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/avstring.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/dict.h"
29 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac
30 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
31 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
32 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
33 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
34 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
37 AVPacket pkt; ///< place to store merged video frame / reordered audio data
38 int videobufsize; ///< current assembled frame size
39 int videobufpos; ///< position for the next slice in the video buffer
40 int curpic_num; ///< picture number of current frame
41 int cur_slice, slices;
42 int64_t pktpos; ///< first slice position in file
43 /// Audio descrambling matrix parameters
44 int64_t audiotimestamp; ///< Audio packet timestamp
45 int sub_packet_cnt; // Subpacket counter, used while reading
46 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
47 int audio_framesize; /// Audio frame size from container
48 int sub_packet_lengths[16]; /// Length of each subpacket
49 int32_t deint_id; ///< deinterleaver used in audio stream
57 int audio_stream_num; ///< Stream number for audio packets
58 int audio_pkt_cnt; ///< Output packet counter
61 static const unsigned char sipr_swaps[38][2] = {
62 { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
63 { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
64 { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
65 { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
66 { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
67 { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
68 { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
69 { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
70 { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
71 { 67, 83 }, { 77, 80 }
74 const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
76 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
87 if (buf_size > 0) *q = '\0';
90 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
92 get_strl(pb, buf, buf_size, avio_r8(pb));
95 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
99 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
100 if (!avctx->extradata)
101 return AVERROR(ENOMEM);
102 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
103 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
104 if (avctx->extradata_size != size)
109 static void rm_read_metadata(AVFormatContext *s, int wide)
113 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
114 int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb);
115 get_strl(s->pb, buf, sizeof(buf), len);
116 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
120 RMStream *ff_rm_alloc_rmstream (void)
122 RMStream *rms = av_mallocz(sizeof(RMStream));
123 rms->curpic_num = -1;
127 void ff_rm_free_rmstream (RMStream *rms)
129 av_free_packet(&rms->pkt);
132 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
133 AVStream *st, RMStream *ast, int read_all)
140 version = avio_rb16(pb); /* version */
142 int header_size = avio_rb16(pb);
143 int64_t startpos = avio_tell(pb);
145 rm_read_metadata(s, 0);
146 if ((startpos + header_size) >= avio_tell(pb) + 2) {
147 // fourcc (should always be "lpcJ")
149 get_str8(pb, buf, sizeof(buf));
151 // Skip extra header crap (this should never happen)
152 if ((startpos + header_size) > avio_tell(pb))
153 avio_skip(pb, header_size + startpos - avio_tell(pb));
154 st->codec->sample_rate = 8000;
155 st->codec->channels = 1;
156 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
157 st->codec->codec_id = CODEC_ID_RA_144;
158 ast->deint_id = DEINT_ID_INT0;
160 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
161 int codecdata_length;
162 /* old version (4) */
163 avio_skip(pb, 2); /* unused */
164 avio_rb32(pb); /* .ra4 */
165 avio_rb32(pb); /* data size */
166 avio_rb16(pb); /* version2 */
167 avio_rb32(pb); /* header size */
168 flavor= avio_rb16(pb); /* add codec info / flavor */
169 ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
170 avio_rb32(pb); /* ??? */
171 avio_rb32(pb); /* ??? */
172 avio_rb32(pb); /* ??? */
173 ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
174 st->codec->block_align= avio_rb16(pb); /* frame size */
175 ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
176 avio_rb16(pb); /* ??? */
178 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
180 st->codec->sample_rate = avio_rb16(pb);
182 st->codec->channels = avio_rb16(pb);
184 ast->deint_id = avio_rl32(pb);
185 avio_read(pb, buf, 4);
188 get_str8(pb, buf, sizeof(buf)); /* desc */
189 ast->deint_id = AV_RL32(buf);
190 get_str8(pb, buf, sizeof(buf)); /* desc */
192 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
193 st->codec->codec_tag = AV_RL32(buf);
194 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
195 st->codec->codec_tag);
197 switch (ast->deint_id) {
206 av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
207 return AVERROR_INVALIDDATA;
209 switch (st->codec->codec_id) {
211 st->need_parsing = AVSTREAM_PARSE_FULL;
213 case CODEC_ID_RA_288:
214 st->codec->extradata_size= 0;
215 ast->audio_framesize = st->codec->block_align;
216 st->codec->block_align = coded_framesize;
218 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
219 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
223 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
226 case CODEC_ID_ATRAC3:
228 avio_rb16(pb); avio_r8(pb);
231 codecdata_length = avio_rb32(pb);
232 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
233 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
237 ast->audio_framesize = st->codec->block_align;
238 if (st->codec->codec_id == CODEC_ID_SIPR) {
240 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
244 st->codec->block_align = ff_sipr_subpk_size[flavor];
246 if(sub_packet_size <= 0){
247 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
250 st->codec->block_align = ast->sub_packet_size;
252 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
255 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
256 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
260 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
263 avio_rb16(pb); avio_r8(pb);
266 codecdata_length = avio_rb32(pb);
267 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
268 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
271 if (codecdata_length >= 1) {
273 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
278 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
284 rm_read_metadata(s, 0);
291 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
292 AVStream *st, RMStream *rst, int codec_data_size)
299 av_set_pts_info(st, 64, 1, 1000);
300 codec_pos = avio_tell(pb);
302 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
304 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
308 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
310 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
313 st->codec->codec_tag = avio_rl32(pb);
314 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
315 st->codec->codec_tag);
316 // av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
317 if (st->codec->codec_id == CODEC_ID_NONE)
319 st->codec->width = avio_rb16(pb);
320 st->codec->height = avio_rb16(pb);
321 avio_skip(pb, 2); // looks like bits per sample
322 avio_skip(pb, 4); // always zero?
323 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
324 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
327 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
330 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
331 0x10000, fps, (1 << 30) - 1);
332 st->avg_frame_rate.num = st->codec->time_base.den;
333 st->avg_frame_rate.den = st->codec->time_base.num;
337 /* skip codec info */
338 size = avio_tell(pb) - codec_pos;
339 avio_skip(pb, codec_data_size - size);
344 /** this function assumes that the demuxer has already seeked to the start
345 * of the INDX chunk, and will bail out if not. */
346 static int rm_read_index(AVFormatContext *s)
348 AVIOContext *pb = s->pb;
349 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
353 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
355 size = avio_rb32(pb);
359 n_pkts = avio_rb32(pb);
360 str_id = avio_rb16(pb);
361 next_off = avio_rb32(pb);
362 for (n = 0; n < s->nb_streams; n++)
363 if (s->streams[n]->id == str_id) {
367 if (n == s->nb_streams)
370 for (n = 0; n < n_pkts; n++) {
374 avio_skip(pb, 4); /* packet no. */
376 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
380 if (next_off && avio_tell(pb) != next_off &&
381 avio_seek(pb, next_off, SEEK_SET) < 0)
388 static int rm_read_header_old(AVFormatContext *s)
390 RMDemuxContext *rm = s->priv_data;
394 st = av_new_stream(s, 0);
397 st->priv_data = ff_rm_alloc_rmstream();
398 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
401 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
403 RMDemuxContext *rm = s->priv_data;
405 AVIOContext *pb = s->pb;
408 unsigned int start_time, duration;
409 unsigned int data_off = 0, indx_off = 0;
414 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
415 /* very old .ra format */
416 return rm_read_header_old(s);
417 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
421 avio_rb32(pb); /* header size */
424 avio_rb32(pb); /* number of headers */
430 tag_size = avio_rb32(pb);
433 printf("tag=%c%c%c%c (%08x) size=%d\n",
441 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
444 case MKTAG('P', 'R', 'O', 'P'):
446 avio_rb32(pb); /* max bit rate */
447 avio_rb32(pb); /* avg bit rate */
448 avio_rb32(pb); /* max packet size */
449 avio_rb32(pb); /* avg packet size */
450 avio_rb32(pb); /* nb packets */
451 avio_rb32(pb); /* duration */
452 avio_rb32(pb); /* preroll */
453 indx_off = avio_rb32(pb); /* index offset */
454 data_off = avio_rb32(pb); /* data offset */
455 avio_rb16(pb); /* nb streams */
456 flags = avio_rb16(pb); /* flags */
458 case MKTAG('C', 'O', 'N', 'T'):
459 rm_read_metadata(s, 1);
461 case MKTAG('M', 'D', 'P', 'R'):
462 st = av_new_stream(s, 0);
464 return AVERROR(ENOMEM);
465 st->id = avio_rb16(pb);
466 avio_rb32(pb); /* max bit rate */
467 st->codec->bit_rate = avio_rb32(pb); /* bit rate */
468 avio_rb32(pb); /* max packet size */
469 avio_rb32(pb); /* avg packet size */
470 start_time = avio_rb32(pb); /* start time */
471 avio_rb32(pb); /* preroll */
472 duration = avio_rb32(pb); /* duration */
473 st->start_time = start_time;
474 st->duration = duration;
475 get_str8(pb, buf, sizeof(buf)); /* desc */
476 get_str8(pb, buf, sizeof(buf)); /* mimetype */
477 st->codec->codec_type = AVMEDIA_TYPE_DATA;
478 st->priv_data = ff_rm_alloc_rmstream();
479 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
483 case MKTAG('D', 'A', 'T', 'A'):
486 /* unknown tag: skip it */
487 avio_skip(pb, tag_size - 10);
492 rm->nb_packets = avio_rb32(pb); /* number of packets */
493 if (!rm->nb_packets && (flags & 4))
494 rm->nb_packets = 3600 * 25;
495 avio_rb32(pb); /* next data header */
498 data_off = avio_tell(pb) - 18;
499 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
500 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
502 avio_seek(pb, data_off + 18, SEEK_SET);
508 static int get_num(AVIOContext *pb, int *len)
520 return (n << 16) | n1;
524 /* multiple of 20 bytes for ra144 (ugly) */
525 #define RAW_PACKET_SIZE 1000
527 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
528 RMDemuxContext *rm = s->priv_data;
529 AVIOContext *pb = s->pb;
531 uint32_t state=0xFFFFFFFF;
533 while(!url_feof(pb)){
535 *pos= avio_tell(pb) - 3;
536 if(rm->remaining_len > 0){
537 num= rm->current_stream;
538 len= rm->remaining_len;
539 *timestamp = AV_NOPTS_VALUE;
542 state= (state<<8) + avio_r8(pb);
544 if(state == MKBETAG('I', 'N', 'D', 'X')){
545 int n_pkts, expected_len;
548 n_pkts = avio_rb32(pb);
549 expected_len = 20 + n_pkts * 14;
551 /* some files don't add index entries to chunk size... */
553 else if (len != expected_len)
554 av_log(s, AV_LOG_WARNING,
555 "Index size %d (%d pkts) is wrong, should be %d.\n",
556 len, n_pkts, expected_len);
557 len -= 14; // we already read part of the index header
561 } else if (state == MKBETAG('D','A','T','A')) {
562 av_log(s, AV_LOG_WARNING,
563 "DATA tag in middle of chunk, file may be broken.\n");
566 if(state > (unsigned)0xFFFF || state <= 12)
572 *timestamp = avio_rb32(pb);
573 avio_r8(pb); /* reserved */
574 *flags = avio_r8(pb); /* flags */
576 for(i=0;i<s->nb_streams;i++) {
581 if (i == s->nb_streams) {
583 /* skip packet if unknown number */
585 rm->remaining_len = 0;
595 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
596 RMDemuxContext *rm, RMStream *vst,
597 AVPacket *pkt, int len, int *pseq,
600 int hdr, seq, pic_num, len2, pos;
603 hdr = avio_r8(pb); len--;
606 if(type != 3){ // not frame as a part of packet
607 seq = avio_r8(pb); len--;
609 if(type != 1){ // not whole frame
610 len2 = get_num(pb, &len);
611 pos = get_num(pb, &len);
612 pic_num = avio_r8(pb); len--;
616 rm->remaining_len = len;
617 if(type&1){ // frame, not slice
618 if(type == 3){ // frame as a part of packet
622 if(rm->remaining_len < len)
624 rm->remaining_len -= len;
625 if(av_new_packet(pkt, len + 9) < 0)
628 AV_WL32(pkt->data + 1, 1);
629 AV_WL32(pkt->data + 5, 0);
630 avio_read(pb, pkt->data + 9, len);
633 //now we have to deal with single slice
636 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
637 vst->slices = ((hdr & 0x3F) << 1) + 1;
638 vst->videobufsize = len2 + 8*vst->slices + 1;
639 av_free_packet(&vst->pkt); //FIXME this should be output.
640 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
641 return AVERROR(ENOMEM);
642 vst->videobufpos = 8*vst->slices + 1;
644 vst->curpic_num = pic_num;
645 vst->pktpos = avio_tell(pb);
648 len = FFMIN(len, pos);
650 if(++vst->cur_slice > vst->slices)
652 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
653 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
654 if(vst->videobufpos + len > vst->videobufsize)
656 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
658 vst->videobufpos += len;
659 rm->remaining_len-= len;
661 if(type == 2 || (vst->videobufpos) == vst->videobufsize){
662 vst->pkt.data[0] = vst->cur_slice-1;
666 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
667 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
668 vst->videobufpos - 1 - 8*vst->slices);
669 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
670 pkt->pts = AV_NOPTS_VALUE;
671 pkt->pos = vst->pktpos;
680 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
685 if (st->codec->codec_id == CODEC_ID_AC3) {
687 for (j=0;j<pkt->size;j+=2) {
688 FFSWAP(int, ptr[0], ptr[1]);
695 * Perform 4-bit block reordering for SIPR data.
696 * @todo This can be optimized, e.g. use memcpy() if data blocks are aligned
698 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
700 int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket
702 for (n = 0; n < 38; n++) {
704 int i = bs * sipr_swaps[n][0];
705 int o = bs * sipr_swaps[n][1];
707 /* swap 4bit-nibbles of block 'i' with 'o' */
708 for (j = 0; j < bs; j++, i++, o++) {
709 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
710 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
712 buf[o >> 1] = (x << (4 * (o & 1))) |
713 (buf[o >> 1] & (0xF << (4 * !(o & 1))));
714 buf[i >> 1] = (y << (4 * (i & 1))) |
715 (buf[i >> 1] & (0xF << (4 * !(i & 1))));
721 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
722 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
723 int *seq, int flags, int64_t timestamp)
725 RMDemuxContext *rm = s->priv_data;
727 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
728 rm->current_stream= st->id;
729 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
730 return -1; //got partial frame
731 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
732 if ((ast->deint_id == DEINT_ID_GENR) ||
733 (ast->deint_id == DEINT_ID_INT4) ||
734 (ast->deint_id == DEINT_ID_SIPR)) {
736 int sps = ast->sub_packet_size;
737 int cfs = ast->coded_framesize;
738 int h = ast->sub_packet_h;
739 int y = ast->sub_packet_cnt;
740 int w = ast->audio_framesize;
743 y = ast->sub_packet_cnt = 0;
745 ast->audiotimestamp = timestamp;
747 switch (ast->deint_id) {
749 for (x = 0; x < h/2; x++)
750 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
753 for (x = 0; x < w/sps; x++)
754 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
757 avio_read(pb, ast->pkt.data + y * w, w);
761 if (++(ast->sub_packet_cnt) < h)
763 if (ast->deint_id == DEINT_ID_SIPR)
764 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
766 ast->sub_packet_cnt = 0;
767 rm->audio_stream_num = st->index;
768 rm->audio_pkt_cnt = h * w / st->codec->block_align;
769 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
770 (ast->deint_id == DEINT_ID_VBRS)) {
772 rm->audio_stream_num = st->index;
773 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
774 if (ast->sub_packet_cnt) {
775 for (x = 0; x < ast->sub_packet_cnt; x++)
776 ast->sub_packet_lengths[x] = avio_rb16(pb);
777 rm->audio_pkt_cnt = ast->sub_packet_cnt;
778 ast->audiotimestamp = timestamp;
782 av_get_packet(pb, pkt, len);
783 rm_ac3_swap_bytes(st, pkt);
786 av_get_packet(pb, pkt, len);
788 pkt->stream_index = st->index;
791 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
792 if(st->codec->codec_id == CODEC_ID_RV20){
793 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
794 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
796 seq |= (timestamp&~0x3FFF);
797 if(seq - timestamp > 0x2000) seq -= 0x4000;
798 if(seq - timestamp < -0x2000) seq += 0x4000;
803 pkt->pts = timestamp;
805 pkt->flags |= AV_PKT_FLAG_KEY;
807 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
811 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
812 AVStream *st, RMStream *ast, AVPacket *pkt)
814 RMDemuxContext *rm = s->priv_data;
816 assert (rm->audio_pkt_cnt > 0);
818 if (st->codec->codec_id == CODEC_ID_AAC)
819 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
821 av_new_packet(pkt, st->codec->block_align);
822 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
823 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
824 st->codec->block_align);
827 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
828 ast->audiotimestamp = AV_NOPTS_VALUE;
829 pkt->flags = AV_PKT_FLAG_KEY;
832 pkt->stream_index = st->index;
834 return rm->audio_pkt_cnt;
837 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
839 RMDemuxContext *rm = s->priv_data;
841 int i, len, res, seq = 1;
842 int64_t timestamp, pos;
846 if (rm->audio_pkt_cnt) {
847 // If there are queued audio packet return them first
848 st = s->streams[rm->audio_stream_num];
849 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
852 if (rm->old_format) {
857 timestamp = AV_NOPTS_VALUE;
858 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
859 ast->coded_framesize * ast->sub_packet_h / 2;
860 flags = (seq++ == 1) ? 2 : 0;
861 pos = avio_tell(s->pb);
863 len=sync(s, ×tamp, &flags, &i, &pos);
868 if(len<0 || url_feof(s->pb))
871 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
872 &seq, flags, timestamp);
873 if((flags&2) && (seq&0x7F) == 1)
874 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
879 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
880 || st->discard >= AVDISCARD_ALL){
889 static int rm_read_close(AVFormatContext *s)
893 for (i=0;i<s->nb_streams;i++)
894 ff_rm_free_rmstream(s->streams[i]->priv_data);
899 static int rm_probe(AVProbeData *p)
901 /* check file header */
902 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
903 p->buf[2] == 'M' && p->buf[3] == 'F' &&
904 p->buf[4] == 0 && p->buf[5] == 0) ||
905 (p->buf[0] == '.' && p->buf[1] == 'r' &&
906 p->buf[2] == 'a' && p->buf[3] == 0xfd))
907 return AVPROBE_SCORE_MAX;
912 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
913 int64_t *ppos, int64_t pos_limit)
915 RMDemuxContext *rm = s->priv_data;
917 int stream_index2, flags, len, h;
922 return AV_NOPTS_VALUE;
924 avio_seek(s->pb, pos, SEEK_SET);
930 len=sync(s, &dts, &flags, &stream_index2, &pos);
932 return AV_NOPTS_VALUE;
934 st = s->streams[stream_index2];
935 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
936 h= avio_r8(s->pb); len--;
938 seq = avio_r8(s->pb); len--;
942 if((flags&2) && (seq&0x7F) == 1){
943 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
944 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
945 if(stream_index2 == stream_index)
949 avio_skip(s->pb, len);
955 AVInputFormat ff_rm_demuxer = {
957 .long_name = NULL_IF_CONFIG_SMALL("RealMedia format"),
958 .priv_data_size = sizeof(RMDemuxContext),
959 .read_probe = rm_probe,
960 .read_header = rm_read_header,
961 .read_packet = rm_read_packet,
962 .read_close = rm_read_close,
963 .read_timestamp = rm_read_dts,
966 AVInputFormat ff_rdt_demuxer = {
968 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
969 .priv_data_size = sizeof(RMDemuxContext),
970 .read_close = rm_read_close,