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/*
* Copyright (C) 2003-2014 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 "PcmConvert.hxx"
#include "Domain.hxx"
#include "ConfiguredResampler.hxx"
#include "AudioFormat.hxx"
#include "util/ConstBuffer.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "util/ConstBuffer.hxx"
#include <assert.h>
#include <math.h>
bool
pcm_convert_global_init(Error &error)
{
return pcm_resampler_global_init(error);
}
PcmConvert::PcmConvert()
{
#ifndef NDEBUG
src_format.Clear();
dest_format.Clear();
#endif
}
PcmConvert::~PcmConvert()
{
assert(!src_format.IsValid());
assert(!dest_format.IsValid());
}
bool
PcmConvert::Open(AudioFormat _src_format, AudioFormat _dest_format,
Error &error)
{
assert(!src_format.IsValid());
assert(!dest_format.IsValid());
assert(_src_format.IsValid());
assert(_dest_format.IsValid());
src_format = _src_format;
dest_format = _dest_format;
AudioFormat format = src_format;
if (format.format == SampleFormat::DSD)
format.format = SampleFormat::FLOAT;
enable_resampler = format.sample_rate != dest_format.sample_rate;
if (enable_resampler) {
if (!resampler.Open(format, dest_format.sample_rate, error))
return false;
format.format = resampler.GetOutputSampleFormat();
format.sample_rate = dest_format.sample_rate;
}
enable_format = format.format != dest_format.format;
if (enable_format &&
!format_converter.Open(format.format, dest_format.format, error)) {
if (enable_resampler)
resampler.Close();
return false;
}
format.format = dest_format.format;
enable_channels = format.channels != dest_format.channels;
if (enable_channels &&
!channels_converter.Open(format.format, format.channels,
dest_format.channels, error)) {
if (enable_format)
format_converter.Close();
if (enable_resampler)
resampler.Close();
return false;
}
return true;
}
void
PcmConvert::Close()
{
if (enable_channels)
channels_converter.Close();
if (enable_format)
format_converter.Close();
if (enable_resampler)
resampler.Close();
dsd.Reset();
#ifndef NDEBUG
src_format.Clear();
dest_format.Clear();
#endif
}
ConstBuffer<void>
PcmConvert::Convert(ConstBuffer<void> buffer, Error &error)
{
if (src_format.format == SampleFormat::DSD) {
auto s = ConstBuffer<uint8_t>::FromVoid(buffer);
auto d = dsd.ToFloat(src_format.channels, s);
if (d.IsNull()) {
error.Set(pcm_domain,
"DSD to PCM conversion failed");
return nullptr;
}
buffer = d.ToVoid();
}
if (enable_resampler) {
buffer = resampler.Resample(buffer, error);
if (buffer.IsNull())
return nullptr;
}
if (enable_format) {
buffer = format_converter.Convert(buffer, error);
if (buffer.IsNull())
return nullptr;
}
if (enable_channels) {
buffer = channels_converter.Convert(buffer, error);
if (buffer.IsNull())
return nullptr;
}
return buffer;
}
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