2 * "Real" compatible demuxer.
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
5 * This file is part of FFmpeg.
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.
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.
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
25 static void get_str(ByteIOContext *pb, char *buf, int buf_size)
39 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
53 static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
56 RMContext *rm = s->priv_data;
57 ByteIOContext *pb = &s->pb;
63 version = get_be32(pb); /* version */
64 if (((version >> 16) & 0xff) == 3) {
65 int64_t startpos = url_ftell(pb);
66 /* very old version */
67 for(i = 0; i < 14; i++)
69 get_str8(pb, s->title, sizeof(s->title));
70 get_str8(pb, s->author, sizeof(s->author));
71 get_str8(pb, s->copyright, sizeof(s->copyright));
72 get_str8(pb, s->comment, sizeof(s->comment));
73 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
74 // fourcc (should always be "lpcJ")
76 get_str8(pb, buf, sizeof(buf));
78 // Skip extra header crap (this should never happen)
79 if ((startpos + (version & 0xffff)) > url_ftell(pb))
80 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
81 st->codec->sample_rate = 8000;
82 st->codec->channels = 1;
83 st->codec->codec_type = CODEC_TYPE_AUDIO;
84 st->codec->codec_id = CODEC_ID_RA_144;
86 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
88 get_be32(pb); /* .ra4 */
89 get_be32(pb); /* data size */
90 get_be16(pb); /* version2 */
91 get_be32(pb); /* header size */
92 flavor= get_be16(pb); /* add codec info / flavor */
93 rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
94 get_be32(pb); /* ??? */
95 get_be32(pb); /* ??? */
96 get_be32(pb); /* ??? */
97 rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
98 st->codec->block_align= get_be16(pb); /* frame size */
99 rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
100 get_be16(pb); /* ??? */
101 if (((version >> 16) & 0xff) == 5) {
102 get_be16(pb); get_be16(pb); get_be16(pb); }
103 st->codec->sample_rate = get_be16(pb);
105 st->codec->channels = get_be16(pb);
106 if (((version >> 16) & 0xff) == 5) {
108 buf[0] = get_byte(pb);
109 buf[1] = get_byte(pb);
110 buf[2] = get_byte(pb);
111 buf[3] = get_byte(pb);
114 get_str8(pb, buf, sizeof(buf)); /* desc */
115 get_str8(pb, buf, sizeof(buf)); /* desc */
117 st->codec->codec_type = CODEC_TYPE_AUDIO;
118 if (!strcmp(buf, "dnet")) {
119 st->codec->codec_id = CODEC_ID_AC3;
120 } else if (!strcmp(buf, "28_8")) {
121 st->codec->codec_id = CODEC_ID_RA_288;
122 st->codec->extradata_size= 0;
123 rm->audio_framesize = st->codec->block_align;
124 st->codec->block_align = coded_framesize;
126 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
127 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
131 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
132 } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
133 int codecdata_length, i;
134 get_be16(pb); get_byte(pb);
135 if (((version >> 16) & 0xff) == 5)
137 codecdata_length = get_be32(pb);
138 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
139 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
143 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
144 else st->codec->codec_id = CODEC_ID_ATRAC3;
145 st->codec->extradata_size= codecdata_length;
146 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
147 for(i = 0; i < codecdata_length; i++)
148 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
149 rm->audio_framesize = st->codec->block_align;
150 st->codec->block_align = rm->sub_packet_size;
152 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
153 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
157 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
158 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
159 int codecdata_length, i;
160 get_be16(pb); get_byte(pb);
161 if (((version >> 16) & 0xff) == 5)
163 st->codec->codec_id = CODEC_ID_AAC;
164 codecdata_length = get_be32(pb);
165 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
166 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
169 if (codecdata_length >= 1) {
170 st->codec->extradata_size = codecdata_length - 1;
171 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
173 for(i = 0; i < st->codec->extradata_size; i++)
174 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
177 st->codec->codec_id = CODEC_ID_NONE;
178 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
185 get_str8(pb, s->title, sizeof(s->title));
186 get_str8(pb, s->author, sizeof(s->author));
187 get_str8(pb, s->copyright, sizeof(s->copyright));
188 get_str8(pb, s->comment, sizeof(s->comment));
194 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
196 RMContext *rm = s->priv_data;
200 st = av_new_stream(s, 0);
203 return rm_read_audio_stream_info(s, st, 1);
206 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
208 RMContext *rm = s->priv_data;
210 ByteIOContext *pb = &s->pb;
212 int tag_size, size, codec_data_size, i;
214 unsigned int start_time, duration;
219 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
220 /* very old .ra format */
221 return rm_read_header_old(s, ap);
222 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
226 get_be32(pb); /* header size */
229 get_be32(pb); /* number of headers */
235 tag_size = get_be32(pb);
238 printf("tag=%c%c%c%c (%08x) size=%d\n",
246 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
249 case MKTAG('P', 'R', 'O', 'P'):
251 get_be32(pb); /* max bit rate */
252 get_be32(pb); /* avg bit rate */
253 get_be32(pb); /* max packet size */
254 get_be32(pb); /* avg packet size */
255 get_be32(pb); /* nb packets */
256 get_be32(pb); /* duration */
257 get_be32(pb); /* preroll */
258 get_be32(pb); /* index offset */
259 get_be32(pb); /* data offset */
260 get_be16(pb); /* nb streams */
261 flags = get_be16(pb); /* flags */
263 case MKTAG('C', 'O', 'N', 'T'):
264 get_str(pb, s->title, sizeof(s->title));
265 get_str(pb, s->author, sizeof(s->author));
266 get_str(pb, s->copyright, sizeof(s->copyright));
267 get_str(pb, s->comment, sizeof(s->comment));
269 case MKTAG('M', 'D', 'P', 'R'):
270 st = av_new_stream(s, 0);
273 st->id = get_be16(pb);
274 get_be32(pb); /* max bit rate */
275 st->codec->bit_rate = get_be32(pb); /* bit rate */
276 get_be32(pb); /* max packet size */
277 get_be32(pb); /* avg packet size */
278 start_time = get_be32(pb); /* start time */
279 get_be32(pb); /* preroll */
280 duration = get_be32(pb); /* duration */
281 st->start_time = start_time;
282 st->duration = duration;
283 get_str8(pb, buf, sizeof(buf)); /* desc */
284 get_str8(pb, buf, sizeof(buf)); /* mimetype */
285 codec_data_size = get_be32(pb);
286 codec_pos = url_ftell(pb);
287 st->codec->codec_type = CODEC_TYPE_DATA;
288 av_set_pts_info(st, 64, 1, 1000);
291 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
293 if (rm_read_audio_stream_info(s, st, 0))
297 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
299 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
302 st->codec->codec_tag = get_le32(pb);
303 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
304 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
305 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
306 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
307 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
309 st->codec->width = get_be16(pb);
310 st->codec->height = get_be16(pb);
311 st->codec->time_base.num= 1;
313 st->codec->codec_type = CODEC_TYPE_VIDEO;
318 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
320 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
321 //check is redundant as get_buffer() will catch this
322 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
325 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
326 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
328 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
329 st->codec->time_base.den = fps * st->codec->time_base.num;
330 switch(((uint8_t*)st->codec->extradata)[4]>>4){
331 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
332 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
333 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
334 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
339 /* skip codec info */
340 size = url_ftell(pb) - codec_pos;
341 url_fskip(pb, codec_data_size - size);
343 case MKTAG('D', 'A', 'T', 'A'):
346 /* unknown tag: skip it */
347 url_fskip(pb, tag_size - 10);
352 rm->nb_packets = get_be32(pb); /* number of packets */
353 if (!rm->nb_packets && (flags & 4))
354 rm->nb_packets = 3600 * 25;
355 get_be32(pb); /* next data header */
359 for(i=0;i<s->nb_streams;i++) {
360 av_free(s->streams[i]);
365 static int get_num(ByteIOContext *pb, int *len)
376 return (n << 16) | n1;
380 /* multiple of 20 bytes for ra144 (ugly) */
381 #define RAW_PACKET_SIZE 1000
383 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
384 RMContext *rm = s->priv_data;
385 ByteIOContext *pb = &s->pb;
386 int len, num, res, i;
388 uint32_t state=0xFFFFFFFF;
390 while(!url_feof(pb)){
392 if(rm->remaining_len > 0){
393 num= rm->current_stream;
394 len= rm->remaining_len;
395 *timestamp = AV_NOPTS_VALUE;
398 state= (state<<8) + get_byte(pb);
400 if(state == MKBETAG('I', 'N', 'D', 'X')){
401 len = get_be16(pb) - 6;
407 if(state > (unsigned)0xFFFF || state < 12)
413 *timestamp = get_be32(pb);
414 res= get_byte(pb); /* reserved */
415 *flags = get_byte(pb); /* flags */
420 for(i=0;i<s->nb_streams;i++) {
425 if (i == s->nb_streams) {
427 /* skip packet if unknown number */
429 rm->remaining_len -= len;
439 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
441 RMContext *rm = s->priv_data;
442 ByteIOContext *pb = &s->pb;
445 int64_t timestamp, pos;
449 if (rm->audio_pkt_cnt) {
450 // If there are queued audio packet return them first
451 st = s->streams[rm->audio_stream_num];
452 if (st->codec->codec_id == CODEC_ID_AAC)
453 av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
455 av_new_packet(pkt, st->codec->block_align);
456 memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
457 (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
458 st->codec->block_align);
462 pkt->stream_index = rm->audio_stream_num;
463 } else if (rm->old_format) {
465 if (st->codec->codec_id == CODEC_ID_RA_288) {
468 for (y = 0; y < rm->sub_packet_h; y++)
469 for (x = 0; x < rm->sub_packet_h/2; x++)
470 if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
472 rm->audio_stream_num = 0;
473 rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
474 // Release first audio packet
475 av_new_packet(pkt, st->codec->block_align);
476 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
477 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
478 pkt->stream_index = 0;
480 /* just read raw bytes */
481 len = RAW_PACKET_SIZE;
482 len= av_get_packet(pb, pkt, len);
483 pkt->stream_index = 0;
492 len=sync(s, ×tamp, &flags, &i, &pos);
497 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
498 int h, pic_num, len2, pos;
500 h= get_byte(pb); len--;
502 seq = get_byte(pb); len--;
505 if((h & 0xc0) == 0x40){
508 len2 = get_num(pb, &len);
509 pos = get_num(pb, &len);
512 pic_num= get_byte(pb); len--;
513 rm->remaining_len= len;
514 rm->current_stream= st->id;
516 // av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num);
519 rm->remaining_len-= len;
520 av_get_packet(pb, pkt, len);
522 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
523 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
524 (st->codec->codec_id == CODEC_ID_COOK) ||
525 (st->codec->codec_id == CODEC_ID_ATRAC3)) {
527 int sps = rm->sub_packet_size;
528 int cfs = rm->coded_framesize;
529 int h = rm->sub_packet_h;
530 int y = rm->sub_packet_cnt;
531 int w = rm->audio_framesize;
534 y = rm->sub_packet_cnt = 0;
536 rm->audiotimestamp = timestamp;
538 switch(st->codec->codec_id) {
539 case CODEC_ID_RA_288:
540 for (x = 0; x < h/2; x++)
541 get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
543 case CODEC_ID_ATRAC3:
545 for (x = 0; x < w/sps; x++)
546 get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
550 if (++(rm->sub_packet_cnt) < h)
553 rm->sub_packet_cnt = 0;
554 rm->audio_stream_num = i;
555 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
556 // Release first audio packet
557 av_new_packet(pkt, st->codec->block_align);
558 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
559 timestamp = rm->audiotimestamp;
560 flags = 2; // Mark first packet as keyframe
562 } else if (st->codec->codec_id == CODEC_ID_AAC) {
564 rm->audio_stream_num = i;
565 rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
566 if (rm->sub_packet_cnt) {
567 for (x = 0; x < rm->sub_packet_cnt; x++)
568 rm->sub_packet_lengths[x] = get_be16(pb);
569 // Release first audio packet
570 rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
571 av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
572 flags = 2; // Mark first packet as keyframe
575 av_get_packet(pb, pkt, len);
578 av_get_packet(pb, pkt, len);
580 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
581 || st->discard >= AVDISCARD_ALL){
586 pkt->stream_index = i;
589 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
590 if(st->codec->codec_id == CODEC_ID_RV20){
591 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
592 av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", timestamp, timestamp*512LL/25, seq);
594 seq |= (timestamp&~0x3FFF);
595 if(seq - timestamp > 0x2000) seq -= 0x4000;
596 if(seq - timestamp < -0x2000) seq += 0x4000;
602 pkt->flags |= PKT_FLAG_KEY;
604 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
608 /* for AC3, needs to swap bytes */
609 if (st->codec->codec_id == CODEC_ID_AC3) {
611 for(j=0;j<len;j+=2) {
612 FFSWAP(int, ptr[0], ptr[1]);
619 static int rm_read_close(AVFormatContext *s)
621 RMContext *rm = s->priv_data;
623 av_free(rm->audiobuf);
627 static int rm_probe(AVProbeData *p)
629 /* check file header */
630 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
631 p->buf[2] == 'M' && p->buf[3] == 'F' &&
632 p->buf[4] == 0 && p->buf[5] == 0) ||
633 (p->buf[0] == '.' && p->buf[1] == 'r' &&
634 p->buf[2] == 'a' && p->buf[3] == 0xfd))
635 return AVPROBE_SCORE_MAX;
640 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
641 int64_t *ppos, int64_t pos_limit)
643 RMContext *rm = s->priv_data;
645 int stream_index2, flags, len, h;
650 return AV_NOPTS_VALUE;
652 url_fseek(&s->pb, pos, SEEK_SET);
658 len=sync(s, &dts, &flags, &stream_index2, &pos);
660 return AV_NOPTS_VALUE;
662 st = s->streams[stream_index2];
663 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
664 h= get_byte(&s->pb); len--;
666 seq = get_byte(&s->pb); len--;
670 if((flags&2) && (seq&0x7F) == 1){
671 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
672 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
673 if(stream_index2 == stream_index)
677 url_fskip(&s->pb, len);
683 AVInputFormat rm_demuxer = {