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