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 avctx->extradata = av_malloc(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 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
94 if (avctx->extradata_size != size)
99 static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
104 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
105 int len = wide ? avio_rb16(pb) : avio_r8(pb);
106 get_strl(pb, buf, sizeof(buf), len);
107 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
111 RMStream *ff_rm_alloc_rmstream (void)
113 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 unsigned bytes_per_minute;
134 int header_size = avio_rb16(pb);
135 int64_t startpos = avio_tell(pb);
137 bytes_per_minute = avio_rb16(pb);
139 rm_read_metadata(s, pb, 0);
140 if ((startpos + header_size) >= avio_tell(pb) + 2) {
141 // fourcc (should always be "lpcJ")
143 get_str8(pb, buf, sizeof(buf));
145 // Skip extra header crap (this should never happen)
146 if ((startpos + header_size) > avio_tell(pb))
147 avio_skip(pb, header_size + startpos - avio_tell(pb));
148 if (bytes_per_minute)
149 st->codec->bit_rate = 8LL * bytes_per_minute / 60;
150 st->codec->sample_rate = 8000;
151 st->codec->channels = 1;
152 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
153 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
154 st->codec->codec_id = AV_CODEC_ID_RA_144;
155 ast->deint_id = DEINT_ID_INT0;
157 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
158 int codecdata_length;
159 unsigned bytes_per_minute;
160 /* old version (4) */
161 avio_skip(pb, 2); /* unused */
162 avio_rb32(pb); /* .ra4 */
163 avio_rb32(pb); /* data size */
164 avio_rb16(pb); /* version2 */
165 avio_rb32(pb); /* header size */
166 flavor= avio_rb16(pb); /* add codec info / flavor */
167 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
168 avio_rb32(pb); /* ??? */
169 bytes_per_minute = avio_rb32(pb);
171 if (bytes_per_minute)
172 st->codec->bit_rate = 8LL * bytes_per_minute / 60;
174 avio_rb32(pb); /* ??? */
175 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
176 st->codec->block_align= avio_rb16(pb); /* frame size */
177 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
178 avio_rb16(pb); /* ??? */
180 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
182 st->codec->sample_rate = avio_rb16(pb);
184 st->codec->channels = avio_rb16(pb);
186 ast->deint_id = avio_rl32(pb);
187 avio_read(pb, buf, 4);
190 get_str8(pb, buf, sizeof(buf)); /* desc */
191 ast->deint_id = AV_RL32(buf);
192 get_str8(pb, buf, sizeof(buf)); /* desc */
194 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
195 st->codec->codec_tag = AV_RL32(buf);
196 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
197 st->codec->codec_tag);
199 switch (st->codec->codec_id) {
200 case AV_CODEC_ID_AC3:
201 st->need_parsing = AVSTREAM_PARSE_FULL;
203 case AV_CODEC_ID_RA_288:
204 st->codec->extradata_size= 0;
205 ast->audio_framesize = st->codec->block_align;
206 st->codec->block_align = coded_framesize;
208 case AV_CODEC_ID_COOK:
209 st->need_parsing = AVSTREAM_PARSE_HEADERS;
210 case AV_CODEC_ID_ATRAC3:
211 case AV_CODEC_ID_SIPR:
213 codecdata_length = 0;
215 avio_rb16(pb); avio_r8(pb);
218 codecdata_length = avio_rb32(pb);
219 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
220 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
225 ast->audio_framesize = st->codec->block_align;
226 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
228 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
232 st->codec->block_align = ff_sipr_subpk_size[flavor];
234 if(sub_packet_size <= 0){
235 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
238 st->codec->block_align = ast->sub_packet_size;
240 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
244 case AV_CODEC_ID_AAC:
245 avio_rb16(pb); avio_r8(pb);
248 codecdata_length = avio_rb32(pb);
249 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
250 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
253 if (codecdata_length >= 1) {
255 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
260 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
262 if (ast->deint_id == DEINT_ID_INT4 ||
263 ast->deint_id == DEINT_ID_GENR ||
264 ast->deint_id == DEINT_ID_SIPR) {
265 if (st->codec->block_align <= 0 ||
266 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
267 ast->audio_framesize * sub_packet_h < st->codec->block_align)
268 return AVERROR_INVALIDDATA;
269 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
270 return AVERROR(ENOMEM);
272 switch (ast->deint_id) {
274 if (ast->coded_framesize > ast->audio_framesize ||
276 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
277 return AVERROR_INVALIDDATA;
280 if (ast->sub_packet_size <= 0 ||
281 ast->sub_packet_size > ast->audio_framesize)
282 return AVERROR_INVALIDDATA;
290 av_log(s, AV_LOG_ERROR, "Unknown interleaver %X\n", ast->deint_id);
291 return AVERROR_INVALIDDATA;
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)
380 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
381 0x10000, fps, (1 << 30) - 1);
382 #if FF_API_R_FRAME_RATE
383 st->r_frame_rate = st->avg_frame_rate;
388 /* skip codec info */
389 size = avio_tell(pb) - codec_pos;
390 avio_skip(pb, codec_data_size - size);
395 /** this function assumes that the demuxer has already seeked to the start
396 * of the INDX chunk, and will bail out if not. */
397 static int rm_read_index(AVFormatContext *s)
399 AVIOContext *pb = s->pb;
400 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
404 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
406 size = avio_rb32(pb);
410 n_pkts = avio_rb32(pb);
411 str_id = avio_rb16(pb);
412 next_off = avio_rb32(pb);
413 for (n = 0; n < s->nb_streams; n++)
414 if (s->streams[n]->id == str_id) {
418 if (n == s->nb_streams) {
419 av_log(s, AV_LOG_ERROR,
420 "Invalid stream index %d for index at pos %"PRId64"\n",
421 str_id, avio_tell(pb));
423 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
424 av_log(s, AV_LOG_ERROR,
425 "Nr. of packets in packet index for stream index %d "
426 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
427 str_id, avio_size(pb), avio_tell(pb),
428 (avio_size(pb) - avio_tell(pb)) / 14);
432 for (n = 0; n < n_pkts; n++) {
436 avio_skip(pb, 4); /* packet no. */
438 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
442 if (next_off && avio_tell(pb) < next_off &&
443 avio_seek(pb, next_off, SEEK_SET) < 0) {
444 av_log(s, AV_LOG_ERROR,
445 "Non-linear index detected, not supported\n");
453 static int rm_read_header_old(AVFormatContext *s)
455 RMDemuxContext *rm = s->priv_data;
459 st = avformat_new_stream(s, NULL);
462 st->priv_data = ff_rm_alloc_rmstream();
463 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
466 static int rm_read_header(AVFormatContext *s)
468 RMDemuxContext *rm = s->priv_data;
470 AVIOContext *pb = s->pb;
473 unsigned int start_time, duration;
474 unsigned int data_off = 0, indx_off = 0;
475 char buf[128], mime[128];
479 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
480 /* very old .ra format */
481 return rm_read_header_old(s);
482 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
486 tag_size = avio_rb32(pb);
487 avio_skip(pb, tag_size - 8);
493 tag_size = avio_rb32(pb);
495 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
502 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
505 case MKTAG('P', 'R', 'O', 'P'):
507 avio_rb32(pb); /* max bit rate */
508 avio_rb32(pb); /* avg bit rate */
509 avio_rb32(pb); /* max packet size */
510 avio_rb32(pb); /* avg packet size */
511 avio_rb32(pb); /* nb packets */
512 duration = avio_rb32(pb); /* duration */
513 s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
514 avio_rb32(pb); /* preroll */
515 indx_off = avio_rb32(pb); /* index offset */
516 data_off = avio_rb32(pb); /* data offset */
517 avio_rb16(pb); /* nb streams */
518 flags = avio_rb16(pb); /* flags */
520 case MKTAG('C', 'O', 'N', 'T'):
521 rm_read_metadata(s, pb, 1);
523 case MKTAG('M', 'D', 'P', 'R'):
524 st = avformat_new_stream(s, NULL);
526 return AVERROR(ENOMEM);
527 st->id = avio_rb16(pb);
528 avio_rb32(pb); /* max bit rate */
529 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
530 avio_rb32(pb); /* max packet size */
531 avio_rb32(pb); /* avg packet size */
532 start_time = avio_rb32(pb); /* start time */
533 avio_rb32(pb); /* preroll */
534 duration = avio_rb32(pb); /* duration */
535 st->start_time = start_time;
536 st->duration = duration;
538 s->duration = AV_NOPTS_VALUE;
539 get_str8(pb, buf, sizeof(buf)); /* desc */
540 get_str8(pb, mime, sizeof(mime)); /* mimetype */
541 st->codec->codec_type = AVMEDIA_TYPE_DATA;
542 st->priv_data = ff_rm_alloc_rmstream();
543 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
544 avio_rb32(pb), mime) < 0)
547 case MKTAG('D', 'A', 'T', 'A'):
550 /* unknown tag: skip it */
551 avio_skip(pb, tag_size - 10);
556 rm->nb_packets = avio_rb32(pb); /* number of packets */
557 if (!rm->nb_packets && (flags & 4))
558 rm->nb_packets = 3600 * 25;
559 avio_rb32(pb); /* next data header */
562 data_off = avio_tell(pb) - 18;
563 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
564 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
566 avio_seek(pb, data_off + 18, SEEK_SET);
572 static int get_num(AVIOContext *pb, int *len)
584 return (n << 16) | n1;
588 /* multiple of 20 bytes for ra144 (ugly) */
589 #define RAW_PACKET_SIZE 1000
591 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
592 RMDemuxContext *rm = s->priv_data;
593 AVIOContext *pb = s->pb;
595 uint32_t state=0xFFFFFFFF;
597 while(!url_feof(pb)){
599 *pos= avio_tell(pb) - 3;
600 if(rm->remaining_len > 0){
601 num= rm->current_stream;
602 len= rm->remaining_len;
603 *timestamp = AV_NOPTS_VALUE;
606 state= (state<<8) + avio_r8(pb);
608 if(state == MKBETAG('I', 'N', 'D', 'X')){
609 int n_pkts, expected_len;
612 n_pkts = avio_rb32(pb);
613 expected_len = 20 + n_pkts * 14;
615 /* some files don't add index entries to chunk size... */
617 else if (len != expected_len)
618 av_log(s, AV_LOG_WARNING,
619 "Index size %d (%d pkts) is wrong, should be %d.\n",
620 len, n_pkts, expected_len);
621 len -= 14; // we already read part of the index header
625 } else if (state == MKBETAG('D','A','T','A')) {
626 av_log(s, AV_LOG_WARNING,
627 "DATA tag in middle of chunk, file may be broken.\n");
630 if(state > (unsigned)0xFFFF || state <= 12)
636 *timestamp = avio_rb32(pb);
637 avio_r8(pb); /* reserved */
638 *flags = avio_r8(pb); /* flags */
640 for(i=0;i<s->nb_streams;i++) {
645 if (i == s->nb_streams) {
647 /* skip packet if unknown number */
649 rm->remaining_len = 0;
659 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
660 RMDemuxContext *rm, RMStream *vst,
661 AVPacket *pkt, int len, int *pseq,
665 int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
669 hdr = avio_r8(pb); len--;
672 if(type != 3){ // not frame as a part of packet
673 seq = avio_r8(pb); len--;
675 if(type != 1){ // not whole frame
676 len2 = get_num(pb, &len);
677 pos = get_num(pb, &len);
678 pic_num = avio_r8(pb); len--;
682 rm->remaining_len = len;
683 if(type&1){ // frame, not slice
684 if(type == 3){ // frame as a part of packet
688 if(rm->remaining_len < len)
690 rm->remaining_len -= len;
691 if(av_new_packet(pkt, len + 9) < 0)
694 AV_WL32(pkt->data + 1, 1);
695 AV_WL32(pkt->data + 5, 0);
696 if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
698 return ret < 0 ? ret : AVERROR(EIO);
702 //now we have to deal with single slice
705 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
706 if (len2 > ffio_limit(pb, len2)) {
707 av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
708 return AVERROR_INVALIDDATA;
710 vst->slices = ((hdr & 0x3F) << 1) + 1;
711 vst->videobufsize = len2 + 8*vst->slices + 1;
712 av_free_packet(&vst->pkt); //FIXME this should be output.
713 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
714 return AVERROR(ENOMEM);
715 memset(vst->pkt.data, 0, vst->pkt.size);
716 vst->videobufpos = 8*vst->slices + 1;
718 vst->curpic_num = pic_num;
719 vst->pktpos = avio_tell(pb);
722 len = FFMIN(len, pos);
724 if(++vst->cur_slice > vst->slices)
727 return AVERROR(ENOMEM);
728 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
729 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
730 if(vst->videobufpos + len > vst->videobufsize)
732 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
734 vst->videobufpos += len;
735 rm->remaining_len-= len;
737 if (type == 2 || vst->videobufpos == vst->videobufsize) {
738 vst->pkt.data[0] = vst->cur_slice-1;
743 #if FF_API_DESTRUCT_PACKET
744 FF_DISABLE_DEPRECATION_WARNINGS
745 vst->pkt.destruct = NULL;
746 FF_ENABLE_DEPRECATION_WARNINGS
748 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
749 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
750 vst->videobufpos - 1 - 8*vst->slices);
751 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
752 pkt->pts = AV_NOPTS_VALUE;
753 pkt->pos = vst->pktpos;
762 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
767 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
769 for (j=0;j<pkt->size;j+=2) {
770 FFSWAP(int, ptr[0], ptr[1]);
777 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
778 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
779 int *seq, int flags, int64_t timestamp)
781 RMDemuxContext *rm = s->priv_data;
784 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
785 rm->current_stream= st->id;
786 ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp);
788 return ret; //got partial frame or error
789 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
790 if ((ast->deint_id == DEINT_ID_GENR) ||
791 (ast->deint_id == DEINT_ID_INT4) ||
792 (ast->deint_id == DEINT_ID_SIPR)) {
794 int sps = ast->sub_packet_size;
795 int cfs = ast->coded_framesize;
796 int h = ast->sub_packet_h;
797 int y = ast->sub_packet_cnt;
798 int w = ast->audio_framesize;
801 y = ast->sub_packet_cnt = 0;
803 ast->audiotimestamp = timestamp;
805 switch (ast->deint_id) {
807 for (x = 0; x < h/2; x++)
808 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
811 for (x = 0; x < w/sps; x++)
812 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
815 avio_read(pb, ast->pkt.data + y * w, w);
819 if (++(ast->sub_packet_cnt) < h)
821 if (ast->deint_id == DEINT_ID_SIPR)
822 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
824 ast->sub_packet_cnt = 0;
825 rm->audio_stream_num = st->index;
826 rm->audio_pkt_cnt = h * w / st->codec->block_align;
827 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
828 (ast->deint_id == DEINT_ID_VBRS)) {
830 rm->audio_stream_num = st->index;
831 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
832 if (ast->sub_packet_cnt) {
833 for (x = 0; x < ast->sub_packet_cnt; x++)
834 ast->sub_packet_lengths[x] = avio_rb16(pb);
835 rm->audio_pkt_cnt = ast->sub_packet_cnt;
836 ast->audiotimestamp = timestamp;
840 av_get_packet(pb, pkt, len);
841 rm_ac3_swap_bytes(st, pkt);
844 av_get_packet(pb, pkt, len);
846 pkt->stream_index = st->index;
849 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
850 if(st->codec->codec_id == AV_CODEC_ID_RV20){
851 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
852 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
854 seq |= (timestamp&~0x3FFF);
855 if(seq - timestamp > 0x2000) seq -= 0x4000;
856 if(seq - timestamp < -0x2000) seq += 0x4000;
861 pkt->pts = timestamp;
863 pkt->flags |= AV_PKT_FLAG_KEY;
865 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
869 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
870 AVStream *st, RMStream *ast, AVPacket *pkt)
872 RMDemuxContext *rm = s->priv_data;
874 av_assert0 (rm->audio_pkt_cnt > 0);
876 if (ast->deint_id == DEINT_ID_VBRF ||
877 ast->deint_id == DEINT_ID_VBRS)
878 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
880 if(av_new_packet(pkt, st->codec->block_align) < 0)
881 return AVERROR(ENOMEM);
882 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
883 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
884 st->codec->block_align);
887 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
888 ast->audiotimestamp = AV_NOPTS_VALUE;
889 pkt->flags = AV_PKT_FLAG_KEY;
892 pkt->stream_index = st->index;
894 return rm->audio_pkt_cnt;
897 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
899 RMDemuxContext *rm = s->priv_data;
900 AVStream *st = NULL; // init to silence compiler warning
901 int i, len, res, seq = 1;
902 int64_t timestamp, pos;
906 if (rm->audio_pkt_cnt) {
907 // If there are queued audio packet return them first
908 st = s->streams[rm->audio_stream_num];
909 res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
914 if (rm->old_format) {
919 timestamp = AV_NOPTS_VALUE;
920 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
921 ast->coded_framesize * ast->sub_packet_h / 2;
922 flags = (seq++ == 1) ? 2 : 0;
923 pos = avio_tell(s->pb);
925 len=sync(s, ×tamp, &flags, &i, &pos);
930 if(len<0 || url_feof(s->pb))
933 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
934 &seq, flags, timestamp);
937 if((flags&2) && (seq&0x7F) == 1)
938 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
943 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
944 || st->discard >= AVDISCARD_ALL){
953 static int rm_read_close(AVFormatContext *s)
957 for (i=0;i<s->nb_streams;i++)
958 ff_rm_free_rmstream(s->streams[i]->priv_data);
963 static int rm_probe(AVProbeData *p)
965 /* check file header */
966 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
967 p->buf[2] == 'M' && p->buf[3] == 'F' &&
968 p->buf[4] == 0 && p->buf[5] == 0) ||
969 (p->buf[0] == '.' && p->buf[1] == 'r' &&
970 p->buf[2] == 'a' && p->buf[3] == 0xfd))
971 return AVPROBE_SCORE_MAX;
976 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
977 int64_t *ppos, int64_t pos_limit)
979 RMDemuxContext *rm = s->priv_data;
981 int stream_index2, flags, len, h;
986 return AV_NOPTS_VALUE;
988 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
989 return AV_NOPTS_VALUE;
996 len=sync(s, &dts, &flags, &stream_index2, &pos);
998 return AV_NOPTS_VALUE;
1000 st = s->streams[stream_index2];
1001 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1002 h= avio_r8(s->pb); len--;
1004 seq = avio_r8(s->pb); len--;
1008 if((flags&2) && (seq&0x7F) == 1){
1009 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
1010 flags, stream_index2, stream_index, dts, seq);
1011 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1012 if(stream_index2 == stream_index)
1016 avio_skip(s->pb, len);
1022 static int rm_read_seek(AVFormatContext *s, int stream_index,
1023 int64_t pts, int flags)
1025 RMDemuxContext *rm = s->priv_data;
1027 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1029 rm->audio_pkt_cnt = 0;
1034 AVInputFormat ff_rm_demuxer = {
1036 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
1037 .priv_data_size = sizeof(RMDemuxContext),
1038 .read_probe = rm_probe,
1039 .read_header = rm_read_header,
1040 .read_packet = rm_read_packet,
1041 .read_close = rm_read_close,
1042 .read_timestamp = rm_read_dts,
1043 .read_seek = rm_read_seek,
1046 AVInputFormat ff_rdt_demuxer = {
1048 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
1049 .priv_data_size = sizeof(RMDemuxContext),
1050 .read_close = rm_read_close,
1051 .flags = AVFMT_NOFILE,