more correct packet alignment check and correction
[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
de6d9b64
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
de6d9b64
FB
469static int asf_get_packet(AVFormatContext *s)
470{
471 ASFContext *asf = s->priv_data;
472 ByteIOContext *pb = &s->pb;
2a10020b 473 uint32_t packet_length, padsize;
29962fea
MN
474 int rsize = 9;
475 int c;
115329f1 476
29962fea 477 c = get_byte(pb);
1359c2d4 478 if (c != 0x82) {
5acdd6e6 479 if (!url_feof(pb))
bb270c08 480 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b
ZK
481 }
482 if ((c & 0x0f) == 2) { // always true for now
bb270c08 483 if (get_le16(pb) != 0) {
5acdd6e6 484 if (!url_feof(pb))
bb270c08
DB
485 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
486 return AVERROR_IO;
487 }
29962fea
MN
488 rsize+=2;
489/* }else{
490 if (!url_feof(pb))
949b1a13 491 printf("ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
bb270c08 492 return AVERROR_IO;*/
de6d9b64 493 }
2a10020b
ZK
494
495 asf->packet_flags = get_byte(pb);
496 asf->packet_property = get_byte(pb);
497
498 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
499 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
500 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
501
5b11e081
MN
502 //the following checks prevent overflows and infinite loops
503 if(packet_length >= (1U<<29)){
504 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
505 return 0; // FIXME this should be -1
506 }
507 if(padsize >= (1U<<29)){
508 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
509 return 0; // FIXME this should be -1
510 }
511
2a10020b 512 asf->packet_timestamp = get_le32(pb);
de6d9b64 513 get_le16(pb); /* duration */
2141dc37 514 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
515
516 if (asf->packet_flags & 0x01) {
bb270c08 517 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
518 asf->packet_segments = asf->packet_segsizetype & 0x3f;
519 } else {
bb270c08 520 asf->packet_segments = 1;
2a10020b
ZK
521 asf->packet_segsizetype = 0x80;
522 }
523 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
524 if (packet_length < asf->hdr.min_pktsize)
525 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 526 asf->packet_padsize = padsize;
de6d9b64 527#ifdef DEBUG
2a10020b 528 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 529#endif
de6d9b64
FB
530 return 0;
531}
532
533static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
534{
535 ASFContext *asf = s->priv_data;
2a10020b 536 ASFStream *asf_st = 0;
de6d9b64 537 ByteIOContext *pb = &s->pb;
1359c2d4 538 //static int pc = 0;
2a10020b 539 for (;;) {
bb270c08
DB
540 int rsize = 0;
541 if (asf->packet_size_left < FRAME_HEADER_SIZE
542 || asf->packet_segments < 1) {
543 //asf->packet_size_left <= asf->packet_padsize) {
544 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 545 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 546 assert(ret>=0);
bb270c08
DB
547 /* fail safe */
548 url_fskip(pb, ret);
b04d5d31
MN
549
550 ret= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size;
551 if(asf->hdr.max_pktsize == asf->hdr.min_pktsize && ret){
552 av_log(s, AV_LOG_ERROR, "packet end missaligned skiping %d\n", ret);
553 url_fskip(pb, asf->packet_size - ret);
554 }
555
82b9e4a2 556 asf->packet_pos= url_ftell(&s->pb);
b6eaae39
KED
557 if (asf->data_object_size != (uint64_t)-1 &&
558 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
559 return AVERROR_IO; /* Do not exceed the size of the data object */
bb270c08
DB
560 ret = asf_get_packet(s);
561 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
562 if (ret < 0 || url_feof(pb))
563 return AVERROR_IO;
2141dc37 564 asf->packet_time_start = 0;
2a10020b 565 continue;
bb270c08
DB
566 }
567 if (asf->packet_time_start == 0) {
568 /* read frame header */
1359c2d4 569 int num = get_byte(pb);
bb270c08
DB
570 asf->packet_segments--;
571 rsize++;
b586d9ea 572 asf->packet_key_frame = num >> 7;
bb270c08
DB
573 asf->stream_index = asf->asfid2avid[num & 0x7f];
574 // sequence should be ignored!
575 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
576 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
577 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
82b9e4a2 578//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);
236116cb 579 if (asf->packet_replic_size >= 8) {
bb270c08 580 asf->packet_obj_size = get_le32(pb);
b086d4ff
MN
581 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
582 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
583 continue;
584 }
bb270c08 585 asf->packet_frag_timestamp = get_le32(pb); // timestamp
236116cb 586 url_fskip(pb, asf->packet_replic_size - 8);
bb270c08
DB
587 rsize += asf->packet_replic_size; // FIXME - check validity
588 } else if (asf->packet_replic_size==1){
589 // multipacket - frag_offset is begining timestamp
590 asf->packet_time_start = asf->packet_frag_offset;
2a10020b 591 asf->packet_frag_offset = 0;
bb270c08 592 asf->packet_frag_timestamp = asf->packet_timestamp;
2141dc37 593
1305a9d5 594 asf->packet_time_delta = get_byte(pb);
bb270c08 595 rsize++;
236116cb
MN
596 }else if(asf->packet_replic_size!=0){
597 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
598 continue;
1305a9d5 599 }
bb270c08
DB
600 if (asf->packet_flags & 0x01) {
601 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
acbe6cfa 602#undef DO_2BITS
bb270c08
DB
603 //printf("Fragsize %d\n", asf->packet_frag_size);
604 } else {
605 asf->packet_frag_size = asf->packet_size_left - rsize;
606 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
607 }
608 if (asf->packet_replic_size == 1) {
609 asf->packet_multi_size = asf->packet_frag_size;
610 if (asf->packet_multi_size > asf->packet_size_left) {
611 asf->packet_segments = 0;
2141dc37 612 continue;
bb270c08
DB
613 }
614 }
615 asf->packet_size_left -= rsize;
616 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1359c2d4 617
bb270c08 618 if (asf->stream_index < 0
f3356e9c
MN
619 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
620 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
621 ) {
1359c2d4 622 asf->packet_time_start = 0;
bb270c08
DB
623 /* unhandled packet (should not happen) */
624 url_fskip(pb, asf->packet_frag_size);
625 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc
MN
626 if(asf->stream_index < 0)
627 av_log(s, AV_LOG_ERROR, "ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
1359c2d4 628 continue;
bb270c08
DB
629 }
630 asf->asf_st = s->streams[asf->stream_index]->priv_data;
631 }
632 asf_st = asf->asf_st;
633
634 if ((asf->packet_frag_offset != asf_st->frag_offset
635 || (asf->packet_frag_offset
636 && asf->packet_seq != asf_st->seq)) // seq should be ignored
637 ) {
638 /* cannot continue current packet: free it */
639 // FIXME better check if packet was already allocated
640 av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
641 asf_st->pkt.size,
642 asf->packet_obj_size,
643 asf->packet_frag_offset, asf_st->frag_offset,
644 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
645 if (asf_st->pkt.size)
646 av_free_packet(&asf_st->pkt);
647 asf_st->frag_offset = 0;
648 if (asf->packet_frag_offset != 0) {
649 url_fskip(pb, asf->packet_frag_size);
650 av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
651 asf->packet_size_left -= asf->packet_frag_size;
652 continue;
653 }
654 }
655 if (asf->packet_replic_size == 1) {
656 // frag_offset is here used as the begining timestamp
657 asf->packet_frag_timestamp = asf->packet_time_start;
658 asf->packet_time_start += asf->packet_time_delta;
659 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
660 asf->packet_size_left--;
2141dc37 661 asf->packet_multi_size--;
bb270c08
DB
662 if (asf->packet_multi_size < asf->packet_obj_size)
663 {
664 asf->packet_time_start = 0;
665 url_fskip(pb, asf->packet_multi_size);
666 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 667 continue;
bb270c08
DB
668 }
669 asf->packet_multi_size -= asf->packet_obj_size;
670 //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);
671 }
672 if (asf_st->frag_offset == 0) {
673 /* new packet */
674 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
675 asf_st->seq = asf->packet_seq;
676 asf_st->pkt.pts = asf->packet_frag_timestamp;
677 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
678 asf_st->pkt.pos =
679 asf_st->packet_pos= asf->packet_pos;
680//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 681//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 682//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
683 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
684 asf->packet_key_frame = 1;
685 if (asf->packet_key_frame)
686 asf_st->pkt.flags |= PKT_FLAG_KEY;
687 }
688
689 /* read data */
690 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
691 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
692 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
693 asf->packet_size_left -= asf->packet_frag_size;
694 if (asf->packet_size_left < 0)
2141dc37 695 continue;
bb270c08
DB
696 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
697 asf->packet_frag_size);
698 asf_st->frag_offset += asf->packet_frag_size;
699 /* test if whole packet is read */
700 if (asf_st->frag_offset == asf_st->pkt.size) {
701 /* return packet */
702 if (asf_st->ds_span > 1) {
05219463
MN
703 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
704 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
705 }else{
bb270c08 706 /* packet descrambling */
191e8ca7 707 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
708 if (newdata) {
709 int offset = 0;
710 while (offset < asf_st->pkt.size) {
711 int off = offset / asf_st->ds_chunk_size;
712 int row = off / asf_st->ds_span;
713 int col = off % asf_st->ds_span;
714 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
715 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
716
717 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
718 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
719 memcpy(newdata + offset,
720 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
721 asf_st->ds_chunk_size);
722 offset += asf_st->ds_chunk_size;
723 }
724 av_free(asf_st->pkt.data);
725 asf_st->pkt.data = newdata;
726 }
05219463 727 }
bb270c08
DB
728 }
729 asf_st->frag_offset = 0;
b83e83b9 730 *pkt= asf_st->pkt;
bb270c08
DB
731 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
732 asf_st->pkt.size = 0;
733 asf_st->pkt.data = 0;
734 break; // packet completed
735 }
de6d9b64 736 }
de6d9b64
FB
737 return 0;
738}
739
740static int asf_read_close(AVFormatContext *s)
741{
de6d9b64
FB
742 int i;
743
744 for(i=0;i<s->nb_streams;i++) {
bb270c08
DB
745 AVStream *st = s->streams[i];
746 av_free(st->priv_data);
01f4895c 747 av_free(st->codec->palctrl);
de6d9b64 748 }
de6d9b64
FB
749 return 0;
750}
751
38376f00
KK
752// Added to support seeking after packets have been read
753// If information is not reset, read_packet fails due to
754// leftover information from previous reads
755static void asf_reset_header(AVFormatContext *s)
756{
757 ASFContext *asf = s->priv_data;
82b9e4a2
MN
758 ASFStream *asf_st;
759 int i;
38376f00
KK
760
761 asf->packet_nb_frames = 0;
38376f00
KK
762 asf->packet_size_left = 0;
763 asf->packet_segments = 0;
764 asf->packet_flags = 0;
765 asf->packet_property = 0;
766 asf->packet_timestamp = 0;
767 asf->packet_segsizetype = 0;
768 asf->packet_segments = 0;
769 asf->packet_seq = 0;
770 asf->packet_replic_size = 0;
771 asf->packet_key_frame = 0;
772 asf->packet_padsize = 0;
773 asf->packet_frag_offset = 0;
774 asf->packet_frag_size = 0;
775 asf->packet_frag_timestamp = 0;
776 asf->packet_multi_size = 0;
777 asf->packet_obj_size = 0;
778 asf->packet_time_delta = 0;
779 asf->packet_time_start = 0;
115329f1 780
82b9e4a2
MN
781 for(i=0; i<s->nb_streams; i++){
782 asf_st= s->streams[i]->priv_data;
783 av_free_packet(&asf_st->pkt);
784 asf_st->frag_offset=0;
785 asf_st->seq=0;
786 }
787 asf->asf_st= NULL;
38376f00
KK
788}
789
8d14a25c 790static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00
KK
791{
792 ASFContext *asf = s->priv_data;
793 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 794 ASFStream *asf_st;
580fb5e7 795 int64_t pts;
82b9e4a2 796 int64_t pos= *ppos;
3e9245a9
MN
797 int i;
798 int64_t start_pos[s->nb_streams];
115329f1 799
3e9245a9
MN
800 for(i=0; i<s->nb_streams; i++){
801 start_pos[i]= pos;
802 }
115329f1 803
8d14a25c
MN
804 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
805 *ppos= pos;
806 url_fseek(&s->pb, pos, SEEK_SET);
115329f1 807
82b9e4a2 808//printf("asf_read_pts\n");
82b9e4a2 809 asf_reset_header(s);
3e9245a9 810 for(;;){
82b9e4a2 811 if (av_read_frame(s, pkt) < 0){
bc874dae 812 av_log(s, AV_LOG_INFO, "seek failed\n");
bb270c08 813 return AV_NOPTS_VALUE;
82b9e4a2 814 }
115329f1 815
38cf2a72 816 pts= pkt->pts;
580fb5e7
MN
817
818 av_free_packet(pkt);
3e9245a9
MN
819 if(pkt->flags&PKT_FLAG_KEY){
820 i= pkt->stream_index;
821
822 asf_st= s->streams[i]->priv_data;
823
824 assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 825 pos= asf_st->packet_pos;
09646bab 826
52e54612 827 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 828 start_pos[i]= asf_st->packet_pos + 1;
115329f1 829
3e9245a9
MN
830 if(pkt->stream_index == stream_index)
831 break;
832 }
833 }
834
835 *ppos= pos;
949b1a13 836//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
580fb5e7
MN
837
838 return pts;
38376f00
KK
839}
840
56c96a22
MN
841static void asf_build_simple_index(AVFormatContext *s, int stream_index)
842{
843 GUID g;
844 ASFContext *asf = s->priv_data;
845 int64_t gsize, itime;
846 int64_t pos, current_pos, index_pts;
847 int i;
848 int pct,ict;
849
850 current_pos = url_ftell(&s->pb);
851
852 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
853 get_guid(&s->pb, &g);
854 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
855 gsize = get_le64(&s->pb);
856 get_guid(&s->pb, &g);
857 itime=get_le64(&s->pb);
858 pct=get_le32(&s->pb);
859 ict=get_le32(&s->pb);
ccd3228e 860 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
56c96a22
MN
861
862 for (i=0;i<ict;i++){
863 int pktnum=get_le32(&s->pb);
864 int pktct =get_le16(&s->pb);
865 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
866
867 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
868 index_pts=av_rescale(itime, i, 10000);
869
870 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
871 }
52e54612 872 asf->index_read= 1;
56c96a22
MN
873 }
874 url_fseek(&s->pb, current_pos, SEEK_SET);
875}
876
3ba1438d 877static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 878{
afda223c 879 ASFContext *asf = s->priv_data;
56c96a22
MN
880 AVStream *st = s->streams[stream_index];
881 int64_t pos;
882 int index;
115329f1 883
a602556e 884 if (asf->packet_size <= 0)
38376f00
KK
885 return -1;
886
52e54612 887 if (!asf->index_read)
56c96a22
MN
888 asf_build_simple_index(s, stream_index);
889
52e54612 890 if(!(asf->index_read && st->index_entries)){
56c96a22
MN
891 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
892 return -1;
893 }else{
894 index= av_index_search_timestamp(st, pts, flags);
895 if(index<0)
896 return -1;
897
898 /* find the position */
899 pos = st->index_entries[index].pos;
900 pts = st->index_entries[index].timestamp;
901
902 // various attempts to find key frame have failed so far
903 // asf_reset_header(s);
904 // url_fseek(&s->pb, pos, SEEK_SET);
905 // key_pos = pos;
906 // for(i=0;i<16;i++){
907 // pos = url_ftell(&s->pb);
908 // if (av_read_frame(s, &pkt) < 0){
909 // av_log(s, AV_LOG_INFO, "seek failed\n");
910 // return -1;
911 // }
912 // asf_st = s->streams[stream_index]->priv_data;
913 // pos += st->parser->frame_offset;
914 //
915 // if (pkt.size > b) {
916 // b = pkt.size;
917 // key_pos = pos;
918 // }
919 //
920 // av_free_packet(&pkt);
921 // }
922
923 /* do the seek */
ccd3228e 924 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
56c96a22
MN
925 url_fseek(&s->pb, pos, SEEK_SET);
926 }
38376f00
KK
927 asf_reset_header(s);
928 return 0;
2a10020b
ZK
929}
930
ff70e601 931AVInputFormat asf_demuxer = {
c9a65ca8
FB
932 "asf",
933 "asf format",
934 sizeof(ASFContext),
935 asf_probe,
936 asf_read_header,
937 asf_read_packet,
938 asf_read_close,
2a10020b 939 asf_read_seek,
8d14a25c 940 asf_read_pts,
c9a65ca8 941};