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 inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
36 if (buf_size > 0) *q = '\0';
39 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
41 get_strl(pb, buf, buf_size, get_be16(pb));
44 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
46 get_strl(pb, buf, buf_size, get_byte(pb));
49 static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
52 RMContext *rm = s->priv_data;
53 ByteIOContext *pb = &s->pb;
59 version = get_be32(pb); /* version */
60 if (((version >> 16) & 0xff) == 3) {
61 int64_t startpos = url_ftell(pb);
62 /* very old version */
63 for(i = 0; i < 14; i++)
65 get_str8(pb, s->title, sizeof(s->title));
66 get_str8(pb, s->author, sizeof(s->author));
67 get_str8(pb, s->copyright, sizeof(s->copyright));
68 get_str8(pb, s->comment, sizeof(s->comment));
69 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
70 // fourcc (should always be "lpcJ")
72 get_str8(pb, buf, sizeof(buf));
74 // Skip extra header crap (this should never happen)
75 if ((startpos + (version & 0xffff)) > url_ftell(pb))
76 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
77 st->codec->sample_rate = 8000;
78 st->codec->channels = 1;
79 st->codec->codec_type = CODEC_TYPE_AUDIO;
80 st->codec->codec_id = CODEC_ID_RA_144;
82 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
84 get_be32(pb); /* .ra4 */
85 get_be32(pb); /* data size */
86 get_be16(pb); /* version2 */
87 get_be32(pb); /* header size */
88 flavor= get_be16(pb); /* add codec info / flavor */
89 rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
90 get_be32(pb); /* ??? */
91 get_be32(pb); /* ??? */
92 get_be32(pb); /* ??? */
93 rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
94 st->codec->block_align= get_be16(pb); /* frame size */
95 rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
96 get_be16(pb); /* ??? */
97 if (((version >> 16) & 0xff) == 5) {
98 get_be16(pb); get_be16(pb); get_be16(pb); }
99 st->codec->sample_rate = get_be16(pb);
101 st->codec->channels = get_be16(pb);
102 if (((version >> 16) & 0xff) == 5) {
104 buf[0] = get_byte(pb);
105 buf[1] = get_byte(pb);
106 buf[2] = get_byte(pb);
107 buf[3] = get_byte(pb);
110 get_str8(pb, buf, sizeof(buf)); /* desc */
111 get_str8(pb, buf, sizeof(buf)); /* desc */
113 st->codec->codec_type = CODEC_TYPE_AUDIO;
114 if (!strcmp(buf, "dnet")) {
115 st->codec->codec_id = CODEC_ID_AC3;
116 st->need_parsing = AVSTREAM_PARSE_FULL;
117 } else if (!strcmp(buf, "28_8")) {
118 st->codec->codec_id = CODEC_ID_RA_288;
119 st->codec->extradata_size= 0;
120 rm->audio_framesize = st->codec->block_align;
121 st->codec->block_align = coded_framesize;
123 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
124 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
128 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
129 } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
130 int codecdata_length, i;
131 get_be16(pb); get_byte(pb);
132 if (((version >> 16) & 0xff) == 5)
134 codecdata_length = get_be32(pb);
135 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
136 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
140 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
141 else st->codec->codec_id = CODEC_ID_ATRAC3;
142 st->codec->extradata_size= codecdata_length;
143 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
144 for(i = 0; i < codecdata_length; i++)
145 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
146 rm->audio_framesize = st->codec->block_align;
147 st->codec->block_align = rm->sub_packet_size;
149 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
150 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
154 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
155 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
156 int codecdata_length, i;
157 get_be16(pb); get_byte(pb);
158 if (((version >> 16) & 0xff) == 5)
160 st->codec->codec_id = CODEC_ID_AAC;
161 codecdata_length = get_be32(pb);
162 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
163 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
166 if (codecdata_length >= 1) {
167 st->codec->extradata_size = codecdata_length - 1;
168 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
170 for(i = 0; i < st->codec->extradata_size; i++)
171 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
174 st->codec->codec_id = CODEC_ID_NONE;
175 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
182 get_str8(pb, s->title, sizeof(s->title));
183 get_str8(pb, s->author, sizeof(s->author));
184 get_str8(pb, s->copyright, sizeof(s->copyright));
185 get_str8(pb, s->comment, sizeof(s->comment));
191 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
193 RMContext *rm = s->priv_data;
197 st = av_new_stream(s, 0);
200 return rm_read_audio_stream_info(s, st, 1);
203 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
205 RMContext *rm = s->priv_data;
207 ByteIOContext *pb = &s->pb;
209 int tag_size, size, codec_data_size, i;
211 unsigned int start_time, duration;
216 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
217 /* very old .ra format */
218 return rm_read_header_old(s, ap);
219 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
223 get_be32(pb); /* header size */
226 get_be32(pb); /* number of headers */
232 tag_size = get_be32(pb);
235 printf("tag=%c%c%c%c (%08x) size=%d\n",
243 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
246 case MKTAG('P', 'R', 'O', 'P'):
248 get_be32(pb); /* max bit rate */
249 get_be32(pb); /* avg bit rate */
250 get_be32(pb); /* max packet size */
251 get_be32(pb); /* avg packet size */
252 get_be32(pb); /* nb packets */
253 get_be32(pb); /* duration */
254 get_be32(pb); /* preroll */
255 get_be32(pb); /* index offset */
256 get_be32(pb); /* data offset */
257 get_be16(pb); /* nb streams */
258 flags = get_be16(pb); /* flags */
260 case MKTAG('C', 'O', 'N', 'T'):
261 get_str16(pb, s->title, sizeof(s->title));
262 get_str16(pb, s->author, sizeof(s->author));
263 get_str16(pb, s->copyright, sizeof(s->copyright));
264 get_str16(pb, s->comment, sizeof(s->comment));
266 case MKTAG('M', 'D', 'P', 'R'):
267 st = av_new_stream(s, 0);
270 st->id = get_be16(pb);
271 get_be32(pb); /* max bit rate */
272 st->codec->bit_rate = get_be32(pb); /* bit rate */
273 get_be32(pb); /* max packet size */
274 get_be32(pb); /* avg packet size */
275 start_time = get_be32(pb); /* start time */
276 get_be32(pb); /* preroll */
277 duration = get_be32(pb); /* duration */
278 st->start_time = start_time;
279 st->duration = duration;
280 get_str8(pb, buf, sizeof(buf)); /* desc */
281 get_str8(pb, buf, sizeof(buf)); /* mimetype */
282 codec_data_size = get_be32(pb);
283 codec_pos = url_ftell(pb);
284 st->codec->codec_type = CODEC_TYPE_DATA;
285 av_set_pts_info(st, 64, 1, 1000);
288 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
290 if (rm_read_audio_stream_info(s, st, 0))
294 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
296 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
299 st->codec->codec_tag = get_le32(pb);
300 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
301 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
302 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
303 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
304 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
306 st->codec->width = get_be16(pb);
307 st->codec->height = get_be16(pb);
308 st->codec->time_base.num= 1;
310 st->codec->codec_type = CODEC_TYPE_VIDEO;
315 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
317 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
318 //check is redundant as get_buffer() will catch this
319 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
322 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
323 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
325 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
326 st->codec->time_base.den = fps * st->codec->time_base.num;
327 switch(((uint8_t*)st->codec->extradata)[4]>>4){
328 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
329 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
330 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
331 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
336 /* skip codec info */
337 size = url_ftell(pb) - codec_pos;
338 url_fskip(pb, codec_data_size - size);
340 case MKTAG('D', 'A', 'T', 'A'):
343 /* unknown tag: skip it */
344 url_fskip(pb, tag_size - 10);
349 rm->nb_packets = get_be32(pb); /* number of packets */
350 if (!rm->nb_packets && (flags & 4))
351 rm->nb_packets = 3600 * 25;
352 get_be32(pb); /* next data header */
356 for(i=0;i<s->nb_streams;i++) {
357 av_free(s->streams[i]);
362 static int get_num(ByteIOContext *pb, int *len)
373 return (n << 16) | n1;
377 /* multiple of 20 bytes for ra144 (ugly) */
378 #define RAW_PACKET_SIZE 1000
380 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
381 RMContext *rm = s->priv_data;
382 ByteIOContext *pb = &s->pb;
383 int len, num, res, i;
385 uint32_t state=0xFFFFFFFF;
387 while(!url_feof(pb)){
389 if(rm->remaining_len > 0){
390 num= rm->current_stream;
391 len= rm->remaining_len;
392 *timestamp = AV_NOPTS_VALUE;
395 state= (state<<8) + get_byte(pb);
397 if(state == MKBETAG('I', 'N', 'D', 'X')){
398 len = get_be16(pb) - 6;
404 if(state > (unsigned)0xFFFF || state < 12)
410 *timestamp = get_be32(pb);
411 res= get_byte(pb); /* reserved */
412 *flags = get_byte(pb); /* flags */
417 for(i=0;i<s->nb_streams;i++) {
422 if (i == s->nb_streams) {
424 /* skip packet if unknown number */
426 rm->remaining_len -= len;
436 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
438 RMContext *rm = s->priv_data;
439 ByteIOContext *pb = &s->pb;
442 int64_t timestamp, pos;
446 if (rm->audio_pkt_cnt) {
447 // If there are queued audio packet return them first
448 st = s->streams[rm->audio_stream_num];
449 if (st->codec->codec_id == CODEC_ID_AAC)
450 av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
452 av_new_packet(pkt, st->codec->block_align);
453 memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
454 (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
455 st->codec->block_align);
459 pkt->stream_index = rm->audio_stream_num;
460 } else if (rm->old_format) {
462 if (st->codec->codec_id == CODEC_ID_RA_288) {
465 for (y = 0; y < rm->sub_packet_h; y++)
466 for (x = 0; x < rm->sub_packet_h/2; x++)
467 if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
469 rm->audio_stream_num = 0;
470 rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
471 // Release first audio packet
472 av_new_packet(pkt, st->codec->block_align);
473 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
474 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
475 pkt->stream_index = 0;
477 /* just read raw bytes */
478 len = RAW_PACKET_SIZE;
479 len= av_get_packet(pb, pkt, len);
480 pkt->stream_index = 0;
489 len=sync(s, ×tamp, &flags, &i, &pos);
494 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
495 int h, pic_num, len2, pos;
497 h= get_byte(pb); len--;
499 seq = get_byte(pb); len--;
502 if((h & 0xc0) == 0x40){
505 len2 = get_num(pb, &len);
506 pos = get_num(pb, &len);
509 pic_num= get_byte(pb); len--;
510 rm->remaining_len= len;
511 rm->current_stream= st->id;
513 // av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num);
514 if((h & 0xc0) == 0x80)
518 rm->remaining_len-= len;
519 av_get_packet(pb, pkt, len);
521 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
522 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
523 (st->codec->codec_id == CODEC_ID_COOK) ||
524 (st->codec->codec_id == CODEC_ID_ATRAC3)) {
526 int sps = rm->sub_packet_size;
527 int cfs = rm->coded_framesize;
528 int h = rm->sub_packet_h;
529 int y = rm->sub_packet_cnt;
530 int w = rm->audio_framesize;
533 y = rm->sub_packet_cnt = 0;
535 rm->audiotimestamp = timestamp;
537 switch(st->codec->codec_id) {
538 case CODEC_ID_RA_288:
539 for (x = 0; x < h/2; x++)
540 get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
542 case CODEC_ID_ATRAC3:
544 for (x = 0; x < w/sps; x++)
545 get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
549 if (++(rm->sub_packet_cnt) < h)
552 rm->sub_packet_cnt = 0;
553 rm->audio_stream_num = i;
554 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
555 // Release first audio packet
556 av_new_packet(pkt, st->codec->block_align);
557 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
558 timestamp = rm->audiotimestamp;
559 flags = 2; // Mark first packet as keyframe
561 } else if (st->codec->codec_id == CODEC_ID_AAC) {
563 rm->audio_stream_num = i;
564 rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
565 if (rm->sub_packet_cnt) {
566 for (x = 0; x < rm->sub_packet_cnt; x++)
567 rm->sub_packet_lengths[x] = get_be16(pb);
568 // Release first audio packet
569 rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
570 av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
571 flags = 2; // Mark first packet as keyframe
574 av_get_packet(pb, pkt, len);
577 av_get_packet(pb, pkt, len);
579 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
580 || st->discard >= AVDISCARD_ALL){
585 pkt->stream_index = i;
588 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
589 if(st->codec->codec_id == CODEC_ID_RV20){
590 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
591 av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", timestamp, timestamp*512LL/25, seq);
593 seq |= (timestamp&~0x3FFF);
594 if(seq - timestamp > 0x2000) seq -= 0x4000;
595 if(seq - timestamp < -0x2000) seq += 0x4000;
601 pkt->flags |= PKT_FLAG_KEY;
603 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
607 /* for AC3, needs to swap bytes */
608 if (st->codec->codec_id == CODEC_ID_AC3) {
610 for(j=0;j<pkt->size;j+=2) {
611 FFSWAP(int, ptr[0], ptr[1]);
618 static int rm_read_close(AVFormatContext *s)
620 RMContext *rm = s->priv_data;
622 av_free(rm->audiobuf);
626 static int rm_probe(AVProbeData *p)
628 /* check file header */
629 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
630 p->buf[2] == 'M' && p->buf[3] == 'F' &&
631 p->buf[4] == 0 && p->buf[5] == 0) ||
632 (p->buf[0] == '.' && p->buf[1] == 'r' &&
633 p->buf[2] == 'a' && p->buf[3] == 0xfd))
634 return AVPROBE_SCORE_MAX;
639 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
640 int64_t *ppos, int64_t pos_limit)
642 RMContext *rm = s->priv_data;
644 int stream_index2, flags, len, h;
649 return AV_NOPTS_VALUE;
651 url_fseek(&s->pb, pos, SEEK_SET);
657 len=sync(s, &dts, &flags, &stream_index2, &pos);
659 return AV_NOPTS_VALUE;
661 st = s->streams[stream_index2];
662 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
663 h= get_byte(&s->pb); len--;
665 seq = get_byte(&s->pb); len--;
669 if((flags&2) && (seq&0x7F) == 1){
670 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
671 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
672 if(stream_index2 == stream_index)
676 url_fskip(&s->pb, len);
682 AVInputFormat rm_demuxer = {