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;
55 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
56 ast->codec->channels = 1;
57 ast->codec->sample_rate = 8000;
58 ast->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
59 avpriv_set_pts_info(ast, 64, 1, 8000);
61 avio_seek(s->pb, FIRST, SEEK_SET);
66 static const uint8_t header[24] = {
67 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1e,
68 0xa6, 0x80, 0xb0, 0x7e, 0x40, 0x00, 0x00, 0x00,
69 0x01, 0x68, 0xce, 0x38, 0x80, 0x00, 0x00, 0x00
72 static int sdr2_read_packet(AVFormatContext *s, AVPacket *pkt)
76 int flags, ret = 0, is_video;
78 pos = avio_tell(s->pb);
80 flags = avio_rl32(s->pb);
83 next = avio_rl32(s->pb);
85 return AVERROR_INVALIDDATA;
88 is_video = avio_rl32(s->pb);
92 if (av_new_packet(pkt, next - 52 + 24) < 0)
93 return AVERROR(ENOMEM);
94 memcpy(pkt->data, header, 24);
95 ret = avio_read(s->pb, pkt->data + 24, next - 52);
100 av_shrink_packet(pkt, ret + 24);
102 ret = av_get_packet(s->pb, pkt, next - 52);
104 pkt->stream_index = !!is_video;
106 if (flags & (1 << 12))
107 pkt->flags |= AV_PKT_FLAG_KEY;
112 AVInputFormat ff_sdr2_demuxer = {
114 .long_name = NULL_IF_CONFIG_SMALL("SDR2"),
115 .read_probe = sdr2_probe,
116 .read_header = sdr2_read_header,
117 .read_packet = sdr2_read_packet,
118 .extensions = "sdr2",
119 .flags = AVFMT_GENERIC_INDEX,