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path: root/libavformat/rmdec.c (plain)
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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 <inttypes.h>
23
24#include "libavutil/avassert.h"
25#include "libavutil/avstring.h"
26#include "libavutil/channel_layout.h"
27#include "libavutil/internal.h"
28#include "libavutil/intreadwrite.h"
29#include "libavutil/dict.h"
30#include "avformat.h"
31#include "avio_internal.h"
32#include "internal.h"
33#include "rmsipr.h"
34#include "rm.h"
35
36#define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/ATRAC
37#define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
38#define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
39#define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
40#define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
41#define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
42
43struct RMStream {
44 AVPacket pkt; ///< place to store merged video frame / reordered audio data
45 int videobufsize; ///< current assembled frame size
46 int videobufpos; ///< position for the next slice in the video buffer
47 int curpic_num; ///< picture number of current frame
48 int cur_slice, slices;
49 int64_t pktpos; ///< first slice position in file
50 /// Audio descrambling matrix parameters
51 int64_t audiotimestamp; ///< Audio packet timestamp
52 int sub_packet_cnt; // Subpacket counter, used while reading
53 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
54 int audio_framesize; /// Audio frame size from container
55 int sub_packet_lengths[16]; /// Length of each subpacket
56 int32_t deint_id; ///< deinterleaver used in audio stream
57};
58
59typedef struct RMDemuxContext {
60 int nb_packets;
61 int old_format;
62 int current_stream;
63 int remaining_len;
64 int audio_stream_num; ///< Stream number for audio packets
65 int audio_pkt_cnt; ///< Output packet counter
66 int data_end;
67} RMDemuxContext;
68
69static int rm_read_close(AVFormatContext *s);
70
71static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
72{
73 int i;
74 char *q, r;
75
76 q = buf;
77 for(i=0;i<len;i++) {
78 r = avio_r8(pb);
79 if (i < buf_size - 1)
80 *q++ = r;
81 }
82 if (buf_size > 0) *q = '\0';
83}
84
85static void get_str8(AVIOContext *pb, char *buf, int buf_size)
86{
87 get_strl(pb, buf, buf_size, avio_r8(pb));
88}
89
90static int rm_read_extradata(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, unsigned size)
91{
92 if (size >= 1<<24) {
93 av_log(s, AV_LOG_ERROR, "extradata size %u too large\n", size);
94 return -1;
95 }
96 if (ff_get_extradata(s, par, pb, size) < 0)
97 return AVERROR(ENOMEM);
98 return 0;
99}
100
101static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
102{
103 char buf[1024];
104 int i;
105
106 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
107 int len = wide ? avio_rb16(pb) : avio_r8(pb);
108 get_strl(pb, buf, sizeof(buf), len);
109 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
110 }
111}
112
113RMStream *ff_rm_alloc_rmstream (void)
114{
115 RMStream *rms = av_mallocz(sizeof(RMStream));
116 if (!rms)
117 return NULL;
118 rms->curpic_num = -1;
119 return rms;
120}
121
122void ff_rm_free_rmstream (RMStream *rms)
123{
124 av_packet_unref(&rms->pkt);
125}
126
127static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
128 AVStream *st, RMStream *ast, int read_all)
129{
130 char buf[256];
131 uint32_t version;
132 int ret;
133
134 /* ra type header */
135 version = avio_rb16(pb); /* version */
136 if (version == 3) {
137 unsigned bytes_per_minute;
138 int header_size = avio_rb16(pb);
139 int64_t startpos = avio_tell(pb);
140 avio_skip(pb, 8);
141 bytes_per_minute = avio_rb16(pb);
142 avio_skip(pb, 4);
143 rm_read_metadata(s, pb, 0);
144 if ((startpos + header_size) >= avio_tell(pb) + 2) {
145 // fourcc (should always be "lpcJ")
146 avio_r8(pb);
147 get_str8(pb, buf, sizeof(buf));
148 }
149 // Skip extra header crap (this should never happen)
150 if ((startpos + header_size) > avio_tell(pb))
151 avio_skip(pb, header_size + startpos - avio_tell(pb));
152 if (bytes_per_minute)
153 st->codecpar->bit_rate = 8LL * bytes_per_minute / 60;
154 st->codecpar->sample_rate = 8000;
155 st->codecpar->channels = 1;
156 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
157 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
158 st->codecpar->codec_id = AV_CODEC_ID_RA_144;
159 ast->deint_id = DEINT_ID_INT0;
160 } else {
161 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
162 int codecdata_length;
163 unsigned bytes_per_minute;
164 /* old version (4) */
165 avio_skip(pb, 2); /* unused */
166 avio_rb32(pb); /* .ra4 */
167 avio_rb32(pb); /* data size */
168 avio_rb16(pb); /* version2 */
169 avio_rb32(pb); /* header size */
170 flavor= avio_rb16(pb); /* add codec info / flavor */
171 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
172 avio_rb32(pb); /* ??? */
173 bytes_per_minute = avio_rb32(pb);
174 if (version == 4) {
175 if (bytes_per_minute)
176 st->codecpar->bit_rate = 8LL * bytes_per_minute / 60;
177 }
178 avio_rb32(pb); /* ??? */
179 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
180 st->codecpar->block_align= avio_rb16(pb); /* frame size */
181 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
182 avio_rb16(pb); /* ??? */
183 if (version == 5) {
184 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
185 }
186 st->codecpar->sample_rate = avio_rb16(pb);
187 avio_rb32(pb);
188 st->codecpar->channels = avio_rb16(pb);
189 if (version == 5) {
190 ast->deint_id = avio_rl32(pb);
191 avio_read(pb, buf, 4);
192 buf[4] = 0;
193 } else {
194 AV_WL32(buf, 0);
195 get_str8(pb, buf, sizeof(buf)); /* desc */
196 ast->deint_id = AV_RL32(buf);
197 get_str8(pb, buf, sizeof(buf)); /* desc */
198 }
199 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
200 st->codecpar->codec_tag = AV_RL32(buf);
201 st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
202 st->codecpar->codec_tag);
203
204 switch (st->codecpar->codec_id) {
205 case AV_CODEC_ID_AC3:
206 st->need_parsing = AVSTREAM_PARSE_FULL;
207 break;
208 case AV_CODEC_ID_RA_288:
209 st->codecpar->extradata_size= 0;
210 av_freep(&st->codecpar->extradata);
211 ast->audio_framesize = st->codecpar->block_align;
212 st->codecpar->block_align = coded_framesize;
213 break;
214 case AV_CODEC_ID_COOK:
215 st->need_parsing = AVSTREAM_PARSE_HEADERS;
216 case AV_CODEC_ID_ATRAC3:
217 case AV_CODEC_ID_SIPR:
218 if (read_all) {
219 codecdata_length = 0;
220 } else {
221 avio_rb16(pb); avio_r8(pb);
222 if (version == 5)
223 avio_r8(pb);
224 codecdata_length = avio_rb32(pb);
225 if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
226 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
227 return -1;
228 }
229 }
230
231 ast->audio_framesize = st->codecpar->block_align;
232 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
233 if (flavor > 3) {
234 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
235 flavor);
236 return -1;
237 }
238 st->codecpar->block_align = ff_sipr_subpk_size[flavor];
239 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
240 } else {
241 if(sub_packet_size <= 0){
242 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
243 return -1;
244 }
245 st->codecpar->block_align = ast->sub_packet_size;
246 }
247 if ((ret = rm_read_extradata(s, pb, st->codecpar, codecdata_length)) < 0)
248 return ret;
249
250 break;
251 case AV_CODEC_ID_AAC:
252 avio_rb16(pb); avio_r8(pb);
253 if (version == 5)
254 avio_r8(pb);
255 codecdata_length = avio_rb32(pb);
256 if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
257 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
258 return -1;
259 }
260 if (codecdata_length >= 1) {
261 avio_r8(pb);
262 if ((ret = rm_read_extradata(s, pb, st->codecpar, codecdata_length - 1)) < 0)
263 return ret;
264 }
265 break;
266 }
267 switch (ast->deint_id) {
268 case DEINT_ID_INT4:
269 if (ast->coded_framesize > ast->audio_framesize ||
270 sub_packet_h <= 1 ||
271 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
272 return AVERROR_INVALIDDATA;
273 if (ast->coded_framesize * sub_packet_h != 2*ast->audio_framesize) {
274 avpriv_request_sample(s, "mismatching interleaver parameters");
275 return AVERROR_INVALIDDATA;
276 }
277 break;
278 case DEINT_ID_GENR:
279 if (ast->sub_packet_size <= 0 ||
280 ast->sub_packet_size > ast->audio_framesize)
281 return AVERROR_INVALIDDATA;
282 if (ast->audio_framesize % ast->sub_packet_size)
283 return AVERROR_INVALIDDATA;
284 break;
285 case DEINT_ID_SIPR:
286 case DEINT_ID_INT0:
287 case DEINT_ID_VBRS:
288 case DEINT_ID_VBRF:
289 break;
290 default:
291 av_log(s, AV_LOG_ERROR ,"Unknown interleaver %"PRIX32"\n", ast->deint_id);
292 return AVERROR_INVALIDDATA;
293 }
294 if (ast->deint_id == DEINT_ID_INT4 ||
295 ast->deint_id == DEINT_ID_GENR ||
296 ast->deint_id == DEINT_ID_SIPR) {
297 if (st->codecpar->block_align <= 0 ||
298 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
299 ast->audio_framesize * sub_packet_h < st->codecpar->block_align)
300 return AVERROR_INVALIDDATA;
301 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
302 return AVERROR(ENOMEM);
303 }
304
305 if (read_all) {
306 avio_r8(pb);
307 avio_r8(pb);
308 avio_r8(pb);
309 rm_read_metadata(s, pb, 0);
310 }
311 }
312 return 0;
313}
314
315int ff_rm_read_mdpr_codecdata(AVFormatContext *s, AVIOContext *pb,
316 AVStream *st, RMStream *rst,
317 unsigned int codec_data_size, const uint8_t *mime)
318{
319 unsigned int v;
320 int size;
321 int64_t codec_pos;
322 int ret;
323
324 if (codec_data_size > INT_MAX)
325 return AVERROR_INVALIDDATA;
326 if (codec_data_size == 0)
327 return 0;
328
329 avpriv_set_pts_info(st, 64, 1, 1000);
330 codec_pos = avio_tell(pb);
331 v = avio_rb32(pb);
332
333 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
334 /* ra type header */
335 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
336 return -1;
337 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
338 avio_seek(pb, -4, SEEK_CUR);
339 if ((ret = rm_read_extradata(s, pb, st->codecpar, codec_data_size)) < 0)
340 return ret;
341
342 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
343 st->codecpar->codec_tag = AV_RL32(st->codecpar->extradata);
344 st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
345 st->codecpar->codec_tag);
346 } else if(mime && !strcmp(mime, "logical-fileinfo")){
347 int stream_count, rule_count, property_count, i;
348 ff_free_stream(s, st);
349 if (avio_rb16(pb) != 0) {
350 av_log(s, AV_LOG_WARNING, "Unsupported version\n");
351 goto skip;
352 }
353 stream_count = avio_rb16(pb);
354 avio_skip(pb, 6*stream_count);
355 rule_count = avio_rb16(pb);
356 avio_skip(pb, 2*rule_count);
357 property_count = avio_rb16(pb);
358 for(i=0; i<property_count; i++){
359 uint8_t name[128], val[128];
360 avio_rb32(pb);
361 if (avio_rb16(pb) != 0) {
362 av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
363 goto skip; //FIXME skip just this one
364 }
365 get_str8(pb, name, sizeof(name));
366 switch(avio_rb32(pb)) {
367 case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
368 av_dict_set(&s->metadata, name, val, 0);
369 break;
370 default: avio_skip(pb, avio_rb16(pb));
371 }
372 }
373 } else {
374 int fps;
375 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
376 fail1:
377 av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
378 goto skip;
379 }
380 st->codecpar->codec_tag = avio_rl32(pb);
381 st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
382 st->codecpar->codec_tag);
383 av_log(s, AV_LOG_TRACE, "%"PRIX32" %X\n",
384 st->codecpar->codec_tag, MKTAG('R', 'V', '2', '0'));
385 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
386 goto fail1;
387 st->codecpar->width = avio_rb16(pb);
388 st->codecpar->height = avio_rb16(pb);
389 avio_skip(pb, 2); // looks like bits per sample
390 avio_skip(pb, 4); // always zero?
391 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
392 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
393 fps = avio_rb32(pb);
394
395 if ((ret = rm_read_extradata(s, pb, st->codecpar, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
396 return ret;
397
398 if (fps > 0) {
399 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
400 0x10000, fps, (1 << 30) - 1);
401#if FF_API_R_FRAME_RATE
402 st->r_frame_rate = st->avg_frame_rate;
403#endif
404 } else if (s->error_recognition & AV_EF_EXPLODE) {
405 av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
406 return AVERROR_INVALIDDATA;
407 }
408 }
409
410skip:
411 /* skip codec info */
412 size = avio_tell(pb) - codec_pos;
413 if (codec_data_size >= size) {
414 avio_skip(pb, codec_data_size - size);
415 } else {
416 av_log(s, AV_LOG_WARNING, "codec_data_size %u < size %d\n", codec_data_size, size);
417 }
418
419 return 0;
420}
421
422/** this function assumes that the demuxer has already seeked to the start
423 * of the INDX chunk, and will bail out if not. */
424static int rm_read_index(AVFormatContext *s)
425{
426 AVIOContext *pb = s->pb;
427 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
428 AVStream *st;
429
430 do {
431 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
432 return -1;
433 size = avio_rb32(pb);
434 if (size < 20)
435 return -1;
436 avio_skip(pb, 2);
437 n_pkts = avio_rb32(pb);
438 str_id = avio_rb16(pb);
439 next_off = avio_rb32(pb);
440 for (n = 0; n < s->nb_streams; n++)
441 if (s->streams[n]->id == str_id) {
442 st = s->streams[n];
443 break;
444 }
445 if (n == s->nb_streams) {
446 av_log(s, AV_LOG_ERROR,
447 "Invalid stream index %d for index at pos %"PRId64"\n",
448 str_id, avio_tell(pb));
449 goto skip;
450 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
451 av_log(s, AV_LOG_ERROR,
452 "Nr. of packets in packet index for stream index %d "
453 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
454 str_id, avio_size(pb), avio_tell(pb),
455 (avio_size(pb) - avio_tell(pb)) / 14);
456 goto skip;
457 }
458
459 for (n = 0; n < n_pkts; n++) {
460 avio_skip(pb, 2);
461 pts = avio_rb32(pb);
462 pos = avio_rb32(pb);
463 avio_skip(pb, 4); /* packet no. */
464
465 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
466 }
467
468skip:
469 if (next_off && avio_tell(pb) < next_off &&
470 avio_seek(pb, next_off, SEEK_SET) < 0) {
471 av_log(s, AV_LOG_ERROR,
472 "Non-linear index detected, not supported\n");
473 return -1;
474 }
475 } while (next_off);
476
477 return 0;
478}
479
480static int rm_read_header_old(AVFormatContext *s)
481{
482 RMDemuxContext *rm = s->priv_data;
483 AVStream *st;
484
485 rm->old_format = 1;
486 st = avformat_new_stream(s, NULL);
487 if (!st)
488 return -1;
489 st->priv_data = ff_rm_alloc_rmstream();
490 if (!st->priv_data)
491 return AVERROR(ENOMEM);
492 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
493}
494
495static int rm_read_multi(AVFormatContext *s, AVIOContext *pb,
496 AVStream *st, char *mime)
497{
498 int number_of_streams = avio_rb16(pb);
499 int number_of_mdpr;
500 int i, ret;
501 unsigned size2;
502 for (i = 0; i<number_of_streams; i++)
503 avio_rb16(pb);
504 number_of_mdpr = avio_rb16(pb);
505 if (number_of_mdpr != 1) {
506 avpriv_request_sample(s, "MLTI with multiple (%d) MDPR", number_of_mdpr);
507 }
508 for (i = 0; i < number_of_mdpr; i++) {
509 AVStream *st2;
510 if (i > 0) {
511 st2 = avformat_new_stream(s, NULL);
512 if (!st2) {
513 ret = AVERROR(ENOMEM);
514 return ret;
515 }
516 st2->id = st->id + (i<<16);
517 st2->codecpar->bit_rate = st->codecpar->bit_rate;
518 st2->start_time = st->start_time;
519 st2->duration = st->duration;
520 st2->codecpar->codec_type = AVMEDIA_TYPE_DATA;
521 st2->priv_data = ff_rm_alloc_rmstream();
522 if (!st2->priv_data)
523 return AVERROR(ENOMEM);
524 } else
525 st2 = st;
526
527 size2 = avio_rb32(pb);
528 ret = ff_rm_read_mdpr_codecdata(s, s->pb, st2, st2->priv_data,
529 size2, mime);
530 if (ret < 0)
531 return ret;
532 }
533 return 0;
534}
535
536static int rm_read_header(AVFormatContext *s)
537{
538 RMDemuxContext *rm = s->priv_data;
539 AVStream *st;
540 AVIOContext *pb = s->pb;
541 unsigned int tag;
542 int tag_size;
543 unsigned int start_time, duration;
544 unsigned int data_off = 0, indx_off = 0;
545 char buf[128], mime[128];
546 int flags = 0;
547 int ret = -1;
548 unsigned size, v;
549 int64_t codec_pos;
550
551 tag = avio_rl32(pb);
552 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
553 /* very old .ra format */
554 return rm_read_header_old(s);
555 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
556 return AVERROR(EIO);
557 }
558
559 tag_size = avio_rb32(pb);
560 avio_skip(pb, tag_size - 8);
561
562 for(;;) {
563 if (avio_feof(pb))
564 goto fail;
565 tag = avio_rl32(pb);
566 tag_size = avio_rb32(pb);
567 avio_rb16(pb);
568 av_log(s, AV_LOG_TRACE, "tag=%s size=%d\n",
569 av_fourcc2str(tag), tag_size);
570 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
571 goto fail;
572 switch(tag) {
573 case MKTAG('P', 'R', 'O', 'P'):
574 /* file header */
575 avio_rb32(pb); /* max bit rate */
576 avio_rb32(pb); /* avg bit rate */
577 avio_rb32(pb); /* max packet size */
578 avio_rb32(pb); /* avg packet size */
579 avio_rb32(pb); /* nb packets */
580 duration = avio_rb32(pb); /* duration */
581 s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
582 avio_rb32(pb); /* preroll */
583 indx_off = avio_rb32(pb); /* index offset */
584 data_off = avio_rb32(pb); /* data offset */
585 avio_rb16(pb); /* nb streams */
586 flags = avio_rb16(pb); /* flags */
587 break;
588 case MKTAG('C', 'O', 'N', 'T'):
589 rm_read_metadata(s, pb, 1);
590 break;
591 case MKTAG('M', 'D', 'P', 'R'):
592 st = avformat_new_stream(s, NULL);
593 if (!st) {
594 ret = AVERROR(ENOMEM);
595 goto fail;
596 }
597 st->id = avio_rb16(pb);
598 avio_rb32(pb); /* max bit rate */
599 st->codecpar->bit_rate = avio_rb32(pb); /* bit rate */
600 avio_rb32(pb); /* max packet size */
601 avio_rb32(pb); /* avg packet size */
602 start_time = avio_rb32(pb); /* start time */
603 avio_rb32(pb); /* preroll */
604 duration = avio_rb32(pb); /* duration */
605 st->start_time = start_time;
606 st->duration = duration;
607 if(duration>0)
608 s->duration = AV_NOPTS_VALUE;
609 get_str8(pb, buf, sizeof(buf)); /* desc */
610 get_str8(pb, mime, sizeof(mime)); /* mimetype */
611 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
612 st->priv_data = ff_rm_alloc_rmstream();
613 if (!st->priv_data)
614 return AVERROR(ENOMEM);
615
616 size = avio_rb32(pb);
617 codec_pos = avio_tell(pb);
618
619 ffio_ensure_seekback(pb, 4);
620 v = avio_rb32(pb);
621 if (v == MKBETAG('M', 'L', 'T', 'I')) {
622 ret = rm_read_multi(s, s->pb, st, mime);
623 if (ret < 0)
624 goto fail;
625 avio_seek(pb, codec_pos + size, SEEK_SET);
626 } else {
627 avio_skip(pb, -4);
628 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
629 size, mime) < 0)
630 goto fail;
631 }
632
633 break;
634 case MKTAG('D', 'A', 'T', 'A'):
635 goto header_end;
636 default:
637 /* unknown tag: skip it */
638 avio_skip(pb, tag_size - 10);
639 break;
640 }
641 }
642 header_end:
643 rm->nb_packets = avio_rb32(pb); /* number of packets */
644 if (!rm->nb_packets && (flags & 4))
645 rm->nb_packets = 3600 * 25;
646 avio_rb32(pb); /* next data header */
647
648 if (!data_off)
649 data_off = avio_tell(pb) - 18;
650 if (indx_off && (pb->seekable & AVIO_SEEKABLE_NORMAL) &&
651 !(s->flags & AVFMT_FLAG_IGNIDX) &&
652 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
653 rm_read_index(s);
654 avio_seek(pb, data_off + 18, SEEK_SET);
655 }
656
657 return 0;
658
659fail:
660 rm_read_close(s);
661 return ret;
662}
663
664static int get_num(AVIOContext *pb, int *len)
665{
666 int n, n1;
667
668 n = avio_rb16(pb);
669 (*len)-=2;
670 n &= 0x7FFF;
671 if (n >= 0x4000) {
672 return n - 0x4000;
673 } else {
674 n1 = avio_rb16(pb);
675 (*len)-=2;
676 return (n << 16) | n1;
677 }
678}
679
680/* multiple of 20 bytes for ra144 (ugly) */
681#define RAW_PACKET_SIZE 1000
682
683static int rm_sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
684 RMDemuxContext *rm = s->priv_data;
685 AVIOContext *pb = s->pb;
686 AVStream *st;
687 uint32_t state=0xFFFFFFFF;
688
689 while(!avio_feof(pb)){
690 int len, num, i;
691 int mlti_id;
692 *pos= avio_tell(pb) - 3;
693 if(rm->remaining_len > 0){
694 num= rm->current_stream;
695 mlti_id = 0;
696 len= rm->remaining_len;
697 *timestamp = AV_NOPTS_VALUE;
698 *flags= 0;
699 }else{
700 state= (state<<8) + avio_r8(pb);
701
702 if(state == MKBETAG('I', 'N', 'D', 'X')){
703 int n_pkts, expected_len;
704 len = avio_rb32(pb);
705 avio_skip(pb, 2);
706 n_pkts = avio_rb32(pb);
707 expected_len = 20 + n_pkts * 14;
708 if (len == 20)
709 /* some files don't add index entries to chunk size... */
710 len = expected_len;
711 else if (len != expected_len)
712 av_log(s, AV_LOG_WARNING,
713 "Index size %d (%d pkts) is wrong, should be %d.\n",
714 len, n_pkts, expected_len);
715 len -= 14; // we already read part of the index header
716 if(len<0)
717 continue;
718 goto skip;
719 } else if (state == MKBETAG('D','A','T','A')) {
720 av_log(s, AV_LOG_WARNING,
721 "DATA tag in middle of chunk, file may be broken.\n");
722 }
723
724 if(state > (unsigned)0xFFFF || state <= 12)
725 continue;
726 len=state - 12;
727 state= 0xFFFFFFFF;
728
729 num = avio_rb16(pb);
730 *timestamp = avio_rb32(pb);
731 mlti_id = (avio_r8(pb)>>1)-1<<16;
732 mlti_id = FFMAX(mlti_id, 0);
733 *flags = avio_r8(pb); /* flags */
734 }
735 for(i=0;i<s->nb_streams;i++) {
736 st = s->streams[i];
737 if (mlti_id + num == st->id)
738 break;
739 }
740 if (i == s->nb_streams) {
741skip:
742 /* skip packet if unknown number */
743 avio_skip(pb, len);
744 rm->remaining_len = 0;
745 continue;
746 }
747 *stream_index= i;
748
749 return len;
750 }
751 return -1;
752}
753
754static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
755 RMDemuxContext *rm, RMStream *vst,
756 AVPacket *pkt, int len, int *pseq,
757 int64_t *timestamp)
758{
759 int hdr;
760 int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silence compiler warning
761 int type;
762 int ret;
763
764 hdr = avio_r8(pb); len--;
765 type = hdr >> 6;
766
767 if(type != 3){ // not frame as a part of packet
768 seq = avio_r8(pb); len--;
769 }
770 if(type != 1){ // not whole frame
771 len2 = get_num(pb, &len);
772 pos = get_num(pb, &len);
773 pic_num = avio_r8(pb); len--;
774 }
775 if(len<0) {
776 av_log(s, AV_LOG_ERROR, "Insufficient data\n");
777 return -1;
778 }
779 rm->remaining_len = len;
780 if(type&1){ // frame, not slice
781 if(type == 3){ // frame as a part of packet
782 len= len2;
783 *timestamp = pos;
784 }
785 if(rm->remaining_len < len) {
786 av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
787 return -1;
788 }
789 rm->remaining_len -= len;
790 if(av_new_packet(pkt, len + 9) < 0)
791 return AVERROR(EIO);
792 pkt->data[0] = 0;
793 AV_WL32(pkt->data + 1, 1);
794 AV_WL32(pkt->data + 5, 0);
795 if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
796 av_packet_unref(pkt);
797 av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
798 return ret < 0 ? ret : AVERROR(EIO);
799 }
800 return 0;
801 }
802 //now we have to deal with single slice
803
804 *pseq = seq;
805 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
806 if (len2 > ffio_limit(pb, len2)) {
807 av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
808 return AVERROR_INVALIDDATA;
809 }
810 vst->slices = ((hdr & 0x3F) << 1) + 1;
811 vst->videobufsize = len2 + 8*vst->slices + 1;
812 av_packet_unref(&vst->pkt); //FIXME this should be output.
813 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
814 return AVERROR(ENOMEM);
815 memset(vst->pkt.data, 0, vst->pkt.size);
816 vst->videobufpos = 8*vst->slices + 1;
817 vst->cur_slice = 0;
818 vst->curpic_num = pic_num;
819 vst->pktpos = avio_tell(pb);
820 }
821 if(type == 2)
822 len = FFMIN(len, pos);
823
824 if(++vst->cur_slice > vst->slices) {
825 av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
826 return 1;
827 }
828 if(!vst->pkt.data)
829 return AVERROR(ENOMEM);
830 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
831 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
832 if(vst->videobufpos + len > vst->videobufsize) {
833 av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
834 return 1;
835 }
836 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
837 return AVERROR(EIO);
838 vst->videobufpos += len;
839 rm->remaining_len-= len;
840
841 if (type == 2 || vst->videobufpos == vst->videobufsize) {
842 vst->pkt.data[0] = vst->cur_slice-1;
843 *pkt= vst->pkt;
844 vst->pkt.data= NULL;
845 vst->pkt.size= 0;
846 vst->pkt.buf = NULL;
847 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
848 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
849 vst->videobufpos - 1 - 8*vst->slices);
850 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
851 pkt->pts = AV_NOPTS_VALUE;
852 pkt->pos = vst->pktpos;
853 vst->slices = 0;
854 return 0;
855 }
856
857 return 1;
858}
859
860static inline void
861rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
862{
863 uint8_t *ptr;
864 int j;
865
866 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
867 ptr = pkt->data;
868 for (j=0;j<pkt->size;j+=2) {
869 FFSWAP(int, ptr[0], ptr[1]);
870 ptr += 2;
871 }
872 }
873}
874
875static int readfull(AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n) {
876 int ret = avio_read(pb, dst, n);
877 if (ret != n) {
878 if (ret >= 0) memset(dst + ret, 0, n - ret);
879 else memset(dst , 0, n);
880 av_log(s, AV_LOG_ERROR, "Failed to fully read block\n");
881 }
882 return ret;
883}
884
885int
886ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
887 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
888 int *seq, int flags, int64_t timestamp)
889{
890 RMDemuxContext *rm = s->priv_data;
891 int ret;
892
893 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
894 rm->current_stream= st->id;
895 ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, &timestamp);
896 if(ret)
897 return ret < 0 ? ret : -1; //got partial frame or error
898 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
899 if ((ast->deint_id == DEINT_ID_GENR) ||
900 (ast->deint_id == DEINT_ID_INT4) ||
901 (ast->deint_id == DEINT_ID_SIPR)) {
902 int x;
903 int sps = ast->sub_packet_size;
904 int cfs = ast->coded_framesize;
905 int h = ast->sub_packet_h;
906 int y = ast->sub_packet_cnt;
907 int w = ast->audio_framesize;
908
909 if (flags & 2)
910 y = ast->sub_packet_cnt = 0;
911 if (!y)
912 ast->audiotimestamp = timestamp;
913
914 switch (ast->deint_id) {
915 case DEINT_ID_INT4:
916 for (x = 0; x < h/2; x++)
917 readfull(s, pb, ast->pkt.data+x*2*w+y*cfs, cfs);
918 break;
919 case DEINT_ID_GENR:
920 for (x = 0; x < w/sps; x++)
921 readfull(s, pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
922 break;
923 case DEINT_ID_SIPR:
924 readfull(s, pb, ast->pkt.data + y * w, w);
925 break;
926 }
927
928 if (++(ast->sub_packet_cnt) < h)
929 return -1;
930 if (ast->deint_id == DEINT_ID_SIPR)
931 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
932
933 ast->sub_packet_cnt = 0;
934 rm->audio_stream_num = st->index;
935 if (st->codecpar->block_align <= 0) {
936 av_log(s, AV_LOG_ERROR, "Invalid block alignment %d\n", st->codecpar->block_align);
937 return AVERROR_INVALIDDATA;
938 }
939 rm->audio_pkt_cnt = h * w / st->codecpar->block_align;
940 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
941 (ast->deint_id == DEINT_ID_VBRS)) {
942 int x;
943 rm->audio_stream_num = st->index;
944 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
945 if (ast->sub_packet_cnt) {
946 for (x = 0; x < ast->sub_packet_cnt; x++)
947 ast->sub_packet_lengths[x] = avio_rb16(pb);
948 rm->audio_pkt_cnt = ast->sub_packet_cnt;
949 ast->audiotimestamp = timestamp;
950 } else
951 return -1;
952 } else {
953 if ((ret = av_get_packet(pb, pkt, len)) < 0)
954 return ret;
955 rm_ac3_swap_bytes(st, pkt);
956 }
957 } else {
958 if ((ret = av_get_packet(pb, pkt, len)) < 0)
959 return ret;
960 }
961
962 pkt->stream_index = st->index;
963
964 pkt->pts = timestamp;
965 if (flags & 2)
966 pkt->flags |= AV_PKT_FLAG_KEY;
967
968 return st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
969}
970
971int
972ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
973 AVStream *st, RMStream *ast, AVPacket *pkt)
974{
975 RMDemuxContext *rm = s->priv_data;
976
977 av_assert0 (rm->audio_pkt_cnt > 0);
978
979 if (ast->deint_id == DEINT_ID_VBRF ||
980 ast->deint_id == DEINT_ID_VBRS) {
981 int ret = av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
982 if (ret < 0)
983 return ret;
984 } else {
985 int ret = av_new_packet(pkt, st->codecpar->block_align);
986 if (ret < 0)
987 return ret;
988 memcpy(pkt->data, ast->pkt.data + st->codecpar->block_align * //FIXME avoid this
989 (ast->sub_packet_h * ast->audio_framesize / st->codecpar->block_align - rm->audio_pkt_cnt),
990 st->codecpar->block_align);
991 }
992 rm->audio_pkt_cnt--;
993 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
994 ast->audiotimestamp = AV_NOPTS_VALUE;
995 pkt->flags = AV_PKT_FLAG_KEY;
996 } else
997 pkt->flags = 0;
998 pkt->stream_index = st->index;
999
1000 return rm->audio_pkt_cnt;
1001}
1002
1003static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
1004{
1005 RMDemuxContext *rm = s->priv_data;
1006 AVStream *st = NULL; // init to silence compiler warning
1007 int i, len, res, seq = 1;
1008 int64_t timestamp, pos;
1009 int flags;
1010
1011 for (;;) {
1012 if (rm->audio_pkt_cnt) {
1013 // If there are queued audio packet return them first
1014 st = s->streams[rm->audio_stream_num];
1015 res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
1016 if(res < 0)
1017 return res;
1018 flags = 0;
1019 } else {
1020 if (rm->old_format) {
1021 RMStream *ast;
1022
1023 st = s->streams[0];
1024 ast = st->priv_data;
1025 timestamp = AV_NOPTS_VALUE;
1026 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
1027 ast->coded_framesize * ast->sub_packet_h / 2;
1028 flags = (seq++ == 1) ? 2 : 0;
1029 pos = avio_tell(s->pb);
1030 } else {
1031 len = rm_sync(s, &timestamp, &flags, &i, &pos);
1032 if (len > 0)
1033 st = s->streams[i];
1034 }
1035
1036 if (avio_feof(s->pb))
1037 return AVERROR_EOF;
1038 if (len <= 0)
1039 return AVERROR(EIO);
1040
1041 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
1042 &seq, flags, timestamp);
1043 if (res < -1)
1044 return res;
1045 if((flags&2) && (seq&0x7F) == 1)
1046 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
1047 if (res)
1048 continue;
1049 }
1050
1051 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
1052 || st->discard >= AVDISCARD_ALL){
1053 av_packet_unref(pkt);
1054 } else
1055 break;
1056 }
1057
1058 return 0;
1059}
1060
1061static int rm_read_close(AVFormatContext *s)
1062{
1063 int i;
1064
1065 for (i=0;i<s->nb_streams;i++)
1066 ff_rm_free_rmstream(s->streams[i]->priv_data);
1067
1068 return 0;
1069}
1070
1071static int rm_probe(AVProbeData *p)
1072{
1073 /* check file header */
1074 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
1075 p->buf[2] == 'M' && p->buf[3] == 'F' &&
1076 p->buf[4] == 0 && p->buf[5] == 0) ||
1077 (p->buf[0] == '.' && p->buf[1] == 'r' &&
1078 p->buf[2] == 'a' && p->buf[3] == 0xfd))
1079 return AVPROBE_SCORE_MAX;
1080 else
1081 return 0;
1082}
1083
1084static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
1085 int64_t *ppos, int64_t pos_limit)
1086{
1087 RMDemuxContext *rm = s->priv_data;
1088 int64_t pos, dts;
1089 int stream_index2, flags, len, h;
1090
1091 pos = *ppos;
1092
1093 if(rm->old_format)
1094 return AV_NOPTS_VALUE;
1095
1096 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1097 return AV_NOPTS_VALUE;
1098
1099 rm->remaining_len=0;
1100 for(;;){
1101 int seq=1;
1102 AVStream *st;
1103
1104 len = rm_sync(s, &dts, &flags, &stream_index2, &pos);
1105 if(len<0)
1106 return AV_NOPTS_VALUE;
1107
1108 st = s->streams[stream_index2];
1109 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1110 h= avio_r8(s->pb); len--;
1111 if(!(h & 0x40)){
1112 seq = avio_r8(s->pb); len--;
1113 }
1114 }
1115
1116 if((flags&2) && (seq&0x7F) == 1){
1117 av_log(s, AV_LOG_TRACE, "%d %d-%d %"PRId64" %d\n",
1118 flags, stream_index2, stream_index, dts, seq);
1119 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1120 if(stream_index2 == stream_index)
1121 break;
1122 }
1123
1124 avio_skip(s->pb, len);
1125 }
1126 *ppos = pos;
1127 return dts;
1128}
1129
1130static int rm_read_seek(AVFormatContext *s, int stream_index,
1131 int64_t pts, int flags)
1132{
1133 RMDemuxContext *rm = s->priv_data;
1134
1135 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1136 return -1;
1137 rm->audio_pkt_cnt = 0;
1138 return 0;
1139}
1140
1141
1142AVInputFormat ff_rm_demuxer = {
1143 .name = "rm",
1144 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
1145 .priv_data_size = sizeof(RMDemuxContext),
1146 .read_probe = rm_probe,
1147 .read_header = rm_read_header,
1148 .read_packet = rm_read_packet,
1149 .read_close = rm_read_close,
1150 .read_timestamp = rm_read_dts,
1151 .read_seek = rm_read_seek,
1152};
1153
1154AVInputFormat ff_rdt_demuxer = {
1155 .name = "rdt",
1156 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
1157 .priv_data_size = sizeof(RMDemuxContext),
1158 .read_close = rm_read_close,
1159 .flags = AVFMT_NOFILE,
1160};
1161
1162static int ivr_probe(AVProbeData *p)
1163{
1164 if (memcmp(p->buf, ".R1M\x0\x1\x1", 7) &&
1165 memcmp(p->buf, ".REC", 4))
1166 return 0;
1167
1168 return AVPROBE_SCORE_MAX;
1169}
1170
1171static int ivr_read_header(AVFormatContext *s)
1172{
1173 unsigned tag, type, len, tlen, value;
1174 int i, j, n, count, nb_streams = 0, ret;
1175 uint8_t key[256], val[256];
1176 AVIOContext *pb = s->pb;
1177 AVStream *st;
1178 int64_t pos, offset, temp;
1179
1180 pos = avio_tell(pb);
1181 tag = avio_rl32(pb);
1182 if (tag == MKTAG('.','R','1','M')) {
1183 if (avio_rb16(pb) != 1)
1184 return AVERROR_INVALIDDATA;
1185 if (avio_r8(pb) != 1)
1186 return AVERROR_INVALIDDATA;
1187 len = avio_rb32(pb);
1188 avio_skip(pb, len);
1189 avio_skip(pb, 5);
1190 temp = avio_rb64(pb);
1191 while (!avio_feof(pb) && temp) {
1192 offset = temp;
1193 temp = avio_rb64(pb);
1194 }
1195 avio_skip(pb, offset - avio_tell(pb));
1196 if (avio_r8(pb) != 1)
1197 return AVERROR_INVALIDDATA;
1198 len = avio_rb32(pb);
1199 avio_skip(pb, len);
1200 if (avio_r8(pb) != 2)
1201 return AVERROR_INVALIDDATA;
1202 avio_skip(pb, 16);
1203 pos = avio_tell(pb);
1204 tag = avio_rl32(pb);
1205 }
1206
1207 if (tag != MKTAG('.','R','E','C'))
1208 return AVERROR_INVALIDDATA;
1209
1210 if (avio_r8(pb) != 0)
1211 return AVERROR_INVALIDDATA;
1212 count = avio_rb32(pb);
1213 for (i = 0; i < count; i++) {
1214 if (avio_feof(pb))
1215 return AVERROR_INVALIDDATA;
1216
1217 type = avio_r8(pb);
1218 tlen = avio_rb32(pb);
1219 avio_get_str(pb, tlen, key, sizeof(key));
1220 len = avio_rb32(pb);
1221 if (type == 5) {
1222 avio_get_str(pb, len, val, sizeof(val));
1223 av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val);
1224 } else if (type == 4) {
1225 av_log(s, AV_LOG_DEBUG, "%s = '0x", key);
1226 for (j = 0; j < len; j++)
1227 av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb));
1228 av_log(s, AV_LOG_DEBUG, "'\n");
1229 } else if (len == 4 && type == 3 && !strncmp(key, "StreamCount", tlen)) {
1230 nb_streams = value = avio_rb32(pb);
1231 } else if (len == 4 && type == 3) {
1232 value = avio_rb32(pb);
1233 av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value);
1234 } else {
1235 av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key);
1236 avio_skip(pb, len);
1237 }
1238 }
1239
1240 for (n = 0; n < nb_streams; n++) {
1241 st = avformat_new_stream(s, NULL);
1242 if (!st)
1243 return AVERROR(ENOMEM);
1244 st->priv_data = ff_rm_alloc_rmstream();
1245 if (!st->priv_data)
1246 return AVERROR(ENOMEM);
1247
1248 if (avio_r8(pb) != 1)
1249 return AVERROR_INVALIDDATA;
1250
1251 count = avio_rb32(pb);
1252 for (i = 0; i < count; i++) {
1253 if (avio_feof(pb))
1254 return AVERROR_INVALIDDATA;
1255
1256 type = avio_r8(pb);
1257 tlen = avio_rb32(pb);
1258 avio_get_str(pb, tlen, key, sizeof(key));
1259 len = avio_rb32(pb);
1260 if (type == 5) {
1261 avio_get_str(pb, len, val, sizeof(val));
1262 av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val);
1263 } else if (type == 4 && !strncmp(key, "OpaqueData", tlen)) {
1264 ret = ffio_ensure_seekback(pb, 4);
1265 if (ret < 0)
1266 return ret;
1267 if (avio_rb32(pb) == MKBETAG('M', 'L', 'T', 'I')) {
1268 ret = rm_read_multi(s, pb, st, NULL);
1269 } else {
1270 avio_seek(pb, -4, SEEK_CUR);
1271 ret = ff_rm_read_mdpr_codecdata(s, pb, st, st->priv_data, len, NULL);
1272 }
1273
1274 if (ret < 0)
1275 return ret;
1276 } else if (type == 4) {
1277 int j;
1278
1279 av_log(s, AV_LOG_DEBUG, "%s = '0x", key);
1280 for (j = 0; j < len; j++)
1281 av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb));
1282 av_log(s, AV_LOG_DEBUG, "'\n");
1283 } else if (len == 4 && type == 3 && !strncmp(key, "Duration", tlen)) {
1284 st->duration = avio_rb32(pb);
1285 } else if (len == 4 && type == 3) {
1286 value = avio_rb32(pb);
1287 av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value);
1288 } else {
1289 av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key);
1290 avio_skip(pb, len);
1291 }
1292 }
1293 }
1294
1295 if (avio_r8(pb) != 6)
1296 return AVERROR_INVALIDDATA;
1297 avio_skip(pb, 12);
1298 avio_skip(pb, avio_rb64(pb) + pos - avio_tell(s->pb));
1299 if (avio_r8(pb) != 8)
1300 return AVERROR_INVALIDDATA;
1301 avio_skip(pb, 8);
1302
1303 return 0;
1304}
1305
1306static int ivr_read_packet(AVFormatContext *s, AVPacket *pkt)
1307{
1308 RMDemuxContext *rm = s->priv_data;
1309 int ret = AVERROR_EOF, opcode;
1310 AVIOContext *pb = s->pb;
1311 unsigned size, index;
1312 int64_t pos, pts;
1313
1314 if (avio_feof(pb) || rm->data_end)
1315 return AVERROR_EOF;
1316
1317 pos = avio_tell(pb);
1318
1319 for (;;) {
1320 if (rm->audio_pkt_cnt) {
1321 // If there are queued audio packet return them first
1322 AVStream *st;
1323
1324 st = s->streams[rm->audio_stream_num];
1325 ret = ff_rm_retrieve_cache(s, pb, st, st->priv_data, pkt);
1326 if (ret < 0) {
1327 return ret;
1328 }
1329 } else {
1330 if (rm->remaining_len) {
1331 avio_skip(pb, rm->remaining_len);
1332 rm->remaining_len = 0;
1333 }
1334
1335 if (avio_feof(pb))
1336 return AVERROR_EOF;
1337
1338 opcode = avio_r8(pb);
1339 if (opcode == 2) {
1340 AVStream *st;
1341 int seq = 1;
1342
1343 pts = avio_rb32(pb);
1344 index = avio_rb16(pb);
1345 if (index >= s->nb_streams)
1346 return AVERROR_INVALIDDATA;
1347
1348 avio_skip(pb, 4);
1349 size = avio_rb32(pb);
1350 avio_skip(pb, 4);
1351
1352 if (size < 1 || size > INT_MAX/4) {
1353 av_log(s, AV_LOG_ERROR, "size %u is invalid\n", size);
1354 return AVERROR_INVALIDDATA;
1355 }
1356
1357 st = s->streams[index];
1358 ret = ff_rm_parse_packet(s, pb, st, st->priv_data, size, pkt,
1359 &seq, 0, pts);
1360 if (ret < -1) {
1361 return ret;
1362 } else if (ret) {
1363 continue;
1364 }
1365
1366 pkt->pos = pos;
1367 pkt->pts = pts;
1368 pkt->stream_index = index;
1369 } else if (opcode == 7) {
1370 pos = avio_rb64(pb);
1371 if (!pos) {
1372 rm->data_end = 1;
1373 return AVERROR_EOF;
1374 }
1375 } else {
1376 av_log(s, AV_LOG_ERROR, "Unsupported opcode=%d at %"PRIX64"\n", opcode, avio_tell(pb) - 1);
1377 return AVERROR(EIO);
1378 }
1379 }
1380
1381 break;
1382 }
1383
1384 return ret;
1385}
1386
1387AVInputFormat ff_ivr_demuxer = {
1388 .name = "ivr",
1389 .long_name = NULL_IF_CONFIG_SMALL("IVR (Internet Video Recording)"),
1390 .priv_data_size = sizeof(RMDemuxContext),
1391 .read_probe = ivr_probe,
1392 .read_header = ivr_read_header,
1393 .read_packet = ivr_read_packet,
1394 .read_close = rm_read_close,
1395 .extensions = "ivr",
1396};
1397
generated by cgit at 2024-05-17 03:41:38 (GMT)