free it */
641 // FIXME better check if packet was already allocated
642 av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
643 asf_st->pkt.size,
644 asf->packet_obj_size,
645 asf->packet_frag_offset, asf_st->frag_offset,
646 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
647 if (asf_st->pkt.size)
648 av_free_packet(&asf_st->pkt);
649 asf_st->frag_offset = 0;
650 if (asf->packet_frag_offset != 0) {
651 url_fskip(pb, asf->packet_frag_size);
652 av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
653 asf->packet_size_left -= asf->packet_frag_size;
654 continue;
655 }
656 }
657 if (asf->packet_replic_size == 1) {
658 // frag_offset is here used as the begining timestamp
659 asf->packet_frag_timestamp = asf->packet_time_start;
660 asf->packet_time_start += asf->packet_time_delta;
661 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
662 asf->packet_size_left--;
2141dc37 663 asf->packet_multi_size--;
bb270c08
DB
664 if (asf->packet_multi_size < asf->packet_obj_size)
665 {
666 asf->packet_time_start = 0;
667 url_fskip(pb, asf->packet_multi_size);
668 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 669 continue;
bb270c08
DB
670 }
671 asf->packet_multi_size -= asf->packet_obj_size;
672 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
673 }
674 if (asf_st->frag_offset == 0) {
675 /* new packet */
676 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
677 asf_st->seq = asf->packet_seq;
678 asf_st->pkt.pts = asf->packet_frag_timestamp;
679 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
680 asf_st->pkt.pos =
681 asf_st->packet_pos= asf->packet_pos;
682//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 683//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 684//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
685 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
686 asf->packet_key_frame = 1;
687 if (asf->packet_key_frame)
688 asf_st->pkt.flags |= PKT_FLAG_KEY;
689 }
690
691 /* read data */
692 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
693 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
694 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
695 asf->packet_size_left -= asf->packet_frag_size;
696 if (asf->packet_size_left < 0)
2141dc37 697 continue;
bb270c08
DB
698 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
699 asf->packet_frag_size);
700 asf_st->frag_offset += asf->packet_frag_size;
701 /* test if whole packet is read */
702 if (asf_st->frag_offset == asf_st->pkt.size) {
703 /* return packet */
704 if (asf_st->ds_span > 1) {
705 /* packet descrambling */
706 char* newdata = av_malloc(asf_st->pkt.size);
707 if (newdata) {
708 int offset = 0;
709 while (offset < asf_st->pkt.size) {
710 int off = offset / asf_st->ds_chunk_size;
711 int row = off / asf_st->ds_span;
712 int col = off % asf_st->ds_span;
713 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
714 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
715 memcpy(newdata + offset,
716 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
717 asf_st->ds_chunk_size);
718 offset += asf_st->ds_chunk_size;
719 }
720 av_free(asf_st->pkt.data);
721 asf_st->pkt.data = newdata;
722 }
723 }
724 asf_st->frag_offset = 0;
725 memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
726 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
727 asf_st->pkt.size = 0;
728 asf_st->pkt.data = 0;
729 break; // packet completed
730 }
de6d9b64 731 }
de6d9b64
FB
732 return 0;
733}
734
735static int asf_read_close(AVFormatContext *s)
736{
de6d9b64
FB
737 int i;
738
739 for(i=0;i<s->nb_streams;i++) {
bb270c08
DB
740 AVStream *st = s->streams[i];
741 av_free(st->priv_data);
01f4895c 742 av_free(st->codec->palctrl);
de6d9b64 743 }
de6d9b64
FB
744 return 0;
745}
746
38376f00
KK
747// Added to support seeking after packets have been read
748// If information is not reset, read_packet fails due to
749// leftover information from previous reads
750static void asf_reset_header(AVFormatContext *s)
751{
752 ASFContext *asf = s->priv_data;
82b9e4a2
MN
753 ASFStream *asf_st;
754 int i;
38376f00
KK
755
756 asf->packet_nb_frames = 0;
757 asf->packet_timestamp_start = -1;
758 asf->packet_timestamp_end = -1;
759 asf->packet_size_left = 0;
760 asf->packet_segments = 0;
761 asf->packet_flags = 0;
762 asf->packet_property = 0;
763 asf->packet_timestamp = 0;
764 asf->packet_segsizetype = 0;
765 asf->packet_segments = 0;
766 asf->packet_seq = 0;
767 asf->packet_replic_size = 0;
768 asf->packet_key_frame = 0;
769 asf->packet_padsize = 0;
770 asf->packet_frag_offset = 0;
771 asf->packet_frag_size = 0;
772 asf->packet_frag_timestamp = 0;
773 asf->packet_multi_size = 0;
774 asf->packet_obj_size = 0;
775 asf->packet_time_delta = 0;
776 asf->packet_time_start = 0;
115329f1 777
82b9e4a2
MN
778 for(i=0; i<s->nb_streams; i++){
779 asf_st= s->streams[i]->priv_data;
780 av_free_packet(&asf_st->pkt);
781 asf_st->frag_offset=0;
782 asf_st->seq=0;
783 }
784 asf->asf_st= NULL;
38376f00
KK
785}
786
8d14a25c 787static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00
KK
788{
789 ASFContext *asf = s->priv_data;
790 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 791 ASFStream *asf_st;
580fb5e7 792 int64_t pts;
82b9e4a2 793 int64_t pos= *ppos;
3e9245a9
MN
794 int i;
795 int64_t start_pos[s->nb_streams];
115329f1 796
3e9245a9
MN
797 for(i=0; i<s->nb_streams; i++){
798 start_pos[i]= pos;
799 }
115329f1 800
8d14a25c
MN
801 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
802 *ppos= pos;
803 url_fseek(&s->pb, pos, SEEK_SET);
115329f1 804
82b9e4a2 805//printf("asf_read_pts\n");
82b9e4a2 806 asf_reset_header(s);
3e9245a9 807 for(;;){
82b9e4a2 808 if (av_read_frame(s, pkt) < 0){
bc874dae 809 av_log(s, AV_LOG_INFO, "seek failed\n");
bb270c08 810 return AV_NOPTS_VALUE;
82b9e4a2 811 }
115329f1 812
38cf2a72 813 pts= pkt->pts;
580fb5e7
MN
814
815 av_free_packet(pkt);
3e9245a9
MN
816 if(pkt->flags&PKT_FLAG_KEY){
817 i= pkt->stream_index;
818
819 asf_st= s->streams[i]->priv_data;
820
821 assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 822 pos= asf_st->packet_pos;
09646bab 823
30a43f2d 824 av_add_index_entry(s->streams[i], pos, pkt->size, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 825 start_pos[i]= asf_st->packet_pos + 1;
115329f1 826
3e9245a9
MN
827 if(pkt->stream_index == stream_index)
828 break;
829 }
830 }
831
832 *ppos= pos;
82b9e4a2 833//printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
580fb5e7
MN
834
835 return pts;
38376f00
KK
836}
837
3ba1438d 838static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 839{
afda223c 840 ASFContext *asf = s->priv_data;
115329f1 841
a602556e 842 if (asf->packet_size <= 0)
38376f00
KK
843 return -1;
844
3ba1438d 845 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
8d14a25c 846 return -1;
3e9245a9 847
38376f00
KK
848 asf_reset_header(s);
849 return 0;
2a10020b
ZK
850}
851
ff70e601 852AVInputFormat asf_demuxer = {
c9a65ca8
FB
853 "asf",
854 "asf format",
855 sizeof(ASFContext),
856 asf_probe,
857 asf_read_header,
858 asf_read_packet,
859 asf_read_close,
2a10020b 860 asf_read_seek,
8d14a25c 861 asf_read_pts,
c9a65ca8 862};