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 #define PREROLL_TIME 3100
262
put_str16(AVIOContext * s,const char * tag)263 static void put_str16(AVIOContext *s, const char *tag)
264 {
265 int len;
266 uint8_t *pb;
267 AVIOContext *dyn_buf;
268 if (avio_open_dyn_buf(&dyn_buf) < 0)
269 return;
270
271 avio_put_str16le(dyn_buf, tag);
272 len = avio_close_dyn_buf(dyn_buf, &pb);
273 avio_wl16(s, len);
274 avio_write(s, pb, len);
275 av_freep(&pb);
276 }
277
put_header(AVIOContext * pb,const ff_asf_guid * g)278 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
279 {
280 int64_t pos;
281
282 pos = avio_tell(pb);
283 ff_put_guid(pb, g);
284 avio_wl64(pb, 24);
285 return pos;
286 }
287
288 /* update header size */
end_header(AVIOContext * pb,int64_t pos)289 static void end_header(AVIOContext *pb, int64_t pos)
290 {
291 int64_t pos1;
292
293 pos1 = avio_tell(pb);
294 avio_seek(pb, pos + 16, SEEK_SET);
295 avio_wl64(pb, pos1 - pos);
296 avio_seek(pb, pos1, SEEK_SET);
297 }
298
299 /* write an asf chunk (only used in streaming case) */
put_chunk(AVFormatContext * s,int type,int payload_length,int flags)300 static void put_chunk(AVFormatContext *s, int type,
301 int payload_length, int flags)
302 {
303 ASFContext *asf = s->priv_data;
304 AVIOContext *pb = s->pb;
305 int length;
306
307 length = payload_length + 8;
308 avio_wl16(pb, type);
309 avio_wl16(pb, length); // size
310 avio_wl32(pb, asf->seqno); // sequence number
311 avio_wl16(pb, flags); // unknown bytes
312 avio_wl16(pb, length); // size_confirm
313 asf->seqno++;
314 }
315
316 /* convert from av time to windows time */
unix_to_file_time(int64_t ti)317 static int64_t unix_to_file_time(int64_t ti)
318 {
319 int64_t t;
320
321 t = ti * INT64_C(10);
322 t += INT64_C(116444736000000000);
323 return t;
324 }
325
get_send_time(ASFContext * asf,int64_t pres_time,uint64_t * offset)326 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
327 {
328 int i;
329 int32_t send_time = 0;
330 *offset = asf->data_offset + DATA_HEADER_SIZE;
331 for (i = 0; i < asf->next_start_sec; i++) {
332 if (pres_time <= asf->index_ptr[i].send_time)
333 break;
334 send_time = asf->index_ptr[i].send_time;
335 *offset = asf->index_ptr[i].offset;
336 }
337
338 return send_time / 10000;
339 }
340
asf_write_markers(AVFormatContext * s)341 static int asf_write_markers(AVFormatContext *s)
342 {
343 ASFContext *asf = s->priv_data;
344 AVIOContext *pb = s->pb;
345 int i;
346 AVRational scale = {1, 10000000};
347 int64_t hpos = put_header(pb, &ff_asf_marker_header);
348
349 ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value
350 avio_wl32(pb, s->nb_chapters); // markers count
351 avio_wl16(pb, 0); // ASF spec mandates 0 for this
352 avio_wl16(pb, 0); // name length 0, no name given
353
354 for (i = 0; i < s->nb_chapters; i++) {
355 AVChapter *c = s->chapters[i];
356 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
357 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
358 uint64_t offset;
359 int32_t send_time = get_send_time(asf, pres_time, &offset);
360 int len = 0, ret;
361 uint8_t *buf;
362 AVIOContext *dyn_buf;
363 if (t) {
364 if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
365 return ret;
366 avio_put_str16le(dyn_buf, t->value);
367 len = avio_close_dyn_buf(dyn_buf, &buf);
368 }
369 avio_wl64(pb, offset); // offset of the packet with send_time
370 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
371 avio_wl16(pb, 12 + len); // entry length
372 avio_wl32(pb, send_time); // send time
373 avio_wl32(pb, 0); // flags, should be 0
374 avio_wl32(pb, len / 2); // marker desc length in WCHARS!
375 if (t) {
376 avio_write(pb, buf, len); // marker desc
377 av_freep(&buf);
378 }
379 }
380 end_header(pb, hpos);
381 return 0;
382 }
383
384 /* write the header (used two times if non streamed) */
asf_write_header1(AVFormatContext * s,int64_t file_size,int64_t data_chunk_size)385 static int asf_write_header1(AVFormatContext *s, int64_t file_size,
386 int64_t data_chunk_size)
387 {
388 ASFContext *asf = s->priv_data;
389 AVIOContext *pb = s->pb;
390 AVDictionaryEntry *tags[5];
391 int header_size, n, extra_size, extra_size2, wav_extra_size;
392 int has_title, has_aspect_ratio = 0;
393 int metadata_count;
394 AVCodecParameters *par;
395 int64_t header_offset, cur_pos, hpos;
396 int bit_rate;
397 int64_t duration;
398 int audio_language_counts[128] = { 0 };
399
400 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
401
402 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
403 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
404 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
405 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
406 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
407
408 duration = asf->duration + PREROLL_TIME * 10000;
409 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
410
411 if (!file_size) {
412 if (ff_parse_creation_time_metadata(s, &asf->creation_time, 0) != 0)
413 av_dict_set(&s->metadata, "creation_time", NULL, 0);
414 }
415
416 metadata_count = av_dict_count(s->metadata);
417
418 bit_rate = 0;
419 for (n = 0; n < s->nb_streams; n++) {
420 AVDictionaryEntry *entry;
421 par = s->streams[n]->codecpar;
422
423 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
424
425 bit_rate += par->bit_rate;
426 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
427 && par->sample_aspect_ratio.num > 0
428 && par->sample_aspect_ratio.den > 0)
429 has_aspect_ratio++;
430
431 entry = av_dict_get(s->streams[n]->metadata, "language", NULL, 0);
432 if (entry) {
433 const char *iso6391lang = ff_convert_lang_to(entry->value, AV_LANG_ISO639_1);
434 if (iso6391lang) {
435 int i;
436 for (i = 0; i < asf->nb_languages; i++) {
437 if (!strcmp(asf->languages[i], iso6391lang)) {
438 asf->streams[n].stream_language_index = i;
439 break;
440 }
441 }
442 if (i >= asf->nb_languages) {
443 asf->languages[asf->nb_languages] = iso6391lang;
444 asf->streams[n].stream_language_index = asf->nb_languages;
445 asf->nb_languages++;
446 }
447 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
448 audio_language_counts[asf->streams[n].stream_language_index]++;
449 }
450 } else {
451 asf->streams[n].stream_language_index = 128;
452 }
453 }
454
455 if (asf->is_streamed) {
456 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
457 }
458
459 ff_put_guid(pb, &ff_asf_header);
460 avio_wl64(pb, -1); /* header length, will be patched after */
461 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
462 avio_w8(pb, 1); /* ??? */
463 avio_w8(pb, 2); /* ??? */
464
465 /* file header */
466 header_offset = avio_tell(pb);
467 hpos = put_header(pb, &ff_asf_file_header);
468 ff_put_guid(pb, &ff_asf_my_guid);
469 avio_wl64(pb, file_size);
470 avio_wl64(pb, unix_to_file_time(asf->creation_time));
471 avio_wl64(pb, asf->nb_packets); /* number of packets */
472 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
473 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
474 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
475 avio_wl32(pb, (asf->is_streamed || !(pb->seekable & AVIO_SEEKABLE_NORMAL)) ? 3 : 2); /* ??? */
476 avio_wl32(pb, s->packet_size); /* packet size */
477 avio_wl32(pb, s->packet_size); /* packet size */
478 avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */
479 end_header(pb, hpos);
480
481 /* header_extension */
482 hpos = put_header(pb, &ff_asf_head1_guid);
483 ff_put_guid(pb, &ff_asf_head2_guid);
484 avio_wl16(pb, 6);
485 avio_wl32(pb, 0); /* length, to be filled later */
486 if (asf->nb_languages) {
487 int64_t hpos2;
488 int i;
489 int nb_audio_languages = 0;
490
491 hpos2 = put_header(pb, &ff_asf_language_guid);
492 avio_wl16(pb, asf->nb_languages);
493 for (i = 0; i < asf->nb_languages; i++) {
494 avio_w8(pb, 6);
495 avio_put_str16le(pb, asf->languages[i]);
496 }
497 end_header(pb, hpos2);
498
499 for (i = 0; i < asf->nb_languages; i++)
500 if (audio_language_counts[i])
501 nb_audio_languages++;
502
503 if (nb_audio_languages > 1) {
504 hpos2 = put_header(pb, &ff_asf_group_mutual_exclusion_object);
505 ff_put_guid(pb, &ff_asf_mutex_language);
506 avio_wl16(pb, nb_audio_languages);
507 for (i = 0; i < asf->nb_languages; i++) {
508 if (audio_language_counts[i]) {
509 avio_wl16(pb, audio_language_counts[i]);
510 for (n = 0; n < s->nb_streams; n++)
511 if (asf->streams[n].stream_language_index == i && s->streams[n]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
512 avio_wl16(pb, n + 1);
513 }
514 }
515 end_header(pb, hpos2);
516 }
517
518 for (n = 0; n < s->nb_streams; n++) {
519 int64_t es_pos;
520 if (asf->streams[n].stream_language_index > 127)
521 continue;
522 es_pos = put_header(pb, &ff_asf_extended_stream_properties_object);
523 avio_wl64(pb, 0); /* start time */
524 avio_wl64(pb, 0); /* end time */
525 avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* data bitrate bps */
526 avio_wl32(pb, 5000); /* buffer size ms */
527 avio_wl32(pb, 0); /* initial buffer fullness */
528 avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* peak data bitrate */
529 avio_wl32(pb, 5000); /* maximum buffer size ms */
530 avio_wl32(pb, 0); /* max initial buffer fullness */
531 avio_wl32(pb, 0); /* max object size */
532 avio_wl32(pb, (!asf->is_streamed && (pb->seekable & AVIO_SEEKABLE_NORMAL)) << 1); /* flags - seekable */
533 avio_wl16(pb, n + 1); /* stream number */
534 avio_wl16(pb, asf->streams[n].stream_language_index); /* language id index */
535 avio_wl64(pb, 0); /* avg time per frame */
536 avio_wl16(pb, 0); /* stream name count */
537 avio_wl16(pb, 0); /* payload extension system count */
538 end_header(pb, es_pos);
539 }
540 }
541 if (has_aspect_ratio) {
542 int64_t hpos2;
543 hpos2 = put_header(pb, &ff_asf_metadata_header);
544 avio_wl16(pb, 2 * has_aspect_ratio);
545 for (n = 0; n < s->nb_streams; n++) {
546 par = s->streams[n]->codecpar;
547 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
548 && par->sample_aspect_ratio.num > 0
549 && par->sample_aspect_ratio.den > 0) {
550 AVRational sar = par->sample_aspect_ratio;
551 avio_wl16(pb, 0);
552 // the stream number is set like this below
553 avio_wl16(pb, n + 1);
554 avio_wl16(pb, 26); // name_len
555 avio_wl16(pb, 3); // value_type
556 avio_wl32(pb, 4); // value_len
557 avio_put_str16le(pb, "AspectRatioX");
558 avio_wl32(pb, sar.num);
559 avio_wl16(pb, 0);
560 // the stream number is set like this below
561 avio_wl16(pb, n + 1);
562 avio_wl16(pb, 26); // name_len
563 avio_wl16(pb, 3); // value_type
564 avio_wl32(pb, 4); // value_len
565 avio_put_str16le(pb, "AspectRatioY");
566 avio_wl32(pb, sar.den);
567 }
568 }
569 end_header(pb, hpos2);
570 }
571 {
572 int64_t pos1;
573 pos1 = avio_tell(pb);
574 avio_seek(pb, hpos + 42, SEEK_SET);
575 avio_wl32(pb, pos1 - hpos - 46);
576 avio_seek(pb, pos1, SEEK_SET);
577 }
578 end_header(pb, hpos);
579
580 /* title and other info */
581 if (has_title) {
582 int len, ret;
583 uint8_t *buf;
584 AVIOContext *dyn_buf;
585
586 if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
587 return ret;
588
589 hpos = put_header(pb, &ff_asf_comment_header);
590
591 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
592 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
593 avio_wl16(pb, len);
594 }
595 len = avio_close_dyn_buf(dyn_buf, &buf);
596 avio_write(pb, buf, len);
597 av_freep(&buf);
598 end_header(pb, hpos);
599 }
600 if (metadata_count) {
601 AVDictionaryEntry *tag = NULL;
602 hpos = put_header(pb, &ff_asf_extended_content_header);
603 avio_wl16(pb, metadata_count);
604 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
605 put_str16(pb, tag->key);
606 avio_wl16(pb, 0);
607 put_str16(pb, tag->value);
608 }
609 end_header(pb, hpos);
610 }
611 /* chapters using ASF markers */
612 if (!asf->is_streamed && s->nb_chapters) {
613 int ret;
614 if ((ret = asf_write_markers(s)) < 0)
615 return ret;
616 }
617 /* stream headers */
618 for (n = 0; n < s->nb_streams; n++) {
619 int64_t es_pos;
620 // ASFStream *stream = &asf->streams[n];
621
622 par = s->streams[n]->codecpar;
623 asf->streams[n].num = n + 1;
624 asf->streams[n].seq = 1;
625
626 switch (par->codec_type) {
627 case AVMEDIA_TYPE_AUDIO:
628 wav_extra_size = 0;
629 extra_size = 18 + wav_extra_size;
630 extra_size2 = 8;
631 break;
632 default:
633 case AVMEDIA_TYPE_VIDEO:
634 wav_extra_size = par->extradata_size;
635 extra_size = 0x33 + wav_extra_size;
636 extra_size2 = 0;
637 break;
638 }
639
640 hpos = put_header(pb, &ff_asf_stream_header);
641 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
642 ff_put_guid(pb, &ff_asf_audio_stream);
643 ff_put_guid(pb, &ff_asf_audio_conceal_spread);
644 } else {
645 ff_put_guid(pb, &ff_asf_video_stream);
646 ff_put_guid(pb, &ff_asf_video_conceal_none);
647 }
648 avio_wl64(pb, 0); /* ??? */
649 es_pos = avio_tell(pb);
650 avio_wl32(pb, extra_size); /* wav header len */
651 avio_wl32(pb, extra_size2); /* additional data len */
652 avio_wl16(pb, n + 1); /* stream number */
653 avio_wl32(pb, 0); /* ??? */
654
655 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
656 /* WAVEFORMATEX header */
657 int wavsize = ff_put_wav_header(s, pb, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
658
659 if (wavsize < 0)
660 return -1;
661 if (wavsize != extra_size) {
662 cur_pos = avio_tell(pb);
663 avio_seek(pb, es_pos, SEEK_SET);
664 avio_wl32(pb, wavsize); /* wav header len */
665 avio_seek(pb, cur_pos, SEEK_SET);
666 }
667 /* ERROR Correction */
668 avio_w8(pb, 0x01);
669 if (par->codec_id == AV_CODEC_ID_ADPCM_G726 || !par->block_align) {
670 avio_wl16(pb, 0x0190);
671 avio_wl16(pb, 0x0190);
672 } else {
673 avio_wl16(pb, par->block_align);
674 avio_wl16(pb, par->block_align);
675 }
676 avio_wl16(pb, 0x01);
677 avio_w8(pb, 0x00);
678 } else {
679 avio_wl32(pb, par->width);
680 avio_wl32(pb, par->height);
681 avio_w8(pb, 2); /* ??? */
682 avio_wl16(pb, 40 + par->extradata_size); /* size */
683
684 /* BITMAPINFOHEADER header */
685 ff_put_bmp_header(pb, par, 1, 0);
686 }
687 end_header(pb, hpos);
688 }
689
690 /* media comments */
691
692 hpos = put_header(pb, &ff_asf_codec_comment_header);
693 ff_put_guid(pb, &ff_asf_codec_comment1_header);
694 avio_wl32(pb, s->nb_streams);
695 for (n = 0; n < s->nb_streams; n++) {
696 const AVCodecDescriptor *codec_desc;
697 const char *desc;
698
699 par = s->streams[n]->codecpar;
700 codec_desc = avcodec_descriptor_get(par->codec_id);
701
702 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
703 avio_wl16(pb, 2);
704 else if (par->codec_type == AVMEDIA_TYPE_VIDEO)
705 avio_wl16(pb, 1);
706 else
707 avio_wl16(pb, -1);
708
709 if (par->codec_id == AV_CODEC_ID_WMAV2)
710 desc = "Windows Media Audio V8";
711 else
712 desc = codec_desc ? codec_desc->name : NULL;
713
714 if (desc) {
715 AVIOContext *dyn_buf;
716 uint8_t *buf;
717 int len, ret;
718
719 if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
720 return ret;
721
722 avio_put_str16le(dyn_buf, desc);
723 len = avio_close_dyn_buf(dyn_buf, &buf);
724 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
725
726 avio_write(pb, buf, len);
727 av_freep(&buf);
728 } else
729 avio_wl16(pb, 0);
730
731 avio_wl16(pb, 0); /* no parameters */
732
733 /* id */
734 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
735 avio_wl16(pb, 2);
736 avio_wl16(pb, par->codec_tag);
737 } else {
738 avio_wl16(pb, 4);
739 avio_wl32(pb, par->codec_tag);
740 }
741 if (!par->codec_tag)
742 return -1;
743 }
744 end_header(pb, hpos);
745
746 /* patch the header size fields */
747
748 cur_pos = avio_tell(pb);
749 header_size = cur_pos - header_offset;
750 if (asf->is_streamed) {
751 header_size += 8 + 30 + DATA_HEADER_SIZE;
752
753 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
754 avio_wl16(pb, header_size);
755 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
756 avio_wl16(pb, header_size);
757
758 header_size -= 8 + 30 + DATA_HEADER_SIZE;
759 }
760 header_size += 24 + 6;
761 avio_seek(pb, header_offset - 14, SEEK_SET);
762 avio_wl64(pb, header_size);
763 avio_seek(pb, cur_pos, SEEK_SET);
764
765 /* movie chunk, followed by packets of packet_size */
766 asf->data_offset = cur_pos;
767 ff_put_guid(pb, &ff_asf_data_header);
768 avio_wl64(pb, data_chunk_size);
769 ff_put_guid(pb, &ff_asf_my_guid);
770 avio_wl64(pb, asf->nb_packets); /* nb packets */
771 avio_w8(pb, 1); /* ??? */
772 avio_w8(pb, 1); /* ??? */
773 return 0;
774 }
775
asf_write_header(AVFormatContext * s)776 static int asf_write_header(AVFormatContext *s)
777 {
778 ASFContext *asf = s->priv_data;
779
780 s->packet_size = asf->packet_size;
781 s->max_interleave_delta = 0;
782 asf->nb_packets = 0;
783
784 if (s->nb_streams > 127) {
785 av_log(s, AV_LOG_ERROR, "ASF can only handle 127 streams\n");
786 return AVERROR(EINVAL);
787 }
788
789 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
790 if (!asf->index_ptr)
791 return AVERROR(ENOMEM);
792 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
793 asf->maximum_packet = 0;
794
795 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
796 * data_size - asf->data_offset at the moment this function is done.
797 * It is needed to use asf as a streamable format. */
798 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
799 //av_free(asf);
800 av_freep(&asf->index_ptr);
801 return -1;
802 }
803
804 asf->packet_nb_payloads = 0;
805 asf->packet_timestamp_start = -1;
806 asf->packet_timestamp_end = -1;
807 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
808 NULL, NULL, NULL, NULL);
809
810 if (s->avoid_negative_ts < 0)
811 s->avoid_negative_ts = 1;
812
813 return 0;
814 }
815
asf_write_stream_header(AVFormatContext * s)816 static int asf_write_stream_header(AVFormatContext *s)
817 {
818 ASFContext *asf = s->priv_data;
819
820 asf->is_streamed = 1;
821
822 return asf_write_header(s);
823 }
824
put_payload_parsing_info(AVFormatContext * s,unsigned sendtime,unsigned duration,int nb_payloads,int padsize)825 static int put_payload_parsing_info(AVFormatContext *s,
826 unsigned sendtime, unsigned duration,
827 int nb_payloads, int padsize)
828 {
829 ASFContext *asf = s->priv_data;
830 AVIOContext *pb = s->pb;
831 int ppi_size, i;
832 int64_t start = avio_tell(pb);
833
834 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
835
836 padsize -= PACKET_HEADER_MIN_SIZE;
837 if (asf->multi_payloads_present)
838 padsize--;
839 av_assert0(padsize >= 0);
840
841 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
842 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
843 avio_w8(pb, 0x0);
844
845 if (asf->multi_payloads_present)
846 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
847
848 if (padsize > 0) {
849 if (padsize < 256)
850 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
851 else
852 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
853 }
854 avio_w8(pb, iLengthTypeFlags);
855
856 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
857
858 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
859 avio_wl16(pb, padsize - 2);
860 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
861 avio_w8(pb, padsize - 1);
862
863 avio_wl32(pb, sendtime);
864 avio_wl16(pb, duration);
865 if (asf->multi_payloads_present)
866 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
867
868 ppi_size = avio_tell(pb) - start;
869
870 return ppi_size;
871 }
872
flush_packet(AVFormatContext * s)873 static void flush_packet(AVFormatContext *s)
874 {
875 ASFContext *asf = s->priv_data;
876 int packet_hdr_size, packet_filled_size;
877
878 av_assert0(asf->packet_timestamp_end >= asf->packet_timestamp_start);
879
880 if (asf->is_streamed)
881 put_chunk(s, 0x4424, s->packet_size, 0);
882
883 packet_hdr_size = put_payload_parsing_info(s,
884 asf->packet_timestamp_start,
885 asf->packet_timestamp_end - asf->packet_timestamp_start,
886 asf->packet_nb_payloads,
887 asf->packet_size_left);
888
889 packet_filled_size = asf->packet_size - asf->packet_size_left;
890 av_assert0(packet_hdr_size <= asf->packet_size_left);
891 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
892
893 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
894
895 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
896
897 asf->nb_packets++;
898 asf->packet_nb_payloads = 0;
899 asf->packet_timestamp_start = -1;
900 asf->packet_timestamp_end = -1;
901 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
902 NULL, NULL, NULL, NULL);
903 }
904
put_payload_header(AVFormatContext * s,ASFStream * stream,int64_t presentation_time,int m_obj_size,int m_obj_offset,int payload_len,int flags)905 static void put_payload_header(AVFormatContext *s, ASFStream *stream,
906 int64_t presentation_time, int m_obj_size,
907 int m_obj_offset, int payload_len, int flags)
908 {
909 ASFContext *asf = s->priv_data;
910 AVIOContext *pb = &asf->pb;
911 int val;
912
913 val = stream->num;
914 if (flags & AV_PKT_FLAG_KEY)
915 val |= ASF_PL_FLAG_KEY_FRAME;
916 avio_w8(pb, val);
917
918 avio_w8(pb, stream->seq); // Media object number
919 avio_wl32(pb, m_obj_offset); // Offset Into Media Object
920
921 // Replicated Data shall be at least 8 bytes long.
922 // The first 4 bytes of data shall contain the
923 // Size of the Media Object that the payload belongs to.
924 // The next 4 bytes of data shall contain the
925 // Presentation Time for the media object that the payload belongs to.
926 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
927
928 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
929 avio_wl32(pb, (uint32_t) presentation_time); // Replicated Data - Presentation Time
930
931 if (asf->multi_payloads_present) {
932 avio_wl16(pb, payload_len); // payload length
933 }
934 }
935
put_frame(AVFormatContext * s,ASFStream * stream,AVStream * avst,int64_t timestamp,const uint8_t * buf,int m_obj_size,int flags)936 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
937 int64_t timestamp, const uint8_t *buf,
938 int m_obj_size, int flags)
939 {
940 ASFContext *asf = s->priv_data;
941 int m_obj_offset, payload_len, frag_len1;
942
943 m_obj_offset = 0;
944 while (m_obj_offset < m_obj_size) {
945 payload_len = m_obj_size - m_obj_offset;
946 if (asf->packet_timestamp_start == -1) {
947 const int multi_payload_constant = (asf->packet_size - MULTI_PAYLOAD_HEADERS);
948 asf->multi_payloads_present = (payload_len < multi_payload_constant);
949
950 asf->packet_size_left = asf->packet_size;
951 if (asf->multi_payloads_present) {
952 frag_len1 = multi_payload_constant - 1;
953 } else {
954 frag_len1 = asf->packet_size - SINGLE_PAYLOAD_HEADERS;
955 }
956 asf->packet_timestamp_start = timestamp;
957 } else {
958 // multi payloads
959 frag_len1 = asf->packet_size_left -
960 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -
961 PACKET_HEADER_MIN_SIZE - 1;
962
963 if (frag_len1 < payload_len &&
964 avst->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
965 flush_packet(s);
966 continue;
967 }
968 if (asf->packet_timestamp_start > INT64_MAX - UINT16_MAX ||
969 timestamp > asf->packet_timestamp_start + UINT16_MAX) {
970 flush_packet(s);
971 continue;
972 }
973 }
974 if (frag_len1 > 0) {
975 if (payload_len > frag_len1)
976 payload_len = frag_len1;
977 else if (payload_len == (frag_len1 - 1))
978 payload_len = frag_len1 - 2; // additional byte need to put padding length
979
980 put_payload_header(s, stream, timestamp + PREROLL_TIME,
981 m_obj_size, m_obj_offset, payload_len, flags);
982 avio_write(&asf->pb, buf, payload_len);
983
984 if (asf->multi_payloads_present)
985 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
986 else
987 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
988 asf->packet_timestamp_end = timestamp;
989
990 asf->packet_nb_payloads++;
991 } else {
992 payload_len = 0;
993 }
994 m_obj_offset += payload_len;
995 buf += payload_len;
996
997 if (!asf->multi_payloads_present)
998 flush_packet(s);
999 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
1000 flush_packet(s);
1001 else if (asf->packet_nb_payloads == ASF_PAYLOADS_PER_PACKET)
1002 flush_packet(s);
1003 }
1004 stream->seq++;
1005 }
1006
update_index(AVFormatContext * s,int start_sec,uint32_t packet_number,uint16_t packet_count,uint64_t packet_offset)1007 static int update_index(AVFormatContext *s, int start_sec,
1008 uint32_t packet_number, uint16_t packet_count,
1009 uint64_t packet_offset)
1010 {
1011 ASFContext *asf = s->priv_data;
1012
1013 if (start_sec > asf->next_start_sec) {
1014 int i;
1015
1016 if (!asf->next_start_sec) {
1017 asf->next_packet_number = packet_number;
1018 asf->next_packet_count = packet_count;
1019 asf->next_packet_offset = packet_offset;
1020 }
1021
1022 if (start_sec > asf->nb_index_memory_alloc) {
1023 int err;
1024 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);
1025 if ((err = av_reallocp_array(&asf->index_ptr,
1026 asf->nb_index_memory_alloc,
1027 sizeof(*asf->index_ptr))) < 0) {
1028 asf->nb_index_memory_alloc = 0;
1029 return err;
1030 }
1031 }
1032 for (i = asf->next_start_sec; i < start_sec; i++) {
1033 asf->index_ptr[i].packet_number = asf->next_packet_number;
1034 asf->index_ptr[i].packet_count = asf->next_packet_count;
1035 asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000);
1036 asf->index_ptr[i].offset = asf->next_packet_offset;
1037
1038 }
1039 }
1040 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);
1041 asf->next_packet_number = packet_number;
1042 asf->next_packet_count = packet_count;
1043 asf->next_packet_offset = packet_offset;
1044 asf->next_start_sec = start_sec;
1045
1046 return 0;
1047 }
1048
asf_write_packet(AVFormatContext * s,AVPacket * pkt)1049 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
1050 {
1051 ASFContext *asf = s->priv_data;
1052 AVIOContext *pb = s->pb;
1053 ASFStream *stream;
1054 AVCodecParameters *par;
1055 uint32_t packet_number;
1056 int64_t pts;
1057 int start_sec;
1058 int flags = pkt->flags;
1059 int ret;
1060 uint64_t offset = avio_tell(pb);
1061
1062 par = s->streams[pkt->stream_index]->codecpar;
1063 stream = &asf->streams[pkt->stream_index];
1064
1065 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
1066 flags &= ~AV_PKT_FLAG_KEY;
1067
1068 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
1069 av_assert0(pts != AV_NOPTS_VALUE);
1070 if ( pts < - PREROLL_TIME
1071 || pts > (INT_MAX-3)/10000LL * ASF_INDEXED_INTERVAL - PREROLL_TIME) {
1072 av_log(s, AV_LOG_ERROR, "input pts %"PRId64" is invalid\n", pts);
1073 return AVERROR(EINVAL);
1074 }
1075 pts *= 10000;
1076 asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);
1077
1078 packet_number = asf->nb_packets;
1079 put_frame(s, stream, s->streams[pkt->stream_index],
1080 pkt->dts, pkt->data, pkt->size, flags);
1081
1082 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)
1083 / ASF_INDEXED_INTERVAL);
1084
1085 /* check index */
1086 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
1087 uint16_t packet_count = asf->nb_packets - packet_number;
1088 ret = update_index(s, start_sec, packet_number, packet_count, offset);
1089 if (ret < 0)
1090 return ret;
1091 }
1092 asf->end_sec = start_sec;
1093
1094 return 0;
1095 }
1096
asf_write_index(AVFormatContext * s,const ASFIndex * index,uint16_t max,uint32_t count)1097 static int asf_write_index(AVFormatContext *s, const ASFIndex *index,
1098 uint16_t max, uint32_t count)
1099 {
1100 AVIOContext *pb = s->pb;
1101 int i;
1102
1103 ff_put_guid(pb, &ff_asf_simple_index_header);
1104 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
1105 ff_put_guid(pb, &ff_asf_my_guid);
1106 avio_wl64(pb, ASF_INDEXED_INTERVAL);
1107 avio_wl32(pb, max);
1108 avio_wl32(pb, count);
1109 for (i = 0; i < count; i++) {
1110 avio_wl32(pb, index[i].packet_number);
1111 avio_wl16(pb, index[i].packet_count);
1112 }
1113
1114 return 0;
1115 }
1116
asf_write_trailer(AVFormatContext * s)1117 static int asf_write_trailer(AVFormatContext *s)
1118 {
1119 ASFContext *asf = s->priv_data;
1120 int64_t file_size, data_size;
1121 int ret;
1122
1123 /* flush the current packet */
1124 if (asf->pb.buf_ptr > asf->pb.buffer)
1125 flush_packet(s);
1126
1127 /* write index */
1128 data_size = avio_tell(s->pb);
1129 if (!asf->is_streamed && asf->next_start_sec) {
1130 if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0)
1131 return ret;
1132 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);
1133 }
1134
1135 if (asf->is_streamed || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1136 put_chunk(s, 0x4524, 0, 0); /* end of stream */
1137 } else {
1138 /* rewrite an updated header */
1139 file_size = avio_tell(s->pb);
1140 avio_seek(s->pb, 0, SEEK_SET);
1141 asf_write_header1(s, file_size, data_size - asf->data_offset);
1142 }
1143
1144 av_freep(&asf->index_ptr);
1145 return 0;
1146 }
1147
1148 static const AVOption asf_options[] = {
1149 { "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 },
1150 { NULL },
1151 };
1152
1153 #if CONFIG_ASF_MUXER
1154 static const AVClass asf_muxer_class = {
1155 .class_name = "ASF muxer",
1156 .item_name = av_default_item_name,
1157 .option = asf_options,
1158 .version = LIBAVUTIL_VERSION_INT,
1159 };
1160
1161 AVOutputFormat ff_asf_muxer = {
1162 .name = "asf",
1163 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1164 .mime_type = "video/x-ms-asf",
1165 .extensions = "asf,wmv,wma",
1166 .priv_data_size = sizeof(ASFContext),
1167 .audio_codec = AV_CODEC_ID_WMAV2,
1168 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1169 .write_header = asf_write_header,
1170 .write_packet = asf_write_packet,
1171 .write_trailer = asf_write_trailer,
1172 .flags = AVFMT_GLOBALHEADER,
1173 .codec_tag = (const AVCodecTag * const []) {
1174 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1175 },
1176 .priv_class = &asf_muxer_class,
1177 };
1178 #endif /* CONFIG_ASF_MUXER */
1179
1180 #if CONFIG_ASF_STREAM_MUXER
1181 static const AVClass asf_stream_muxer_class = {
1182 .class_name = "ASF stream muxer",
1183 .item_name = av_default_item_name,
1184 .option = asf_options,
1185 .version = LIBAVUTIL_VERSION_INT,
1186 };
1187
1188 AVOutputFormat ff_asf_stream_muxer = {
1189 .name = "asf_stream",
1190 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1191 .mime_type = "video/x-ms-asf",
1192 .extensions = "asf,wmv,wma",
1193 .priv_data_size = sizeof(ASFContext),
1194 .audio_codec = AV_CODEC_ID_WMAV2,
1195 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1196 .write_header = asf_write_stream_header,
1197 .write_packet = asf_write_packet,
1198 .write_trailer = asf_write_trailer,
1199 .flags = AVFMT_GLOBALHEADER,
1200 .codec_tag = (const AVCodecTag * const []) {
1201 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1202 },
1203 .priv_class = &asf_stream_muxer_class,
1204 };
1205 #endif /* CONFIG_ASF_STREAM_MUXER */
1206