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2ba45a60 DM |
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 | ||
42 | typedef struct { | |
43 | const AVClass *class; | |
44 | int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID | |
45 | ASFStream streams[128]; ///< it's max number and it's not that big | |
46 | uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming) | |
47 | AVRational dar[128]; | |
48 | char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US) | |
49 | /* non streamed additonnal info */ | |
50 | /* packet filling */ | |
51 | int packet_size_left; | |
52 | /* only for reading */ | |
53 | uint64_t data_offset; ///< beginning of the first data packet | |
54 | uint64_t data_object_offset; ///< data object offset (excl. GUID & size) | |
55 | uint64_t data_object_size; ///< size of the data object | |
56 | int index_read; | |
57 | ||
58 | ASFMainHeader hdr; | |
59 | ||
60 | int packet_flags; | |
61 | int packet_property; | |
62 | int packet_timestamp; | |
63 | int packet_segsizetype; | |
64 | int packet_segments; | |
65 | int packet_seq; | |
66 | int packet_replic_size; | |
67 | int packet_key_frame; | |
68 | int packet_padsize; | |
69 | unsigned int packet_frag_offset; | |
70 | unsigned int packet_frag_size; | |
71 | int64_t packet_frag_timestamp; | |
72 | int ts_is_pts; | |
73 | int packet_multi_size; | |
74 | int packet_time_delta; | |
75 | int packet_time_start; | |
76 | int64_t packet_pos; | |
77 | ||
78 | int stream_index; | |
79 | ||
80 | ASFStream *asf_st; ///< currently decoded stream | |
81 | ||
82 | int no_resync_search; | |
83 | } ASFContext; | |
84 | ||
85 | static const AVOption options[] = { | |
86 | { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, | |
87 | { NULL }, | |
88 | }; | |
89 | ||
90 | static const AVClass asf_class = { | |
91 | .class_name = "asf demuxer", | |
92 | .item_name = av_default_item_name, | |
93 | .option = options, | |
94 | .version = LIBAVUTIL_VERSION_INT, | |
95 | }; | |
96 | ||
97 | #undef NDEBUG | |
98 | #include <assert.h> | |
99 | ||
100 | #define ASF_MAX_STREAMS 127 | |
101 | #define FRAME_HEADER_SIZE 16 | |
102 | // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large) | |
103 | ||
104 | #ifdef DEBUG | |
105 | static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */ | |
106 | 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 | |
107 | }; | |
108 | ||
109 | #define PRINT_IF_GUID(g, cmp) \ | |
110 | if (!ff_guidcmp(g, &cmp)) \ | |
111 | av_dlog(NULL, "(GUID: %s) ", # cmp) | |
112 | ||
113 | static void print_guid(ff_asf_guid *g) | |
114 | { | |
115 | int i; | |
116 | PRINT_IF_GUID(g, ff_asf_header); | |
117 | else PRINT_IF_GUID(g, ff_asf_file_header); | |
118 | else PRINT_IF_GUID(g, ff_asf_stream_header); | |
119 | else PRINT_IF_GUID(g, ff_asf_audio_stream); | |
120 | else PRINT_IF_GUID(g, ff_asf_audio_conceal_none); | |
121 | else PRINT_IF_GUID(g, ff_asf_video_stream); | |
122 | else PRINT_IF_GUID(g, ff_asf_video_conceal_none); | |
123 | else PRINT_IF_GUID(g, ff_asf_command_stream); | |
124 | else PRINT_IF_GUID(g, ff_asf_comment_header); | |
125 | else PRINT_IF_GUID(g, ff_asf_codec_comment_header); | |
126 | else PRINT_IF_GUID(g, ff_asf_codec_comment1_header); | |
127 | else PRINT_IF_GUID(g, ff_asf_data_header); | |
128 | else PRINT_IF_GUID(g, ff_asf_simple_index_header); | |
129 | else PRINT_IF_GUID(g, ff_asf_head1_guid); | |
130 | else PRINT_IF_GUID(g, ff_asf_head2_guid); | |
131 | else PRINT_IF_GUID(g, ff_asf_my_guid); | |
132 | else PRINT_IF_GUID(g, ff_asf_ext_stream_header); | |
133 | else PRINT_IF_GUID(g, ff_asf_extended_content_header); | |
134 | else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header); | |
135 | else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream); | |
136 | else PRINT_IF_GUID(g, ff_asf_metadata_header); | |
137 | else PRINT_IF_GUID(g, ff_asf_metadata_library_header); | |
138 | else PRINT_IF_GUID(g, ff_asf_marker_header); | |
139 | else PRINT_IF_GUID(g, stream_bitrate_guid); | |
140 | else PRINT_IF_GUID(g, ff_asf_language_guid); | |
141 | else | |
142 | av_dlog(NULL, "(GUID: unknown) "); | |
143 | for (i = 0; i < 16; i++) | |
144 | av_dlog(NULL, " 0x%02x,", (*g)[i]); | |
145 | av_dlog(NULL, "}\n"); | |
146 | } | |
147 | #undef PRINT_IF_GUID | |
148 | #else | |
149 | #define print_guid(g) | |
150 | #endif | |
151 | ||
152 | static int asf_probe(AVProbeData *pd) | |
153 | { | |
154 | /* check file header */ | |
155 | if (!ff_guidcmp(pd->buf, &ff_asf_header)) | |
156 | return AVPROBE_SCORE_MAX; | |
157 | else | |
158 | return 0; | |
159 | } | |
160 | ||
161 | /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object" | |
162 | * but 16 bit for "Metadata Object" and "Metadata Library Object" */ | |
163 | static int get_value(AVIOContext *pb, int type, int type2_size) | |
164 | { | |
165 | switch (type) { | |
166 | case 2: | |
167 | return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb); | |
168 | case 3: | |
169 | return avio_rl32(pb); | |
170 | case 4: | |
171 | return avio_rl64(pb); | |
172 | case 5: | |
173 | return avio_rl16(pb); | |
174 | default: | |
175 | return INT_MIN; | |
176 | } | |
177 | } | |
178 | ||
179 | /* MSDN claims that this should be "compatible with the ID3 frame, APIC", | |
180 | * but in reality this is only loosely similar */ | |
181 | static int asf_read_picture(AVFormatContext *s, int len) | |
182 | { | |
183 | AVPacket pkt = { 0 }; | |
184 | const CodecMime *mime = ff_id3v2_mime_tags; | |
185 | enum AVCodecID id = AV_CODEC_ID_NONE; | |
186 | char mimetype[64]; | |
187 | uint8_t *desc = NULL; | |
188 | AVStream *st = NULL; | |
189 | int ret, type, picsize, desc_len; | |
190 | ||
191 | /* type + picsize + mime + desc */ | |
192 | if (len < 1 + 4 + 2 + 2) { | |
193 | av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len); | |
194 | return AVERROR_INVALIDDATA; | |
195 | } | |
196 | ||
197 | /* picture type */ | |
198 | type = avio_r8(s->pb); | |
199 | len--; | |
200 | if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) { | |
201 | av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type); | |
202 | type = 0; | |
203 | } | |
204 | ||
205 | /* picture data size */ | |
206 | picsize = avio_rl32(s->pb); | |
207 | len -= 4; | |
208 | ||
209 | /* picture MIME type */ | |
210 | len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype)); | |
211 | while (mime->id != AV_CODEC_ID_NONE) { | |
212 | if (!strncmp(mime->str, mimetype, sizeof(mimetype))) { | |
213 | id = mime->id; | |
214 | break; | |
215 | } | |
216 | mime++; | |
217 | } | |
218 | if (id == AV_CODEC_ID_NONE) { | |
219 | av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n", | |
220 | mimetype); | |
221 | return 0; | |
222 | } | |
223 | ||
224 | if (picsize >= len) { | |
225 | av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n", | |
226 | picsize, len); | |
227 | return AVERROR_INVALIDDATA; | |
228 | } | |
229 | ||
230 | /* picture description */ | |
231 | desc_len = (len - picsize) * 2 + 1; | |
232 | desc = av_malloc(desc_len); | |
233 | if (!desc) | |
234 | return AVERROR(ENOMEM); | |
235 | len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len); | |
236 | ||
237 | ret = av_get_packet(s->pb, &pkt, picsize); | |
238 | if (ret < 0) | |
239 | goto fail; | |
240 | ||
241 | st = avformat_new_stream(s, NULL); | |
242 | if (!st) { | |
243 | ret = AVERROR(ENOMEM); | |
244 | goto fail; | |
245 | } | |
246 | st->disposition |= AV_DISPOSITION_ATTACHED_PIC; | |
247 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
248 | st->codec->codec_id = id; | |
249 | st->attached_pic = pkt; | |
250 | st->attached_pic.stream_index = st->index; | |
251 | st->attached_pic.flags |= AV_PKT_FLAG_KEY; | |
252 | ||
253 | if (*desc) | |
254 | av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL); | |
255 | else | |
256 | av_freep(&desc); | |
257 | ||
258 | av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0); | |
259 | ||
260 | return 0; | |
261 | ||
262 | fail: | |
263 | av_freep(&desc); | |
264 | av_free_packet(&pkt); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | static void get_id3_tag(AVFormatContext *s, int len) | |
269 | { | |
270 | ID3v2ExtraMeta *id3v2_extra_meta = NULL; | |
271 | ||
272 | ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len); | |
273 | if (id3v2_extra_meta) | |
274 | ff_id3v2_parse_apic(s, &id3v2_extra_meta); | |
275 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); | |
276 | } | |
277 | ||
278 | static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size) | |
279 | { | |
280 | char *value; | |
281 | int64_t off = avio_tell(s->pb); | |
282 | #define LEN 22 | |
283 | ||
284 | if ((unsigned)len >= (UINT_MAX - LEN) / 2) | |
285 | return; | |
286 | ||
287 | value = av_malloc(2 * len + LEN); | |
288 | if (!value) | |
289 | goto finish; | |
290 | ||
291 | if (type == 0) { // UTF16-LE | |
292 | avio_get_str16le(s->pb, len, value, 2 * len + 1); | |
293 | } else if (type == -1) { // ASCII | |
294 | avio_read(s->pb, value, len); | |
295 | value[len]=0; | |
296 | } else if (type == 1) { // byte array | |
297 | if (!strcmp(key, "WM/Picture")) { // handle cover art | |
298 | asf_read_picture(s, len); | |
299 | } else if (!strcmp(key, "ID3")) { // handle ID3 tag | |
300 | get_id3_tag(s, len); | |
301 | } else { | |
302 | av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key); | |
303 | } | |
304 | goto finish; | |
305 | } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD | |
306 | uint64_t num = get_value(s->pb, type, type2_size); | |
307 | snprintf(value, LEN, "%"PRIu64, num); | |
308 | } else if (type == 6) { // (don't) handle GUID | |
309 | av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key); | |
310 | goto finish; | |
311 | } else { | |
312 | av_log(s, AV_LOG_DEBUG, | |
313 | "Unsupported value type %d in tag %s.\n", type, key); | |
314 | goto finish; | |
315 | } | |
316 | if (*value) | |
317 | av_dict_set(&s->metadata, key, value, 0); | |
318 | ||
319 | finish: | |
320 | av_freep(&value); | |
321 | avio_seek(s->pb, off + len, SEEK_SET); | |
322 | } | |
323 | ||
324 | static int asf_read_file_properties(AVFormatContext *s, int64_t size) | |
325 | { | |
326 | ASFContext *asf = s->priv_data; | |
327 | AVIOContext *pb = s->pb; | |
328 | ||
329 | ff_get_guid(pb, &asf->hdr.guid); | |
330 | asf->hdr.file_size = avio_rl64(pb); | |
331 | asf->hdr.create_time = avio_rl64(pb); | |
332 | avio_rl64(pb); /* number of packets */ | |
333 | asf->hdr.play_time = avio_rl64(pb); | |
334 | asf->hdr.send_time = avio_rl64(pb); | |
335 | asf->hdr.preroll = avio_rl32(pb); | |
336 | asf->hdr.ignore = avio_rl32(pb); | |
337 | asf->hdr.flags = avio_rl32(pb); | |
338 | asf->hdr.min_pktsize = avio_rl32(pb); | |
339 | asf->hdr.max_pktsize = avio_rl32(pb); | |
340 | if (asf->hdr.min_pktsize >= (1U << 29)) | |
341 | return AVERROR_INVALIDDATA; | |
342 | asf->hdr.max_bitrate = avio_rl32(pb); | |
343 | s->packet_size = asf->hdr.max_pktsize; | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | static int asf_read_stream_properties(AVFormatContext *s, int64_t size) | |
349 | { | |
350 | ASFContext *asf = s->priv_data; | |
351 | AVIOContext *pb = s->pb; | |
352 | AVStream *st; | |
353 | ASFStream *asf_st; | |
354 | ff_asf_guid g; | |
355 | enum AVMediaType type; | |
356 | int type_specific_size, sizeX; | |
357 | unsigned int tag1; | |
358 | int64_t pos1, pos2, start_time; | |
359 | int test_for_ext_stream_audio, is_dvr_ms_audio = 0; | |
360 | ||
361 | if (s->nb_streams == ASF_MAX_STREAMS) { | |
362 | av_log(s, AV_LOG_ERROR, "too many streams\n"); | |
363 | return AVERROR(EINVAL); | |
364 | } | |
365 | ||
366 | pos1 = avio_tell(pb); | |
367 | ||
368 | st = avformat_new_stream(s, NULL); | |
369 | if (!st) | |
370 | return AVERROR(ENOMEM); | |
371 | avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ | |
372 | start_time = asf->hdr.preroll; | |
373 | ||
374 | if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming... | |
375 | int64_t fsize = avio_size(pb); | |
376 | if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || | |
377 | FFABS(fsize - (int64_t)asf->hdr.file_size) / (float)FFMIN(fsize, asf->hdr.file_size) < 0.05) | |
378 | st->duration = asf->hdr.play_time / | |
379 | (10000000 / 1000) - start_time; | |
380 | } | |
381 | ff_get_guid(pb, &g); | |
382 | ||
383 | test_for_ext_stream_audio = 0; | |
384 | if (!ff_guidcmp(&g, &ff_asf_audio_stream)) { | |
385 | type = AVMEDIA_TYPE_AUDIO; | |
386 | } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) { | |
387 | type = AVMEDIA_TYPE_VIDEO; | |
388 | } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) { | |
389 | type = AVMEDIA_TYPE_VIDEO; | |
390 | st->codec->codec_id = AV_CODEC_ID_MJPEG; | |
391 | } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) { | |
392 | type = AVMEDIA_TYPE_DATA; | |
393 | } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { | |
394 | test_for_ext_stream_audio = 1; | |
395 | type = AVMEDIA_TYPE_UNKNOWN; | |
396 | } else { | |
397 | return -1; | |
398 | } | |
399 | ff_get_guid(pb, &g); | |
400 | avio_skip(pb, 8); /* total_size */ | |
401 | type_specific_size = avio_rl32(pb); | |
402 | avio_rl32(pb); | |
403 | st->id = avio_rl16(pb) & 0x7f; /* stream id */ | |
404 | // mapping of asf ID to AV stream ID; | |
405 | asf->asfid2avid[st->id] = s->nb_streams - 1; | |
406 | asf_st = &asf->streams[st->id]; | |
407 | ||
408 | avio_rl32(pb); | |
409 | ||
410 | if (test_for_ext_stream_audio) { | |
411 | ff_get_guid(pb, &g); | |
412 | if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) { | |
413 | type = AVMEDIA_TYPE_AUDIO; | |
414 | is_dvr_ms_audio = 1; | |
415 | ff_get_guid(pb, &g); | |
416 | avio_rl32(pb); | |
417 | avio_rl32(pb); | |
418 | avio_rl32(pb); | |
419 | ff_get_guid(pb, &g); | |
420 | avio_rl32(pb); | |
421 | } | |
422 | } | |
423 | ||
424 | st->codec->codec_type = type; | |
425 | if (type == AVMEDIA_TYPE_AUDIO) { | |
426 | int ret = ff_get_wav_header(pb, st->codec, type_specific_size); | |
427 | if (ret < 0) | |
428 | return ret; | |
429 | if (is_dvr_ms_audio) { | |
430 | // codec_id and codec_tag are unreliable in dvr_ms | |
431 | // files. Set them later by probing stream. | |
432 | st->request_probe = 1; | |
433 | st->codec->codec_tag = 0; | |
434 | } | |
435 | if (st->codec->codec_id == AV_CODEC_ID_AAC) | |
436 | st->need_parsing = AVSTREAM_PARSE_NONE; | |
437 | else | |
438 | st->need_parsing = AVSTREAM_PARSE_FULL; | |
439 | /* We have to init the frame size at some point .... */ | |
440 | pos2 = avio_tell(pb); | |
441 | if (size >= (pos2 + 8 - pos1 + 24)) { | |
442 | asf_st->ds_span = avio_r8(pb); | |
443 | asf_st->ds_packet_size = avio_rl16(pb); | |
444 | asf_st->ds_chunk_size = avio_rl16(pb); | |
445 | avio_rl16(pb); // ds_data_size | |
446 | avio_r8(pb); // ds_silence_data | |
447 | } | |
448 | if (asf_st->ds_span > 1) { | |
449 | if (!asf_st->ds_chunk_size || | |
450 | (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) || | |
451 | asf_st->ds_packet_size % asf_st->ds_chunk_size) | |
452 | asf_st->ds_span = 0; // disable descrambling | |
453 | } | |
454 | } else if (type == AVMEDIA_TYPE_VIDEO && | |
455 | size - (avio_tell(pb) - pos1 + 24) >= 51) { | |
456 | avio_rl32(pb); | |
457 | avio_rl32(pb); | |
458 | avio_r8(pb); | |
459 | avio_rl16(pb); /* size */ | |
460 | sizeX = avio_rl32(pb); /* size */ | |
461 | st->codec->width = avio_rl32(pb); | |
462 | st->codec->height = avio_rl32(pb); | |
463 | /* not available for asf */ | |
464 | avio_rl16(pb); /* panes */ | |
465 | st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */ | |
466 | tag1 = avio_rl32(pb); | |
467 | avio_skip(pb, 20); | |
468 | if (sizeX > 40) { | |
469 | st->codec->extradata_size = ffio_limit(pb, sizeX - 40); | |
470 | st->codec->extradata = av_mallocz(st->codec->extradata_size + | |
471 | FF_INPUT_BUFFER_PADDING_SIZE); | |
472 | if (!st->codec->extradata) | |
473 | return AVERROR(ENOMEM); | |
474 | avio_read(pb, st->codec->extradata, st->codec->extradata_size); | |
475 | } | |
476 | ||
477 | /* Extract palette from extradata if bpp <= 8 */ | |
478 | /* This code assumes that extradata contains only palette */ | |
479 | /* This is true for all paletted codecs implemented in libavcodec */ | |
480 | if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { | |
481 | #if HAVE_BIGENDIAN | |
482 | int i; | |
483 | for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++) | |
484 | asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]); | |
485 | #else | |
486 | memcpy(asf_st->palette, st->codec->extradata, | |
487 | FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); | |
488 | #endif | |
489 | asf_st->palette_changed = 1; | |
490 | } | |
491 | ||
492 | st->codec->codec_tag = tag1; | |
493 | st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); | |
494 | if (tag1 == MKTAG('D', 'V', 'R', ' ')) { | |
495 | st->need_parsing = AVSTREAM_PARSE_FULL; | |
496 | /* issue658 contains wrong w/h and MS even puts a fake seq header | |
497 | * with wrong w/h in extradata while a correct one is in the stream. | |
498 | * maximum lameness */ | |
499 | st->codec->width = | |
500 | st->codec->height = 0; | |
501 | av_freep(&st->codec->extradata); | |
502 | st->codec->extradata_size = 0; | |
503 | } | |
504 | if (st->codec->codec_id == AV_CODEC_ID_H264) | |
505 | st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; | |
506 | if (st->codec->codec_id == AV_CODEC_ID_MPEG4) | |
507 | st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; | |
508 | } | |
509 | pos2 = avio_tell(pb); | |
510 | avio_skip(pb, size - (pos2 - pos1 + 24)); | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size) | |
516 | { | |
517 | ASFContext *asf = s->priv_data; | |
518 | AVIOContext *pb = s->pb; | |
519 | ff_asf_guid g; | |
520 | int ext_len, payload_ext_ct, stream_ct, i; | |
521 | uint32_t leak_rate, stream_num; | |
522 | unsigned int stream_languageid_index; | |
523 | ||
524 | avio_rl64(pb); // starttime | |
525 | avio_rl64(pb); // endtime | |
526 | leak_rate = avio_rl32(pb); // leak-datarate | |
527 | avio_rl32(pb); // bucket-datasize | |
528 | avio_rl32(pb); // init-bucket-fullness | |
529 | avio_rl32(pb); // alt-leak-datarate | |
530 | avio_rl32(pb); // alt-bucket-datasize | |
531 | avio_rl32(pb); // alt-init-bucket-fullness | |
532 | avio_rl32(pb); // max-object-size | |
533 | avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) | |
534 | stream_num = avio_rl16(pb); // stream-num | |
535 | ||
536 | stream_languageid_index = avio_rl16(pb); // stream-language-id-index | |
537 | if (stream_num < 128) | |
538 | asf->streams[stream_num].stream_language_index = stream_languageid_index; | |
539 | ||
540 | avio_rl64(pb); // avg frametime in 100ns units | |
541 | stream_ct = avio_rl16(pb); // stream-name-count | |
542 | payload_ext_ct = avio_rl16(pb); // payload-extension-system-count | |
543 | ||
544 | if (stream_num < 128) { | |
545 | asf->stream_bitrates[stream_num] = leak_rate; | |
546 | asf->streams[stream_num].payload_ext_ct = 0; | |
547 | } | |
548 | ||
549 | for (i = 0; i < stream_ct; i++) { | |
550 | avio_rl16(pb); | |
551 | ext_len = avio_rl16(pb); | |
552 | avio_skip(pb, ext_len); | |
553 | } | |
554 | ||
555 | for (i = 0; i < payload_ext_ct; i++) { | |
556 | int size; | |
557 | ff_get_guid(pb, &g); | |
558 | size = avio_rl16(pb); | |
559 | ext_len = avio_rl32(pb); | |
560 | avio_skip(pb, ext_len); | |
561 | if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) { | |
562 | ASFPayload *p = &asf->streams[stream_num].payload[i]; | |
563 | p->type = g[0]; | |
564 | p->size = size; | |
565 | av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size ); | |
566 | asf->streams[stream_num].payload_ext_ct ++; | |
567 | } | |
568 | } | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
573 | static int asf_read_content_desc(AVFormatContext *s, int64_t size) | |
574 | { | |
575 | AVIOContext *pb = s->pb; | |
576 | int len1, len2, len3, len4, len5; | |
577 | ||
578 | len1 = avio_rl16(pb); | |
579 | len2 = avio_rl16(pb); | |
580 | len3 = avio_rl16(pb); | |
581 | len4 = avio_rl16(pb); | |
582 | len5 = avio_rl16(pb); | |
583 | get_tag(s, "title", 0, len1, 32); | |
584 | get_tag(s, "author", 0, len2, 32); | |
585 | get_tag(s, "copyright", 0, len3, 32); | |
586 | get_tag(s, "comment", 0, len4, 32); | |
587 | avio_skip(pb, len5); | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size) | |
593 | { | |
594 | AVIOContext *pb = s->pb; | |
595 | ASFContext *asf = s->priv_data; | |
596 | int desc_count, i, ret; | |
597 | ||
598 | desc_count = avio_rl16(pb); | |
599 | for (i = 0; i < desc_count; i++) { | |
600 | int name_len, value_type, value_len; | |
601 | char name[1024]; | |
602 | ||
603 | name_len = avio_rl16(pb); | |
604 | if (name_len % 2) // must be even, broken lavf versions wrote len-1 | |
605 | name_len += 1; | |
606 | if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) | |
607 | avio_skip(pb, name_len - ret); | |
608 | value_type = avio_rl16(pb); | |
609 | value_len = avio_rl16(pb); | |
610 | if (!value_type && value_len % 2) | |
611 | value_len += 1; | |
612 | /* My sample has that stream set to 0 maybe that mean the container. | |
613 | * ASF stream count starts at 1. I am using 0 to the container value | |
614 | * since it's unused. */ | |
615 | if (!strcmp(name, "AspectRatioX")) | |
616 | asf->dar[0].num = get_value(s->pb, value_type, 32); | |
617 | else if (!strcmp(name, "AspectRatioY")) | |
618 | asf->dar[0].den = get_value(s->pb, value_type, 32); | |
619 | else | |
620 | get_tag(s, name, value_type, value_len, 32); | |
621 | } | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | static int asf_read_language_list(AVFormatContext *s, int64_t size) | |
627 | { | |
628 | AVIOContext *pb = s->pb; | |
629 | ASFContext *asf = s->priv_data; | |
630 | int j, ret; | |
631 | int stream_count = avio_rl16(pb); | |
632 | for (j = 0; j < stream_count; j++) { | |
633 | char lang[6]; | |
634 | unsigned int lang_len = avio_r8(pb); | |
635 | if ((ret = avio_get_str16le(pb, lang_len, lang, | |
636 | sizeof(lang))) < lang_len) | |
637 | avio_skip(pb, lang_len - ret); | |
638 | if (j < 128) | |
639 | av_strlcpy(asf->stream_languages[j], lang, | |
640 | sizeof(*asf->stream_languages)); | |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | static int asf_read_metadata(AVFormatContext *s, int64_t size) | |
647 | { | |
648 | AVIOContext *pb = s->pb; | |
649 | ASFContext *asf = s->priv_data; | |
650 | int n, stream_num, name_len, value_len; | |
651 | int ret, i; | |
652 | n = avio_rl16(pb); | |
653 | ||
654 | for (i = 0; i < n; i++) { | |
655 | char name[1024]; | |
656 | int value_type; | |
657 | ||
658 | avio_rl16(pb); // lang_list_index | |
659 | stream_num = avio_rl16(pb); | |
660 | name_len = avio_rl16(pb); | |
661 | value_type = avio_rl16(pb); /* value_type */ | |
662 | value_len = avio_rl32(pb); | |
663 | ||
664 | if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) | |
665 | avio_skip(pb, name_len - ret); | |
666 | av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n", | |
667 | i, stream_num, name_len, value_type, value_len, name); | |
668 | ||
669 | if (!strcmp(name, "AspectRatioX")){ | |
670 | int aspect_x = get_value(s->pb, value_type, 16); | |
671 | if(stream_num < 128) | |
672 | asf->dar[stream_num].num = aspect_x; | |
673 | } else if(!strcmp(name, "AspectRatioY")){ | |
674 | int aspect_y = get_value(s->pb, value_type, 16); | |
675 | if(stream_num < 128) | |
676 | asf->dar[stream_num].den = aspect_y; | |
677 | } else { | |
678 | get_tag(s, name, value_type, value_len, 16); | |
679 | } | |
680 | } | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | static int asf_read_marker(AVFormatContext *s, int64_t size) | |
686 | { | |
687 | AVIOContext *pb = s->pb; | |
688 | ASFContext *asf = s->priv_data; | |
689 | int i, count, name_len, ret; | |
690 | char name[1024]; | |
691 | ||
692 | avio_rl64(pb); // reserved 16 bytes | |
693 | avio_rl64(pb); // ... | |
694 | count = avio_rl32(pb); // markers count | |
695 | avio_rl16(pb); // reserved 2 bytes | |
696 | name_len = avio_rl16(pb); // name length | |
697 | for (i = 0; i < name_len; i++) | |
698 | avio_r8(pb); // skip the name | |
699 | ||
700 | for (i = 0; i < count; i++) { | |
701 | int64_t pres_time; | |
702 | int name_len; | |
703 | ||
704 | avio_rl64(pb); // offset, 8 bytes | |
705 | pres_time = avio_rl64(pb); // presentation time | |
706 | pres_time -= asf->hdr.preroll * 10000; | |
707 | avio_rl16(pb); // entry length | |
708 | avio_rl32(pb); // send time | |
709 | avio_rl32(pb); // flags | |
710 | name_len = avio_rl32(pb); // name length | |
711 | if ((ret = avio_get_str16le(pb, name_len * 2, name, | |
712 | sizeof(name))) < name_len) | |
713 | avio_skip(pb, name_len - ret); | |
714 | avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time, | |
715 | AV_NOPTS_VALUE, name); | |
716 | } | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | static int asf_read_header(AVFormatContext *s) | |
722 | { | |
723 | ASFContext *asf = s->priv_data; | |
724 | ff_asf_guid g; | |
725 | AVIOContext *pb = s->pb; | |
726 | int i; | |
727 | int64_t gsize; | |
728 | ||
729 | ff_get_guid(pb, &g); | |
730 | if (ff_guidcmp(&g, &ff_asf_header)) | |
731 | return AVERROR_INVALIDDATA; | |
732 | avio_rl64(pb); | |
733 | avio_rl32(pb); | |
734 | avio_r8(pb); | |
735 | avio_r8(pb); | |
736 | memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); | |
737 | ||
738 | for (i = 0; i<128; i++) | |
739 | asf->streams[i].stream_language_index = 128; // invalid stream index means no language info | |
740 | ||
741 | for (;;) { | |
742 | uint64_t gpos = avio_tell(pb); | |
743 | ff_get_guid(pb, &g); | |
744 | gsize = avio_rl64(pb); | |
745 | print_guid(&g); | |
746 | if (!ff_guidcmp(&g, &ff_asf_data_header)) { | |
747 | asf->data_object_offset = avio_tell(pb); | |
748 | /* If not streaming, gsize is not unlimited (how?), | |
749 | * and there is enough space in the file.. */ | |
750 | if (!(asf->hdr.flags & 0x01) && gsize >= 100) | |
751 | asf->data_object_size = gsize - 24; | |
752 | else | |
753 | asf->data_object_size = (uint64_t)-1; | |
754 | break; | |
755 | } | |
756 | if (gsize < 24) | |
757 | return AVERROR_INVALIDDATA; | |
758 | if (!ff_guidcmp(&g, &ff_asf_file_header)) { | |
759 | int ret = asf_read_file_properties(s, gsize); | |
760 | if (ret < 0) | |
761 | return ret; | |
762 | } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) { | |
763 | int ret = asf_read_stream_properties(s, gsize); | |
764 | if (ret < 0) | |
765 | return ret; | |
766 | } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) { | |
767 | asf_read_content_desc(s, gsize); | |
768 | } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) { | |
769 | asf_read_language_list(s, gsize); | |
770 | } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) { | |
771 | asf_read_ext_content_desc(s, gsize); | |
772 | } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) { | |
773 | asf_read_metadata(s, gsize); | |
774 | } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) { | |
775 | asf_read_metadata(s, gsize); | |
776 | } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) { | |
777 | asf_read_ext_stream_properties(s, gsize); | |
778 | ||
779 | // there could be a optional stream properties object to follow | |
780 | // if so the next iteration will pick it up | |
781 | continue; | |
782 | } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) { | |
783 | ff_get_guid(pb, &g); | |
784 | avio_skip(pb, 6); | |
785 | continue; | |
786 | } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) { | |
787 | asf_read_marker(s, gsize); | |
788 | } else if (avio_feof(pb)) { | |
789 | return AVERROR_EOF; | |
790 | } else { | |
791 | if (!s->keylen) { | |
792 | if (!ff_guidcmp(&g, &ff_asf_content_encryption)) { | |
793 | unsigned int len; | |
794 | AVPacket pkt; | |
795 | av_log(s, AV_LOG_WARNING, | |
796 | "DRM protected stream detected, decoding will likely fail!\n"); | |
797 | len= avio_rl32(pb); | |
798 | av_log(s, AV_LOG_DEBUG, "Secret data:\n"); | |
799 | av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt); | |
800 | len= avio_rl32(pb); | |
801 | get_tag(s, "ASF_Protection_Type", -1, len, 32); | |
802 | len= avio_rl32(pb); | |
803 | get_tag(s, "ASF_Key_ID", -1, len, 32); | |
804 | len= avio_rl32(pb); | |
805 | get_tag(s, "ASF_License_URL", -1, len, 32); | |
806 | } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) { | |
807 | av_log(s, AV_LOG_WARNING, | |
808 | "Ext DRM protected stream detected, decoding will likely fail!\n"); | |
809 | av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0); | |
810 | } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) { | |
811 | av_log(s, AV_LOG_INFO, "Digital signature detected!\n"); | |
812 | } | |
813 | } | |
814 | } | |
815 | if (avio_tell(pb) != gpos + gsize) | |
816 | av_log(s, AV_LOG_DEBUG, | |
817 | "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n", | |
818 | avio_tell(pb) - gpos, gsize); | |
819 | avio_seek(pb, gpos + gsize, SEEK_SET); | |
820 | } | |
821 | ff_get_guid(pb, &g); | |
822 | avio_rl64(pb); | |
823 | avio_r8(pb); | |
824 | avio_r8(pb); | |
825 | if (avio_feof(pb)) | |
826 | return AVERROR_EOF; | |
827 | asf->data_offset = avio_tell(pb); | |
828 | asf->packet_size_left = 0; | |
829 | ||
830 | for (i = 0; i < 128; i++) { | |
831 | int stream_num = asf->asfid2avid[i]; | |
832 | if (stream_num >= 0) { | |
833 | AVStream *st = s->streams[stream_num]; | |
834 | if (!st->codec->bit_rate) | |
835 | st->codec->bit_rate = asf->stream_bitrates[i]; | |
836 | if (asf->dar[i].num > 0 && asf->dar[i].den > 0) { | |
837 | av_reduce(&st->sample_aspect_ratio.num, | |
838 | &st->sample_aspect_ratio.den, | |
839 | asf->dar[i].num, asf->dar[i].den, INT_MAX); | |
840 | } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && | |
841 | // Use ASF container value if the stream doesn't set AR. | |
842 | (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) | |
843 | av_reduce(&st->sample_aspect_ratio.num, | |
844 | &st->sample_aspect_ratio.den, | |
845 | asf->dar[0].num, asf->dar[0].den, INT_MAX); | |
846 | ||
847 | av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n", | |
848 | i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den, | |
849 | st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); | |
850 | ||
851 | // copy and convert language codes to the frontend | |
852 | if (asf->streams[i].stream_language_index < 128) { | |
853 | const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; | |
854 | if (rfc1766 && strlen(rfc1766) > 1) { | |
855 | const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any | |
856 | const char *iso6392 = av_convert_lang_to(primary_tag, | |
857 | AV_LANG_ISO639_2_BIBL); | |
858 | if (iso6392) | |
859 | av_dict_set(&st->metadata, "language", iso6392, 0); | |
860 | } | |
861 | } | |
862 | } | |
863 | } | |
864 | ||
865 | ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
870 | #define DO_2BITS(bits, var, defval) \ | |
871 | switch (bits & 3) { \ | |
872 | case 3: \ | |
873 | var = avio_rl32(pb); \ | |
874 | rsize += 4; \ | |
875 | break; \ | |
876 | case 2: \ | |
877 | var = avio_rl16(pb); \ | |
878 | rsize += 2; \ | |
879 | break; \ | |
880 | case 1: \ | |
881 | var = avio_r8(pb); \ | |
882 | rsize++; \ | |
883 | break; \ | |
884 | default: \ | |
885 | var = defval; \ | |
886 | break; \ | |
887 | } | |
888 | ||
889 | /** | |
890 | * Load a single ASF packet into the demuxer. | |
891 | * @param s demux context | |
892 | * @param pb context to read data from | |
893 | * @return 0 on success, <0 on error | |
894 | */ | |
895 | static int asf_get_packet(AVFormatContext *s, AVIOContext *pb) | |
896 | { | |
897 | ASFContext *asf = s->priv_data; | |
898 | uint32_t packet_length, padsize; | |
899 | int rsize = 8; | |
900 | int c, d, e, off; | |
901 | ||
902 | // if we do not know packet size, allow skipping up to 32 kB | |
903 | off = 32768; | |
904 | if (asf->no_resync_search) | |
905 | off = 3; | |
906 | else if (s->packet_size > 0) | |
907 | off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3; | |
908 | ||
909 | c = d = e = -1; | |
910 | while (off-- > 0) { | |
911 | c = d; | |
912 | d = e; | |
913 | e = avio_r8(pb); | |
914 | if (c == 0x82 && !d && !e) | |
915 | break; | |
916 | } | |
917 | ||
918 | if (c != 0x82) { | |
919 | /* This code allows handling of -EAGAIN at packet boundaries (i.e. | |
920 | * if the packet sync code above triggers -EAGAIN). This does not | |
921 | * imply complete -EAGAIN handling support at random positions in | |
922 | * the stream. */ | |
923 | if (pb->error == AVERROR(EAGAIN)) | |
924 | return AVERROR(EAGAIN); | |
925 | if (!avio_feof(pb)) | |
926 | av_log(s, AV_LOG_ERROR, | |
927 | "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb)); | |
928 | } | |
929 | if ((c & 0x8f) == 0x82) { | |
930 | if (d || e) { | |
931 | if (!avio_feof(pb)) | |
932 | av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); | |
933 | return AVERROR_INVALIDDATA; | |
934 | } | |
935 | c = avio_r8(pb); | |
936 | d = avio_r8(pb); | |
937 | rsize += 3; | |
938 | } else if(!avio_feof(pb)) { | |
939 | avio_seek(pb, -1, SEEK_CUR); // FIXME | |
940 | } | |
941 | ||
942 | asf->packet_flags = c; | |
943 | asf->packet_property = d; | |
944 | ||
945 | DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size); | |
946 | DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored | |
947 | DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length | |
948 | ||
949 | // the following checks prevent overflows and infinite loops | |
950 | if (!packet_length || packet_length >= (1U << 29)) { | |
951 | av_log(s, AV_LOG_ERROR, | |
952 | "invalid packet_length %"PRIu32" at:%"PRId64"\n", | |
953 | packet_length, avio_tell(pb)); | |
954 | return AVERROR_INVALIDDATA; | |
955 | } | |
956 | if (padsize >= packet_length) { | |
957 | av_log(s, AV_LOG_ERROR, | |
958 | "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb)); | |
959 | return AVERROR_INVALIDDATA; | |
960 | } | |
961 | ||
962 | asf->packet_timestamp = avio_rl32(pb); | |
963 | avio_rl16(pb); /* duration */ | |
964 | // rsize has at least 11 bytes which have to be present | |
965 | ||
966 | if (asf->packet_flags & 0x01) { | |
967 | asf->packet_segsizetype = avio_r8(pb); | |
968 | rsize++; | |
969 | asf->packet_segments = asf->packet_segsizetype & 0x3f; | |
970 | } else { | |
971 | asf->packet_segments = 1; | |
972 | asf->packet_segsizetype = 0x80; | |
973 | } | |
974 | if (rsize > packet_length - padsize) { | |
975 | asf->packet_size_left = 0; | |
976 | av_log(s, AV_LOG_ERROR, | |
977 | "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n", | |
978 | rsize, packet_length, padsize, avio_tell(pb)); | |
979 | return AVERROR_INVALIDDATA; | |
980 | } | |
981 | asf->packet_size_left = packet_length - padsize - rsize; | |
982 | if (packet_length < asf->hdr.min_pktsize) | |
983 | padsize += asf->hdr.min_pktsize - packet_length; | |
984 | asf->packet_padsize = padsize; | |
985 | av_dlog(s, "packet: size=%d padsize=%d left=%d\n", | |
986 | s->packet_size, asf->packet_padsize, asf->packet_size_left); | |
987 | return 0; | |
988 | } | |
989 | ||
990 | /** | |
991 | * | |
992 | * @return <0 if error | |
993 | */ | |
994 | static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb) | |
995 | { | |
996 | ASFContext *asf = s->priv_data; | |
997 | ASFStream *asfst; | |
998 | int rsize = 1; | |
999 | int num = avio_r8(pb); | |
1000 | int i; | |
1001 | int64_t ts0, ts1 av_unused; | |
1002 | ||
1003 | asf->packet_segments--; | |
1004 | asf->packet_key_frame = num >> 7; | |
1005 | asf->stream_index = asf->asfid2avid[num & 0x7f]; | |
1006 | asfst = &asf->streams[num & 0x7f]; | |
1007 | // sequence should be ignored! | |
1008 | DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); | |
1009 | DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); | |
1010 | DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); | |
1011 | av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n", | |
1012 | asf->packet_key_frame, asf->stream_index, asf->packet_seq, | |
1013 | asf->packet_frag_offset, asf->packet_replic_size); | |
1014 | if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) { | |
1015 | av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size); | |
1016 | return AVERROR_INVALIDDATA; | |
1017 | } | |
1018 | if (asf->packet_replic_size >= 8) { | |
1019 | int64_t end = avio_tell(pb) + asf->packet_replic_size; | |
1020 | AVRational aspect; | |
1021 | asfst->packet_obj_size = avio_rl32(pb); | |
1022 | if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size <= 0) { | |
1023 | av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); | |
1024 | asfst->packet_obj_size = 0; | |
1025 | return AVERROR_INVALIDDATA; | |
1026 | } | |
1027 | asf->packet_frag_timestamp = avio_rl32(pb); // timestamp | |
1028 | ||
1029 | for (i = 0; i < asfst->payload_ext_ct; i++) { | |
1030 | ASFPayload *p = &asfst->payload[i]; | |
1031 | int size = p->size; | |
1032 | int64_t payend; | |
1033 | if (size == 0xFFFF) | |
1034 | size = avio_rl16(pb); | |
1035 | payend = avio_tell(pb) + size; | |
1036 | if (payend > end) { | |
1037 | av_log(s, AV_LOG_ERROR, "too long payload\n"); | |
1038 | break; | |
1039 | } | |
1040 | switch (p->type) { | |
1041 | case 0x50: | |
1042 | // duration = avio_rl16(pb); | |
1043 | break; | |
1044 | case 0x54: | |
1045 | aspect.num = avio_r8(pb); | |
1046 | aspect.den = avio_r8(pb); | |
1047 | if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) { | |
1048 | s->streams[asf->stream_index]->sample_aspect_ratio = aspect; | |
1049 | } | |
1050 | break; | |
1051 | case 0x2A: | |
1052 | avio_skip(pb, 8); | |
1053 | ts0 = avio_rl64(pb); | |
1054 | ts1 = avio_rl64(pb); | |
1055 | if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000; | |
1056 | else asf->packet_frag_timestamp = AV_NOPTS_VALUE; | |
1057 | asf->ts_is_pts = 1; | |
1058 | break; | |
1059 | case 0x5B: | |
1060 | case 0xB7: | |
1061 | case 0xCC: | |
1062 | case 0xC0: | |
1063 | case 0xA0: | |
1064 | //unknown | |
1065 | break; | |
1066 | } | |
1067 | avio_seek(pb, payend, SEEK_SET); | |
1068 | } | |
1069 | ||
1070 | avio_seek(pb, end, SEEK_SET); | |
1071 | rsize += asf->packet_replic_size; // FIXME - check validity | |
1072 | } else if (asf->packet_replic_size == 1) { | |
1073 | // multipacket - frag_offset is beginning timestamp | |
1074 | asf->packet_time_start = asf->packet_frag_offset; | |
1075 | asf->packet_frag_offset = 0; | |
1076 | asf->packet_frag_timestamp = asf->packet_timestamp; | |
1077 | ||
1078 | asf->packet_time_delta = avio_r8(pb); | |
1079 | rsize++; | |
1080 | } else if (asf->packet_replic_size != 0) { | |
1081 | av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", | |
1082 | asf->packet_replic_size); | |
1083 | return AVERROR_INVALIDDATA; | |
1084 | } | |
1085 | if (asf->packet_flags & 0x01) { | |
1086 | DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal | |
1087 | if (rsize > asf->packet_size_left) { | |
1088 | av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n"); | |
1089 | return AVERROR_INVALIDDATA; | |
1090 | } else if (asf->packet_frag_size > asf->packet_size_left - rsize) { | |
1091 | if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) { | |
1092 | av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", | |
1093 | asf->packet_size_left, rsize); | |
1094 | return AVERROR_INVALIDDATA; | |
1095 | } else { | |
1096 | int diff = asf->packet_frag_size - (asf->packet_size_left - rsize); | |
1097 | asf->packet_size_left += diff; | |
1098 | asf->packet_padsize -= diff; | |
1099 | } | |
1100 | } | |
1101 | } else { | |
1102 | asf->packet_frag_size = asf->packet_size_left - rsize; | |
1103 | } | |
1104 | if (asf->packet_replic_size == 1) { | |
1105 | asf->packet_multi_size = asf->packet_frag_size; | |
1106 | if (asf->packet_multi_size > asf->packet_size_left) | |
1107 | return AVERROR_INVALIDDATA; | |
1108 | } | |
1109 | asf->packet_size_left -= rsize; | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | /** | |
1115 | * Parse data from individual ASF packets (which were previously loaded | |
1116 | * with asf_get_packet()). | |
1117 | * @param s demux context | |
1118 | * @param pb context to read data from | |
1119 | * @param pkt pointer to store packet data into | |
1120 | * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF | |
1121 | * packets need to be loaded (through asf_get_packet()) | |
1122 | */ | |
1123 | static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) | |
1124 | { | |
1125 | ASFContext *asf = s->priv_data; | |
1126 | ASFStream *asf_st = 0; | |
1127 | for (;;) { | |
1128 | int ret; | |
1129 | if (avio_feof(pb)) | |
1130 | return AVERROR_EOF; | |
1131 | if (asf->packet_size_left < FRAME_HEADER_SIZE || | |
1132 | asf->packet_segments < 1 && asf->packet_time_start == 0) { | |
1133 | int ret = asf->packet_size_left + asf->packet_padsize; | |
1134 | ||
1135 | assert(ret >= 0); | |
1136 | /* fail safe */ | |
1137 | avio_skip(pb, ret); | |
1138 | ||
1139 | asf->packet_pos = avio_tell(pb); | |
1140 | if (asf->data_object_size != (uint64_t)-1 && | |
1141 | (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) | |
1142 | return AVERROR_EOF; /* Do not exceed the size of the data object */ | |
1143 | return 1; | |
1144 | } | |
1145 | if (asf->packet_time_start == 0) { | |
1146 | if (asf_read_frame_header(s, pb) < 0) { | |
1147 | asf->packet_time_start = asf->packet_segments = 0; | |
1148 | continue; | |
1149 | } | |
1150 | if (asf->stream_index < 0 || | |
1151 | s->streams[asf->stream_index]->discard >= AVDISCARD_ALL || | |
1152 | (!asf->packet_key_frame && | |
1153 | (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) { | |
1154 | asf->packet_time_start = 0; | |
1155 | /* unhandled packet (should not happen) */ | |
1156 | avio_skip(pb, asf->packet_frag_size); | |
1157 | asf->packet_size_left -= asf->packet_frag_size; | |
1158 | if (asf->stream_index < 0) | |
1159 | av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", | |
1160 | asf->packet_frag_size); | |
1161 | continue; | |
1162 | } | |
1163 | asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id]; | |
1164 | asf->asf_st->skip_to_key = 0; | |
1165 | } | |
1166 | asf_st = asf->asf_st; | |
1167 | av_assert0(asf_st); | |
1168 | ||
1169 | if (!asf_st->frag_offset && asf->packet_frag_offset) { | |
1170 | av_dlog(s, "skipping asf data pkt with fragment offset for " | |
1171 | "stream:%d, expected:%d but got %d from pkt)\n", | |
1172 | asf->stream_index, asf_st->frag_offset, | |
1173 | asf->packet_frag_offset); | |
1174 | avio_skip(pb, asf->packet_frag_size); | |
1175 | asf->packet_size_left -= asf->packet_frag_size; | |
1176 | continue; | |
1177 | } | |
1178 | ||
1179 | if (asf->packet_replic_size == 1) { | |
1180 | // frag_offset is here used as the beginning timestamp | |
1181 | asf->packet_frag_timestamp = asf->packet_time_start; | |
1182 | asf->packet_time_start += asf->packet_time_delta; | |
1183 | asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb); | |
1184 | asf->packet_size_left--; | |
1185 | asf->packet_multi_size--; | |
1186 | if (asf->packet_multi_size < asf_st->packet_obj_size) { | |
1187 | asf->packet_time_start = 0; | |
1188 | avio_skip(pb, asf->packet_multi_size); | |
1189 | asf->packet_size_left -= asf->packet_multi_size; | |
1190 | continue; | |
1191 | } | |
1192 | asf->packet_multi_size -= asf_st->packet_obj_size; | |
1193 | } | |
1194 | ||
1195 | if (asf_st->pkt.size != asf_st->packet_obj_size || | |
1196 | // FIXME is this condition sufficient? | |
1197 | asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { | |
1198 | int ret; | |
1199 | ||
1200 | if (asf_st->pkt.data) { | |
1201 | av_log(s, AV_LOG_INFO, | |
1202 | "freeing incomplete packet size %d, new %d\n", | |
1203 | asf_st->pkt.size, asf_st->packet_obj_size); | |
1204 | asf_st->frag_offset = 0; | |
1205 | av_free_packet(&asf_st->pkt); | |
1206 | } | |
1207 | /* new packet */ | |
1208 | if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0) | |
1209 | return ret; | |
1210 | asf_st->seq = asf->packet_seq; | |
1211 | if (asf->ts_is_pts) { | |
1212 | asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll; | |
1213 | } else | |
1214 | asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; | |
1215 | asf_st->pkt.stream_index = asf->stream_index; | |
1216 | asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos; | |
1217 | asf_st->pkt_clean = 0; | |
1218 | ||
1219 | if (asf_st->pkt.data && asf_st->palette_changed) { | |
1220 | uint8_t *pal; | |
1221 | pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE, | |
1222 | AVPALETTE_SIZE); | |
1223 | if (!pal) { | |
1224 | av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n"); | |
1225 | } else { | |
1226 | memcpy(pal, asf_st->palette, AVPALETTE_SIZE); | |
1227 | asf_st->palette_changed = 0; | |
1228 | } | |
1229 | } | |
1230 | av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", | |
1231 | asf->stream_index, asf->packet_key_frame, | |
1232 | asf_st->pkt.flags & AV_PKT_FLAG_KEY, | |
1233 | s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, | |
1234 | asf_st->packet_obj_size); | |
1235 | if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO) | |
1236 | asf->packet_key_frame = 1; | |
1237 | if (asf->packet_key_frame) | |
1238 | asf_st->pkt.flags |= AV_PKT_FLAG_KEY; | |
1239 | } | |
1240 | ||
1241 | /* read data */ | |
1242 | av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", | |
1243 | s->packet_size, asf_st->pkt.size, asf->packet_frag_offset, | |
1244 | asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); | |
1245 | asf->packet_size_left -= asf->packet_frag_size; | |
1246 | if (asf->packet_size_left < 0) | |
1247 | continue; | |
1248 | ||
1249 | if (asf->packet_frag_offset >= asf_st->pkt.size || | |
1250 | asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) { | |
1251 | av_log(s, AV_LOG_ERROR, | |
1252 | "packet fragment position invalid %u,%u not in %u\n", | |
1253 | asf->packet_frag_offset, asf->packet_frag_size, | |
1254 | asf_st->pkt.size); | |
1255 | continue; | |
1256 | } | |
1257 | ||
1258 | if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) { | |
1259 | memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset); | |
1260 | asf_st->pkt_clean = 1; | |
1261 | } | |
1262 | ||
1263 | ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset, | |
1264 | asf->packet_frag_size); | |
1265 | if (ret != asf->packet_frag_size) { | |
1266 | if (ret < 0 || asf->packet_frag_offset + ret == 0) | |
1267 | return ret < 0 ? ret : AVERROR_EOF; | |
1268 | ||
1269 | if (asf_st->ds_span > 1) { | |
1270 | // scrambling, we can either drop it completely or fill the remainder | |
1271 | // TODO: should we fill the whole packet instead of just the current | |
1272 | // fragment? | |
1273 | memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0, | |
1274 | asf->packet_frag_size - ret); | |
1275 | ret = asf->packet_frag_size; | |
1276 | } else { | |
1277 | // no scrambling, so we can return partial packets | |
1278 | av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret); | |
1279 | } | |
1280 | } | |
1281 | if (s->key && s->keylen == 20) | |
1282 | ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, | |
1283 | ret); | |
1284 | asf_st->frag_offset += ret; | |
1285 | /* test if whole packet is read */ | |
1286 | if (asf_st->frag_offset == asf_st->pkt.size) { | |
1287 | // workaround for macroshit radio DVR-MS files | |
1288 | if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && | |
1289 | asf_st->pkt.size > 100) { | |
1290 | int i; | |
1291 | for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++) | |
1292 | ; | |
1293 | if (i == asf_st->pkt.size) { | |
1294 | av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); | |
1295 | asf_st->frag_offset = 0; | |
1296 | av_free_packet(&asf_st->pkt); | |
1297 | continue; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* return packet */ | |
1302 | if (asf_st->ds_span > 1) { | |
1303 | if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) { | |
1304 | av_log(s, AV_LOG_ERROR, | |
1305 | "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", | |
1306 | asf_st->pkt.size, asf_st->ds_packet_size, | |
1307 | asf_st->ds_span); | |
1308 | } else { | |
1309 | /* packet descrambling */ | |
1310 | AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size + | |
1311 | FF_INPUT_BUFFER_PADDING_SIZE); | |
1312 | if (buf) { | |
1313 | uint8_t *newdata = buf->data; | |
1314 | int offset = 0; | |
1315 | memset(newdata + asf_st->pkt.size, 0, | |
1316 | FF_INPUT_BUFFER_PADDING_SIZE); | |
1317 | while (offset < asf_st->pkt.size) { | |
1318 | int off = offset / asf_st->ds_chunk_size; | |
1319 | int row = off / asf_st->ds_span; | |
1320 | int col = off % asf_st->ds_span; | |
1321 | int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; | |
1322 | assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); | |
1323 | assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size); | |
1324 | memcpy(newdata + offset, | |
1325 | asf_st->pkt.data + idx * asf_st->ds_chunk_size, | |
1326 | asf_st->ds_chunk_size); | |
1327 | offset += asf_st->ds_chunk_size; | |
1328 | } | |
1329 | av_buffer_unref(&asf_st->pkt.buf); | |
1330 | asf_st->pkt.buf = buf; | |
1331 | asf_st->pkt.data = buf->data; | |
1332 | } | |
1333 | } | |
1334 | } | |
1335 | asf_st->frag_offset = 0; | |
1336 | *pkt = asf_st->pkt; | |
1337 | #if FF_API_DESTRUCT_PACKET | |
1338 | FF_DISABLE_DEPRECATION_WARNINGS | |
1339 | asf_st->pkt.destruct = NULL; | |
1340 | FF_ENABLE_DEPRECATION_WARNINGS | |
1341 | #endif | |
1342 | asf_st->pkt.buf = 0; | |
1343 | asf_st->pkt.size = 0; | |
1344 | asf_st->pkt.data = 0; | |
1345 | asf_st->pkt.side_data_elems = 0; | |
1346 | asf_st->pkt.side_data = NULL; | |
1347 | break; // packet completed | |
1348 | } | |
1349 | } | |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) | |
1354 | { | |
1355 | ASFContext *asf = s->priv_data; | |
1356 | ||
1357 | for (;;) { | |
1358 | int ret; | |
1359 | ||
1360 | /* parse cached packets, if any */ | |
1361 | if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0) | |
1362 | return ret; | |
1363 | if ((ret = asf_get_packet(s, s->pb)) < 0) | |
1364 | assert(asf->packet_size_left < FRAME_HEADER_SIZE || | |
1365 | asf->packet_segments < 1); | |
1366 | asf->packet_time_start = 0; | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | // Added to support seeking after packets have been read | |
1371 | // If information is not reset, read_packet fails due to | |
1372 | // leftover information from previous reads | |
1373 | static void asf_reset_header(AVFormatContext *s) | |
1374 | { | |
1375 | ASFContext *asf = s->priv_data; | |
1376 | ASFStream *asf_st; | |
1377 | int i; | |
1378 | ||
1379 | asf->packet_size_left = 0; | |
1380 | asf->packet_flags = 0; | |
1381 | asf->packet_property = 0; | |
1382 | asf->packet_timestamp = 0; | |
1383 | asf->packet_segsizetype = 0; | |
1384 | asf->packet_segments = 0; | |
1385 | asf->packet_seq = 0; | |
1386 | asf->packet_replic_size = 0; | |
1387 | asf->packet_key_frame = 0; | |
1388 | asf->packet_padsize = 0; | |
1389 | asf->packet_frag_offset = 0; | |
1390 | asf->packet_frag_size = 0; | |
1391 | asf->packet_frag_timestamp = 0; | |
1392 | asf->packet_multi_size = 0; | |
1393 | asf->packet_time_delta = 0; | |
1394 | asf->packet_time_start = 0; | |
1395 | ||
1396 | for (i = 0; i < 128; i++) { | |
1397 | asf_st = &asf->streams[i]; | |
1398 | av_free_packet(&asf_st->pkt); | |
1399 | asf_st->packet_obj_size = 0; | |
1400 | asf_st->frag_offset = 0; | |
1401 | asf_st->seq = 0; | |
1402 | } | |
1403 | asf->asf_st = NULL; | |
1404 | } | |
1405 | ||
1406 | static void skip_to_key(AVFormatContext *s) | |
1407 | { | |
1408 | ASFContext *asf = s->priv_data; | |
1409 | int i; | |
1410 | ||
1411 | for (i = 0; i < 128; i++) { | |
1412 | int j = asf->asfid2avid[i]; | |
1413 | ASFStream *asf_st = &asf->streams[i]; | |
1414 | if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO) | |
1415 | continue; | |
1416 | ||
1417 | asf_st->skip_to_key = 1; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | static int asf_read_close(AVFormatContext *s) | |
1422 | { | |
1423 | asf_reset_header(s); | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | static int64_t asf_read_pts(AVFormatContext *s, int stream_index, | |
1429 | int64_t *ppos, int64_t pos_limit) | |
1430 | { | |
1431 | ASFContext *asf = s->priv_data; | |
1432 | AVPacket pkt1, *pkt = &pkt1; | |
1433 | ASFStream *asf_st; | |
1434 | int64_t pts; | |
1435 | int64_t pos = *ppos; | |
1436 | int i; | |
1437 | int64_t start_pos[ASF_MAX_STREAMS]; | |
1438 | ||
1439 | for (i = 0; i < s->nb_streams; i++) | |
1440 | start_pos[i] = pos; | |
1441 | ||
1442 | if (s->packet_size > 0) | |
1443 | pos = (pos + s->packet_size - 1 - s->data_offset) / | |
1444 | s->packet_size * s->packet_size + | |
1445 | s->data_offset; | |
1446 | *ppos = pos; | |
1447 | if (avio_seek(s->pb, pos, SEEK_SET) < 0) | |
1448 | return AV_NOPTS_VALUE; | |
1449 | ||
1450 | ff_read_frame_flush(s); | |
1451 | asf_reset_header(s); | |
1452 | for (;;) { | |
1453 | if (av_read_frame(s, pkt) < 0) { | |
1454 | av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); | |
1455 | return AV_NOPTS_VALUE; | |
1456 | } | |
1457 | ||
1458 | pts = pkt->dts; | |
1459 | ||
1460 | av_free_packet(pkt); | |
1461 | if (pkt->flags & AV_PKT_FLAG_KEY) { | |
1462 | i = pkt->stream_index; | |
1463 | ||
1464 | asf_st = &asf->streams[s->streams[i]->id]; | |
1465 | ||
1466 | // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); | |
1467 | pos = asf_st->packet_pos; | |
1468 | ||
1469 | av_add_index_entry(s->streams[i], pos, pts, pkt->size, | |
1470 | pos - start_pos[i] + 1, AVINDEX_KEYFRAME); | |
1471 | start_pos[i] = asf_st->packet_pos + 1; | |
1472 | ||
1473 | if (pkt->stream_index == stream_index) | |
1474 | break; | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | *ppos = pos; | |
1479 | return pts; | |
1480 | } | |
1481 | ||
1482 | static int asf_build_simple_index(AVFormatContext *s, int stream_index) | |
1483 | { | |
1484 | ff_asf_guid g; | |
1485 | ASFContext *asf = s->priv_data; | |
1486 | int64_t current_pos = avio_tell(s->pb); | |
1487 | int ret = 0; | |
1488 | ||
1489 | if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) { | |
1490 | return ret; | |
1491 | } | |
1492 | ||
1493 | if ((ret = ff_get_guid(s->pb, &g)) < 0) | |
1494 | goto end; | |
1495 | ||
1496 | /* the data object can be followed by other top-level objects, | |
1497 | * skip them until the simple index object is reached */ | |
1498 | while (ff_guidcmp(&g, &ff_asf_simple_index_header)) { | |
1499 | int64_t gsize = avio_rl64(s->pb); | |
1500 | if (gsize < 24 || avio_feof(s->pb)) { | |
1501 | goto end; | |
1502 | } | |
1503 | avio_skip(s->pb, gsize - 24); | |
1504 | if ((ret = ff_get_guid(s->pb, &g)) < 0) | |
1505 | goto end; | |
1506 | } | |
1507 | ||
1508 | { | |
1509 | int64_t itime, last_pos = -1; | |
1510 | int pct, ict; | |
1511 | int i; | |
1512 | int64_t av_unused gsize = avio_rl64(s->pb); | |
1513 | if ((ret = ff_get_guid(s->pb, &g)) < 0) | |
1514 | goto end; | |
1515 | itime = avio_rl64(s->pb); | |
1516 | pct = avio_rl32(s->pb); | |
1517 | ict = avio_rl32(s->pb); | |
1518 | av_log(s, AV_LOG_DEBUG, | |
1519 | "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict); | |
1520 | ||
1521 | for (i = 0; i < ict; i++) { | |
1522 | int pktnum = avio_rl32(s->pb); | |
1523 | int pktct = avio_rl16(s->pb); | |
1524 | int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum; | |
1525 | int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0); | |
1526 | ||
1527 | if (pos != last_pos) { | |
1528 | av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", | |
1529 | pktnum, pktct, index_pts); | |
1530 | av_add_index_entry(s->streams[stream_index], pos, index_pts, | |
1531 | s->packet_size, 0, AVINDEX_KEYFRAME); | |
1532 | last_pos = pos; | |
1533 | } | |
1534 | } | |
1535 | asf->index_read = ict > 1; | |
1536 | } | |
1537 | end: | |
1538 | // if (avio_feof(s->pb)) { | |
1539 | // ret = 0; | |
1540 | // } | |
1541 | avio_seek(s->pb, current_pos, SEEK_SET); | |
1542 | return ret; | |
1543 | } | |
1544 | ||
1545 | static int asf_read_seek(AVFormatContext *s, int stream_index, | |
1546 | int64_t pts, int flags) | |
1547 | { | |
1548 | ASFContext *asf = s->priv_data; | |
1549 | AVStream *st = s->streams[stream_index]; | |
1550 | int ret = 0; | |
1551 | ||
1552 | if (s->packet_size <= 0) | |
1553 | return -1; | |
1554 | ||
1555 | /* Try using the protocol's read_seek if available */ | |
1556 | if (s->pb) { | |
1557 | int ret = avio_seek_time(s->pb, stream_index, pts, flags); | |
1558 | if (ret >= 0) | |
1559 | asf_reset_header(s); | |
1560 | if (ret != AVERROR(ENOSYS)) | |
1561 | return ret; | |
1562 | } | |
1563 | ||
1564 | /* explicitly handle the case of seeking to 0 */ | |
1565 | if (!pts) { | |
1566 | asf_reset_header(s); | |
1567 | avio_seek(s->pb, s->data_offset, SEEK_SET); | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | if (!asf->index_read) { | |
1572 | ret = asf_build_simple_index(s, stream_index); | |
1573 | if (ret < 0) | |
1574 | asf->index_read = -1; | |
1575 | } | |
1576 | ||
1577 | if (asf->index_read > 0 && st->index_entries) { | |
1578 | int index = av_index_search_timestamp(st, pts, flags); | |
1579 | if (index >= 0) { | |
1580 | /* find the position */ | |
1581 | uint64_t pos = st->index_entries[index].pos; | |
1582 | ||
1583 | /* do the seek */ | |
1584 | av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); | |
1585 | if(avio_seek(s->pb, pos, SEEK_SET) < 0) | |
1586 | return -1; | |
1587 | asf_reset_header(s); | |
1588 | skip_to_key(s); | |
1589 | return 0; | |
1590 | } | |
1591 | } | |
1592 | /* no index or seeking by index failed */ | |
1593 | if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0) | |
1594 | return -1; | |
1595 | asf_reset_header(s); | |
1596 | skip_to_key(s); | |
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | AVInputFormat ff_asf_demuxer = { | |
1601 | .name = "asf", | |
1602 | .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"), | |
1603 | .priv_data_size = sizeof(ASFContext), | |
1604 | .read_probe = asf_probe, | |
1605 | .read_header = asf_read_header, | |
1606 | .read_packet = asf_read_packet, | |
1607 | .read_close = asf_read_close, | |
1608 | .read_seek = asf_read_seek, | |
1609 | .read_timestamp = asf_read_pts, | |
1610 | .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH, | |
1611 | .priv_class = &asf_class, | |
1612 | }; |