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/*
* RAW PCM demuxers
* Copyright (c) 2002 Fabrice Bellard
* Copyright (c) 2022 Jack Bruienne
*
* 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/avstring.h"
#include "avformat.h"
#include "internal.h"
#include "pcm.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/avassert.h"
typedef struct DFPWMAudioDemuxerContext {
AVClass *class;
int sample_rate;
#if FF_API_OLD_CHANNEL_LAYOUT
int channels;
#endif
AVChannelLayout ch_layout;
} DFPWMAudioDemuxerContext;
static int dfpwm_read_header(AVFormatContext *s)
{
DFPWMAudioDemuxerContext *s1 = s->priv_data;
AVCodecParameters *par;
AVStream *st;
int ret;
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_DFPWM;
par->sample_rate = s1->sample_rate;
#if FF_API_OLD_CHANNEL_LAYOUT
if (s1->ch_layout.nb_channels) {
#endif
ret = av_channel_layout_copy(&par->ch_layout, &s1->ch_layout);
if (ret < 0)
return ret;
#if FF_API_OLD_CHANNEL_LAYOUT
} else
par->ch_layout.nb_channels = s1->channels;
#endif
par->bits_per_coded_sample = 1;
par->block_align = 1;
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
return 0;
}
static const AVOption dfpwm_options[] = {
{ "sample_rate", "", offsetof(DFPWMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 48000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
#if FF_API_OLD_CHANNEL_LAYOUT
{ "channels", "", offsetof(DFPWMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_DEPRECATED },
{ "ch_layout", "", offsetof(DFPWMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
#else
{ "ch_layout", "", offsetof(DFPWMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = "mono"}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
#endif
{ NULL },
};
static const AVClass dfpwm_demuxer_class = {
.class_name = "dfpwm demuxer",
.option = dfpwm_options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVInputFormat ff_dfpwm_demuxer = {
.name = "dfpwm",
.long_name = NULL_IF_CONFIG_SMALL("raw DFPWM1a"),
.priv_data_size = sizeof(DFPWMAudioDemuxerContext),
.read_header = dfpwm_read_header,
.read_packet = ff_pcm_read_packet,
.read_seek = ff_pcm_read_seek,
.flags = AVFMT_GENERIC_INDEX,
.extensions = "dfpwm",
.raw_codec_id = AV_CODEC_ID_DFPWM,
.priv_class = &dfpwm_demuxer_class,
};
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