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Imported Debian version 2.4.3~trusty1
[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
315 avpriv_set_pts_info(st, 64, 1, 1000);
316 codec_pos = avio_tell(pb);
317 v = avio_rb32(pb);
318
319 if (v == MKBETAG('M', 'L', 'T', 'I')) {
320 int number_of_streams = avio_rb16(pb);
321 int number_of_mdpr;
322 int i;
323 for (i = 0; i<number_of_streams; i++)
324 avio_rb16(pb);
325 number_of_mdpr = avio_rb16(pb);
326 if (number_of_mdpr != 1) {
327 avpriv_request_sample(s, "MLTI with multiple MDPR");
328 }
329 avio_rb32(pb);
330 v = avio_rb32(pb);
331 }
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(pb, st->codec, codec_data_size)) < 0)
340 return ret;
341
342 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
343 st->codec->codec_tag = AV_RL32(st->codec->extradata);
344 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
345 st->codec->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->codec->codec_tag = avio_rl32(pb);
381 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
382 st->codec->codec_tag);
383 av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
384 if (st->codec->codec_id == AV_CODEC_ID_NONE)
385 goto fail1;
386 st->codec->width = avio_rb16(pb);
387 st->codec->height = avio_rb16(pb);
388 avio_skip(pb, 2); // looks like bits per sample
389 avio_skip(pb, 4); // always zero?
390 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
391 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
392 fps = avio_rb32(pb);
393
394 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
395 return ret;
396
397 if (fps > 0) {
398 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
399 0x10000, fps, (1 << 30) - 1);
400#if FF_API_R_FRAME_RATE
401 st->r_frame_rate = st->avg_frame_rate;
402#endif
403 } else if (s->error_recognition & AV_EF_EXPLODE) {
404 av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
405 return AVERROR_INVALIDDATA;
406 }
407 }
408
409skip:
410 /* skip codec info */
411 size = avio_tell(pb) - codec_pos;
412 avio_skip(pb, codec_data_size - size);
413
414 return 0;
415}
416
417/** this function assumes that the demuxer has already seeked to the start
418 * of the INDX chunk, and will bail out if not. */
419static int rm_read_index(AVFormatContext *s)
420{
421 AVIOContext *pb = s->pb;
422 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
423 AVStream *st;
424
425 do {
426 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
427 return -1;
428 size = avio_rb32(pb);
429 if (size < 20)
430 return -1;
431 avio_skip(pb, 2);
432 n_pkts = avio_rb32(pb);
433 str_id = avio_rb16(pb);
434 next_off = avio_rb32(pb);
435 for (n = 0; n < s->nb_streams; n++)
436 if (s->streams[n]->id == str_id) {
437 st = s->streams[n];
438 break;
439 }
440 if (n == s->nb_streams) {
441 av_log(s, AV_LOG_ERROR,
442 "Invalid stream index %d for index at pos %"PRId64"\n",
443 str_id, avio_tell(pb));
444 goto skip;
445 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
446 av_log(s, AV_LOG_ERROR,
447 "Nr. of packets in packet index for stream index %d "
448 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
449 str_id, avio_size(pb), avio_tell(pb),
450 (avio_size(pb) - avio_tell(pb)) / 14);
451 goto skip;
452 }
453
454 for (n = 0; n < n_pkts; n++) {
455 avio_skip(pb, 2);
456 pts = avio_rb32(pb);
457 pos = avio_rb32(pb);
458 avio_skip(pb, 4); /* packet no. */
459
460 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
461 }
462
463skip:
464 if (next_off && avio_tell(pb) < next_off &&
465 avio_seek(pb, next_off, SEEK_SET) < 0) {
466 av_log(s, AV_LOG_ERROR,
467 "Non-linear index detected, not supported\n");
468 return -1;
469 }
470 } while (next_off);
471
472 return 0;
473}
474
475static int rm_read_header_old(AVFormatContext *s)
476{
477 RMDemuxContext *rm = s->priv_data;
478 AVStream *st;
479
480 rm->old_format = 1;
481 st = avformat_new_stream(s, NULL);
482 if (!st)
483 return -1;
484 st->priv_data = ff_rm_alloc_rmstream();
485 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
486}
487
488static int rm_read_header(AVFormatContext *s)
489{
490 RMDemuxContext *rm = s->priv_data;
491 AVStream *st;
492 AVIOContext *pb = s->pb;
493 unsigned int tag;
494 int tag_size;
495 unsigned int start_time, duration;
496 unsigned int data_off = 0, indx_off = 0;
497 char buf[128], mime[128];
498 int flags = 0;
499
500 tag = avio_rl32(pb);
501 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
502 /* very old .ra format */
503 return rm_read_header_old(s);
504 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
505 return AVERROR(EIO);
506 }
507
508 tag_size = avio_rb32(pb);
509 avio_skip(pb, tag_size - 8);
510
511 for(;;) {
512 if (avio_feof(pb))
513 return -1;
514 tag = avio_rl32(pb);
515 tag_size = avio_rb32(pb);
516 avio_rb16(pb);
517 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
518 (tag ) & 0xff,
519 (tag >> 8) & 0xff,
520 (tag >> 16) & 0xff,
521 (tag >> 24) & 0xff,
522 tag,
523 tag_size);
524 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
525 return -1;
526 switch(tag) {
527 case MKTAG('P', 'R', 'O', 'P'):
528 /* file header */
529 avio_rb32(pb); /* max bit rate */
530 avio_rb32(pb); /* avg bit rate */
531 avio_rb32(pb); /* max packet size */
532 avio_rb32(pb); /* avg packet size */
533 avio_rb32(pb); /* nb packets */
534 duration = avio_rb32(pb); /* duration */
535 s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
536 avio_rb32(pb); /* preroll */
537 indx_off = avio_rb32(pb); /* index offset */
538 data_off = avio_rb32(pb); /* data offset */
539 avio_rb16(pb); /* nb streams */
540 flags = avio_rb16(pb); /* flags */
541 break;
542 case MKTAG('C', 'O', 'N', 'T'):
543 rm_read_metadata(s, pb, 1);
544 break;
545 case MKTAG('M', 'D', 'P', 'R'):
546 st = avformat_new_stream(s, NULL);
547 if (!st)
548 return AVERROR(ENOMEM);
549 st->id = avio_rb16(pb);
550 avio_rb32(pb); /* max bit rate */
551 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
552 avio_rb32(pb); /* max packet size */
553 avio_rb32(pb); /* avg packet size */
554 start_time = avio_rb32(pb); /* start time */
555 avio_rb32(pb); /* preroll */
556 duration = avio_rb32(pb); /* duration */
557 st->start_time = start_time;
558 st->duration = duration;
559 if(duration>0)
560 s->duration = AV_NOPTS_VALUE;
561 get_str8(pb, buf, sizeof(buf)); /* desc */
562 get_str8(pb, mime, sizeof(mime)); /* mimetype */
563 st->codec->codec_type = AVMEDIA_TYPE_DATA;
564 st->priv_data = ff_rm_alloc_rmstream();
565 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
566 avio_rb32(pb), mime) < 0)
567 return -1;
568 break;
569 case MKTAG('D', 'A', 'T', 'A'):
570 goto header_end;
571 default:
572 /* unknown tag: skip it */
573 avio_skip(pb, tag_size - 10);
574 break;
575 }
576 }
577 header_end:
578 rm->nb_packets = avio_rb32(pb); /* number of packets */
579 if (!rm->nb_packets && (flags & 4))
580 rm->nb_packets = 3600 * 25;
581 avio_rb32(pb); /* next data header */
582
583 if (!data_off)
584 data_off = avio_tell(pb) - 18;
585 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
586 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
587 rm_read_index(s);
588 avio_seek(pb, data_off + 18, SEEK_SET);
589 }
590
591 return 0;
592}
593
594static int get_num(AVIOContext *pb, int *len)
595{
596 int n, n1;
597
598 n = avio_rb16(pb);
599 (*len)-=2;
600 n &= 0x7FFF;
601 if (n >= 0x4000) {
602 return n - 0x4000;
603 } else {
604 n1 = avio_rb16(pb);
605 (*len)-=2;
606 return (n << 16) | n1;
607 }
608}
609
610/* multiple of 20 bytes for ra144 (ugly) */
611#define RAW_PACKET_SIZE 1000
612
613static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
614 RMDemuxContext *rm = s->priv_data;
615 AVIOContext *pb = s->pb;
616 AVStream *st;
617 uint32_t state=0xFFFFFFFF;
618
619 while(!avio_feof(pb)){
620 int len, num, i;
621 *pos= avio_tell(pb) - 3;
622 if(rm->remaining_len > 0){
623 num= rm->current_stream;
624 len= rm->remaining_len;
625 *timestamp = AV_NOPTS_VALUE;
626 *flags= 0;
627 }else{
628 state= (state<<8) + avio_r8(pb);
629
630 if(state == MKBETAG('I', 'N', 'D', 'X')){
631 int n_pkts, expected_len;
632 len = avio_rb32(pb);
633 avio_skip(pb, 2);
634 n_pkts = avio_rb32(pb);
635 expected_len = 20 + n_pkts * 14;
636 if (len == 20)
637 /* some files don't add index entries to chunk size... */
638 len = expected_len;
639 else if (len != expected_len)
640 av_log(s, AV_LOG_WARNING,
641 "Index size %d (%d pkts) is wrong, should be %d.\n",
642 len, n_pkts, expected_len);
643 len -= 14; // we already read part of the index header
644 if(len<0)
645 continue;
646 goto skip;
647 } else if (state == MKBETAG('D','A','T','A')) {
648 av_log(s, AV_LOG_WARNING,
649 "DATA tag in middle of chunk, file may be broken.\n");
650 }
651
652 if(state > (unsigned)0xFFFF || state <= 12)
653 continue;
654 len=state - 12;
655 state= 0xFFFFFFFF;
656
657 num = avio_rb16(pb);
658 *timestamp = avio_rb32(pb);
659 avio_r8(pb); /* reserved */
660 *flags = avio_r8(pb); /* flags */
661 }
662 for(i=0;i<s->nb_streams;i++) {
663 st = s->streams[i];
664 if (num == st->id)
665 break;
666 }
667 if (i == s->nb_streams) {
668skip:
669 /* skip packet if unknown number */
670 avio_skip(pb, len);
671 rm->remaining_len = 0;
672 continue;
673 }
674 *stream_index= i;
675
676 return len;
677 }
678 return -1;
679}
680
681static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
682 RMDemuxContext *rm, RMStream *vst,
683 AVPacket *pkt, int len, int *pseq,
684 int64_t *timestamp)
685{
686 int hdr;
687 int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
688 int type;
689 int ret;
690
691 hdr = avio_r8(pb); len--;
692 type = hdr >> 6;
693
694 if(type != 3){ // not frame as a part of packet
695 seq = avio_r8(pb); len--;
696 }
697 if(type != 1){ // not whole frame
698 len2 = get_num(pb, &len);
699 pos = get_num(pb, &len);
700 pic_num = avio_r8(pb); len--;
701 }
702 if(len<0) {
703 av_log(s, AV_LOG_ERROR, "Insufficient data\n");
704 return -1;
705 }
706 rm->remaining_len = len;
707 if(type&1){ // frame, not slice
708 if(type == 3){ // frame as a part of packet
709 len= len2;
710 *timestamp = pos;
711 }
712 if(rm->remaining_len < len) {
713 av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
714 return -1;
715 }
716 rm->remaining_len -= len;
717 if(av_new_packet(pkt, len + 9) < 0)
718 return AVERROR(EIO);
719 pkt->data[0] = 0;
720 AV_WL32(pkt->data + 1, 1);
721 AV_WL32(pkt->data + 5, 0);
722 if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
723 av_free_packet(pkt);
724 av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
725 return ret < 0 ? ret : AVERROR(EIO);
726 }
727 return 0;
728 }
729 //now we have to deal with single slice
730
731 *pseq = seq;
732 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
733 if (len2 > ffio_limit(pb, len2)) {
734 av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
735 return AVERROR_INVALIDDATA;
736 }
737 vst->slices = ((hdr & 0x3F) << 1) + 1;
738 vst->videobufsize = len2 + 8*vst->slices + 1;
739 av_free_packet(&vst->pkt); //FIXME this should be output.
740 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
741 return AVERROR(ENOMEM);
742 memset(vst->pkt.data, 0, vst->pkt.size);
743 vst->videobufpos = 8*vst->slices + 1;
744 vst->cur_slice = 0;
745 vst->curpic_num = pic_num;
746 vst->pktpos = avio_tell(pb);
747 }
748 if(type == 2)
749 len = FFMIN(len, pos);
750
751 if(++vst->cur_slice > vst->slices) {
752 av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
753 return 1;
754 }
755 if(!vst->pkt.data)
756 return AVERROR(ENOMEM);
757 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
758 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
759 if(vst->videobufpos + len > vst->videobufsize) {
760 av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
761 return 1;
762 }
763 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
764 return AVERROR(EIO);
765 vst->videobufpos += len;
766 rm->remaining_len-= len;
767
768 if (type == 2 || vst->videobufpos == vst->videobufsize) {
769 vst->pkt.data[0] = vst->cur_slice-1;
770 *pkt= vst->pkt;
771 vst->pkt.data= NULL;
772 vst->pkt.size= 0;
773 vst->pkt.buf = NULL;
774#if FF_API_DESTRUCT_PACKET
775FF_DISABLE_DEPRECATION_WARNINGS
776 vst->pkt.destruct = NULL;
777FF_ENABLE_DEPRECATION_WARNINGS
778#endif
779 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
780 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
781 vst->videobufpos - 1 - 8*vst->slices);
782 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
783 pkt->pts = AV_NOPTS_VALUE;
784 pkt->pos = vst->pktpos;
785 vst->slices = 0;
786 return 0;
787 }
788
789 return 1;
790}
791
792static inline void
793rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
794{
795 uint8_t *ptr;
796 int j;
797
798 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
799 ptr = pkt->data;
800 for (j=0;j<pkt->size;j+=2) {
801 FFSWAP(int, ptr[0], ptr[1]);
802 ptr += 2;
803 }
804 }
805}
806
807static int readfull(AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n) {
808 int ret = avio_read(pb, dst, n);
809 if (ret != n) {
810 if (ret >= 0) memset(dst + ret, 0, n - ret);
811 else memset(dst , 0, n);
812 av_log(s, AV_LOG_ERROR, "Failed to fully read block\n");
813 }
814 return ret;
815}
816
817int
818ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
819 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
820 int *seq, int flags, int64_t timestamp)
821{
822 RMDemuxContext *rm = s->priv_data;
823 int ret;
824
825 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
826 rm->current_stream= st->id;
827 ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, &timestamp);
828 if(ret)
829 return ret < 0 ? ret : -1; //got partial frame or error
830 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
831 if ((ast->deint_id == DEINT_ID_GENR) ||
832 (ast->deint_id == DEINT_ID_INT4) ||
833 (ast->deint_id == DEINT_ID_SIPR)) {
834 int x;
835 int sps = ast->sub_packet_size;
836 int cfs = ast->coded_framesize;
837 int h = ast->sub_packet_h;
838 int y = ast->sub_packet_cnt;
839 int w = ast->audio_framesize;
840
841 if (flags & 2)
842 y = ast->sub_packet_cnt = 0;
843 if (!y)
844 ast->audiotimestamp = timestamp;
845
846 switch (ast->deint_id) {
847 case DEINT_ID_INT4:
848 for (x = 0; x < h/2; x++)
849 readfull(s, pb, ast->pkt.data+x*2*w+y*cfs, cfs);
850 break;
851 case DEINT_ID_GENR:
852 for (x = 0; x < w/sps; x++)
853 readfull(s, pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
854 break;
855 case DEINT_ID_SIPR:
856 readfull(s, pb, ast->pkt.data + y * w, w);
857 break;
858 }
859
860 if (++(ast->sub_packet_cnt) < h)
861 return -1;
862 if (ast->deint_id == DEINT_ID_SIPR)
863 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
864
865 ast->sub_packet_cnt = 0;
866 rm->audio_stream_num = st->index;
867 rm->audio_pkt_cnt = h * w / st->codec->block_align;
868 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
869 (ast->deint_id == DEINT_ID_VBRS)) {
870 int x;
871 rm->audio_stream_num = st->index;
872 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
873 if (ast->sub_packet_cnt) {
874 for (x = 0; x < ast->sub_packet_cnt; x++)
875 ast->sub_packet_lengths[x] = avio_rb16(pb);
876 rm->audio_pkt_cnt = ast->sub_packet_cnt;
877 ast->audiotimestamp = timestamp;
878 } else
879 return -1;
880 } else {
881 av_get_packet(pb, pkt, len);
882 rm_ac3_swap_bytes(st, pkt);
883 }
884 } else
885 av_get_packet(pb, pkt, len);
886
887 pkt->stream_index = st->index;
888
889#if 0
890 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
891 if(st->codec->codec_id == AV_CODEC_ID_RV20){
892 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
893 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
894
895 seq |= (timestamp&~0x3FFF);
896 if(seq - timestamp > 0x2000) seq -= 0x4000;
897 if(seq - timestamp < -0x2000) seq += 0x4000;
898 }
899 }
900#endif
901
902 pkt->pts = timestamp;
903 if (flags & 2)
904 pkt->flags |= AV_PKT_FLAG_KEY;
905
906 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
907}
908
909int
910ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
911 AVStream *st, RMStream *ast, AVPacket *pkt)
912{
913 RMDemuxContext *rm = s->priv_data;
914
915 av_assert0 (rm->audio_pkt_cnt > 0);
916
917 if (ast->deint_id == DEINT_ID_VBRF ||
918 ast->deint_id == DEINT_ID_VBRS)
919 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
920 else {
921 if(av_new_packet(pkt, st->codec->block_align) < 0)
922 return AVERROR(ENOMEM);
923 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
924 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
925 st->codec->block_align);
926 }
927 rm->audio_pkt_cnt--;
928 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
929 ast->audiotimestamp = AV_NOPTS_VALUE;
930 pkt->flags = AV_PKT_FLAG_KEY;
931 } else
932 pkt->flags = 0;
933 pkt->stream_index = st->index;
934
935 return rm->audio_pkt_cnt;
936}
937
938static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
939{
940 RMDemuxContext *rm = s->priv_data;
941 AVStream *st = NULL; // init to silence compiler warning
942 int i, len, res, seq = 1;
943 int64_t timestamp, pos;
944 int flags;
945
946 for (;;) {
947 if (rm->audio_pkt_cnt) {
948 // If there are queued audio packet return them first
949 st = s->streams[rm->audio_stream_num];
950 res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
951 if(res < 0)
952 return res;
953 flags = 0;
954 } else {
955 if (rm->old_format) {
956 RMStream *ast;
957
958 st = s->streams[0];
959 ast = st->priv_data;
960 timestamp = AV_NOPTS_VALUE;
961 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
962 ast->coded_framesize * ast->sub_packet_h / 2;
963 flags = (seq++ == 1) ? 2 : 0;
964 pos = avio_tell(s->pb);
965 } else {
966 len=sync(s, &timestamp, &flags, &i, &pos);
967 if (len > 0)
968 st = s->streams[i];
969 }
970
971 if(len<0 || avio_feof(s->pb))
972 return AVERROR(EIO);
973
974 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
975 &seq, flags, timestamp);
976 if (res < -1)
977 return res;
978 if((flags&2) && (seq&0x7F) == 1)
979 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
980 if (res)
981 continue;
982 }
983
984 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
985 || st->discard >= AVDISCARD_ALL){
986 av_free_packet(pkt);
987 } else
988 break;
989 }
990
991 return 0;
992}
993
994static int rm_read_close(AVFormatContext *s)
995{
996 int i;
997
998 for (i=0;i<s->nb_streams;i++)
999 ff_rm_free_rmstream(s->streams[i]->priv_data);
1000
1001 return 0;
1002}
1003
1004static int rm_probe(AVProbeData *p)
1005{
1006 /* check file header */
1007 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
1008 p->buf[2] == 'M' && p->buf[3] == 'F' &&
1009 p->buf[4] == 0 && p->buf[5] == 0) ||
1010 (p->buf[0] == '.' && p->buf[1] == 'r' &&
1011 p->buf[2] == 'a' && p->buf[3] == 0xfd))
1012 return AVPROBE_SCORE_MAX;
1013 else
1014 return 0;
1015}
1016
1017static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
1018 int64_t *ppos, int64_t pos_limit)
1019{
1020 RMDemuxContext *rm = s->priv_data;
1021 int64_t pos, dts;
1022 int stream_index2, flags, len, h;
1023
1024 pos = *ppos;
1025
1026 if(rm->old_format)
1027 return AV_NOPTS_VALUE;
1028
1029 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1030 return AV_NOPTS_VALUE;
1031
1032 rm->remaining_len=0;
1033 for(;;){
1034 int seq=1;
1035 AVStream *st;
1036
1037 len=sync(s, &dts, &flags, &stream_index2, &pos);
1038 if(len<0)
1039 return AV_NOPTS_VALUE;
1040
1041 st = s->streams[stream_index2];
1042 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1043 h= avio_r8(s->pb); len--;
1044 if(!(h & 0x40)){
1045 seq = avio_r8(s->pb); len--;
1046 }
1047 }
1048
1049 if((flags&2) && (seq&0x7F) == 1){
1050 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
1051 flags, stream_index2, stream_index, dts, seq);
1052 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1053 if(stream_index2 == stream_index)
1054 break;
1055 }
1056
1057 avio_skip(s->pb, len);
1058 }
1059 *ppos = pos;
1060 return dts;
1061}
1062
1063static int rm_read_seek(AVFormatContext *s, int stream_index,
1064 int64_t pts, int flags)
1065{
1066 RMDemuxContext *rm = s->priv_data;
1067
1068 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1069 return -1;
1070 rm->audio_pkt_cnt = 0;
1071 return 0;
1072}
1073
1074
1075AVInputFormat ff_rm_demuxer = {
1076 .name = "rm",
1077 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
1078 .priv_data_size = sizeof(RMDemuxContext),
1079 .read_probe = rm_probe,
1080 .read_header = rm_read_header,
1081 .read_packet = rm_read_packet,
1082 .read_close = rm_read_close,
1083 .read_timestamp = rm_read_dts,
1084 .read_seek = rm_read_seek,
1085};
1086
1087AVInputFormat ff_rdt_demuxer = {
1088 .name = "rdt",
1089 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
1090 .priv_data_size = sizeof(RMDemuxContext),
1091 .read_close = rm_read_close,
1092 .flags = AVFMT_NOFILE,
1093};
ffmpeg Piment Noir Debian package repository