149 lines
3.3 KiB
C++
149 lines
3.3 KiB
C++
/*
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* Copyright 2003-2019 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "Convert.hxx"
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#include "ConfiguredResampler.hxx"
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#include "util/ConstBuffer.hxx"
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#include <assert.h>
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void
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pcm_convert_global_init(const ConfigData &config)
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{
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pcm_resampler_global_init(config);
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}
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PcmConvert::PcmConvert(const AudioFormat _src_format,
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const AudioFormat dest_format)
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:src_format(_src_format)
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{
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assert(src_format.IsValid());
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assert(dest_format.IsValid());
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AudioFormat format = _src_format;
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if (format.format == SampleFormat::DSD)
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format.format = SampleFormat::FLOAT;
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enable_resampler = format.sample_rate != dest_format.sample_rate;
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if (enable_resampler) {
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resampler.Open(format, dest_format.sample_rate);
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format.format = resampler.GetOutputSampleFormat();
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format.sample_rate = dest_format.sample_rate;
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}
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enable_format = format.format != dest_format.format;
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if (enable_format) {
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try {
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format_converter.Open(format.format,
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dest_format.format);
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} catch (...) {
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if (enable_resampler)
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resampler.Close();
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throw;
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}
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}
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format.format = dest_format.format;
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enable_channels = format.channels != dest_format.channels;
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if (enable_channels) {
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try {
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channels_converter.Open(format.format, format.channels,
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dest_format.channels);
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} catch (...) {
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if (enable_format)
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format_converter.Close();
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if (enable_resampler)
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resampler.Close();
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throw;
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}
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}
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}
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PcmConvert::~PcmConvert() noexcept
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{
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if (enable_channels)
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channels_converter.Close();
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if (enable_format)
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format_converter.Close();
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if (enable_resampler)
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resampler.Close();
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#ifdef ENABLE_DSD
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dsd.Reset();
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#endif
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}
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void
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PcmConvert::Reset() noexcept
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{
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if (enable_resampler)
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resampler.Reset();
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#ifdef ENABLE_DSD
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dsd.Reset();
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#endif
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}
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ConstBuffer<void>
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PcmConvert::Convert(ConstBuffer<void> buffer)
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{
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#ifdef ENABLE_DSD
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if (src_format.format == SampleFormat::DSD) {
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auto s = ConstBuffer<uint8_t>::FromVoid(buffer);
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auto d = dsd.ToFloat(src_format.channels, s);
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if (d.IsNull())
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throw std::runtime_error("DSD to PCM conversion failed");
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buffer = d.ToVoid();
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}
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#endif
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if (enable_resampler)
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buffer = resampler.Resample(buffer);
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if (enable_format)
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buffer = format_converter.Convert(buffer);
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if (enable_channels)
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buffer = channels_converter.Convert(buffer);
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return buffer;
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}
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ConstBuffer<void>
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PcmConvert::Flush()
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{
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if (enable_resampler) {
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auto buffer = resampler.Flush();
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if (!buffer.IsNull()) {
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if (enable_format)
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buffer = format_converter.Convert(buffer);
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if (enable_channels)
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buffer = channels_converter.Convert(buffer);
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return buffer;
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}
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}
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return nullptr;
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}
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