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/avassert.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/channel_layout.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/dict.h"
33 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac
34 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
35 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
36 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
37 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
38 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
41 AVPacket pkt; ///< place to store merged video frame / reordered audio data
42 int videobufsize; ///< current assembled frame size
43 int videobufpos; ///< position for the next slice in the video buffer
44 int curpic_num; ///< picture number of current frame
45 int cur_slice, slices;
46 int64_t pktpos; ///< first slice position in file
47 /// Audio descrambling matrix parameters
48 int64_t audiotimestamp; ///< Audio packet timestamp
49 int sub_packet_cnt; // Subpacket counter, used while reading
50 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
51 int audio_framesize; /// Audio frame size from container
52 int sub_packet_lengths[16]; /// Length of each subpacket
53 int32_t deint_id; ///< deinterleaver used in audio stream
61 int audio_stream_num; ///< Stream number for audio packets
62 int audio_pkt_cnt; ///< Output packet counter
65 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
76 if (buf_size > 0) *q = '\0';
79 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
81 get_strl(pb, buf, buf_size, avio_r8(pb));
84 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
88 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
89 if (!avctx->extradata)
90 return AVERROR(ENOMEM);
91 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
92 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
93 if (avctx->extradata_size != size)
98 static void rm_read_metadata(AVFormatContext *s, int wide)
102 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
103 int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb);
104 get_strl(s->pb, buf, sizeof(buf), len);
105 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
109 RMStream *ff_rm_alloc_rmstream (void)
111 RMStream *rms = av_mallocz(sizeof(RMStream));
112 rms->curpic_num = -1;
116 void ff_rm_free_rmstream (RMStream *rms)
118 av_free_packet(&rms->pkt);
121 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
122 AVStream *st, RMStream *ast, int read_all)
129 version = avio_rb16(pb); /* version */
131 int header_size = avio_rb16(pb);
132 int64_t startpos = avio_tell(pb);
134 rm_read_metadata(s, 0);
135 if ((startpos + header_size) >= avio_tell(pb) + 2) {
136 // fourcc (should always be "lpcJ")
138 get_str8(pb, buf, sizeof(buf));
140 // Skip extra header crap (this should never happen)
141 if ((startpos + header_size) > avio_tell(pb))
142 avio_skip(pb, header_size + startpos - avio_tell(pb));
143 st->codec->sample_rate = 8000;
144 st->codec->channels = 1;
145 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
146 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
147 st->codec->codec_id = AV_CODEC_ID_RA_144;
148 ast->deint_id = DEINT_ID_INT0;
150 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
151 int codecdata_length;
152 /* old version (4) */
153 avio_skip(pb, 2); /* unused */
154 avio_rb32(pb); /* .ra4 */
155 avio_rb32(pb); /* data size */
156 avio_rb16(pb); /* version2 */
157 avio_rb32(pb); /* header size */
158 flavor= avio_rb16(pb); /* add codec info / flavor */
159 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
160 avio_rb32(pb); /* ??? */
161 avio_rb32(pb); /* ??? */
162 avio_rb32(pb); /* ??? */
163 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
164 st->codec->block_align= avio_rb16(pb); /* frame size */
165 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
166 avio_rb16(pb); /* ??? */
168 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
170 st->codec->sample_rate = avio_rb16(pb);
172 st->codec->channels = avio_rb16(pb);
174 ast->deint_id = avio_rl32(pb);
175 avio_read(pb, buf, 4);
178 get_str8(pb, buf, sizeof(buf)); /* desc */
179 ast->deint_id = AV_RL32(buf);
180 get_str8(pb, buf, sizeof(buf)); /* desc */
182 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
183 st->codec->codec_tag = AV_RL32(buf);
184 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
185 st->codec->codec_tag);
187 switch (st->codec->codec_id) {
188 case AV_CODEC_ID_AC3:
189 st->need_parsing = AVSTREAM_PARSE_FULL;
191 case AV_CODEC_ID_RA_288:
192 st->codec->extradata_size= 0;
193 ast->audio_framesize = st->codec->block_align;
194 st->codec->block_align = coded_framesize;
196 case AV_CODEC_ID_COOK:
197 st->need_parsing = AVSTREAM_PARSE_HEADERS;
198 case AV_CODEC_ID_ATRAC3:
199 case AV_CODEC_ID_SIPR:
200 avio_rb16(pb); avio_r8(pb);
203 codecdata_length = avio_rb32(pb);
204 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
205 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
209 ast->audio_framesize = st->codec->block_align;
210 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
212 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
216 st->codec->block_align = ff_sipr_subpk_size[flavor];
218 if(sub_packet_size <= 0){
219 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
222 st->codec->block_align = ast->sub_packet_size;
224 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
228 case AV_CODEC_ID_AAC:
229 avio_rb16(pb); avio_r8(pb);
232 codecdata_length = avio_rb32(pb);
233 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
234 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
237 if (codecdata_length >= 1) {
239 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
244 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
246 if (ast->deint_id == DEINT_ID_INT4 ||
247 ast->deint_id == DEINT_ID_GENR ||
248 ast->deint_id == DEINT_ID_SIPR) {
249 if (st->codec->block_align <= 0 ||
250 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
251 ast->audio_framesize * sub_packet_h < st->codec->block_align)
252 return AVERROR_INVALIDDATA;
253 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
254 return AVERROR(ENOMEM);
256 switch (ast->deint_id) {
258 if (ast->coded_framesize > ast->audio_framesize ||
260 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
261 return AVERROR_INVALIDDATA;
264 if (ast->sub_packet_size <= 0 ||
265 ast->sub_packet_size > ast->audio_framesize)
266 return AVERROR_INVALIDDATA;
274 av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
275 return AVERROR_INVALIDDATA;
282 rm_read_metadata(s, 0);
289 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
290 AVStream *st, RMStream *rst, int codec_data_size, const uint8_t *mime)
297 avpriv_set_pts_info(st, 64, 1, 1000);
298 codec_pos = avio_tell(pb);
300 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
302 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
304 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
305 avio_seek(pb, -4, SEEK_CUR);
306 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
309 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
310 st->codec->codec_tag = AV_RL32(st->codec->extradata);
311 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
312 st->codec->codec_tag);
313 } else if(mime && !strcmp(mime, "logical-fileinfo")){
314 int stream_count, rule_count, property_count, i;
315 ff_free_stream(s, st);
316 if (avio_rb16(pb) != 0) {
317 av_log(s, AV_LOG_WARNING, "Unsupported version\n");
320 stream_count = avio_rb16(pb);
321 avio_skip(pb, 6*stream_count);
322 rule_count = avio_rb16(pb);
323 avio_skip(pb, 2*rule_count);
324 property_count = avio_rb16(pb);
325 for(i=0; i<property_count; i++){
326 uint8_t name[128], val[128];
328 if (avio_rb16(pb) != 0) {
329 av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
330 goto skip; //FIXME skip just this one
332 get_str8(pb, name, sizeof(name));
333 switch(avio_rb32(pb)) {
334 case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
335 av_dict_set(&s->metadata, name, val, 0);
337 default: avio_skip(pb, avio_rb16(pb));
342 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
344 av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
347 st->codec->codec_tag = avio_rl32(pb);
348 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
349 st->codec->codec_tag);
350 av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
351 if (st->codec->codec_id == AV_CODEC_ID_NONE)
353 st->codec->width = avio_rb16(pb);
354 st->codec->height = avio_rb16(pb);
355 avio_skip(pb, 2); // looks like bits per sample
356 avio_skip(pb, 4); // always zero?
357 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
358 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
361 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
364 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
365 0x10000, fps, (1 << 30) - 1);
366 #if FF_API_R_FRAME_RATE
367 st->r_frame_rate = st->avg_frame_rate;
372 /* skip codec info */
373 size = avio_tell(pb) - codec_pos;
374 avio_skip(pb, codec_data_size - size);
379 /** this function assumes that the demuxer has already seeked to the start
380 * of the INDX chunk, and will bail out if not. */
381 static int rm_read_index(AVFormatContext *s)
383 AVIOContext *pb = s->pb;
384 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
388 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
390 size = avio_rb32(pb);
394 n_pkts = avio_rb32(pb);
395 str_id = avio_rb16(pb);
396 next_off = avio_rb32(pb);
397 for (n = 0; n < s->nb_streams; n++)
398 if (s->streams[n]->id == str_id) {
402 if (n == s->nb_streams) {
403 av_log(s, AV_LOG_ERROR,
404 "Invalid stream index %d for index at pos %"PRId64"\n",
405 str_id, avio_tell(pb));
407 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
408 av_log(s, AV_LOG_ERROR,
409 "Nr. of packets in packet index for stream index %d "
410 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
411 str_id, avio_size(pb), avio_tell(pb),
412 (avio_size(pb) - avio_tell(pb)) / 14);
416 for (n = 0; n < n_pkts; n++) {
420 avio_skip(pb, 4); /* packet no. */
422 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
426 if (next_off && avio_tell(pb) < next_off &&
427 avio_seek(pb, next_off, SEEK_SET) < 0) {
428 av_log(s, AV_LOG_ERROR,
429 "Non-linear index detected, not supported\n");
437 static int rm_read_header_old(AVFormatContext *s)
439 RMDemuxContext *rm = s->priv_data;
443 st = avformat_new_stream(s, NULL);
446 st->priv_data = ff_rm_alloc_rmstream();
447 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
450 static int rm_read_header(AVFormatContext *s)
452 RMDemuxContext *rm = s->priv_data;
454 AVIOContext *pb = s->pb;
457 unsigned int start_time, duration;
458 unsigned int data_off = 0, indx_off = 0;
459 char buf[128], mime[128];
463 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
464 /* very old .ra format */
465 return rm_read_header_old(s);
466 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
470 tag_size = avio_rb32(pb);
471 avio_skip(pb, tag_size - 8);
477 tag_size = avio_rb32(pb);
479 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
486 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
489 case MKTAG('P', 'R', 'O', 'P'):
491 avio_rb32(pb); /* max bit rate */
492 avio_rb32(pb); /* avg bit rate */
493 avio_rb32(pb); /* max packet size */
494 avio_rb32(pb); /* avg packet size */
495 avio_rb32(pb); /* nb packets */
496 duration = avio_rb32(pb); /* duration */
497 s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
498 avio_rb32(pb); /* preroll */
499 indx_off = avio_rb32(pb); /* index offset */
500 data_off = avio_rb32(pb); /* data offset */
501 avio_rb16(pb); /* nb streams */
502 flags = avio_rb16(pb); /* flags */
504 case MKTAG('C', 'O', 'N', 'T'):
505 rm_read_metadata(s, 1);
507 case MKTAG('M', 'D', 'P', 'R'):
508 st = avformat_new_stream(s, NULL);
510 return AVERROR(ENOMEM);
511 st->id = avio_rb16(pb);
512 avio_rb32(pb); /* max bit rate */
513 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
514 avio_rb32(pb); /* max packet size */
515 avio_rb32(pb); /* avg packet size */
516 start_time = avio_rb32(pb); /* start time */
517 avio_rb32(pb); /* preroll */
518 duration = avio_rb32(pb); /* duration */
519 st->start_time = start_time;
520 st->duration = duration;
522 s->duration = AV_NOPTS_VALUE;
523 get_str8(pb, buf, sizeof(buf)); /* desc */
524 get_str8(pb, mime, sizeof(mime)); /* mimetype */
525 st->codec->codec_type = AVMEDIA_TYPE_DATA;
526 st->priv_data = ff_rm_alloc_rmstream();
527 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
528 avio_rb32(pb), mime) < 0)
531 case MKTAG('D', 'A', 'T', 'A'):
534 /* unknown tag: skip it */
535 avio_skip(pb, tag_size - 10);
540 rm->nb_packets = avio_rb32(pb); /* number of packets */
541 if (!rm->nb_packets && (flags & 4))
542 rm->nb_packets = 3600 * 25;
543 avio_rb32(pb); /* next data header */
546 data_off = avio_tell(pb) - 18;
547 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
548 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
550 avio_seek(pb, data_off + 18, SEEK_SET);
556 static int get_num(AVIOContext *pb, int *len)
568 return (n << 16) | n1;
572 /* multiple of 20 bytes for ra144 (ugly) */
573 #define RAW_PACKET_SIZE 1000
575 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
576 RMDemuxContext *rm = s->priv_data;
577 AVIOContext *pb = s->pb;
579 uint32_t state=0xFFFFFFFF;
581 while(!url_feof(pb)){
583 *pos= avio_tell(pb) - 3;
584 if(rm->remaining_len > 0){
585 num= rm->current_stream;
586 len= rm->remaining_len;
587 *timestamp = AV_NOPTS_VALUE;
590 state= (state<<8) + avio_r8(pb);
592 if(state == MKBETAG('I', 'N', 'D', 'X')){
593 int n_pkts, expected_len;
596 n_pkts = avio_rb32(pb);
597 expected_len = 20 + n_pkts * 14;
599 /* some files don't add index entries to chunk size... */
601 else if (len != expected_len)
602 av_log(s, AV_LOG_WARNING,
603 "Index size %d (%d pkts) is wrong, should be %d.\n",
604 len, n_pkts, expected_len);
605 len -= 14; // we already read part of the index header
609 } else if (state == MKBETAG('D','A','T','A')) {
610 av_log(s, AV_LOG_WARNING,
611 "DATA tag in middle of chunk, file may be broken.\n");
614 if(state > (unsigned)0xFFFF || state <= 12)
620 *timestamp = avio_rb32(pb);
621 avio_r8(pb); /* reserved */
622 *flags = avio_r8(pb); /* flags */
624 for(i=0;i<s->nb_streams;i++) {
629 if (i == s->nb_streams) {
631 /* skip packet if unknown number */
633 rm->remaining_len = 0;
643 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
644 RMDemuxContext *rm, RMStream *vst,
645 AVPacket *pkt, int len, int *pseq,
648 int hdr, seq, pic_num, len2, pos;
651 hdr = avio_r8(pb); len--;
654 if(type != 3){ // not frame as a part of packet
655 seq = avio_r8(pb); len--;
657 if(type != 1){ // not whole frame
658 len2 = get_num(pb, &len);
659 pos = get_num(pb, &len);
660 pic_num = avio_r8(pb); len--;
664 rm->remaining_len = len;
665 if(type&1){ // frame, not slice
666 if(type == 3){ // frame as a part of packet
670 if(rm->remaining_len < len)
672 rm->remaining_len -= len;
673 if(av_new_packet(pkt, len + 9) < 0)
676 AV_WL32(pkt->data + 1, 1);
677 AV_WL32(pkt->data + 5, 0);
678 avio_read(pb, pkt->data + 9, len);
681 //now we have to deal with single slice
684 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
685 vst->slices = ((hdr & 0x3F) << 1) + 1;
686 vst->videobufsize = len2 + 8*vst->slices + 1;
687 av_free_packet(&vst->pkt); //FIXME this should be output.
688 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
689 return AVERROR(ENOMEM);
690 vst->videobufpos = 8*vst->slices + 1;
692 vst->curpic_num = pic_num;
693 vst->pktpos = avio_tell(pb);
696 len = FFMIN(len, pos);
698 if(++vst->cur_slice > vst->slices)
700 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
701 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
702 if(vst->videobufpos + len > vst->videobufsize)
704 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
706 vst->videobufpos += len;
707 rm->remaining_len-= len;
709 if (type == 2 || vst->videobufpos == vst->videobufsize) {
710 vst->pkt.data[0] = vst->cur_slice-1;
714 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
715 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
716 vst->videobufpos - 1 - 8*vst->slices);
717 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
718 pkt->pts = AV_NOPTS_VALUE;
719 pkt->pos = vst->pktpos;
728 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
733 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
735 for (j=0;j<pkt->size;j+=2) {
736 FFSWAP(int, ptr[0], ptr[1]);
743 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
744 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
745 int *seq, int flags, int64_t timestamp)
747 RMDemuxContext *rm = s->priv_data;
749 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
750 rm->current_stream= st->id;
751 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
752 return -1; //got partial frame
753 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
754 if ((ast->deint_id == DEINT_ID_GENR) ||
755 (ast->deint_id == DEINT_ID_INT4) ||
756 (ast->deint_id == DEINT_ID_SIPR)) {
758 int sps = ast->sub_packet_size;
759 int cfs = ast->coded_framesize;
760 int h = ast->sub_packet_h;
761 int y = ast->sub_packet_cnt;
762 int w = ast->audio_framesize;
765 y = ast->sub_packet_cnt = 0;
767 ast->audiotimestamp = timestamp;
769 switch (ast->deint_id) {
771 for (x = 0; x < h/2; x++)
772 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
775 for (x = 0; x < w/sps; x++)
776 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
779 avio_read(pb, ast->pkt.data + y * w, w);
783 if (++(ast->sub_packet_cnt) < h)
785 if (ast->deint_id == DEINT_ID_SIPR)
786 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
788 ast->sub_packet_cnt = 0;
789 rm->audio_stream_num = st->index;
790 rm->audio_pkt_cnt = h * w / st->codec->block_align;
791 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
792 (ast->deint_id == DEINT_ID_VBRS)) {
794 rm->audio_stream_num = st->index;
795 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
796 if (ast->sub_packet_cnt) {
797 for (x = 0; x < ast->sub_packet_cnt; x++)
798 ast->sub_packet_lengths[x] = avio_rb16(pb);
799 rm->audio_pkt_cnt = ast->sub_packet_cnt;
800 ast->audiotimestamp = timestamp;
804 av_get_packet(pb, pkt, len);
805 rm_ac3_swap_bytes(st, pkt);
808 av_get_packet(pb, pkt, len);
810 pkt->stream_index = st->index;
813 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
814 if(st->codec->codec_id == AV_CODEC_ID_RV20){
815 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
816 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
818 seq |= (timestamp&~0x3FFF);
819 if(seq - timestamp > 0x2000) seq -= 0x4000;
820 if(seq - timestamp < -0x2000) seq += 0x4000;
825 pkt->pts = timestamp;
827 pkt->flags |= AV_PKT_FLAG_KEY;
829 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
833 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
834 AVStream *st, RMStream *ast, AVPacket *pkt)
836 RMDemuxContext *rm = s->priv_data;
838 av_assert0 (rm->audio_pkt_cnt > 0);
840 if (ast->deint_id == DEINT_ID_VBRF ||
841 ast->deint_id == DEINT_ID_VBRS)
842 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
844 if(av_new_packet(pkt, st->codec->block_align) < 0)
845 return AVERROR(ENOMEM);
846 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
847 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
848 st->codec->block_align);
851 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
852 ast->audiotimestamp = AV_NOPTS_VALUE;
853 pkt->flags = AV_PKT_FLAG_KEY;
856 pkt->stream_index = st->index;
858 return rm->audio_pkt_cnt;
861 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
863 RMDemuxContext *rm = s->priv_data;
865 int i, len, res, seq = 1;
866 int64_t timestamp, pos;
870 if (rm->audio_pkt_cnt) {
871 // If there are queued audio packet return them first
872 st = s->streams[rm->audio_stream_num];
873 res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
878 if (rm->old_format) {
883 timestamp = AV_NOPTS_VALUE;
884 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
885 ast->coded_framesize * ast->sub_packet_h / 2;
886 flags = (seq++ == 1) ? 2 : 0;
887 pos = avio_tell(s->pb);
889 len=sync(s, ×tamp, &flags, &i, &pos);
894 if(len<0 || url_feof(s->pb))
897 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
898 &seq, flags, timestamp);
899 if((flags&2) && (seq&0x7F) == 1)
900 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
905 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
906 || st->discard >= AVDISCARD_ALL){
915 static int rm_read_close(AVFormatContext *s)
919 for (i=0;i<s->nb_streams;i++)
920 ff_rm_free_rmstream(s->streams[i]->priv_data);
925 static int rm_probe(AVProbeData *p)
927 /* check file header */
928 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
929 p->buf[2] == 'M' && p->buf[3] == 'F' &&
930 p->buf[4] == 0 && p->buf[5] == 0) ||
931 (p->buf[0] == '.' && p->buf[1] == 'r' &&
932 p->buf[2] == 'a' && p->buf[3] == 0xfd))
933 return AVPROBE_SCORE_MAX;
938 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
939 int64_t *ppos, int64_t pos_limit)
941 RMDemuxContext *rm = s->priv_data;
943 int stream_index2, flags, len, h;
948 return AV_NOPTS_VALUE;
950 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
951 return AV_NOPTS_VALUE;
958 len=sync(s, &dts, &flags, &stream_index2, &pos);
960 return AV_NOPTS_VALUE;
962 st = s->streams[stream_index2];
963 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
964 h= avio_r8(s->pb); len--;
966 seq = avio_r8(s->pb); len--;
970 if((flags&2) && (seq&0x7F) == 1){
971 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
972 flags, stream_index2, stream_index, dts, seq);
973 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
974 if(stream_index2 == stream_index)
978 avio_skip(s->pb, len);
984 AVInputFormat ff_rm_demuxer = {
986 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
987 .priv_data_size = sizeof(RMDemuxContext),
988 .read_probe = rm_probe,
989 .read_header = rm_read_header,
990 .read_packet = rm_read_packet,
991 .read_close = rm_read_close,
992 .read_timestamp = rm_read_dts,
995 AVInputFormat ff_rdt_demuxer = {
997 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
998 .priv_data_size = sizeof(RMDemuxContext),
999 .read_close = rm_read_close,
1000 .flags = AVFMT_NOFILE,