mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
87 lines
2.6 KiB
87 lines
2.6 KiB
/* |
|
* WADY 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/channel_layout.h" |
|
#include "libavutil/intreadwrite.h" |
|
#include "avformat.h" |
|
#include "demux.h" |
|
#include "internal.h" |
|
#include "pcm.h" |
|
|
|
static int wady_probe(const AVProbeData *p) |
|
{ |
|
if (AV_RL32(p->buf) != MKTAG('W','A','D','Y')) |
|
return 0; |
|
if (p->buf[4] != 0 || p->buf[5] == 0 || |
|
AV_RL16(p->buf+6) == 0 || |
|
AV_RL16(p->buf+6) > 2 || |
|
(int32_t)AV_RL32(p->buf+8) <= 0) |
|
return 0; |
|
|
|
return AVPROBE_SCORE_MAX / 3 * 2; |
|
} |
|
|
|
static int wady_read_header(AVFormatContext *s) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
AVCodecParameters *par; |
|
int channels, ret; |
|
AVStream *st; |
|
|
|
avio_skip(pb, 4 + 1); |
|
|
|
st = avformat_new_stream(s, NULL); |
|
if (!st) |
|
return AVERROR(ENOMEM); |
|
|
|
par = st->codecpar; |
|
par->codec_type = AVMEDIA_TYPE_AUDIO; |
|
par->codec_id = AV_CODEC_ID_WADY_DPCM; |
|
par->format = AV_SAMPLE_FMT_S16; |
|
if ((ret = ff_get_extradata(s, par, pb, 1)) < 0) |
|
return ret; |
|
channels = avio_rl16(pb); |
|
if (channels == 0) |
|
return AVERROR_INVALIDDATA; |
|
av_channel_layout_default(&par->ch_layout, channels); |
|
par->sample_rate = avio_rl32(pb); |
|
if (par->sample_rate <= 0) |
|
return AVERROR_INVALIDDATA; |
|
avio_skip(pb, 4); |
|
st->duration = avio_rl32(pb); |
|
par->block_align = channels; |
|
avpriv_set_pts_info(st, 64, 1, par->sample_rate); |
|
|
|
avio_seek(pb, 0x30, SEEK_SET); |
|
|
|
return 0; |
|
} |
|
|
|
const FFInputFormat ff_wady_demuxer = { |
|
.p.name = "wady", |
|
.p.long_name = NULL_IF_CONFIG_SMALL("Marble WADY"), |
|
.p.flags = AVFMT_GENERIC_INDEX, |
|
.p.extensions = "way", |
|
.read_probe = wady_probe, |
|
.read_header = wady_read_header, |
|
.read_packet = ff_pcm_read_packet, |
|
.read_seek = ff_pcm_read_seek, |
|
};
|
|
|