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/internal.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/dict.h"
29 #include "avio_internal.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
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 if (ff_get_extradata(avctx, pb, size) < 0)
90 return AVERROR(ENOMEM);
94 static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
99 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
100 int len = wide ? avio_rb16(pb) : avio_r8(pb);
101 get_strl(pb, buf, sizeof(buf), len);
102 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
106 RMStream *ff_rm_alloc_rmstream (void)
108 RMStream *rms = av_mallocz(sizeof(RMStream));
109 rms->curpic_num = -1;
113 void ff_rm_free_rmstream (RMStream *rms)
115 av_free_packet(&rms->pkt);
118 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
119 AVStream *st, RMStream *ast, int read_all)
126 version = avio_rb16(pb); /* version */
128 unsigned bytes_per_minute;
129 int header_size = avio_rb16(pb);
130 int64_t startpos = avio_tell(pb);
132 bytes_per_minute = avio_rb16(pb);
134 rm_read_metadata(s, pb, 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 if (bytes_per_minute)
144 st->codec->bit_rate = 8LL * bytes_per_minute / 60;
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 unsigned bytes_per_minute;
155 /* old version (4) */
156 avio_skip(pb, 2); /* unused */
157 avio_rb32(pb); /* .ra4 */
158 avio_rb32(pb); /* data size */
159 avio_rb16(pb); /* version2 */
160 avio_rb32(pb); /* header size */
161 flavor= avio_rb16(pb); /* add codec info / flavor */
162 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
163 avio_rb32(pb); /* ??? */
164 bytes_per_minute = avio_rb32(pb);
166 if (bytes_per_minute)
167 st->codec->bit_rate = 8LL * bytes_per_minute / 60;
169 avio_rb32(pb); /* ??? */
170 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
171 st->codec->block_align= avio_rb16(pb); /* frame size */
172 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
173 avio_rb16(pb); /* ??? */
175 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
177 st->codec->sample_rate = avio_rb16(pb);
179 st->codec->channels = avio_rb16(pb);
181 ast->deint_id = avio_rl32(pb);
182 avio_read(pb, buf, 4);
186 get_str8(pb, buf, sizeof(buf)); /* desc */
187 ast->deint_id = AV_RL32(buf);
188 get_str8(pb, buf, sizeof(buf)); /* desc */
190 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
191 st->codec->codec_tag = AV_RL32(buf);
192 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
193 st->codec->codec_tag);
195 switch (st->codec->codec_id) {
196 case AV_CODEC_ID_AC3:
197 st->need_parsing = AVSTREAM_PARSE_FULL;
199 case AV_CODEC_ID_RA_288:
200 st->codec->extradata_size= 0;
201 ast->audio_framesize = st->codec->block_align;
202 st->codec->block_align = coded_framesize;
204 case AV_CODEC_ID_COOK:
205 st->need_parsing = AVSTREAM_PARSE_HEADERS;
206 case AV_CODEC_ID_ATRAC3:
207 case AV_CODEC_ID_SIPR:
209 codecdata_length = 0;
211 avio_rb16(pb); avio_r8(pb);
214 codecdata_length = avio_rb32(pb);
215 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
216 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
221 ast->audio_framesize = st->codec->block_align;
222 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
224 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
228 st->codec->block_align = ff_sipr_subpk_size[flavor];
230 if(sub_packet_size <= 0){
231 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
234 st->codec->block_align = ast->sub_packet_size;
236 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
240 case AV_CODEC_ID_AAC:
241 avio_rb16(pb); avio_r8(pb);
244 codecdata_length = avio_rb32(pb);
245 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
246 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
249 if (codecdata_length >= 1) {
251 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
256 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
258 switch (ast->deint_id) {
260 if (ast->coded_framesize > ast->audio_framesize ||
262 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
263 return AVERROR_INVALIDDATA;
264 if (ast->coded_framesize * sub_packet_h != 2*ast->audio_framesize) {
265 avpriv_request_sample(s, "mismatching interleaver parameters");
266 return AVERROR_INVALIDDATA;
270 if (ast->sub_packet_size <= 0 ||
271 ast->sub_packet_size > ast->audio_framesize)
272 return AVERROR_INVALIDDATA;
280 av_log(s, AV_LOG_ERROR, "Unknown interleaver %X\n", ast->deint_id);
281 return AVERROR_INVALIDDATA;
283 if (ast->deint_id == DEINT_ID_INT4 ||
284 ast->deint_id == DEINT_ID_GENR ||
285 ast->deint_id == DEINT_ID_SIPR) {
286 if (st->codec->block_align <= 0 ||
287 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
288 ast->audio_framesize * sub_packet_h < st->codec->block_align)
289 return AVERROR_INVALIDDATA;
290 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
291 return AVERROR(ENOMEM);
298 rm_read_metadata(s, pb, 0);
305 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
306 AVStream *st, RMStream *rst, int codec_data_size, const uint8_t *mime)
313 avpriv_set_pts_info(st, 64, 1, 1000);
314 codec_pos = avio_tell(pb);
316 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
318 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
320 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
321 avio_seek(pb, -4, SEEK_CUR);
322 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
325 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
326 st->codec->codec_tag = AV_RL32(st->codec->extradata);
327 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
328 st->codec->codec_tag);
329 } else if(mime && !strcmp(mime, "logical-fileinfo")){
330 int stream_count, rule_count, property_count, i;
331 ff_free_stream(s, st);
332 if (avio_rb16(pb) != 0) {
333 av_log(s, AV_LOG_WARNING, "Unsupported version\n");
336 stream_count = avio_rb16(pb);
337 avio_skip(pb, 6*stream_count);
338 rule_count = avio_rb16(pb);
339 avio_skip(pb, 2*rule_count);
340 property_count = avio_rb16(pb);
341 for(i=0; i<property_count; i++){
342 uint8_t name[128], val[128];
344 if (avio_rb16(pb) != 0) {
345 av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
346 goto skip; //FIXME skip just this one
348 get_str8(pb, name, sizeof(name));
349 switch(avio_rb32(pb)) {
350 case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
351 av_dict_set(&s->metadata, name, val, 0);
353 default: avio_skip(pb, avio_rb16(pb));
358 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
360 av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
363 st->codec->codec_tag = avio_rl32(pb);
364 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
365 st->codec->codec_tag);
366 av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
367 if (st->codec->codec_id == AV_CODEC_ID_NONE)
369 st->codec->width = avio_rb16(pb);
370 st->codec->height = avio_rb16(pb);
371 avio_skip(pb, 2); // looks like bits per sample
372 avio_skip(pb, 4); // always zero?
373 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
374 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
377 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
381 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
382 0x10000, fps, (1 << 30) - 1);
383 #if FF_API_R_FRAME_RATE
384 st->r_frame_rate = st->avg_frame_rate;
386 } else if (s->error_recognition & AV_EF_EXPLODE) {
387 av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
388 return AVERROR_INVALIDDATA;
393 /* skip codec info */
394 size = avio_tell(pb) - codec_pos;
395 avio_skip(pb, codec_data_size - size);
400 /** this function assumes that the demuxer has already seeked to the start
401 * of the INDX chunk, and will bail out if not. */
402 static int rm_read_index(AVFormatContext *s)
404 AVIOContext *pb = s->pb;
405 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
409 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
411 size = avio_rb32(pb);
415 n_pkts = avio_rb32(pb);
416 str_id = avio_rb16(pb);
417 next_off = avio_rb32(pb);
418 for (n = 0; n < s->nb_streams; n++)
419 if (s->streams[n]->id == str_id) {
423 if (n == s->nb_streams) {
424 av_log(s, AV_LOG_ERROR,
425 "Invalid stream index %d for index at pos %"PRId64"\n",
426 str_id, avio_tell(pb));
428 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
429 av_log(s, AV_LOG_ERROR,
430 "Nr. of packets in packet index for stream index %d "
431 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
432 str_id, avio_size(pb), avio_tell(pb),
433 (avio_size(pb) - avio_tell(pb)) / 14);
437 for (n = 0; n < n_pkts; n++) {
441 avio_skip(pb, 4); /* packet no. */
443 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
447 if (next_off && avio_tell(pb) < next_off &&
448 avio_seek(pb, next_off, SEEK_SET) < 0) {
449 av_log(s, AV_LOG_ERROR,
450 "Non-linear index detected, not supported\n");
458 static int rm_read_header_old(AVFormatContext *s)
460 RMDemuxContext *rm = s->priv_data;
464 st = avformat_new_stream(s, NULL);
467 st->priv_data = ff_rm_alloc_rmstream();
468 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
471 static int rm_read_header(AVFormatContext *s)
473 RMDemuxContext *rm = s->priv_data;
475 AVIOContext *pb = s->pb;
478 unsigned int start_time, duration;
479 unsigned int data_off = 0, indx_off = 0;
480 char buf[128], mime[128];
484 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
485 /* very old .ra format */
486 return rm_read_header_old(s);
487 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
491 tag_size = avio_rb32(pb);
492 avio_skip(pb, tag_size - 8);
498 tag_size = avio_rb32(pb);
500 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
507 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
510 case MKTAG('P', 'R', 'O', 'P'):
512 avio_rb32(pb); /* max bit rate */
513 avio_rb32(pb); /* avg bit rate */
514 avio_rb32(pb); /* max packet size */
515 avio_rb32(pb); /* avg packet size */
516 avio_rb32(pb); /* nb packets */
517 duration = avio_rb32(pb); /* duration */
518 s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
519 avio_rb32(pb); /* preroll */
520 indx_off = avio_rb32(pb); /* index offset */
521 data_off = avio_rb32(pb); /* data offset */
522 avio_rb16(pb); /* nb streams */
523 flags = avio_rb16(pb); /* flags */
525 case MKTAG('C', 'O', 'N', 'T'):
526 rm_read_metadata(s, pb, 1);
528 case MKTAG('M', 'D', 'P', 'R'):
529 st = avformat_new_stream(s, NULL);
531 return AVERROR(ENOMEM);
532 st->id = avio_rb16(pb);
533 avio_rb32(pb); /* max bit rate */
534 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
535 avio_rb32(pb); /* max packet size */
536 avio_rb32(pb); /* avg packet size */
537 start_time = avio_rb32(pb); /* start time */
538 avio_rb32(pb); /* preroll */
539 duration = avio_rb32(pb); /* duration */
540 st->start_time = start_time;
541 st->duration = duration;
543 s->duration = AV_NOPTS_VALUE;
544 get_str8(pb, buf, sizeof(buf)); /* desc */
545 get_str8(pb, mime, sizeof(mime)); /* mimetype */
546 st->codec->codec_type = AVMEDIA_TYPE_DATA;
547 st->priv_data = ff_rm_alloc_rmstream();
548 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
549 avio_rb32(pb), mime) < 0)
552 case MKTAG('D', 'A', 'T', 'A'):
555 /* unknown tag: skip it */
556 avio_skip(pb, tag_size - 10);
561 rm->nb_packets = avio_rb32(pb); /* number of packets */
562 if (!rm->nb_packets && (flags & 4))
563 rm->nb_packets = 3600 * 25;
564 avio_rb32(pb); /* next data header */
567 data_off = avio_tell(pb) - 18;
568 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
569 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
571 avio_seek(pb, data_off + 18, SEEK_SET);
577 static int get_num(AVIOContext *pb, int *len)
589 return (n << 16) | n1;
593 /* multiple of 20 bytes for ra144 (ugly) */
594 #define RAW_PACKET_SIZE 1000
596 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
597 RMDemuxContext *rm = s->priv_data;
598 AVIOContext *pb = s->pb;
600 uint32_t state=0xFFFFFFFF;
602 while(!url_feof(pb)){
604 *pos= avio_tell(pb) - 3;
605 if(rm->remaining_len > 0){
606 num= rm->current_stream;
607 len= rm->remaining_len;
608 *timestamp = AV_NOPTS_VALUE;
611 state= (state<<8) + avio_r8(pb);
613 if(state == MKBETAG('I', 'N', 'D', 'X')){
614 int n_pkts, expected_len;
617 n_pkts = avio_rb32(pb);
618 expected_len = 20 + n_pkts * 14;
620 /* some files don't add index entries to chunk size... */
622 else if (len != expected_len)
623 av_log(s, AV_LOG_WARNING,
624 "Index size %d (%d pkts) is wrong, should be %d.\n",
625 len, n_pkts, expected_len);
626 len -= 14; // we already read part of the index header
630 } else if (state == MKBETAG('D','A','T','A')) {
631 av_log(s, AV_LOG_WARNING,
632 "DATA tag in middle of chunk, file may be broken.\n");
635 if(state > (unsigned)0xFFFF || state <= 12)
641 *timestamp = avio_rb32(pb);
642 avio_r8(pb); /* reserved */
643 *flags = avio_r8(pb); /* flags */
645 for(i=0;i<s->nb_streams;i++) {
650 if (i == s->nb_streams) {
652 /* skip packet if unknown number */
654 rm->remaining_len = 0;
664 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
665 RMDemuxContext *rm, RMStream *vst,
666 AVPacket *pkt, int len, int *pseq,
670 int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
674 hdr = avio_r8(pb); len--;
677 if(type != 3){ // not frame as a part of packet
678 seq = avio_r8(pb); len--;
680 if(type != 1){ // not whole frame
681 len2 = get_num(pb, &len);
682 pos = get_num(pb, &len);
683 pic_num = avio_r8(pb); len--;
686 av_log(s, AV_LOG_ERROR, "Insufficient data\n");
689 rm->remaining_len = len;
690 if(type&1){ // frame, not slice
691 if(type == 3){ // frame as a part of packet
695 if(rm->remaining_len < len) {
696 av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
699 rm->remaining_len -= len;
700 if(av_new_packet(pkt, len + 9) < 0)
703 AV_WL32(pkt->data + 1, 1);
704 AV_WL32(pkt->data + 5, 0);
705 if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
707 av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
708 return ret < 0 ? ret : AVERROR(EIO);
712 //now we have to deal with single slice
715 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
716 if (len2 > ffio_limit(pb, len2)) {
717 av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
718 return AVERROR_INVALIDDATA;
720 vst->slices = ((hdr & 0x3F) << 1) + 1;
721 vst->videobufsize = len2 + 8*vst->slices + 1;
722 av_free_packet(&vst->pkt); //FIXME this should be output.
723 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
724 return AVERROR(ENOMEM);
725 memset(vst->pkt.data, 0, vst->pkt.size);
726 vst->videobufpos = 8*vst->slices + 1;
728 vst->curpic_num = pic_num;
729 vst->pktpos = avio_tell(pb);
732 len = FFMIN(len, pos);
734 if(++vst->cur_slice > vst->slices) {
735 av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
739 return AVERROR(ENOMEM);
740 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
741 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
742 if(vst->videobufpos + len > vst->videobufsize) {
743 av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
746 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
748 vst->videobufpos += len;
749 rm->remaining_len-= len;
751 if (type == 2 || vst->videobufpos == vst->videobufsize) {
752 vst->pkt.data[0] = vst->cur_slice-1;
757 #if FF_API_DESTRUCT_PACKET
758 FF_DISABLE_DEPRECATION_WARNINGS
759 vst->pkt.destruct = NULL;
760 FF_ENABLE_DEPRECATION_WARNINGS
762 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
763 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
764 vst->videobufpos - 1 - 8*vst->slices);
765 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
766 pkt->pts = AV_NOPTS_VALUE;
767 pkt->pos = vst->pktpos;
776 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
781 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
783 for (j=0;j<pkt->size;j+=2) {
784 FFSWAP(int, ptr[0], ptr[1]);
791 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
792 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
793 int *seq, int flags, int64_t timestamp)
795 RMDemuxContext *rm = s->priv_data;
798 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
799 rm->current_stream= st->id;
800 ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp);
802 return ret < 0 ? ret : -1; //got partial frame or error
803 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
804 if ((ast->deint_id == DEINT_ID_GENR) ||
805 (ast->deint_id == DEINT_ID_INT4) ||
806 (ast->deint_id == DEINT_ID_SIPR)) {
808 int sps = ast->sub_packet_size;
809 int cfs = ast->coded_framesize;
810 int h = ast->sub_packet_h;
811 int y = ast->sub_packet_cnt;
812 int w = ast->audio_framesize;
815 y = ast->sub_packet_cnt = 0;
817 ast->audiotimestamp = timestamp;
819 switch (ast->deint_id) {
821 for (x = 0; x < h/2; x++)
822 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
825 for (x = 0; x < w/sps; x++)
826 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
829 avio_read(pb, ast->pkt.data + y * w, w);
833 if (++(ast->sub_packet_cnt) < h)
835 if (ast->deint_id == DEINT_ID_SIPR)
836 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
838 ast->sub_packet_cnt = 0;
839 rm->audio_stream_num = st->index;
840 rm->audio_pkt_cnt = h * w / st->codec->block_align;
841 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
842 (ast->deint_id == DEINT_ID_VBRS)) {
844 rm->audio_stream_num = st->index;
845 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
846 if (ast->sub_packet_cnt) {
847 for (x = 0; x < ast->sub_packet_cnt; x++)
848 ast->sub_packet_lengths[x] = avio_rb16(pb);
849 rm->audio_pkt_cnt = ast->sub_packet_cnt;
850 ast->audiotimestamp = timestamp;
854 av_get_packet(pb, pkt, len);
855 rm_ac3_swap_bytes(st, pkt);
858 av_get_packet(pb, pkt, len);
860 pkt->stream_index = st->index;
863 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
864 if(st->codec->codec_id == AV_CODEC_ID_RV20){
865 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
866 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
868 seq |= (timestamp&~0x3FFF);
869 if(seq - timestamp > 0x2000) seq -= 0x4000;
870 if(seq - timestamp < -0x2000) seq += 0x4000;
875 pkt->pts = timestamp;
877 pkt->flags |= AV_PKT_FLAG_KEY;
879 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
883 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
884 AVStream *st, RMStream *ast, AVPacket *pkt)
886 RMDemuxContext *rm = s->priv_data;
888 av_assert0 (rm->audio_pkt_cnt > 0);
890 if (ast->deint_id == DEINT_ID_VBRF ||
891 ast->deint_id == DEINT_ID_VBRS)
892 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
894 if(av_new_packet(pkt, st->codec->block_align) < 0)
895 return AVERROR(ENOMEM);
896 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
897 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
898 st->codec->block_align);
901 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
902 ast->audiotimestamp = AV_NOPTS_VALUE;
903 pkt->flags = AV_PKT_FLAG_KEY;
906 pkt->stream_index = st->index;
908 return rm->audio_pkt_cnt;
911 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
913 RMDemuxContext *rm = s->priv_data;
914 AVStream *st = NULL; // init to silence compiler warning
915 int i, len, res, seq = 1;
916 int64_t timestamp, pos;
920 if (rm->audio_pkt_cnt) {
921 // If there are queued audio packet return them first
922 st = s->streams[rm->audio_stream_num];
923 res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
928 if (rm->old_format) {
933 timestamp = AV_NOPTS_VALUE;
934 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
935 ast->coded_framesize * ast->sub_packet_h / 2;
936 flags = (seq++ == 1) ? 2 : 0;
937 pos = avio_tell(s->pb);
939 len=sync(s, ×tamp, &flags, &i, &pos);
944 if(len<0 || url_feof(s->pb))
947 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
948 &seq, flags, timestamp);
951 if((flags&2) && (seq&0x7F) == 1)
952 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
957 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
958 || st->discard >= AVDISCARD_ALL){
967 static int rm_read_close(AVFormatContext *s)
971 for (i=0;i<s->nb_streams;i++)
972 ff_rm_free_rmstream(s->streams[i]->priv_data);
977 static int rm_probe(AVProbeData *p)
979 /* check file header */
980 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
981 p->buf[2] == 'M' && p->buf[3] == 'F' &&
982 p->buf[4] == 0 && p->buf[5] == 0) ||
983 (p->buf[0] == '.' && p->buf[1] == 'r' &&
984 p->buf[2] == 'a' && p->buf[3] == 0xfd))
985 return AVPROBE_SCORE_MAX;
990 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
991 int64_t *ppos, int64_t pos_limit)
993 RMDemuxContext *rm = s->priv_data;
995 int stream_index2, flags, len, h;
1000 return AV_NOPTS_VALUE;
1002 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1003 return AV_NOPTS_VALUE;
1005 rm->remaining_len=0;
1010 len=sync(s, &dts, &flags, &stream_index2, &pos);
1012 return AV_NOPTS_VALUE;
1014 st = s->streams[stream_index2];
1015 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1016 h= avio_r8(s->pb); len--;
1018 seq = avio_r8(s->pb); len--;
1022 if((flags&2) && (seq&0x7F) == 1){
1023 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
1024 flags, stream_index2, stream_index, dts, seq);
1025 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1026 if(stream_index2 == stream_index)
1030 avio_skip(s->pb, len);
1036 static int rm_read_seek(AVFormatContext *s, int stream_index,
1037 int64_t pts, int flags)
1039 RMDemuxContext *rm = s->priv_data;
1041 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1043 rm->audio_pkt_cnt = 0;
1048 AVInputFormat ff_rm_demuxer = {
1050 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
1051 .priv_data_size = sizeof(RMDemuxContext),
1052 .read_probe = rm_probe,
1053 .read_header = rm_read_header,
1054 .read_packet = rm_read_packet,
1055 .read_close = rm_read_close,
1056 .read_timestamp = rm_read_dts,
1057 .read_seek = rm_read_seek,
1060 AVInputFormat ff_rdt_demuxer = {
1062 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
1063 .priv_data_size = sizeof(RMDemuxContext),
1064 .read_close = rm_read_close,
1065 .flags = AVFMT_NOFILE,