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10l: typing mistake in r18888
[FFMpeg-mirror/lagarith.git] / libavformat / asfdec.c
blob3810663c2f895b1e4f76c8b045e9b332d959699a
1 /*
2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/common.h"
23 #include "libavutil/avstring.h"
24 #include "libavcodec/mpegaudio.h"
25 #include "avformat.h"
26 #include "riff.h"
27 #include "asf.h"
28 #include "asfcrypt.h"
29 #include "avlanguage.h"
30
31 void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
32
33 #undef NDEBUG
34 #include <assert.h>
35
36 #define FRAME_HEADER_SIZE 17
37 // Fix Me! FRAME_HEADER_SIZE may be different.
38
39 static const ff_asf_guid index_guid = {
40 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
41 };
42
43 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
44 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
45 };
46 /**********************************/
47 /* decoding */
48
49 //#define DEBUG
50
51 #ifdef DEBUG
52 #define PRINT_IF_GUID(g,cmp) \
53 if (!guidcmp(g, &cmp)) \
54 dprintf(NULL, "(GUID: %s) ", #cmp)
55
56 static void print_guid(const ff_asf_guid *g)
57 {
58 int i;
59 PRINT_IF_GUID(g, ff_asf_header);
60 else PRINT_IF_GUID(g, ff_asf_file_header);
61 else PRINT_IF_GUID(g, ff_asf_stream_header);
62 else PRINT_IF_GUID(g, ff_asf_audio_stream);
63 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
64 else PRINT_IF_GUID(g, ff_asf_video_stream);
65 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
66 else PRINT_IF_GUID(g, ff_asf_command_stream);
67 else PRINT_IF_GUID(g, ff_asf_comment_header);
68 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
69 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
70 else PRINT_IF_GUID(g, ff_asf_data_header);
71 else PRINT_IF_GUID(g, index_guid);
72 else PRINT_IF_GUID(g, ff_asf_head1_guid);
73 else PRINT_IF_GUID(g, ff_asf_head2_guid);
74 else PRINT_IF_GUID(g, ff_asf_my_guid);
75 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
76 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
77 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
78 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
79 else PRINT_IF_GUID(g, ff_asf_metadata_header);
80 else PRINT_IF_GUID(g, stream_bitrate_guid);
81 else PRINT_IF_GUID(g, ff_asf_language_guid);
82 else
83 dprintf(NULL, "(GUID: unknown) ");
84 for(i=0;i<16;i++)
85 dprintf(NULL, " 0x%02x,", (*g)[i]);
86 dprintf(NULL, "}\n");
87 }
88 #undef PRINT_IF_GUID
89 #else
90 #define print_guid(g)
91 #endif
92
93 static int guidcmp(const void *g1, const void *g2)
94 {
95 return memcmp(g1, g2, sizeof(ff_asf_guid));
96 }
97
98 static void get_guid(ByteIOContext *s, ff_asf_guid *g)
99 {
100 assert(sizeof(*g) == 16);
101 get_buffer(s, *g, sizeof(*g));
102 }
103
104 #if 0
105 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
106 {
107 int len, c;
108 char *q;
109
110 len = get_le16(pb);
111 q = buf;
112 while (len > 0) {
113 c = get_le16(pb);
114 if ((q - buf) < buf_size - 1)
115 *q++ = c;
116 len--;
117 }
118 *q = '\0';
119 }
120 #endif
121
122 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
123 {
124 char* q = buf;
125 len /= 2;
126 while (len--) {
127 uint8_t tmp;
128 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
129 }
130 *q = '\0';
131 }
132
133 static int asf_probe(AVProbeData *pd)
134 {
135 /* check file header */
136 if (!guidcmp(pd->buf, &ff_asf_header))
137 return AVPROBE_SCORE_MAX;
138 else
139 return 0;
140 }
141
142 static int get_value(ByteIOContext *pb, int type){
143 switch(type){
144 case 2: return get_le32(pb);
145 case 3: return get_le32(pb);
146 case 4: return get_le64(pb);
147 case 5: return get_le16(pb);
148 default:return INT_MIN;
149 }
150 }
151
152 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
153 {
154 char value[1024];
155 if (type <= 1) { // unicode or byte
156 get_str16_nolen(s->pb, len, value, sizeof(value));
157 } else if (type <= 5) { // boolean or DWORD or QWORD or WORD
158 uint64_t num = get_value(s->pb, type);
159 snprintf(value, sizeof(value), "%"PRIu64, num);
160 } else {
161 url_fskip(s->pb, len);
162 return;
163 }
164 if (!strncmp(key, "WM/", 3))
165 key += 3;
166 av_metadata_set(&s->metadata, key, value);
167 }
168
169 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
170 {
171 ASFContext *asf = s->priv_data;
172 ff_asf_guid g;
173 ByteIOContext *pb = s->pb;
174 AVStream *st;
175 ASFStream *asf_st;
176 int size, i;
177 int64_t gsize;
178 AVRational dar[128];
179 uint32_t bitrate[128];
180
181 memset(dar, 0, sizeof(dar));
182 memset(bitrate, 0, sizeof(bitrate));
183
184 get_guid(pb, &g);
185 if (guidcmp(&g, &ff_asf_header))
186 return -1;
187 get_le64(pb);
188 get_le32(pb);
189 get_byte(pb);
190 get_byte(pb);
191 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
192 for(;;) {
193 get_guid(pb, &g);
194 gsize = get_le64(pb);
195 dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
196 print_guid(&g);
197 dprintf(s, " size=0x%"PRIx64"\n", gsize);
198 if (!guidcmp(&g, &ff_asf_data_header)) {
199 asf->data_object_offset = url_ftell(pb);
200 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
201 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
202 asf->data_object_size = gsize - 24;
203 } else {
204 asf->data_object_size = (uint64_t)-1;
205 }
206 break;
207 }
208 if (gsize < 24)
209 return -1;
210 if (!guidcmp(&g, &ff_asf_file_header)) {
211 get_guid(pb, &asf->hdr.guid);
212 asf->hdr.file_size = get_le64(pb);
213 asf->hdr.create_time = get_le64(pb);
214 asf->nb_packets = get_le64(pb);
215 asf->hdr.play_time = get_le64(pb);
216 asf->hdr.send_time = get_le64(pb);
217 asf->hdr.preroll = get_le32(pb);
218 asf->hdr.ignore = get_le32(pb);
219 asf->hdr.flags = get_le32(pb);
220 asf->hdr.min_pktsize = get_le32(pb);
221 asf->hdr.max_pktsize = get_le32(pb);
222 asf->hdr.max_bitrate = get_le32(pb);
223 asf->packet_size = asf->hdr.max_pktsize;
224 } else if (!guidcmp(&g, &ff_asf_stream_header)) {
225 enum CodecType type;
226 int type_specific_size, sizeX;
227 uint64_t total_size;
228 unsigned int tag1;
229 int64_t pos1, pos2, start_time;
230 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
231
232 pos1 = url_ftell(pb);
233
234 st = av_new_stream(s, 0);
235 if (!st)
236 return AVERROR(ENOMEM);
237 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
238 asf_st = av_mallocz(sizeof(ASFStream));
239 if (!asf_st)
240 return AVERROR(ENOMEM);
241 st->priv_data = asf_st;
242 start_time = asf->hdr.preroll;
243
244 asf_st->stream_language_index = 128; // invalid stream index means no language info
245
246 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
247 st->duration = asf->hdr.send_time /
248 (10000000 / 1000) - start_time;
249 }
250 get_guid(pb, &g);
251
252 test_for_ext_stream_audio = 0;
253 if (!guidcmp(&g, &ff_asf_audio_stream)) {
254 type = CODEC_TYPE_AUDIO;
255 } else if (!guidcmp(&g, &ff_asf_video_stream)) {
256 type = CODEC_TYPE_VIDEO;
257 } else if (!guidcmp(&g, &ff_asf_command_stream)) {
258 type = CODEC_TYPE_DATA;
259 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
260 test_for_ext_stream_audio = 1;
261 type = CODEC_TYPE_UNKNOWN;
262 } else {
263 return -1;
264 }
265 get_guid(pb, &g);
266 total_size = get_le64(pb);
267 type_specific_size = get_le32(pb);
268 get_le32(pb);
269 st->id = get_le16(pb) & 0x7f; /* stream id */
270 // mapping of asf ID to AV stream ID;
271 asf->asfid2avid[st->id] = s->nb_streams - 1;
272
273 get_le32(pb);
274
275 if (test_for_ext_stream_audio) {
276 get_guid(pb, &g);
277 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
278 type = CODEC_TYPE_AUDIO;
279 is_dvr_ms_audio=1;
280 get_guid(pb, &g);
281 get_le32(pb);
282 get_le32(pb);
283 get_le32(pb);
284 get_guid(pb, &g);
285 get_le32(pb);
286 }
287 }
288
289 st->codec->codec_type = type;
290 if (type == CODEC_TYPE_AUDIO) {
291 get_wav_header(pb, st->codec, type_specific_size);
292 if (is_dvr_ms_audio) {
293 // codec_id and codec_tag are unreliable in dvr_ms
294 // files. Set them later by probing stream.
295 st->codec->codec_id = CODEC_ID_PROBE;
296 st->codec->codec_tag = 0;
297 }
298 if (st->codec->codec_id == CODEC_ID_AAC) {
299 st->need_parsing = AVSTREAM_PARSE_NONE;
300 } else {
301 st->need_parsing = AVSTREAM_PARSE_FULL;
302 }
303 /* We have to init the frame size at some point .... */
304 pos2 = url_ftell(pb);
305 if (gsize >= (pos2 + 8 - pos1 + 24)) {
306 asf_st->ds_span = get_byte(pb);
307 asf_st->ds_packet_size = get_le16(pb);
308 asf_st->ds_chunk_size = get_le16(pb);
309 get_le16(pb); //ds_data_size
310 get_byte(pb); //ds_silence_data
311 }
312 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
313 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
314 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
315 if (asf_st->ds_span > 1) {
316 if (!asf_st->ds_chunk_size
317 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
318 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
319 asf_st->ds_span = 0; // disable descrambling
320 }
321 switch (st->codec->codec_id) {
322 case CODEC_ID_MP3:
323 st->codec->frame_size = MPA_FRAME_SIZE;
324 break;
325 case CODEC_ID_PCM_S16LE:
326 case CODEC_ID_PCM_S16BE:
327 case CODEC_ID_PCM_U16LE:
328 case CODEC_ID_PCM_U16BE:
329 case CODEC_ID_PCM_S8:
330 case CODEC_ID_PCM_U8:
331 case CODEC_ID_PCM_ALAW:
332 case CODEC_ID_PCM_MULAW:
333 st->codec->frame_size = 1;
334 break;
335 default:
336 /* This is probably wrong, but it prevents a crash later */
337 st->codec->frame_size = 1;
338 break;
339 }
340 } else if (type == CODEC_TYPE_VIDEO) {
341 get_le32(pb);
342 get_le32(pb);
343 get_byte(pb);
344 size = get_le16(pb); /* size */
345 sizeX= get_le32(pb); /* size */
346 st->codec->width = get_le32(pb);
347 st->codec->height = get_le32(pb);
348 /* not available for asf */
349 get_le16(pb); /* panes */
350 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
351 tag1 = get_le32(pb);
352 url_fskip(pb, 20);
353 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
354 size= sizeX;
355 if (size > 40) {
356 st->codec->extradata_size = size - 40;
357 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
358 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
359 }
360
361 /* Extract palette from extradata if bpp <= 8 */
362 /* This code assumes that extradata contains only palette */
363 /* This is true for all paletted codecs implemented in ffmpeg */
364 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
365 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
366 #ifdef WORDS_BIGENDIAN
367 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
368 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
369 #else
370 memcpy(st->codec->palctrl->palette, st->codec->extradata,
371 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
372 #endif
373 st->codec->palctrl->palette_changed = 1;
374 }
375
376 st->codec->codec_tag = tag1;
377 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
378 if(tag1 == MKTAG('D', 'V', 'R', ' '))
379 st->need_parsing = AVSTREAM_PARSE_FULL;
380 }
381 pos2 = url_ftell(pb);
382 url_fskip(pb, gsize - (pos2 - pos1 + 24));
383 } else if (!guidcmp(&g, &ff_asf_comment_header)) {
384 int len1, len2, len3, len4, len5;
385
386 len1 = get_le16(pb);
387 len2 = get_le16(pb);
388 len3 = get_le16(pb);
389 len4 = get_le16(pb);
390 len5 = get_le16(pb);
391 get_tag(s, "title" , 0, len1);
392 get_tag(s, "author" , 0, len2);
393 get_tag(s, "copyright", 0, len3);
394 get_tag(s, "comment" , 0, len4);
395 url_fskip(pb, len5);
396 } else if (!guidcmp(&g, &stream_bitrate_guid)) {
397 int stream_count = get_le16(pb);
398 int j;
399
400 // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
401 // av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
402 for(j = 0; j < stream_count; j++) {
403 int flags, bitrate, stream_id;
404
405 flags= get_le16(pb);
406 bitrate= get_le32(pb);
407 stream_id= (flags & 0x7f);
408 // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
409 asf->stream_bitrates[stream_id]= bitrate;
410 }
411 } else if (!guidcmp(&g, &ff_asf_language_guid)) {
412 int j;
413 int stream_count = get_le16(pb);
414 for(j = 0; j < stream_count; j++) {
415 char lang[6];
416 unsigned int lang_len = get_byte(pb);
417 get_str16_nolen(pb, lang_len, lang, sizeof(lang));
418 if (j < 128)
419 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
420 }
421 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
422 int desc_count, i;
423
424 desc_count = get_le16(pb);
425 for(i=0;i<desc_count;i++) {
426 int name_len,value_type,value_len;
427 char name[1024];
428
429 name_len = get_le16(pb);
430 get_str16_nolen(pb, name_len, name, sizeof(name));
431 value_type = get_le16(pb);
432 value_len = get_le16(pb);
433 get_tag(s, name, value_type, value_len);
434 }
435 } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
436 int n, stream_num, name_len, value_len, value_type, value_num;
437 n = get_le16(pb);
438
439 for(i=0;i<n;i++) {
440 char name[1024];
441
442 get_le16(pb); //lang_list_index
443 stream_num= get_le16(pb);
444 name_len= get_le16(pb);
445 value_type= get_le16(pb);
446 value_len= get_le32(pb);
447
448 get_str16_nolen(pb, name_len, name, sizeof(name));
449 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
450 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
451 url_fskip(pb, value_len - 2);
452
453 if(stream_num<128){
454 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
455 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
456 }
457 }
458 } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
459 int ext_len, payload_ext_ct, stream_ct;
460 uint32_t ext_d, leak_rate, stream_num;
461 unsigned int stream_languageid_index;
462
463 get_le64(pb); // starttime
464 get_le64(pb); // endtime
465 leak_rate = get_le32(pb); // leak-datarate
466 get_le32(pb); // bucket-datasize
467 get_le32(pb); // init-bucket-fullness
468 get_le32(pb); // alt-leak-datarate
469 get_le32(pb); // alt-bucket-datasize
470 get_le32(pb); // alt-init-bucket-fullness
471 get_le32(pb); // max-object-size
472 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
473 stream_num = get_le16(pb); // stream-num
474
475 stream_languageid_index = get_le16(pb); // stream-language-id-index
476 if (stream_num < 128)
477 asf->streams[stream_num].stream_language_index = stream_languageid_index;
478
479 get_le64(pb); // avg frametime in 100ns units
480 stream_ct = get_le16(pb); //stream-name-count
481 payload_ext_ct = get_le16(pb); //payload-extension-system-count
482
483 if (stream_num < 128)
484 bitrate[stream_num] = leak_rate;
485
486 for (i=0; i<stream_ct; i++){
487 get_le16(pb);
488 ext_len = get_le16(pb);
489 url_fseek(pb, ext_len, SEEK_CUR);
490 }
491
492 for (i=0; i<payload_ext_ct; i++){
493 get_guid(pb, &g);
494 ext_d=get_le16(pb);
495 ext_len=get_le32(pb);
496 url_fseek(pb, ext_len, SEEK_CUR);
497 }
498
499 // there could be a optional stream properties object to follow
500 // if so the next iteration will pick it up
501 } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
502 int v1, v2;
503 get_guid(pb, &g);
504 v1 = get_le32(pb);
505 v2 = get_le16(pb);
506 #if 0
507 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
508 int len, v1, n, num;
509 char str[256], *q;
510 char tag[16];
511
512 get_guid(pb, &g);
513 print_guid(&g);
514
515 n = get_le32(pb);
516 for(i=0;i<n;i++) {
517 num = get_le16(pb); /* stream number */
518 get_str16(pb, str, sizeof(str));
519 get_str16(pb, str, sizeof(str));
520 len = get_le16(pb);
521 q = tag;
522 while (len > 0) {
523 v1 = get_byte(pb);
524 if ((q - tag) < sizeof(tag) - 1)
525 *q++ = v1;
526 len--;
527 }
528 *q = '\0';
529 }
530 #endif
531 } else if (url_feof(pb)) {
532 return -1;
533 } else {
534 url_fseek(pb, gsize - 24, SEEK_CUR);
535 }
536 }
537 get_guid(pb, &g);
538 get_le64(pb);
539 get_byte(pb);
540 get_byte(pb);
541 if (url_feof(pb))
542 return -1;
543 asf->data_offset = url_ftell(pb);
544 asf->packet_size_left = 0;
545
546
547 for(i=0; i<128; i++){
548 int stream_num= asf->asfid2avid[i];
549 if(stream_num>=0){
550 AVStream *st = s->streams[stream_num];
551 if (!st->codec->bit_rate)
552 st->codec->bit_rate = bitrate[i];
553 if (dar[i].num > 0 && dar[i].den > 0)
554 av_reduce(&st->sample_aspect_ratio.num,
555 &st->sample_aspect_ratio.den,
556 dar[i].num, dar[i].den, INT_MAX);
557 //av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
558
559 // copy and convert language codes to the frontend
560 if (asf->streams[i].stream_language_index < 128) {
561 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
562 if (rfc1766 && strlen(rfc1766) > 1) {
563 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
564 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
565 if (iso6392)
566 av_metadata_set(&st->metadata, "language", iso6392);
567 }
568 }
569 }
570 }
571
572 return 0;
573 }
574
575 #define DO_2BITS(bits, var, defval) \
576 switch (bits & 3) \
577 { \
578 case 3: var = get_le32(pb); rsize += 4; break; \
579 case 2: var = get_le16(pb); rsize += 2; break; \
580 case 1: var = get_byte(pb); rsize++; break; \
581 default: var = defval; break; \
582 }
583
584 int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
585 {
586 ASFContext *asf = s->priv_data;
587 uint32_t packet_length, padsize;
588 int rsize = 8;
589 int c, d, e, off;
590
591 off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
592
593 c=d=e=-1;
594 while(off-- > 0){
595 c=d; d=e;
596 e= get_byte(pb);
597 if(c == 0x82 && !d && !e)
598 break;
599 }
600
601 if (c != 0x82) {
602 if (!url_feof(pb))
603 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
604 }
605 if ((c & 0x8f) == 0x82) {
606 if (d || e) {
607 if (!url_feof(pb))
608 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
609 return -1;
610 }
611 c= get_byte(pb);
612 d= get_byte(pb);
613 rsize+=3;
614 }else{
615 url_fseek(pb, -1, SEEK_CUR); //FIXME
616 }
617
618 asf->packet_flags = c;
619 asf->packet_property = d;
620
621 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
622 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
623 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
624
625 //the following checks prevent overflows and infinite loops
626 if(packet_length >= (1U<<29)){
627 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
628 return -1;
629 }
630 if(padsize >= packet_length){
631 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
632 return -1;
633 }
634
635 asf->packet_timestamp = get_le32(pb);
636 get_le16(pb); /* duration */
637 // rsize has at least 11 bytes which have to be present
638
639 if (asf->packet_flags & 0x01) {
640 asf->packet_segsizetype = get_byte(pb); rsize++;
641 asf->packet_segments = asf->packet_segsizetype & 0x3f;
642 } else {
643 asf->packet_segments = 1;
644 asf->packet_segsizetype = 0x80;
645 }
646 asf->packet_size_left = packet_length - padsize - rsize;
647 if (packet_length < asf->hdr.min_pktsize)
648 padsize += asf->hdr.min_pktsize - packet_length;
649 asf->packet_padsize = padsize;
650 dprintf(s, "packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
651 return 0;
652 }
653
654 /**
655 *
656 * @return <0 if error
657 */
658 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
659 ASFContext *asf = s->priv_data;
660 int rsize = 1;
661 int num = get_byte(pb);
662 int64_t ts0, ts1;
663
664 asf->packet_segments--;
665 asf->packet_key_frame = num >> 7;
666 asf->stream_index = asf->asfid2avid[num & 0x7f];
667 // sequence should be ignored!
668 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
669 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
670 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
671 //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);
672 if (asf->packet_replic_size >= 8) {
673 asf->packet_obj_size = get_le32(pb);
674 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
675 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
676 return -1;
677 }
678 asf->packet_frag_timestamp = get_le32(pb); // timestamp
679 if(asf->packet_replic_size >= 8+38+4){
680 // for(i=0; i<asf->packet_replic_size-8; i++)
681 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
682 // av_log(s, AV_LOG_DEBUG, "\n");
683 url_fskip(pb, 10);
684 ts0= get_le64(pb);
685 ts1= get_le64(pb);
686 url_fskip(pb, 12);
687 get_le32(pb);
688 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
689 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
690 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
691 }else
692 url_fskip(pb, asf->packet_replic_size - 8);
693 rsize += asf->packet_replic_size; // FIXME - check validity
694 } else if (asf->packet_replic_size==1){
695 // multipacket - frag_offset is beginning timestamp
696 asf->packet_time_start = asf->packet_frag_offset;
697 asf->packet_frag_offset = 0;
698 asf->packet_frag_timestamp = asf->packet_timestamp;
699
700 asf->packet_time_delta = get_byte(pb);
701 rsize++;
702 }else if(asf->packet_replic_size!=0){
703 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
704 return -1;
705 }
706 if (asf->packet_flags & 0x01) {
707 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
708 if(asf->packet_frag_size > asf->packet_size_left - rsize){
709 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
710 return -1;
711 }
712 //printf("Fragsize %d\n", asf->packet_frag_size);
713 } else {
714 asf->packet_frag_size = asf->packet_size_left - rsize;
715 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
716 }
717 if (asf->packet_replic_size == 1) {
718 asf->packet_multi_size = asf->packet_frag_size;
719 if (asf->packet_multi_size > asf->packet_size_left)
720 return -1;
721 }
722 asf->packet_size_left -= rsize;
723 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
724
725 return 0;
726 }
727
728 int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
729 {
730 ASFContext *asf = s->priv_data;
731 ASFStream *asf_st = 0;
732 for (;;) {
733 if(url_feof(pb))
734 return AVERROR_EOF;
735 if (asf->packet_size_left < FRAME_HEADER_SIZE
736 || asf->packet_segments < 1) {
737 //asf->packet_size_left <= asf->packet_padsize) {
738 int ret = asf->packet_size_left + asf->packet_padsize;
739 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
740 assert(ret>=0);
741 /* fail safe */
742 url_fskip(pb, ret);
743
744 asf->packet_pos= url_ftell(pb);
745 if (asf->data_object_size != (uint64_t)-1 &&
746 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
747 return AVERROR_EOF; /* Do not exceed the size of the data object */
748 return 1;
749 }
750 if (asf->packet_time_start == 0) {
751 if(asf_read_frame_header(s, pb) < 0){
752 asf->packet_segments= 0;
753 continue;
754 }
755 if (asf->stream_index < 0
756 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
757 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
758 ) {
759 asf->packet_time_start = 0;
760 /* unhandled packet (should not happen) */
761 url_fskip(pb, asf->packet_frag_size);
762 asf->packet_size_left -= asf->packet_frag_size;
763 if(asf->stream_index < 0)
764 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
765 continue;
766 }
767 asf->asf_st = s->streams[asf->stream_index]->priv_data;
768 }
769 asf_st = asf->asf_st;
770
771 if (asf->packet_replic_size == 1) {
772 // frag_offset is here used as the beginning timestamp
773 asf->packet_frag_timestamp = asf->packet_time_start;
774 asf->packet_time_start += asf->packet_time_delta;
775 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
776 asf->packet_size_left--;
777 asf->packet_multi_size--;
778 if (asf->packet_multi_size < asf->packet_obj_size)
779 {
780 asf->packet_time_start = 0;
781 url_fskip(pb, asf->packet_multi_size);
782 asf->packet_size_left -= asf->packet_multi_size;
783 continue;
784 }
785 asf->packet_multi_size -= asf->packet_obj_size;
786 //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);
787 }
788 if( /*asf->packet_frag_size == asf->packet_obj_size*/
789 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
790 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
791 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
792 asf_st->frag_offset, asf->packet_frag_size,
793 asf->packet_obj_size, asf_st->pkt.size);
794 asf->packet_obj_size= asf_st->pkt.size;
795 }
796
797 if ( asf_st->pkt.size != asf->packet_obj_size
798 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
799 if(asf_st->pkt.data){
800 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
801 asf_st->frag_offset = 0;
802 av_free_packet(&asf_st->pkt);
803 }
804 /* new packet */
805 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
806 asf_st->seq = asf->packet_seq;
807 asf_st->pkt.dts = asf->packet_frag_timestamp;
808 asf_st->pkt.stream_index = asf->stream_index;
809 asf_st->pkt.pos =
810 asf_st->packet_pos= asf->packet_pos;
811 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
812 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
813 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
814 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
815 asf->packet_key_frame = 1;
816 if (asf->packet_key_frame)
817 asf_st->pkt.flags |= PKT_FLAG_KEY;
818 }
819
820 /* read data */
821 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
822 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
823 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
824 asf->packet_size_left -= asf->packet_frag_size;
825 if (asf->packet_size_left < 0)
826 continue;
827
828 if( asf->packet_frag_offset >= asf_st->pkt.size
829 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
830 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
831 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
832 continue;
833 }
834
835 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
836 asf->packet_frag_size);
837 if (s->key && s->keylen == 20)
838 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
839 asf->packet_frag_size);
840 asf_st->frag_offset += asf->packet_frag_size;
841 /* test if whole packet is read */
842 if (asf_st->frag_offset == asf_st->pkt.size) {
843 //workaround for macroshit radio DVR-MS files
844 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
845 && asf_st->pkt.size > 100){
846 int i;
847 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
848 if(i == asf_st->pkt.size){
849 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
850 asf_st->frag_offset = 0;
851 av_free_packet(&asf_st->pkt);
852 continue;
853 }
854 }
855
856 /* return packet */
857 if (asf_st->ds_span > 1) {
858 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
859 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
860 }else{
861 /* packet descrambling */
862 uint8_t *newdata = av_malloc(asf_st->pkt.size);
863 if (newdata) {
864 int offset = 0;
865 while (offset < asf_st->pkt.size) {
866 int off = offset / asf_st->ds_chunk_size;
867 int row = off / asf_st->ds_span;
868 int col = off % asf_st->ds_span;
869 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
870 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
871
872 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
873 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
874 memcpy(newdata + offset,
875 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
876 asf_st->ds_chunk_size);
877 offset += asf_st->ds_chunk_size;
878 }
879 av_free(asf_st->pkt.data);
880 asf_st->pkt.data = newdata;
881 }
882 }
883 }
884 asf_st->frag_offset = 0;
885 *pkt= asf_st->pkt;
886 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
887 asf_st->pkt.size = 0;
888 asf_st->pkt.data = 0;
889 break; // packet completed
890 }
891 }
892 return 0;
893 }
894
895 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
896 {
897 ASFContext *asf = s->priv_data;
898
899 for (;;) {
900 int ret;
901
902 /* parse cached packets, if any */
903 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
904 return ret;
905 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
906 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
907 asf->packet_time_start = 0;
908 }
909
910 return 0;
911 }
912
913 // Added to support seeking after packets have been read
914 // If information is not reset, read_packet fails due to
915 // leftover information from previous reads
916 static void asf_reset_header(AVFormatContext *s)
917 {
918 ASFContext *asf = s->priv_data;
919 ASFStream *asf_st;
920 int i;
921
922 asf->packet_nb_frames = 0;
923 asf->packet_size_left = 0;
924 asf->packet_segments = 0;
925 asf->packet_flags = 0;
926 asf->packet_property = 0;
927 asf->packet_timestamp = 0;
928 asf->packet_segsizetype = 0;
929 asf->packet_segments = 0;
930 asf->packet_seq = 0;
931 asf->packet_replic_size = 0;
932 asf->packet_key_frame = 0;
933 asf->packet_padsize = 0;
934 asf->packet_frag_offset = 0;
935 asf->packet_frag_size = 0;
936 asf->packet_frag_timestamp = 0;
937 asf->packet_multi_size = 0;
938 asf->packet_obj_size = 0;
939 asf->packet_time_delta = 0;
940 asf->packet_time_start = 0;
941
942 for(i=0; i<s->nb_streams; i++){
943 asf_st= s->streams[i]->priv_data;
944 av_free_packet(&asf_st->pkt);
945 asf_st->frag_offset=0;
946 asf_st->seq=0;
947 }
948 asf->asf_st= NULL;
949 }
950
951 static int asf_read_close(AVFormatContext *s)
952 {
953 int i;
954
955 asf_reset_header(s);
956 for(i=0;i<s->nb_streams;i++) {
957 AVStream *st = s->streams[i];
958 av_free(st->codec->palctrl);
959 }
960 return 0;
961 }
962
963 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
964 {
965 ASFContext *asf = s->priv_data;
966 AVPacket pkt1, *pkt = &pkt1;
967 ASFStream *asf_st;
968 int64_t pts;
969 int64_t pos= *ppos;
970 int i;
971 int64_t start_pos[s->nb_streams];
972
973 for(i=0; i<s->nb_streams; i++){
974 start_pos[i]= pos;
975 }
976
977 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
978 *ppos= pos;
979 url_fseek(s->pb, pos, SEEK_SET);
980
981 //printf("asf_read_pts\n");
982 asf_reset_header(s);
983 for(;;){
984 if (av_read_frame(s, pkt) < 0){
985 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
986 return AV_NOPTS_VALUE;
987 }
988
989 pts= pkt->pts;
990
991 av_free_packet(pkt);
992 if(pkt->flags&PKT_FLAG_KEY){
993 i= pkt->stream_index;
994
995 asf_st= s->streams[i]->priv_data;
996
997 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
998 pos= asf_st->packet_pos;
999
1000 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1001 start_pos[i]= asf_st->packet_pos + 1;
1002
1003 if(pkt->stream_index == stream_index)
1004 break;
1005 }
1006 }
1007
1008 *ppos= pos;
1009 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1010
1011 return pts;
1012 }
1013
1014 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1015 {
1016 ff_asf_guid g;
1017 ASFContext *asf = s->priv_data;
1018 int64_t current_pos= url_ftell(s->pb);
1019 int i;
1020
1021 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1022 get_guid(s->pb, &g);
1023 if (!guidcmp(&g, &index_guid)) {
1024 int64_t itime;
1025 int pct, ict;
1026 int64_t av_unused gsize= get_le64(s->pb);
1027 get_guid(s->pb, &g);
1028 itime=get_le64(s->pb);
1029 pct=get_le32(s->pb);
1030 ict=get_le32(s->pb);
1031 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1032
1033 for (i=0;i<ict;i++){
1034 int pktnum=get_le32(s->pb);
1035 int pktct =get_le16(s->pb);
1036 int64_t pos = s->data_offset + asf->packet_size*(int64_t)pktnum;
1037 int64_t index_pts= av_rescale(itime, i, 10000);
1038
1039 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1040 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1041 }
1042 asf->index_read= 1;
1043 }
1044 url_fseek(s->pb, current_pos, SEEK_SET);
1045 }
1046
1047 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1048 {
1049 ASFContext *asf = s->priv_data;
1050 AVStream *st = s->streams[stream_index];
1051 int64_t pos;
1052 int index;
1053
1054 if (asf->packet_size <= 0)
1055 return -1;
1056
1057 /* Try using the protocol's read_seek if available */
1058 if(s->pb) {
1059 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1060 if(ret >= 0)
1061 asf_reset_header(s);
1062 if (ret != AVERROR(ENOSYS))
1063 return ret;
1064 }
1065
1066 if (!asf->index_read)
1067 asf_build_simple_index(s, stream_index);
1068
1069 if(!(asf->index_read && st->index_entries)){
1070 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1071 return -1;
1072 }else{
1073 index= av_index_search_timestamp(st, pts, flags);
1074 if(index<0)
1075 return -1;
1076
1077 /* find the position */
1078 pos = st->index_entries[index].pos;
1079
1080 // various attempts to find key frame have failed so far
1081 // asf_reset_header(s);
1082 // url_fseek(s->pb, pos, SEEK_SET);
1083 // key_pos = pos;
1084 // for(i=0;i<16;i++){
1085 // pos = url_ftell(s->pb);
1086 // if (av_read_frame(s, &pkt) < 0){
1087 // av_log(s, AV_LOG_INFO, "seek failed\n");
1088 // return -1;
1089 // }
1090 // asf_st = s->streams[stream_index]->priv_data;
1091 // pos += st->parser->frame_offset;
1092 //
1093 // if (pkt.size > b) {
1094 // b = pkt.size;
1095 // key_pos = pos;
1096 // }
1097 //
1098 // av_free_packet(&pkt);
1099 // }
1100
1101 /* do the seek */
1102 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1103 url_fseek(s->pb, pos, SEEK_SET);
1104 }
1105 asf_reset_header(s);
1106 return 0;
1107 }
1108
1109 AVInputFormat asf_demuxer = {
1110 "asf",
1111 NULL_IF_CONFIG_SMALL("ASF format"),
1112 sizeof(ASFContext),
1113 asf_probe,
1114 asf_read_header,
1115 asf_read_packet,
1116 asf_read_close,
1117 asf_read_seek,
1118 asf_read_pts,
1119 .metadata_conv = ff_asf_metadata_conv,
1120 };
ffmpeg Lagarith lossless decoder