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Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavformat / rmdec.c
CommitLineData
2ba45a60
DM		 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 {
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} RMDemuxContext;
67
68static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
69{
70 int i;
71 char *q, r;
72
73 q = buf;
74 for(i=0;i<len;i++) {
75 r = avio_r8(pb);
76 if (i < buf_size - 1)
77 *q++ = r;
78 }
79 if (buf_size > 0) *q = '\0';
80}
81
82static void get_str8(AVIOContext *pb, char *buf, int buf_size)
83{
84 get_strl(pb, buf, buf_size, avio_r8(pb));
85}
86
87static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
88{
89 if (size >= 1<<24)
90 return -1;
91 if (ff_get_extradata(avctx, pb, size) < 0)
92 return AVERROR(ENOMEM);
93 return 0;
94}
95
96static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
97{
98 char buf[1024];
99 int i;
100
101 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
102 int len = wide ? avio_rb16(pb) : avio_r8(pb);
103 get_strl(pb, buf, sizeof(buf), len);
104 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
105 }
106}
107
108RMStream *ff_rm_alloc_rmstream (void)
109{
110 RMStream *rms = av_mallocz(sizeof(RMStream));
111 rms->curpic_num = -1;
112 return rms;
113}
114
115void ff_rm_free_rmstream (RMStream *rms)
116{
117 av_free_packet(&rms->pkt);
118}
119
120static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
121 AVStream *st, RMStream *ast, int read_all)
122{
123 char buf[256];
124 uint32_t version;
125 int ret;
126
127 /* ra type header */
128 version = avio_rb16(pb); /* version */
129 if (version == 3) {
130 unsigned bytes_per_minute;
131 int header_size = avio_rb16(pb);
132 int64_t startpos = avio_tell(pb);
133 avio_skip(pb, 8);
134 bytes_per_minute = avio_rb16(pb);
135 avio_skip(pb, 4);
136 rm_read_metadata(s, pb, 0);
137 if ((startpos + header_size) >= avio_tell(pb) + 2) {
138 // fourcc (should always be "lpcJ")
139 avio_r8(pb);
140 get_str8(pb, buf, sizeof(buf));
141 }
142 // Skip extra header crap (this should never happen)
143 if ((startpos + header_size) > avio_tell(pb))
144 avio_skip(pb, header_size + startpos - avio_tell(pb));
145 if (bytes_per_minute)
146 st->codec->bit_rate = 8LL * bytes_per_minute / 60;
147 st->codec->sample_rate = 8000;
148 st->codec->channels = 1;
149 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
150 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
151 st->codec->codec_id = AV_CODEC_ID_RA_144;
152 ast->deint_id = DEINT_ID_INT0;
153 } else {
154 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
155 int codecdata_length;
156 unsigned bytes_per_minute;
157 /* old version (4) */
158 avio_skip(pb, 2); /* unused */
159 avio_rb32(pb); /* .ra4 */
160 avio_rb32(pb); /* data size */
161 avio_rb16(pb); /* version2 */
162 avio_rb32(pb); /* header size */
163 flavor= avio_rb16(pb); /* add codec info / flavor */
164 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
165 avio_rb32(pb); /* ??? */
166 bytes_per_minute = avio_rb32(pb);
167 if (version == 4) {
168 if (bytes_per_minute)
169 st->codec->bit_rate = 8LL * bytes_per_minute / 60;
170 }
171 avio_rb32(pb); /* ??? */
172 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
173 st->codec->block_align= avio_rb16(pb); /* frame size */
174 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
175 avio_rb16(pb); /* ??? */
176 if (version == 5) {
177 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
178 }
179 st->codec->sample_rate = avio_rb16(pb);
180 avio_rb32(pb);
181 st->codec->channels = avio_rb16(pb);
182 if (version == 5) {
183 ast->deint_id = avio_rl32(pb);
184 avio_read(pb, buf, 4);
185 buf[4] = 0;
186 } else {
187 AV_WL32(buf, 0);
188 get_str8(pb, buf, sizeof(buf)); /* desc */
189 ast->deint_id = AV_RL32(buf);
190 get_str8(pb, buf, sizeof(buf)); /* desc */
191 }
192 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
193 st->codec->codec_tag = AV_RL32(buf);
194 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
195 st->codec->codec_tag);
196
197 switch (st->codec->codec_id) {
198 case AV_CODEC_ID_AC3:
199 st->need_parsing = AVSTREAM_PARSE_FULL;
200 break;
201 case AV_CODEC_ID_RA_288:
202 st->codec->extradata_size= 0;
203 ast->audio_framesize = st->codec->block_align;
204 st->codec->block_align = coded_framesize;
205 break;
206 case AV_CODEC_ID_COOK:
207 st->need_parsing = AVSTREAM_PARSE_HEADERS;
208 case AV_CODEC_ID_ATRAC3:
209 case AV_CODEC_ID_SIPR:
210 if (read_all) {
211 codecdata_length = 0;
212 } else {
213 avio_rb16(pb); avio_r8(pb);
214 if (version == 5)
215 avio_r8(pb);
216 codecdata_length = avio_rb32(pb);
217 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
218 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
219 return -1;
220 }
221 }
222
223 ast->audio_framesize = st->codec->block_align;
224 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
225 if (flavor > 3) {
226 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
227 flavor);
228 return -1;
229 }
230 st->codec->block_align = ff_sipr_subpk_size[flavor];
231 } else {
232 if(sub_packet_size <= 0){
233 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
234 return -1;
235 }
236 st->codec->block_align = ast->sub_packet_size;
237 }
238 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
239 return ret;
240
241 break;
242 case AV_CODEC_ID_AAC:
243 avio_rb16(pb); avio_r8(pb);
244 if (version == 5)
245 avio_r8(pb);
246 codecdata_length = avio_rb32(pb);
247 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
248 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
249 return -1;
250 }
251 if (codecdata_length >= 1) {
252 avio_r8(pb);
253 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
254 return ret;
255 }
256 break;
257 }
258 switch (ast->deint_id) {
259 case DEINT_ID_INT4:
260 if (ast->coded_framesize > ast->audio_framesize ||
261 sub_packet_h <= 1 ||
262 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
263 return AVERROR_INVALIDDATA;
264 if (ast->coded_framesize * sub_packet_h != 2*ast->audio_framesize) {
265 avpriv_request_sample(s, "mismatching interleaver parameters");
266 return AVERROR_INVALIDDATA;
267 }
268 break;
269 case DEINT_ID_GENR:
270 if (ast->sub_packet_size <= 0 ||
271 ast->sub_packet_size > ast->audio_framesize)
272 return AVERROR_INVALIDDATA;
273 if (ast->audio_framesize % ast->sub_packet_size)
274 return AVERROR_INVALIDDATA;
275 break;
276 case DEINT_ID_SIPR:
277 case DEINT_ID_INT0:
278 case DEINT_ID_VBRS:
279 case DEINT_ID_VBRF:
280 break;
281 default:
282 av_log(s, AV_LOG_ERROR ,"Unknown interleaver %"PRIX32"\n", ast->deint_id);
283 return AVERROR_INVALIDDATA;
284 }
285 if (ast->deint_id == DEINT_ID_INT4 ||
286 ast->deint_id == DEINT_ID_GENR ||
287 ast->deint_id == DEINT_ID_SIPR) {
288 if (st->codec->block_align <= 0 ||
289 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
290 ast->audio_framesize * sub_packet_h < st->codec->block_align)
291 return AVERROR_INVALIDDATA;
292 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
293 return AVERROR(ENOMEM);
294 }
295
296 if (read_all) {
297 avio_r8(pb);
298 avio_r8(pb);
299 avio_r8(pb);
300 rm_read_metadata(s, pb, 0);
301 }
302 }
303 return 0;
304}
305
306int
307ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
308 AVStream *st, RMStream *rst, int codec_data_size, const uint8_t *mime)
309{
310 unsigned int v;
311 int size;
312 int64_t codec_pos;
313 int ret;
314
f6fa7814
DM		 315 if (codec_data_size < 0)
316 return AVERROR_INVALIDDATA;
317
2ba45a60
DM		 318 avpriv_set_pts_info(st, 64, 1, 1000);
319 codec_pos = avio_tell(pb);
320 v = avio_rb32(pb);
321
322 if (v == MKBETAG('M', 'L', 'T', 'I')) {
323 int number_of_streams = avio_rb16(pb);
324 int number_of_mdpr;
325 int i;
326 for (i = 0; i<number_of_streams; i++)
327 avio_rb16(pb);
328 number_of_mdpr = avio_rb16(pb);
329 if (number_of_mdpr != 1) {
330 avpriv_request_sample(s, "MLTI with multiple MDPR");
331 }
332 avio_rb32(pb);
333 v = avio_rb32(pb);
334 }
335
336 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
337 /* ra type header */
338 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
339 return -1;
340 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
341 avio_seek(pb, -4, SEEK_CUR);
342 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
343 return ret;
344
345 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
346 st->codec->codec_tag = AV_RL32(st->codec->extradata);
347 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
348 st->codec->codec_tag);
349 } else if(mime && !strcmp(mime, "logical-fileinfo")){
350 int stream_count, rule_count, property_count, i;
351 ff_free_stream(s, st);
352 if (avio_rb16(pb) != 0) {
353 av_log(s, AV_LOG_WARNING, "Unsupported version\n");
354 goto skip;
355 }
356 stream_count = avio_rb16(pb);
357 avio_skip(pb, 6*stream_count);
358 rule_count = avio_rb16(pb);
359 avio_skip(pb, 2*rule_count);
360 property_count = avio_rb16(pb);
361 for(i=0; i<property_count; i++){
362 uint8_t name[128], val[128];
363 avio_rb32(pb);
364 if (avio_rb16(pb) != 0) {
365 av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
366 goto skip; //FIXME skip just this one
367 }
368 get_str8(pb, name, sizeof(name));
369 switch(avio_rb32(pb)) {
370 case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
371 av_dict_set(&s->metadata, name, val, 0);
372 break;
373 default: avio_skip(pb, avio_rb16(pb));
374 }
375 }
376 } else {
377 int fps;
378 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
379 fail1:
380 av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
381 goto skip;
382 }
383 st->codec->codec_tag = avio_rl32(pb);
384 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
385 st->codec->codec_tag);
386 av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
387 if (st->codec->codec_id == AV_CODEC_ID_NONE)
388 goto fail1;
389 st->codec->width = avio_rb16(pb);
390 st->codec->height = avio_rb16(pb);
391 avio_skip(pb, 2); // looks like bits per sample
392 avio_skip(pb, 4); // always zero?
393 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
394 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
395 fps = avio_rb32(pb);
396
397 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
398 return ret;
399
400 if (fps > 0) {
401 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
402 0x10000, fps, (1 << 30) - 1);
403#if FF_API_R_FRAME_RATE
404 st->r_frame_rate = st->avg_frame_rate;
405#endif
406 } else if (s->error_recognition & AV_EF_EXPLODE) {
407 av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
408 return AVERROR_INVALIDDATA;
409 }
410 }
411
412skip:
413 /* skip codec info */
414 size = avio_tell(pb) - codec_pos;
415 avio_skip(pb, codec_data_size - size);
416
417 return 0;
418}
419
420/** this function assumes that the demuxer has already seeked to the start
421 * of the INDX chunk, and will bail out if not. */
422static int rm_read_index(AVFormatContext *s)
423{
424 AVIOContext *pb = s->pb;
425 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
426 AVStream *st;
427
428 do {
429 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
430 return -1;
431 size = avio_rb32(pb);
432 if (size < 20)
433 return -1;
434 avio_skip(pb, 2);
435 n_pkts = avio_rb32(pb);
436 str_id = avio_rb16(pb);
437 next_off = avio_rb32(pb);
438 for (n = 0; n < s->nb_streams; n++)
439 if (s->streams[n]->id == str_id) {
440 st = s->streams[n];
441 break;
442 }
443 if (n == s->nb_streams) {
444 av_log(s, AV_LOG_ERROR,
445 "Invalid stream index %d for index at pos %"PRId64"\n",
446 str_id, avio_tell(pb));
447 goto skip;
448 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
449 av_log(s, AV_LOG_ERROR,
450 "Nr. of packets in packet index for stream index %d "
451 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
452 str_id, avio_size(pb), avio_tell(pb),
453 (avio_size(pb) - avio_tell(pb)) / 14);
454 goto skip;
455 }
456
457 for (n = 0; n < n_pkts; n++) {
458 avio_skip(pb, 2);
459 pts = avio_rb32(pb);
460 pos = avio_rb32(pb);
461 avio_skip(pb, 4); /* packet no. */
462
463 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
464 }
465
466skip:
467 if (next_off && avio_tell(pb) < next_off &&
468 avio_seek(pb, next_off, SEEK_SET) < 0) {
469 av_log(s, AV_LOG_ERROR,
470 "Non-linear index detected, not supported\n");
471 return -1;
472 }
473 } while (next_off);
474
475 return 0;
476}
477
478static int rm_read_header_old(AVFormatContext *s)
479{
480 RMDemuxContext *rm = s->priv_data;
481 AVStream *st;
482
483 rm->old_format = 1;
484 st = avformat_new_stream(s, NULL);
485 if (!st)
486 return -1;
487 st->priv_data = ff_rm_alloc_rmstream();
488 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
489}
490
491static int rm_read_header(AVFormatContext *s)
492{
493 RMDemuxContext *rm = s->priv_data;
494 AVStream *st;
495 AVIOContext *pb = s->pb;
496 unsigned int tag;
497 int tag_size;
498 unsigned int start_time, duration;
499 unsigned int data_off = 0, indx_off = 0;
500 char buf[128], mime[128];
501 int flags = 0;
502
503 tag = avio_rl32(pb);
504 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
505 /* very old .ra format */
506 return rm_read_header_old(s);
507 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
508 return AVERROR(EIO);
509 }
510
511 tag_size = avio_rb32(pb);
512 avio_skip(pb, tag_size - 8);
513
514 for(;;) {
515 if (avio_feof(pb))
516 return -1;
517 tag = avio_rl32(pb);
518 tag_size = avio_rb32(pb);
519 avio_rb16(pb);
520 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
521 (tag ) & 0xff,
522 (tag >> 8) & 0xff,
523 (tag >> 16) & 0xff,
524 (tag >> 24) & 0xff,
525 tag,
526 tag_size);
527 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
528 return -1;
529 switch(tag) {
530 case MKTAG('P', 'R', 'O', 'P'):
531 /* file header */
532 avio_rb32(pb); /* max bit rate */
533 avio_rb32(pb); /* avg bit rate */
534 avio_rb32(pb); /* max packet size */
535 avio_rb32(pb); /* avg packet size */
536 avio_rb32(pb); /* nb packets */
537 duration = avio_rb32(pb); /* duration */
538 s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
539 avio_rb32(pb); /* preroll */
540 indx_off = avio_rb32(pb); /* index offset */
541 data_off = avio_rb32(pb); /* data offset */
542 avio_rb16(pb); /* nb streams */
543 flags = avio_rb16(pb); /* flags */
544 break;
545 case MKTAG('C', 'O', 'N', 'T'):
546 rm_read_metadata(s, pb, 1);
547 break;
548 case MKTAG('M', 'D', 'P', 'R'):
549 st = avformat_new_stream(s, NULL);
550 if (!st)
551 return AVERROR(ENOMEM);
552 st->id = avio_rb16(pb);
553 avio_rb32(pb); /* max bit rate */
554 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
555 avio_rb32(pb); /* max packet size */
556 avio_rb32(pb); /* avg packet size */
557 start_time = avio_rb32(pb); /* start time */
558 avio_rb32(pb); /* preroll */
559 duration = avio_rb32(pb); /* duration */
560 st->start_time = start_time;
561 st->duration = duration;
562 if(duration>0)
563 s->duration = AV_NOPTS_VALUE;
564 get_str8(pb, buf, sizeof(buf)); /* desc */
565 get_str8(pb, mime, sizeof(mime)); /* mimetype */
566 st->codec->codec_type = AVMEDIA_TYPE_DATA;
567 st->priv_data = ff_rm_alloc_rmstream();
568 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
569 avio_rb32(pb), mime) < 0)
570 return -1;
571 break;
572 case MKTAG('D', 'A', 'T', 'A'):
573 goto header_end;
574 default:
575 /* unknown tag: skip it */
576 avio_skip(pb, tag_size - 10);
577 break;
578 }
579 }
580 header_end:
581 rm->nb_packets = avio_rb32(pb); /* number of packets */
582 if (!rm->nb_packets && (flags & 4))
583 rm->nb_packets = 3600 * 25;
584 avio_rb32(pb); /* next data header */
585
586 if (!data_off)
587 data_off = avio_tell(pb) - 18;
588 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
589 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
590 rm_read_index(s);
591 avio_seek(pb, data_off + 18, SEEK_SET);
592 }
593
594 return 0;
595}
596
597static int get_num(AVIOContext *pb, int *len)
598{
599 int n, n1;
600
601 n = avio_rb16(pb);
602 (*len)-=2;
603 n &= 0x7FFF;
604 if (n >= 0x4000) {
605 return n - 0x4000;
606 } else {
607 n1 = avio_rb16(pb);
608 (*len)-=2;
609 return (n << 16) | n1;
610 }
611}
612
613/* multiple of 20 bytes for ra144 (ugly) */
614#define RAW_PACKET_SIZE 1000
615
f6fa7814 616static int rm_sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
2ba45a60
DM		 617 RMDemuxContext *rm = s->priv_data;
618 AVIOContext *pb = s->pb;
619 AVStream *st;
620 uint32_t state=0xFFFFFFFF;
621
622 while(!avio_feof(pb)){
623 int len, num, i;
624 *pos= avio_tell(pb) - 3;
625 if(rm->remaining_len > 0){
626 num= rm->current_stream;
627 len= rm->remaining_len;
628 *timestamp = AV_NOPTS_VALUE;
629 *flags= 0;
630 }else{
631 state= (state<<8) + avio_r8(pb);
632
633 if(state == MKBETAG('I', 'N', 'D', 'X')){
634 int n_pkts, expected_len;
635 len = avio_rb32(pb);
636 avio_skip(pb, 2);
637 n_pkts = avio_rb32(pb);
638 expected_len = 20 + n_pkts * 14;
639 if (len == 20)
640 /* some files don't add index entries to chunk size... */
641 len = expected_len;
642 else if (len != expected_len)
643 av_log(s, AV_LOG_WARNING,
644 "Index size %d (%d pkts) is wrong, should be %d.\n",
645 len, n_pkts, expected_len);
646 len -= 14; // we already read part of the index header
647 if(len<0)
648 continue;
649 goto skip;
650 } else if (state == MKBETAG('D','A','T','A')) {
651 av_log(s, AV_LOG_WARNING,
652 "DATA tag in middle of chunk, file may be broken.\n");
653 }
654
655 if(state > (unsigned)0xFFFF || state <= 12)
656 continue;
657 len=state - 12;
658 state= 0xFFFFFFFF;
659
660 num = avio_rb16(pb);
661 *timestamp = avio_rb32(pb);
662 avio_r8(pb); /* reserved */
663 *flags = avio_r8(pb); /* flags */
664 }
665 for(i=0;i<s->nb_streams;i++) {
666 st = s->streams[i];
667 if (num == st->id)
668 break;
669 }
670 if (i == s->nb_streams) {
671skip:
672 /* skip packet if unknown number */
673 avio_skip(pb, len);
674 rm->remaining_len = 0;
675 continue;
676 }
677 *stream_index= i;
678
679 return len;
680 }
681 return -1;
682}
683
684static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
685 RMDemuxContext *rm, RMStream *vst,
686 AVPacket *pkt, int len, int *pseq,
687 int64_t *timestamp)
688{
689 int hdr;
690 int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
691 int type;
692 int ret;
693
694 hdr = avio_r8(pb); len--;
695 type = hdr >> 6;
696
697 if(type != 3){ // not frame as a part of packet
698 seq = avio_r8(pb); len--;
699 }
700 if(type != 1){ // not whole frame
701 len2 = get_num(pb, &len);
702 pos = get_num(pb, &len);
703 pic_num = avio_r8(pb); len--;
704 }
705 if(len<0) {
706 av_log(s, AV_LOG_ERROR, "Insufficient data\n");
707 return -1;
708 }
709 rm->remaining_len = len;
710 if(type&1){ // frame, not slice
711 if(type == 3){ // frame as a part of packet
712 len= len2;
713 *timestamp = pos;
714 }
715 if(rm->remaining_len < len) {
716 av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
717 return -1;
718 }
719 rm->remaining_len -= len;
720 if(av_new_packet(pkt, len + 9) < 0)
721 return AVERROR(EIO);
722 pkt->data[0] = 0;
723 AV_WL32(pkt->data + 1, 1);
724 AV_WL32(pkt->data + 5, 0);
725 if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
726 av_free_packet(pkt);
727 av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
728 return ret < 0 ? ret : AVERROR(EIO);
729 }
730 return 0;
731 }
732 //now we have to deal with single slice
733
734 *pseq = seq;
735 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
736 if (len2 > ffio_limit(pb, len2)) {
737 av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
738 return AVERROR_INVALIDDATA;
739 }
740 vst->slices = ((hdr & 0x3F) << 1) + 1;
741 vst->videobufsize = len2 + 8*vst->slices + 1;
742 av_free_packet(&vst->pkt); //FIXME this should be output.
743 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
744 return AVERROR(ENOMEM);
745 memset(vst->pkt.data, 0, vst->pkt.size);
746 vst->videobufpos = 8*vst->slices + 1;
747 vst->cur_slice = 0;
748 vst->curpic_num = pic_num;
749 vst->pktpos = avio_tell(pb);
750 }
751 if(type == 2)
752 len = FFMIN(len, pos);
753
754 if(++vst->cur_slice > vst->slices) {
755 av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
756 return 1;
757 }
758 if(!vst->pkt.data)
759 return AVERROR(ENOMEM);
760 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
761 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
762 if(vst->videobufpos + len > vst->videobufsize) {
763 av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
764 return 1;
765 }
766 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
767 return AVERROR(EIO);
768 vst->videobufpos += len;
769 rm->remaining_len-= len;
770
771 if (type == 2 || vst->videobufpos == vst->videobufsize) {
772 vst->pkt.data[0] = vst->cur_slice-1;
773 *pkt= vst->pkt;
774 vst->pkt.data= NULL;
775 vst->pkt.size= 0;
776 vst->pkt.buf = NULL;
777#if FF_API_DESTRUCT_PACKET
778FF_DISABLE_DEPRECATION_WARNINGS
779 vst->pkt.destruct = NULL;
780FF_ENABLE_DEPRECATION_WARNINGS
781#endif
782 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
783 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
784 vst->videobufpos - 1 - 8*vst->slices);
785 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
786 pkt->pts = AV_NOPTS_VALUE;
787 pkt->pos = vst->pktpos;
788 vst->slices = 0;
789 return 0;
790 }
791
792 return 1;
793}
794
795static inline void
796rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
797{
798 uint8_t *ptr;
799 int j;
800
801 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
802 ptr = pkt->data;
803 for (j=0;j<pkt->size;j+=2) {
804 FFSWAP(int, ptr[0], ptr[1]);
805 ptr += 2;
806 }
807 }
808}
809
810static int readfull(AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n) {
811 int ret = avio_read(pb, dst, n);
812 if (ret != n) {
813 if (ret >= 0) memset(dst + ret, 0, n - ret);
814 else memset(dst , 0, n);
815 av_log(s, AV_LOG_ERROR, "Failed to fully read block\n");
816 }
817 return ret;
818}
819
820int
821ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
822 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
823 int *seq, int flags, int64_t timestamp)
824{
825 RMDemuxContext *rm = s->priv_data;
826 int ret;
827
828 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
829 rm->current_stream= st->id;
830 ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, &timestamp);
831 if(ret)
832 return ret < 0 ? ret : -1; //got partial frame or error
833 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
834 if ((ast->deint_id == DEINT_ID_GENR) ||
835 (ast->deint_id == DEINT_ID_INT4) ||
836 (ast->deint_id == DEINT_ID_SIPR)) {
837 int x;
838 int sps = ast->sub_packet_size;
839 int cfs = ast->coded_framesize;
840 int h = ast->sub_packet_h;
841 int y = ast->sub_packet_cnt;
842 int w = ast->audio_framesize;
843
844 if (flags & 2)
845 y = ast->sub_packet_cnt = 0;
846 if (!y)
847 ast->audiotimestamp = timestamp;
848
849 switch (ast->deint_id) {
850 case DEINT_ID_INT4:
851 for (x = 0; x < h/2; x++)
852 readfull(s, pb, ast->pkt.data+x*2*w+y*cfs, cfs);
853 break;
854 case DEINT_ID_GENR:
855 for (x = 0; x < w/sps; x++)
856 readfull(s, pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
857 break;
858 case DEINT_ID_SIPR:
859 readfull(s, pb, ast->pkt.data + y * w, w);
860 break;
861 }
862
863 if (++(ast->sub_packet_cnt) < h)
864 return -1;
865 if (ast->deint_id == DEINT_ID_SIPR)
866 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
867
868 ast->sub_packet_cnt = 0;
869 rm->audio_stream_num = st->index;
870 rm->audio_pkt_cnt = h * w / st->codec->block_align;
871 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
872 (ast->deint_id == DEINT_ID_VBRS)) {
873 int x;
874 rm->audio_stream_num = st->index;
875 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
876 if (ast->sub_packet_cnt) {
877 for (x = 0; x < ast->sub_packet_cnt; x++)
878 ast->sub_packet_lengths[x] = avio_rb16(pb);
879 rm->audio_pkt_cnt = ast->sub_packet_cnt;
880 ast->audiotimestamp = timestamp;
881 } else
882 return -1;
883 } else {
884 av_get_packet(pb, pkt, len);
885 rm_ac3_swap_bytes(st, pkt);
886 }
887 } else
888 av_get_packet(pb, pkt, len);
889
890 pkt->stream_index = st->index;
891
892#if 0
893 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
894 if(st->codec->codec_id == AV_CODEC_ID_RV20){
895 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
896 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
897
898 seq |= (timestamp&~0x3FFF);
899 if(seq - timestamp > 0x2000) seq -= 0x4000;
900 if(seq - timestamp < -0x2000) seq += 0x4000;
901 }
902 }
903#endif
904
905 pkt->pts = timestamp;
906 if (flags & 2)
907 pkt->flags |= AV_PKT_FLAG_KEY;
908
909 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
910}
911
912int
913ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
914 AVStream *st, RMStream *ast, AVPacket *pkt)
915{
916 RMDemuxContext *rm = s->priv_data;
917
918 av_assert0 (rm->audio_pkt_cnt > 0);
919
920 if (ast->deint_id == DEINT_ID_VBRF ||
921 ast->deint_id == DEINT_ID_VBRS)
922 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
923 else {
f6fa7814
DM		 924 int ret = av_new_packet(pkt, st->codec->block_align);
925 if (ret < 0)
926 return ret;
2ba45a60
DM		 927 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
928 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
929 st->codec->block_align);
930 }
931 rm->audio_pkt_cnt--;
932 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
933 ast->audiotimestamp = AV_NOPTS_VALUE;
934 pkt->flags = AV_PKT_FLAG_KEY;
935 } else
936 pkt->flags = 0;
937 pkt->stream_index = st->index;
938
939 return rm->audio_pkt_cnt;
940}
941
942static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
943{
944 RMDemuxContext *rm = s->priv_data;
945 AVStream *st = NULL; // init to silence compiler warning
946 int i, len, res, seq = 1;
947 int64_t timestamp, pos;
948 int flags;
949
950 for (;;) {
951 if (rm->audio_pkt_cnt) {
952 // If there are queued audio packet return them first
953 st = s->streams[rm->audio_stream_num];
954 res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
955 if(res < 0)
956 return res;
957 flags = 0;
958 } else {
959 if (rm->old_format) {
960 RMStream *ast;
961
962 st = s->streams[0];
963 ast = st->priv_data;
964 timestamp = AV_NOPTS_VALUE;
965 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
966 ast->coded_framesize * ast->sub_packet_h / 2;
967 flags = (seq++ == 1) ? 2 : 0;
968 pos = avio_tell(s->pb);
969 } else {
f6fa7814 970 len = rm_sync(s, &timestamp, &flags, &i, &pos);
2ba45a60
DM		 971 if (len > 0)
972 st = s->streams[i];
973 }
974
f6fa7814 975 if (len <= 0 || avio_feof(s->pb))
2ba45a60
DM		 976 return AVERROR(EIO);
977
978 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
979 &seq, flags, timestamp);
980 if (res < -1)
981 return res;
982 if((flags&2) && (seq&0x7F) == 1)
983 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
984 if (res)
985 continue;
986 }
987
988 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
989 || st->discard >= AVDISCARD_ALL){
990 av_free_packet(pkt);
991 } else
992 break;
993 }
994
995 return 0;
996}
997
998static int rm_read_close(AVFormatContext *s)
999{
1000 int i;
1001
1002 for (i=0;i<s->nb_streams;i++)
1003 ff_rm_free_rmstream(s->streams[i]->priv_data);
1004
1005 return 0;
1006}
1007
1008static int rm_probe(AVProbeData *p)
1009{
1010 /* check file header */
1011 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
1012 p->buf[2] == 'M' && p->buf[3] == 'F' &&
1013 p->buf[4] == 0 && p->buf[5] == 0) ||
1014 (p->buf[0] == '.' && p->buf[1] == 'r' &&
1015 p->buf[2] == 'a' && p->buf[3] == 0xfd))
1016 return AVPROBE_SCORE_MAX;
1017 else
1018 return 0;
1019}
1020
1021static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
1022 int64_t *ppos, int64_t pos_limit)
1023{
1024 RMDemuxContext *rm = s->priv_data;
1025 int64_t pos, dts;
1026 int stream_index2, flags, len, h;
1027
1028 pos = *ppos;
1029
1030 if(rm->old_format)
1031 return AV_NOPTS_VALUE;
1032
1033 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1034 return AV_NOPTS_VALUE;
1035
1036 rm->remaining_len=0;
1037 for(;;){
1038 int seq=1;
1039 AVStream *st;
1040
f6fa7814 1041 len = rm_sync(s, &dts, &flags, &stream_index2, &pos);
2ba45a60
DM		 1042 if(len<0)
1043 return AV_NOPTS_VALUE;
1044
1045 st = s->streams[stream_index2];
1046 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1047 h= avio_r8(s->pb); len--;
1048 if(!(h & 0x40)){
1049 seq = avio_r8(s->pb); len--;
1050 }
1051 }
1052
1053 if((flags&2) && (seq&0x7F) == 1){
1054 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
1055 flags, stream_index2, stream_index, dts, seq);
1056 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1057 if(stream_index2 == stream_index)
1058 break;
1059 }
1060
1061 avio_skip(s->pb, len);
1062 }
1063 *ppos = pos;
1064 return dts;
1065}
1066
1067static int rm_read_seek(AVFormatContext *s, int stream_index,
1068 int64_t pts, int flags)
1069{
1070 RMDemuxContext *rm = s->priv_data;
1071
1072 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1073 return -1;
1074 rm->audio_pkt_cnt = 0;
1075 return 0;
1076}
1077
1078
1079AVInputFormat ff_rm_demuxer = {
1080 .name = "rm",
1081 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
1082 .priv_data_size = sizeof(RMDemuxContext),
1083 .read_probe = rm_probe,
1084 .read_header = rm_read_header,
1085 .read_packet = rm_read_packet,
1086 .read_close = rm_read_close,
1087 .read_timestamp = rm_read_dts,
1088 .read_seek = rm_read_seek,
1089};
1090
1091AVInputFormat ff_rdt_demuxer = {
1092 .name = "rdt",
1093 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
1094 .priv_data_size = sizeof(RMDemuxContext),
1095 .read_close = rm_read_close,
1096 .flags = AVFMT_NOFILE,
1097};
ffmpeg Piment Noir Debian package repository