a6b95a1f8872d4704c00e978cdd0a806468cf119
[libav.git] / libavformat / rmdec.c
1 /*
2 * "Real" compatible demuxer.
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "avformat.h"
24 #include "rm.h"
25
26 struct RMStream {
27 AVPacket pkt; ///< place to store merged video frame / reordered audio data
28 int videobufsize; ///< current assembled frame size
29 int videobufpos; ///< position for the next slice in the video buffer
30 int curpic_num; ///< picture number of current frame
31 int cur_slice, slices;
32 int64_t pktpos; ///< first slice position in file
33 /// Audio descrambling matrix parameters
34 int64_t audiotimestamp; ///< Audio packet timestamp
35 int sub_packet_cnt; // Subpacket counter, used while reading
36 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
37 int audio_framesize; /// Audio frame size from container
38 int sub_packet_lengths[16]; /// Length of each subpacket
39 };
40
41 typedef struct {
42 int nb_packets;
43 int old_format;
44 int current_stream;
45 int remaining_len;
46 int audio_stream_num; ///< Stream number for audio packets
47 int audio_pkt_cnt; ///< Output packet counter
48 } RMDemuxContext;
49
50 static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
51 {
52 int i;
53 char *q, r;
54
55 q = buf;
56 for(i=0;i<len;i++) {
57 r = get_byte(pb);
58 if (i < buf_size - 1)
59 *q++ = r;
60 }
61 if (buf_size > 0) *q = '\0';
62 }
63
64 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
65 {
66 get_strl(pb, buf, buf_size, get_be16(pb));
67 }
68
69 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
70 {
71 get_strl(pb, buf, buf_size, get_byte(pb));
72 }
73
74 RMStream *ff_rm_alloc_rmstream (void)
75 {
76 RMStream *rms = av_mallocz(sizeof(RMStream));
77 rms->curpic_num = -1;
78 return rms;
79 }
80
81 void ff_rm_free_rmstream (RMStream *rms)
82 {
83 av_free_packet(&rms->pkt);
84 }
85
86 static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
87 AVStream *st, RMStream *ast, int read_all)
88 {
89 char buf[256];
90 uint32_t version;
91
92 /* ra type header */
93 version = get_be32(pb); /* version */
94 if (((version >> 16) & 0xff) == 3) {
95 int64_t startpos = url_ftell(pb);
96 url_fskip(pb, 14);
97 get_str8(pb, s->title, sizeof(s->title));
98 get_str8(pb, s->author, sizeof(s->author));
99 get_str8(pb, s->copyright, sizeof(s->copyright));
100 get_str8(pb, s->comment, sizeof(s->comment));
101 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
102 // fourcc (should always be "lpcJ")
103 get_byte(pb);
104 get_str8(pb, buf, sizeof(buf));
105 }
106 // Skip extra header crap (this should never happen)
107 if ((startpos + (version & 0xffff)) > url_ftell(pb))
108 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
109 st->codec->sample_rate = 8000;
110 st->codec->channels = 1;
111 st->codec->codec_type = CODEC_TYPE_AUDIO;
112 st->codec->codec_id = CODEC_ID_RA_144;
113 } else {
114 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
115 /* old version (4) */
116 get_be32(pb); /* .ra4 */
117 get_be32(pb); /* data size */
118 get_be16(pb); /* version2 */
119 get_be32(pb); /* header size */
120 flavor= get_be16(pb); /* add codec info / flavor */
121 ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
122 get_be32(pb); /* ??? */
123 get_be32(pb); /* ??? */
124 get_be32(pb); /* ??? */
125 ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
126 st->codec->block_align= get_be16(pb); /* frame size */
127 ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
128 get_be16(pb); /* ??? */
129 if (((version >> 16) & 0xff) == 5) {
130 get_be16(pb); get_be16(pb); get_be16(pb);
131 }
132 st->codec->sample_rate = get_be16(pb);
133 get_be32(pb);
134 st->codec->channels = get_be16(pb);
135 if (((version >> 16) & 0xff) == 5) {
136 get_be32(pb);
137 get_buffer(pb, buf, 4);
138 buf[4] = 0;
139 } else {
140 get_str8(pb, buf, sizeof(buf)); /* desc */
141 get_str8(pb, buf, sizeof(buf)); /* desc */
142 }
143 st->codec->codec_type = CODEC_TYPE_AUDIO;
144 if (!strcmp(buf, "dnet")) {
145 st->codec->codec_id = CODEC_ID_AC3;
146 st->need_parsing = AVSTREAM_PARSE_FULL;
147 } else if (!strcmp(buf, "28_8")) {
148 st->codec->codec_id = CODEC_ID_RA_288;
149 st->codec->extradata_size= 0;
150 ast->audio_framesize = st->codec->block_align;
151 st->codec->block_align = coded_framesize;
152
153 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
154 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
155 return -1;
156 }
157
158 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
159 } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
160 int codecdata_length;
161 get_be16(pb); get_byte(pb);
162 if (((version >> 16) & 0xff) == 5)
163 get_byte(pb);
164 codecdata_length = get_be32(pb);
165 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
166 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
167 return -1;
168 }
169
170 if(sub_packet_size <= 0){
171 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
172 return -1;
173 }
174
175 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
176 else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
177 else st->codec->codec_id = CODEC_ID_ATRAC3;
178 st->codec->extradata_size= codecdata_length;
179 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
180 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
181 ast->audio_framesize = st->codec->block_align;
182 st->codec->block_align = ast->sub_packet_size;
183
184 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
185 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
186 return -1;
187 }
188
189 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
190 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
191 int codecdata_length;
192 get_be16(pb); get_byte(pb);
193 if (((version >> 16) & 0xff) == 5)
194 get_byte(pb);
195 st->codec->codec_id = CODEC_ID_AAC;
196 codecdata_length = get_be32(pb);
197 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
198 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
199 return -1;
200 }
201 if (codecdata_length >= 1) {
202 st->codec->extradata_size = codecdata_length - 1;
203 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
204 get_byte(pb);
205 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
206 }
207 } else {
208 st->codec->codec_id = CODEC_ID_NONE;
209 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
210 }
211 if (read_all) {
212 get_byte(pb);
213 get_byte(pb);
214 get_byte(pb);
215
216 get_str8(pb, s->title, sizeof(s->title));
217 get_str8(pb, s->author, sizeof(s->author));
218 get_str8(pb, s->copyright, sizeof(s->copyright));
219 get_str8(pb, s->comment, sizeof(s->comment));
220 }
221 }
222 return 0;
223 }
224
225 int
226 ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
227 AVStream *st, RMStream *rst, int codec_data_size)
228 {
229 unsigned int v;
230 int size;
231 int64_t codec_pos;
232
233 av_set_pts_info(st, 64, 1, 1000);
234 codec_pos = url_ftell(pb);
235 v = get_be32(pb);
236 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
237 /* ra type header */
238 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
239 return -1;
240 } else {
241 int fps, fps2;
242 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
243 fail1:
244 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
245 goto skip;
246 }
247 st->codec->codec_tag = get_le32(pb);
248 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
249 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
250 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
251 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
252 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
253 && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
254 goto fail1;
255 st->codec->width = get_be16(pb);
256 st->codec->height = get_be16(pb);
257 st->codec->time_base.num= 1;
258 fps= get_be16(pb);
259 st->codec->codec_type = CODEC_TYPE_VIDEO;
260 get_be32(pb);
261 fps2= get_be16(pb);
262 get_be16(pb);
263
264 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
265
266 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
267 //check is redundant as get_buffer() will catch this
268 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
269 return -1;
270 }
271 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
272 if (!st->codec->extradata)
273 return AVERROR(ENOMEM);
274 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
275
276 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
277 st->codec->time_base.den = fps * st->codec->time_base.num;
278 switch(((uint8_t*)st->codec->extradata)[4]>>4){
279 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
280 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
281 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
282 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
283 default: goto fail1;
284 }
285 }
286
287 skip:
288 /* skip codec info */
289 size = url_ftell(pb) - codec_pos;
290 url_fskip(pb, codec_data_size - size);
291
292 return 0;
293 }
294
295
296 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
297 {
298 RMDemuxContext *rm = s->priv_data;
299 AVStream *st;
300
301 rm->old_format = 1;
302 st = av_new_stream(s, 0);
303 if (!st)
304 return -1;
305 st->priv_data = ff_rm_alloc_rmstream();
306 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
307 }
308
309 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
310 {
311 RMDemuxContext *rm = s->priv_data;
312 AVStream *st;
313 ByteIOContext *pb = s->pb;
314 unsigned int tag;
315 int tag_size;
316 unsigned int start_time, duration;
317 char buf[128];
318 int flags = 0;
319
320 tag = get_le32(pb);
321 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
322 /* very old .ra format */
323 return rm_read_header_old(s, ap);
324 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
325 return AVERROR(EIO);
326 }
327
328 get_be32(pb); /* header size */
329 get_be16(pb);
330 get_be32(pb);
331 get_be32(pb); /* number of headers */
332
333 for(;;) {
334 if (url_feof(pb))
335 return -1;
336 tag = get_le32(pb);
337 tag_size = get_be32(pb);
338 get_be16(pb);
339 #if 0
340 printf("tag=%c%c%c%c (%08x) size=%d\n",
341 (tag) & 0xff,
342 (tag >> 8) & 0xff,
343 (tag >> 16) & 0xff,
344 (tag >> 24) & 0xff,
345 tag,
346 tag_size);
347 #endif
348 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
349 return -1;
350 switch(tag) {
351 case MKTAG('P', 'R', 'O', 'P'):
352 /* file header */
353 get_be32(pb); /* max bit rate */
354 get_be32(pb); /* avg bit rate */
355 get_be32(pb); /* max packet size */
356 get_be32(pb); /* avg packet size */
357 get_be32(pb); /* nb packets */
358 get_be32(pb); /* duration */
359 get_be32(pb); /* preroll */
360 get_be32(pb); /* index offset */
361 get_be32(pb); /* data offset */
362 get_be16(pb); /* nb streams */
363 flags = get_be16(pb); /* flags */
364 break;
365 case MKTAG('C', 'O', 'N', 'T'):
366 get_str16(pb, s->title, sizeof(s->title));
367 get_str16(pb, s->author, sizeof(s->author));
368 get_str16(pb, s->copyright, sizeof(s->copyright));
369 get_str16(pb, s->comment, sizeof(s->comment));
370 break;
371 case MKTAG('M', 'D', 'P', 'R'):
372 st = av_new_stream(s, 0);
373 if (!st)
374 return AVERROR(ENOMEM);
375 st->id = get_be16(pb);
376 get_be32(pb); /* max bit rate */
377 st->codec->bit_rate = get_be32(pb); /* bit rate */
378 get_be32(pb); /* max packet size */
379 get_be32(pb); /* avg packet size */
380 start_time = get_be32(pb); /* start time */
381 get_be32(pb); /* preroll */
382 duration = get_be32(pb); /* duration */
383 st->start_time = start_time;
384 st->duration = duration;
385 get_str8(pb, buf, sizeof(buf)); /* desc */
386 get_str8(pb, buf, sizeof(buf)); /* mimetype */
387 st->codec->codec_type = CODEC_TYPE_DATA;
388 st->priv_data = ff_rm_alloc_rmstream();
389 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
390 get_be32(pb)) < 0)
391 return -1;
392 break;
393 case MKTAG('D', 'A', 'T', 'A'):
394 goto header_end;
395 default:
396 /* unknown tag: skip it */
397 url_fskip(pb, tag_size - 10);
398 break;
399 }
400 }
401 header_end:
402 rm->nb_packets = get_be32(pb); /* number of packets */
403 if (!rm->nb_packets && (flags & 4))
404 rm->nb_packets = 3600 * 25;
405 get_be32(pb); /* next data header */
406 return 0;
407 }
408
409 static int get_num(ByteIOContext *pb, int *len)
410 {
411 int n, n1;
412
413 n = get_be16(pb);
414 (*len)-=2;
415 n &= 0x7FFF;
416 if (n >= 0x4000) {
417 return n - 0x4000;
418 } else {
419 n1 = get_be16(pb);
420 (*len)-=2;
421 return (n << 16) | n1;
422 }
423 }
424
425 /* multiple of 20 bytes for ra144 (ugly) */
426 #define RAW_PACKET_SIZE 1000
427
428 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
429 RMDemuxContext *rm = s->priv_data;
430 ByteIOContext *pb = s->pb;
431 int len, num, res, i;
432 AVStream *st;
433 uint32_t state=0xFFFFFFFF;
434
435 while(!url_feof(pb)){
436 *pos= url_ftell(pb) - 3;
437 if(rm->remaining_len > 0){
438 num= rm->current_stream;
439 len= rm->remaining_len;
440 *timestamp = AV_NOPTS_VALUE;
441 *flags= 0;
442 }else{
443 state= (state<<8) + get_byte(pb);
444
445 if(state == MKBETAG('I', 'N', 'D', 'X')){
446 len = get_be16(pb) - 6;
447 if(len<0)
448 continue;
449 goto skip;
450 }
451
452 if(state > (unsigned)0xFFFF || state < 12)
453 continue;
454 len=state;
455 state= 0xFFFFFFFF;
456
457 num = get_be16(pb);
458 *timestamp = get_be32(pb);
459 res= get_byte(pb); /* reserved */
460 *flags = get_byte(pb); /* flags */
461
462
463 len -= 12;
464 }
465 for(i=0;i<s->nb_streams;i++) {
466 st = s->streams[i];
467 if (num == st->id)
468 break;
469 }
470 if (i == s->nb_streams) {
471 skip:
472 /* skip packet if unknown number */
473 url_fskip(pb, len);
474 rm->remaining_len -= len;
475 continue;
476 }
477 *stream_index= i;
478
479 return len;
480 }
481 return -1;
482 }
483
484 static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
485 RMDemuxContext *rm, RMStream *vst,
486 AVPacket *pkt, int len)
487 {
488 int hdr, seq, pic_num, len2, pos;
489 int type;
490
491 hdr = get_byte(pb); len--;
492 type = hdr >> 6;
493
494 if(type != 3){ // not frame as a part of packet
495 seq = get_byte(pb); len--;
496 }
497 if(type != 1){ // not whole frame
498 len2 = get_num(pb, &len);
499 pos = get_num(pb, &len);
500 pic_num = get_byte(pb); len--;
501 }
502 if(len<0)
503 return -1;
504 rm->remaining_len = len;
505 if(type&1){ // frame, not slice
506 if(type == 3) // frame as a part of packet
507 len= len2;
508 if(rm->remaining_len < len)
509 return -1;
510 rm->remaining_len -= len;
511 if(av_new_packet(pkt, len + 9) < 0)
512 return AVERROR(EIO);
513 pkt->data[0] = 0;
514 AV_WL32(pkt->data + 1, 1);
515 AV_WL32(pkt->data + 5, 0);
516 get_buffer(pb, pkt->data + 9, len);
517 return 0;
518 }
519 //now we have to deal with single slice
520
521 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
522 vst->slices = ((hdr & 0x3F) << 1) + 1;
523 vst->videobufsize = len2 + 8*vst->slices + 1;
524 av_free_packet(&vst->pkt); //FIXME this should be output.
525 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
526 return AVERROR(ENOMEM);
527 vst->videobufpos = 8*vst->slices + 1;
528 vst->cur_slice = 0;
529 vst->curpic_num = pic_num;
530 vst->pktpos = url_ftell(pb);
531 }
532 if(type == 2)
533 len = FFMIN(len, pos);
534
535 if(++vst->cur_slice > vst->slices)
536 return 1;
537 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
538 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
539 if(vst->videobufpos + len > vst->videobufsize)
540 return 1;
541 if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len)
542 return AVERROR(EIO);
543 vst->videobufpos += len;
544 rm->remaining_len-= len;
545
546 if(type == 2 || (vst->videobufpos) == vst->videobufsize){
547 vst->pkt.data[0] = vst->cur_slice-1;
548 *pkt= vst->pkt;
549 vst->pkt.data=
550 vst->pkt.size= 0;
551 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
552 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
553 vst->videobufpos - 1 - 8*vst->slices);
554 pkt->size += 8*(vst->cur_slice - vst->slices);
555 pkt->pts = AV_NOPTS_VALUE;
556 pkt->pos = vst->pktpos;
557 return 0;
558 }
559
560 return 1;
561 }
562
563 static inline void
564 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
565 {
566 uint8_t *ptr;
567 int j;
568
569 if (st->codec->codec_id == CODEC_ID_AC3) {
570 ptr = pkt->data;
571 for (j=0;j<pkt->size;j+=2) {
572 FFSWAP(int, ptr[0], ptr[1]);
573 ptr += 2;
574 }
575 }
576 }
577
578 int
579 ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
580 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
581 int *seq, int *flags, int64_t *timestamp)
582 {
583 RMDemuxContext *rm = s->priv_data;
584
585 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
586 rm->current_stream= st->id;
587 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))
588 return -1; //got partial frame
589 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
590 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
591 (st->codec->codec_id == CODEC_ID_COOK) ||
592 (st->codec->codec_id == CODEC_ID_ATRAC3) ||
593 (st->codec->codec_id == CODEC_ID_SIPR)) {
594 int x;
595 int sps = ast->sub_packet_size;
596 int cfs = ast->coded_framesize;
597 int h = ast->sub_packet_h;
598 int y = ast->sub_packet_cnt;
599 int w = ast->audio_framesize;
600
601 if (*flags & 2)
602 y = ast->sub_packet_cnt = 0;
603 if (!y)
604 ast->audiotimestamp = *timestamp;
605
606 switch(st->codec->codec_id) {
607 case CODEC_ID_RA_288:
608 for (x = 0; x < h/2; x++)
609 get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
610 break;
611 case CODEC_ID_ATRAC3:
612 case CODEC_ID_COOK:
613 for (x = 0; x < w/sps; x++)
614 get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
615 break;
616 }
617
618 if (++(ast->sub_packet_cnt) < h)
619 return -1;
620 else {
621 ast->sub_packet_cnt = 0;
622 rm->audio_stream_num = st->index;
623 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
624 // Release first audio packet
625 av_new_packet(pkt, st->codec->block_align);
626 memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
627 *timestamp = ast->audiotimestamp;
628 *flags = 2; // Mark first packet as keyframe
629 }
630 } else if (st->codec->codec_id == CODEC_ID_AAC) {
631 int x;
632 rm->audio_stream_num = st->index;
633 ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
634 if (ast->sub_packet_cnt) {
635 for (x = 0; x < ast->sub_packet_cnt; x++)
636 ast->sub_packet_lengths[x] = get_be16(pb);
637 // Release first audio packet
638 rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
639 av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
640 *flags = 2; // Mark first packet as keyframe
641 }
642 } else {
643 av_get_packet(pb, pkt, len);
644 rm_ac3_swap_bytes(st, pkt);
645 }
646 } else
647 av_get_packet(pb, pkt, len);
648
649 if( (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
650 || st->discard >= AVDISCARD_ALL){
651 av_free_packet(pkt);
652 return -1;
653 }
654
655 pkt->stream_index = st->index;
656
657 #if 0
658 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
659 if(st->codec->codec_id == CODEC_ID_RV20){
660 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
661 av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
662
663 seq |= (*timestamp&~0x3FFF);
664 if(seq - *timestamp > 0x2000) seq -= 0x4000;
665 if(seq - *timestamp < -0x2000) seq += 0x4000;
666 }
667 }
668 #endif
669
670 pkt->pts= *timestamp;
671 if (*flags & 2)
672 pkt->flags |= PKT_FLAG_KEY;
673
674 return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
675 }
676
677 int
678 ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
679 AVStream *st, RMStream *ast, AVPacket *pkt)
680 {
681 RMDemuxContext *rm = s->priv_data;
682
683 assert (rm->audio_pkt_cnt > 0);
684
685 if (st->codec->codec_id == CODEC_ID_AAC)
686 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
687 else {
688 av_new_packet(pkt, st->codec->block_align);
689 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
690 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
691 st->codec->block_align);
692 }
693 rm->audio_pkt_cnt--;
694 pkt->flags = 0;
695 pkt->stream_index = st->index;
696
697 return rm->audio_pkt_cnt;
698 }
699
700 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
701 {
702 RMDemuxContext *rm = s->priv_data;
703 ByteIOContext *pb = s->pb;
704 AVStream *st;
705 int i, len;
706 int64_t timestamp, pos;
707 int flags;
708
709 if (rm->audio_pkt_cnt) {
710 // If there are queued audio packet return them first
711 st = s->streams[rm->audio_stream_num];
712 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
713 } else if (rm->old_format) {
714 RMStream *ast;
715
716 st = s->streams[0];
717 ast = st->priv_data;
718 if (st->codec->codec_id == CODEC_ID_RA_288) {
719 int x, y;
720
721 for (y = 0; y < ast->sub_packet_h; y++)
722 for (x = 0; x < ast->sub_packet_h/2; x++)
723 if (get_buffer(pb, ast->pkt.data+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
724 return AVERROR(EIO);
725 rm->audio_stream_num = 0;
726 rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
727 // Release first audio packet
728 av_new_packet(pkt, st->codec->block_align);
729 memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
730 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
731 pkt->stream_index = 0;
732 } else {
733 /* just read raw bytes */
734 len = RAW_PACKET_SIZE;
735 len= av_get_packet(pb, pkt, len);
736 pkt->stream_index = 0;
737 if (len <= 0) {
738 return AVERROR(EIO);
739 }
740 pkt->size = len;
741 }
742 rm_ac3_swap_bytes(st, pkt);
743 } else {
744 int seq=1;
745 resync:
746 len=sync(s, &timestamp, &flags, &i, &pos);
747 if(len<0)
748 return AVERROR(EIO);
749 st = s->streams[i];
750
751 if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
752 &seq, &flags, &timestamp) < 0)
753 goto resync;
754
755 if((flags&2) && (seq&0x7F) == 1)
756 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
757 }
758
759 return 0;
760 }
761
762 static int rm_read_close(AVFormatContext *s)
763 {
764 int i;
765
766 for (i=0;i<s->nb_streams;i++)
767 ff_rm_free_rmstream(s->streams[i]->priv_data);
768
769 return 0;
770 }
771
772 static int rm_probe(AVProbeData *p)
773 {
774 /* check file header */
775 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
776 p->buf[2] == 'M' && p->buf[3] == 'F' &&
777 p->buf[4] == 0 && p->buf[5] == 0) ||
778 (p->buf[0] == '.' && p->buf[1] == 'r' &&
779 p->buf[2] == 'a' && p->buf[3] == 0xfd))
780 return AVPROBE_SCORE_MAX;
781 else
782 return 0;
783 }
784
785 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
786 int64_t *ppos, int64_t pos_limit)
787 {
788 RMDemuxContext *rm = s->priv_data;
789 int64_t pos, dts;
790 int stream_index2, flags, len, h;
791
792 pos = *ppos;
793
794 if(rm->old_format)
795 return AV_NOPTS_VALUE;
796
797 url_fseek(s->pb, pos, SEEK_SET);
798 rm->remaining_len=0;
799 for(;;){
800 int seq=1;
801 AVStream *st;
802
803 len=sync(s, &dts, &flags, &stream_index2, &pos);
804 if(len<0)
805 return AV_NOPTS_VALUE;
806
807 st = s->streams[stream_index2];
808 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
809 h= get_byte(s->pb); len--;
810 if(!(h & 0x40)){
811 seq = get_byte(s->pb); len--;
812 }
813 }
814
815 if((flags&2) && (seq&0x7F) == 1){
816 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
817 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
818 if(stream_index2 == stream_index)
819 break;
820 }
821
822 url_fskip(s->pb, len);
823 }
824 *ppos = pos;
825 return dts;
826 }
827
828 AVInputFormat rm_demuxer = {
829 "rm",
830 NULL_IF_CONFIG_SMALL("RM format"),
831 sizeof(RMDemuxContext),
832 rm_probe,
833 rm_read_header,
834 rm_read_packet,
835 rm_read_close,
836 NULL,
837 rm_read_dts,
838 };
839
840 AVInputFormat rdt_demuxer = {
841 "rdt",
842 NULL_IF_CONFIG_SMALL("RDT demuxer"),
843 sizeof(RMDemuxContext),
844 NULL, NULL, NULL, rm_read_close, NULL, NULL
845 };