3 * Copyright (c) 2017 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/avstring.h"
23 #include "libavutil/intreadwrite.h"
28 static int sdx_probe(AVProbeData *p)
30 if (AV_RB32(p->buf) == AV_RB32("SDX:"))
31 return AVPROBE_SCORE_EXTENSION;
35 static int sdx_read_header(AVFormatContext *s)
41 while (!avio_feof(s->pb)) {
42 if (avio_r8(s->pb) == 0x1a)
45 if (avio_r8(s->pb) != 1)
46 return AVERROR_INVALIDDATA;
47 length = avio_r8(s->pb);
48 avio_skip(s->pb, length);
50 depth = avio_r8(s->pb);
52 st = avformat_new_stream(s, NULL);
54 return AVERROR(ENOMEM);
56 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
57 st->codecpar->channels = 1;
58 st->codecpar->sample_rate = avio_rl32(s->pb);
61 st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
64 st->codecpar->codec_id = AV_CODEC_ID_PCM_U16LE;
67 st->codecpar->codec_id = AV_CODEC_ID_PCM_U24LE;
70 st->codecpar->codec_id = AV_CODEC_ID_PCM_U32LE;
73 return AVERROR_INVALIDDATA;
76 st->codecpar->block_align = depth / 8;
81 AVInputFormat ff_sdx_demuxer = {
83 .long_name = NULL_IF_CONFIG_SMALL("Sample Dump eXchange"),
84 .read_probe = sdx_probe,
85 .read_header = sdx_read_header,
86 .read_packet = ff_pcm_read_packet,
87 .read_seek = ff_pcm_read_seek,
89 .flags = AVFMT_GENERIC_INDEX,