ResampledSoundDevice.cc

Go to the documentation of this file.

#include "ResampledSoundDevice.hh"
#include "ResampleTrivial.hh"
#include "ResampleHQ.hh"
#include "ResampleLQ.hh"
#include "ResampleBlip.hh"
#include "MSXMotherBoard.hh"
#include "Reactor.hh"
#include "GlobalSettings.hh"
#include "EnumSetting.hh"
#include "unreachable.hh"
#include <cassert>
#include <memory>
 
namespace openmsx {
 
ResampledSoundDevice::ResampledSoundDevice(
                MSXMotherBoard& motherBoard, std::string_view name_,
                static_string_view description_, unsigned channels,
                unsigned inputSampleRate_, bool stereo_)
        : SoundDevice(motherBoard.getMSXMixer(), name_, description_,
                      channels, inputSampleRate_, stereo_)
        , resampleSetting(motherBoard.getReactor().getGlobalSettings().getResampleSetting())
        , emuClock(EmuTime::zero())
{
        resampleSetting.attach(*this);
}
 
ResampledSoundDevice::~ResampledSoundDevice()
{
        resampleSetting.detach(*this);
}
 
 
void ResampledSoundDevice::setOutputRate(unsigned /*hostSampleRate*/, double /*speed*/)
{
        createResampler();
}
 
bool ResampledSoundDevice::updateBuffer(size_t length, float* buffer,
                                        EmuTime::param time)
{
        return algo->generateOutput(buffer, length, time);
}
 
bool ResampledSoundDevice::generateInput(float* buffer, size_t num)
{
        return mixChannels(buffer, num);
}
 
 
void ResampledSoundDevice::update(const Setting& setting) noexcept
{
        (void)setting;
        assert(&setting == &resampleSetting);
        createResampler();
}
 
void ResampledSoundDevice::createResampler()
{
        const DynamicClock& hostClock = getHostSampleClock();
        EmuDuration outputPeriod = hostClock.getPeriod();
        EmuDuration inputPeriod(getEffectiveSpeed() / double(getInputRate()));
        emuClock.reset(hostClock.getTime());
        emuClock.setPeriod(inputPeriod);
 
        if (outputPeriod == inputPeriod) {
                algo = std::make_unique<ResampleTrivial>(*this);
        } else {
                switch (resampleSetting.getEnum()) {
                case RESAMPLE_HQ:
                        if (!isStereo()) {
                                algo = std::make_unique<ResampleHQ<1>>(*this, hostClock);
                        } else {
                                algo = std::make_unique<ResampleHQ<2>>(*this, hostClock);
                        }
                        break;
                case RESAMPLE_LQ:
                        if (!isStereo()) {
                                algo = ResampleLQ<1>::create(*this, hostClock);
                        } else {
                                algo = ResampleLQ<2>::create(*this, hostClock);
                        }
                        break;
                case RESAMPLE_BLIP:
                        if (!isStereo()) {
                                algo = std::make_unique<ResampleBlip<1>>(*this, hostClock);
                        } else {
                                algo = std::make_unique<ResampleBlip<2>>(*this, hostClock);
                        }
                        break;
                default:
                        UNREACHABLE;
                }
        }
}
 
} // namespace openmsx