143 lines
2.9 KiB
C++
143 lines
2.9 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "Convert.hxx"
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#include "ConfiguredResampler.hxx"
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#include "util/SpanCast.hxx"
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#include <cassert>
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#include <stdexcept>
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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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#ifdef ENABLE_DSD
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dsd2pcm_float = dest_format.format == SampleFormat::FLOAT;
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format.format = dsd2pcm_float
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? SampleFormat::FLOAT
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: SampleFormat::S24_P32;
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#else
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throw std::runtime_error("DSD support is disabled");
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#endif
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}
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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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std::span<const std::byte>
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PcmConvert::Convert(std::span<const std::byte> 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 d = dsd2pcm_float
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? std::as_bytes(dsd.ToFloat(src_format.channels, buffer))
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: std::as_bytes(dsd.ToS24(src_format.channels, buffer));
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if (d.data() == nullptr)
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throw std::runtime_error("DSD to PCM conversion failed");
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buffer = d;
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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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std::span<const std::byte>
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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.data() != nullptr) {
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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 {};
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}
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