All non zero returns of rm_assemble_video_frame() are errors, check things
[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 uint8_t *videobuf; ///< place to store merged video frame
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 uint8_t *audiobuf; ///< place to store reordered audio data
35 int64_t audiotimestamp; ///< Audio packet timestamp
36 int sub_packet_cnt; // Subpacket counter, used while reading
37 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
38 int audio_framesize; /// Audio frame size from container
39 int sub_packet_lengths[16]; /// Length of each subpacket
40 };
41
42 typedef struct {
43 int nb_packets;
44 int old_format;
45 int current_stream;
46 int remaining_len;
47 int audio_stream_num; ///< Stream number for audio packets
48 int audio_pkt_cnt; ///< Output packet counter
49 } RMDemuxContext;
50
51 static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
52 {
53 int i;
54 char *q, r;
55
56 q = buf;
57 for(i=0;i<len;i++) {
58 r = get_byte(pb);
59 if (i < buf_size - 1)
60 *q++ = r;
61 }
62 if (buf_size > 0) *q = '\0';
63 }
64
65 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
66 {
67 get_strl(pb, buf, buf_size, get_be16(pb));
68 }
69
70 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
71 {
72 get_strl(pb, buf, buf_size, get_byte(pb));
73 }
74
75 RMStream *ff_rm_alloc_rmstream (void)
76 {
77 RMStream *rms = av_mallocz(sizeof(RMStream));
78 rms->curpic_num = -1;
79 return rms;
80 }
81
82 void ff_rm_free_rmstream (RMStream *rms)
83 {
84 av_freep(&rms->videobuf);
85 av_freep(&rms->audiobuf);
86 }
87
88 static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
89 AVStream *st, RMStream *ast, int read_all)
90 {
91 char buf[256];
92 uint32_t version;
93
94 /* ra type header */
95 version = get_be32(pb); /* version */
96 if (((version >> 16) & 0xff) == 3) {
97 int64_t startpos = url_ftell(pb);
98 url_fskip(pb, 14);
99 get_str8(pb, s->title, sizeof(s->title));
100 get_str8(pb, s->author, sizeof(s->author));
101 get_str8(pb, s->copyright, sizeof(s->copyright));
102 get_str8(pb, s->comment, sizeof(s->comment));
103 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
104 // fourcc (should always be "lpcJ")
105 get_byte(pb);
106 get_str8(pb, buf, sizeof(buf));
107 }
108 // Skip extra header crap (this should never happen)
109 if ((startpos + (version & 0xffff)) > url_ftell(pb))
110 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
111 st->codec->sample_rate = 8000;
112 st->codec->channels = 1;
113 st->codec->codec_type = CODEC_TYPE_AUDIO;
114 st->codec->codec_id = CODEC_ID_RA_144;
115 } else {
116 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
117 /* old version (4) */
118 get_be32(pb); /* .ra4 */
119 get_be32(pb); /* data size */
120 get_be16(pb); /* version2 */
121 get_be32(pb); /* header size */
122 flavor= get_be16(pb); /* add codec info / flavor */
123 ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
124 get_be32(pb); /* ??? */
125 get_be32(pb); /* ??? */
126 get_be32(pb); /* ??? */
127 ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
128 st->codec->block_align= get_be16(pb); /* frame size */
129 ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
130 get_be16(pb); /* ??? */
131 if (((version >> 16) & 0xff) == 5) {
132 get_be16(pb); get_be16(pb); get_be16(pb);
133 }
134 st->codec->sample_rate = get_be16(pb);
135 get_be32(pb);
136 st->codec->channels = get_be16(pb);
137 if (((version >> 16) & 0xff) == 5) {
138 get_be32(pb);
139 get_buffer(pb, buf, 4);
140 buf[4] = 0;
141 } else {
142 get_str8(pb, buf, sizeof(buf)); /* desc */
143 get_str8(pb, buf, sizeof(buf)); /* desc */
144 }
145 st->codec->codec_type = CODEC_TYPE_AUDIO;
146 if (!strcmp(buf, "dnet")) {
147 st->codec->codec_id = CODEC_ID_AC3;
148 st->need_parsing = AVSTREAM_PARSE_FULL;
149 } else if (!strcmp(buf, "28_8")) {
150 st->codec->codec_id = CODEC_ID_RA_288;
151 st->codec->extradata_size= 0;
152 ast->audio_framesize = st->codec->block_align;
153 st->codec->block_align = coded_framesize;
154
155 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
156 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
157 return -1;
158 }
159
160 ast->audiobuf = av_malloc(ast->audio_framesize * sub_packet_h);
161 } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
162 int codecdata_length;
163 get_be16(pb); get_byte(pb);
164 if (((version >> 16) & 0xff) == 5)
165 get_byte(pb);
166 codecdata_length = get_be32(pb);
167 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
168 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
169 return -1;
170 }
171
172 if(sub_packet_size <= 0){
173 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
174 return -1;
175 }
176
177 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
178 else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
179 else st->codec->codec_id = CODEC_ID_ATRAC3;
180 st->codec->extradata_size= codecdata_length;
181 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
182 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
183 ast->audio_framesize = st->codec->block_align;
184 st->codec->block_align = ast->sub_packet_size;
185
186 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
187 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
188 return -1;
189 }
190
191 ast->audiobuf = av_malloc(ast->audio_framesize * sub_packet_h);
192 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
193 int codecdata_length;
194 get_be16(pb); get_byte(pb);
195 if (((version >> 16) & 0xff) == 5)
196 get_byte(pb);
197 st->codec->codec_id = CODEC_ID_AAC;
198 codecdata_length = get_be32(pb);
199 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
200 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
201 return -1;
202 }
203 if (codecdata_length >= 1) {
204 st->codec->extradata_size = codecdata_length - 1;
205 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
206 get_byte(pb);
207 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
208 }
209 } else {
210 st->codec->codec_id = CODEC_ID_NONE;
211 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
212 }
213 if (read_all) {
214 get_byte(pb);
215 get_byte(pb);
216 get_byte(pb);
217
218 get_str8(pb, s->title, sizeof(s->title));
219 get_str8(pb, s->author, sizeof(s->author));
220 get_str8(pb, s->copyright, sizeof(s->copyright));
221 get_str8(pb, s->comment, sizeof(s->comment));
222 }
223 }
224 return 0;
225 }
226
227 int
228 ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
229 AVStream *st, RMStream *rst, int codec_data_size)
230 {
231 unsigned int v;
232 int size;
233 int64_t codec_pos;
234
235 av_set_pts_info(st, 64, 1, 1000);
236 codec_pos = url_ftell(pb);
237 v = get_be32(pb);
238 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
239 /* ra type header */
240 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
241 return -1;
242 } else {
243 int fps, fps2;
244 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
245 fail1:
246 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
247 goto skip;
248 }
249 st->codec->codec_tag = get_le32(pb);
250 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
251 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
252 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
253 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
254 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
255 && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
256 goto fail1;
257 st->codec->width = get_be16(pb);
258 st->codec->height = get_be16(pb);
259 st->codec->time_base.num= 1;
260 fps= get_be16(pb);
261 st->codec->codec_type = CODEC_TYPE_VIDEO;
262 get_be32(pb);
263 fps2= get_be16(pb);
264 get_be16(pb);
265
266 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
267
268 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
269 //check is redundant as get_buffer() will catch this
270 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
271 return -1;
272 }
273 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
274 if (!st->codec->extradata)
275 return AVERROR(ENOMEM);
276 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
277
278 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
279 st->codec->time_base.den = fps * st->codec->time_base.num;
280 switch(((uint8_t*)st->codec->extradata)[4]>>4){
281 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
282 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
283 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
284 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
285 default: goto fail1;
286 }
287 }
288
289 skip:
290 /* skip codec info */
291 size = url_ftell(pb) - codec_pos;
292 url_fskip(pb, codec_data_size - size);
293
294 return 0;
295 }
296
297
298 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
299 {
300 RMDemuxContext *rm = s->priv_data;
301 AVStream *st;
302
303 rm->old_format = 1;
304 st = av_new_stream(s, 0);
305 if (!st)
306 return -1;
307 st->priv_data = ff_rm_alloc_rmstream();
308 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
309 }
310
311 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
312 {
313 RMDemuxContext *rm = s->priv_data;
314 AVStream *st;
315 ByteIOContext *pb = s->pb;
316 unsigned int tag;
317 int tag_size;
318 unsigned int start_time, duration;
319 char buf[128];
320 int flags = 0;
321
322 tag = get_le32(pb);
323 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
324 /* very old .ra format */
325 return rm_read_header_old(s, ap);
326 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
327 return AVERROR(EIO);
328 }
329
330 get_be32(pb); /* header size */
331 get_be16(pb);
332 get_be32(pb);
333 get_be32(pb); /* number of headers */
334
335 for(;;) {
336 if (url_feof(pb))
337 return -1;
338 tag = get_le32(pb);
339 tag_size = get_be32(pb);
340 get_be16(pb);
341 #if 0
342 printf("tag=%c%c%c%c (%08x) size=%d\n",
343 (tag) & 0xff,
344 (tag >> 8) & 0xff,
345 (tag >> 16) & 0xff,
346 (tag >> 24) & 0xff,
347 tag,
348 tag_size);
349 #endif
350 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
351 return -1;
352 switch(tag) {
353 case MKTAG('P', 'R', 'O', 'P'):
354 /* file header */
355 get_be32(pb); /* max bit rate */
356 get_be32(pb); /* avg bit rate */
357 get_be32(pb); /* max packet size */
358 get_be32(pb); /* avg packet size */
359 get_be32(pb); /* nb packets */
360 get_be32(pb); /* duration */
361 get_be32(pb); /* preroll */
362 get_be32(pb); /* index offset */
363 get_be32(pb); /* data offset */
364 get_be16(pb); /* nb streams */
365 flags = get_be16(pb); /* flags */
366 break;
367 case MKTAG('C', 'O', 'N', 'T'):
368 get_str16(pb, s->title, sizeof(s->title));
369 get_str16(pb, s->author, sizeof(s->author));
370 get_str16(pb, s->copyright, sizeof(s->copyright));
371 get_str16(pb, s->comment, sizeof(s->comment));
372 break;
373 case MKTAG('M', 'D', 'P', 'R'):
374 st = av_new_stream(s, 0);
375 if (!st)
376 return AVERROR(ENOMEM);
377 st->id = get_be16(pb);
378 get_be32(pb); /* max bit rate */
379 st->codec->bit_rate = get_be32(pb); /* bit rate */
380 get_be32(pb); /* max packet size */
381 get_be32(pb); /* avg packet size */
382 start_time = get_be32(pb); /* start time */
383 get_be32(pb); /* preroll */
384 duration = get_be32(pb); /* duration */
385 st->start_time = start_time;
386 st->duration = duration;
387 get_str8(pb, buf, sizeof(buf)); /* desc */
388 get_str8(pb, buf, sizeof(buf)); /* mimetype */
389 st->codec->codec_type = CODEC_TYPE_DATA;
390 st->priv_data = ff_rm_alloc_rmstream();
391 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
392 get_be32(pb)) < 0)
393 return -1;
394 break;
395 case MKTAG('D', 'A', 'T', 'A'):
396 goto header_end;
397 default:
398 /* unknown tag: skip it */
399 url_fskip(pb, tag_size - 10);
400 break;
401 }
402 }
403 header_end:
404 rm->nb_packets = get_be32(pb); /* number of packets */
405 if (!rm->nb_packets && (flags & 4))
406 rm->nb_packets = 3600 * 25;
407 get_be32(pb); /* next data header */
408 return 0;
409 }
410
411 static int get_num(ByteIOContext *pb, int *len)
412 {
413 int n, n1;
414
415 n = get_be16(pb);
416 (*len)-=2;
417 n &= 0x7FFF;
418 if (n >= 0x4000) {
419 return n - 0x4000;
420 } else {
421 n1 = get_be16(pb);
422 (*len)-=2;
423 return (n << 16) | n1;
424 }
425 }
426
427 /* multiple of 20 bytes for ra144 (ugly) */
428 #define RAW_PACKET_SIZE 1000
429
430 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
431 RMDemuxContext *rm = s->priv_data;
432 ByteIOContext *pb = s->pb;
433 int len, num, res, i;
434 AVStream *st;
435 uint32_t state=0xFFFFFFFF;
436
437 while(!url_feof(pb)){
438 *pos= url_ftell(pb) - 3;
439 if(rm->remaining_len > 0){
440 num= rm->current_stream;
441 len= rm->remaining_len;
442 *timestamp = AV_NOPTS_VALUE;
443 *flags= 0;
444 }else{
445 state= (state<<8) + get_byte(pb);
446
447 if(state == MKBETAG('I', 'N', 'D', 'X')){
448 len = get_be16(pb) - 6;
449 if(len<0)
450 continue;
451 goto skip;
452 }
453
454 if(state > (unsigned)0xFFFF || state < 12)
455 continue;
456 len=state;
457 state= 0xFFFFFFFF;
458
459 num = get_be16(pb);
460 *timestamp = get_be32(pb);
461 res= get_byte(pb); /* reserved */
462 *flags = get_byte(pb); /* flags */
463
464
465 len -= 12;
466 }
467 for(i=0;i<s->nb_streams;i++) {
468 st = s->streams[i];
469 if (num == st->id)
470 break;
471 }
472 if (i == s->nb_streams) {
473 skip:
474 /* skip packet if unknown number */
475 url_fskip(pb, len);
476 rm->remaining_len -= len;
477 continue;
478 }
479 *stream_index= i;
480
481 return len;
482 }
483 return -1;
484 }
485
486 static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
487 RMDemuxContext *rm, RMStream *vst,
488 AVPacket *pkt, int len)
489 {
490 int hdr, seq, pic_num, len2, pos;
491 int type;
492
493 hdr = get_byte(pb); len--;
494 type = hdr >> 6;
495 switch(type){
496 case 0: // slice
497 case 2: // last slice
498 seq = get_byte(pb); len--;
499 len2 = get_num(pb, &len);
500 pos = get_num(pb, &len);
501 pic_num = get_byte(pb); len--;
502 rm->remaining_len = len;
503 break;
504 case 1: //whole frame
505 seq = get_byte(pb); len--;
506 if(av_new_packet(pkt, len + 9) < 0)
507 return AVERROR(EIO);
508 pkt->data[0] = 0;
509 AV_WL32(pkt->data + 1, 1);
510 AV_WL32(pkt->data + 5, 0);
511 get_buffer(pb, pkt->data + 9, len);
512 rm->remaining_len = 0;
513 return 0;
514 case 3: //frame as a part of packet
515 len2 = get_num(pb, &len);
516 pos = get_num(pb, &len);
517 pic_num = get_byte(pb); len--;
518 rm->remaining_len = len - len2;
519 if(av_new_packet(pkt, len2 + 9) < 0)
520 return AVERROR(EIO);
521 pkt->data[0] = 0;
522 AV_WL32(pkt->data + 1, 1);
523 AV_WL32(pkt->data + 5, 0);
524 get_buffer(pb, pkt->data + 9, len2);
525 return 0;
526 }
527 //now we have to deal with single slice
528
529 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
530 vst->slices = ((hdr & 0x3F) << 1) + 1;
531 vst->videobufsize = len2 + 8*vst->slices + 1;
532 av_free(vst->videobuf);
533 if(!(vst->videobuf = av_malloc(vst->videobufsize)))
534 return AVERROR(ENOMEM);
535 vst->videobufpos = 8*vst->slices + 1;
536 vst->cur_slice = 0;
537 vst->curpic_num = pic_num;
538 vst->pktpos = url_ftell(pb);
539 }
540 if(type == 2)
541 len = FFMIN(len, pos);
542
543 if(++vst->cur_slice > vst->slices)
544 return 1;
545 AV_WL32(vst->videobuf - 7 + 8*vst->cur_slice, 1);
546 AV_WL32(vst->videobuf - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
547 if(vst->videobufpos + len > vst->videobufsize)
548 return 1;
549 if (get_buffer(pb, vst->videobuf + vst->videobufpos, len) != len)
550 return AVERROR(EIO);
551 vst->videobufpos += len;
552 rm->remaining_len-= len;
553
554 if(type == 2 || (vst->videobufpos) == vst->videobufsize){
555 vst->videobuf[0] = vst->cur_slice-1;
556 if(av_new_packet(pkt, vst->videobufpos - 8*(vst->slices - vst->cur_slice)) < 0)
557 return AVERROR(ENOMEM);
558 memcpy(pkt->data, vst->videobuf, 1 + 8*vst->cur_slice);
559 memcpy(pkt->data + 1 + 8*vst->cur_slice, vst->videobuf + 1 + 8*vst->slices,
560 vst->videobufpos - 1 - 8*vst->slices);
561 pkt->pts = AV_NOPTS_VALUE;
562 pkt->pos = vst->pktpos;
563 return 0;
564 }
565
566 return 1;
567 }
568
569 static inline void
570 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
571 {
572 uint8_t *ptr;
573 int j;
574
575 if (st->codec->codec_id == CODEC_ID_AC3) {
576 ptr = pkt->data;
577 for (j=0;j<pkt->size;j+=2) {
578 FFSWAP(int, ptr[0], ptr[1]);
579 ptr += 2;
580 }
581 }
582 }
583
584 int
585 ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
586 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
587 int *seq, int *flags, int64_t *timestamp)
588 {
589 RMDemuxContext *rm = s->priv_data;
590
591 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
592 rm->current_stream= st->id;
593 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))
594 return -1; //got partial frame
595 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
596 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
597 (st->codec->codec_id == CODEC_ID_COOK) ||
598 (st->codec->codec_id == CODEC_ID_ATRAC3) ||
599 (st->codec->codec_id == CODEC_ID_SIPR)) {
600 int x;
601 int sps = ast->sub_packet_size;
602 int cfs = ast->coded_framesize;
603 int h = ast->sub_packet_h;
604 int y = ast->sub_packet_cnt;
605 int w = ast->audio_framesize;
606
607 if (*flags & 2)
608 y = ast->sub_packet_cnt = 0;
609 if (!y)
610 ast->audiotimestamp = *timestamp;
611
612 switch(st->codec->codec_id) {
613 case CODEC_ID_RA_288:
614 for (x = 0; x < h/2; x++)
615 get_buffer(pb, ast->audiobuf+x*2*w+y*cfs, cfs);
616 break;
617 case CODEC_ID_ATRAC3:
618 case CODEC_ID_COOK:
619 for (x = 0; x < w/sps; x++)
620 get_buffer(pb, ast->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
621 break;
622 }
623
624 if (++(ast->sub_packet_cnt) < h)
625 return -1;
626 else {
627 ast->sub_packet_cnt = 0;
628 rm->audio_stream_num = st->index;
629 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
630 // Release first audio packet
631 av_new_packet(pkt, st->codec->block_align);
632 memcpy(pkt->data, ast->audiobuf, st->codec->block_align);
633 *timestamp = ast->audiotimestamp;
634 *flags = 2; // Mark first packet as keyframe
635 }
636 } else if (st->codec->codec_id == CODEC_ID_AAC) {
637 int x;
638 rm->audio_stream_num = st->index;
639 ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
640 if (ast->sub_packet_cnt) {
641 for (x = 0; x < ast->sub_packet_cnt; x++)
642 ast->sub_packet_lengths[x] = get_be16(pb);
643 // Release first audio packet
644 rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
645 av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
646 *flags = 2; // Mark first packet as keyframe
647 }
648 } else {
649 av_get_packet(pb, pkt, len);
650 rm_ac3_swap_bytes(st, pkt);
651 }
652 } else
653 av_get_packet(pb, pkt, len);
654
655 if( (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
656 || st->discard >= AVDISCARD_ALL){
657 av_free_packet(pkt);
658 return -1;
659 }
660
661 pkt->stream_index = st->index;
662
663 #if 0
664 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
665 if(st->codec->codec_id == CODEC_ID_RV20){
666 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
667 av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
668
669 seq |= (*timestamp&~0x3FFF);
670 if(seq - *timestamp > 0x2000) seq -= 0x4000;
671 if(seq - *timestamp < -0x2000) seq += 0x4000;
672 }
673 }
674 #endif
675
676 pkt->pts= *timestamp;
677 if (*flags & 2)
678 pkt->flags |= PKT_FLAG_KEY;
679
680 return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
681 }
682
683 int
684 ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
685 AVStream *st, RMStream *ast, AVPacket *pkt)
686 {
687 RMDemuxContext *rm = s->priv_data;
688
689 assert (rm->audio_pkt_cnt > 0);
690
691 if (st->codec->codec_id == CODEC_ID_AAC)
692 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
693 else {
694 av_new_packet(pkt, st->codec->block_align);
695 memcpy(pkt->data, ast->audiobuf + st->codec->block_align *
696 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
697 st->codec->block_align);
698 }
699 rm->audio_pkt_cnt--;
700 pkt->flags = 0;
701 pkt->stream_index = st->index;
702
703 return rm->audio_pkt_cnt;
704 }
705
706 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
707 {
708 RMDemuxContext *rm = s->priv_data;
709 ByteIOContext *pb = s->pb;
710 AVStream *st;
711 int i, len;
712 int64_t timestamp, pos;
713 int flags;
714
715 if (rm->audio_pkt_cnt) {
716 // If there are queued audio packet return them first
717 st = s->streams[rm->audio_stream_num];
718 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
719 } else if (rm->old_format) {
720 RMStream *ast;
721
722 st = s->streams[0];
723 ast = st->priv_data;
724 if (st->codec->codec_id == CODEC_ID_RA_288) {
725 int x, y;
726
727 for (y = 0; y < ast->sub_packet_h; y++)
728 for (x = 0; x < ast->sub_packet_h/2; x++)
729 if (get_buffer(pb, ast->audiobuf+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
730 return AVERROR(EIO);
731 rm->audio_stream_num = 0;
732 rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
733 // Release first audio packet
734 av_new_packet(pkt, st->codec->block_align);
735 memcpy(pkt->data, ast->audiobuf, st->codec->block_align);
736 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
737 pkt->stream_index = 0;
738 } else {
739 /* just read raw bytes */
740 len = RAW_PACKET_SIZE;
741 len= av_get_packet(pb, pkt, len);
742 pkt->stream_index = 0;
743 if (len <= 0) {
744 return AVERROR(EIO);
745 }
746 pkt->size = len;
747 }
748 rm_ac3_swap_bytes(st, pkt);
749 } else {
750 int seq=1;
751 resync:
752 len=sync(s, &timestamp, &flags, &i, &pos);
753 if(len<0)
754 return AVERROR(EIO);
755 st = s->streams[i];
756
757 if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
758 &seq, &flags, &timestamp) < 0)
759 goto resync;
760
761 if((flags&2) && (seq&0x7F) == 1)
762 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
763 }
764
765 return 0;
766 }
767
768 static int rm_read_close(AVFormatContext *s)
769 {
770 int i;
771
772 for (i=0;i<s->nb_streams;i++)
773 ff_rm_free_rmstream(s->streams[i]->priv_data);
774
775 return 0;
776 }
777
778 static int rm_probe(AVProbeData *p)
779 {
780 /* check file header */
781 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
782 p->buf[2] == 'M' && p->buf[3] == 'F' &&
783 p->buf[4] == 0 && p->buf[5] == 0) ||
784 (p->buf[0] == '.' && p->buf[1] == 'r' &&
785 p->buf[2] == 'a' && p->buf[3] == 0xfd))
786 return AVPROBE_SCORE_MAX;
787 else
788 return 0;
789 }
790
791 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
792 int64_t *ppos, int64_t pos_limit)
793 {
794 RMDemuxContext *rm = s->priv_data;
795 int64_t pos, dts;
796 int stream_index2, flags, len, h;
797
798 pos = *ppos;
799
800 if(rm->old_format)
801 return AV_NOPTS_VALUE;
802
803 url_fseek(s->pb, pos, SEEK_SET);
804 rm->remaining_len=0;
805 for(;;){
806 int seq=1;
807 AVStream *st;
808
809 len=sync(s, &dts, &flags, &stream_index2, &pos);
810 if(len<0)
811 return AV_NOPTS_VALUE;
812
813 st = s->streams[stream_index2];
814 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
815 h= get_byte(s->pb); len--;
816 if(!(h & 0x40)){
817 seq = get_byte(s->pb); len--;
818 }
819 }
820
821 if((flags&2) && (seq&0x7F) == 1){
822 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
823 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
824 if(stream_index2 == stream_index)
825 break;
826 }
827
828 url_fskip(s->pb, len);
829 }
830 *ppos = pos;
831 return dts;
832 }
833
834 AVInputFormat rm_demuxer = {
835 "rm",
836 NULL_IF_CONFIG_SMALL("RM format"),
837 sizeof(RMDemuxContext),
838 rm_probe,
839 rm_read_header,
840 rm_read_packet,
841 rm_read_close,
842 NULL,
843 rm_read_dts,
844 };
845
846 AVInputFormat rdt_demuxer = {
847 "rdt",
848 NULL_IF_CONFIG_SMALL("RDT demuxer"),
849 sizeof(RMDemuxContext),
850 NULL, NULL, NULL, rm_read_close, NULL, NULL
851 };