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, AVCodecContext *avctx, unsigned size)
89 avctx->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
90 if (!avctx->extradata)
91 return AVERROR(ENOMEM);
92 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
93 if (avctx->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_free_packet(&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->codec->sample_rate = 8000;
146 st->codec->channels = 1;
147 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
148 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
149 st->codec->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->codec->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->codec->sample_rate = avio_rb16(pb);
174 st->codec->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->codec->codec_type = AVMEDIA_TYPE_AUDIO;
185 st->codec->codec_tag = AV_RL32(buf);
186 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
187 st->codec->codec_tag);
189 switch (st->codec->codec_id) {
190 case AV_CODEC_ID_AC3:
191 st->need_parsing = AVSTREAM_PARSE_FULL;
193 case AV_CODEC_ID_RA_288:
194 st->codec->extradata_size= 0;
195 ast->audio_framesize = st->codec->block_align;
196 st->codec->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 + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
207 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
211 ast->audio_framesize = st->codec->block_align;
212 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
214 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
218 st->codec->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->codec->block_align = ast->sub_packet_size;
226 if ((ret = rm_read_extradata(pb, st->codec, 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 + FF_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->codec, 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->codec->block_align <= 0 ||
249 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
250 ast->audio_framesize * sub_packet_h < st->codec->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->codec, codec_data_size)) < 0)
308 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
309 st->codec->codec_tag = AV_RL32(st->codec->extradata);
310 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
311 st->codec->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->codec->codec_tag = avio_rl32(pb);
320 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
321 st->codec->codec_tag);
322 av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
323 if (st->codec->codec_id == AV_CODEC_ID_NONE)
325 st->codec->width = avio_rb16(pb);
326 st->codec->height = avio_rb16(pb);
327 avio_skip(pb, 2); // looks like bits per sample
328 avio_skip(pb, 4); // always zero?
329 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
330 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
333 if ((ret = rm_read_extradata(pb, st->codec, 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_dlog(s, "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->codec->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->codec->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 && !(s->flags & AVFMT_FLAG_IGNIDX) &&
523 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
525 avio_seek(pb, data_off + 18, SEEK_SET);
531 static int get_num(AVIOContext *pb, int *len)
543 return (n << 16) | n1;
547 /* multiple of 20 bytes for ra144 (ugly) */
548 #define RAW_PACKET_SIZE 1000
550 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
551 RMDemuxContext *rm = s->priv_data;
552 AVIOContext *pb = s->pb;
554 uint32_t state=0xFFFFFFFF;
556 while(!pb->eof_reached){
558 *pos= avio_tell(pb) - 3;
559 if(rm->remaining_len > 0){
560 num= rm->current_stream;
561 len= rm->remaining_len;
562 *timestamp = AV_NOPTS_VALUE;
565 state= (state<<8) + avio_r8(pb);
567 if(state == MKBETAG('I', 'N', 'D', 'X')){
568 int n_pkts, expected_len;
571 n_pkts = avio_rb32(pb);
572 expected_len = 20 + n_pkts * 14;
574 /* some files don't add index entries to chunk size... */
576 else if (len != expected_len)
577 av_log(s, AV_LOG_WARNING,
578 "Index size %d (%d pkts) is wrong, should be %d.\n",
579 len, n_pkts, expected_len);
580 len -= 14; // we already read part of the index header
584 } else if (state == MKBETAG('D','A','T','A')) {
585 av_log(s, AV_LOG_WARNING,
586 "DATA tag in middle of chunk, file may be broken.\n");
589 if(state > (unsigned)0xFFFF || state <= 12)
595 *timestamp = avio_rb32(pb);
596 avio_r8(pb); /* reserved */
597 *flags = avio_r8(pb); /* flags */
599 for(i=0;i<s->nb_streams;i++) {
604 if (i == s->nb_streams) {
606 /* skip packet if unknown number */
608 rm->remaining_len = 0;
618 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
619 RMDemuxContext *rm, RMStream *vst,
620 AVPacket *pkt, int len, int *pseq,
623 int hdr, seq, pic_num, len2, pos;
626 hdr = avio_r8(pb); len--;
629 if(type != 3){ // not frame as a part of packet
630 seq = avio_r8(pb); len--;
632 if(type != 1){ // not whole frame
633 len2 = get_num(pb, &len);
634 pos = get_num(pb, &len);
635 pic_num = avio_r8(pb); len--;
639 rm->remaining_len = len;
640 if(type&1){ // frame, not slice
641 if(type == 3){ // frame as a part of packet
645 if(rm->remaining_len < len)
647 rm->remaining_len -= len;
648 if(av_new_packet(pkt, len + 9) < 0)
651 AV_WL32(pkt->data + 1, 1);
652 AV_WL32(pkt->data + 5, 0);
653 avio_read(pb, pkt->data + 9, len);
656 //now we have to deal with single slice
659 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
660 vst->slices = ((hdr & 0x3F) << 1) + 1;
661 vst->videobufsize = len2 + 8*vst->slices + 1;
662 av_free_packet(&vst->pkt); //FIXME this should be output.
663 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
664 return AVERROR(ENOMEM);
665 vst->videobufpos = 8*vst->slices + 1;
667 vst->curpic_num = pic_num;
668 vst->pktpos = avio_tell(pb);
671 len = FFMIN(len, pos);
673 if(++vst->cur_slice > vst->slices)
675 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
676 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
677 if(vst->videobufpos + len > vst->videobufsize)
679 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
681 vst->videobufpos += len;
682 rm->remaining_len-= len;
684 if (type == 2 || vst->videobufpos == vst->videobufsize) {
685 vst->pkt.data[0] = vst->cur_slice-1;
690 #if FF_API_DESTRUCT_PACKET
691 FF_DISABLE_DEPRECATION_WARNINGS
692 vst->pkt.destruct = NULL;
693 FF_ENABLE_DEPRECATION_WARNINGS
695 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
696 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
697 vst->videobufpos - 1 - 8*vst->slices);
698 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
699 pkt->pts = AV_NOPTS_VALUE;
700 pkt->pos = vst->pktpos;
709 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
714 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
716 for (j=0;j<pkt->size;j+=2) {
717 FFSWAP(int, ptr[0], ptr[1]);
724 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
725 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
726 int *seq, int flags, int64_t timestamp)
728 RMDemuxContext *rm = s->priv_data;
730 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
731 rm->current_stream= st->id;
732 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
733 return -1; //got partial frame
734 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
735 if ((ast->deint_id == DEINT_ID_GENR) ||
736 (ast->deint_id == DEINT_ID_INT4) ||
737 (ast->deint_id == DEINT_ID_SIPR)) {
739 int sps = ast->sub_packet_size;
740 int cfs = ast->coded_framesize;
741 int h = ast->sub_packet_h;
742 int y = ast->sub_packet_cnt;
743 int w = ast->audio_framesize;
746 y = ast->sub_packet_cnt = 0;
748 ast->audiotimestamp = timestamp;
750 switch (ast->deint_id) {
752 for (x = 0; x < h/2; x++)
753 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
756 for (x = 0; x < w/sps; x++)
757 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
760 avio_read(pb, ast->pkt.data + y * w, w);
764 if (++(ast->sub_packet_cnt) < h)
766 if (ast->deint_id == DEINT_ID_SIPR)
767 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
769 ast->sub_packet_cnt = 0;
770 rm->audio_stream_num = st->index;
771 rm->audio_pkt_cnt = h * w / st->codec->block_align;
772 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
773 (ast->deint_id == DEINT_ID_VBRS)) {
775 rm->audio_stream_num = st->index;
776 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
777 if (ast->sub_packet_cnt) {
778 for (x = 0; x < ast->sub_packet_cnt; x++)
779 ast->sub_packet_lengths[x] = avio_rb16(pb);
780 rm->audio_pkt_cnt = ast->sub_packet_cnt;
781 ast->audiotimestamp = timestamp;
785 av_get_packet(pb, pkt, len);
786 rm_ac3_swap_bytes(st, pkt);
789 av_get_packet(pb, pkt, len);
791 pkt->stream_index = st->index;
794 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
795 if(st->codec->codec_id == AV_CODEC_ID_RV20){
796 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
797 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
799 seq |= (timestamp&~0x3FFF);
800 if(seq - timestamp > 0x2000) seq -= 0x4000;
801 if(seq - timestamp < -0x2000) seq += 0x4000;
806 pkt->pts = timestamp;
808 pkt->flags |= AV_PKT_FLAG_KEY;
810 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
814 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
815 AVStream *st, RMStream *ast, AVPacket *pkt)
817 RMDemuxContext *rm = s->priv_data;
819 assert (rm->audio_pkt_cnt > 0);
821 if (ast->deint_id == DEINT_ID_VBRF ||
822 ast->deint_id == DEINT_ID_VBRS)
823 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
825 int ret = av_new_packet(pkt, st->codec->block_align);
828 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
829 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
830 st->codec->block_align);
833 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
834 ast->audiotimestamp = AV_NOPTS_VALUE;
835 pkt->flags = AV_PKT_FLAG_KEY;
838 pkt->stream_index = st->index;
840 return rm->audio_pkt_cnt;
843 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
845 RMDemuxContext *rm = s->priv_data;
847 int i, len, res, seq = 1;
848 int64_t timestamp, pos;
852 if (rm->audio_pkt_cnt) {
853 // If there are queued audio packet return them first
854 st = s->streams[rm->audio_stream_num];
855 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
858 if (rm->old_format) {
863 timestamp = AV_NOPTS_VALUE;
864 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
865 ast->coded_framesize * ast->sub_packet_h / 2;
866 flags = (seq++ == 1) ? 2 : 0;
867 pos = avio_tell(s->pb);
869 len=sync(s, ×tamp, &flags, &i, &pos);
874 if (len <= 0 || s->pb->eof_reached)
877 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
878 &seq, flags, timestamp);
879 if((flags&2) && (seq&0x7F) == 1)
880 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
885 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
886 || st->discard >= AVDISCARD_ALL){
895 static int rm_read_close(AVFormatContext *s)
899 for (i=0;i<s->nb_streams;i++)
900 ff_rm_free_rmstream(s->streams[i]->priv_data);
905 static int rm_probe(AVProbeData *p)
907 /* check file header */
908 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
909 p->buf[2] == 'M' && p->buf[3] == 'F' &&
910 p->buf[4] == 0 && p->buf[5] == 0) ||
911 (p->buf[0] == '.' && p->buf[1] == 'r' &&
912 p->buf[2] == 'a' && p->buf[3] == 0xfd))
913 return AVPROBE_SCORE_MAX;
918 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
919 int64_t *ppos, int64_t pos_limit)
921 RMDemuxContext *rm = s->priv_data;
923 int stream_index2, flags, len, h;
928 return AV_NOPTS_VALUE;
930 avio_seek(s->pb, pos, SEEK_SET);
936 len=sync(s, &dts, &flags, &stream_index2, &pos);
938 return AV_NOPTS_VALUE;
940 st = s->streams[stream_index2];
941 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
942 h= avio_r8(s->pb); len--;
944 seq = avio_r8(s->pb); len--;
948 if((flags&2) && (seq&0x7F) == 1){
949 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
950 flags, stream_index2, stream_index, dts, seq);
951 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
952 if(stream_index2 == stream_index)
956 avio_skip(s->pb, len);
962 AVInputFormat ff_rm_demuxer = {
964 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
965 .priv_data_size = sizeof(RMDemuxContext),
966 .read_probe = rm_probe,
967 .read_header = rm_read_header,
968 .read_packet = rm_read_packet,
969 .read_close = rm_read_close,
970 .read_timestamp = rm_read_dts,
973 AVInputFormat ff_rdt_demuxer = {
975 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
976 .priv_data_size = sizeof(RMDemuxContext),
977 .read_close = rm_read_close,
978 .flags = AVFMT_NOFILE,