1 /*
2 * ASF muxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/mathematics.h"
25 #include "libavutil/opt.h"
26 #include "avformat.h"
27 #include "avlanguage.h"
28 #include "avio_internal.h"
29 #include "internal.h"
30 #include "riff.h"
31 #include "asf.h"
32
33 #define ASF_INDEXED_INTERVAL 10000000
34 #define ASF_INDEX_BLOCK (1<<9)
35 #define ASF_PAYLOADS_PER_PACKET 63
36
37 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
38 #define ASF_PACKET_ERROR_CORRECTION_FLAGS \
39 (ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
40 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE)
41
42 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
43 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
44 #else
45 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
46 #endif
47
48 #define ASF_PPI_PROPERTY_FLAGS \
49 (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
50 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
51 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
52 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE)
53
54 #define ASF_PPI_LENGTH_TYPE_FLAGS 0
55
56 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
57
58 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
59 # define ASF_PPI_SEQUENCE_FIELD_SIZE 1
60 #endif
61 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
62 # define ASF_PPI_SEQUENCE_FIELD_SIZE 2
63 #endif
64 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
65 # define ASF_PPI_SEQUENCE_FIELD_SIZE 4
66 #endif
67 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
68 # define ASF_PPI_SEQUENCE_FIELD_SIZE 0
69 #endif
70
71 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
72 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
73 #endif
74 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
75 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
76 #endif
77 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
78 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
79 #endif
80 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
81 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
82 #endif
83
84 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
85 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
86 #endif
87 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
88 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
89 #endif
90 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
91 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
92 #endif
93 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
94 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
95 #endif
96
97 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
98 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
99 #endif
100 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
101 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
102 #endif
103 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
104 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
105 #endif
106 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
107 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
108 #endif
109
110 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
111 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
112 #endif
113 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
114 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
115 #endif
116 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
117 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
118 #endif
119 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
120 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
121 #endif
122
123 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
124 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
125 #endif
126 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
127 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
128 #endif
129 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
130 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
131 #endif
132 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
133 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
134 #endif
135
136 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
137 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
138 #endif
139 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
140 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
141 #endif
142 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
143 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
144 #endif
145
146 #define PACKET_HEADER_MIN_SIZE \
147 (ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
148 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
149 1 + /* Length Type Flags */ \
150 1 + /* Property Flags */ \
151 ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
152 ASF_PPI_SEQUENCE_FIELD_SIZE + \
153 ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
154 4 + /* Send Time Field */ \
155 2) /* Duration Field */
156
157 // Replicated Data shall be at least 8 bytes long.
158 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
159
160 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
161 (1 + /* Stream Number */ \
162 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
163 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
164 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
165 ASF_PAYLOAD_REPLICATED_DATA_LENGTH)
166
167 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
168 (1 + /* Stream Number */ \
169 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
170 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
171 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
172 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
173 ASF_PAYLOAD_LENGTH_FIELD_SIZE)
174
175 #define SINGLE_PAYLOAD_HEADERS \
176 (PACKET_HEADER_MIN_SIZE + \
177 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD)
178
179 #define MULTI_PAYLOAD_HEADERS \
180 (PACKET_HEADER_MIN_SIZE + \
181 1 + /* Payload Flags */ \
182 2 * PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS)
183
184 #define DATA_HEADER_SIZE 50
185
186 #define PACKET_SIZE_MAX 65536
187 #define PACKET_SIZE_MIN 100
188
189 typedef struct ASFPayload {
190 uint8_t type;
191 uint16_t size;
192 } ASFPayload;
193
194 typedef struct ASFStream {
195 int num;
196 unsigned char seq;
197 /* use for reading */
198 AVPacket pkt;
199 int frag_offset;
200 int packet_obj_size;
201 int timestamp;
202 int64_t duration;
203 int skip_to_key;
204 int pkt_clean;
205
206 int ds_span; /* descrambling */
207 int ds_packet_size;
208 int ds_chunk_size;
209
210 int64_t packet_pos;
211
212 uint16_t stream_language_index;
213
214 int palette_changed;
215 uint32_t palette[256];
216
217 int payload_ext_ct;
218 ASFPayload payload[8];
219 } ASFStream;
220
221 typedef struct ASFContext {
222 AVClass *av_class;
223 uint32_t seqno;
224 int is_streamed;
225 ASFStream streams[128]; ///< it's max number and it's not that big
226 const char *languages[128];
227 int nb_languages;
228 int64_t creation_time;
229 /* non-streamed additional info */
230 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
231 int64_t duration; ///< in 100ns units
232 /* packet filling */
233 unsigned char multi_payloads_present;
234 int packet_size_left;
235 int64_t packet_timestamp_start;
236 int64_t packet_timestamp_end;
237 unsigned int packet_nb_payloads;
238 uint8_t packet_buf[PACKET_SIZE_MAX];
239 AVIOContext pb;
240 /* only for reading */
241 uint64_t data_offset; ///< beginning of the first data packet
242
243 ASFIndex *index_ptr;
244 uint32_t nb_index_memory_alloc;
245 uint16_t maximum_packet;
246 uint32_t next_packet_number;
247 uint16_t next_packet_count;
248 uint64_t next_packet_offset;
249 int next_start_sec;
250 int end_sec;
251 int packet_size;
252 } ASFContext;
253
254 static const AVCodecTag codec_asf_bmp_tags[] = {
255 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
256 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
257 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
258 { AV_CODEC_ID_NONE, 0 },
259 };
260
261 static const AVCodecTag *const asf_codec_tags[] = {
262 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, NULL
263 };
264
265 #define PREROLL_TIME 3100
266
put_str16(AVIOContext * s,const char * tag)267 static void put_str16(AVIOContext *s, const char *tag)
268 {
269 int len;
270 uint8_t *pb;
271 AVIOContext *dyn_buf;
272 if (avio_open_dyn_buf(&dyn_buf) < 0)
273 return;
274
275 avio_put_str16le(dyn_buf, tag);
276 len = avio_close_dyn_buf(dyn_buf, &pb);
277 avio_wl16(s, len);
278 avio_write(s, pb, len);
279 av_freep(&pb);
280 }
281
put_header(AVIOContext * pb,const ff_asf_guid * g)282 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
283 {
284 int64_t pos;
285
286 pos = avio_tell(pb);
287 ff_put_guid(pb, g);
288 avio_wl64(pb, 24);
289 return pos;
290 }
291
292 /* update header size */
end_header(AVIOContext * pb,int64_t pos)293 static void end_header(AVIOContext *pb, int64_t pos)
294 {
295 int64_t pos1;
296
297 pos1 = avio_tell(pb);
298 avio_seek(pb, pos + 16, SEEK_SET);
299 avio_wl64(pb, pos1 - pos);
300 avio_seek(pb, pos1, SEEK_SET);
301 }
302
303 /* write an asf chunk (only used in streaming case) */
put_chunk(AVFormatContext * s,int type,int payload_length,int flags)304 static void put_chunk(AVFormatContext *s, int type,
305 int payload_length, int flags)
306 {
307 ASFContext *asf = s->priv_data;
308 AVIOContext *pb = s->pb;
309 int length;
310
311 length = payload_length + 8;
312 avio_wl16(pb, type);
313 avio_wl16(pb, length); // size
314 avio_wl32(pb, asf->seqno); // sequence number
315 avio_wl16(pb, flags); // unknown bytes
316 avio_wl16(pb, length); // size_confirm
317 asf->seqno++;
318 }
319
320 /* convert from av time to windows time */
unix_to_file_time(int64_t ti)321 static int64_t unix_to_file_time(int64_t ti)
322 {
323 int64_t t;
324
325 t = ti * INT64_C(10);
326 t += INT64_C(116444736000000000);
327 return t;
328 }
329
get_send_time(ASFContext * asf,int64_t pres_time,uint64_t * offset)330 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
331 {
332 int i;
333 int32_t send_time = 0;
334 *offset = asf->data_offset + DATA_HEADER_SIZE;
335 for (i = 0; i < asf->next_start_sec; i++) {
336 if (pres_time <= asf->index_ptr[i].send_time)
337 break;
338 send_time = asf->index_ptr[i].send_time;
339 *offset = asf->index_ptr[i].offset;
340 }
341
342 return send_time / 10000;
343 }
344
asf_write_markers(AVFormatContext * s)345 static int asf_write_markers(AVFormatContext *s)
346 {
347 ASFContext *asf = s->priv_data;
348 AVIOContext *pb = s->pb;
349 int i;
350 AVRational scale = {1, 10000000};
351 int64_t hpos = put_header(pb, &ff_asf_marker_header);
352
353 ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value
354 avio_wl32(pb, s->nb_chapters); // markers count
355 avio_wl16(pb, 0); // ASF spec mandates 0 for this
356 avio_wl16(pb, 0); // name length 0, no name given
357
358 for (i = 0; i < s->nb_chapters; i++) {
359 AVChapter *c = s->chapters[i];
360 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
361 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
362 uint64_t offset;
363 int32_t send_time = get_send_time(asf, pres_time, &offset);
364 int len = 0, ret;
365 uint8_t *buf;
366 AVIOContext *dyn_buf;
367 if (t) {
368 if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
369 return ret;
370 avio_put_str16le(dyn_buf, t->value);
371 len = avio_close_dyn_buf(dyn_buf, &buf);
372 }
373 avio_wl64(pb, offset); // offset of the packet with send_time
374 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
375 avio_wl16(pb, 12 + len); // entry length
376 avio_wl32(pb, send_time); // send time
377 avio_wl32(pb, 0); // flags, should be 0
378 avio_wl32(pb, len / 2); // marker desc length in WCHARS!
379 if (t) {
380 avio_write(pb, buf, len); // marker desc
381 av_freep(&buf);
382 }
383 }
384 end_header(pb, hpos);
385 return 0;
386 }
387
388 /* write the header (used two times if non streamed) */
asf_write_header1(AVFormatContext * s,int64_t file_size,int64_t data_chunk_size)389 static int asf_write_header1(AVFormatContext *s, int64_t file_size,
390 int64_t data_chunk_size)
391 {
392 ASFContext *asf = s->priv_data;
393 AVIOContext *pb = s->pb;
394 AVDictionaryEntry *tags[5];
395 int header_size, n, extra_size, extra_size2, wav_extra_size;
396 int has_title, has_aspect_ratio = 0;
397 int metadata_count;
398 AVCodecParameters *par;
399 int64_t header_offset, cur_pos, hpos;
400 int bit_rate;
401 int64_t duration;
402 int audio_language_counts[128] = { 0 };
403
404 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
405
406 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
407 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
408 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
409 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
410 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
411
412 duration = asf->duration + PREROLL_TIME * 10000;
413 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
414
415 if (!file_size) {
416 if (ff_parse_creation_time_metadata(s, &asf->creation_time, 0) != 0)
417 av_dict_set(&s->metadata, "creation_time", NULL, 0);
418 }
419
420 metadata_count = av_dict_count(s->metadata);
421
422 bit_rate = 0;
423 for (n = 0; n < s->nb_streams; n++) {
424 AVDictionaryEntry *entry;
425 par = s->streams[n]->codecpar;
426
427 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
428
429 bit_rate += par->bit_rate;
430 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
431 && par->sample_aspect_ratio.num > 0
432 && par->sample_aspect_ratio.den > 0)
433 has_aspect_ratio++;
434
435 entry = av_dict_get(s->streams[n]->metadata, "language", NULL, 0);
436 if (entry) {
437 const char *iso6391lang = ff_convert_lang_to(entry->value, AV_LANG_ISO639_1);
438 if (iso6391lang) {
439 int i;
440 for (i = 0; i < asf->nb_languages; i++) {
441 if (!strcmp(asf->languages[i], iso6391lang)) {
442 asf->streams[n].stream_language_index = i;
443 break;
444 }
445 }
446 if (i >= asf->nb_languages) {
447 asf->languages[asf->nb_languages] = iso6391lang;
448 asf->streams[n].stream_language_index = asf->nb_languages;
449 asf->nb_languages++;
450 }
451 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
452 audio_language_counts[asf->streams[n].stream_language_index]++;
453 }
454 } else {
455 asf->streams[n].stream_language_index = 128;
456 }
457 }
458
459 if (asf->is_streamed) {
460 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
461 }
462
463 ff_put_guid(pb, &ff_asf_header);
464 avio_wl64(pb, -1); /* header length, will be patched after */
465 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
466 avio_w8(pb, 1); /* ??? */
467 avio_w8(pb, 2); /* ??? */
468
469 /* file header */
470 header_offset = avio_tell(pb);
471 hpos = put_header(pb, &ff_asf_file_header);
472 ff_put_guid(pb, &ff_asf_my_guid);
473 avio_wl64(pb, file_size);
474 avio_wl64(pb, unix_to_file_time(asf->creation_time));
475 avio_wl64(pb, asf->nb_packets); /* number of packets */
476 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
477 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
478 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
479 avio_wl32(pb, (asf->is_streamed || !(pb->seekable & AVIO_SEEKABLE_NORMAL)) ? 3 : 2); /* ??? */
480 avio_wl32(pb, s->packet_size); /* packet size */
481 avio_wl32(pb, s->packet_size); /* packet size */
482 avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */
483 end_header(pb, hpos);
484
485 /* header_extension */
486 hpos = put_header(pb, &ff_asf_head1_guid);
487 ff_put_guid(pb, &ff_asf_head2_guid);
488 avio_wl16(pb, 6);
489 avio_wl32(pb, 0); /* length, to be filled later */
490 if (asf->nb_languages) {
491 int64_t hpos2;
492 int i;
493 int nb_audio_languages = 0;
494
495 hpos2 = put_header(pb, &ff_asf_language_guid);
496 avio_wl16(pb, asf->nb_languages);
497 for (i = 0; i < asf->nb_languages; i++) {
498 avio_w8(pb, 6);
499 avio_put_str16le(pb, asf->languages[i]);
500 }
501 end_header(pb, hpos2);
502
503 for (i = 0; i < asf->nb_languages; i++)
504 if (audio_language_counts[i])
505 nb_audio_languages++;
506
507 if (nb_audio_languages > 1) {
508 hpos2 = put_header(pb, &ff_asf_group_mutual_exclusion_object);
509 ff_put_guid(pb, &ff_asf_mutex_language);
510 avio_wl16(pb, nb_audio_languages);
511 for (i = 0; i < asf->nb_languages; i++) {
512 if (audio_language_counts[i]) {
513 avio_wl16(pb, audio_language_counts[i]);
514 for (n = 0; n < s->nb_streams; n++)
515 if (asf->streams[n].stream_language_index == i && s->streams[n]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
516 avio_wl16(pb, n + 1);
517 }
518 }
519 end_header(pb, hpos2);
520 }
521
522 for (n = 0; n < s->nb_streams; n++) {
523 int64_t es_pos;
524 if (asf->streams[n].stream_language_index > 127)
525 continue;
526 es_pos = put_header(pb, &ff_asf_extended_stream_properties_object);
527 avio_wl64(pb, 0); /* start time */
528 avio_wl64(pb, 0); /* end time */
529 avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* data bitrate bps */
530 avio_wl32(pb, 5000); /* buffer size ms */
531 avio_wl32(pb, 0); /* initial buffer fullness */
532 avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* peak data bitrate */
533 avio_wl32(pb, 5000); /* maximum buffer size ms */
534 avio_wl32(pb, 0); /* max initial buffer fullness */
535 avio_wl32(pb, 0); /* max object size */
536 avio_wl32(pb, (!asf->is_streamed && (pb->seekable & AVIO_SEEKABLE_NORMAL)) << 1); /* flags - seekable */
537 avio_wl16(pb, n + 1); /* stream number */
538 avio_wl16(pb, asf->streams[n].stream_language_index); /* language id index */
539 avio_wl64(pb, 0); /* avg time per frame */
540 avio_wl16(pb, 0); /* stream name count */
541 avio_wl16(pb, 0); /* payload extension system count */
542 end_header(pb, es_pos);
543 }
544 }
545 if (has_aspect_ratio) {
546 int64_t hpos2;
547 hpos2 = put_header(pb, &ff_asf_metadata_header);
548 avio_wl16(pb, 2 * has_aspect_ratio);
549 for (n = 0; n < s->nb_streams; n++) {
550 par = s->streams[n]->codecpar;
551 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
552 && par->sample_aspect_ratio.num > 0
553 && par->sample_aspect_ratio.den > 0) {
554 AVRational sar = par->sample_aspect_ratio;
555 avio_wl16(pb, 0);
556 // the stream number is set like this below
557 avio_wl16(pb, n + 1);
558 avio_wl16(pb, 26); // name_len
559 avio_wl16(pb, 3); // value_type
560 avio_wl32(pb, 4); // value_len
561 avio_put_str16le(pb, "AspectRatioX");
562 avio_wl32(pb, sar.num);
563 avio_wl16(pb, 0);
564 // the stream number is set like this below
565 avio_wl16(pb, n + 1);
566 avio_wl16(pb, 26); // name_len
567 avio_wl16(pb, 3); // value_type
568 avio_wl32(pb, 4); // value_len
569 avio_put_str16le(pb, "AspectRatioY");
570 avio_wl32(pb, sar.den);
571 }
572 }
573 end_header(pb, hpos2);
574 }
575 {
576 int64_t pos1;
577 pos1 = avio_tell(pb);
578 avio_seek(pb, hpos + 42, SEEK_SET);
579 avio_wl32(pb, pos1 - hpos - 46);
580 avio_seek(pb, pos1, SEEK_SET);
581 }
582 end_header(pb, hpos);
583
584 /* title and other info */
585 if (has_title) {
586 int len, ret;
587 uint8_t *buf;
588 AVIOContext *dyn_buf;
589
590 if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
591 return ret;
592
593 hpos = put_header(pb, &ff_asf_comment_header);
594
595 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
596 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
597 avio_wl16(pb, len);
598 }
599 len = avio_close_dyn_buf(dyn_buf, &buf);
600 avio_write(pb, buf, len);
601 av_freep(&buf);
602 end_header(pb, hpos);
603 }
604 if (metadata_count) {
605 AVDictionaryEntry *tag = NULL;
606 hpos = put_header(pb, &ff_asf_extended_content_header);
607 avio_wl16(pb, metadata_count);
608 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
609 put_str16(pb, tag->key);
610 avio_wl16(pb, 0);
611 put_str16(pb, tag->value);
612 }
613 end_header(pb, hpos);
614 }
615 /* chapters using ASF markers */
616 if (!asf->is_streamed && s->nb_chapters) {
617 int ret;
618 if ((ret = asf_write_markers(s)) < 0)
619 return ret;
620 }
621 /* stream headers */
622 for (n = 0; n < s->nb_streams; n++) {
623 int64_t es_pos;
624 // ASFStream *stream = &asf->streams[n];
625
626 par = s->streams[n]->codecpar;
627 asf->streams[n].num = n + 1;
628 asf->streams[n].seq = 1;
629
630 switch (par->codec_type) {
631 case AVMEDIA_TYPE_AUDIO:
632 wav_extra_size = 0;
633 extra_size = 18 + wav_extra_size;
634 extra_size2 = 8;
635 break;
636 default:
637 case AVMEDIA_TYPE_VIDEO:
638 wav_extra_size = par->extradata_size;
639 extra_size = 0x33 + wav_extra_size;
640 extra_size2 = 0;
641 break;
642 }
643
644 hpos = put_header(pb, &ff_asf_stream_header);
645 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
646 ff_put_guid(pb, &ff_asf_audio_stream);
647 ff_put_guid(pb, &ff_asf_audio_conceal_spread);
648 } else {
649 ff_put_guid(pb, &ff_asf_video_stream);
650 ff_put_guid(pb, &ff_asf_video_conceal_none);
651 }
652 avio_wl64(pb, 0); /* ??? */
653 es_pos = avio_tell(pb);
654 avio_wl32(pb, extra_size); /* wav header len */
655 avio_wl32(pb, extra_size2); /* additional data len */
656 avio_wl16(pb, n + 1); /* stream number */
657 avio_wl32(pb, 0); /* ??? */
658
659 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
660 /* WAVEFORMATEX header */
661 int wavsize = ff_put_wav_header(s, pb, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
662
663 if (wavsize < 0)
664 return -1;
665 if (wavsize != extra_size) {
666 cur_pos = avio_tell(pb);
667 avio_seek(pb, es_pos, SEEK_SET);
668 avio_wl32(pb, wavsize); /* wav header len */
669 avio_seek(pb, cur_pos, SEEK_SET);
670 }
671 /* ERROR Correction */
672 avio_w8(pb, 0x01);
673 if (par->codec_id == AV_CODEC_ID_ADPCM_G726 || !par->block_align) {
674 avio_wl16(pb, 0x0190);
675 avio_wl16(pb, 0x0190);
676 } else {
677 avio_wl16(pb, par->block_align);
678 avio_wl16(pb, par->block_align);
679 }
680 avio_wl16(pb, 0x01);
681 avio_w8(pb, 0x00);
682 } else {
683 avio_wl32(pb, par->width);
684 avio_wl32(pb, par->height);
685 avio_w8(pb, 2); /* ??? */
686 avio_wl16(pb, 40 + par->extradata_size); /* size */
687
688 /* BITMAPINFOHEADER header */
689 ff_put_bmp_header(pb, par, 1, 0, 0);
690 }
691 end_header(pb, hpos);
692 }
693
694 /* media comments */
695
696 hpos = put_header(pb, &ff_asf_codec_comment_header);
697 ff_put_guid(pb, &ff_asf_codec_comment1_header);
698 avio_wl32(pb, s->nb_streams);
699 for (n = 0; n < s->nb_streams; n++) {
700 const AVCodecDescriptor *codec_desc;
701 const char *desc;
702
703 par = s->streams[n]->codecpar;
704 codec_desc = avcodec_descriptor_get(par->codec_id);
705
706 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
707 avio_wl16(pb, 2);
708 else if (par->codec_type == AVMEDIA_TYPE_VIDEO)
709 avio_wl16(pb, 1);
710 else
711 avio_wl16(pb, -1);
712
713 if (par->codec_id == AV_CODEC_ID_WMAV2)
714 desc = "Windows Media Audio V8";
715 else
716 desc = codec_desc ? codec_desc->name : NULL;
717
718 if (desc) {
719 AVIOContext *dyn_buf;
720 uint8_t *buf;
721 int len, ret;
722
723 if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
724 return ret;
725
726 avio_put_str16le(dyn_buf, desc);
727 len = avio_close_dyn_buf(dyn_buf, &buf);
728 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
729
730 avio_write(pb, buf, len);
731 av_freep(&buf);
732 } else
733 avio_wl16(pb, 0);
734
735 avio_wl16(pb, 0); /* no parameters */
736
737 /* id */
738 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
739 avio_wl16(pb, 2);
740 avio_wl16(pb, par->codec_tag);
741 } else {
742 avio_wl16(pb, 4);
743 avio_wl32(pb, par->codec_tag);
744 }
745 if (!par->codec_tag)
746 return -1;
747 }
748 end_header(pb, hpos);
749
750 /* patch the header size fields */
751
752 cur_pos = avio_tell(pb);
753 header_size = cur_pos - header_offset;
754 if (asf->is_streamed) {
755 header_size += 8 + 30 + DATA_HEADER_SIZE;
756
757 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
758 avio_wl16(pb, header_size);
759 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
760 avio_wl16(pb, header_size);
761
762 header_size -= 8 + 30 + DATA_HEADER_SIZE;
763 }
764 header_size += 24 + 6;
765 avio_seek(pb, header_offset - 14, SEEK_SET);
766 avio_wl64(pb, header_size);
767 avio_seek(pb, cur_pos, SEEK_SET);
768
769 /* movie chunk, followed by packets of packet_size */
770 asf->data_offset = cur_pos;
771 ff_put_guid(pb, &ff_asf_data_header);
772 avio_wl64(pb, data_chunk_size);
773 ff_put_guid(pb, &ff_asf_my_guid);
774 avio_wl64(pb, asf->nb_packets); /* nb packets */
775 avio_w8(pb, 1); /* ??? */
776 avio_w8(pb, 1); /* ??? */
777 return 0;
778 }
779
asf_write_header(AVFormatContext * s)780 static int asf_write_header(AVFormatContext *s)
781 {
782 ASFContext *asf = s->priv_data;
783
784 s->packet_size = asf->packet_size;
785 s->max_interleave_delta = 0;
786 asf->nb_packets = 0;
787
788 if (s->nb_streams > 127) {
789 av_log(s, AV_LOG_ERROR, "ASF can only handle 127 streams\n");
790 return AVERROR(EINVAL);
791 }
792
793 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
794 if (!asf->index_ptr)
795 return AVERROR(ENOMEM);
796 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
797 asf->maximum_packet = 0;
798
799 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
800 * data_size - asf->data_offset at the moment this function is done.
801 * It is needed to use asf as a streamable format. */
802 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
803 //av_free(asf);
804 av_freep(&asf->index_ptr);
805 return -1;
806 }
807
808 asf->packet_nb_payloads = 0;
809 asf->packet_timestamp_start = -1;
810 asf->packet_timestamp_end = -1;
811 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
812 NULL, NULL, NULL, NULL);
813
814 if (s->avoid_negative_ts < 0)
815 s->avoid_negative_ts = 1;
816
817 return 0;
818 }
819
asf_write_stream_header(AVFormatContext * s)820 static int asf_write_stream_header(AVFormatContext *s)
821 {
822 ASFContext *asf = s->priv_data;
823
824 asf->is_streamed = 1;
825
826 return asf_write_header(s);
827 }
828
put_payload_parsing_info(AVFormatContext * s,unsigned sendtime,unsigned duration,int nb_payloads,int padsize)829 static int put_payload_parsing_info(AVFormatContext *s,
830 unsigned sendtime, unsigned duration,
831 int nb_payloads, int padsize)
832 {
833 ASFContext *asf = s->priv_data;
834 AVIOContext *pb = s->pb;
835 int ppi_size, i;
836 int64_t start = avio_tell(pb);
837
838 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
839
840 padsize -= PACKET_HEADER_MIN_SIZE;
841 if (asf->multi_payloads_present)
842 padsize--;
843 av_assert0(padsize >= 0);
844
845 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
846 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
847 avio_w8(pb, 0x0);
848
849 if (asf->multi_payloads_present)
850 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
851
852 if (padsize > 0) {
853 if (padsize < 256)
854 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
855 else
856 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
857 }
858 avio_w8(pb, iLengthTypeFlags);
859
860 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
861
862 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
863 avio_wl16(pb, padsize - 2);
864 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
865 avio_w8(pb, padsize - 1);
866
867 avio_wl32(pb, sendtime);
868 avio_wl16(pb, duration);
869 if (asf->multi_payloads_present)
870 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
871
872 ppi_size = avio_tell(pb) - start;
873
874 return ppi_size;
875 }
876
flush_packet(AVFormatContext * s)877 static void flush_packet(AVFormatContext *s)
878 {
879 ASFContext *asf = s->priv_data;
880 int packet_hdr_size, packet_filled_size;
881
882 av_assert0(asf->packet_timestamp_end >= asf->packet_timestamp_start);
883
884 if (asf->is_streamed)
885 put_chunk(s, 0x4424, s->packet_size, 0);
886
887 packet_hdr_size = put_payload_parsing_info(s,
888 asf->packet_timestamp_start,
889 asf->packet_timestamp_end - asf->packet_timestamp_start,
890 asf->packet_nb_payloads,
891 asf->packet_size_left);
892
893 packet_filled_size = asf->packet_size - asf->packet_size_left;
894 av_assert0(packet_hdr_size <= asf->packet_size_left);
895 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
896
897 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
898
899 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
900
901 asf->nb_packets++;
902 asf->packet_nb_payloads = 0;
903 asf->packet_timestamp_start = -1;
904 asf->packet_timestamp_end = -1;
905 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
906 NULL, NULL, NULL, NULL);
907 }
908
put_payload_header(AVFormatContext * s,ASFStream * stream,int64_t presentation_time,int m_obj_size,int m_obj_offset,int payload_len,int flags)909 static void put_payload_header(AVFormatContext *s, ASFStream *stream,
910 int64_t presentation_time, int m_obj_size,
911 int m_obj_offset, int payload_len, int flags)
912 {
913 ASFContext *asf = s->priv_data;
914 AVIOContext *pb = &asf->pb;
915 int val;
916
917 val = stream->num;
918 if (flags & AV_PKT_FLAG_KEY)
919 val |= ASF_PL_FLAG_KEY_FRAME;
920 avio_w8(pb, val);
921
922 avio_w8(pb, stream->seq); // Media object number
923 avio_wl32(pb, m_obj_offset); // Offset Into Media Object
924
925 // Replicated Data shall be at least 8 bytes long.
926 // The first 4 bytes of data shall contain the
927 // Size of the Media Object that the payload belongs to.
928 // The next 4 bytes of data shall contain the
929 // Presentation Time for the media object that the payload belongs to.
930 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
931
932 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
933 avio_wl32(pb, (uint32_t) presentation_time); // Replicated Data - Presentation Time
934
935 if (asf->multi_payloads_present) {
936 avio_wl16(pb, payload_len); // payload length
937 }
938 }
939
put_frame(AVFormatContext * s,ASFStream * stream,AVStream * avst,int64_t timestamp,const uint8_t * buf,int m_obj_size,int flags)940 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
941 int64_t timestamp, const uint8_t *buf,
942 int m_obj_size, int flags)
943 {
944 ASFContext *asf = s->priv_data;
945 int m_obj_offset, payload_len, frag_len1;
946
947 m_obj_offset = 0;
948 while (m_obj_offset < m_obj_size) {
949 payload_len = m_obj_size - m_obj_offset;
950 if (asf->packet_timestamp_start == -1) {
951 const int multi_payload_constant = (asf->packet_size - MULTI_PAYLOAD_HEADERS);
952 asf->multi_payloads_present = (payload_len < multi_payload_constant);
953
954 asf->packet_size_left = asf->packet_size;
955 if (asf->multi_payloads_present) {
956 frag_len1 = multi_payload_constant - 1;
957 } else {
958 frag_len1 = asf->packet_size - SINGLE_PAYLOAD_HEADERS;
959 }
960 asf->packet_timestamp_start = timestamp;
961 } else {
962 // multi payloads
963 frag_len1 = asf->packet_size_left -
964 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -
965 PACKET_HEADER_MIN_SIZE - 1;
966
967 if (frag_len1 < payload_len &&
968 avst->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
969 flush_packet(s);
970 continue;
971 }
972 if (asf->packet_timestamp_start > INT64_MAX - UINT16_MAX ||
973 timestamp > asf->packet_timestamp_start + UINT16_MAX) {
974 flush_packet(s);
975 continue;
976 }
977 }
978 if (frag_len1 > 0) {
979 if (payload_len > frag_len1)
980 payload_len = frag_len1;
981 else if (payload_len == (frag_len1 - 1))
982 payload_len = frag_len1 - 2; // additional byte need to put padding length
983
984 put_payload_header(s, stream, timestamp + PREROLL_TIME,
985 m_obj_size, m_obj_offset, payload_len, flags);
986 avio_write(&asf->pb, buf, payload_len);
987
988 if (asf->multi_payloads_present)
989 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
990 else
991 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
992 asf->packet_timestamp_end = timestamp;
993
994 asf->packet_nb_payloads++;
995 } else {
996 payload_len = 0;
997 }
998 m_obj_offset += payload_len;
999 buf += payload_len;
1000
1001 if (!asf->multi_payloads_present)
1002 flush_packet(s);
1003 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
1004 flush_packet(s);
1005 else if (asf->packet_nb_payloads == ASF_PAYLOADS_PER_PACKET)
1006 flush_packet(s);
1007 }
1008 stream->seq++;
1009 }
1010
update_index(AVFormatContext * s,int start_sec,uint32_t packet_number,uint16_t packet_count,uint64_t packet_offset)1011 static int update_index(AVFormatContext *s, int start_sec,
1012 uint32_t packet_number, uint16_t packet_count,
1013 uint64_t packet_offset)
1014 {
1015 ASFContext *asf = s->priv_data;
1016
1017 if (start_sec > asf->next_start_sec) {
1018 int i;
1019
1020 if (!asf->next_start_sec) {
1021 asf->next_packet_number = packet_number;
1022 asf->next_packet_count = packet_count;
1023 asf->next_packet_offset = packet_offset;
1024 }
1025
1026 if (start_sec > asf->nb_index_memory_alloc) {
1027 int err;
1028 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);
1029 if ((err = av_reallocp_array(&asf->index_ptr,
1030 asf->nb_index_memory_alloc,
1031 sizeof(*asf->index_ptr))) < 0) {
1032 asf->nb_index_memory_alloc = 0;
1033 return err;
1034 }
1035 }
1036 for (i = asf->next_start_sec; i < start_sec; i++) {
1037 asf->index_ptr[i].packet_number = asf->next_packet_number;
1038 asf->index_ptr[i].packet_count = asf->next_packet_count;
1039 asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000);
1040 asf->index_ptr[i].offset = asf->next_packet_offset;
1041
1042 }
1043 }
1044 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);
1045 asf->next_packet_number = packet_number;
1046 asf->next_packet_count = packet_count;
1047 asf->next_packet_offset = packet_offset;
1048 asf->next_start_sec = start_sec;
1049
1050 return 0;
1051 }
1052
asf_write_packet(AVFormatContext * s,AVPacket * pkt)1053 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
1054 {
1055 ASFContext *asf = s->priv_data;
1056 AVIOContext *pb = s->pb;
1057 ASFStream *stream;
1058 AVCodecParameters *par;
1059 uint32_t packet_number;
1060 int64_t pts;
1061 int start_sec;
1062 int flags = pkt->flags;
1063 int ret;
1064 uint64_t offset = avio_tell(pb);
1065
1066 par = s->streams[pkt->stream_index]->codecpar;
1067 stream = &asf->streams[pkt->stream_index];
1068
1069 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
1070 flags &= ~AV_PKT_FLAG_KEY;
1071
1072 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
1073 av_assert0(pts != AV_NOPTS_VALUE);
1074 if ( pts < - PREROLL_TIME
1075 || pts > (INT_MAX-3)/10000LL * ASF_INDEXED_INTERVAL - PREROLL_TIME) {
1076 av_log(s, AV_LOG_ERROR, "input pts %"PRId64" is invalid\n", pts);
1077 return AVERROR(EINVAL);
1078 }
1079 pts *= 10000;
1080 asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);
1081
1082 packet_number = asf->nb_packets;
1083 put_frame(s, stream, s->streams[pkt->stream_index],
1084 pkt->dts, pkt->data, pkt->size, flags);
1085
1086 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)
1087 / ASF_INDEXED_INTERVAL);
1088
1089 /* check index */
1090 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
1091 uint16_t packet_count = asf->nb_packets - packet_number;
1092 ret = update_index(s, start_sec, packet_number, packet_count, offset);
1093 if (ret < 0)
1094 return ret;
1095 }
1096 asf->end_sec = start_sec;
1097
1098 return 0;
1099 }
1100
asf_write_index(AVFormatContext * s,const ASFIndex * index,uint16_t max,uint32_t count)1101 static int asf_write_index(AVFormatContext *s, const ASFIndex *index,
1102 uint16_t max, uint32_t count)
1103 {
1104 AVIOContext *pb = s->pb;
1105 int i;
1106
1107 ff_put_guid(pb, &ff_asf_simple_index_header);
1108 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
1109 ff_put_guid(pb, &ff_asf_my_guid);
1110 avio_wl64(pb, ASF_INDEXED_INTERVAL);
1111 avio_wl32(pb, max);
1112 avio_wl32(pb, count);
1113 for (i = 0; i < count; i++) {
1114 avio_wl32(pb, index[i].packet_number);
1115 avio_wl16(pb, index[i].packet_count);
1116 }
1117
1118 return 0;
1119 }
1120
asf_write_trailer(AVFormatContext * s)1121 static int asf_write_trailer(AVFormatContext *s)
1122 {
1123 ASFContext *asf = s->priv_data;
1124 int64_t file_size, data_size;
1125 int ret;
1126
1127 /* flush the current packet */
1128 if (asf->pb.buf_ptr > asf->pb.buffer)
1129 flush_packet(s);
1130
1131 /* write index */
1132 data_size = avio_tell(s->pb);
1133 if (!asf->is_streamed && asf->next_start_sec) {
1134 if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0)
1135 return ret;
1136 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);
1137 }
1138
1139 if (asf->is_streamed || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1140 put_chunk(s, 0x4524, 0, 0); /* end of stream */
1141 } else {
1142 /* rewrite an updated header */
1143 file_size = avio_tell(s->pb);
1144 avio_seek(s->pb, 0, SEEK_SET);
1145 asf_write_header1(s, file_size, data_size - asf->data_offset);
1146 }
1147
1148 av_freep(&asf->index_ptr);
1149 return 0;
1150 }
1151
1152 static const AVOption asf_options[] = {
1153 { "packet_size", "Packet size", offsetof(ASFContext, packet_size), AV_OPT_TYPE_INT, {.i64 = 3200}, PACKET_SIZE_MIN, PACKET_SIZE_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1154 { NULL },
1155 };
1156
1157 #if CONFIG_ASF_MUXER
1158 static const AVClass asf_muxer_class = {
1159 .class_name = "ASF muxer",
1160 .item_name = av_default_item_name,
1161 .option = asf_options,
1162 .version = LIBAVUTIL_VERSION_INT,
1163 };
1164
1165 AVOutputFormat ff_asf_muxer = {
1166 .name = "asf",
1167 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1168 .mime_type = "video/x-ms-asf",
1169 .extensions = "asf,wmv,wma",
1170 .priv_data_size = sizeof(ASFContext),
1171 .audio_codec = AV_CODEC_ID_WMAV2,
1172 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1173 .write_header = asf_write_header,
1174 .write_packet = asf_write_packet,
1175 .write_trailer = asf_write_trailer,
1176 .flags = AVFMT_GLOBALHEADER,
1177 .codec_tag = asf_codec_tags,
1178 .priv_class = &asf_muxer_class,
1179 };
1180 #endif /* CONFIG_ASF_MUXER */
1181
1182 #if CONFIG_ASF_STREAM_MUXER
1183 static const AVClass asf_stream_muxer_class = {
1184 .class_name = "ASF stream muxer",
1185 .item_name = av_default_item_name,
1186 .option = asf_options,
1187 .version = LIBAVUTIL_VERSION_INT,
1188 };
1189
1190 AVOutputFormat ff_asf_stream_muxer = {
1191 .name = "asf_stream",
1192 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1193 .mime_type = "video/x-ms-asf",
1194 .extensions = "asf,wmv,wma",
1195 .priv_data_size = sizeof(ASFContext),
1196 .audio_codec = AV_CODEC_ID_WMAV2,
1197 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1198 .write_header = asf_write_stream_header,
1199 .write_packet = asf_write_packet,
1200 .write_trailer = asf_write_trailer,
1201 .flags = AVFMT_GLOBALHEADER,
1202 .codec_tag = asf_codec_tags,
1203 .priv_class = &asf_stream_muxer_class,
1204 };
1205 #endif /* CONFIG_ASF_STREAM_MUXER */
1206