mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
b800327f4c
This commit does for AVInputFormat what commit59c9dc82f4did for AVOutputFormat: It adds a new type FFInputFormat, moves all the internals of AVInputFormat to it and adds a now reduced AVInputFormat as first member. This does not affect/improve extensibility of both public or private fields for demuxers (it is still a mess due to lavd). This is possible since50f34172e0(which removed the last usage of an internal field of AVInputFormat in fftools). (Hint: tools/probetest.c accesses the internals of FFInputFormat as well, but given that it is a testing tool this is not considered a problem.) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*
|
|
* SDX demuxer
|
|
* Copyright (c) 2017 Paul B Mahol
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "demux.h"
|
|
#include "internal.h"
|
|
#include "pcm.h"
|
|
|
|
static int sdx_probe(const AVProbeData *p)
|
|
{
|
|
if (AV_RB32(p->buf) == AV_RB32("SDX:"))
|
|
return AVPROBE_SCORE_EXTENSION;
|
|
return 0;
|
|
}
|
|
|
|
static int sdx_read_header(AVFormatContext *s)
|
|
{
|
|
AVStream *st;
|
|
int depth, length;
|
|
|
|
avio_skip(s->pb, 4);
|
|
while (!avio_feof(s->pb)) {
|
|
if (avio_r8(s->pb) == 0x1a)
|
|
break;
|
|
}
|
|
if (avio_r8(s->pb) != 1)
|
|
return AVERROR_INVALIDDATA;
|
|
length = avio_r8(s->pb);
|
|
avio_skip(s->pb, length);
|
|
avio_skip(s->pb, 4);
|
|
depth = avio_r8(s->pb);
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->ch_layout.nb_channels = 1;
|
|
st->codecpar->sample_rate = avio_rl32(s->pb);
|
|
switch (depth) {
|
|
case 8:
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
|
|
break;
|
|
case 16:
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_U16LE;
|
|
break;
|
|
case 24:
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_U24LE;
|
|
break;
|
|
case 32:
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_U32LE;
|
|
break;
|
|
default:
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_skip(s->pb, 16);
|
|
st->codecpar->block_align = depth / 8;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const FFInputFormat ff_sdx_demuxer = {
|
|
.p.name = "sdx",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("Sample Dump eXchange"),
|
|
.p.extensions = "sdx",
|
|
.p.flags = AVFMT_GENERIC_INDEX,
|
|
.read_probe = sdx_probe,
|
|
.read_header = sdx_read_header,
|
|
.read_packet = ff_pcm_read_packet,
|
|
.read_seek = ff_pcm_read_seek,
|
|
};
|