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/*
* Copyright (C) 2003-2013 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 "FormatConverter.hxx"
#include "PcmFormat.hxx"
#include "Domain.hxx"
#include "util/ConstBuffer.hxx"
#include "util/Error.hxx"
#include <assert.h>
bool
PcmFormatConverter::Open(SampleFormat _src_format, SampleFormat _dest_format,
gcc_unused Error &error)
{
assert(_src_format != SampleFormat::UNDEFINED);
assert(_dest_format != SampleFormat::UNDEFINED);
src_format = _src_format;
dest_format = _dest_format;
return true;
}
void
PcmFormatConverter::Close()
{
#ifndef NDEBUG
src_format = SampleFormat::UNDEFINED;
dest_format = SampleFormat::UNDEFINED;
#endif
}
ConstBuffer<void>
PcmFormatConverter::Convert(ConstBuffer<void> src, Error &error)
{
const void *result = nullptr;
size_t result_size = 0;
switch (dest_format) {
case SampleFormat::UNDEFINED:
assert(false);
gcc_unreachable();
case SampleFormat::S8:
case SampleFormat::DSD:
result = nullptr;
break;
case SampleFormat::S16:
result = pcm_convert_to_16(buffer, dither,
src_format,
src.data, src.size,
&result_size);
break;
case SampleFormat::S24_P32:
result = pcm_convert_to_24(buffer,
src_format,
src.data, src.size,
&result_size);
break;
case SampleFormat::S32:
result = pcm_convert_to_32(buffer,
src_format,
src.data, src.size,
&result_size);
break;
case SampleFormat::FLOAT:
result = pcm_convert_to_float(buffer,
src_format,
src.data, src.size,
&result_size);
break;
}
if (result == nullptr) {
error.Format(pcm_domain,
"PCM conversion from %s to %s is not implemented",
sample_format_to_string(src_format),
sample_format_to_string(dest_format));
return nullptr;
}
return { result, result_size };
}
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