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
24 #include "libavutil/avstring.h"
25 #include "libavutil/channel_layout.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/dict.h"
34 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/ATRAC
35 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
36 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
37 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
38 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
39 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
42 AVPacket pkt; ///< place to store merged video frame / reordered audio data
43 int videobufsize; ///< current assembled frame size
44 int videobufpos; ///< position for the next slice in the video buffer
45 int curpic_num; ///< picture number of current frame
46 int cur_slice, slices;
47 int64_t pktpos; ///< first slice position in file
48 /// Audio descrambling matrix parameters
49 int64_t audiotimestamp; ///< Audio packet timestamp
50 int sub_packet_cnt; // Subpacket counter, used while reading
51 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
52 int audio_framesize; /// Audio frame size from container
53 int sub_packet_lengths[16]; /// Length of each subpacket
54 int32_t deint_id; ///< deinterleaver used in audio stream
57 typedef struct RMDemuxContext {
62 int audio_stream_num; ///< Stream number for audio packets
63 int audio_pkt_cnt; ///< Output packet counter
66 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
77 if (buf_size > 0) *q = '\0';
80 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
82 get_strl(pb, buf, buf_size, avio_r8(pb));
85 static int rm_read_extradata(AVIOContext *pb, AVCodecParameters *par, unsigned size)
89 par->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
91 return AVERROR(ENOMEM);
92 par->extradata_size = avio_read(pb, par->extradata, size);
93 if (par->extradata_size != size)
98 static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
102 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
103 int len = wide ? avio_rb16(pb) : avio_r8(pb);
104 get_strl(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));
114 rms->curpic_num = -1;
118 void ff_rm_free_rmstream (RMStream *rms)
120 av_packet_unref(&rms->pkt);
123 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
124 AVStream *st, RMStream *ast, int read_all)
131 version = avio_rb16(pb); /* version */
133 int header_size = avio_rb16(pb);
134 int64_t startpos = avio_tell(pb);
136 rm_read_metadata(s, pb, 0);
137 if ((startpos + header_size) >= avio_tell(pb) + 2) {
138 // fourcc (should always be "lpcJ")
140 get_str8(pb, buf, sizeof(buf));
142 // Skip extra header crap (this should never happen)
143 if ((startpos + header_size) > avio_tell(pb))
144 avio_skip(pb, header_size + startpos - avio_tell(pb));
145 st->codecpar->sample_rate = 8000;
146 st->codecpar->channels = 1;
147 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
148 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
149 st->codecpar->codec_id = AV_CODEC_ID_RA_144;
150 ast->deint_id = DEINT_ID_INT0;
152 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
153 int codecdata_length;
154 /* old version (4) */
155 avio_skip(pb, 2); /* unused */
156 avio_rb32(pb); /* .ra4 */
157 avio_rb32(pb); /* data size */
158 avio_rb16(pb); /* version2 */
159 avio_rb32(pb); /* header size */
160 flavor= avio_rb16(pb); /* add codec info / flavor */
161 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
162 avio_rb32(pb); /* ??? */
163 avio_rb32(pb); /* ??? */
164 avio_rb32(pb); /* ??? */
165 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
166 st->codecpar->block_align= avio_rb16(pb); /* frame size */
167 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
168 avio_rb16(pb); /* ??? */
170 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
172 st->codecpar->sample_rate = avio_rb16(pb);
174 st->codecpar->channels = avio_rb16(pb);
176 ast->deint_id = avio_rl32(pb);
177 avio_read(pb, buf, 4);
180 get_str8(pb, buf, sizeof(buf)); /* desc */
181 ast->deint_id = AV_RL32(buf);
182 get_str8(pb, buf, sizeof(buf)); /* desc */
184 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
185 st->codecpar->codec_tag = AV_RL32(buf);
186 st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
187 st->codecpar->codec_tag);
189 switch (st->codecpar->codec_id) {
190 case AV_CODEC_ID_AC3:
191 st->need_parsing = AVSTREAM_PARSE_FULL;
193 case AV_CODEC_ID_RA_288:
194 st->codecpar->extradata_size= 0;
195 ast->audio_framesize = st->codecpar->block_align;
196 st->codecpar->block_align = coded_framesize;
198 case AV_CODEC_ID_COOK:
199 st->need_parsing = AVSTREAM_PARSE_HEADERS;
200 case AV_CODEC_ID_ATRAC3:
201 case AV_CODEC_ID_SIPR:
202 avio_rb16(pb); avio_r8(pb);
205 codecdata_length = avio_rb32(pb);
206 if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
207 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
211 ast->audio_framesize = st->codecpar->block_align;
212 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
214 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
218 st->codecpar->block_align = ff_sipr_subpk_size[flavor];
220 if(sub_packet_size <= 0){
221 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
224 st->codecpar->block_align = ast->sub_packet_size;
226 if ((ret = rm_read_extradata(pb, st->codecpar, codecdata_length)) < 0)
229 case AV_CODEC_ID_AAC:
230 avio_rb16(pb); avio_r8(pb);
233 codecdata_length = avio_rb32(pb);
234 if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
235 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
238 if (codecdata_length >= 1) {
240 if ((ret = rm_read_extradata(pb, st->codecpar, codecdata_length - 1)) < 0)
245 if (ast->deint_id == DEINT_ID_INT4 ||
246 ast->deint_id == DEINT_ID_GENR ||
247 ast->deint_id == DEINT_ID_SIPR) {
248 if (st->codecpar->block_align <= 0 ||
249 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
250 ast->audio_framesize * sub_packet_h < st->codecpar->block_align)
251 return AVERROR_INVALIDDATA;
252 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
253 return AVERROR(ENOMEM);
255 switch (ast->deint_id) {
257 if (ast->coded_framesize > ast->audio_framesize ||
259 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
260 return AVERROR_INVALIDDATA;
263 if (ast->sub_packet_size <= 0 ||
264 ast->sub_packet_size > ast->audio_framesize)
265 return AVERROR_INVALIDDATA;
273 av_log(NULL, 0 ,"Unknown interleaver %"PRIX32"\n", ast->deint_id);
274 return AVERROR_INVALIDDATA;
281 rm_read_metadata(s, pb, 0);
287 int ff_rm_read_mdpr_codecdata(AVFormatContext *s, AVIOContext *pb,
288 AVStream *st, RMStream *rst,
289 unsigned int codec_data_size)
296 avpriv_set_pts_info(st, 64, 1, 1000);
297 codec_pos = avio_tell(pb);
299 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
301 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
303 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
304 avio_seek(pb, -4, SEEK_CUR);
305 if ((ret = rm_read_extradata(pb, st->codecpar, codec_data_size)) < 0)
308 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
309 st->codecpar->codec_tag = AV_RL32(st->codecpar->extradata);
310 st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
311 st->codecpar->codec_tag);
314 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
316 av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
319 st->codecpar->codec_tag = avio_rl32(pb);
320 st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
321 st->codecpar->codec_tag);
322 av_log(s, AV_LOG_TRACE, "%"PRIX32" %X\n", st->codecpar->codec_tag, MKTAG('R', 'V', '2', '0'));
323 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
325 st->codecpar->width = avio_rb16(pb);
326 st->codecpar->height = avio_rb16(pb);
327 avio_skip(pb, 2); // looks like bits per sample
328 avio_skip(pb, 4); // always zero?
329 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
330 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
333 if ((ret = rm_read_extradata(pb, st->codecpar, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
337 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
338 0x10000, fps, (1 << 30) - 1);
339 } else if (s->error_recognition & AV_EF_EXPLODE) {
340 av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
341 return AVERROR_INVALIDDATA;
346 /* skip codec info */
347 size = avio_tell(pb) - codec_pos;
348 avio_skip(pb, codec_data_size - size);
353 /** this function assumes that the demuxer has already seeked to the start
354 * of the INDX chunk, and will bail out if not. */
355 static int rm_read_index(AVFormatContext *s)
357 AVIOContext *pb = s->pb;
358 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
362 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
364 size = avio_rb32(pb);
368 n_pkts = avio_rb32(pb);
369 str_id = avio_rb16(pb);
370 next_off = avio_rb32(pb);
371 for (n = 0; n < s->nb_streams; n++)
372 if (s->streams[n]->id == str_id) {
376 if (n == s->nb_streams) {
377 av_log(s, AV_LOG_ERROR,
378 "Invalid stream index %d for index at pos %"PRId64"\n",
379 str_id, avio_tell(pb));
381 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
382 av_log(s, AV_LOG_ERROR,
383 "Nr. of packets in packet index for stream index %d "
384 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
385 str_id, avio_size(pb), avio_tell(pb),
386 (avio_size(pb) - avio_tell(pb)) / 14);
390 for (n = 0; n < n_pkts; n++) {
394 avio_skip(pb, 4); /* packet no. */
396 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
400 if (next_off && avio_tell(pb) < next_off &&
401 avio_seek(pb, next_off, SEEK_SET) < 0) {
402 av_log(s, AV_LOG_ERROR,
403 "Non-linear index detected, not supported\n");
411 static int rm_read_header_old(AVFormatContext *s)
413 RMDemuxContext *rm = s->priv_data;
417 st = avformat_new_stream(s, NULL);
420 st->priv_data = ff_rm_alloc_rmstream();
422 return AVERROR(ENOMEM);
423 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
426 static int rm_read_header(AVFormatContext *s)
428 RMDemuxContext *rm = s->priv_data;
430 AVIOContext *pb = s->pb;
433 unsigned int start_time, duration;
434 unsigned int data_off = 0, indx_off = 0;
439 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
440 /* very old .ra format */
441 return rm_read_header_old(s);
442 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
446 tag_size = avio_rb32(pb);
447 avio_skip(pb, tag_size - 8);
453 tag_size = avio_rb32(pb);
455 av_log(s, AV_LOG_TRACE, "tag=%c%c%c%c (%08x) size=%d\n",
462 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
465 case MKTAG('P', 'R', 'O', 'P'):
467 avio_rb32(pb); /* max bit rate */
468 avio_rb32(pb); /* avg bit rate */
469 avio_rb32(pb); /* max packet size */
470 avio_rb32(pb); /* avg packet size */
471 avio_rb32(pb); /* nb packets */
472 avio_rb32(pb); /* duration */
473 avio_rb32(pb); /* preroll */
474 indx_off = avio_rb32(pb); /* index offset */
475 data_off = avio_rb32(pb); /* data offset */
476 avio_rb16(pb); /* nb streams */
477 flags = avio_rb16(pb); /* flags */
479 case MKTAG('C', 'O', 'N', 'T'):
480 rm_read_metadata(s, pb, 1);
482 case MKTAG('M', 'D', 'P', 'R'):
483 st = avformat_new_stream(s, NULL);
485 return AVERROR(ENOMEM);
486 st->id = avio_rb16(pb);
487 avio_rb32(pb); /* max bit rate */
488 st->codecpar->bit_rate = avio_rb32(pb); /* bit rate */
489 avio_rb32(pb); /* max packet size */
490 avio_rb32(pb); /* avg packet size */
491 start_time = avio_rb32(pb); /* start time */
492 avio_rb32(pb); /* preroll */
493 duration = avio_rb32(pb); /* duration */
494 st->start_time = start_time;
495 st->duration = duration;
496 get_str8(pb, buf, sizeof(buf)); /* desc */
497 get_str8(pb, buf, sizeof(buf)); /* mimetype */
498 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
499 st->priv_data = ff_rm_alloc_rmstream();
501 return AVERROR(ENOMEM);
502 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
506 case MKTAG('D', 'A', 'T', 'A'):
509 /* unknown tag: skip it */
510 avio_skip(pb, tag_size - 10);
515 rm->nb_packets = avio_rb32(pb); /* number of packets */
516 if (!rm->nb_packets && (flags & 4))
517 rm->nb_packets = 3600 * 25;
518 avio_rb32(pb); /* next data header */
521 data_off = avio_tell(pb) - 18;
522 if (indx_off && (pb->seekable & AVIO_SEEKABLE_NORMAL) &&
523 !(s->flags & AVFMT_FLAG_IGNIDX) &&
524 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
526 avio_seek(pb, data_off + 18, SEEK_SET);
532 static int get_num(AVIOContext *pb, int *len)
544 return (n << 16) | n1;
548 /* multiple of 20 bytes for ra144 (ugly) */
549 #define RAW_PACKET_SIZE 1000
551 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
552 RMDemuxContext *rm = s->priv_data;
553 AVIOContext *pb = s->pb;
555 uint32_t state=0xFFFFFFFF;
557 while(!pb->eof_reached){
559 *pos= avio_tell(pb) - 3;
560 if(rm->remaining_len > 0){
561 num= rm->current_stream;
562 len= rm->remaining_len;
563 *timestamp = AV_NOPTS_VALUE;
566 state= (state<<8) + avio_r8(pb);
568 if(state == MKBETAG('I', 'N', 'D', 'X')){
569 int n_pkts, expected_len;
572 n_pkts = avio_rb32(pb);
573 expected_len = 20 + n_pkts * 14;
575 /* some files don't add index entries to chunk size... */
577 else if (len != expected_len)
578 av_log(s, AV_LOG_WARNING,
579 "Index size %d (%d pkts) is wrong, should be %d.\n",
580 len, n_pkts, expected_len);
581 len -= 14; // we already read part of the index header
585 } else if (state == MKBETAG('D','A','T','A')) {
586 av_log(s, AV_LOG_WARNING,
587 "DATA tag in middle of chunk, file may be broken.\n");
590 if(state > (unsigned)0xFFFF || state <= 12)
596 *timestamp = avio_rb32(pb);
597 avio_r8(pb); /* reserved */
598 *flags = avio_r8(pb); /* flags */
600 for(i=0;i<s->nb_streams;i++) {
605 if (i == s->nb_streams) {
607 /* skip packet if unknown number */
609 rm->remaining_len = 0;
619 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
620 RMDemuxContext *rm, RMStream *vst,
621 AVPacket *pkt, int len, int *pseq,
624 int hdr, seq, pic_num, len2, pos;
627 hdr = avio_r8(pb); len--;
630 if(type != 3){ // not frame as a part of packet
631 seq = avio_r8(pb); len--;
633 if(type != 1){ // not whole frame
634 len2 = get_num(pb, &len);
635 pos = get_num(pb, &len);
636 pic_num = avio_r8(pb); len--;
640 rm->remaining_len = len;
641 if(type&1){ // frame, not slice
642 if(type == 3){ // frame as a part of packet
646 if(rm->remaining_len < len)
648 rm->remaining_len -= len;
649 if(av_new_packet(pkt, len + 9) < 0)
652 AV_WL32(pkt->data + 1, 1);
653 AV_WL32(pkt->data + 5, 0);
654 avio_read(pb, pkt->data + 9, len);
657 //now we have to deal with single slice
660 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
661 vst->slices = ((hdr & 0x3F) << 1) + 1;
662 vst->videobufsize = len2 + 8*vst->slices + 1;
663 av_packet_unref(&vst->pkt); //FIXME this should be output.
664 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
665 return AVERROR(ENOMEM);
666 vst->videobufpos = 8*vst->slices + 1;
668 vst->curpic_num = pic_num;
669 vst->pktpos = avio_tell(pb);
672 len = FFMIN(len, pos);
674 if(++vst->cur_slice > vst->slices)
676 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
677 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
678 if(vst->videobufpos + len > vst->videobufsize)
680 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
682 vst->videobufpos += len;
683 rm->remaining_len-= len;
685 if (type == 2 || vst->videobufpos == vst->videobufsize) {
686 vst->pkt.data[0] = vst->cur_slice-1;
691 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
692 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
693 vst->videobufpos - 1 - 8*vst->slices);
694 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
695 pkt->pts = AV_NOPTS_VALUE;
696 pkt->pos = vst->pktpos;
705 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
710 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
712 for (j=0;j<pkt->size;j+=2) {
713 FFSWAP(int, ptr[0], ptr[1]);
720 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
721 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
722 int *seq, int flags, int64_t timestamp)
724 RMDemuxContext *rm = s->priv_data;
726 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
727 rm->current_stream= st->id;
728 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
729 return -1; //got partial frame
730 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
731 if ((ast->deint_id == DEINT_ID_GENR) ||
732 (ast->deint_id == DEINT_ID_INT4) ||
733 (ast->deint_id == DEINT_ID_SIPR)) {
735 int sps = ast->sub_packet_size;
736 int cfs = ast->coded_framesize;
737 int h = ast->sub_packet_h;
738 int y = ast->sub_packet_cnt;
739 int w = ast->audio_framesize;
742 y = ast->sub_packet_cnt = 0;
744 ast->audiotimestamp = timestamp;
746 switch (ast->deint_id) {
748 for (x = 0; x < h/2; x++)
749 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
752 for (x = 0; x < w/sps; x++)
753 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
756 avio_read(pb, ast->pkt.data + y * w, w);
760 if (++(ast->sub_packet_cnt) < h)
762 if (ast->deint_id == DEINT_ID_SIPR)
763 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
765 ast->sub_packet_cnt = 0;
766 rm->audio_stream_num = st->index;
767 rm->audio_pkt_cnt = h * w / st->codecpar->block_align;
768 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
769 (ast->deint_id == DEINT_ID_VBRS)) {
771 rm->audio_stream_num = st->index;
772 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
773 if (ast->sub_packet_cnt) {
774 for (x = 0; x < ast->sub_packet_cnt; x++)
775 ast->sub_packet_lengths[x] = avio_rb16(pb);
776 rm->audio_pkt_cnt = ast->sub_packet_cnt;
777 ast->audiotimestamp = timestamp;
781 av_get_packet(pb, pkt, len);
782 rm_ac3_swap_bytes(st, pkt);
785 av_get_packet(pb, pkt, len);
787 pkt->stream_index = st->index;
789 pkt->pts = timestamp;
791 pkt->flags |= AV_PKT_FLAG_KEY;
793 return st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
797 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
798 AVStream *st, RMStream *ast, AVPacket *pkt)
800 RMDemuxContext *rm = s->priv_data;
802 assert (rm->audio_pkt_cnt > 0);
804 if (ast->deint_id == DEINT_ID_VBRF ||
805 ast->deint_id == DEINT_ID_VBRS)
806 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
808 int ret = av_new_packet(pkt, st->codecpar->block_align);
811 memcpy(pkt->data, ast->pkt.data + st->codecpar->block_align * //FIXME avoid this
812 (ast->sub_packet_h * ast->audio_framesize / st->codecpar->block_align - rm->audio_pkt_cnt),
813 st->codecpar->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){
870 av_packet_unref(pkt);
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->codecpar->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_log(s, AV_LOG_TRACE, "%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,