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/*
* Copyright 2003-2021 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 "Convert.hxx"
#include "ConfiguredResampler.hxx"
#include "util/ConstBuffer.hxx"
#include <cassert>
#include <stdexcept>
void
pcm_convert_global_init(const ConfigData &config)
{
pcm_resampler_global_init(config);
}
PcmConvert::PcmConvert(const AudioFormat _src_format,
const AudioFormat dest_format)
:src_format(_src_format)
{
assert(src_format.IsValid());
assert(dest_format.IsValid());
AudioFormat format = _src_format;
if (format.format == SampleFormat::DSD) {
#ifdef ENABLE_DSD
dsd2pcm_float = dest_format.format == SampleFormat::FLOAT;
format.format = dsd2pcm_float
? SampleFormat::FLOAT
: SampleFormat::S24_P32;
#else
throw std::runtime_error("DSD support is disabled");
#endif
}
enable_resampler = format.sample_rate != dest_format.sample_rate;
if (enable_resampler) {
resampler.Open(format, dest_format.sample_rate);
format.format = resampler.GetOutputSampleFormat();
format.sample_rate = dest_format.sample_rate;
}
enable_format = format.format != dest_format.format;
if (enable_format) {
try {
format_converter.Open(format.format,
dest_format.format);
} catch (...) {
if (enable_resampler)
resampler.Close();
throw;
}
}
format.format = dest_format.format;
enable_channels = format.channels != dest_format.channels;
if (enable_channels) {
try {
channels_converter.Open(format.format, format.channels,
dest_format.channels);
} catch (...) {
if (enable_format)
format_converter.Close();
if (enable_resampler)
resampler.Close();
throw;
}
}
}
PcmConvert::~PcmConvert() noexcept
{
if (enable_channels)
channels_converter.Close();
if (enable_format)
format_converter.Close();
if (enable_resampler)
resampler.Close();
#ifdef ENABLE_DSD
dsd.Reset();
#endif
}
void
PcmConvert::Reset() noexcept
{
if (enable_resampler)
resampler.Reset();
#ifdef ENABLE_DSD
dsd.Reset();
#endif
}
ConstBuffer<void>
PcmConvert::Convert(ConstBuffer<void> buffer)
{
#ifdef ENABLE_DSD
if (src_format.format == SampleFormat::DSD) {
auto s = ConstBuffer<uint8_t>::FromVoid(buffer);
auto d = dsd2pcm_float
? dsd.ToFloat(src_format.channels, s).ToVoid()
: dsd.ToS24(src_format.channels, s).ToVoid();
if (d.IsNull())
throw std::runtime_error("DSD to PCM conversion failed");
buffer = d;
}
#endif
if (enable_resampler)
buffer = resampler.Resample(buffer);
if (enable_format)
buffer = format_converter.Convert(buffer);
if (enable_channels)
buffer = channels_converter.Convert(buffer);
return buffer;
}
ConstBuffer<void>
PcmConvert::Flush()
{
if (enable_resampler) {
auto buffer = resampler.Flush();
if (!buffer.IsNull()) {
if (enable_format)
buffer = format_converter.Convert(buffer);
if (enable_channels)
buffer = channels_converter.Convert(buffer);
return buffer;
}
}
return nullptr;
}