3 * Copyright (c) 2014 Paul B Mahol
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/intreadwrite.h"
26 static int sdr2_probe(AVProbeData
*p
)
28 if (AV_RL32(p
->buf
) != MKTAG('S', 'R', 'A', 1))
31 return AVPROBE_SCORE_EXTENSION
;
36 static int sdr2_read_header(AVFormatContext
*s
)
40 ast
= avformat_new_stream(s
, 0);
42 return AVERROR(ENOMEM
);
44 st
= avformat_new_stream(s
, 0);
46 return AVERROR(ENOMEM
);
49 avpriv_set_pts_info(st
, 64, 1, avio_rl32(s
->pb
));
50 st
->codec
->codec_type
= AVMEDIA_TYPE_VIDEO
;
51 st
->codec
->width
= avio_rl32(s
->pb
);
52 st
->codec
->height
= avio_rl32(s
->pb
);
53 st
->codec
->codec_id
= AV_CODEC_ID_H264
;
54 st
->need_parsing
= AVSTREAM_PARSE_FULL
;
56 ast
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
57 ast
->codec
->channels
= 1;
58 ast
->codec
->sample_rate
= 8000;
59 ast
->codec
->codec_id
= AV_CODEC_ID_PCM_S16LE
;
60 avpriv_set_pts_info(ast
, 64, 1, 8000);
62 avio_seek(s
->pb
, FIRST
, SEEK_SET
);
67 static const uint8_t header
[24] = {
68 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1e,
69 0xa6, 0x80, 0xb0, 0x7e, 0x40, 0x00, 0x00, 0x00,
70 0x01, 0x68, 0xce, 0x38, 0x80, 0x00, 0x00, 0x00
73 static int sdr2_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
77 int flags
, ret
= 0, is_video
;
79 pos
= avio_tell(s
->pb
);
81 flags
= avio_rl32(s
->pb
);
84 next
= avio_rl32(s
->pb
);
86 return AVERROR_INVALIDDATA
;
89 is_video
= avio_rl32(s
->pb
);
93 if (av_new_packet(pkt
, next
- 52 + 24) < 0)
94 return AVERROR(ENOMEM
);
95 memcpy(pkt
->data
, header
, 24);
96 ret
= avio_read(s
->pb
, pkt
->data
+ 24, next
- 52);
101 av_shrink_packet(pkt
, ret
+ 24);
103 ret
= av_get_packet(s
->pb
, pkt
, next
- 52);
105 pkt
->stream_index
= !!is_video
;
107 if (flags
& (1 << 12))
108 pkt
->flags
|= AV_PKT_FLAG_KEY
;
113 AVInputFormat ff_sdr2_demuxer
= {
115 .long_name
= NULL_IF_CONFIG_SMALL("SDR2"),
116 .read_probe
= sdr2_probe
,
117 .read_header
= sdr2_read_header
,
118 .read_packet
= sdr2_read_packet
,
119 .extensions
= "sdr2",
120 .flags
= AVFMT_GENERIC_INDEX
,