mirror of
https://github.com/librempeg/librempeg
synced 2024-11-22 18:49:58 +00:00
aab2db9229
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> Signed-off-by: Paul B Mahol <onemda@gmail.com>
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
|
|
* SDR2 demuxer
|
|
* Copyright (c) 2014 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 "avformat.h"
|
|
#include "demux.h"
|
|
#include "internal.h"
|
|
|
|
static int sdr2_probe(const AVProbeData *p)
|
|
{
|
|
if (AV_RL32(p->buf) != MKTAG('S', 'R', 'A', 1))
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_EXTENSION;
|
|
}
|
|
|
|
#define FIRST 0xA8
|
|
|
|
static int sdr2_read_header(AVFormatContext *s)
|
|
{
|
|
AVStream *st, *ast;
|
|
|
|
ast = avformat_new_stream(s, 0);
|
|
if (!ast)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st = avformat_new_stream(s, 0);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
avio_skip(s->pb, 20);
|
|
avpriv_set_pts_info(st, 64, 1, avio_rl32(s->pb));
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codecpar->width = avio_rl32(s->pb);
|
|
st->codecpar->height = avio_rl32(s->pb);
|
|
st->codecpar->codec_id = AV_CODEC_ID_H264;
|
|
ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
|
|
|
|
ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
ast->codecpar->ch_layout.nb_channels = 1;
|
|
ast->codecpar->sample_rate = 8000;
|
|
ast->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
|
|
avpriv_set_pts_info(ast, 64, 1, 8000);
|
|
|
|
avio_seek(s->pb, FIRST, SEEK_SET);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const uint8_t header[24] = {
|
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1e,
|
|
0xa6, 0x80, 0xb0, 0x7e, 0x40, 0x00, 0x00, 0x00,
|
|
0x01, 0x68, 0xce, 0x38, 0x80, 0x00, 0x00, 0x00
|
|
};
|
|
|
|
static int sdr2_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int64_t pos;
|
|
unsigned next;
|
|
int flags, ret = 0, is_video;
|
|
|
|
pos = avio_tell(s->pb);
|
|
|
|
flags = avio_rl32(s->pb);
|
|
avio_skip(s->pb, 4);
|
|
|
|
next = avio_rl32(s->pb);
|
|
if (next <= 52)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_skip(s->pb, 6);
|
|
is_video = avio_rl32(s->pb);
|
|
avio_skip(s->pb, 30);
|
|
|
|
if (pos == FIRST) {
|
|
if ((ret = av_new_packet(pkt, next - 52 + 24)) < 0)
|
|
return ret;
|
|
memcpy(pkt->data, header, 24);
|
|
ret = avio_read(s->pb, pkt->data + 24, next - 52);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
av_shrink_packet(pkt, ret + 24);
|
|
} else {
|
|
ret = av_get_packet(s->pb, pkt, next - 52);
|
|
}
|
|
pkt->stream_index = !!is_video;
|
|
pkt->pos = pos;
|
|
if (flags & (1 << 12))
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
|
|
return ret;
|
|
}
|
|
|
|
const FFInputFormat ff_sdr2_demuxer = {
|
|
.p.name = "sdr2",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("SDR2"),
|
|
.p.extensions= "sdr2",
|
|
.p.flags = AVFMT_GENERIC_INDEX,
|
|
.read_probe = sdr2_probe,
|
|
.read_header = sdr2_read_header,
|
|
.read_packet = sdr2_read_packet,
|
|
};
|