use PRIxN, %zd, %td formats where needed
[libav.git] / libavformat / asf.c
1 /*
2 * ASF compatible decoder.
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 #include "avformat.h"
20 #include "avi.h"
21 #include "mpegaudio.h"
22 #include "asf.h"
23
24 #undef NDEBUG
25 #include <assert.h>
26
27 #define FRAME_HEADER_SIZE 17
28 // Fix Me! FRAME_HEADER_SIZE may be different.
29
30 static const GUID index_guid = {
31 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
32 };
33
34 /**********************************/
35 /* decoding */
36
37 //#define DEBUG
38
39 #ifdef DEBUG
40 #define PRINT_IF_GUID(g,cmp) \
41 if (!memcmp(g, &cmp, sizeof(GUID))) \
42 printf("(GUID: %s) ", #cmp)
43
44 static void print_guid(const GUID *g)
45 {
46 int i;
47 PRINT_IF_GUID(g, asf_header);
48 else PRINT_IF_GUID(g, file_header);
49 else PRINT_IF_GUID(g, stream_header);
50 else PRINT_IF_GUID(g, audio_stream);
51 else PRINT_IF_GUID(g, audio_conceal_none);
52 else PRINT_IF_GUID(g, video_stream);
53 else PRINT_IF_GUID(g, video_conceal_none);
54 else PRINT_IF_GUID(g, command_stream);
55 else PRINT_IF_GUID(g, comment_header);
56 else PRINT_IF_GUID(g, codec_comment_header);
57 else PRINT_IF_GUID(g, codec_comment1_header);
58 else PRINT_IF_GUID(g, data_header);
59 else PRINT_IF_GUID(g, index_guid);
60 else PRINT_IF_GUID(g, head1_guid);
61 else PRINT_IF_GUID(g, head2_guid);
62 else PRINT_IF_GUID(g, my_guid);
63 else
64 printf("(GUID: unknown) ");
65 printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
66 for(i=0;i<8;i++)
67 printf(" 0x%02x,", g->v4[i]);
68 printf("}\n");
69 }
70 #undef PRINT_IF_GUID(g,cmp)
71 #endif
72
73 static void get_guid(ByteIOContext *s, GUID *g)
74 {
75 int i;
76
77 g->v1 = get_le32(s);
78 g->v2 = get_le16(s);
79 g->v3 = get_le16(s);
80 for(i=0;i<8;i++)
81 g->v4[i] = get_byte(s);
82 }
83
84 #if 0
85 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
86 {
87 int len, c;
88 char *q;
89
90 len = get_le16(pb);
91 q = buf;
92 while (len > 0) {
93 c = get_le16(pb);
94 if ((q - buf) < buf_size - 1)
95 *q++ = c;
96 len--;
97 }
98 *q = '\0';
99 }
100 #endif
101
102 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
103 {
104 int c;
105 char *q;
106
107 q = buf;
108 while (len > 0) {
109 c = get_le16(pb);
110 if ((q - buf) < buf_size - 1)
111 *q++ = c;
112 len-=2;
113 }
114 *q = '\0';
115 }
116
117 static int asf_probe(AVProbeData *pd)
118 {
119 GUID g;
120 const unsigned char *p;
121 int i;
122
123 /* check file header */
124 if (pd->buf_size <= 32)
125 return 0;
126 p = pd->buf;
127 g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
128 p += 4;
129 g.v2 = p[0] | (p[1] << 8);
130 p += 2;
131 g.v3 = p[0] | (p[1] << 8);
132 p += 2;
133 for(i=0;i<8;i++)
134 g.v4[i] = *p++;
135
136 if (!memcmp(&g, &asf_header, sizeof(GUID)))
137 return AVPROBE_SCORE_MAX;
138 else
139 return 0;
140 }
141
142 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
143 {
144 ASFContext *asf = s->priv_data;
145 GUID g;
146 ByteIOContext *pb = &s->pb;
147 AVStream *st;
148 ASFStream *asf_st;
149 int size, i;
150 int64_t gsize;
151
152 get_guid(pb, &g);
153 if (memcmp(&g, &asf_header, sizeof(GUID)))
154 goto fail;
155 get_le64(pb);
156 get_le32(pb);
157 get_byte(pb);
158 get_byte(pb);
159 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
160 for(;;) {
161 get_guid(pb, &g);
162 gsize = get_le64(pb);
163 #ifdef DEBUG
164 printf("%08Lx: ", url_ftell(pb) - 24);
165 print_guid(&g);
166 printf(" size=0x%Lx\n", gsize);
167 #endif
168 if (gsize < 24)
169 goto fail;
170 if (!memcmp(&g, &file_header, sizeof(GUID))) {
171 get_guid(pb, &asf->hdr.guid);
172 asf->hdr.file_size = get_le64(pb);
173 asf->hdr.create_time = get_le64(pb);
174 asf->hdr.packets_count = get_le64(pb);
175 asf->hdr.send_time = get_le64(pb);
176 asf->hdr.play_time = get_le64(pb);
177 asf->hdr.preroll = get_le32(pb);
178 asf->hdr.ignore = get_le32(pb);
179 asf->hdr.flags = get_le32(pb);
180 asf->hdr.min_pktsize = get_le32(pb);
181 asf->hdr.max_pktsize = get_le32(pb);
182 asf->hdr.max_bitrate = get_le32(pb);
183 asf->packet_size = asf->hdr.max_pktsize;
184 asf->nb_packets = asf->hdr.packets_count;
185 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
186 int type, total_size, type_specific_size, sizeX;
187 unsigned int tag1;
188 int64_t pos1, pos2;
189
190 pos1 = url_ftell(pb);
191
192 st = av_new_stream(s, 0);
193 if (!st)
194 goto fail;
195 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
196 asf_st = av_mallocz(sizeof(ASFStream));
197 if (!asf_st)
198 goto fail;
199 st->priv_data = asf_st;
200 st->start_time = asf->hdr.preroll;
201 st->duration = asf->hdr.send_time /
202 (10000000 / 1000) - st->start_time;
203 get_guid(pb, &g);
204 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
205 type = CODEC_TYPE_AUDIO;
206 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
207 type = CODEC_TYPE_VIDEO;
208 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
209 type = CODEC_TYPE_UNKNOWN;
210 } else {
211 goto fail;
212 }
213 get_guid(pb, &g);
214 total_size = get_le64(pb);
215 type_specific_size = get_le32(pb);
216 get_le32(pb);
217 st->id = get_le16(pb) & 0x7f; /* stream id */
218 // mapping of asf ID to AV stream ID;
219 asf->asfid2avid[st->id] = s->nb_streams - 1;
220
221 get_le32(pb);
222 st->codec->codec_type = type;
223 if (type == CODEC_TYPE_AUDIO) {
224 get_wav_header(pb, st->codec, type_specific_size);
225 st->need_parsing = 1;
226 /* We have to init the frame size at some point .... */
227 pos2 = url_ftell(pb);
228 if (gsize > (pos2 + 8 - pos1 + 24)) {
229 asf_st->ds_span = get_byte(pb);
230 asf_st->ds_packet_size = get_le16(pb);
231 asf_st->ds_chunk_size = get_le16(pb);
232 asf_st->ds_data_size = get_le16(pb);
233 asf_st->ds_silence_data = get_byte(pb);
234 }
235 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
236 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
237 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
238 if (asf_st->ds_span > 1) {
239 if (!asf_st->ds_chunk_size
240 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
241 asf_st->ds_span = 0; // disable descrambling
242 }
243 switch (st->codec->codec_id) {
244 case CODEC_ID_MP3:
245 st->codec->frame_size = MPA_FRAME_SIZE;
246 break;
247 case CODEC_ID_PCM_S16LE:
248 case CODEC_ID_PCM_S16BE:
249 case CODEC_ID_PCM_U16LE:
250 case CODEC_ID_PCM_U16BE:
251 case CODEC_ID_PCM_S8:
252 case CODEC_ID_PCM_U8:
253 case CODEC_ID_PCM_ALAW:
254 case CODEC_ID_PCM_MULAW:
255 st->codec->frame_size = 1;
256 break;
257 default:
258 /* This is probably wrong, but it prevents a crash later */
259 st->codec->frame_size = 1;
260 break;
261 }
262 } else {
263 get_le32(pb);
264 get_le32(pb);
265 get_byte(pb);
266 size = get_le16(pb); /* size */
267 sizeX= get_le32(pb); /* size */
268 st->codec->width = get_le32(pb);
269 st->codec->height = get_le32(pb);
270 /* not available for asf */
271 get_le16(pb); /* panes */
272 st->codec->bits_per_sample = get_le16(pb); /* depth */
273 tag1 = get_le32(pb);
274 url_fskip(pb, 20);
275 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
276 size= sizeX;
277 if (size > 40) {
278 st->codec->extradata_size = size - 40;
279 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
280 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
281 }
282
283 /* Extract palette from extradata if bpp <= 8 */
284 /* This code assumes that extradata contains only palette */
285 /* This is true for all paletted codecs implemented in ffmpeg */
286 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
287 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
288 #ifdef WORDS_BIGENDIAN
289 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
290 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
291 #else
292 memcpy(st->codec->palctrl->palette, st->codec->extradata,
293 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
294 #endif
295 st->codec->palctrl->palette_changed = 1;
296 }
297
298 st->codec->codec_tag = tag1;
299 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
300 if(tag1 == MKTAG('D', 'V', 'R', ' '))
301 st->need_parsing = 1;
302 }
303 pos2 = url_ftell(pb);
304 url_fskip(pb, gsize - (pos2 - pos1 + 24));
305 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
306 break;
307 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
308 int len1, len2, len3, len4, len5;
309
310 len1 = get_le16(pb);
311 len2 = get_le16(pb);
312 len3 = get_le16(pb);
313 len4 = get_le16(pb);
314 len5 = get_le16(pb);
315 get_str16_nolen(pb, len1, s->title, sizeof(s->title));
316 get_str16_nolen(pb, len2, s->author, sizeof(s->author));
317 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
318 get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
319 url_fskip(pb, len5);
320 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
321 int desc_count, i;
322
323 desc_count = get_le16(pb);
324 for(i=0;i<desc_count;i++)
325 {
326 int name_len,value_type,value_len,value_num = 0;
327 char *name, *value;
328
329 name_len = get_le16(pb);
330 name = (char *)av_mallocz(name_len);
331 get_str16_nolen(pb, name_len, name, name_len);
332 value_type = get_le16(pb);
333 value_len = get_le16(pb);
334 if ((value_type == 0) || (value_type == 1)) // unicode or byte
335 {
336 value = (char *)av_mallocz(value_len);
337 get_str16_nolen(pb, value_len, value, value_len);
338 if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }
339 av_free(value);
340 }
341 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
342 {
343 if (value_type==2) value_num = get_le32(pb);
344 if (value_type==3) value_num = get_le32(pb);
345 if (value_type==4) value_num = get_le64(pb);
346 if (value_type==5) value_num = get_le16(pb);
347 if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
348 if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
349 }
350 av_free(name);
351 }
352 #if 0
353 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
354 int v1, v2;
355 get_guid(pb, &g);
356 v1 = get_le32(pb);
357 v2 = get_le16(pb);
358 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
359 int len, v1, n, num;
360 char str[256], *q;
361 char tag[16];
362
363 get_guid(pb, &g);
364 print_guid(&g);
365
366 n = get_le32(pb);
367 for(i=0;i<n;i++) {
368 num = get_le16(pb); /* stream number */
369 get_str16(pb, str, sizeof(str));
370 get_str16(pb, str, sizeof(str));
371 len = get_le16(pb);
372 q = tag;
373 while (len > 0) {
374 v1 = get_byte(pb);
375 if ((q - tag) < sizeof(tag) - 1)
376 *q++ = v1;
377 len--;
378 }
379 *q = '\0';
380 }
381 #endif
382 } else if (url_feof(pb)) {
383 goto fail;
384 } else {
385 url_fseek(pb, gsize - 24, SEEK_CUR);
386 }
387 }
388 get_guid(pb, &g);
389 get_le64(pb);
390 get_byte(pb);
391 get_byte(pb);
392 if (url_feof(pb))
393 goto fail;
394 asf->data_offset = url_ftell(pb);
395 asf->packet_size_left = 0;
396
397 return 0;
398
399 fail:
400 for(i=0;i<s->nb_streams;i++) {
401 AVStream *st = s->streams[i];
402 if (st) {
403 av_free(st->priv_data);
404 av_free(st->codec->extradata);
405 }
406 av_free(st);
407 }
408 return -1;
409 }
410
411 #define DO_2BITS(bits, var, defval) \
412 switch (bits & 3) \
413 { \
414 case 3: var = get_le32(pb); rsize += 4; break; \
415 case 2: var = get_le16(pb); rsize += 2; break; \
416 case 1: var = get_byte(pb); rsize++; break; \
417 default: var = defval; break; \
418 }
419
420 static int asf_get_packet(AVFormatContext *s)
421 {
422 ASFContext *asf = s->priv_data;
423 ByteIOContext *pb = &s->pb;
424 uint32_t packet_length, padsize;
425 int rsize = 9;
426 int c;
427
428 assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
429
430 c = get_byte(pb);
431 if (c != 0x82) {
432 if (!url_feof(pb))
433 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
434 }
435 if ((c & 0x0f) == 2) { // always true for now
436 if (get_le16(pb) != 0) {
437 if (!url_feof(pb))
438 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
439 return AVERROR_IO;
440 }
441 rsize+=2;
442 /* }else{
443 if (!url_feof(pb))
444 printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
445 return AVERROR_IO;*/
446 }
447
448 asf->packet_flags = get_byte(pb);
449 asf->packet_property = get_byte(pb);
450
451 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
452 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
453 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
454
455 asf->packet_timestamp = get_le32(pb);
456 get_le16(pb); /* duration */
457 // rsize has at least 11 bytes which have to be present
458
459 if (asf->packet_flags & 0x01) {
460 asf->packet_segsizetype = get_byte(pb); rsize++;
461 asf->packet_segments = asf->packet_segsizetype & 0x3f;
462 } else {
463 asf->packet_segments = 1;
464 asf->packet_segsizetype = 0x80;
465 }
466 asf->packet_size_left = packet_length - padsize - rsize;
467 if (packet_length < asf->hdr.min_pktsize)
468 padsize += asf->hdr.min_pktsize - packet_length;
469 asf->packet_padsize = padsize;
470 #ifdef DEBUG
471 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
472 #endif
473 return 0;
474 }
475
476 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
477 {
478 ASFContext *asf = s->priv_data;
479 ASFStream *asf_st = 0;
480 ByteIOContext *pb = &s->pb;
481 //static int pc = 0;
482 for (;;) {
483 int rsize = 0;
484 if (asf->packet_size_left < FRAME_HEADER_SIZE
485 || asf->packet_segments < 1) {
486 //asf->packet_size_left <= asf->packet_padsize) {
487 int ret = asf->packet_size_left + asf->packet_padsize;
488 //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
489 if((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size)
490 ret += asf->packet_size - ((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size);
491 /* fail safe */
492 url_fskip(pb, ret);
493 asf->packet_pos= url_ftell(&s->pb);
494 ret = asf_get_packet(s);
495 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
496 if (ret < 0 || url_feof(pb))
497 return AVERROR_IO;
498 asf->packet_time_start = 0;
499 continue;
500 }
501 if (asf->packet_time_start == 0) {
502 /* read frame header */
503 int num = get_byte(pb);
504 asf->packet_segments--;
505 rsize++;
506 asf->packet_key_frame = (num & 0x80) >> 7;
507 asf->stream_index = asf->asfid2avid[num & 0x7f];
508 // sequence should be ignored!
509 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
510 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
511 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
512 //printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
513 if (asf->packet_replic_size > 1) {
514 assert(asf->packet_replic_size >= 8);
515 // it should be always at least 8 bytes - FIXME validate
516 asf->packet_obj_size = get_le32(pb);
517 asf->packet_frag_timestamp = get_le32(pb); // timestamp
518 if (asf->packet_replic_size > 8)
519 url_fskip(pb, asf->packet_replic_size - 8);
520 rsize += asf->packet_replic_size; // FIXME - check validity
521 } else if (asf->packet_replic_size==1){
522 // multipacket - frag_offset is begining timestamp
523 asf->packet_time_start = asf->packet_frag_offset;
524 asf->packet_frag_offset = 0;
525 asf->packet_frag_timestamp = asf->packet_timestamp;
526
527 asf->packet_time_delta = get_byte(pb);
528 rsize++;
529 }else{
530 assert(asf->packet_replic_size==0);
531 }
532 if (asf->packet_flags & 0x01) {
533 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
534 #undef DO_2BITS
535 //printf("Fragsize %d\n", asf->packet_frag_size);
536 } else {
537 asf->packet_frag_size = asf->packet_size_left - rsize;
538 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
539 }
540 if (asf->packet_replic_size == 1) {
541 asf->packet_multi_size = asf->packet_frag_size;
542 if (asf->packet_multi_size > asf->packet_size_left) {
543 asf->packet_segments = 0;
544 continue;
545 }
546 }
547 asf->packet_size_left -= rsize;
548 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
549
550 if (asf->stream_index < 0
551 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
552 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
553 ) {
554 asf->packet_time_start = 0;
555 /* unhandled packet (should not happen) */
556 url_fskip(pb, asf->packet_frag_size);
557 asf->packet_size_left -= asf->packet_frag_size;
558 if(asf->stream_index < 0)
559 av_log(s, AV_LOG_ERROR, "ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
560 continue;
561 }
562 asf->asf_st = s->streams[asf->stream_index]->priv_data;
563 }
564 asf_st = asf->asf_st;
565
566 if ((asf->packet_frag_offset != asf_st->frag_offset
567 || (asf->packet_frag_offset
568 && asf->packet_seq != asf_st->seq)) // seq should be ignored
569 ) {
570 /* cannot continue current packet: free it */
571 // FIXME better check if packet was already allocated
572 av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
573 asf_st->pkt.size,
574 asf->packet_obj_size,
575 asf->packet_frag_offset, asf_st->frag_offset,
576 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
577 if (asf_st->pkt.size)
578 av_free_packet(&asf_st->pkt);
579 asf_st->frag_offset = 0;
580 if (asf->packet_frag_offset != 0) {
581 url_fskip(pb, asf->packet_frag_size);
582 av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
583 asf->packet_size_left -= asf->packet_frag_size;
584 continue;
585 }
586 }
587 if (asf->packet_replic_size == 1) {
588 // frag_offset is here used as the begining timestamp
589 asf->packet_frag_timestamp = asf->packet_time_start;
590 asf->packet_time_start += asf->packet_time_delta;
591 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
592 asf->packet_size_left--;
593 asf->packet_multi_size--;
594 if (asf->packet_multi_size < asf->packet_obj_size)
595 {
596 asf->packet_time_start = 0;
597 url_fskip(pb, asf->packet_multi_size);
598 asf->packet_size_left -= asf->packet_multi_size;
599 continue;
600 }
601 asf->packet_multi_size -= asf->packet_obj_size;
602 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
603 }
604 if (asf_st->frag_offset == 0) {
605 /* new packet */
606 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
607 asf_st->seq = asf->packet_seq;
608 asf_st->pkt.pts = asf->packet_frag_timestamp;
609 asf_st->pkt.stream_index = asf->stream_index;
610 asf_st->pkt.pos =
611 asf_st->packet_pos= asf->packet_pos;
612 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
613 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
614 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
615 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
616 asf->packet_key_frame = 1;
617 if (asf->packet_key_frame)
618 asf_st->pkt.flags |= PKT_FLAG_KEY;
619 }
620
621 /* read data */
622 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
623 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
624 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
625 asf->packet_size_left -= asf->packet_frag_size;
626 if (asf->packet_size_left < 0)
627 continue;
628 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
629 asf->packet_frag_size);
630 asf_st->frag_offset += asf->packet_frag_size;
631 /* test if whole packet is read */
632 if (asf_st->frag_offset == asf_st->pkt.size) {
633 /* return packet */
634 if (asf_st->ds_span > 1) {
635 /* packet descrambling */
636 char* newdata = av_malloc(asf_st->pkt.size);
637 if (newdata) {
638 int offset = 0;
639 while (offset < asf_st->pkt.size) {
640 int off = offset / asf_st->ds_chunk_size;
641 int row = off / asf_st->ds_span;
642 int col = off % asf_st->ds_span;
643 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
644 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
645 memcpy(newdata + offset,
646 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
647 asf_st->ds_chunk_size);
648 offset += asf_st->ds_chunk_size;
649 }
650 av_free(asf_st->pkt.data);
651 asf_st->pkt.data = newdata;
652 }
653 }
654 asf_st->frag_offset = 0;
655 memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
656 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
657 asf_st->pkt.size = 0;
658 asf_st->pkt.data = 0;
659 break; // packet completed
660 }
661 }
662 return 0;
663 }
664
665 static int asf_read_close(AVFormatContext *s)
666 {
667 int i;
668
669 for(i=0;i<s->nb_streams;i++) {
670 AVStream *st = s->streams[i];
671 av_free(st->priv_data);
672 av_free(st->codec->extradata);
673 av_free(st->codec->palctrl);
674 }
675 return 0;
676 }
677
678 // Added to support seeking after packets have been read
679 // If information is not reset, read_packet fails due to
680 // leftover information from previous reads
681 static void asf_reset_header(AVFormatContext *s)
682 {
683 ASFContext *asf = s->priv_data;
684 ASFStream *asf_st;
685 int i;
686
687 asf->packet_nb_frames = 0;
688 asf->packet_timestamp_start = -1;
689 asf->packet_timestamp_end = -1;
690 asf->packet_size_left = 0;
691 asf->packet_segments = 0;
692 asf->packet_flags = 0;
693 asf->packet_property = 0;
694 asf->packet_timestamp = 0;
695 asf->packet_segsizetype = 0;
696 asf->packet_segments = 0;
697 asf->packet_seq = 0;
698 asf->packet_replic_size = 0;
699 asf->packet_key_frame = 0;
700 asf->packet_padsize = 0;
701 asf->packet_frag_offset = 0;
702 asf->packet_frag_size = 0;
703 asf->packet_frag_timestamp = 0;
704 asf->packet_multi_size = 0;
705 asf->packet_obj_size = 0;
706 asf->packet_time_delta = 0;
707 asf->packet_time_start = 0;
708
709 for(i=0; i<s->nb_streams; i++){
710 asf_st= s->streams[i]->priv_data;
711 av_free_packet(&asf_st->pkt);
712 asf_st->frag_offset=0;
713 asf_st->seq=0;
714 }
715 asf->asf_st= NULL;
716 }
717
718 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
719 {
720 ASFContext *asf = s->priv_data;
721 AVPacket pkt1, *pkt = &pkt1;
722 ASFStream *asf_st;
723 int64_t pts;
724 int64_t pos= *ppos;
725 int i;
726 int64_t start_pos[s->nb_streams];
727
728 for(i=0; i<s->nb_streams; i++){
729 start_pos[i]= pos;
730 }
731
732 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
733 *ppos= pos;
734 url_fseek(&s->pb, pos, SEEK_SET);
735
736 //printf("asf_read_pts\n");
737 asf_reset_header(s);
738 for(;;){
739 if (av_read_frame(s, pkt) < 0){
740 av_log(s, AV_LOG_INFO, "seek failed\n");
741 return AV_NOPTS_VALUE;
742 }
743
744 pts= pkt->pts * 1000 / AV_TIME_BASE;
745
746 av_free_packet(pkt);
747 if(pkt->flags&PKT_FLAG_KEY){
748 i= pkt->stream_index;
749
750 asf_st= s->streams[i]->priv_data;
751
752 assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
753 pos= asf_st->packet_pos;
754
755 av_add_index_entry(s->streams[i], pos, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
756 start_pos[i]= asf_st->packet_pos + 1;
757
758 if(pkt->stream_index == stream_index)
759 break;
760 }
761 }
762
763 *ppos= pos;
764 //printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
765
766 return pts;
767 }
768
769 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
770 {
771 ASFContext *asf = s->priv_data;
772
773 if (asf->packet_size <= 0)
774 return -1;
775
776 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
777 return -1;
778
779 asf_reset_header(s);
780 return 0;
781 }
782
783 static AVInputFormat asf_iformat = {
784 "asf",
785 "asf format",
786 sizeof(ASFContext),
787 asf_probe,
788 asf_read_header,
789 asf_read_packet,
790 asf_read_close,
791 asf_read_seek,
792 asf_read_pts,
793 };
794
795 #ifdef CONFIG_MUXERS
796 extern AVOutputFormat asf_oformat;
797 extern AVOutputFormat asf_stream_oformat;
798 #endif //CONFIG_MUXERS
799
800 int asf_init(void)
801 {
802 av_register_input_format(&asf_iformat);
803 #ifdef CONFIG_MUXERS
804 av_register_output_format(&asf_oformat);
805 av_register_output_format(&asf_stream_oformat);
806 #endif //CONFIG_MUXERS
807 return 0;
808 }