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/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "ChannelsConverter.hxx"
#include "PcmChannels.hxx"
#include "util/ConstBuffer.hxx"
#include "util/RuntimeError.hxx"
#include <assert.h>
void
PcmChannelsConverter::Open(SampleFormat _format,
unsigned _src_channels, unsigned _dest_channels)
{
assert(_format != SampleFormat::UNDEFINED);
switch (_format) {
case SampleFormat::S16:
case SampleFormat::S24_P32:
case SampleFormat::S32:
case SampleFormat::FLOAT:
break;
default:
throw FormatRuntimeError("PCM channel conversion for %s is not implemented",
sample_format_to_string(_format));
}
format = _format;
src_channels = _src_channels;
dest_channels = _dest_channels;
}
void
PcmChannelsConverter::Close()
{
#ifndef NDEBUG
format = SampleFormat::UNDEFINED;
#endif
}
ConstBuffer<void>
PcmChannelsConverter::Convert(ConstBuffer<void> src) noexcept
{
switch (format) {
case SampleFormat::UNDEFINED:
case SampleFormat::S8:
case SampleFormat::DSD:
assert(false);
gcc_unreachable();
case SampleFormat::S16:
return pcm_convert_channels_16(buffer, dest_channels,
src_channels,
ConstBuffer<int16_t>::FromVoid(src)).ToVoid();
case SampleFormat::S24_P32:
return pcm_convert_channels_24(buffer, dest_channels,
src_channels,
ConstBuffer<int32_t>::FromVoid(src)).ToVoid();
case SampleFormat::S32:
return pcm_convert_channels_32(buffer, dest_channels,
src_channels,
ConstBuffer<int32_t>::FromVoid(src)).ToVoid();
case SampleFormat::FLOAT:
return pcm_convert_channels_float(buffer, dest_channels,
src_channels,
ConstBuffer<float>::FromVoid(src)).ToVoid();
}
assert(false);
gcc_unreachable();
}
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