mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +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>
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2021 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 binka_probe(const AVProbeData *p)
|
|
{
|
|
if (AV_RB32(p->buf) == MKBETAG('1', 'F', 'C', 'B') &&
|
|
(p->buf[4] == 1 || p->buf[4] == 2))
|
|
return AVPROBE_SCORE_MAX;
|
|
return 0;
|
|
}
|
|
|
|
static int binka_read_header(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
int entries, offset;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
avio_skip(pb, 5);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_BINKAUDIO_DCT;
|
|
st->codecpar->ch_layout.nb_channels = avio_r8(pb);
|
|
st->codecpar->sample_rate = avio_rl16(pb);
|
|
st->duration = avio_rl32(pb);
|
|
|
|
avio_skip(pb, 8);
|
|
entries = avio_rl16(pb);
|
|
|
|
offset = entries * 2 + 2;
|
|
avio_skip(pb, offset);
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int binka_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = s->streams[0];
|
|
int64_t pos;
|
|
int pkt_size;
|
|
int ret;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
pos = avio_tell(pb);
|
|
avio_skip(pb, 2);
|
|
pkt_size = avio_rl16(pb) + 4;
|
|
if (pkt_size <= 4)
|
|
return AVERROR(EIO);
|
|
ret = av_new_packet(pkt, pkt_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
avio_read(pb, pkt->data + 4, pkt_size - 4);
|
|
AV_WL32(pkt->data, pkt_size);
|
|
|
|
pkt->pos = pos;
|
|
pkt->stream_index = 0;
|
|
pkt->duration = av_get_audio_frame_duration2(st->codecpar, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const FFInputFormat ff_binka_demuxer = {
|
|
.p.name = "binka",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("Bink Audio"),
|
|
.p.flags = AVFMT_GENERIC_INDEX,
|
|
.p.extensions = "binka",
|
|
.read_probe = binka_probe,
|
|
.read_header = binka_read_header,
|
|
.read_packet = binka_read_packet,
|
|
};
|