2 * "Real" compatible demuxer.
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avstring.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/dict.h"
29 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac
30 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
31 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
32 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
33 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
34 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
37 AVPacket pkt; ///< place to store merged video frame / reordered audio data
38 int videobufsize; ///< current assembled frame size
39 int videobufpos; ///< position for the next slice in the video buffer
40 int curpic_num; ///< picture number of current frame
41 int cur_slice, slices;
42 int64_t pktpos; ///< first slice position in file
43 /// Audio descrambling matrix parameters
44 int64_t audiotimestamp; ///< Audio packet timestamp
45 int sub_packet_cnt; // Subpacket counter, used while reading
46 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
47 int audio_framesize; /// Audio frame size from container
48 int sub_packet_lengths[16]; /// Length of each subpacket
49 int32_t deint_id; ///< deinterleaver used in audio stream
57 int audio_stream_num; ///< Stream number for audio packets
58 int audio_pkt_cnt; ///< Output packet counter
61 static const unsigned char sipr_swaps[38][2] = {
62 { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
63 { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
64 { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
65 { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
66 { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
67 { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
68 { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
69 { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
70 { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
71 { 67, 83 }, { 77, 80 }
74 const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
76 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
87 if (buf_size > 0) *q = '\0';
90 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
92 get_strl(pb, buf, buf_size, avio_r8(pb));
95 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
99 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
100 if (!avctx->extradata)
101 return AVERROR(ENOMEM);
102 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
103 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
104 if (avctx->extradata_size != size)
109 static void rm_read_metadata(AVFormatContext *s, int wide)
113 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
114 int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb);
115 get_strl(s->pb, buf, sizeof(buf), len);
116 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
120 RMStream *ff_rm_alloc_rmstream (void)
122 RMStream *rms = av_mallocz(sizeof(RMStream));
123 rms->curpic_num = -1;
127 void ff_rm_free_rmstream (RMStream *rms)
129 av_free_packet(&rms->pkt);
132 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
133 AVStream *st, RMStream *ast, int read_all)
140 version = avio_rb16(pb); /* version */
142 int header_size = avio_rb16(pb);
143 int64_t startpos = avio_tell(pb);
145 rm_read_metadata(s, 0);
146 if ((startpos + header_size) >= avio_tell(pb) + 2) {
147 // fourcc (should always be "lpcJ")
149 get_str8(pb, buf, sizeof(buf));
151 // Skip extra header crap (this should never happen)
152 if ((startpos + header_size) > avio_tell(pb))
153 avio_skip(pb, header_size + startpos - avio_tell(pb));
154 st->codec->sample_rate = 8000;
155 st->codec->channels = 1;
156 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
157 st->codec->codec_id = CODEC_ID_RA_144;
158 ast->deint_id = DEINT_ID_INT0;
160 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
161 int codecdata_length;
162 /* old version (4) */
163 avio_skip(pb, 2); /* unused */
164 avio_rb32(pb); /* .ra4 */
165 avio_rb32(pb); /* data size */
166 avio_rb16(pb); /* version2 */
167 avio_rb32(pb); /* header size */
168 flavor= avio_rb16(pb); /* add codec info / flavor */
169 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
170 avio_rb32(pb); /* ??? */
171 avio_rb32(pb); /* ??? */
172 avio_rb32(pb); /* ??? */
173 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
174 st->codec->block_align= avio_rb16(pb); /* frame size */
175 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
176 avio_rb16(pb); /* ??? */
178 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
180 st->codec->sample_rate = avio_rb16(pb);
182 st->codec->channels = avio_rb16(pb);
184 ast->deint_id = avio_rl32(pb);
185 avio_read(pb, buf, 4);
188 get_str8(pb, buf, sizeof(buf)); /* desc */
189 ast->deint_id = AV_RL32(buf);
190 get_str8(pb, buf, sizeof(buf)); /* desc */
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);
197 switch (st->codec->codec_id) {
199 st->need_parsing = AVSTREAM_PARSE_FULL;
201 case 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;
207 case CODEC_ID_ATRAC3:
209 avio_rb16(pb); avio_r8(pb);
212 codecdata_length = avio_rb32(pb);
213 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
214 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
218 ast->audio_framesize = st->codec->block_align;
219 if (st->codec->codec_id == CODEC_ID_SIPR) {
221 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
225 st->codec->block_align = ff_sipr_subpk_size[flavor];
227 if(sub_packet_size <= 0){
228 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
231 st->codec->block_align = ast->sub_packet_size;
233 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
237 avio_rb16(pb); avio_r8(pb);
240 codecdata_length = avio_rb32(pb);
241 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
242 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
245 if (codecdata_length >= 1) {
247 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
252 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
254 if (ast->deint_id == DEINT_ID_INT4 ||
255 ast->deint_id == DEINT_ID_GENR ||
256 ast->deint_id == DEINT_ID_SIPR) {
257 if (st->codec->block_align <= 0 ||
258 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
259 ast->audio_framesize * sub_packet_h < st->codec->block_align)
260 return AVERROR_INVALIDDATA;
261 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
262 return AVERROR(ENOMEM);
264 switch (ast->deint_id) {
266 if (ast->coded_framesize > ast->audio_framesize ||
267 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
268 return AVERROR_INVALIDDATA;
271 if (ast->sub_packet_size <= 0 ||
272 ast->sub_packet_size > ast->audio_framesize)
273 return AVERROR_INVALIDDATA;
281 av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
282 return AVERROR_INVALIDDATA;
289 rm_read_metadata(s, 0);
296 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
297 AVStream *st, RMStream *rst, int codec_data_size)
304 av_set_pts_info(st, 64, 1, 1000);
305 codec_pos = avio_tell(pb);
307 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
309 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
313 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
315 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
318 st->codec->codec_tag = avio_rl32(pb);
319 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
320 st->codec->codec_tag);
321 // av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
322 if (st->codec->codec_id == CODEC_ID_NONE)
324 st->codec->width = avio_rb16(pb);
325 st->codec->height = avio_rb16(pb);
326 avio_skip(pb, 2); // looks like bits per sample
327 avio_skip(pb, 4); // always zero?
328 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
329 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
332 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
335 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
336 0x10000, fps, (1 << 30) - 1);
337 st->avg_frame_rate.num = st->codec->time_base.den;
338 st->avg_frame_rate.den = st->codec->time_base.num;
342 /* skip codec info */
343 size = avio_tell(pb) - codec_pos;
344 avio_skip(pb, codec_data_size - size);
349 /** this function assumes that the demuxer has already seeked to the start
350 * of the INDX chunk, and will bail out if not. */
351 static int rm_read_index(AVFormatContext *s)
353 AVIOContext *pb = s->pb;
354 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
358 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
360 size = avio_rb32(pb);
364 n_pkts = avio_rb32(pb);
365 str_id = avio_rb16(pb);
366 next_off = avio_rb32(pb);
367 for (n = 0; n < s->nb_streams; n++)
368 if (s->streams[n]->id == str_id) {
372 if (n == s->nb_streams)
375 for (n = 0; n < n_pkts; n++) {
379 avio_skip(pb, 4); /* packet no. */
381 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
385 if (next_off && avio_tell(pb) != next_off &&
386 avio_seek(pb, next_off, SEEK_SET) < 0)
393 static int rm_read_header_old(AVFormatContext *s)
395 RMDemuxContext *rm = s->priv_data;
399 st = avformat_new_stream(s, NULL);
402 st->priv_data = ff_rm_alloc_rmstream();
403 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
406 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
408 RMDemuxContext *rm = s->priv_data;
410 AVIOContext *pb = s->pb;
413 unsigned int start_time, duration;
414 unsigned int data_off = 0, indx_off = 0;
419 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
420 /* very old .ra format */
421 return rm_read_header_old(s);
422 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
426 avio_rb32(pb); /* header size */
429 avio_rb32(pb); /* number of headers */
435 tag_size = avio_rb32(pb);
437 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
444 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
447 case MKTAG('P', 'R', 'O', 'P'):
449 avio_rb32(pb); /* max bit rate */
450 avio_rb32(pb); /* avg bit rate */
451 avio_rb32(pb); /* max packet size */
452 avio_rb32(pb); /* avg packet size */
453 avio_rb32(pb); /* nb packets */
454 avio_rb32(pb); /* duration */
455 avio_rb32(pb); /* preroll */
456 indx_off = avio_rb32(pb); /* index offset */
457 data_off = avio_rb32(pb); /* data offset */
458 avio_rb16(pb); /* nb streams */
459 flags = avio_rb16(pb); /* flags */
461 case MKTAG('C', 'O', 'N', 'T'):
462 rm_read_metadata(s, 1);
464 case MKTAG('M', 'D', 'P', 'R'):
465 st = avformat_new_stream(s, NULL);
467 return AVERROR(ENOMEM);
468 st->id = avio_rb16(pb);
469 avio_rb32(pb); /* max bit rate */
470 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
471 avio_rb32(pb); /* max packet size */
472 avio_rb32(pb); /* avg packet size */
473 start_time = avio_rb32(pb); /* start time */
474 avio_rb32(pb); /* preroll */
475 duration = avio_rb32(pb); /* duration */
476 st->start_time = start_time;
477 st->duration = duration;
478 get_str8(pb, buf, sizeof(buf)); /* desc */
479 get_str8(pb, buf, sizeof(buf)); /* mimetype */
480 st->codec->codec_type = AVMEDIA_TYPE_DATA;
481 st->priv_data = ff_rm_alloc_rmstream();
482 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
486 case MKTAG('D', 'A', 'T', 'A'):
489 /* unknown tag: skip it */
490 avio_skip(pb, tag_size - 10);
495 rm->nb_packets = avio_rb32(pb); /* number of packets */
496 if (!rm->nb_packets && (flags & 4))
497 rm->nb_packets = 3600 * 25;
498 avio_rb32(pb); /* next data header */
501 data_off = avio_tell(pb) - 18;
502 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
503 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
505 avio_seek(pb, data_off + 18, SEEK_SET);
511 static int get_num(AVIOContext *pb, int *len)
523 return (n << 16) | n1;
527 /* multiple of 20 bytes for ra144 (ugly) */
528 #define RAW_PACKET_SIZE 1000
530 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
531 RMDemuxContext *rm = s->priv_data;
532 AVIOContext *pb = s->pb;
534 uint32_t state=0xFFFFFFFF;
536 while(!pb->eof_reached){
538 *pos= avio_tell(pb) - 3;
539 if(rm->remaining_len > 0){
540 num= rm->current_stream;
541 len= rm->remaining_len;
542 *timestamp = AV_NOPTS_VALUE;
545 state= (state<<8) + avio_r8(pb);
547 if(state == MKBETAG('I', 'N', 'D', 'X')){
548 int n_pkts, expected_len;
551 n_pkts = avio_rb32(pb);
552 expected_len = 20 + n_pkts * 14;
554 /* some files don't add index entries to chunk size... */
556 else if (len != expected_len)
557 av_log(s, AV_LOG_WARNING,
558 "Index size %d (%d pkts) is wrong, should be %d.\n",
559 len, n_pkts, expected_len);
560 len -= 14; // we already read part of the index header
564 } else if (state == MKBETAG('D','A','T','A')) {
565 av_log(s, AV_LOG_WARNING,
566 "DATA tag in middle of chunk, file may be broken.\n");
569 if(state > (unsigned)0xFFFF || state <= 12)
575 *timestamp = avio_rb32(pb);
576 avio_r8(pb); /* reserved */
577 *flags = avio_r8(pb); /* flags */
579 for(i=0;i<s->nb_streams;i++) {
584 if (i == s->nb_streams) {
586 /* skip packet if unknown number */
588 rm->remaining_len = 0;
598 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
599 RMDemuxContext *rm, RMStream *vst,
600 AVPacket *pkt, int len, int *pseq,
603 int hdr, seq, pic_num, len2, pos;
606 hdr = avio_r8(pb); len--;
609 if(type != 3){ // not frame as a part of packet
610 seq = avio_r8(pb); len--;
612 if(type != 1){ // not whole frame
613 len2 = get_num(pb, &len);
614 pos = get_num(pb, &len);
615 pic_num = avio_r8(pb); len--;
619 rm->remaining_len = len;
620 if(type&1){ // frame, not slice
621 if(type == 3){ // frame as a part of packet
625 if(rm->remaining_len < len)
627 rm->remaining_len -= len;
628 if(av_new_packet(pkt, len + 9) < 0)
631 AV_WL32(pkt->data + 1, 1);
632 AV_WL32(pkt->data + 5, 0);
633 avio_read(pb, pkt->data + 9, len);
636 //now we have to deal with single slice
639 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
640 vst->slices = ((hdr & 0x3F) << 1) + 1;
641 vst->videobufsize = len2 + 8*vst->slices + 1;
642 av_free_packet(&vst->pkt); //FIXME this should be output.
643 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
644 return AVERROR(ENOMEM);
645 vst->videobufpos = 8*vst->slices + 1;
647 vst->curpic_num = pic_num;
648 vst->pktpos = avio_tell(pb);
651 len = FFMIN(len, pos);
653 if(++vst->cur_slice > vst->slices)
655 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
656 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
657 if(vst->videobufpos + len > vst->videobufsize)
659 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
661 vst->videobufpos += len;
662 rm->remaining_len-= len;
664 if(type == 2 || (vst->videobufpos) == vst->videobufsize){
665 vst->pkt.data[0] = vst->cur_slice-1;
669 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
670 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
671 vst->videobufpos - 1 - 8*vst->slices);
672 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
673 pkt->pts = AV_NOPTS_VALUE;
674 pkt->pos = vst->pktpos;
683 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
688 if (st->codec->codec_id == CODEC_ID_AC3) {
690 for (j=0;j<pkt->size;j+=2) {
691 FFSWAP(int, ptr[0], ptr[1]);
698 * Perform 4-bit block reordering for SIPR data.
699 * @todo This can be optimized, e.g. use memcpy() if data blocks are aligned
701 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
703 int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket
705 for (n = 0; n < 38; n++) {
707 int i = bs * sipr_swaps[n][0];
708 int o = bs * sipr_swaps[n][1];
710 /* swap 4bit-nibbles of block 'i' with 'o' */
711 for (j = 0; j < bs; j++, i++, o++) {
712 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
713 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
715 buf[o >> 1] = (x << (4 * (o & 1))) |
716 (buf[o >> 1] & (0xF << (4 * !(o & 1))));
717 buf[i >> 1] = (y << (4 * (i & 1))) |
718 (buf[i >> 1] & (0xF << (4 * !(i & 1))));
724 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
725 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
726 int *seq, int flags, int64_t timestamp)
728 RMDemuxContext *rm = s->priv_data;
730 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
731 rm->current_stream= st->id;
732 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
733 return -1; //got partial frame
734 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
735 if ((ast->deint_id == DEINT_ID_GENR) ||
736 (ast->deint_id == DEINT_ID_INT4) ||
737 (ast->deint_id == DEINT_ID_SIPR)) {
739 int sps = ast->sub_packet_size;
740 int cfs = ast->coded_framesize;
741 int h = ast->sub_packet_h;
742 int y = ast->sub_packet_cnt;
743 int w = ast->audio_framesize;
746 y = ast->sub_packet_cnt = 0;
748 ast->audiotimestamp = timestamp;
750 switch (ast->deint_id) {
752 for (x = 0; x < h/2; x++)
753 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
756 for (x = 0; x < w/sps; x++)
757 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
760 avio_read(pb, ast->pkt.data + y * w, w);
764 if (++(ast->sub_packet_cnt) < h)
766 if (ast->deint_id == DEINT_ID_SIPR)
767 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
769 ast->sub_packet_cnt = 0;
770 rm->audio_stream_num = st->index;
771 rm->audio_pkt_cnt = h * w / st->codec->block_align;
772 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
773 (ast->deint_id == DEINT_ID_VBRS)) {
775 rm->audio_stream_num = st->index;
776 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
777 if (ast->sub_packet_cnt) {
778 for (x = 0; x < ast->sub_packet_cnt; x++)
779 ast->sub_packet_lengths[x] = avio_rb16(pb);
780 rm->audio_pkt_cnt = ast->sub_packet_cnt;
781 ast->audiotimestamp = timestamp;
785 av_get_packet(pb, pkt, len);
786 rm_ac3_swap_bytes(st, pkt);
789 av_get_packet(pb, pkt, len);
791 pkt->stream_index = st->index;
794 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
795 if(st->codec->codec_id == CODEC_ID_RV20){
796 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
797 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
799 seq |= (timestamp&~0x3FFF);
800 if(seq - timestamp > 0x2000) seq -= 0x4000;
801 if(seq - timestamp < -0x2000) seq += 0x4000;
806 pkt->pts = timestamp;
808 pkt->flags |= AV_PKT_FLAG_KEY;
810 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
814 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
815 AVStream *st, RMStream *ast, AVPacket *pkt)
817 RMDemuxContext *rm = s->priv_data;
819 assert (rm->audio_pkt_cnt > 0);
821 if (ast->deint_id == DEINT_ID_VBRF ||
822 ast->deint_id == DEINT_ID_VBRS)
823 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
825 av_new_packet(pkt, st->codec->block_align);
826 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
827 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
828 st->codec->block_align);
831 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
832 ast->audiotimestamp = AV_NOPTS_VALUE;
833 pkt->flags = AV_PKT_FLAG_KEY;
836 pkt->stream_index = st->index;
838 return rm->audio_pkt_cnt;
841 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
843 RMDemuxContext *rm = s->priv_data;
845 int i, len, res, seq = 1;
846 int64_t timestamp, pos;
850 if (rm->audio_pkt_cnt) {
851 // If there are queued audio packet return them first
852 st = s->streams[rm->audio_stream_num];
853 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
856 if (rm->old_format) {
861 timestamp = AV_NOPTS_VALUE;
862 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
863 ast->coded_framesize * ast->sub_packet_h / 2;
864 flags = (seq++ == 1) ? 2 : 0;
865 pos = avio_tell(s->pb);
867 len=sync(s, ×tamp, &flags, &i, &pos);
872 if(len<0 || s->pb->eof_reached)
875 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
876 &seq, flags, timestamp);
877 if((flags&2) && (seq&0x7F) == 1)
878 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
883 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
884 || st->discard >= AVDISCARD_ALL){
893 static int rm_read_close(AVFormatContext *s)
897 for (i=0;i<s->nb_streams;i++)
898 ff_rm_free_rmstream(s->streams[i]->priv_data);
903 static int rm_probe(AVProbeData *p)
905 /* check file header */
906 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
907 p->buf[2] == 'M' && p->buf[3] == 'F' &&
908 p->buf[4] == 0 && p->buf[5] == 0) ||
909 (p->buf[0] == '.' && p->buf[1] == 'r' &&
910 p->buf[2] == 'a' && p->buf[3] == 0xfd))
911 return AVPROBE_SCORE_MAX;
916 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
917 int64_t *ppos, int64_t pos_limit)
919 RMDemuxContext *rm = s->priv_data;
921 int stream_index2, flags, len, h;
926 return AV_NOPTS_VALUE;
928 avio_seek(s->pb, pos, SEEK_SET);
934 len=sync(s, &dts, &flags, &stream_index2, &pos);
936 return AV_NOPTS_VALUE;
938 st = s->streams[stream_index2];
939 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
940 h= avio_r8(s->pb); len--;
942 seq = avio_r8(s->pb); len--;
946 if((flags&2) && (seq&0x7F) == 1){
947 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
948 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
949 if(stream_index2 == stream_index)
953 avio_skip(s->pb, len);
959 AVInputFormat ff_rm_demuxer = {
961 .long_name = NULL_IF_CONFIG_SMALL("RealMedia format"),
962 .priv_data_size = sizeof(RMDemuxContext),
963 .read_probe = rm_probe,
964 .read_header = rm_read_header,
965 .read_packet = rm_read_packet,
966 .read_close = rm_read_close,
967 .read_timestamp = rm_read_dts,
970 AVInputFormat ff_rdt_demuxer = {
972 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
973 .priv_data_size = sizeof(RMDemuxContext),
974 .read_close = rm_read_close,