fix segfault with darkkben.free.fr/corrupted_h264.mp4
[libav.git] / libavformat / asf.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * ASF compatible demuxer
19720f15 3 * Copyright (c) 2000, 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 21#include "avformat.h"
9d9f4119 22#include "riff.h"
f80c1ac0 23#include "mpegaudio.h"
542993b0 24#include "asf.h"
db5c43b4 25#include "common.h"
de6d9b64 26
580fb5e7
MN
27#undef NDEBUG
28#include <assert.h>
29
615b92fd 30#define FRAME_HEADER_SIZE 17
115329f1 31// Fix Me! FRAME_HEADER_SIZE may be different.
615b92fd 32
de6d9b64 33static const GUID index_guid = {
24c14d6d 34 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
de6d9b64
FB
35};
36
de6d9b64
FB
37/**********************************/
38/* decoding */
39
40//#define DEBUG
41
42#ifdef DEBUG
5082f759
FR
43#define PRINT_IF_GUID(g,cmp) \
44if (!memcmp(g, &cmp, sizeof(GUID))) \
45 printf("(GUID: %s) ", #cmp)
46
de6d9b64
FB
47static void print_guid(const GUID *g)
48{
49 int i;
5082f759
FR
50 PRINT_IF_GUID(g, asf_header);
51 else PRINT_IF_GUID(g, file_header);
52 else PRINT_IF_GUID(g, stream_header);
53 else PRINT_IF_GUID(g, audio_stream);
54 else PRINT_IF_GUID(g, audio_conceal_none);
55 else PRINT_IF_GUID(g, video_stream);
56 else PRINT_IF_GUID(g, video_conceal_none);
ae38261e 57 else PRINT_IF_GUID(g, command_stream);
5082f759
FR
58 else PRINT_IF_GUID(g, comment_header);
59 else PRINT_IF_GUID(g, codec_comment_header);
60 else PRINT_IF_GUID(g, codec_comment1_header);
61 else PRINT_IF_GUID(g, data_header);
62 else PRINT_IF_GUID(g, index_guid);
63 else PRINT_IF_GUID(g, head1_guid);
64 else PRINT_IF_GUID(g, head2_guid);
65 else PRINT_IF_GUID(g, my_guid);
88141c91
MN
66 else PRINT_IF_GUID(g, ext_stream_header);
67 else PRINT_IF_GUID(g, extended_content_header);
68 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
69 else PRINT_IF_GUID(g, ext_stream_audio_stream);
5082f759
FR
70 else
71 printf("(GUID: unknown) ");
24c14d6d
MN
72 for(i=0;i<16;i++)
73 printf(" 0x%02x,", (*g)[i]);
de6d9b64
FB
74 printf("}\n");
75}
6df84c3a 76#undef PRINT_IF_GUID
de6d9b64
FB
77#endif
78
79static void get_guid(ByteIOContext *s, GUID *g)
80{
24c14d6d
MN
81 assert(sizeof(*g) == 16);
82 get_buffer(s, g, sizeof(*g));
de6d9b64
FB
83}
84
85#if 0
86static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
87{
88 int len, c;
89 char *q;
90
91 len = get_le16(pb);
92 q = buf;
93 while (len > 0) {
94 c = get_le16(pb);
95 if ((q - buf) < buf_size - 1)
96 *q++ = c;
97 len--;
98 }
99 *q = '\0';
100}
101#endif
102
103static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
104{
db5c43b4
ZM
105 char* q = buf;
106 len /= 2;
107 while (len--) {
108 uint8_t tmp;
109 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
de6d9b64
FB
110 }
111 *q = '\0';
112}
113
c9a65ca8
FB
114static int asf_probe(AVProbeData *pd)
115{
c9a65ca8
FB
116 /* check file header */
117 if (pd->buf_size <= 32)
118 return 0;
c9a65ca8 119
24c14d6d 120 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
c9a65ca8
FB
121 return AVPROBE_SCORE_MAX;
122 else
123 return 0;
124}
125
de6d9b64
FB
126static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
127{
c9a65ca8 128 ASFContext *asf = s->priv_data;
de6d9b64
FB
129 GUID g;
130 ByteIOContext *pb = &s->pb;
131 AVStream *st;
132 ASFStream *asf_st;
e095026a 133 int size, i;
0c1a9eda 134 int64_t gsize;
de6d9b64 135
de6d9b64
FB
136 get_guid(pb, &g);
137 if (memcmp(&g, &asf_header, sizeof(GUID)))
138 goto fail;
139 get_le64(pb);
140 get_le32(pb);
141 get_byte(pb);
142 get_byte(pb);
2141dc37 143 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
de6d9b64
FB
144 for(;;) {
145 get_guid(pb, &g);
146 gsize = get_le64(pb);
147#ifdef DEBUG
949b1a13 148 printf("%08"PRIx64": ", url_ftell(pb) - 24);
de6d9b64 149 print_guid(&g);
949b1a13 150 printf(" size=0x%"PRIx64"\n", gsize);
de6d9b64
FB
151#endif
152 if (gsize < 24)
153 goto fail;
154 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b 155 get_guid(pb, &asf->hdr.guid);
bb270c08
DB
156 asf->hdr.file_size = get_le64(pb);
157 asf->hdr.create_time = get_le64(pb);
6bb2a2df 158 asf->nb_packets = get_le64(pb);
bb270c08
DB
159 asf->hdr.send_time = get_le64(pb);
160 asf->hdr.play_time = get_le64(pb);
161 asf->hdr.preroll = get_le32(pb);
162 asf->hdr.ignore = get_le32(pb);
163 asf->hdr.flags = get_le32(pb);
164 asf->hdr.min_pktsize = get_le32(pb);
165 asf->hdr.max_pktsize = get_le32(pb);
166 asf->hdr.max_bitrate = get_le32(pb);
167 asf->packet_size = asf->hdr.max_pktsize;
de6d9b64 168 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
7ad5455c
MN
169 int type, type_specific_size, sizeX;
170 uint64_t total_size;
de6d9b64 171 unsigned int tag1;
0c1a9eda 172 int64_t pos1, pos2;
88141c91 173 int test_for_ext_stream_audio;
2a10020b 174
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FB
175 pos1 = url_ftell(pb);
176
247eadca 177 st = av_new_stream(s, 0);
de6d9b64
FB
178 if (!st)
179 goto fail;
9ee91c2f 180 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
de6d9b64
FB
181 asf_st = av_mallocz(sizeof(ASFStream));
182 if (!asf_st)
183 goto fail;
184 st->priv_data = asf_st;
c0df9d75 185 st->start_time = asf->hdr.preroll;
73fe1052
RM
186 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
187 st->duration = asf->hdr.send_time /
188 (10000000 / 1000) - st->start_time;
189 }
de6d9b64 190 get_guid(pb, &g);
88141c91
MN
191
192 test_for_ext_stream_audio = 0;
de6d9b64
FB
193 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
194 type = CODEC_TYPE_AUDIO;
195 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
196 type = CODEC_TYPE_VIDEO;
ae38261e
MB
197 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
198 type = CODEC_TYPE_UNKNOWN;
88141c91
MN
199 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
200 test_for_ext_stream_audio = 1;
201 type = CODEC_TYPE_UNKNOWN;
de6d9b64
FB
202 } else {
203 goto fail;
204 }
205 get_guid(pb, &g);
206 total_size = get_le64(pb);
2e7973bb 207 type_specific_size = get_le32(pb);
de6d9b64 208 get_le32(pb);
bb270c08 209 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 210 // mapping of asf ID to AV stream ID;
247eadca 211 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 212
de6d9b64 213 get_le32(pb);
88141c91
MN
214
215 if (test_for_ext_stream_audio) {
216 get_guid(pb, &g);
217 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
218 type = CODEC_TYPE_AUDIO;
219 get_guid(pb, &g);
220 get_le32(pb);
221 get_le32(pb);
222 get_le32(pb);
223 get_guid(pb, &g);
224 get_le32(pb);
225 }
226 }
227
bb270c08 228 st->codec->codec_type = type;
de6d9b64 229 if (type == CODEC_TYPE_AUDIO) {
01f4895c 230 get_wav_header(pb, st->codec, type_specific_size);
afda223c 231 st->need_parsing = 1;
bb270c08
DB
232 /* We have to init the frame size at some point .... */
233 pos2 = url_ftell(pb);
234 if (gsize > (pos2 + 8 - pos1 + 24)) {
235 asf_st->ds_span = get_byte(pb);
236 asf_st->ds_packet_size = get_le16(pb);
237 asf_st->ds_chunk_size = get_le16(pb);
6bb2a2df
MN
238 get_le16(pb); //ds_data_size
239 get_byte(pb); //ds_silence_data
bb270c08
DB
240 }
241 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
242 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
243 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
244 if (asf_st->ds_span > 1) {
245 if (!asf_st->ds_chunk_size
05219463
MN
246 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
247 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
bb270c08
DB
248 asf_st->ds_span = 0; // disable descrambling
249 }
01f4895c 250 switch (st->codec->codec_id) {
80783dc2 251 case CODEC_ID_MP3:
01f4895c 252 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
253 break;
254 case CODEC_ID_PCM_S16LE:
255 case CODEC_ID_PCM_S16BE:
256 case CODEC_ID_PCM_U16LE:
257 case CODEC_ID_PCM_U16BE:
258 case CODEC_ID_PCM_S8:
259 case CODEC_ID_PCM_U8:
260 case CODEC_ID_PCM_ALAW:
261 case CODEC_ID_PCM_MULAW:
01f4895c 262 st->codec->frame_size = 1;
f80c1ac0
PG
263 break;
264 default:
265 /* This is probably wrong, but it prevents a crash later */
01f4895c 266 st->codec->frame_size = 1;
f80c1ac0
PG
267 break;
268 }
88141c91 269 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 270 get_le32(pb);
de6d9b64
FB
271 get_le32(pb);
272 get_byte(pb);
273 size = get_le16(pb); /* size */
0ffd77b9 274 sizeX= get_le32(pb); /* size */
01f4895c 275 st->codec->width = get_le32(pb);
bb270c08 276 st->codec->height = get_le32(pb);
2a10020b 277 /* not available for asf */
de6d9b64 278 get_le16(pb); /* panes */
bb270c08 279 st->codec->bits_per_sample = get_le16(pb); /* depth */
de6d9b64 280 tag1 = get_le32(pb);
bb270c08 281 url_fskip(pb, 20);
0ffd77b9
MN
282// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
283 size= sizeX;
bb270c08
DB
284 if (size > 40) {
285 st->codec->extradata_size = size - 40;
286 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
287 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
288 }
5e29abf8
RT
289
290 /* Extract palette from extradata if bpp <= 8 */
291 /* This code assumes that extradata contains only palette */
292 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
293 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
294 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 295#ifdef WORDS_BIGENDIAN
01f4895c
MN
296 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
297 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 298#else
01f4895c
MN
299 memcpy(st->codec->palctrl->palette, st->codec->extradata,
300 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 301#endif
01f4895c 302 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
303 }
304
01f4895c 305 st->codec->codec_tag = tag1;
bb270c08 306 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4
MN
307 if(tag1 == MKTAG('D', 'V', 'R', ' '))
308 st->need_parsing = 1;
de6d9b64
FB
309 }
310 pos2 = url_ftell(pb);
311 url_fskip(pb, gsize - (pos2 - pos1 + 24));
312 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
b6eaae39 313 asf->data_object_offset = url_ftell(pb);
73fe1052
RM
314 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
315 if (!(asf->hdr.flags & 0x01) && gsize != (uint64_t)-1 && gsize >= 24) {
b6eaae39
KED
316 asf->data_object_size = gsize - 24;
317 } else {
318 asf->data_object_size = (uint64_t)-1;
319 }
de6d9b64
FB
320 break;
321 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
322 int len1, len2, len3, len4, len5;
323
324 len1 = get_le16(pb);
325 len2 = get_le16(pb);
326 len3 = get_le16(pb);
327 len4 = get_le16(pb);
328 len5 = get_le16(pb);
4e15cc8b
MN
329 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
330 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
de6d9b64 331 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
4e15cc8b 332 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
bb270c08 333 url_fskip(pb, len5);
d13431cd
KK
334 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
335 int desc_count, i;
336
337 desc_count = get_le16(pb);
338 for(i=0;i<desc_count;i++)
339 {
052aa2ad
SH
340 int name_len,value_type,value_len;
341 uint64_t value_num = 0;
d045b8c1 342 char name[1024];
d13431cd
KK
343
344 name_len = get_le16(pb);
d045b8c1 345 get_str16_nolen(pb, name_len, name, sizeof(name));
d13431cd
KK
346 value_type = get_le16(pb);
347 value_len = get_le16(pb);
348 if ((value_type == 0) || (value_type == 1)) // unicode or byte
349 {
5e2a4855
MN
350 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
351 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
352 else url_fskip(pb, value_len);
d13431cd 353 }
724dc20c 354 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
d13431cd
KK
355 {
356 if (value_type==2) value_num = get_le32(pb);
357 if (value_type==3) value_num = get_le32(pb);
358 if (value_type==4) value_num = get_le64(pb);
359 if (value_type==5) value_num = get_le16(pb);
4e15cc8b
MN
360 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
361 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
d13431cd 362 }
d13431cd 363 }
88141c91
MN
364 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
365 int ext_len, payload_ext_ct, stream_ct;
366 uint32_t ext_d;
1bd86246 367 int64_t pos_ex_st;
88141c91
MN
368 pos_ex_st = url_ftell(pb);
369
370 get_le64(pb);
371 get_le64(pb);
372 get_le32(pb);
373 get_le32(pb);
374 get_le32(pb);
375 get_le32(pb);
376 get_le32(pb);
377 get_le32(pb);
378 get_le32(pb);
379 get_le32(pb);
380 get_le16(pb);
381 get_le16(pb);
382 get_le64(pb);
383 stream_ct = get_le16(pb);
384 payload_ext_ct = get_le16(pb);
385
386 for (i=0; i<stream_ct; i++){
387 get_le16(pb);
388 ext_len = get_le16(pb);
389 url_fseek(pb, ext_len, SEEK_CUR);
390 }
391
392 for (i=0; i<payload_ext_ct; i++){
393 get_guid(pb, &g);
394 ext_d=get_le16(pb);
395 ext_len=get_le32(pb);
396 url_fseek(pb, ext_len, SEEK_CUR);
397 }
398
399 // there could be a optional stream properties object to follow
400 // if so the next iteration will pick it up
de6d9b64
FB
401 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
402 int v1, v2;
403 get_guid(pb, &g);
404 v1 = get_le32(pb);
405 v2 = get_le16(pb);
88141c91 406#if 0
de6d9b64
FB
407 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
408 int len, v1, n, num;
409 char str[256], *q;
410 char tag[16];
411
412 get_guid(pb, &g);
413 print_guid(&g);
2a10020b 414
de6d9b64
FB
415 n = get_le32(pb);
416 for(i=0;i<n;i++) {
417 num = get_le16(pb); /* stream number */
418 get_str16(pb, str, sizeof(str));
419 get_str16(pb, str, sizeof(str));
420 len = get_le16(pb);
421 q = tag;
422 while (len > 0) {
423 v1 = get_byte(pb);
424 if ((q - tag) < sizeof(tag) - 1)
425 *q++ = v1;
426 len--;
427 }
428 *q = '\0';
429 }
430#endif
431 } else if (url_feof(pb)) {
432 goto fail;
433 } else {
434 url_fseek(pb, gsize - 24, SEEK_CUR);
435 }
436 }
437 get_guid(pb, &g);
438 get_le64(pb);
439 get_byte(pb);
440 get_byte(pb);
2141dc37
ZK
441 if (url_feof(pb))
442 goto fail;
443 asf->data_offset = url_ftell(pb);
de6d9b64
FB
444 asf->packet_size_left = 0;
445
446 return 0;
447
448 fail:
4c3dff6d 449 for(i=0;i<s->nb_streams;i++) {
de6d9b64 450 AVStream *st = s->streams[i];
bb270c08
DB
451 if (st) {
452 av_free(st->priv_data);
01f4895c 453 av_free(st->codec->extradata);
bb270c08 454 }
1ea4f593 455 av_free(st);
de6d9b64 456 }
de6d9b64
FB
457 return -1;
458}
459
2a10020b
ZK
460#define DO_2BITS(bits, var, defval) \
461 switch (bits & 3) \
462 { \
463 case 3: var = get_le32(pb); rsize += 4; break; \
464 case 2: var = get_le16(pb); rsize += 2; break; \
465 case 1: var = get_byte(pb); rsize++; break; \
466 default: var = defval; break; \
467 }
468
f7835507
MN
469/**
470 *
471 * @return <0 in case of an error
472 */
de6d9b64
FB
473static int asf_get_packet(AVFormatContext *s)
474{
475 ASFContext *asf = s->priv_data;
476 ByteIOContext *pb = &s->pb;
2a10020b 477 uint32_t packet_length, padsize;
29962fea
MN
478 int rsize = 9;
479 int c;
115329f1 480
29962fea 481 c = get_byte(pb);
1359c2d4 482 if (c != 0x82) {
5acdd6e6 483 if (!url_feof(pb))
bb270c08 484 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b
ZK
485 }
486 if ((c & 0x0f) == 2) { // always true for now
bb270c08 487 if (get_le16(pb) != 0) {
5acdd6e6 488 if (!url_feof(pb))
bb270c08 489 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 490 return -1;
bb270c08 491 }
29962fea
MN
492 rsize+=2;
493/* }else{
494 if (!url_feof(pb))
949b1a13 495 printf("ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
bb270c08 496 return AVERROR_IO;*/
de6d9b64 497 }
2a10020b
ZK
498
499 asf->packet_flags = get_byte(pb);
500 asf->packet_property = get_byte(pb);
501
502 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
503 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
504 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
505
5b11e081
MN
506 //the following checks prevent overflows and infinite loops
507 if(packet_length >= (1U<<29)){
508 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 509 return -1;
5b11e081 510 }
92216453 511 if(padsize >= packet_length){
5b11e081 512 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 513 return -1;
5b11e081
MN
514 }
515
2a10020b 516 asf->packet_timestamp = get_le32(pb);
de6d9b64 517 get_le16(pb); /* duration */
2141dc37 518 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
519
520 if (asf->packet_flags & 0x01) {
bb270c08 521 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
522 asf->packet_segments = asf->packet_segsizetype & 0x3f;
523 } else {
bb270c08 524 asf->packet_segments = 1;
2a10020b
ZK
525 asf->packet_segsizetype = 0x80;
526 }
527 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
528 if (packet_length < asf->hdr.min_pktsize)
529 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 530 asf->packet_padsize = padsize;
de6d9b64 531#ifdef DEBUG
2a10020b 532 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 533#endif
de6d9b64
FB
534 return 0;
535}
536
ae60a857
MN
537/**
538 *
539 * @return <0 if error
540 */
541static int asf_read_frame_header(AVFormatContext *s){
542 ASFContext *asf = s->priv_data;
543 ByteIOContext *pb = &s->pb;
544 int rsize = 1;
545 int num = get_byte(pb);
546
547 asf->packet_segments--;
548 asf->packet_key_frame = num >> 7;
549 asf->stream_index = asf->asfid2avid[num & 0x7f];
550 // sequence should be ignored!
551 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
552 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
553 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
554//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);
555 if (asf->packet_replic_size >= 8) {
556 asf->packet_obj_size = get_le32(pb);
557 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
558 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
559 return -1;
560 }
561 asf->packet_frag_timestamp = get_le32(pb); // timestamp
562 url_fskip(pb, asf->packet_replic_size - 8);
563 rsize += asf->packet_replic_size; // FIXME - check validity
564 } else if (asf->packet_replic_size==1){
565 // multipacket - frag_offset is begining timestamp
566 asf->packet_time_start = asf->packet_frag_offset;
567 asf->packet_frag_offset = 0;
568 asf->packet_frag_timestamp = asf->packet_timestamp;
569
570 asf->packet_time_delta = get_byte(pb);
571 rsize++;
572 }else if(asf->packet_replic_size!=0){
573 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
574 return -1;
575 }
576 if (asf->packet_flags & 0x01) {
577 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
578 if(asf->packet_frag_size > asf->packet_size_left - rsize){
579 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
580 return -1;
581 }
ae60a857
MN
582 //printf("Fragsize %d\n", asf->packet_frag_size);
583 } else {
584 asf->packet_frag_size = asf->packet_size_left - rsize;
585 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
586 }
587 if (asf->packet_replic_size == 1) {
588 asf->packet_multi_size = asf->packet_frag_size;
589 if (asf->packet_multi_size > asf->packet_size_left)
590 return -1;
591 }
592 asf->packet_size_left -= rsize;
593 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
594
595 return 0;
596}
597
de6d9b64
FB
598static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
599{
600 ASFContext *asf = s->priv_data;
2a10020b 601 ASFStream *asf_st = 0;
de6d9b64 602 ByteIOContext *pb = &s->pb;
1359c2d4 603 //static int pc = 0;
2a10020b 604 for (;;) {
ceba96cb
MN
605 if(url_feof(pb))
606 return AVERROR_IO;
bb270c08
DB
607 if (asf->packet_size_left < FRAME_HEADER_SIZE
608 || asf->packet_segments < 1) {
609 //asf->packet_size_left <= asf->packet_padsize) {
610 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 611 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 612 assert(ret>=0);
bb270c08
DB
613 /* fail safe */
614 url_fskip(pb, ret);
b04d5d31
MN
615
616 ret= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size;
617 if(asf->hdr.max_pktsize == asf->hdr.min_pktsize && ret){
618 av_log(s, AV_LOG_ERROR, "packet end missaligned skiping %d\n", ret);
619 url_fskip(pb, asf->packet_size - ret);
620 }
621
82b9e4a2 622 asf->packet_pos= url_ftell(&s->pb);
b6eaae39
KED
623 if (asf->data_object_size != (uint64_t)-1 &&
624 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
625 return AVERROR_IO; /* Do not exceed the size of the data object */
bb270c08
DB
626 ret = asf_get_packet(s);
627 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
ceba96cb
MN
628 if (ret < 0)
629 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
2141dc37 630 asf->packet_time_start = 0;
2a10020b 631 continue;
bb270c08
DB
632 }
633 if (asf->packet_time_start == 0) {
ae60a857
MN
634 if(asf_read_frame_header(s) < 0){
635 asf->packet_segments= 0;
236116cb 636 continue;
1305a9d5 637 }
bb270c08 638 if (asf->stream_index < 0
f3356e9c
MN
639 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
640 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
641 ) {
1359c2d4 642 asf->packet_time_start = 0;
bb270c08
DB
643 /* unhandled packet (should not happen) */
644 url_fskip(pb, asf->packet_frag_size);
645 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 646 if(asf->stream_index < 0)
ae60a857 647 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 648 continue;
bb270c08
DB
649 }
650 asf->asf_st = s->streams[asf->stream_index]->priv_data;
651 }
652 asf_st = asf->asf_st;
653
bb270c08
DB
654 if (asf->packet_replic_size == 1) {
655 // frag_offset is here used as the begining timestamp
656 asf->packet_frag_timestamp = asf->packet_time_start;
657 asf->packet_time_start += asf->packet_time_delta;
658 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
659 asf->packet_size_left--;
2141dc37 660 asf->packet_multi_size--;
bb270c08
DB
661 if (asf->packet_multi_size < asf->packet_obj_size)
662 {
663 asf->packet_time_start = 0;
664 url_fskip(pb, asf->packet_multi_size);
665 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 666 continue;
bb270c08
DB
667 }
668 asf->packet_multi_size -= asf->packet_obj_size;
669 //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);
670 }
200026aa
MN
671 if (asf_st->pkt.size != asf->packet_obj_size) { //FIXME is this condition sufficient?
672 if(asf_st->pkt.data){
673 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
674 asf_st->frag_offset = 0;
675 av_free_packet(&asf_st->pkt);
676 }
bb270c08
DB
677 /* new packet */
678 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
679 asf_st->seq = asf->packet_seq;
680 asf_st->pkt.pts = asf->packet_frag_timestamp;
681 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
682 asf_st->pkt.pos =
683 asf_st->packet_pos= asf->packet_pos;
684//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 685//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 686//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
687 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
688 asf->packet_key_frame = 1;
689 if (asf->packet_key_frame)
690 asf_st->pkt.flags |= PKT_FLAG_KEY;
691 }
692
693 /* read data */
694 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
695 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
696 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
697 asf->packet_size_left -= asf->packet_frag_size;
698 if (asf->packet_size_left < 0)
2141dc37 699 continue;
4c71d727
MN
700
701 if( asf->packet_frag_offset >= asf_st->pkt.size
702 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
703 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
704 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
705 continue;
706 }
707
bb270c08
DB
708 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
709 asf->packet_frag_size);
710 asf_st->frag_offset += asf->packet_frag_size;
711 /* test if whole packet is read */
712 if (asf_st->frag_offset == asf_st->pkt.size) {
713 /* return packet */
714 if (asf_st->ds_span > 1) {
05219463
MN
715 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
716 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
717 }else{
bb270c08 718 /* packet descrambling */
191e8ca7 719 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
720 if (newdata) {
721 int offset = 0;
722 while (offset < asf_st->pkt.size) {
723 int off = offset / asf_st->ds_chunk_size;
724 int row = off / asf_st->ds_span;
725 int col = off % asf_st->ds_span;
726 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
727 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
728
729 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
730 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
731 memcpy(newdata + offset,
732 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
733 asf_st->ds_chunk_size);
734 offset += asf_st->ds_chunk_size;
735 }
736 av_free(asf_st->pkt.data);
737 asf_st->pkt.data = newdata;
738 }
05219463 739 }
bb270c08
DB
740 }
741 asf_st->frag_offset = 0;
b83e83b9 742 *pkt= asf_st->pkt;
bb270c08
DB
743 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
744 asf_st->pkt.size = 0;
745 asf_st->pkt.data = 0;
746 break; // packet completed
747 }
de6d9b64 748 }
de6d9b64
FB
749 return 0;
750}
751
752static int asf_read_close(AVFormatContext *s)
753{
de6d9b64
FB
754 int i;
755
756 for(i=0;i<s->nb_streams;i++) {
bb270c08
DB
757 AVStream *st = s->streams[i];
758 av_free(st->priv_data);
1ae7518d 759 av_free(st->codec->palctrl);
de6d9b64 760 }
de6d9b64
FB
761 return 0;
762}
763
38376f00
KK
764// Added to support seeking after packets have been read
765// If information is not reset, read_packet fails due to
766// leftover information from previous reads
767static void asf_reset_header(AVFormatContext *s)
768{
769 ASFContext *asf = s->priv_data;
82b9e4a2
MN
770 ASFStream *asf_st;
771 int i;
38376f00
KK
772
773 asf->packet_nb_frames = 0;
38376f00
KK
774 asf->packet_size_left = 0;
775 asf->packet_segments = 0;
776 asf->packet_flags = 0;
777 asf->packet_property = 0;
778 asf->packet_timestamp = 0;
779 asf->packet_segsizetype = 0;
780 asf->packet_segments = 0;
781 asf->packet_seq = 0;
782 asf->packet_replic_size = 0;
783 asf->packet_key_frame = 0;
784 asf->packet_padsize = 0;
785 asf->packet_frag_offset = 0;
786 asf->packet_frag_size = 0;
787 asf->packet_frag_timestamp = 0;
788 asf->packet_multi_size = 0;
789 asf->packet_obj_size = 0;
790 asf->packet_time_delta = 0;
791 asf->packet_time_start = 0;
115329f1 792
82b9e4a2
MN
793 for(i=0; i<s->nb_streams; i++){
794 asf_st= s->streams[i]->priv_data;
795 av_free_packet(&asf_st->pkt);
796 asf_st->frag_offset=0;
797 asf_st->seq=0;
798 }
799 asf->asf_st= NULL;
38376f00
KK
800}
801
8d14a25c 802static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00
KK
803{
804 ASFContext *asf = s->priv_data;
805 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 806 ASFStream *asf_st;
580fb5e7 807 int64_t pts;
82b9e4a2 808 int64_t pos= *ppos;
3e9245a9
MN
809 int i;
810 int64_t start_pos[s->nb_streams];
115329f1 811
3e9245a9
MN
812 for(i=0; i<s->nb_streams; i++){
813 start_pos[i]= pos;
814 }
115329f1 815
8d14a25c
MN
816 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
817 *ppos= pos;
818 url_fseek(&s->pb, pos, SEEK_SET);
115329f1 819
82b9e4a2 820//printf("asf_read_pts\n");
82b9e4a2 821 asf_reset_header(s);
3e9245a9 822 for(;;){
82b9e4a2 823 if (av_read_frame(s, pkt) < 0){
0b93103a 824 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 825 return AV_NOPTS_VALUE;
82b9e4a2 826 }
115329f1 827
38cf2a72 828 pts= pkt->pts;
580fb5e7
MN
829
830 av_free_packet(pkt);
3e9245a9
MN
831 if(pkt->flags&PKT_FLAG_KEY){
832 i= pkt->stream_index;
833
834 asf_st= s->streams[i]->priv_data;
835
836 assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 837 pos= asf_st->packet_pos;
09646bab 838
52e54612 839 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 840 start_pos[i]= asf_st->packet_pos + 1;
115329f1 841
3e9245a9
MN
842 if(pkt->stream_index == stream_index)
843 break;
844 }
845 }
846
847 *ppos= pos;
949b1a13 848//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
580fb5e7
MN
849
850 return pts;
38376f00
KK
851}
852
56c96a22
MN
853static void asf_build_simple_index(AVFormatContext *s, int stream_index)
854{
855 GUID g;
856 ASFContext *asf = s->priv_data;
857 int64_t gsize, itime;
858 int64_t pos, current_pos, index_pts;
859 int i;
860 int pct,ict;
861
862 current_pos = url_ftell(&s->pb);
863
864 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
865 get_guid(&s->pb, &g);
866 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
867 gsize = get_le64(&s->pb);
868 get_guid(&s->pb, &g);
869 itime=get_le64(&s->pb);
870 pct=get_le32(&s->pb);
871 ict=get_le32(&s->pb);
ccd3228e 872 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
56c96a22
MN
873
874 for (i=0;i<ict;i++){
875 int pktnum=get_le32(&s->pb);
876 int pktct =get_le16(&s->pb);
877 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
878
879 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
880 index_pts=av_rescale(itime, i, 10000);
881
882 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
883 }
52e54612 884 asf->index_read= 1;
56c96a22
MN
885 }
886 url_fseek(&s->pb, current_pos, SEEK_SET);
887}
888
3ba1438d 889static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 890{
afda223c 891 ASFContext *asf = s->priv_data;
56c96a22
MN
892 AVStream *st = s->streams[stream_index];
893 int64_t pos;
894 int index;
115329f1 895
a602556e 896 if (asf->packet_size <= 0)
38376f00
KK
897 return -1;
898
52e54612 899 if (!asf->index_read)
56c96a22
MN
900 asf_build_simple_index(s, stream_index);
901
52e54612 902 if(!(asf->index_read && st->index_entries)){
56c96a22
MN
903 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
904 return -1;
905 }else{
906 index= av_index_search_timestamp(st, pts, flags);
907 if(index<0)
908 return -1;
909
910 /* find the position */
911 pos = st->index_entries[index].pos;
912 pts = st->index_entries[index].timestamp;
913
914 // various attempts to find key frame have failed so far
915 // asf_reset_header(s);
916 // url_fseek(&s->pb, pos, SEEK_SET);
917 // key_pos = pos;
918 // for(i=0;i<16;i++){
919 // pos = url_ftell(&s->pb);
920 // if (av_read_frame(s, &pkt) < 0){
921 // av_log(s, AV_LOG_INFO, "seek failed\n");
922 // return -1;
923 // }
924 // asf_st = s->streams[stream_index]->priv_data;
925 // pos += st->parser->frame_offset;
926 //
927 // if (pkt.size > b) {
928 // b = pkt.size;
929 // key_pos = pos;
930 // }
931 //
932 // av_free_packet(&pkt);
933 // }
934
935 /* do the seek */
ccd3228e 936 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
56c96a22
MN
937 url_fseek(&s->pb, pos, SEEK_SET);
938 }
38376f00
KK
939 asf_reset_header(s);
940 return 0;
2a10020b
ZK
941}
942
ff70e601 943AVInputFormat asf_demuxer = {
c9a65ca8
FB
944 "asf",
945 "asf format",
946 sizeof(ASFContext),
947 asf_probe,
948 asf_read_header,
949 asf_read_packet,
950 asf_read_close,
2a10020b 951 asf_read_seek,
8d14a25c 952 asf_read_pts,
c9a65ca8 953};