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
22 #include "libavutil/avstring.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/dict.h"
27 #include "avio_internal.h"
31 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac
32 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
33 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
34 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
35 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
36 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
39 AVPacket pkt; ///< place to store merged video frame / reordered audio data
40 int videobufsize; ///< current assembled frame size
41 int videobufpos; ///< position for the next slice in the video buffer
42 int curpic_num; ///< picture number of current frame
43 int cur_slice, slices;
44 int64_t pktpos; ///< first slice position in file
45 /// Audio descrambling matrix parameters
46 int64_t audiotimestamp; ///< Audio packet timestamp
47 int sub_packet_cnt; // Subpacket counter, used while reading
48 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
49 int audio_framesize; /// Audio frame size from container
50 int sub_packet_lengths[16]; /// Length of each subpacket
51 int32_t deint_id; ///< deinterleaver used in audio stream
59 int audio_stream_num; ///< Stream number for audio packets
60 int audio_pkt_cnt; ///< Output packet counter
63 static const unsigned char sipr_swaps[38][2] = {
64 { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
65 { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
66 { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
67 { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
68 { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
69 { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
70 { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
71 { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
72 { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
73 { 67, 83 }, { 77, 80 }
76 const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
78 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
89 if (buf_size > 0) *q = '\0';
92 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
94 get_strl(pb, buf, buf_size, avio_r8(pb));
97 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
101 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
102 if (!avctx->extradata)
103 return AVERROR(ENOMEM);
104 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
105 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
106 if (avctx->extradata_size != size)
111 static void rm_read_metadata(AVFormatContext *s, int wide)
115 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
116 int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb);
117 get_strl(s->pb, buf, sizeof(buf), len);
118 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
122 RMStream *ff_rm_alloc_rmstream (void)
124 RMStream *rms = av_mallocz(sizeof(RMStream));
125 rms->curpic_num = -1;
129 void ff_rm_free_rmstream (RMStream *rms)
131 av_free_packet(&rms->pkt);
134 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
135 AVStream *st, RMStream *ast, int read_all)
142 version = avio_rb16(pb); /* version */
144 int header_size = avio_rb16(pb);
145 int64_t startpos = avio_tell(pb);
147 rm_read_metadata(s, 0);
148 if ((startpos + header_size) >= avio_tell(pb) + 2) {
149 // fourcc (should always be "lpcJ")
151 get_str8(pb, buf, sizeof(buf));
153 // Skip extra header crap (this should never happen)
154 if ((startpos + header_size) > avio_tell(pb))
155 avio_skip(pb, header_size + startpos - avio_tell(pb));
156 st->codec->sample_rate = 8000;
157 st->codec->channels = 1;
158 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
159 st->codec->codec_id = CODEC_ID_RA_144;
160 ast->deint_id = DEINT_ID_INT0;
162 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
163 int codecdata_length;
164 /* old version (4) */
165 avio_skip(pb, 2); /* unused */
166 avio_rb32(pb); /* .ra4 */
167 avio_rb32(pb); /* data size */
168 avio_rb16(pb); /* version2 */
169 avio_rb32(pb); /* header size */
170 flavor= avio_rb16(pb); /* add codec info / flavor */
171 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
172 avio_rb32(pb); /* ??? */
173 avio_rb32(pb); /* ??? */
174 avio_rb32(pb); /* ??? */
175 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
176 st->codec->block_align= avio_rb16(pb); /* frame size */
177 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
178 avio_rb16(pb); /* ??? */
180 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
182 st->codec->sample_rate = avio_rb16(pb);
184 st->codec->channels = avio_rb16(pb);
186 ast->deint_id = avio_rl32(pb);
187 avio_read(pb, buf, 4);
190 get_str8(pb, buf, sizeof(buf)); /* desc */
191 ast->deint_id = AV_RL32(buf);
192 get_str8(pb, buf, sizeof(buf)); /* desc */
194 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
195 st->codec->codec_tag = AV_RL32(buf);
196 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
197 st->codec->codec_tag);
199 switch (st->codec->codec_id) {
201 st->need_parsing = AVSTREAM_PARSE_FULL;
203 case CODEC_ID_RA_288:
204 st->codec->extradata_size= 0;
205 ast->audio_framesize = st->codec->block_align;
206 st->codec->block_align = coded_framesize;
209 case CODEC_ID_ATRAC3:
211 avio_rb16(pb); avio_r8(pb);
214 codecdata_length = avio_rb32(pb);
215 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
216 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
220 ast->audio_framesize = st->codec->block_align;
221 if (st->codec->codec_id == CODEC_ID_SIPR) {
223 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
227 st->codec->block_align = ff_sipr_subpk_size[flavor];
229 if(sub_packet_size <= 0){
230 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
233 st->codec->block_align = ast->sub_packet_size;
235 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
240 avio_rb16(pb); avio_r8(pb);
243 codecdata_length = avio_rb32(pb);
244 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
245 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
248 if (codecdata_length >= 1) {
250 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
255 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
257 if (ast->deint_id == DEINT_ID_INT4 ||
258 ast->deint_id == DEINT_ID_GENR ||
259 ast->deint_id == DEINT_ID_SIPR) {
260 if (st->codec->block_align <= 0 ||
261 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
262 ast->audio_framesize * sub_packet_h < st->codec->block_align)
263 return AVERROR_INVALIDDATA;
264 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
265 return AVERROR(ENOMEM);
267 switch (ast->deint_id) {
269 if (ast->coded_framesize > ast->audio_framesize ||
270 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
271 return AVERROR_INVALIDDATA;
274 if (ast->sub_packet_size <= 0 ||
275 ast->sub_packet_size > ast->audio_framesize)
276 return AVERROR_INVALIDDATA;
284 av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
285 return AVERROR_INVALIDDATA;
292 rm_read_metadata(s, 0);
299 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
300 AVStream *st, RMStream *rst, int codec_data_size)
307 avpriv_set_pts_info(st, 64, 1, 1000);
308 codec_pos = avio_tell(pb);
310 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
312 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
316 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
318 av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
321 st->codec->codec_tag = avio_rl32(pb);
322 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
323 st->codec->codec_tag);
324 // av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
325 if (st->codec->codec_id == CODEC_ID_NONE)
327 st->codec->width = avio_rb16(pb);
328 st->codec->height = avio_rb16(pb);
329 avio_skip(pb, 2); // looks like bits per sample
330 avio_skip(pb, 4); // always zero?
331 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
332 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
335 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
338 av_reduce(&st->r_frame_rate.den, &st->r_frame_rate.num,
339 0x10000, fps, (1 << 30) - 1);
340 st->avg_frame_rate = st->r_frame_rate;
344 /* skip codec info */
345 size = avio_tell(pb) - codec_pos;
346 avio_skip(pb, codec_data_size - size);
351 /** this function assumes that the demuxer has already seeked to the start
352 * of the INDX chunk, and will bail out if not. */
353 static int rm_read_index(AVFormatContext *s)
355 AVIOContext *pb = s->pb;
356 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
360 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
362 size = avio_rb32(pb);
366 n_pkts = avio_rb32(pb);
367 str_id = avio_rb16(pb);
368 next_off = avio_rb32(pb);
369 for (n = 0; n < s->nb_streams; n++)
370 if (s->streams[n]->id == str_id) {
374 if (n == s->nb_streams)
377 for (n = 0; n < n_pkts; n++) {
381 avio_skip(pb, 4); /* packet no. */
383 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
387 if (next_off && avio_tell(pb) != next_off &&
388 avio_seek(pb, next_off, SEEK_SET) < 0)
395 static int rm_read_header_old(AVFormatContext *s)
397 RMDemuxContext *rm = s->priv_data;
401 st = avformat_new_stream(s, NULL);
404 st->priv_data = ff_rm_alloc_rmstream();
405 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
408 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
410 RMDemuxContext *rm = s->priv_data;
412 AVIOContext *pb = s->pb;
415 unsigned int start_time, duration;
416 unsigned int data_off = 0, indx_off = 0;
421 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
422 /* very old .ra format */
423 return rm_read_header_old(s);
424 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
428 avio_rb32(pb); /* header size */
431 avio_rb32(pb); /* number of headers */
437 tag_size = avio_rb32(pb);
439 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
446 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
449 case MKTAG('P', 'R', 'O', 'P'):
451 avio_rb32(pb); /* max bit rate */
452 avio_rb32(pb); /* avg bit rate */
453 avio_rb32(pb); /* max packet size */
454 avio_rb32(pb); /* avg packet size */
455 avio_rb32(pb); /* nb packets */
456 avio_rb32(pb); /* duration */
457 avio_rb32(pb); /* preroll */
458 indx_off = avio_rb32(pb); /* index offset */
459 data_off = avio_rb32(pb); /* data offset */
460 avio_rb16(pb); /* nb streams */
461 flags = avio_rb16(pb); /* flags */
463 case MKTAG('C', 'O', 'N', 'T'):
464 rm_read_metadata(s, 1);
466 case MKTAG('M', 'D', 'P', 'R'):
467 st = avformat_new_stream(s, NULL);
469 return AVERROR(ENOMEM);
470 st->id = avio_rb16(pb);
471 avio_rb32(pb); /* max bit rate */
472 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
473 avio_rb32(pb); /* max packet size */
474 avio_rb32(pb); /* avg packet size */
475 start_time = avio_rb32(pb); /* start time */
476 avio_rb32(pb); /* preroll */
477 duration = avio_rb32(pb); /* duration */
478 st->start_time = start_time;
479 st->duration = duration;
480 get_str8(pb, buf, sizeof(buf)); /* desc */
481 get_str8(pb, buf, sizeof(buf)); /* mimetype */
482 st->codec->codec_type = AVMEDIA_TYPE_DATA;
483 st->priv_data = ff_rm_alloc_rmstream();
484 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
488 case MKTAG('D', 'A', 'T', 'A'):
491 /* unknown tag: skip it */
492 avio_skip(pb, tag_size - 10);
497 rm->nb_packets = avio_rb32(pb); /* number of packets */
498 if (!rm->nb_packets && (flags & 4))
499 rm->nb_packets = 3600 * 25;
500 avio_rb32(pb); /* next data header */
503 data_off = avio_tell(pb) - 18;
504 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
505 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
507 avio_seek(pb, data_off + 18, SEEK_SET);
513 static int get_num(AVIOContext *pb, int *len)
525 return (n << 16) | n1;
529 /* multiple of 20 bytes for ra144 (ugly) */
530 #define RAW_PACKET_SIZE 1000
532 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
533 RMDemuxContext *rm = s->priv_data;
534 AVIOContext *pb = s->pb;
536 uint32_t state=0xFFFFFFFF;
538 while(!url_feof(pb)){
540 *pos= avio_tell(pb) - 3;
541 if(rm->remaining_len > 0){
542 num= rm->current_stream;
543 len= rm->remaining_len;
544 *timestamp = AV_NOPTS_VALUE;
547 state= (state<<8) + avio_r8(pb);
549 if(state == MKBETAG('I', 'N', 'D', 'X')){
550 int n_pkts, expected_len;
553 n_pkts = avio_rb32(pb);
554 expected_len = 20 + n_pkts * 14;
556 /* some files don't add index entries to chunk size... */
558 else if (len != expected_len)
559 av_log(s, AV_LOG_WARNING,
560 "Index size %d (%d pkts) is wrong, should be %d.\n",
561 len, n_pkts, expected_len);
562 len -= 14; // we already read part of the index header
566 } else if (state == MKBETAG('D','A','T','A')) {
567 av_log(s, AV_LOG_WARNING,
568 "DATA tag in middle of chunk, file may be broken.\n");
571 if(state > (unsigned)0xFFFF || state <= 12)
577 *timestamp = avio_rb32(pb);
578 avio_r8(pb); /* reserved */
579 *flags = avio_r8(pb); /* flags */
581 for(i=0;i<s->nb_streams;i++) {
586 if (i == s->nb_streams) {
588 /* skip packet if unknown number */
590 rm->remaining_len = 0;
600 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
601 RMDemuxContext *rm, RMStream *vst,
602 AVPacket *pkt, int len, int *pseq,
605 int hdr, seq, pic_num, len2, pos;
608 hdr = avio_r8(pb); len--;
611 if(type != 3){ // not frame as a part of packet
612 seq = avio_r8(pb); len--;
614 if(type != 1){ // not whole frame
615 len2 = get_num(pb, &len);
616 len2 = ffio_limit(pb, len2);
617 pos = get_num(pb, &len);
618 pic_num = avio_r8(pb); len--;
622 rm->remaining_len = len;
623 if(type&1){ // frame, not slice
624 if(type == 3){ // frame as a part of packet
628 if(rm->remaining_len < len)
630 rm->remaining_len -= len;
631 if(av_new_packet(pkt, len + 9) < 0)
634 AV_WL32(pkt->data + 1, 1);
635 AV_WL32(pkt->data + 5, 0);
636 avio_read(pb, pkt->data + 9, len);
639 //now we have to deal with single slice
642 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
643 vst->slices = ((hdr & 0x3F) << 1) + 1;
644 vst->videobufsize = len2 + 8*vst->slices + 1;
645 av_free_packet(&vst->pkt); //FIXME this should be output.
646 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
647 return AVERROR(ENOMEM);
648 vst->videobufpos = 8*vst->slices + 1;
650 vst->curpic_num = pic_num;
651 vst->pktpos = avio_tell(pb);
654 len = FFMIN(len, pos);
656 if(++vst->cur_slice > vst->slices)
658 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
659 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
660 if(vst->videobufpos + len > vst->videobufsize)
662 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
664 vst->videobufpos += len;
665 rm->remaining_len-= len;
667 if(type == 2 || (vst->videobufpos) == vst->videobufsize){
668 vst->pkt.data[0] = vst->cur_slice-1;
672 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
673 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
674 vst->videobufpos - 1 - 8*vst->slices);
675 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
676 pkt->pts = AV_NOPTS_VALUE;
677 pkt->pos = vst->pktpos;
686 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
691 if (st->codec->codec_id == CODEC_ID_AC3) {
693 for (j=0;j<pkt->size;j+=2) {
694 FFSWAP(int, ptr[0], ptr[1]);
701 * Perform 4-bit block reordering for SIPR data.
702 * @todo This can be optimized, e.g. use memcpy() if data blocks are aligned
704 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
706 int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket
708 for (n = 0; n < 38; n++) {
710 int i = bs * sipr_swaps[n][0];
711 int o = bs * sipr_swaps[n][1];
713 /* swap 4bit-nibbles of block 'i' with 'o' */
714 for (j = 0; j < bs; j++, i++, o++) {
715 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
716 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
718 buf[o >> 1] = (x << (4 * (o & 1))) |
719 (buf[o >> 1] & (0xF << (4 * !(o & 1))));
720 buf[i >> 1] = (y << (4 * (i & 1))) |
721 (buf[i >> 1] & (0xF << (4 * !(i & 1))));
727 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
728 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
729 int *seq, int flags, int64_t timestamp)
731 RMDemuxContext *rm = s->priv_data;
733 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
734 rm->current_stream= st->id;
735 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
736 return -1; //got partial frame
737 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
738 if ((ast->deint_id == DEINT_ID_GENR) ||
739 (ast->deint_id == DEINT_ID_INT4) ||
740 (ast->deint_id == DEINT_ID_SIPR)) {
742 int sps = ast->sub_packet_size;
743 int cfs = ast->coded_framesize;
744 int h = ast->sub_packet_h;
745 int y = ast->sub_packet_cnt;
746 int w = ast->audio_framesize;
749 y = ast->sub_packet_cnt = 0;
751 ast->audiotimestamp = timestamp;
753 switch (ast->deint_id) {
755 for (x = 0; x < h/2; x++)
756 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
759 for (x = 0; x < w/sps; x++)
760 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
763 avio_read(pb, ast->pkt.data + y * w, w);
767 if (++(ast->sub_packet_cnt) < h)
769 if (ast->deint_id == DEINT_ID_SIPR)
770 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
772 ast->sub_packet_cnt = 0;
773 rm->audio_stream_num = st->index;
774 rm->audio_pkt_cnt = h * w / st->codec->block_align;
775 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
776 (ast->deint_id == DEINT_ID_VBRS)) {
778 rm->audio_stream_num = st->index;
779 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
780 if (ast->sub_packet_cnt) {
781 for (x = 0; x < ast->sub_packet_cnt; x++)
782 ast->sub_packet_lengths[x] = avio_rb16(pb);
783 rm->audio_pkt_cnt = ast->sub_packet_cnt;
784 ast->audiotimestamp = timestamp;
788 av_get_packet(pb, pkt, len);
789 rm_ac3_swap_bytes(st, pkt);
792 av_get_packet(pb, pkt, len);
794 pkt->stream_index = st->index;
797 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
798 if(st->codec->codec_id == CODEC_ID_RV20){
799 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
800 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
802 seq |= (timestamp&~0x3FFF);
803 if(seq - timestamp > 0x2000) seq -= 0x4000;
804 if(seq - timestamp < -0x2000) seq += 0x4000;
809 pkt->pts = timestamp;
811 pkt->flags |= AV_PKT_FLAG_KEY;
813 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
817 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
818 AVStream *st, RMStream *ast, AVPacket *pkt)
820 RMDemuxContext *rm = s->priv_data;
822 assert (rm->audio_pkt_cnt > 0);
824 if (ast->deint_id == DEINT_ID_VBRF ||
825 ast->deint_id == DEINT_ID_VBRS)
826 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
828 av_new_packet(pkt, st->codec->block_align);
829 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
830 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
831 st->codec->block_align);
834 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
835 ast->audiotimestamp = AV_NOPTS_VALUE;
836 pkt->flags = AV_PKT_FLAG_KEY;
839 pkt->stream_index = st->index;
841 return rm->audio_pkt_cnt;
844 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
846 RMDemuxContext *rm = s->priv_data;
848 int i, len, res, seq = 1;
849 int64_t timestamp, pos;
853 if (rm->audio_pkt_cnt) {
854 // If there are queued audio packet return them first
855 st = s->streams[rm->audio_stream_num];
856 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
859 if (rm->old_format) {
864 timestamp = AV_NOPTS_VALUE;
865 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
866 ast->coded_framesize * ast->sub_packet_h / 2;
867 flags = (seq++ == 1) ? 2 : 0;
868 pos = avio_tell(s->pb);
870 len=sync(s, ×tamp, &flags, &i, &pos);
875 if(len<0 || url_feof(s->pb))
878 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
879 &seq, flags, timestamp);
880 if((flags&2) && (seq&0x7F) == 1)
881 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
886 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
887 || st->discard >= AVDISCARD_ALL){
896 static int rm_read_close(AVFormatContext *s)
900 for (i=0;i<s->nb_streams;i++)
901 ff_rm_free_rmstream(s->streams[i]->priv_data);
906 static int rm_probe(AVProbeData *p)
908 /* check file header */
909 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
910 p->buf[2] == 'M' && p->buf[3] == 'F' &&
911 p->buf[4] == 0 && p->buf[5] == 0) ||
912 (p->buf[0] == '.' && p->buf[1] == 'r' &&
913 p->buf[2] == 'a' && p->buf[3] == 0xfd))
914 return AVPROBE_SCORE_MAX;
919 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
920 int64_t *ppos, int64_t pos_limit)
922 RMDemuxContext *rm = s->priv_data;
924 int stream_index2, flags, len, h;
929 return AV_NOPTS_VALUE;
931 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
932 return AV_NOPTS_VALUE;
939 len=sync(s, &dts, &flags, &stream_index2, &pos);
941 return AV_NOPTS_VALUE;
943 st = s->streams[stream_index2];
944 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
945 h= avio_r8(s->pb); len--;
947 seq = avio_r8(s->pb); len--;
951 if((flags&2) && (seq&0x7F) == 1){
952 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
953 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
954 if(stream_index2 == stream_index)
958 avio_skip(s->pb, len);
964 AVInputFormat ff_rm_demuxer = {
966 .long_name = NULL_IF_CONFIG_SMALL("RealMedia format"),
967 .priv_data_size = sizeof(RMDemuxContext),
968 .read_probe = rm_probe,
969 .read_header = rm_read_header,
970 .read_packet = rm_read_packet,
971 .read_close = rm_read_close,
972 .read_timestamp = rm_read_dts,
975 AVInputFormat ff_rdt_demuxer = {
977 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
978 .priv_data_size = sizeof(RMDemuxContext),
979 .read_close = rm_read_close,
980 .flags = AVFMT_NOFILE,