b800327f4c
This commit does for AVInputFormat what commit 59c9dc82f450638a3068deeb1db5c56f6d155752 did 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 since 50f34172e0cca2cabc5836308ec66dbf93f5f2a3 (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>
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/*
|
|
* ADP demuxer
|
|
* Copyright (c) 2013 James Almer
|
|
*
|
|
* 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/channel_layout.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "demux.h"
|
|
#include "internal.h"
|
|
|
|
static int adp_probe(const AVProbeData *p)
|
|
{
|
|
int i, changes = 0;
|
|
uint8_t last = 0;
|
|
|
|
if (p->buf_size < 32)
|
|
return 0;
|
|
|
|
for (i = 0; i < p->buf_size - 3; i+=32) {
|
|
if (p->buf[i] != p->buf[i+2] || p->buf[i+1] != p->buf[i+3])
|
|
return 0;
|
|
if (p->buf[i] != last)
|
|
changes++;
|
|
last = p->buf[i];
|
|
}
|
|
if (changes <= 1)
|
|
return 0;
|
|
|
|
return p->buf_size < 260 ? 1 : AVPROBE_SCORE_MAX / 4;
|
|
}
|
|
|
|
static int adp_read_header(AVFormatContext *s)
|
|
{
|
|
AVStream *st;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_DTK;
|
|
st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
|
|
st->codecpar->sample_rate = 48000;
|
|
st->start_time = 0;
|
|
if (s->pb->seekable & AVIO_SEEKABLE_NORMAL)
|
|
st->duration = av_get_audio_frame_duration2(st->codecpar, avio_size(s->pb));
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adp_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret, size = 1024;
|
|
|
|
if (avio_feof(s->pb))
|
|
return AVERROR_EOF;
|
|
|
|
ret = av_get_packet(s->pb, pkt, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pkt->stream_index = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
const FFInputFormat ff_adp_demuxer = {
|
|
.p.name = "adp",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("ADP"),
|
|
.p.extensions = "adp,dtk",
|
|
.read_probe = adp_probe,
|
|
.read_header = adp_read_header,
|
|
.read_packet = adp_read_packet,
|
|
};
|