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