mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +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>
119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
/*
|
|
* OSQ demuxer
|
|
* Copyright (c) 2023 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/intreadwrite.h"
|
|
#include "avio_internal.h"
|
|
#include "avformat.h"
|
|
#include "demux.h"
|
|
#include "internal.h"
|
|
#include "rawdec.h"
|
|
|
|
static int osq_probe(const AVProbeData *p)
|
|
{
|
|
if (AV_RL32(p->buf) != MKTAG('O','S','Q',' '))
|
|
return 0;
|
|
if (AV_RL32(p->buf + 4) != 48)
|
|
return 0;
|
|
if (AV_RL16(p->buf + 8) != 1)
|
|
return 0;
|
|
if (p->buf[10] == 0)
|
|
return 0;
|
|
if (p->buf[11] == 0)
|
|
return 0;
|
|
if (AV_RL32(p->buf + 12) == 0)
|
|
return 0;
|
|
if (AV_RL16(p->buf + 16) == 0)
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static int osq_read_header(AVFormatContext *s)
|
|
{
|
|
uint32_t t, size;
|
|
AVStream *st;
|
|
int ret;
|
|
|
|
t = avio_rl32(s->pb);
|
|
if (t != MKTAG('O','S','Q',' '))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
size = avio_rl32(s->pb);
|
|
if (size != 48)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
if ((ret = ff_get_extradata(s, st->codecpar, s->pb, size)) < 0)
|
|
return ret;
|
|
|
|
t = avio_rl32(s->pb);
|
|
if (t != MKTAG('R','I','F','F'))
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(s->pb, 8);
|
|
|
|
t = avio_rl32(s->pb);
|
|
if (t != MKTAG('f','m','t',' '))
|
|
return AVERROR_INVALIDDATA;
|
|
size = avio_rl32(s->pb);
|
|
avio_skip(s->pb, size);
|
|
|
|
t = avio_rl32(s->pb);
|
|
size = avio_rl32(s->pb);
|
|
while (t != MKTAG('d','a','t','a')) {
|
|
avio_skip(s->pb, size);
|
|
|
|
t = avio_rl32(s->pb);
|
|
size = avio_rl32(s->pb);
|
|
if (avio_feof(s->pb))
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_OSQ;
|
|
st->codecpar->sample_rate = AV_RL32(st->codecpar->extradata + 4);
|
|
if (st->codecpar->sample_rate <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
st->codecpar->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
|
|
st->codecpar->ch_layout.nb_channels = st->codecpar->extradata[3];
|
|
if (st->codecpar->ch_layout.nb_channels == 0)
|
|
return AVERROR_INVALIDDATA;
|
|
st->start_time = 0;
|
|
st->duration = AV_RL32(st->codecpar->extradata + 16);
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const FFInputFormat ff_osq_demuxer = {
|
|
.p.name = "osq",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("raw OSQ"),
|
|
.p.extensions = "osq",
|
|
.p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,
|
|
.p.priv_class = &ff_raw_demuxer_class,
|
|
.read_probe = osq_probe,
|
|
.read_header = osq_read_header,
|
|
.read_packet = ff_raw_read_partial_packet,
|
|
.raw_codec_id = AV_CODEC_ID_OSQ,
|
|
.priv_data_size = sizeof(FFRawDemuxerContext),
|
|
};
|