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"
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 inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
74 if (buf_size > 0) *q = '\0';
77 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
79 get_strl(pb, buf, buf_size, avio_r8(pb));
82 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
86 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
87 if (!avctx->extradata)
88 return AVERROR(ENOMEM);
89 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
90 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
91 if (avctx->extradata_size != size)
96 static void rm_read_metadata(AVFormatContext *s, int wide)
100 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
101 int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb);
102 get_strl(s->pb, buf, sizeof(buf), len);
103 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
107 RMStream *ff_rm_alloc_rmstream (void)
109 RMStream *rms = av_mallocz(sizeof(RMStream));
110 rms->curpic_num = -1;
114 void ff_rm_free_rmstream (RMStream *rms)
116 av_free_packet(&rms->pkt);
119 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
120 AVStream *st, RMStream *ast, int read_all)
127 version = avio_rb16(pb); /* version */
129 int header_size = avio_rb16(pb);
130 int64_t startpos = avio_tell(pb);
132 rm_read_metadata(s, 0);
133 if ((startpos + header_size) >= avio_tell(pb) + 2) {
134 // fourcc (should always be "lpcJ")
136 get_str8(pb, buf, sizeof(buf));
138 // Skip extra header crap (this should never happen)
139 if ((startpos + header_size) > avio_tell(pb))
140 avio_skip(pb, header_size + startpos - avio_tell(pb));
141 st->codec->sample_rate = 8000;
142 st->codec->channels = 1;
143 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
144 st->codec->codec_id = AV_CODEC_ID_RA_144;
145 ast->deint_id = DEINT_ID_INT0;
147 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
148 int codecdata_length;
149 /* old version (4) */
150 avio_skip(pb, 2); /* unused */
151 avio_rb32(pb); /* .ra4 */
152 avio_rb32(pb); /* data size */
153 avio_rb16(pb); /* version2 */
154 avio_rb32(pb); /* header size */
155 flavor= avio_rb16(pb); /* add codec info / flavor */
156 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
157 avio_rb32(pb); /* ??? */
158 avio_rb32(pb); /* ??? */
159 avio_rb32(pb); /* ??? */
160 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
161 st->codec->block_align= avio_rb16(pb); /* frame size */
162 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
163 avio_rb16(pb); /* ??? */
165 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
167 st->codec->sample_rate = avio_rb16(pb);
169 st->codec->channels = avio_rb16(pb);
171 ast->deint_id = avio_rl32(pb);
172 avio_read(pb, buf, 4);
175 get_str8(pb, buf, sizeof(buf)); /* desc */
176 ast->deint_id = AV_RL32(buf);
177 get_str8(pb, buf, sizeof(buf)); /* desc */
179 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
180 st->codec->codec_tag = AV_RL32(buf);
181 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
182 st->codec->codec_tag);
184 switch (st->codec->codec_id) {
185 case AV_CODEC_ID_AC3:
186 st->need_parsing = AVSTREAM_PARSE_FULL;
188 case AV_CODEC_ID_RA_288:
189 st->codec->extradata_size= 0;
190 ast->audio_framesize = st->codec->block_align;
191 st->codec->block_align = coded_framesize;
193 case AV_CODEC_ID_COOK:
194 st->need_parsing = AVSTREAM_PARSE_HEADERS;
195 case AV_CODEC_ID_ATRAC3:
196 case AV_CODEC_ID_SIPR:
197 avio_rb16(pb); avio_r8(pb);
200 codecdata_length = avio_rb32(pb);
201 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
202 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
206 ast->audio_framesize = st->codec->block_align;
207 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
209 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
213 st->codec->block_align = ff_sipr_subpk_size[flavor];
215 if(sub_packet_size <= 0){
216 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
219 st->codec->block_align = ast->sub_packet_size;
221 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
224 case AV_CODEC_ID_AAC:
225 avio_rb16(pb); avio_r8(pb);
228 codecdata_length = avio_rb32(pb);
229 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
230 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
233 if (codecdata_length >= 1) {
235 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
240 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
242 if (ast->deint_id == DEINT_ID_INT4 ||
243 ast->deint_id == DEINT_ID_GENR ||
244 ast->deint_id == DEINT_ID_SIPR) {
245 if (st->codec->block_align <= 0 ||
246 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
247 ast->audio_framesize * sub_packet_h < st->codec->block_align)
248 return AVERROR_INVALIDDATA;
249 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
250 return AVERROR(ENOMEM);
252 switch (ast->deint_id) {
254 if (ast->coded_framesize > ast->audio_framesize ||
256 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
257 return AVERROR_INVALIDDATA;
260 if (ast->sub_packet_size <= 0 ||
261 ast->sub_packet_size > ast->audio_framesize)
262 return AVERROR_INVALIDDATA;
270 av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
271 return AVERROR_INVALIDDATA;
278 rm_read_metadata(s, 0);
285 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
286 AVStream *st, RMStream *rst, int codec_data_size)
293 avpriv_set_pts_info(st, 64, 1, 1000);
294 codec_pos = avio_tell(pb);
296 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
298 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
300 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
301 avio_seek(pb, -4, SEEK_CUR);
302 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
305 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
306 st->codec->codec_tag = AV_RL32(st->codec->extradata);
307 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
308 st->codec->codec_tag);
311 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
313 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
316 st->codec->codec_tag = avio_rl32(pb);
317 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
318 st->codec->codec_tag);
319 av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
320 if (st->codec->codec_id == AV_CODEC_ID_NONE)
322 st->codec->width = avio_rb16(pb);
323 st->codec->height = avio_rb16(pb);
324 avio_skip(pb, 2); // looks like bits per sample
325 avio_skip(pb, 4); // always zero?
326 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
327 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
330 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
333 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
334 0x10000, fps, (1 << 30) - 1);
335 #if FF_API_R_FRAME_RATE
336 st->r_frame_rate = st->avg_frame_rate;
341 /* skip codec info */
342 size = avio_tell(pb) - codec_pos;
343 avio_skip(pb, codec_data_size - size);
348 /** this function assumes that the demuxer has already seeked to the start
349 * of the INDX chunk, and will bail out if not. */
350 static int rm_read_index(AVFormatContext *s)
352 AVIOContext *pb = s->pb;
353 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
357 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
359 size = avio_rb32(pb);
363 n_pkts = avio_rb32(pb);
364 str_id = avio_rb16(pb);
365 next_off = avio_rb32(pb);
366 for (n = 0; n < s->nb_streams; n++)
367 if (s->streams[n]->id == str_id) {
371 if (n == s->nb_streams) {
372 av_log(s, AV_LOG_ERROR,
373 "Invalid stream index %d for index at pos %"PRId64"\n",
374 str_id, avio_tell(pb));
376 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
377 av_log(s, AV_LOG_ERROR,
378 "Nr. of packets in packet index for stream index %d "
379 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
380 str_id, avio_size(pb), avio_tell(pb),
381 (avio_size(pb) - avio_tell(pb)) / 14);
385 for (n = 0; n < n_pkts; n++) {
389 avio_skip(pb, 4); /* packet no. */
391 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
395 if (next_off && avio_tell(pb) < next_off &&
396 avio_seek(pb, next_off, SEEK_SET) < 0) {
397 av_log(s, AV_LOG_ERROR,
398 "Non-linear index detected, not supported\n");
406 static int rm_read_header_old(AVFormatContext *s)
408 RMDemuxContext *rm = s->priv_data;
412 st = avformat_new_stream(s, NULL);
415 st->priv_data = ff_rm_alloc_rmstream();
416 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
419 static int rm_read_header(AVFormatContext *s)
421 RMDemuxContext *rm = s->priv_data;
423 AVIOContext *pb = s->pb;
426 unsigned int start_time, duration;
427 unsigned int data_off = 0, indx_off = 0;
432 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
433 /* very old .ra format */
434 return rm_read_header_old(s);
435 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
439 tag_size = avio_rb32(pb);
440 avio_skip(pb, tag_size - 8);
446 tag_size = avio_rb32(pb);
448 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
455 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
458 case MKTAG('P', 'R', 'O', 'P'):
460 avio_rb32(pb); /* max bit rate */
461 avio_rb32(pb); /* avg bit rate */
462 avio_rb32(pb); /* max packet size */
463 avio_rb32(pb); /* avg packet size */
464 avio_rb32(pb); /* nb packets */
465 avio_rb32(pb); /* duration */
466 avio_rb32(pb); /* preroll */
467 indx_off = avio_rb32(pb); /* index offset */
468 data_off = avio_rb32(pb); /* data offset */
469 avio_rb16(pb); /* nb streams */
470 flags = avio_rb16(pb); /* flags */
472 case MKTAG('C', 'O', 'N', 'T'):
473 rm_read_metadata(s, 1);
475 case MKTAG('M', 'D', 'P', 'R'):
476 st = avformat_new_stream(s, NULL);
478 return AVERROR(ENOMEM);
479 st->id = avio_rb16(pb);
480 avio_rb32(pb); /* max bit rate */
481 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
482 avio_rb32(pb); /* max packet size */
483 avio_rb32(pb); /* avg packet size */
484 start_time = avio_rb32(pb); /* start time */
485 avio_rb32(pb); /* preroll */
486 duration = avio_rb32(pb); /* duration */
487 st->start_time = start_time;
488 st->duration = duration;
489 get_str8(pb, buf, sizeof(buf)); /* desc */
490 get_str8(pb, buf, sizeof(buf)); /* mimetype */
491 st->codec->codec_type = AVMEDIA_TYPE_DATA;
492 st->priv_data = ff_rm_alloc_rmstream();
493 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
497 case MKTAG('D', 'A', 'T', 'A'):
500 /* unknown tag: skip it */
501 avio_skip(pb, tag_size - 10);
506 rm->nb_packets = avio_rb32(pb); /* number of packets */
507 if (!rm->nb_packets && (flags & 4))
508 rm->nb_packets = 3600 * 25;
509 avio_rb32(pb); /* next data header */
512 data_off = avio_tell(pb) - 18;
513 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
514 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
516 avio_seek(pb, data_off + 18, SEEK_SET);
522 static int get_num(AVIOContext *pb, int *len)
534 return (n << 16) | n1;
538 /* multiple of 20 bytes for ra144 (ugly) */
539 #define RAW_PACKET_SIZE 1000
541 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
542 RMDemuxContext *rm = s->priv_data;
543 AVIOContext *pb = s->pb;
545 uint32_t state=0xFFFFFFFF;
547 while(!pb->eof_reached){
549 *pos= avio_tell(pb) - 3;
550 if(rm->remaining_len > 0){
551 num= rm->current_stream;
552 len= rm->remaining_len;
553 *timestamp = AV_NOPTS_VALUE;
556 state= (state<<8) + avio_r8(pb);
558 if(state == MKBETAG('I', 'N', 'D', 'X')){
559 int n_pkts, expected_len;
562 n_pkts = avio_rb32(pb);
563 expected_len = 20 + n_pkts * 14;
565 /* some files don't add index entries to chunk size... */
567 else if (len != expected_len)
568 av_log(s, AV_LOG_WARNING,
569 "Index size %d (%d pkts) is wrong, should be %d.\n",
570 len, n_pkts, expected_len);
571 len -= 14; // we already read part of the index header
575 } else if (state == MKBETAG('D','A','T','A')) {
576 av_log(s, AV_LOG_WARNING,
577 "DATA tag in middle of chunk, file may be broken.\n");
580 if(state > (unsigned)0xFFFF || state <= 12)
586 *timestamp = avio_rb32(pb);
587 avio_r8(pb); /* reserved */
588 *flags = avio_r8(pb); /* flags */
590 for(i=0;i<s->nb_streams;i++) {
595 if (i == s->nb_streams) {
597 /* skip packet if unknown number */
599 rm->remaining_len = 0;
609 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
610 RMDemuxContext *rm, RMStream *vst,
611 AVPacket *pkt, int len, int *pseq,
614 int hdr, seq, pic_num, len2, pos;
617 hdr = avio_r8(pb); len--;
620 if(type != 3){ // not frame as a part of packet
621 seq = avio_r8(pb); len--;
623 if(type != 1){ // not whole frame
624 len2 = get_num(pb, &len);
625 pos = get_num(pb, &len);
626 pic_num = avio_r8(pb); len--;
630 rm->remaining_len = len;
631 if(type&1){ // frame, not slice
632 if(type == 3){ // frame as a part of packet
636 if(rm->remaining_len < len)
638 rm->remaining_len -= len;
639 if(av_new_packet(pkt, len + 9) < 0)
642 AV_WL32(pkt->data + 1, 1);
643 AV_WL32(pkt->data + 5, 0);
644 avio_read(pb, pkt->data + 9, len);
647 //now we have to deal with single slice
650 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
651 vst->slices = ((hdr & 0x3F) << 1) + 1;
652 vst->videobufsize = len2 + 8*vst->slices + 1;
653 av_free_packet(&vst->pkt); //FIXME this should be output.
654 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
655 return AVERROR(ENOMEM);
656 vst->videobufpos = 8*vst->slices + 1;
658 vst->curpic_num = pic_num;
659 vst->pktpos = avio_tell(pb);
662 len = FFMIN(len, pos);
664 if(++vst->cur_slice > vst->slices)
666 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
667 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
668 if(vst->videobufpos + len > vst->videobufsize)
670 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
672 vst->videobufpos += len;
673 rm->remaining_len-= len;
675 if (type == 2 || vst->videobufpos == vst->videobufsize) {
676 vst->pkt.data[0] = vst->cur_slice-1;
680 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
681 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
682 vst->videobufpos - 1 - 8*vst->slices);
683 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
684 pkt->pts = AV_NOPTS_VALUE;
685 pkt->pos = vst->pktpos;
694 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
699 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
701 for (j=0;j<pkt->size;j+=2) {
702 FFSWAP(int, ptr[0], ptr[1]);
709 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
710 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
711 int *seq, int flags, int64_t timestamp)
713 RMDemuxContext *rm = s->priv_data;
715 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
716 rm->current_stream= st->id;
717 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
718 return -1; //got partial frame
719 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
720 if ((ast->deint_id == DEINT_ID_GENR) ||
721 (ast->deint_id == DEINT_ID_INT4) ||
722 (ast->deint_id == DEINT_ID_SIPR)) {
724 int sps = ast->sub_packet_size;
725 int cfs = ast->coded_framesize;
726 int h = ast->sub_packet_h;
727 int y = ast->sub_packet_cnt;
728 int w = ast->audio_framesize;
731 y = ast->sub_packet_cnt = 0;
733 ast->audiotimestamp = timestamp;
735 switch (ast->deint_id) {
737 for (x = 0; x < h/2; x++)
738 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
741 for (x = 0; x < w/sps; x++)
742 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
745 avio_read(pb, ast->pkt.data + y * w, w);
749 if (++(ast->sub_packet_cnt) < h)
751 if (ast->deint_id == DEINT_ID_SIPR)
752 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
754 ast->sub_packet_cnt = 0;
755 rm->audio_stream_num = st->index;
756 rm->audio_pkt_cnt = h * w / st->codec->block_align;
757 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
758 (ast->deint_id == DEINT_ID_VBRS)) {
760 rm->audio_stream_num = st->index;
761 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
762 if (ast->sub_packet_cnt) {
763 for (x = 0; x < ast->sub_packet_cnt; x++)
764 ast->sub_packet_lengths[x] = avio_rb16(pb);
765 rm->audio_pkt_cnt = ast->sub_packet_cnt;
766 ast->audiotimestamp = timestamp;
770 av_get_packet(pb, pkt, len);
771 rm_ac3_swap_bytes(st, pkt);
774 av_get_packet(pb, pkt, len);
776 pkt->stream_index = st->index;
779 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
780 if(st->codec->codec_id == AV_CODEC_ID_RV20){
781 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
782 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
784 seq |= (timestamp&~0x3FFF);
785 if(seq - timestamp > 0x2000) seq -= 0x4000;
786 if(seq - timestamp < -0x2000) seq += 0x4000;
791 pkt->pts = timestamp;
793 pkt->flags |= AV_PKT_FLAG_KEY;
795 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
799 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
800 AVStream *st, RMStream *ast, AVPacket *pkt)
802 RMDemuxContext *rm = s->priv_data;
804 assert (rm->audio_pkt_cnt > 0);
806 if (ast->deint_id == DEINT_ID_VBRF ||
807 ast->deint_id == DEINT_ID_VBRS)
808 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
810 av_new_packet(pkt, st->codec->block_align);
811 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
812 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
813 st->codec->block_align);
816 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
817 ast->audiotimestamp = AV_NOPTS_VALUE;
818 pkt->flags = AV_PKT_FLAG_KEY;
821 pkt->stream_index = st->index;
823 return rm->audio_pkt_cnt;
826 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
828 RMDemuxContext *rm = s->priv_data;
830 int i, len, res, seq = 1;
831 int64_t timestamp, pos;
835 if (rm->audio_pkt_cnt) {
836 // If there are queued audio packet return them first
837 st = s->streams[rm->audio_stream_num];
838 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
841 if (rm->old_format) {
846 timestamp = AV_NOPTS_VALUE;
847 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
848 ast->coded_framesize * ast->sub_packet_h / 2;
849 flags = (seq++ == 1) ? 2 : 0;
850 pos = avio_tell(s->pb);
852 len=sync(s, ×tamp, &flags, &i, &pos);
857 if(len<0 || s->pb->eof_reached)
860 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
861 &seq, flags, timestamp);
862 if((flags&2) && (seq&0x7F) == 1)
863 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
868 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
869 || st->discard >= AVDISCARD_ALL){
878 static int rm_read_close(AVFormatContext *s)
882 for (i=0;i<s->nb_streams;i++)
883 ff_rm_free_rmstream(s->streams[i]->priv_data);
888 static int rm_probe(AVProbeData *p)
890 /* check file header */
891 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
892 p->buf[2] == 'M' && p->buf[3] == 'F' &&
893 p->buf[4] == 0 && p->buf[5] == 0) ||
894 (p->buf[0] == '.' && p->buf[1] == 'r' &&
895 p->buf[2] == 'a' && p->buf[3] == 0xfd))
896 return AVPROBE_SCORE_MAX;
901 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
902 int64_t *ppos, int64_t pos_limit)
904 RMDemuxContext *rm = s->priv_data;
906 int stream_index2, flags, len, h;
911 return AV_NOPTS_VALUE;
913 avio_seek(s->pb, pos, SEEK_SET);
919 len=sync(s, &dts, &flags, &stream_index2, &pos);
921 return AV_NOPTS_VALUE;
923 st = s->streams[stream_index2];
924 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
925 h= avio_r8(s->pb); len--;
927 seq = avio_r8(s->pb); len--;
931 if((flags&2) && (seq&0x7F) == 1){
932 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
933 flags, stream_index2, stream_index, dts, seq);
934 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
935 if(stream_index2 == stream_index)
939 avio_skip(s->pb, len);
945 AVInputFormat ff_rm_demuxer = {
947 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
948 .priv_data_size = sizeof(RMDemuxContext),
949 .read_probe = rm_probe,
950 .read_header = rm_read_header,
951 .read_packet = rm_read_packet,
952 .read_close = rm_read_close,
953 .read_timestamp = rm_read_dts,
956 AVInputFormat ff_rdt_demuxer = {
958 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
959 .priv_data_size = sizeof(RMDemuxContext),
960 .read_close = rm_read_close,
961 .flags = AVFMT_NOFILE,