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101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/*
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* RAW PCM demuxers
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* Copyright (c) 2002 Fabrice Bellard
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* Copyright (c) 2022 Jack Bruienne
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include "internal.h"
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#include "pcm.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/avassert.h"
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typedef struct DFPWMAudioDemuxerContext {
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AVClass *class;
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int sample_rate;
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#if FF_API_OLD_CHANNEL_LAYOUT
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int channels;
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#endif
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AVChannelLayout ch_layout;
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} DFPWMAudioDemuxerContext;
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static int dfpwm_read_header(AVFormatContext *s)
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{
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DFPWMAudioDemuxerContext *s1 = s->priv_data;
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AVCodecParameters *par;
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AVStream *st;
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int ret;
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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par = st->codecpar;
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par->codec_type = AVMEDIA_TYPE_AUDIO;
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par->codec_id = AV_CODEC_ID_DFPWM;
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par->sample_rate = s1->sample_rate;
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#if FF_API_OLD_CHANNEL_LAYOUT
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if (s1->ch_layout.nb_channels) {
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#endif
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ret = av_channel_layout_copy(&par->ch_layout, &s1->ch_layout);
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if (ret < 0)
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return ret;
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#if FF_API_OLD_CHANNEL_LAYOUT
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} else
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par->ch_layout.nb_channels = s1->channels;
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#endif
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par->bits_per_coded_sample = 1;
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par->block_align = 1;
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avpriv_set_pts_info(st, 64, 1, par->sample_rate);
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return 0;
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}
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static const AVOption dfpwm_options[] = {
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{ "sample_rate", "", offsetof(DFPWMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 48000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
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#if FF_API_OLD_CHANNEL_LAYOUT
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{ "channels", "", offsetof(DFPWMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_DEPRECATED },
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{ "ch_layout", "", offsetof(DFPWMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
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#else
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{ "ch_layout", "", offsetof(DFPWMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = "mono"}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
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#endif
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{ NULL },
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};
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static const AVClass dfpwm_demuxer_class = {
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.class_name = "dfpwm demuxer",
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.item_name = av_default_item_name,
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.option = dfpwm_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const AVInputFormat ff_dfpwm_demuxer = {
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.name = "dfpwm",
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.long_name = NULL_IF_CONFIG_SMALL("raw DFPWM1a"),
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.priv_data_size = sizeof(DFPWMAudioDemuxerContext),
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.read_header = dfpwm_read_header,
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.read_packet = ff_pcm_read_packet,
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.read_seek = ff_pcm_read_seek,
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.flags = AVFMT_GENERIC_INDEX,
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.extensions = "dfpwm",
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.raw_codec_id = AV_CODEC_ID_DFPWM,
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.priv_class = &dfpwm_demuxer_class,
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};
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