2 * "Real" compatible mux and demux.
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #define BUFFER_DURATION 0
26 int packet_total_size;
28 /* codec related output */
31 int nb_frames; /* current frame number */
32 int total_frames; /* total number of frames */
38 StreamInfo streams[2];
39 StreamInfo *audio_stream, *video_stream;
40 int data_pos; /* position of the data after the header */
45 /// Audio descrambling matrix parameters
46 uint8_t *audiobuf; ///< place to store reordered audio data
47 int64_t audiotimestamp; ///< Audio packet timestamp
48 int sub_packet_cnt; // Subpacket counter, used while reading
49 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
50 int audio_stream_num; ///< Stream number for audio packets
51 int audio_pkt_cnt; ///< Output packet counter
52 int audio_framesize; /// Audio frame size from container
53 int sub_packet_lengths[16]; /// Length of each aac subpacket
57 static void put_str(ByteIOContext *s, const char *tag)
59 put_be16(s,strlen(tag));
65 static void put_str8(ByteIOContext *s, const char *tag)
67 put_byte(s, strlen(tag));
73 static void rv10_write_header(AVFormatContext *ctx,
74 int data_size, int index_pos)
76 RMContext *rm = ctx->priv_data;
77 ByteIOContext *s = &ctx->pb;
79 unsigned char *data_offset_ptr, *start_ptr;
80 const char *desc, *mimetype;
81 int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
82 int bit_rate, v, duration, flags, data_pos;
84 start_ptr = s->buf_ptr;
87 put_be32(s,18); /* header size */
90 put_be32(s,4 + ctx->nb_streams); /* num headers */
96 packet_total_size = 0;
100 for(i=0;i<ctx->nb_streams;i++) {
101 StreamInfo *stream = &rm->streams[i];
102 bit_rate += stream->bit_rate;
103 if (stream->packet_max_size > packet_max_size)
104 packet_max_size = stream->packet_max_size;
105 nb_packets += stream->nb_packets;
106 packet_total_size += stream->packet_total_size;
107 /* select maximum duration */
108 v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate);
112 put_be32(s, bit_rate); /* max bit rate */
113 put_be32(s, bit_rate); /* avg bit rate */
114 put_be32(s, packet_max_size); /* max packet size */
116 packet_avg_size = packet_total_size / nb_packets;
119 put_be32(s, packet_avg_size); /* avg packet size */
120 put_be32(s, nb_packets); /* num packets */
121 put_be32(s, duration); /* duration */
122 put_be32(s, BUFFER_DURATION); /* preroll */
123 put_be32(s, index_pos); /* index offset */
124 /* computation of data the data offset */
125 data_offset_ptr = s->buf_ptr;
126 put_be32(s, 0); /* data offset : will be patched after */
127 put_be16(s, ctx->nb_streams); /* num streams */
128 flags = 1 | 2; /* save allowed & perfect play */
129 if (url_is_streamed(s))
130 flags |= 4; /* live broadcast */
136 size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) +
137 strlen(ctx->comment) + 4 * 2 + 10;
140 put_str(s, ctx->title);
141 put_str(s, ctx->author);
142 put_str(s, ctx->copyright);
143 put_str(s, ctx->comment);
145 for(i=0;i<ctx->nb_streams;i++) {
148 stream = &rm->streams[i];
150 if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
151 desc = "The Audio Stream";
152 mimetype = "audio/x-pn-realaudio";
153 codec_data_size = 73;
155 desc = "The Video Stream";
156 mimetype = "video/x-pn-realvideo";
157 codec_data_size = 34;
161 size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
165 put_be16(s, i); /* stream number */
166 put_be32(s, stream->bit_rate); /* max bit rate */
167 put_be32(s, stream->bit_rate); /* avg bit rate */
168 put_be32(s, stream->packet_max_size); /* max packet size */
169 if (stream->nb_packets > 0)
170 packet_avg_size = stream->packet_total_size /
174 put_be32(s, packet_avg_size); /* avg packet size */
175 put_be32(s, 0); /* start time */
176 put_be32(s, BUFFER_DURATION); /* preroll */
178 if (url_is_streamed(s) || !stream->total_frames)
179 put_be32(s, (int)(3600 * 1000));
181 put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
183 put_str8(s, mimetype);
184 put_be32(s, codec_data_size);
186 if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
187 int coded_frame_size, fscode, sample_rate;
188 sample_rate = stream->enc->sample_rate;
189 coded_frame_size = (stream->enc->bit_rate *
190 stream->enc->frame_size) / (8 * sample_rate);
191 /* audio codec info */
194 put_be32(s, 0x00040000); /* version */
196 put_be32(s, 0x01b53530); /* stream length */
197 put_be16(s, 4); /* unknown */
198 put_be32(s, 0x39); /* header size */
200 switch(sample_rate) {
217 put_be16(s, fscode); /* codec additional info, for AC3, seems
218 to be a frequency code */
219 /* special hack to compensate rounding errors... */
220 if (coded_frame_size == 557)
222 put_be32(s, coded_frame_size); /* frame length */
223 put_be32(s, 0x51540); /* unknown */
224 put_be32(s, 0x249f0); /* unknown */
225 put_be32(s, 0x249f0); /* unknown */
227 /* frame length : seems to be very important */
228 put_be16(s, coded_frame_size);
229 put_be32(s, 0); /* unknown */
230 put_be16(s, stream->enc->sample_rate); /* sample rate */
231 put_be32(s, 0x10); /* unknown */
232 put_be16(s, stream->enc->channels);
233 put_str8(s, "Int0"); /* codec name */
234 put_str8(s, "dnet"); /* codec name */
235 put_be16(s, 0); /* title length */
236 put_be16(s, 0); /* author length */
237 put_be16(s, 0); /* copyright length */
238 put_byte(s, 0); /* end of header */
240 /* video codec info */
241 put_be32(s,34); /* size */
242 if(stream->enc->codec_id == CODEC_ID_RV10)
243 put_tag(s,"VIDORV10");
245 put_tag(s,"VIDORV20");
246 put_be16(s, stream->enc->width);
247 put_be16(s, stream->enc->height);
248 put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */
249 put_be32(s,0); /* unknown meaning */
250 put_be16(s, (int) stream->frame_rate); /* unknown meaning */
251 put_be32(s,0); /* unknown meaning */
252 put_be16(s, 8); /* unknown meaning */
253 /* Seems to be the codec version: only use basic H263. The next
254 versions seems to add a diffential DC coding as in
255 MPEG... nothing new under the sun */
256 if(stream->enc->codec_id == CODEC_ID_RV10)
257 put_be32(s,0x10000000);
259 put_be32(s,0x20103001);
260 //put_be32(s,0x10003000);
264 /* patch data offset field */
265 data_pos = s->buf_ptr - start_ptr;
266 rm->data_pos = data_pos;
267 data_offset_ptr[0] = data_pos >> 24;
268 data_offset_ptr[1] = data_pos >> 16;
269 data_offset_ptr[2] = data_pos >> 8;
270 data_offset_ptr[3] = data_pos;
274 put_be32(s,data_size + 10 + 8);
277 put_be32(s, nb_packets); /* number of packets */
278 put_be32(s,0); /* next data header */
281 static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream,
282 int length, int key_frame)
285 ByteIOContext *s = &ctx->pb;
287 stream->nb_packets++;
288 stream->packet_total_size += length;
289 if (length > stream->packet_max_size)
290 stream->packet_max_size = length;
292 put_be16(s,0); /* version */
293 put_be16(s,length + 12);
294 put_be16(s, stream->num); /* stream number */
295 timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate;
296 put_be32(s, timestamp); /* timestamp */
297 put_byte(s, 0); /* reserved */
298 put_byte(s, key_frame ? 2 : 0); /* flags */
301 static int rm_write_header(AVFormatContext *s)
303 RMContext *rm = s->priv_data;
306 AVCodecContext *codec;
308 for(n=0;n<s->nb_streams;n++) {
309 s->streams[n]->id = n;
310 codec = s->streams[n]->codec;
311 stream = &rm->streams[n];
312 memset(stream, 0, sizeof(StreamInfo));
314 stream->bit_rate = codec->bit_rate;
317 switch(codec->codec_type) {
318 case CODEC_TYPE_AUDIO:
319 rm->audio_stream = stream;
320 stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size;
321 /* XXX: dummy values */
322 stream->packet_max_size = 1024;
323 stream->nb_packets = 0;
324 stream->total_frames = stream->nb_packets;
326 case CODEC_TYPE_VIDEO:
327 rm->video_stream = stream;
328 stream->frame_rate = (float)codec->time_base.den / (float)codec->time_base.num;
329 /* XXX: dummy values */
330 stream->packet_max_size = 4096;
331 stream->nb_packets = 0;
332 stream->total_frames = stream->nb_packets;
339 rv10_write_header(s, 0, 0);
340 put_flush_packet(&s->pb);
344 static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags)
347 RMContext *rm = s->priv_data;
348 ByteIOContext *pb = &s->pb;
349 StreamInfo *stream = rm->audio_stream;
352 /* XXX: suppress this malloc */
353 buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) );
355 write_packet_header(s, stream, size, !!(flags & PKT_FLAG_KEY));
357 /* for AC3, the words seems to be reversed */
358 for(i=0;i<size;i+=2) {
362 put_buffer(pb, buf1, size);
363 put_flush_packet(pb);
369 static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags)
371 RMContext *rm = s->priv_data;
372 ByteIOContext *pb = &s->pb;
373 StreamInfo *stream = rm->video_stream;
374 int key_frame = !!(flags & PKT_FLAG_KEY);
376 /* XXX: this is incorrect: should be a parameter */
378 /* Well, I spent some time finding the meaning of these bits. I am
379 not sure I understood everything, but it works !! */
381 write_packet_header(s, stream, size + 7, key_frame);
382 /* bit 7: '1' if final packet of a frame converted in several packets */
384 /* bit 7: '1' if I frame. bits 6..0 : sequence number in current
385 frame starting from 1 */
391 put_be16(pb, 0x4000 + (size)); /* total frame size */
392 put_be16(pb, 0x4000 + (size)); /* offset from the start or the end */
395 write_packet_header(s, size + 6);
397 put_be16(pb, 0x4000 + size); /* total frame size */
398 put_be16(pb, 0x4000 + packet_number * 126); /* position in stream */
400 put_byte(pb, stream->nb_frames & 0xff);
402 put_buffer(pb, buf, size);
403 put_flush_packet(pb);
409 static int rm_write_packet(AVFormatContext *s, AVPacket *pkt)
411 if (s->streams[pkt->stream_index]->codec->codec_type ==
413 return rm_write_audio(s, pkt->data, pkt->size, pkt->flags);
415 return rm_write_video(s, pkt->data, pkt->size, pkt->flags);
418 static int rm_write_trailer(AVFormatContext *s)
420 RMContext *rm = s->priv_data;
421 int data_size, index_pos, i;
422 ByteIOContext *pb = &s->pb;
424 if (!url_is_streamed(&s->pb)) {
425 /* end of file: finish to write header */
426 index_pos = url_fseek(pb, 0, SEEK_CUR);
427 data_size = index_pos - rm->data_pos;
431 put_be32(pb, 10 + 10 * s->nb_streams);
434 for(i=0;i<s->nb_streams;i++) {
435 put_be32(pb, 0); /* zero indices */
436 put_be16(pb, i); /* stream number */
437 put_be32(pb, 0); /* next index */
439 /* undocumented end header */
443 url_fseek(pb, 0, SEEK_SET);
444 for(i=0;i<s->nb_streams;i++)
445 rm->streams[i].total_frames = rm->streams[i].nb_frames;
446 rv10_write_header(s, data_size, index_pos);
448 /* undocumented end header */
452 put_flush_packet(pb);
455 #endif //CONFIG_MUXERS
457 /***************************************************/
459 static void get_str(ByteIOContext *pb, char *buf, int buf_size)
467 if (i < buf_size - 1)
473 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
481 if (i < buf_size - 1)
487 static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
490 RMContext *rm = s->priv_data;
491 ByteIOContext *pb = &s->pb;
497 version = get_be32(pb); /* version */
498 if (((version >> 16) & 0xff) == 3) {
499 int64_t startpos = url_ftell(pb);
500 /* very old version */
501 for(i = 0; i < 14; i++)
503 get_str8(pb, s->title, sizeof(s->title));
504 get_str8(pb, s->author, sizeof(s->author));
505 get_str8(pb, s->copyright, sizeof(s->copyright));
506 get_str8(pb, s->comment, sizeof(s->comment));
507 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
508 // fourcc (should always be "lpcJ")
510 get_str8(pb, buf, sizeof(buf));
512 // Skip extra header crap (this should never happen)
513 if ((startpos + (version & 0xffff)) > url_ftell(pb))
514 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
515 st->codec->sample_rate = 8000;
516 st->codec->channels = 1;
517 st->codec->codec_type = CODEC_TYPE_AUDIO;
518 st->codec->codec_id = CODEC_ID_RA_144;
520 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
521 /* old version (4) */
522 get_be32(pb); /* .ra4 */
523 get_be32(pb); /* data size */
524 get_be16(pb); /* version2 */
525 get_be32(pb); /* header size */
526 flavor= get_be16(pb); /* add codec info / flavor */
527 rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
528 get_be32(pb); /* ??? */
529 get_be32(pb); /* ??? */
530 get_be32(pb); /* ??? */
531 rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
532 st->codec->block_align= get_be16(pb); /* frame size */
533 rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
534 get_be16(pb); /* ??? */
535 if (((version >> 16) & 0xff) == 5) {
536 get_be16(pb); get_be16(pb); get_be16(pb); }
537 st->codec->sample_rate = get_be16(pb);
539 st->codec->channels = get_be16(pb);
540 if (((version >> 16) & 0xff) == 5) {
542 buf[0] = get_byte(pb);
543 buf[1] = get_byte(pb);
544 buf[2] = get_byte(pb);
545 buf[3] = get_byte(pb);
548 get_str8(pb, buf, sizeof(buf)); /* desc */
549 get_str8(pb, buf, sizeof(buf)); /* desc */
551 st->codec->codec_type = CODEC_TYPE_AUDIO;
552 if (!strcmp(buf, "dnet")) {
553 st->codec->codec_id = CODEC_ID_AC3;
554 } else if (!strcmp(buf, "28_8")) {
555 st->codec->codec_id = CODEC_ID_RA_288;
556 st->codec->extradata_size= 0;
557 rm->audio_framesize = st->codec->block_align;
558 st->codec->block_align = coded_framesize;
560 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
561 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
565 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
566 } else if (!strcmp(buf, "cook")) {
567 int codecdata_length, i;
568 get_be16(pb); get_byte(pb);
569 if (((version >> 16) & 0xff) == 5)
571 codecdata_length = get_be32(pb);
572 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
573 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
577 st->codec->codec_id = CODEC_ID_COOK;
578 st->codec->extradata_size= codecdata_length;
579 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
580 for(i = 0; i < codecdata_length; i++)
581 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
582 rm->audio_framesize = st->codec->block_align;
583 st->codec->block_align = rm->sub_packet_size;
585 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
586 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
590 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
591 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
592 int codecdata_length, i;
593 get_be16(pb); get_byte(pb);
594 if (((version >> 16) & 0xff) == 5)
596 st->codec->codec_id = CODEC_ID_AAC;
597 codecdata_length = get_be32(pb);
598 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
599 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
602 if (codecdata_length >= 1) {
603 st->codec->extradata_size = codecdata_length - 1;
604 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
606 for(i = 0; i < st->codec->extradata_size; i++)
607 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
610 st->codec->codec_id = CODEC_ID_NONE;
611 pstrcpy(st->codec->codec_name, sizeof(st->codec->codec_name),
619 get_str8(pb, s->title, sizeof(s->title));
620 get_str8(pb, s->author, sizeof(s->author));
621 get_str8(pb, s->copyright, sizeof(s->copyright));
622 get_str8(pb, s->comment, sizeof(s->comment));
628 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
630 RMContext *rm = s->priv_data;
634 st = av_new_stream(s, 0);
637 return rm_read_audio_stream_info(s, st, 1);
640 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
642 RMContext *rm = s->priv_data;
644 ByteIOContext *pb = &s->pb;
646 int tag_size, size, codec_data_size, i;
648 unsigned int h263_hack_version, start_time, duration;
653 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
654 /* very old .ra format */
655 return rm_read_header_old(s, ap);
656 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
660 get_be32(pb); /* header size */
663 get_be32(pb); /* number of headers */
669 tag_size = get_be32(pb);
672 printf("tag=%c%c%c%c (%08x) size=%d\n",
680 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
683 case MKTAG('P', 'R', 'O', 'P'):
685 get_be32(pb); /* max bit rate */
686 get_be32(pb); /* avg bit rate */
687 get_be32(pb); /* max packet size */
688 get_be32(pb); /* avg packet size */
689 get_be32(pb); /* nb packets */
690 get_be32(pb); /* duration */
691 get_be32(pb); /* preroll */
692 get_be32(pb); /* index offset */
693 get_be32(pb); /* data offset */
694 get_be16(pb); /* nb streams */
695 flags = get_be16(pb); /* flags */
697 case MKTAG('C', 'O', 'N', 'T'):
698 get_str(pb, s->title, sizeof(s->title));
699 get_str(pb, s->author, sizeof(s->author));
700 get_str(pb, s->copyright, sizeof(s->copyright));
701 get_str(pb, s->comment, sizeof(s->comment));
703 case MKTAG('M', 'D', 'P', 'R'):
704 st = av_new_stream(s, 0);
707 st->id = get_be16(pb);
708 get_be32(pb); /* max bit rate */
709 st->codec->bit_rate = get_be32(pb); /* bit rate */
710 get_be32(pb); /* max packet size */
711 get_be32(pb); /* avg packet size */
712 start_time = get_be32(pb); /* start time */
713 get_be32(pb); /* preroll */
714 duration = get_be32(pb); /* duration */
715 st->start_time = start_time;
716 st->duration = duration;
717 get_str8(pb, buf, sizeof(buf)); /* desc */
718 get_str8(pb, buf, sizeof(buf)); /* mimetype */
719 codec_data_size = get_be32(pb);
720 codec_pos = url_ftell(pb);
721 st->codec->codec_type = CODEC_TYPE_DATA;
722 av_set_pts_info(st, 64, 1, 1000);
725 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
727 if (rm_read_audio_stream_info(s, st, 0))
731 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
733 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
736 st->codec->codec_tag = get_le32(pb);
737 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
738 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
739 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
740 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
741 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
743 st->codec->width = get_be16(pb);
744 st->codec->height = get_be16(pb);
745 st->codec->time_base.num= 1;
747 st->codec->codec_type = CODEC_TYPE_VIDEO;
752 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
754 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
755 //check is redundant as get_buffer() will catch this
756 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
759 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
760 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
762 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
763 st->codec->time_base.den = fps * st->codec->time_base.num;
764 /* modification of h263 codec version (!) */
765 #ifdef WORDS_BIGENDIAN
766 h263_hack_version = ((uint32_t*)st->codec->extradata)[1];
768 h263_hack_version = bswap_32(((uint32_t*)st->codec->extradata)[1]);
770 st->codec->sub_id = h263_hack_version;
771 switch((h263_hack_version>>28)){
772 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
773 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
774 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
775 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
780 /* skip codec info */
781 size = url_ftell(pb) - codec_pos;
782 url_fskip(pb, codec_data_size - size);
784 case MKTAG('D', 'A', 'T', 'A'):
787 /* unknown tag: skip it */
788 url_fskip(pb, tag_size - 10);
793 rm->nb_packets = get_be32(pb); /* number of packets */
794 if (!rm->nb_packets && (flags & 4))
795 rm->nb_packets = 3600 * 25;
796 get_be32(pb); /* next data header */
800 for(i=0;i<s->nb_streams;i++) {
801 av_free(s->streams[i]);
806 static int get_num(ByteIOContext *pb, int *len)
817 return (n << 16) | n1;
821 /* multiple of 20 bytes for ra144 (ugly) */
822 #define RAW_PACKET_SIZE 1000
824 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
825 RMContext *rm = s->priv_data;
826 ByteIOContext *pb = &s->pb;
827 int len, num, res, i;
829 uint32_t state=0xFFFFFFFF;
831 while(!url_feof(pb)){
833 if(rm->remaining_len > 0){
834 num= rm->current_stream;
835 len= rm->remaining_len;
836 *timestamp = AV_NOPTS_VALUE;
839 state= (state<<8) + get_byte(pb);
841 if(state == MKBETAG('I', 'N', 'D', 'X')){
842 len = get_be16(pb) - 6;
848 if(state > (unsigned)0xFFFF || state < 12)
854 *timestamp = get_be32(pb);
855 res= get_byte(pb); /* reserved */
856 *flags = get_byte(pb); /* flags */
861 for(i=0;i<s->nb_streams;i++) {
866 if (i == s->nb_streams) {
868 /* skip packet if unknown number */
870 rm->remaining_len -= len;
880 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
882 RMContext *rm = s->priv_data;
883 ByteIOContext *pb = &s->pb;
886 int64_t timestamp, pos;
890 if (rm->audio_pkt_cnt) {
891 // If there are queued audio packet return them first
892 st = s->streams[rm->audio_stream_num];
893 if (st->codec->codec_id == CODEC_ID_AAC)
894 av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
896 av_new_packet(pkt, st->codec->block_align);
897 memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
898 (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
899 st->codec->block_align);
903 pkt->stream_index = rm->audio_stream_num;
904 } else if (rm->old_format) {
906 if (st->codec->codec_id == CODEC_ID_RA_288) {
909 for (y = 0; y < rm->sub_packet_h; y++)
910 for (x = 0; x < rm->sub_packet_h/2; x++)
911 if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
913 rm->audio_stream_num = 0;
914 rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
915 // Release first audio packet
916 av_new_packet(pkt, st->codec->block_align);
917 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
918 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
919 pkt->stream_index = 0;
921 /* just read raw bytes */
922 len = RAW_PACKET_SIZE;
923 len= av_get_packet(pb, pkt, len);
924 pkt->stream_index = 0;
933 len=sync(s, ×tamp, &flags, &i, &pos);
938 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
939 int h, pic_num, len2, pos;
941 h= get_byte(pb); len--;
943 seq = get_byte(pb); len--;
946 if((h & 0xc0) == 0x40){
949 len2 = get_num(pb, &len);
950 pos = get_num(pb, &len);
953 pic_num= get_byte(pb); len--;
954 rm->remaining_len= len;
955 rm->current_stream= st->id;
957 // av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num);
960 rm->remaining_len-= len;
961 av_get_packet(pb, pkt, len);
964 if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
965 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
966 (st->codec->codec_id == CODEC_ID_COOK)) {
968 int sps = rm->sub_packet_size;
969 int cfs = rm->coded_framesize;
970 int h = rm->sub_packet_h;
971 int y = rm->sub_packet_cnt;
972 int w = rm->audio_framesize;
975 y = rm->sub_packet_cnt = 0;
977 rm->audiotimestamp = timestamp;
979 switch(st->codec->codec_id) {
980 case CODEC_ID_RA_288:
981 for (x = 0; x < h/2; x++)
982 get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
985 for (x = 0; x < w/sps; x++)
986 get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
990 if (++(rm->sub_packet_cnt) < h)
993 rm->sub_packet_cnt = 0;
994 rm->audio_stream_num = i;
995 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
996 // Release first audio packet
997 av_new_packet(pkt, st->codec->block_align);
998 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
999 timestamp = rm->audiotimestamp;
1000 flags = 2; // Mark first packet as keyframe
1002 } else if (st->codec->codec_id == CODEC_ID_AAC) {
1004 rm->audio_stream_num = i;
1005 rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
1006 if (rm->sub_packet_cnt) {
1007 for (x = 0; x < rm->sub_packet_cnt; x++)
1008 rm->sub_packet_lengths[x] = get_be16(pb);
1009 // Release first audio packet
1010 rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
1011 av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
1012 flags = 2; // Mark first packet as keyframe
1015 av_get_packet(pb, pkt, len);
1018 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
1019 || st->discard >= AVDISCARD_ALL){
1020 av_free_packet(pkt);
1024 pkt->stream_index = i;
1027 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1028 if(st->codec->codec_id == CODEC_ID_RV20){
1029 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
1030 av_log(NULL, AV_LOG_DEBUG, "%d %Ld %d\n", timestamp, timestamp*512LL/25, seq);
1032 seq |= (timestamp&~0x3FFF);
1033 if(seq - timestamp > 0x2000) seq -= 0x4000;
1034 if(seq - timestamp < -0x2000) seq += 0x4000;
1038 pkt->pts= timestamp;
1040 pkt->flags |= PKT_FLAG_KEY;
1042 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
1046 /* for AC3, needs to swap bytes */
1047 if (st->codec->codec_id == CODEC_ID_AC3) {
1049 for(j=0;j<len;j+=2) {
1059 static int rm_read_close(AVFormatContext *s)
1061 RMContext *rm = s->priv_data;
1063 av_free(rm->audiobuf);
1067 static int rm_probe(AVProbeData *p)
1069 /* check file header */
1070 if (p->buf_size <= 32)
1072 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
1073 p->buf[2] == 'M' && p->buf[3] == 'F' &&
1074 p->buf[4] == 0 && p->buf[5] == 0) ||
1075 (p->buf[0] == '.' && p->buf[1] == 'r' &&
1076 p->buf[2] == 'a' && p->buf[3] == 0xfd))
1077 return AVPROBE_SCORE_MAX;
1082 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
1083 int64_t *ppos, int64_t pos_limit)
1085 RMContext *rm = s->priv_data;
1087 int stream_index2, flags, len, h;
1092 return AV_NOPTS_VALUE;
1094 url_fseek(&s->pb, pos, SEEK_SET);
1095 rm->remaining_len=0;
1100 len=sync(s, &dts, &flags, &stream_index2, &pos);
1102 return AV_NOPTS_VALUE;
1104 st = s->streams[stream_index2];
1105 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1106 h= get_byte(&s->pb); len--;
1108 seq = get_byte(&s->pb); len--;
1112 if((flags&2) && (seq&0x7F) == 1){
1113 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %Ld %d\n", flags, stream_index2, stream_index, dts, seq);
1114 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1115 if(stream_index2 == stream_index)
1119 url_fskip(&s->pb, len);
1125 static AVInputFormat rm_demuxer = {
1137 #ifdef CONFIG_MUXERS
1138 static AVOutputFormat rm_muxer = {
1141 "application/vnd.rn-realmedia",
1150 #endif //CONFIG_MUXERS
1154 av_register_input_format(&rm_demuxer);
1155 #ifdef CONFIG_MUXERS
1156 av_register_output_format(&rm_muxer);
1157 #endif //CONFIG_MUXERS