WavAudioInput.cc

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#include "WavAudioInput.hh"
#include "CommandController.hh"
#include "FileOperations.hh"
#include "PlugException.hh"
#include "CliComm.hh"
#include "serialize.hh"
 
namespace openmsx {
 
WavAudioInput::WavAudioInput(CommandController& commandController)
        : audioInputFilenameSetting(
                commandController, "audio-inputfilename",
                "filename of the file where the sampler reads data from",
                "audio-input.wav")
        , reference(EmuTime::zero())
{
        audioInputFilenameSetting.attach(*this);
}
 
WavAudioInput::~WavAudioInput()
{
        audioInputFilenameSetting.detach(*this);
}
 
void WavAudioInput::loadWave()
{
        wav = WavData(FileOperations::expandTilde(std::string(
                audioInputFilenameSetting.getString())));
}
 
std::string_view WavAudioInput::getName() const
{
        return "wavinput";
}
 
std::string_view WavAudioInput::getDescription() const
{
        return "Read .wav files. Can for example be used as input for "
               "samplers.";
}
 
void WavAudioInput::plugHelper(Connector& /*connector*/, EmuTime::param time)
{
        try {
                if (wav.getSize() == 0) {
                        loadWave();
                }
        } catch (MSXException& e) {
                throw PlugException("Load of wave file failed: ", e.getMessage());
        }
        reference = time;
}
 
void WavAudioInput::unplugHelper(EmuTime::param /*time*/)
{
}
 
void WavAudioInput::update(const Setting& setting) noexcept
{
        (void)setting;
        assert(&setting == &audioInputFilenameSetting);
        try {
                if (isPluggedIn()) {
                        loadWave();
                }
        } catch (MSXException& e) {
                // TODO proper error handling, message should go to console
                setting.getCommandController().getCliComm().printWarning(
                        "Load of wave file failed: ", e.getMessage());
        }
}
 
int16_t WavAudioInput::readSample(EmuTime::param time)
{
        if (wav.getSize()) {
                unsigned pos = (time - reference).getTicksAt(wav.getFreq());
                return wav.getSample(pos);
        }
        return 0;
}
 
template<typename Archive>
void WavAudioInput::serialize(Archive& ar, unsigned /*version*/)
{
        ar.serialize("reference", reference);
        if constexpr (Archive::IS_LOADER) {
                update(audioInputFilenameSetting);
        }
}
INSTANTIATE_SERIALIZE_METHODS(WavAudioInput);
REGISTER_POLYMORPHIC_INITIALIZER(Pluggable, WavAudioInput, "WavAudioInput");
 
} // namespace openmsx