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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 <inttypes.h>
23
24#include "libavutil/attributes.h"
25#include "libavutil/avassert.h"
26#include "libavutil/avstring.h"
27#include "libavutil/bswap.h"
28#include "libavutil/common.h"
29#include "libavutil/dict.h"
30#include "libavutil/internal.h"
31#include "libavutil/mathematics.h"
32#include "libavutil/opt.h"
33#include "avformat.h"
34#include "avio_internal.h"
35#include "avlanguage.h"
36#include "id3v2.h"
37#include "internal.h"
38#include "riff.h"
39#include "asf.h"
40#include "asfcrypt.h"
41
42typedef struct ASFPayload {
43 uint8_t type;
44 uint16_t size;
45} ASFPayload;
46
47typedef struct ASFStream {
48 int num;
49 unsigned char seq;
50 /* use for reading */
51 AVPacket pkt;
52 int frag_offset;
53 int packet_obj_size;
54 int timestamp;
55 int64_t duration;
56 int skip_to_key;
57 int pkt_clean;
58
59 int ds_span; /* descrambling */
60 int ds_packet_size;
61 int ds_chunk_size;
62
63 int64_t packet_pos;
64
65 uint16_t stream_language_index;
66
67 int palette_changed;
68 uint32_t palette[256];
69
70 int payload_ext_ct;
71 ASFPayload payload[8];
72} ASFStream;
73
74typedef struct ASFContext {
75 const AVClass *class;
76 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
77 ASFStream streams[128]; ///< it's max number and it's not that big
78 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
79 AVRational dar[128];
80 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
81 /* non streamed additonnal info */
82 /* packet filling */
83 int packet_size_left;
84 /* only for reading */
85 uint64_t data_offset; ///< beginning of the first data packet
86 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
87 uint64_t data_object_size; ///< size of the data object
88 int index_read;
89
90 ASFMainHeader hdr;
91
92 int packet_flags;
93 int packet_property;
94 int packet_timestamp;
95 int packet_segsizetype;
96 int packet_segments;
97 int packet_seq;
98 int packet_replic_size;
99 int packet_key_frame;
100 int packet_padsize;
101 unsigned int packet_frag_offset;
102 unsigned int packet_frag_size;
103 int64_t packet_frag_timestamp;
104 int ts_is_pts;
105 int packet_multi_size;
106 int packet_time_delta;
107 int packet_time_start;
108 int64_t packet_pos;
109
110 int stream_index;
111
112 ASFStream *asf_st; ///< currently decoded stream
113
114 int no_resync_search;
115 int export_xmp;
116
117 int uses_std_ecc;
118} ASFContext;
119
120static const AVOption options[] = {
121 { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
122 { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
123 { NULL },
124};
125
126static const AVClass asf_class = {
127 .class_name = "asf demuxer",
128 .item_name = av_default_item_name,
129 .option = options,
130 .version = LIBAVUTIL_VERSION_INT,
131};
132
133#undef NDEBUG
134#include <assert.h>
135
136#define ASF_MAX_STREAMS 127
137#define FRAME_HEADER_SIZE 6
138// Fix Me! FRAME_HEADER_SIZE may be different.
139// (7 is known to be too large for GipsyGuitar.wmv)
140
141#ifdef DEBUG
142static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
143 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
144};
145
146#define PRINT_IF_GUID(g, cmp) \
147 if (!ff_guidcmp(g, &cmp)) \
148 av_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp)
149
150static void print_guid(ff_asf_guid *g)
151{
152 int i;
153 PRINT_IF_GUID(g, ff_asf_header);
154 else PRINT_IF_GUID(g, ff_asf_file_header);
155 else PRINT_IF_GUID(g, ff_asf_stream_header);
156 else PRINT_IF_GUID(g, ff_asf_audio_stream);
157 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
158 else PRINT_IF_GUID(g, ff_asf_video_stream);
159 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
160 else PRINT_IF_GUID(g, ff_asf_command_stream);
161 else PRINT_IF_GUID(g, ff_asf_comment_header);
162 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
163 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
164 else PRINT_IF_GUID(g, ff_asf_data_header);
165 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
166 else PRINT_IF_GUID(g, ff_asf_head1_guid);
167 else PRINT_IF_GUID(g, ff_asf_head2_guid);
168 else PRINT_IF_GUID(g, ff_asf_my_guid);
169 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
170 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
171 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
172 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
173 else PRINT_IF_GUID(g, ff_asf_metadata_header);
174 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
175 else PRINT_IF_GUID(g, ff_asf_marker_header);
176 else PRINT_IF_GUID(g, stream_bitrate_guid);
177 else PRINT_IF_GUID(g, ff_asf_language_guid);
178 else
179 av_log(NULL, AV_LOG_TRACE, "(GUID: unknown) ");
180 for (i = 0; i < 16; i++)
181 av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]);
182 av_log(NULL, AV_LOG_TRACE, "}\n");
183}
184#undef PRINT_IF_GUID
185#else
186#define print_guid(g) while(0)
187#endif
188
189static int asf_probe(AVProbeData *pd)
190{
191 /* check file header */
192 if (!ff_guidcmp(pd->buf, &ff_asf_header))
193 return AVPROBE_SCORE_MAX;
194 else
195 return 0;
196}
197
198/* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
199 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
200static int get_value(AVIOContext *pb, int type, int type2_size)
201{
202 switch (type) {
203 case 2:
204 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
205 case 3:
206 return avio_rl32(pb);
207 case 4:
208 return avio_rl64(pb);
209 case 5:
210 return avio_rl16(pb);
211 default:
212 return INT_MIN;
213 }
214}
215
216/* MSDN claims that this should be "compatible with the ID3 frame, APIC",
217 * but in reality this is only loosely similar */
218static int asf_read_picture(AVFormatContext *s, int len)
219{
220 AVPacket pkt = { 0 };
221 const CodecMime *mime = ff_id3v2_mime_tags;
222 enum AVCodecID id = AV_CODEC_ID_NONE;
223 char mimetype[64];
224 uint8_t *desc = NULL;
225 AVStream *st = NULL;
226 int ret, type, picsize, desc_len;
227
228 /* type + picsize + mime + desc */
229 if (len < 1 + 4 + 2 + 2) {
230 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
231 return AVERROR_INVALIDDATA;
232 }
233
234 /* picture type */
235 type = avio_r8(s->pb);
236 len--;
237 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
238 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
239 type = 0;
240 }
241
242 /* picture data size */
243 picsize = avio_rl32(s->pb);
244 len -= 4;
245
246 /* picture MIME type */
247 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
248 while (mime->id != AV_CODEC_ID_NONE) {
249 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
250 id = mime->id;
251 break;
252 }
253 mime++;
254 }
255 if (id == AV_CODEC_ID_NONE) {
256 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
257 mimetype);
258 return 0;
259 }
260
261 if (picsize >= len) {
262 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
263 picsize, len);
264 return AVERROR_INVALIDDATA;
265 }
266
267 /* picture description */
268 desc_len = (len - picsize) * 2 + 1;
269 desc = av_malloc(desc_len);
270 if (!desc)
271 return AVERROR(ENOMEM);
272 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
273
274 ret = av_get_packet(s->pb, &pkt, picsize);
275 if (ret < 0)
276 goto fail;
277
278 st = avformat_new_stream(s, NULL);
279 if (!st) {
280 ret = AVERROR(ENOMEM);
281 goto fail;
282 }
283 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
284 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
285 st->codecpar->codec_id = id;
286 st->attached_pic = pkt;
287 st->attached_pic.stream_index = st->index;
288 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
289
290 if (*desc)
291 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
292 else
293 av_freep(&desc);
294
295 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
296
297 return 0;
298
299fail:
300 av_freep(&desc);
301 av_packet_unref(&pkt);
302 return ret;
303}
304
305static void get_id3_tag(AVFormatContext *s, int len)
306{
307 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
308
309 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
310 if (id3v2_extra_meta)
311 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
312 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
313}
314
315static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
316{
317 ASFContext *asf = s->priv_data;
318 char *value = NULL;
319 int64_t off = avio_tell(s->pb);
320#define LEN 22
321
322 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
323 return;
324
325 if (!asf->export_xmp && !strncmp(key, "xmp", 3))
326 goto finish;
327
328 value = av_malloc(2 * len + LEN);
329 if (!value)
330 goto finish;
331
332 switch (type) {
333 case ASF_UNICODE:
334 avio_get_str16le(s->pb, len, value, 2 * len + 1);
335 break;
336 case -1: // ASCI
337 avio_read(s->pb, value, len);
338 value[len]=0;
339 break;
340 case ASF_BYTE_ARRAY:
341 if (!strcmp(key, "WM/Picture")) { // handle cover art
342 asf_read_picture(s, len);
343 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
344 get_id3_tag(s, len);
345 } else {
346 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
347 }
348 goto finish;
349 case ASF_BOOL:
350 case ASF_DWORD:
351 case ASF_QWORD:
352 case ASF_WORD: {
353 uint64_t num = get_value(s->pb, type, type2_size);
354 snprintf(value, LEN, "%"PRIu64, num);
355 break;
356 }
357 case ASF_GUID:
358 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
359 goto finish;
360 default:
361 av_log(s, AV_LOG_DEBUG,
362 "Unsupported value type %d in tag %s.\n", type, key);
363 goto finish;
364 }
365 if (*value)
366 av_dict_set(&s->metadata, key, value, 0);
367
368finish:
369 av_freep(&value);
370 avio_seek(s->pb, off + len, SEEK_SET);
371}
372
373static int asf_read_file_properties(AVFormatContext *s, int64_t size)
374{
375 ASFContext *asf = s->priv_data;
376 AVIOContext *pb = s->pb;
377
378 ff_get_guid(pb, &asf->hdr.guid);
379 asf->hdr.file_size = avio_rl64(pb);
380 asf->hdr.create_time = avio_rl64(pb);
381 avio_rl64(pb); /* number of packets */
382 asf->hdr.play_time = avio_rl64(pb);
383 asf->hdr.send_time = avio_rl64(pb);
384 asf->hdr.preroll = avio_rl32(pb);
385 asf->hdr.ignore = avio_rl32(pb);
386 asf->hdr.flags = avio_rl32(pb);
387 asf->hdr.min_pktsize = avio_rl32(pb);
388 asf->hdr.max_pktsize = avio_rl32(pb);
389 if (asf->hdr.min_pktsize >= (1U << 29))
390 return AVERROR_INVALIDDATA;
391 asf->hdr.max_bitrate = avio_rl32(pb);
392 s->packet_size = asf->hdr.max_pktsize;
393
394 return 0;
395}
396
397static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
398{
399 ASFContext *asf = s->priv_data;
400 AVIOContext *pb = s->pb;
401 AVStream *st;
402 ASFStream *asf_st;
403 ff_asf_guid g;
404 enum AVMediaType type;
405 int type_specific_size, sizeX;
406 unsigned int tag1;
407 int64_t pos1, pos2, start_time;
408 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
409
410 if (s->nb_streams == ASF_MAX_STREAMS) {
411 av_log(s, AV_LOG_ERROR, "too many streams\n");
412 return AVERROR(EINVAL);
413 }
414
415 pos1 = avio_tell(pb);
416
417 st = avformat_new_stream(s, NULL);
418 if (!st)
419 return AVERROR(ENOMEM);
420 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
421 start_time = asf->hdr.preroll;
422
423 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
424 int64_t fsize = avio_size(pb);
425 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
426 20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size))
427 st->duration = asf->hdr.play_time /
428 (10000000 / 1000) - start_time;
429 }
430 ff_get_guid(pb, &g);
431
432 test_for_ext_stream_audio = 0;
433 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
434 type = AVMEDIA_TYPE_AUDIO;
435 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
436 type = AVMEDIA_TYPE_VIDEO;
437 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
438 type = AVMEDIA_TYPE_VIDEO;
439 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
440 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
441 type = AVMEDIA_TYPE_DATA;
442 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
443 test_for_ext_stream_audio = 1;
444 type = AVMEDIA_TYPE_UNKNOWN;
445 } else {
446 return -1;
447 }
448 ff_get_guid(pb, &g);
449 avio_skip(pb, 8); /* total_size */
450 type_specific_size = avio_rl32(pb);
451 avio_rl32(pb);
452 st->id = avio_rl16(pb) & 0x7f; /* stream id */
453 // mapping of asf ID to AV stream ID;
454 asf->asfid2avid[st->id] = s->nb_streams - 1;
455 asf_st = &asf->streams[st->id];
456
457 avio_rl32(pb);
458
459 if (test_for_ext_stream_audio) {
460 ff_get_guid(pb, &g);
461 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
462 type = AVMEDIA_TYPE_AUDIO;
463 is_dvr_ms_audio = 1;
464 ff_get_guid(pb, &g);
465 avio_rl32(pb);
466 avio_rl32(pb);
467 avio_rl32(pb);
468 ff_get_guid(pb, &g);
469 avio_rl32(pb);
470 }
471 }
472
473 st->codecpar->codec_type = type;
474 if (type == AVMEDIA_TYPE_AUDIO) {
475 int ret = ff_get_wav_header(s, pb, st->codecpar, type_specific_size, 0);
476 if (ret < 0)
477 return ret;
478 if (is_dvr_ms_audio) {
479 // codec_id and codec_tag are unreliable in dvr_ms
480 // files. Set them later by probing stream.
481 st->request_probe = 1;
482 st->codecpar->codec_tag = 0;
483 }
484 if (st->codecpar->codec_id == AV_CODEC_ID_AAC)
485 st->need_parsing = AVSTREAM_PARSE_NONE;
486 else
487 st->need_parsing = AVSTREAM_PARSE_FULL;
488 /* We have to init the frame size at some point .... */
489 pos2 = avio_tell(pb);
490 if (size >= (pos2 + 8 - pos1 + 24)) {
491 asf_st->ds_span = avio_r8(pb);
492 asf_st->ds_packet_size = avio_rl16(pb);
493 asf_st->ds_chunk_size = avio_rl16(pb);
494 avio_rl16(pb); // ds_data_size
495 avio_r8(pb); // ds_silence_data
496 }
497 if (asf_st->ds_span > 1) {
498 if (!asf_st->ds_chunk_size ||
499 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
500 asf_st->ds_packet_size % asf_st->ds_chunk_size)
501 asf_st->ds_span = 0; // disable descrambling
502 }
503 } else if (type == AVMEDIA_TYPE_VIDEO &&
504 size - (avio_tell(pb) - pos1 + 24) >= 51) {
505 avio_rl32(pb);
506 avio_rl32(pb);
507 avio_r8(pb);
508 avio_rl16(pb); /* size */
509 sizeX = avio_rl32(pb); /* size */
510 st->codecpar->width = avio_rl32(pb);
511 st->codecpar->height = avio_rl32(pb);
512 /* not available for asf */
513 avio_rl16(pb); /* panes */
514 st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
515 tag1 = avio_rl32(pb);
516 avio_skip(pb, 20);
517 if (sizeX > 40) {
518 st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40);
519 st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size +
520 AV_INPUT_BUFFER_PADDING_SIZE);
521 if (!st->codecpar->extradata)
522 return AVERROR(ENOMEM);
523 avio_read(pb, st->codecpar->extradata, st->codecpar->extradata_size);
524 }
525
526 /* Extract palette from extradata if bpp <= 8 */
527 /* This code assumes that extradata contains only palette */
528 /* This is true for all paletted codecs implemented in libavcodec */
529 if (st->codecpar->extradata_size && (st->codecpar->bits_per_coded_sample <= 8)) {
530#if HAVE_BIGENDIAN
531 int i;
532 for (i = 0; i < FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE) / 4; i++)
533 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codecpar->extradata)[i]);
534#else
535 memcpy(asf_st->palette, st->codecpar->extradata,
536 FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE));
537#endif
538 asf_st->palette_changed = 1;
539 }
540
541 st->codecpar->codec_tag = tag1;
542 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
543 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
544 st->need_parsing = AVSTREAM_PARSE_FULL;
545 /* issue658 contains wrong w/h and MS even puts a fake seq header
546 * with wrong w/h in extradata while a correct one is in the stream.
547 * maximum lameness */
548 st->codecpar->width =
549 st->codecpar->height = 0;
550 av_freep(&st->codecpar->extradata);
551 st->codecpar->extradata_size = 0;
552 }
553 if (st->codecpar->codec_id == AV_CODEC_ID_H264)
554 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
555 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
556 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
557 }
558 pos2 = avio_tell(pb);
559 avio_skip(pb, size - (pos2 - pos1 + 24));
560
561 return 0;
562}
563
564static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
565{
566 ASFContext *asf = s->priv_data;
567 AVIOContext *pb = s->pb;
568 ff_asf_guid g;
569 int ext_len, payload_ext_ct, stream_ct, i;
570 uint32_t leak_rate, stream_num;
571 unsigned int stream_languageid_index;
572
573 avio_rl64(pb); // starttime
574 avio_rl64(pb); // endtime
575 leak_rate = avio_rl32(pb); // leak-datarate
576 avio_rl32(pb); // bucket-datasize
577 avio_rl32(pb); // init-bucket-fullness
578 avio_rl32(pb); // alt-leak-datarate
579 avio_rl32(pb); // alt-bucket-datasize
580 avio_rl32(pb); // alt-init-bucket-fullness
581 avio_rl32(pb); // max-object-size
582 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
583 stream_num = avio_rl16(pb); // stream-num
584
585 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
586 if (stream_num < 128)
587 asf->streams[stream_num].stream_language_index = stream_languageid_index;
588
589 avio_rl64(pb); // avg frametime in 100ns units
590 stream_ct = avio_rl16(pb); // stream-name-count
591 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
592
593 if (stream_num < 128) {
594 asf->stream_bitrates[stream_num] = leak_rate;
595 asf->streams[stream_num].payload_ext_ct = 0;
596 }
597
598 for (i = 0; i < stream_ct; i++) {
599 avio_rl16(pb);
600 ext_len = avio_rl16(pb);
601 avio_skip(pb, ext_len);
602 }
603
604 for (i = 0; i < payload_ext_ct; i++) {
605 int size;
606 ff_get_guid(pb, &g);
607 size = avio_rl16(pb);
608 ext_len = avio_rl32(pb);
609 avio_skip(pb, ext_len);
610 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
611 ASFPayload *p = &asf->streams[stream_num].payload[i];
612 p->type = g[0];
613 p->size = size;
614 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
615 asf->streams[stream_num].payload_ext_ct ++;
616 }
617 }
618
619 return 0;
620}
621
622static int asf_read_content_desc(AVFormatContext *s, int64_t size)
623{
624 AVIOContext *pb = s->pb;
625 int len1, len2, len3, len4, len5;
626
627 len1 = avio_rl16(pb);
628 len2 = avio_rl16(pb);
629 len3 = avio_rl16(pb);
630 len4 = avio_rl16(pb);
631 len5 = avio_rl16(pb);
632 get_tag(s, "title", 0, len1, 32);
633 get_tag(s, "author", 0, len2, 32);
634 get_tag(s, "copyright", 0, len3, 32);
635 get_tag(s, "comment", 0, len4, 32);
636 avio_skip(pb, len5);
637
638 return 0;
639}
640
641static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
642{
643 AVIOContext *pb = s->pb;
644 ASFContext *asf = s->priv_data;
645 int desc_count, i, ret;
646
647 desc_count = avio_rl16(pb);
648 for (i = 0; i < desc_count; i++) {
649 int name_len, value_type, value_len;
650 char name[1024];
651
652 name_len = avio_rl16(pb);
653 if (name_len % 2) // must be even, broken lavf versions wrote len-1
654 name_len += 1;
655 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
656 avio_skip(pb, name_len - ret);
657 value_type = avio_rl16(pb);
658 value_len = avio_rl16(pb);
659 if (!value_type && value_len % 2)
660 value_len += 1;
661 /* My sample has that stream set to 0 maybe that mean the container.
662 * ASF stream count starts at 1. I am using 0 to the container value
663 * since it's unused. */
664 if (!strcmp(name, "AspectRatioX"))
665 asf->dar[0].num = get_value(s->pb, value_type, 32);
666 else if (!strcmp(name, "AspectRatioY"))
667 asf->dar[0].den = get_value(s->pb, value_type, 32);
668 else
669 get_tag(s, name, value_type, value_len, 32);
670 }
671
672 return 0;
673}
674
675static int asf_read_language_list(AVFormatContext *s, int64_t size)
676{
677 AVIOContext *pb = s->pb;
678 ASFContext *asf = s->priv_data;
679 int j, ret;
680 int stream_count = avio_rl16(pb);
681 for (j = 0; j < stream_count; j++) {
682 char lang[6];
683 unsigned int lang_len = avio_r8(pb);
684 if ((ret = avio_get_str16le(pb, lang_len, lang,
685 sizeof(lang))) < lang_len)
686 avio_skip(pb, lang_len - ret);
687 if (j < 128)
688 av_strlcpy(asf->stream_languages[j], lang,
689 sizeof(*asf->stream_languages));
690 }
691
692 return 0;
693}
694
695static int asf_read_metadata(AVFormatContext *s, int64_t size)
696{
697 AVIOContext *pb = s->pb;
698 ASFContext *asf = s->priv_data;
699 int n, stream_num, name_len_utf16, name_len_utf8, value_len;
700 int ret, i;
701 n = avio_rl16(pb);
702
703 for (i = 0; i < n; i++) {
704 uint8_t *name;
705 int value_type;
706
707 avio_rl16(pb); // lang_list_index
708 stream_num = avio_rl16(pb);
709 name_len_utf16 = avio_rl16(pb);
710 value_type = avio_rl16(pb); /* value_type */
711 value_len = avio_rl32(pb);
712
713 name_len_utf8 = 2*name_len_utf16 + 1;
714 name = av_malloc(name_len_utf8);
715 if (!name)
716 return AVERROR(ENOMEM);
717
718 if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
719 avio_skip(pb, name_len_utf16 - ret);
720 av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
721 i, stream_num, name_len_utf16, value_type, value_len, name);
722
723 if (!strcmp(name, "AspectRatioX")){
724 int aspect_x = get_value(s->pb, value_type, 16);
725 if(stream_num < 128)
726 asf->dar[stream_num].num = aspect_x;
727 } else if(!strcmp(name, "AspectRatioY")){
728 int aspect_y = get_value(s->pb, value_type, 16);
729 if(stream_num < 128)
730 asf->dar[stream_num].den = aspect_y;
731 } else {
732 get_tag(s, name, value_type, value_len, 16);
733 }
734 av_freep(&name);
735 }
736
737 return 0;
738}
739
740static int asf_read_marker(AVFormatContext *s, int64_t size)
741{
742 AVIOContext *pb = s->pb;
743 ASFContext *asf = s->priv_data;
744 int i, count, name_len, ret;
745 char name[1024];
746
747 avio_rl64(pb); // reserved 16 bytes
748 avio_rl64(pb); // ...
749 count = avio_rl32(pb); // markers count
750 avio_rl16(pb); // reserved 2 bytes
751 name_len = avio_rl16(pb); // name length
752 for (i = 0; i < name_len; i++)
753 avio_r8(pb); // skip the name
754
755 for (i = 0; i < count; i++) {
756 int64_t pres_time;
757 int name_len;
758
759 avio_rl64(pb); // offset, 8 bytes
760 pres_time = avio_rl64(pb); // presentation time
761 pres_time -= asf->hdr.preroll * 10000;
762 avio_rl16(pb); // entry length
763 avio_rl32(pb); // send time
764 avio_rl32(pb); // flags
765 name_len = avio_rl32(pb); // name length
766 if ((ret = avio_get_str16le(pb, name_len * 2, name,
767 sizeof(name))) < name_len)
768 avio_skip(pb, name_len - ret);
769 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
770 AV_NOPTS_VALUE, name);
771 }
772
773 return 0;
774}
775
776static int asf_read_header(AVFormatContext *s)
777{
778 ASFContext *asf = s->priv_data;
779 ff_asf_guid g;
780 AVIOContext *pb = s->pb;
781 int i;
782 int64_t gsize;
783
784 ff_get_guid(pb, &g);
785 if (ff_guidcmp(&g, &ff_asf_header))
786 return AVERROR_INVALIDDATA;
787 avio_rl64(pb);
788 avio_rl32(pb);
789 avio_r8(pb);
790 avio_r8(pb);
791 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
792
793 for (i = 0; i<128; i++)
794 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
795
796 for (;;) {
797 uint64_t gpos = avio_tell(pb);
798 int ret = 0;
799 ff_get_guid(pb, &g);
800 gsize = avio_rl64(pb);
801 print_guid(&g);
802 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
803 asf->data_object_offset = avio_tell(pb);
804 /* If not streaming, gsize is not unlimited (how?),
805 * and there is enough space in the file.. */
806 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
807 asf->data_object_size = gsize - 24;
808 else
809 asf->data_object_size = (uint64_t)-1;
810 break;
811 }
812 if (gsize < 24)
813 return AVERROR_INVALIDDATA;
814 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
815 ret = asf_read_file_properties(s, gsize);
816 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
817 ret = asf_read_stream_properties(s, gsize);
818 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
819 asf_read_content_desc(s, gsize);
820 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
821 asf_read_language_list(s, gsize);
822 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
823 asf_read_ext_content_desc(s, gsize);
824 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
825 asf_read_metadata(s, gsize);
826 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
827 asf_read_metadata(s, gsize);
828 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
829 asf_read_ext_stream_properties(s, gsize);
830
831 // there could be an optional stream properties object to follow
832 // if so the next iteration will pick it up
833 continue;
834 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
835 ff_get_guid(pb, &g);
836 avio_skip(pb, 6);
837 continue;
838 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
839 asf_read_marker(s, gsize);
840 } else if (avio_feof(pb)) {
841 return AVERROR_EOF;
842 } else {
843 if (!s->keylen) {
844 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
845 unsigned int len;
846 AVPacket pkt;
847 av_log(s, AV_LOG_WARNING,
848 "DRM protected stream detected, decoding will likely fail!\n");
849 len= avio_rl32(pb);
850 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
851
852 if ((ret = av_get_packet(pb, &pkt, len)) < 0)
853 return ret;
854 av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
855 av_packet_unref(&pkt);
856 len= avio_rl32(pb);
857 get_tag(s, "ASF_Protection_Type", -1, len, 32);
858 len= avio_rl32(pb);
859 get_tag(s, "ASF_Key_ID", -1, len, 32);
860 len= avio_rl32(pb);
861 get_tag(s, "ASF_License_URL", -1, len, 32);
862 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
863 av_log(s, AV_LOG_WARNING,
864 "Ext DRM protected stream detected, decoding will likely fail!\n");
865 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
866 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
867 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
868 }
869 }
870 }
871 if (ret < 0)
872 return ret;
873
874 if (avio_tell(pb) != gpos + gsize)
875 av_log(s, AV_LOG_DEBUG,
876 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
877 avio_tell(pb) - gpos, gsize);
878 avio_seek(pb, gpos + gsize, SEEK_SET);
879 }
880 ff_get_guid(pb, &g);
881 avio_rl64(pb);
882 avio_r8(pb);
883 avio_r8(pb);
884 if (avio_feof(pb))
885 return AVERROR_EOF;
886 asf->data_offset = avio_tell(pb);
887 asf->packet_size_left = 0;
888
889 for (i = 0; i < 128; i++) {
890 int stream_num = asf->asfid2avid[i];
891 if (stream_num >= 0) {
892 AVStream *st = s->streams[stream_num];
893 if (!st->codecpar->bit_rate)
894 st->codecpar->bit_rate = asf->stream_bitrates[i];
895 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
896 av_reduce(&st->sample_aspect_ratio.num,
897 &st->sample_aspect_ratio.den,
898 asf->dar[i].num, asf->dar[i].den, INT_MAX);
899 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
900 // Use ASF container value if the stream doesn't set AR.
901 (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO))
902 av_reduce(&st->sample_aspect_ratio.num,
903 &st->sample_aspect_ratio.den,
904 asf->dar[0].num, asf->dar[0].den, INT_MAX);
905
906 av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
907 i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
908 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
909
910 // copy and convert language codes to the frontend
911 if (asf->streams[i].stream_language_index < 128) {
912 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
913 if (rfc1766 && strlen(rfc1766) > 1) {
914 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
915 const char *iso6392 = ff_convert_lang_to(primary_tag,
916 AV_LANG_ISO639_2_BIBL);
917 if (iso6392)
918 av_dict_set(&st->metadata, "language", iso6392, 0);
919 }
920 }
921 }
922 }
923
924 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
925
926 return 0;
927}
928
929#define DO_2BITS(bits, var, defval) \
930 switch (bits & 3) { \
931 case 3: \
932 var = avio_rl32(pb); \
933 rsize += 4; \
934 break; \
935 case 2: \
936 var = avio_rl16(pb); \
937 rsize += 2; \
938 break; \
939 case 1: \
940 var = avio_r8(pb); \
941 rsize++; \
942 break; \
943 default: \
944 var = defval; \
945 break; \
946 }
947
948/**
949 * Load a single ASF packet into the demuxer.
950 * @param s demux context
951 * @param pb context to read data from
952 * @return 0 on success, <0 on error
953 */
954static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
955{
956 ASFContext *asf = s->priv_data;
957 uint32_t packet_length, padsize;
958 int rsize = 8;
959 int c, d, e, off;
960
961 if (asf->uses_std_ecc > 0) {
962 // if we do not know packet size, allow skipping up to 32 kB
963 off = 32768;
964 if (asf->no_resync_search)
965 off = 3;
966// else if (s->packet_size > 0 && !asf->uses_std_ecc)
967// off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
968
969 c = d = e = -1;
970 while (off-- > 0) {
971 c = d;
972 d = e;
973 e = avio_r8(pb);
974 if (c == 0x82 && !d && !e)
975 break;
976 }
977
978 if (c != 0x82) {
979 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
980 * if the packet sync code above triggers -EAGAIN). This does not
981 * imply complete -EAGAIN handling support at random positions in
982 * the stream. */
983 if (pb->error == AVERROR(EAGAIN))
984 return AVERROR(EAGAIN);
985 if (!avio_feof(pb))
986 av_log(s, AV_LOG_ERROR,
987 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
988 }
989 if ((c & 0x8f) == 0x82) {
990 if (d || e) {
991 if (!avio_feof(pb))
992 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
993 return AVERROR_INVALIDDATA;
994 }
995 c = avio_r8(pb);
996 d = avio_r8(pb);
997 rsize += 3;
998 } else if(!avio_feof(pb)) {
999 avio_seek(pb, -1, SEEK_CUR); // FIXME
1000 }
1001 } else {
1002 c = avio_r8(pb);
1003 if (c & 0x80) {
1004 rsize ++;
1005 if (!(c & 0x60)) {
1006 d = avio_r8(pb);
1007 e = avio_r8(pb);
1008 avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
1009 rsize += c & 0xF;
1010 }
1011
1012 if (c != 0x82)
1013 avpriv_request_sample(s, "Invalid ECC byte");
1014
1015 if (!asf->uses_std_ecc)
1016 asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
1017
1018 c = avio_r8(pb);
1019 } else
1020 asf->uses_std_ecc = -1;
1021 d = avio_r8(pb);
1022 }
1023
1024 asf->packet_flags = c;
1025 asf->packet_property = d;
1026
1027 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1028 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1029 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1030
1031 // the following checks prevent overflows and infinite loops
1032 if (!packet_length || packet_length >= (1U << 29)) {
1033 av_log(s, AV_LOG_ERROR,
1034 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1035 packet_length, avio_tell(pb));
1036 return AVERROR_INVALIDDATA;
1037 }
1038 if (padsize >= packet_length) {
1039 av_log(s, AV_LOG_ERROR,
1040 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1041 return AVERROR_INVALIDDATA;
1042 }
1043
1044 asf->packet_timestamp = avio_rl32(pb);
1045 avio_rl16(pb); /* duration */
1046 // rsize has at least 11 bytes which have to be present
1047
1048 if (asf->packet_flags & 0x01) {
1049 asf->packet_segsizetype = avio_r8(pb);
1050 rsize++;
1051 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1052 } else {
1053 asf->packet_segments = 1;
1054 asf->packet_segsizetype = 0x80;
1055 }
1056 if (rsize > packet_length - padsize) {
1057 asf->packet_size_left = 0;
1058 av_log(s, AV_LOG_ERROR,
1059 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1060 rsize, packet_length, padsize, avio_tell(pb));
1061 return AVERROR_INVALIDDATA;
1062 }
1063 asf->packet_size_left = packet_length - padsize - rsize;
1064 if (packet_length < asf->hdr.min_pktsize)
1065 padsize += asf->hdr.min_pktsize - packet_length;
1066 asf->packet_padsize = padsize;
1067 av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1068 s->packet_size, asf->packet_padsize, asf->packet_size_left);
1069 return 0;
1070}
1071
1072/**
1073 *
1074 * @return <0 if error
1075 */
1076static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
1077{
1078 ASFContext *asf = s->priv_data;
1079 ASFStream *asfst;
1080 int rsize = 1;
1081 int num = avio_r8(pb);
1082 int i;
1083 int64_t ts0, ts1 av_unused;
1084
1085 asf->packet_segments--;
1086 asf->packet_key_frame = num >> 7;
1087 asf->stream_index = asf->asfid2avid[num & 0x7f];
1088 asfst = &asf->streams[num & 0x7f];
1089 // sequence should be ignored!
1090 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1091 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1092 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1093 av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1094 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1095 asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1096 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1097 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1098 return AVERROR_INVALIDDATA;
1099 }
1100 if (asf->packet_replic_size >= 8) {
1101 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1102 AVRational aspect;
1103 asfst->packet_obj_size = avio_rl32(pb);
1104 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1105 av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1106 asfst->packet_obj_size = 0;
1107 return AVERROR_INVALIDDATA;
1108 }
1109 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1110
1111 for (i = 0; i < asfst->payload_ext_ct; i++) {
1112 ASFPayload *p = &asfst->payload[i];
1113 int size = p->size;
1114 int64_t payend;
1115 if (size == 0xFFFF)
1116 size = avio_rl16(pb);
1117 payend = avio_tell(pb) + size;
1118 if (payend > end) {
1119 av_log(s, AV_LOG_ERROR, "too long payload\n");
1120 break;
1121 }
1122 switch (p->type) {
1123 case 0x50:
1124// duration = avio_rl16(pb);
1125 break;
1126 case 0x54:
1127 aspect.num = avio_r8(pb);
1128 aspect.den = avio_r8(pb);
1129 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1130 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1131 }
1132 break;
1133 case 0x2A:
1134 avio_skip(pb, 8);
1135 ts0 = avio_rl64(pb);
1136 ts1 = avio_rl64(pb);
1137 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1138 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1139 asf->ts_is_pts = 1;
1140 break;
1141 case 0x5B:
1142 case 0xB7:
1143 case 0xCC:
1144 case 0xC0:
1145 case 0xA0:
1146 //unknown
1147 break;
1148 }
1149 avio_seek(pb, payend, SEEK_SET);
1150 }
1151
1152 avio_seek(pb, end, SEEK_SET);
1153 rsize += asf->packet_replic_size; // FIXME - check validity
1154 } else if (asf->packet_replic_size == 1) {
1155 // multipacket - frag_offset is beginning timestamp
1156 asf->packet_time_start = asf->packet_frag_offset;
1157 asf->packet_frag_offset = 0;
1158 asf->packet_frag_timestamp = asf->packet_timestamp;
1159
1160 asf->packet_time_delta = avio_r8(pb);
1161 rsize++;
1162 } else if (asf->packet_replic_size != 0) {
1163 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1164 asf->packet_replic_size);
1165 return AVERROR_INVALIDDATA;
1166 }
1167 if (asf->packet_flags & 0x01) {
1168 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1169 if (rsize > asf->packet_size_left) {
1170 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1171 return AVERROR_INVALIDDATA;
1172 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1173 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1174 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1175 asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1176 return AVERROR_INVALIDDATA;
1177 } else {
1178 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1179 asf->packet_size_left += diff;
1180 asf->packet_padsize -= diff;
1181 }
1182 }
1183 } else {
1184 asf->packet_frag_size = asf->packet_size_left - rsize;
1185 }
1186 if (asf->packet_replic_size == 1) {
1187 asf->packet_multi_size = asf->packet_frag_size;
1188 if (asf->packet_multi_size > asf->packet_size_left)
1189 return AVERROR_INVALIDDATA;
1190 }
1191 asf->packet_size_left -= rsize;
1192
1193 return 0;
1194}
1195
1196/**
1197 * Parse data from individual ASF packets (which were previously loaded
1198 * with asf_get_packet()).
1199 * @param s demux context
1200 * @param pb context to read data from
1201 * @param pkt pointer to store packet data into
1202 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1203 * packets need to be loaded (through asf_get_packet())
1204 */
1205static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1206{
1207 ASFContext *asf = s->priv_data;
1208 ASFStream *asf_st = 0;
1209 for (;;) {
1210 int ret;
1211 if (avio_feof(pb))
1212 return AVERROR_EOF;
1213 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1214 asf->packet_segments < 1 && asf->packet_time_start == 0) {
1215 int ret = asf->packet_size_left + asf->packet_padsize;
1216
1217 if (asf->packet_size_left && asf->packet_size_left < FRAME_HEADER_SIZE)
1218 av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1219
1220 assert(ret >= 0);
1221 /* fail safe */
1222 avio_skip(pb, ret);
1223
1224 asf->packet_pos = avio_tell(pb);
1225 if (asf->data_object_size != (uint64_t)-1 &&
1226 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1227 return AVERROR_EOF; /* Do not exceed the size of the data object */
1228 return 1;
1229 }
1230 if (asf->packet_time_start == 0) {
1231 if (asf_read_frame_header(s, pb) < 0) {
1232 asf->packet_time_start = asf->packet_segments = 0;
1233 continue;
1234 }
1235 if (asf->stream_index < 0 ||
1236 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1237 (!asf->packet_key_frame &&
1238 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1239 asf->packet_time_start = 0;
1240 /* unhandled packet (should not happen) */
1241 avio_skip(pb, asf->packet_frag_size);
1242 asf->packet_size_left -= asf->packet_frag_size;
1243 if (asf->stream_index < 0)
1244 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1245 asf->packet_frag_size);
1246 continue;
1247 }
1248 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1249 if (!asf->packet_frag_offset)
1250 asf->asf_st->skip_to_key = 0;
1251 }
1252 asf_st = asf->asf_st;
1253 av_assert0(asf_st);
1254
1255 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1256 av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1257 "stream:%d, expected:%d but got %d from pkt)\n",
1258 asf->stream_index, asf_st->frag_offset,
1259 asf->packet_frag_offset);
1260 avio_skip(pb, asf->packet_frag_size);
1261 asf->packet_size_left -= asf->packet_frag_size;
1262 continue;
1263 }
1264
1265 if (asf->packet_replic_size == 1) {
1266 // frag_offset is here used as the beginning timestamp
1267 asf->packet_frag_timestamp = asf->packet_time_start;
1268 asf->packet_time_start += asf->packet_time_delta;
1269 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1270 asf->packet_size_left--;
1271 asf->packet_multi_size--;
1272 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1273 asf->packet_time_start = 0;
1274 avio_skip(pb, asf->packet_multi_size);
1275 asf->packet_size_left -= asf->packet_multi_size;
1276 continue;
1277 }
1278 asf->packet_multi_size -= asf_st->packet_obj_size;
1279 }
1280
1281 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1282 // FIXME is this condition sufficient?
1283 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1284 int ret;
1285
1286 if (asf_st->pkt.data) {
1287 av_log(s, AV_LOG_INFO,
1288 "freeing incomplete packet size %d, new %d\n",
1289 asf_st->pkt.size, asf_st->packet_obj_size);
1290 asf_st->frag_offset = 0;
1291 av_packet_unref(&asf_st->pkt);
1292 }
1293 /* new packet */
1294 if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1295 return ret;
1296 asf_st->seq = asf->packet_seq;
1297 if (asf->ts_is_pts) {
1298 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1299 } else
1300 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1301 asf_st->pkt.stream_index = asf->stream_index;
1302 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1303 asf_st->pkt_clean = 0;
1304
1305 if (asf_st->pkt.data && asf_st->palette_changed) {
1306 uint8_t *pal;
1307 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1308 AVPALETTE_SIZE);
1309 if (!pal) {
1310 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1311 } else {
1312 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1313 asf_st->palette_changed = 0;
1314 }
1315 }
1316 av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1317 asf->stream_index, asf->packet_key_frame,
1318 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1319 s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO,
1320 asf_st->packet_obj_size);
1321 if (s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
1322 asf->packet_key_frame = 1;
1323 if (asf->packet_key_frame)
1324 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1325 }
1326
1327 /* read data */
1328 av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1329 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1330 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1331 asf->packet_size_left -= asf->packet_frag_size;
1332 if (asf->packet_size_left < 0)
1333 continue;
1334
1335 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1336 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1337 av_log(s, AV_LOG_ERROR,
1338 "packet fragment position invalid %u,%u not in %u\n",
1339 asf->packet_frag_offset, asf->packet_frag_size,
1340 asf_st->pkt.size);
1341 continue;
1342 }
1343
1344 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1345 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1346 asf_st->pkt_clean = 1;
1347 }
1348
1349 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1350 asf->packet_frag_size);
1351 if (ret != asf->packet_frag_size) {
1352 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1353 return ret < 0 ? ret : AVERROR_EOF;
1354
1355 if (asf_st->ds_span > 1) {
1356 // scrambling, we can either drop it completely or fill the remainder
1357 // TODO: should we fill the whole packet instead of just the current
1358 // fragment?
1359 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1360 asf->packet_frag_size - ret);
1361 ret = asf->packet_frag_size;
1362 } else {
1363 // no scrambling, so we can return partial packets
1364 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1365 }
1366 }
1367 if (s->key && s->keylen == 20)
1368 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1369 ret);
1370 asf_st->frag_offset += ret;
1371 /* test if whole packet is read */
1372 if (asf_st->frag_offset == asf_st->pkt.size) {
1373 // workaround for macroshit radio DVR-MS files
1374 if (s->streams[asf->stream_index]->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1375 asf_st->pkt.size > 100) {
1376 int i;
1377 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1378 ;
1379 if (i == asf_st->pkt.size) {
1380 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1381 asf_st->frag_offset = 0;
1382 av_packet_unref(&asf_st->pkt);
1383 continue;
1384 }
1385 }
1386
1387 /* return packet */
1388 if (asf_st->ds_span > 1) {
1389 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1390 av_log(s, AV_LOG_ERROR,
1391 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1392 asf_st->pkt.size, asf_st->ds_packet_size,
1393 asf_st->ds_span);
1394 } else {
1395 /* packet descrambling */
1396 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1397 AV_INPUT_BUFFER_PADDING_SIZE);
1398 if (buf) {
1399 uint8_t *newdata = buf->data;
1400 int offset = 0;
1401 memset(newdata + asf_st->pkt.size, 0,
1402 AV_INPUT_BUFFER_PADDING_SIZE);
1403 while (offset < asf_st->pkt.size) {
1404 int off = offset / asf_st->ds_chunk_size;
1405 int row = off / asf_st->ds_span;
1406 int col = off % asf_st->ds_span;
1407 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1408 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1409 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1410 memcpy(newdata + offset,
1411 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1412 asf_st->ds_chunk_size);
1413 offset += asf_st->ds_chunk_size;
1414 }
1415 av_buffer_unref(&asf_st->pkt.buf);
1416 asf_st->pkt.buf = buf;
1417 asf_st->pkt.data = buf->data;
1418 }
1419 }
1420 }
1421 asf_st->frag_offset = 0;
1422 *pkt = asf_st->pkt;
1423 asf_st->pkt.buf = 0;
1424 asf_st->pkt.size = 0;
1425 asf_st->pkt.data = 0;
1426 asf_st->pkt.side_data_elems = 0;
1427 asf_st->pkt.side_data = NULL;
1428 break; // packet completed
1429 }
1430 }
1431 return 0;
1432}
1433
1434static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1435{
1436 ASFContext *asf = s->priv_data;
1437
1438 for (;;) {
1439 int ret;
1440
1441 /* parse cached packets, if any */
1442 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1443 return ret;
1444 if ((ret = asf_get_packet(s, s->pb)) < 0)
1445 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1446 asf->packet_segments < 1);
1447 asf->packet_time_start = 0;
1448 }
1449}
1450
1451// Added to support seeking after packets have been read
1452// If information is not reset, read_packet fails due to
1453// leftover information from previous reads
1454static void asf_reset_header(AVFormatContext *s)
1455{
1456 ASFContext *asf = s->priv_data;
1457 ASFStream *asf_st;
1458 int i;
1459
1460 asf->packet_size_left = 0;
1461 asf->packet_flags = 0;
1462 asf->packet_property = 0;
1463 asf->packet_timestamp = 0;
1464 asf->packet_segsizetype = 0;
1465 asf->packet_segments = 0;
1466 asf->packet_seq = 0;
1467 asf->packet_replic_size = 0;
1468 asf->packet_key_frame = 0;
1469 asf->packet_padsize = 0;
1470 asf->packet_frag_offset = 0;
1471 asf->packet_frag_size = 0;
1472 asf->packet_frag_timestamp = 0;
1473 asf->packet_multi_size = 0;
1474 asf->packet_time_delta = 0;
1475 asf->packet_time_start = 0;
1476
1477 for (i = 0; i < 128; i++) {
1478 asf_st = &asf->streams[i];
1479 av_packet_unref(&asf_st->pkt);
1480 asf_st->packet_obj_size = 0;
1481 asf_st->frag_offset = 0;
1482 asf_st->seq = 0;
1483 }
1484 asf->asf_st = NULL;
1485}
1486
1487static void skip_to_key(AVFormatContext *s)
1488{
1489 ASFContext *asf = s->priv_data;
1490 int i;
1491
1492 for (i = 0; i < 128; i++) {
1493 int j = asf->asfid2avid[i];
1494 ASFStream *asf_st = &asf->streams[i];
1495 if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1496 continue;
1497
1498 asf_st->skip_to_key = 1;
1499 }
1500}
1501
1502static int asf_read_close(AVFormatContext *s)
1503{
1504 asf_reset_header(s);
1505
1506 return 0;
1507}
1508
1509static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1510 int64_t *ppos, int64_t pos_limit)
1511{
1512 ASFContext *asf = s->priv_data;
1513 AVPacket pkt1, *pkt = &pkt1;
1514 ASFStream *asf_st;
1515 int64_t pts;
1516 int64_t pos = *ppos;
1517 int i;
1518 int64_t start_pos[ASF_MAX_STREAMS];
1519
1520 for (i = 0; i < s->nb_streams; i++)
1521 start_pos[i] = pos;
1522
1523 if (s->packet_size > 0)
1524 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1525 s->packet_size * s->packet_size +
1526 s->internal->data_offset;
1527 *ppos = pos;
1528 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1529 return AV_NOPTS_VALUE;
1530
1531 ff_read_frame_flush(s);
1532 asf_reset_header(s);
1533 for (;;) {
1534 if (av_read_frame(s, pkt) < 0) {
1535 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1536 return AV_NOPTS_VALUE;
1537 }
1538
1539 pts = pkt->dts;
1540
1541 if (pkt->flags & AV_PKT_FLAG_KEY) {
1542 i = pkt->stream_index;
1543
1544 asf_st = &asf->streams[s->streams[i]->id];
1545
1546// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1547 pos = asf_st->packet_pos;
1548 av_assert1(pkt->pos == asf_st->packet_pos);
1549
1550 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1551 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1552 start_pos[i] = asf_st->packet_pos + 1;
1553
1554 if (pkt->stream_index == stream_index) {
1555 av_packet_unref(pkt);
1556 break;
1557 }
1558 }
1559 av_packet_unref(pkt);
1560 }
1561
1562 *ppos = pos;
1563 return pts;
1564}
1565
1566static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1567{
1568 ff_asf_guid g;
1569 ASFContext *asf = s->priv_data;
1570 int64_t current_pos = avio_tell(s->pb);
1571 int64_t ret;
1572
1573 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1574 return ret;
1575 }
1576
1577 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1578 goto end;
1579
1580 /* the data object can be followed by other top-level objects,
1581 * skip them until the simple index object is reached */
1582 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1583 int64_t gsize = avio_rl64(s->pb);
1584 if (gsize < 24 || avio_feof(s->pb)) {
1585 goto end;
1586 }
1587 avio_skip(s->pb, gsize - 24);
1588 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1589 goto end;
1590 }
1591
1592 {
1593 int64_t itime, last_pos = -1;
1594 int pct, ict;
1595 int i;
1596 int64_t av_unused gsize = avio_rl64(s->pb);
1597 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1598 goto end;
1599 itime = avio_rl64(s->pb);
1600 pct = avio_rl32(s->pb);
1601 ict = avio_rl32(s->pb);
1602 av_log(s, AV_LOG_DEBUG,
1603 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1604
1605 for (i = 0; i < ict; i++) {
1606 int pktnum = avio_rl32(s->pb);
1607 int pktct = avio_rl16(s->pb);
1608 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1609 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1610
1611 if (pos != last_pos) {
1612 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1613 pktnum, pktct, index_pts);
1614 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1615 s->packet_size, 0, AVINDEX_KEYFRAME);
1616 last_pos = pos;
1617 }
1618 }
1619 asf->index_read = ict > 1;
1620 }
1621end:
1622// if (avio_feof(s->pb)) {
1623// ret = 0;
1624// }
1625 avio_seek(s->pb, current_pos, SEEK_SET);
1626 return ret;
1627}
1628
1629static int asf_read_seek(AVFormatContext *s, int stream_index,
1630 int64_t pts, int flags)
1631{
1632 ASFContext *asf = s->priv_data;
1633 AVStream *st = s->streams[stream_index];
1634 int ret = 0;
1635
1636 if (s->packet_size <= 0)
1637 return -1;
1638
1639 /* Try using the protocol's read_seek if available */
1640 if (s->pb) {
1641 int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1642 if (ret >= 0)
1643 asf_reset_header(s);
1644 if (ret != AVERROR(ENOSYS))
1645 return ret;
1646 }
1647
1648 /* explicitly handle the case of seeking to 0 */
1649 if (!pts) {
1650 asf_reset_header(s);
1651 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1652 return 0;
1653 }
1654
1655 if (!asf->index_read) {
1656 ret = asf_build_simple_index(s, stream_index);
1657 if (ret < 0)
1658 asf->index_read = -1;
1659 }
1660
1661 if (asf->index_read > 0 && st->index_entries) {
1662 int index = av_index_search_timestamp(st, pts, flags);
1663 if (index >= 0) {
1664 /* find the position */
1665 uint64_t pos = st->index_entries[index].pos;
1666
1667 /* do the seek */
1668 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1669 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1670 return -1;
1671 asf_reset_header(s);
1672 skip_to_key(s);
1673 return 0;
1674 }
1675 }
1676 /* no index or seeking by index failed */
1677 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1678 return -1;
1679 asf_reset_header(s);
1680 skip_to_key(s);
1681 return 0;
1682}
1683
1684AVInputFormat ff_asf_demuxer = {
1685 .name = "asf",
1686 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1687 .priv_data_size = sizeof(ASFContext),
1688 .read_probe = asf_probe,
1689 .read_header = asf_read_header,
1690 .read_packet = asf_read_packet,
1691 .read_close = asf_read_close,
1692 .read_seek = asf_read_seek,
1693 .read_timestamp = asf_read_pts,
1694 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1695 .priv_class = &asf_class,
1696};
1697
generated by cgit at 2024-05-17 06:57:54 (GMT)