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/channel_layout.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/dict.h"
32 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/ATRAC
33 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
34 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
35 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
36 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
37 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
40 AVPacket pkt; ///< place to store merged video frame / reordered audio data
41 int videobufsize; ///< current assembled frame size
42 int videobufpos; ///< position for the next slice in the video buffer
43 int curpic_num; ///< picture number of current frame
44 int cur_slice, slices;
45 int64_t pktpos; ///< first slice position in file
46 /// Audio descrambling matrix parameters
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_framesize; /// Audio frame size from container
51 int sub_packet_lengths[16]; /// Length of each subpacket
52 int32_t deint_id; ///< deinterleaver used in audio stream
60 int audio_stream_num; ///< Stream number for audio packets
61 int audio_pkt_cnt; ///< Output packet counter
64 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
75 if (buf_size > 0) *q = '\0';
78 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
80 get_strl(pb, buf, buf_size, avio_r8(pb));
83 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
87 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
88 if (!avctx->extradata)
89 return AVERROR(ENOMEM);
90 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
91 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
92 if (avctx->extradata_size != size)
97 static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
101 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
102 int len = wide ? avio_rb16(pb) : avio_r8(pb);
103 get_strl(pb, buf, sizeof(buf), len);
104 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
108 RMStream *ff_rm_alloc_rmstream (void)
110 RMStream *rms = av_mallocz(sizeof(RMStream));
111 rms->curpic_num = -1;
115 void ff_rm_free_rmstream (RMStream *rms)
117 av_free_packet(&rms->pkt);
120 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
121 AVStream *st, RMStream *ast, int read_all)
128 version = avio_rb16(pb); /* version */
130 int header_size = avio_rb16(pb);
131 int64_t startpos = avio_tell(pb);
133 rm_read_metadata(s, pb, 0);
134 if ((startpos + header_size) >= avio_tell(pb) + 2) {
135 // fourcc (should always be "lpcJ")
137 get_str8(pb, buf, sizeof(buf));
139 // Skip extra header crap (this should never happen)
140 if ((startpos + header_size) > avio_tell(pb))
141 avio_skip(pb, header_size + startpos - avio_tell(pb));
142 st->codec->sample_rate = 8000;
143 st->codec->channels = 1;
144 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
145 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
146 st->codec->codec_id = AV_CODEC_ID_RA_144;
147 ast->deint_id = DEINT_ID_INT0;
149 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
150 int codecdata_length;
151 /* old version (4) */
152 avio_skip(pb, 2); /* unused */
153 avio_rb32(pb); /* .ra4 */
154 avio_rb32(pb); /* data size */
155 avio_rb16(pb); /* version2 */
156 avio_rb32(pb); /* header size */
157 flavor= avio_rb16(pb); /* add codec info / flavor */
158 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
159 avio_rb32(pb); /* ??? */
160 avio_rb32(pb); /* ??? */
161 avio_rb32(pb); /* ??? */
162 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
163 st->codec->block_align= avio_rb16(pb); /* frame size */
164 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
165 avio_rb16(pb); /* ??? */
167 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
169 st->codec->sample_rate = avio_rb16(pb);
171 st->codec->channels = avio_rb16(pb);
173 ast->deint_id = avio_rl32(pb);
174 avio_read(pb, buf, 4);
177 get_str8(pb, buf, sizeof(buf)); /* desc */
178 ast->deint_id = AV_RL32(buf);
179 get_str8(pb, buf, sizeof(buf)); /* desc */
181 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
182 st->codec->codec_tag = AV_RL32(buf);
183 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
184 st->codec->codec_tag);
186 switch (st->codec->codec_id) {
187 case AV_CODEC_ID_AC3:
188 st->need_parsing = AVSTREAM_PARSE_FULL;
190 case AV_CODEC_ID_RA_288:
191 st->codec->extradata_size= 0;
192 ast->audio_framesize = st->codec->block_align;
193 st->codec->block_align = coded_framesize;
195 case AV_CODEC_ID_COOK:
196 st->need_parsing = AVSTREAM_PARSE_HEADERS;
197 case AV_CODEC_ID_ATRAC3:
198 case AV_CODEC_ID_SIPR:
199 avio_rb16(pb); avio_r8(pb);
202 codecdata_length = avio_rb32(pb);
203 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
204 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
208 ast->audio_framesize = st->codec->block_align;
209 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
211 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
215 st->codec->block_align = ff_sipr_subpk_size[flavor];
217 if(sub_packet_size <= 0){
218 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
221 st->codec->block_align = ast->sub_packet_size;
223 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
226 case AV_CODEC_ID_AAC:
227 avio_rb16(pb); avio_r8(pb);
230 codecdata_length = avio_rb32(pb);
231 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
232 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
235 if (codecdata_length >= 1) {
237 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
242 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
244 if (ast->deint_id == DEINT_ID_INT4 ||
245 ast->deint_id == DEINT_ID_GENR ||
246 ast->deint_id == DEINT_ID_SIPR) {
247 if (st->codec->block_align <= 0 ||
248 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
249 ast->audio_framesize * sub_packet_h < st->codec->block_align)
250 return AVERROR_INVALIDDATA;
251 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
252 return AVERROR(ENOMEM);
254 switch (ast->deint_id) {
256 if (ast->coded_framesize > ast->audio_framesize ||
258 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
259 return AVERROR_INVALIDDATA;
262 if (ast->sub_packet_size <= 0 ||
263 ast->sub_packet_size > ast->audio_framesize)
264 return AVERROR_INVALIDDATA;
272 av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
273 return AVERROR_INVALIDDATA;
280 rm_read_metadata(s, pb, 0);
287 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
288 AVStream *st, RMStream *rst, int codec_data_size)
295 avpriv_set_pts_info(st, 64, 1, 1000);
296 codec_pos = avio_tell(pb);
298 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
300 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
302 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
303 avio_seek(pb, -4, SEEK_CUR);
304 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
307 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
308 st->codec->codec_tag = AV_RL32(st->codec->extradata);
309 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
310 st->codec->codec_tag);
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_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
322 if (st->codec->codec_id == AV_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->avg_frame_rate.den, &st->avg_frame_rate.num,
336 0x10000, fps, (1 << 30) - 1);
340 /* skip codec info */
341 size = avio_tell(pb) - codec_pos;
342 avio_skip(pb, codec_data_size - size);
347 /** this function assumes that the demuxer has already seeked to the start
348 * of the INDX chunk, and will bail out if not. */
349 static int rm_read_index(AVFormatContext *s)
351 AVIOContext *pb = s->pb;
352 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
356 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
358 size = avio_rb32(pb);
362 n_pkts = avio_rb32(pb);
363 str_id = avio_rb16(pb);
364 next_off = avio_rb32(pb);
365 for (n = 0; n < s->nb_streams; n++)
366 if (s->streams[n]->id == str_id) {
370 if (n == s->nb_streams) {
371 av_log(s, AV_LOG_ERROR,
372 "Invalid stream index %d for index at pos %"PRId64"\n",
373 str_id, avio_tell(pb));
375 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
376 av_log(s, AV_LOG_ERROR,
377 "Nr. of packets in packet index for stream index %d "
378 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
379 str_id, avio_size(pb), avio_tell(pb),
380 (avio_size(pb) - avio_tell(pb)) / 14);
384 for (n = 0; n < n_pkts; n++) {
388 avio_skip(pb, 4); /* packet no. */
390 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
394 if (next_off && avio_tell(pb) < next_off &&
395 avio_seek(pb, next_off, SEEK_SET) < 0) {
396 av_log(s, AV_LOG_ERROR,
397 "Non-linear index detected, not supported\n");
405 static int rm_read_header_old(AVFormatContext *s)
407 RMDemuxContext *rm = s->priv_data;
411 st = avformat_new_stream(s, NULL);
414 st->priv_data = ff_rm_alloc_rmstream();
415 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
418 static int rm_read_header(AVFormatContext *s)
420 RMDemuxContext *rm = s->priv_data;
422 AVIOContext *pb = s->pb;
425 unsigned int start_time, duration;
426 unsigned int data_off = 0, indx_off = 0;
431 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
432 /* very old .ra format */
433 return rm_read_header_old(s);
434 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
438 tag_size = avio_rb32(pb);
439 avio_skip(pb, tag_size - 8);
445 tag_size = avio_rb32(pb);
447 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
454 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
457 case MKTAG('P', 'R', 'O', 'P'):
459 avio_rb32(pb); /* max bit rate */
460 avio_rb32(pb); /* avg bit rate */
461 avio_rb32(pb); /* max packet size */
462 avio_rb32(pb); /* avg packet size */
463 avio_rb32(pb); /* nb packets */
464 avio_rb32(pb); /* duration */
465 avio_rb32(pb); /* preroll */
466 indx_off = avio_rb32(pb); /* index offset */
467 data_off = avio_rb32(pb); /* data offset */
468 avio_rb16(pb); /* nb streams */
469 flags = avio_rb16(pb); /* flags */
471 case MKTAG('C', 'O', 'N', 'T'):
472 rm_read_metadata(s, pb, 1);
474 case MKTAG('M', 'D', 'P', 'R'):
475 st = avformat_new_stream(s, NULL);
477 return AVERROR(ENOMEM);
478 st->id = avio_rb16(pb);
479 avio_rb32(pb); /* max bit rate */
480 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
481 avio_rb32(pb); /* max packet size */
482 avio_rb32(pb); /* avg packet size */
483 start_time = avio_rb32(pb); /* start time */
484 avio_rb32(pb); /* preroll */
485 duration = avio_rb32(pb); /* duration */
486 st->start_time = start_time;
487 st->duration = duration;
488 get_str8(pb, buf, sizeof(buf)); /* desc */
489 get_str8(pb, buf, sizeof(buf)); /* mimetype */
490 st->codec->codec_type = AVMEDIA_TYPE_DATA;
491 st->priv_data = ff_rm_alloc_rmstream();
492 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
496 case MKTAG('D', 'A', 'T', 'A'):
499 /* unknown tag: skip it */
500 avio_skip(pb, tag_size - 10);
505 rm->nb_packets = avio_rb32(pb); /* number of packets */
506 if (!rm->nb_packets && (flags & 4))
507 rm->nb_packets = 3600 * 25;
508 avio_rb32(pb); /* next data header */
511 data_off = avio_tell(pb) - 18;
512 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
513 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
515 avio_seek(pb, data_off + 18, SEEK_SET);
521 static int get_num(AVIOContext *pb, int *len)
533 return (n << 16) | n1;
537 /* multiple of 20 bytes for ra144 (ugly) */
538 #define RAW_PACKET_SIZE 1000
540 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
541 RMDemuxContext *rm = s->priv_data;
542 AVIOContext *pb = s->pb;
544 uint32_t state=0xFFFFFFFF;
546 while(!pb->eof_reached){
548 *pos= avio_tell(pb) - 3;
549 if(rm->remaining_len > 0){
550 num= rm->current_stream;
551 len= rm->remaining_len;
552 *timestamp = AV_NOPTS_VALUE;
555 state= (state<<8) + avio_r8(pb);
557 if(state == MKBETAG('I', 'N', 'D', 'X')){
558 int n_pkts, expected_len;
561 n_pkts = avio_rb32(pb);
562 expected_len = 20 + n_pkts * 14;
564 /* some files don't add index entries to chunk size... */
566 else if (len != expected_len)
567 av_log(s, AV_LOG_WARNING,
568 "Index size %d (%d pkts) is wrong, should be %d.\n",
569 len, n_pkts, expected_len);
570 len -= 14; // we already read part of the index header
574 } else if (state == MKBETAG('D','A','T','A')) {
575 av_log(s, AV_LOG_WARNING,
576 "DATA tag in middle of chunk, file may be broken.\n");
579 if(state > (unsigned)0xFFFF || state <= 12)
585 *timestamp = avio_rb32(pb);
586 avio_r8(pb); /* reserved */
587 *flags = avio_r8(pb); /* flags */
589 for(i=0;i<s->nb_streams;i++) {
594 if (i == s->nb_streams) {
596 /* skip packet if unknown number */
598 rm->remaining_len = 0;
608 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
609 RMDemuxContext *rm, RMStream *vst,
610 AVPacket *pkt, int len, int *pseq,
613 int hdr, seq, pic_num, len2, pos;
616 hdr = avio_r8(pb); len--;
619 if(type != 3){ // not frame as a part of packet
620 seq = avio_r8(pb); len--;
622 if(type != 1){ // not whole frame
623 len2 = get_num(pb, &len);
624 pos = get_num(pb, &len);
625 pic_num = avio_r8(pb); len--;
629 rm->remaining_len = len;
630 if(type&1){ // frame, not slice
631 if(type == 3){ // frame as a part of packet
635 if(rm->remaining_len < len)
637 rm->remaining_len -= len;
638 if(av_new_packet(pkt, len + 9) < 0)
641 AV_WL32(pkt->data + 1, 1);
642 AV_WL32(pkt->data + 5, 0);
643 avio_read(pb, pkt->data + 9, len);
646 //now we have to deal with single slice
649 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
650 vst->slices = ((hdr & 0x3F) << 1) + 1;
651 vst->videobufsize = len2 + 8*vst->slices + 1;
652 av_free_packet(&vst->pkt); //FIXME this should be output.
653 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
654 return AVERROR(ENOMEM);
655 vst->videobufpos = 8*vst->slices + 1;
657 vst->curpic_num = pic_num;
658 vst->pktpos = avio_tell(pb);
661 len = FFMIN(len, pos);
663 if(++vst->cur_slice > vst->slices)
665 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
666 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
667 if(vst->videobufpos + len > vst->videobufsize)
669 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
671 vst->videobufpos += len;
672 rm->remaining_len-= len;
674 if (type == 2 || vst->videobufpos == vst->videobufsize) {
675 vst->pkt.data[0] = vst->cur_slice-1;
680 #if FF_API_DESTRUCT_PACKET
681 FF_DISABLE_DEPRECATION_WARNINGS
682 vst->pkt.destruct = NULL;
683 FF_ENABLE_DEPRECATION_WARNINGS
685 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
686 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
687 vst->videobufpos - 1 - 8*vst->slices);
688 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
689 pkt->pts = AV_NOPTS_VALUE;
690 pkt->pos = vst->pktpos;
699 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
704 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
706 for (j=0;j<pkt->size;j+=2) {
707 FFSWAP(int, ptr[0], ptr[1]);
714 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
715 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
716 int *seq, int flags, int64_t timestamp)
718 RMDemuxContext *rm = s->priv_data;
720 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
721 rm->current_stream= st->id;
722 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
723 return -1; //got partial frame
724 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
725 if ((ast->deint_id == DEINT_ID_GENR) ||
726 (ast->deint_id == DEINT_ID_INT4) ||
727 (ast->deint_id == DEINT_ID_SIPR)) {
729 int sps = ast->sub_packet_size;
730 int cfs = ast->coded_framesize;
731 int h = ast->sub_packet_h;
732 int y = ast->sub_packet_cnt;
733 int w = ast->audio_framesize;
736 y = ast->sub_packet_cnt = 0;
738 ast->audiotimestamp = timestamp;
740 switch (ast->deint_id) {
742 for (x = 0; x < h/2; x++)
743 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
746 for (x = 0; x < w/sps; x++)
747 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
750 avio_read(pb, ast->pkt.data + y * w, w);
754 if (++(ast->sub_packet_cnt) < h)
756 if (ast->deint_id == DEINT_ID_SIPR)
757 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
759 ast->sub_packet_cnt = 0;
760 rm->audio_stream_num = st->index;
761 rm->audio_pkt_cnt = h * w / st->codec->block_align;
762 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
763 (ast->deint_id == DEINT_ID_VBRS)) {
765 rm->audio_stream_num = st->index;
766 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
767 if (ast->sub_packet_cnt) {
768 for (x = 0; x < ast->sub_packet_cnt; x++)
769 ast->sub_packet_lengths[x] = avio_rb16(pb);
770 rm->audio_pkt_cnt = ast->sub_packet_cnt;
771 ast->audiotimestamp = timestamp;
775 av_get_packet(pb, pkt, len);
776 rm_ac3_swap_bytes(st, pkt);
779 av_get_packet(pb, pkt, len);
781 pkt->stream_index = st->index;
784 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
785 if(st->codec->codec_id == AV_CODEC_ID_RV20){
786 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
787 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
789 seq |= (timestamp&~0x3FFF);
790 if(seq - timestamp > 0x2000) seq -= 0x4000;
791 if(seq - timestamp < -0x2000) seq += 0x4000;
796 pkt->pts = timestamp;
798 pkt->flags |= AV_PKT_FLAG_KEY;
800 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
804 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
805 AVStream *st, RMStream *ast, AVPacket *pkt)
807 RMDemuxContext *rm = s->priv_data;
809 assert (rm->audio_pkt_cnt > 0);
811 if (ast->deint_id == DEINT_ID_VBRF ||
812 ast->deint_id == DEINT_ID_VBRS)
813 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
815 av_new_packet(pkt, st->codec->block_align);
816 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
817 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
818 st->codec->block_align);
821 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
822 ast->audiotimestamp = AV_NOPTS_VALUE;
823 pkt->flags = AV_PKT_FLAG_KEY;
826 pkt->stream_index = st->index;
828 return rm->audio_pkt_cnt;
831 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
833 RMDemuxContext *rm = s->priv_data;
835 int i, len, res, seq = 1;
836 int64_t timestamp, pos;
840 if (rm->audio_pkt_cnt) {
841 // If there are queued audio packet return them first
842 st = s->streams[rm->audio_stream_num];
843 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
846 if (rm->old_format) {
851 timestamp = AV_NOPTS_VALUE;
852 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
853 ast->coded_framesize * ast->sub_packet_h / 2;
854 flags = (seq++ == 1) ? 2 : 0;
855 pos = avio_tell(s->pb);
857 len=sync(s, ×tamp, &flags, &i, &pos);
862 if(len<0 || s->pb->eof_reached)
865 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
866 &seq, flags, timestamp);
867 if((flags&2) && (seq&0x7F) == 1)
868 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
873 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
874 || st->discard >= AVDISCARD_ALL){
883 static int rm_read_close(AVFormatContext *s)
887 for (i=0;i<s->nb_streams;i++)
888 ff_rm_free_rmstream(s->streams[i]->priv_data);
893 static int rm_probe(AVProbeData *p)
895 /* check file header */
896 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
897 p->buf[2] == 'M' && p->buf[3] == 'F' &&
898 p->buf[4] == 0 && p->buf[5] == 0) ||
899 (p->buf[0] == '.' && p->buf[1] == 'r' &&
900 p->buf[2] == 'a' && p->buf[3] == 0xfd))
901 return AVPROBE_SCORE_MAX;
906 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
907 int64_t *ppos, int64_t pos_limit)
909 RMDemuxContext *rm = s->priv_data;
911 int stream_index2, flags, len, h;
916 return AV_NOPTS_VALUE;
918 avio_seek(s->pb, pos, SEEK_SET);
924 len=sync(s, &dts, &flags, &stream_index2, &pos);
926 return AV_NOPTS_VALUE;
928 st = s->streams[stream_index2];
929 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
930 h= avio_r8(s->pb); len--;
932 seq = avio_r8(s->pb); len--;
936 if((flags&2) && (seq&0x7F) == 1){
937 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
938 flags, stream_index2, stream_index, dts, seq);
939 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
940 if(stream_index2 == stream_index)
944 avio_skip(s->pb, len);
950 AVInputFormat ff_rm_demuxer = {
952 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
953 .priv_data_size = sizeof(RMDemuxContext),
954 .read_probe = rm_probe,
955 .read_header = rm_read_header,
956 .read_packet = rm_read_packet,
957 .read_close = rm_read_close,
958 .read_timestamp = rm_read_dts,
961 AVInputFormat ff_rdt_demuxer = {
963 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
964 .priv_data_size = sizeof(RMDemuxContext),
965 .read_close = rm_read_close,
966 .flags = AVFMT_NOFILE,