mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/*
|
|
* 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 = s->iformat->raw_codec_id;
|
|
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",
|
|
.item_name = av_default_item_name,
|
|
.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,
|
|
};
|