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◆ main openmsx / src / sound / ResampledSoundDevice.cc
2.2 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "ResampledSoundDevice.hh"
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#include "ResampleBlip.hh"
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#include "ResampleHQ.hh"
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#include "ResampleTrivial.hh"
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#include "EnumSetting.hh"
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#include "GlobalSettings.hh"
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#include "MSXMotherBoard.hh"
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#include "Reactor.hh"
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#include "unreachable.hh"
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#include <cassert>
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#include <memory>
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namespace openmsx {
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ResampledSoundDevice::ResampledSoundDevice(
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		MSXMotherBoard& motherBoard, std::string_view name_,
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		static_string_view description_, unsigned channels,
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		unsigned inputSampleRate_, bool stereo_)
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	: SoundDevice(motherBoard.getMSXMixer(), name_, description_,
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	              channels, inputSampleRate_, stereo_)
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	, resampleSetting(motherBoard.getReactor().getGlobalSettings().getResampleSetting())
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{
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	resampleSetting.attach(*this);
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}
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ResampledSoundDevice::~ResampledSoundDevice()
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{
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	resampleSetting.detach(*this);
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}
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void ResampledSoundDevice::setOutputRate(unsigned /*hostSampleRate*/, double /*speed*/)
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{
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	createResampler();
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}
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bool ResampledSoundDevice::updateBuffer(size_t length, float* buffer,
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                                        EmuTime time)
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{
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	return algo->generateOutput(buffer, length, time);
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}
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bool ResampledSoundDevice::generateInput(float* buffer, size_t num)
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{
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	return mixChannels(buffer, num);
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}
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void ResampledSoundDevice::update(const Setting& setting) noexcept
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{
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	(void)setting;
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	assert(&setting == &resampleSetting);
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	createResampler();
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}
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void ResampledSoundDevice::createResampler()
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{
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	const DynamicClock& hostClock = getHostSampleClock();
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	EmuDuration outputPeriod = hostClock.getPeriod();
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	EmuDuration inputPeriod = EmuDuration::sec(getEffectiveSpeed() / double(getInputRate()));
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	emuClock.reset(hostClock.getTime());
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	emuClock.setPeriod(inputPeriod);
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	if (outputPeriod == inputPeriod) {
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		algo = std::make_unique<ResampleTrivial>(*this);
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	} else {
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		switch (resampleSetting.getEnum()) {
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		case ResampleType::HQ:
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			if (!isStereo()) {
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				algo = std::make_unique<ResampleHQ<1>>(*this, hostClock);
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			} else {
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				algo = std::make_unique<ResampleHQ<2>>(*this, hostClock);
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			}
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			break;
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		case ResampleType::BLIP:
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			if (!isStereo()) {
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				algo = std::make_unique<ResampleBlip<1>>(*this, hostClock);
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			} else {
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				algo = std::make_unique<ResampleBlip<2>>(*this, hostClock);
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			}
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			break;
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		default:
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			UNREACHABLE;
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		}
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	}
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}
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} // namespace openmsx