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99 lines
3.3 KiB
99 lines
3.3 KiB
/* |
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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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.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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