OXYGENHUB
◆ main openmsx / src / cassette / TsxImage.cc
2.2 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
// Based on code written by:
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//   (2017) NataliaPC aka @ishwin74
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//   Under GPL License
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#include "TsxImage.hh"
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#include "TsxParser.hh"
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#include "CliComm.hh"
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#include "Clock.hh"
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#include "File.hh"
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#include "FilePool.hh"
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#include "Filename.hh"
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#include "MSXException.hh"
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#include "xrange.hh"
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namespace openmsx {
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TsxImage::TsxImage(const Filename& filename, FilePool& filePool, CliComm& cliComm)
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{
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	File file(filename.getResolved());
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	try {
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		TsxParser parser(file.mmap<const uint8_t>());
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		// Move the parsed waveform here
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		output = std::move(parser.stealOutput());
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		// Translate the TsxReader-filetype to a CassetteImage-filetype
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		if (auto type = parser.getFirstFileType()) {
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			setFirstFileType([&] {
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				switch (*type) {
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				case TsxParser::FileType::ASCII:  return CassetteImage::FileType::ASCII;
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				case TsxParser::FileType::BINARY: return CassetteImage::FileType::BINARY;
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				case TsxParser::FileType::BASIC:  return CassetteImage::FileType::BASIC;
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				default:                          return CassetteImage::FileType::UNKNOWN;
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				}
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			}(), filename);
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		}
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		// Print embedded messages
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		for (const auto& msg : parser.getMessages()) {
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			cliComm.printInfo(msg);
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		}
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	} catch (const std::string& msg) {
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		throw MSXException(filename.getOriginal(), ": ", msg);
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	}
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	// Conversion successful, now calculate sha1sum
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	setSha1Sum(filePool.getSha1Sum(file, filename.getResolved()));
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}
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int16_t TsxImage::getSampleAt(EmuTime time) const
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{
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	static const Clock<TsxParser::OUTPUT_FREQUENCY> zero(EmuTime::zero());
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	unsigned pos = zero.getTicksTill(time);
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	return pos < output.size() ? output[pos] * 256 : 0;
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}
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EmuTime TsxImage::getEndTime() const
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{
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	Clock<TsxParser::OUTPUT_FREQUENCY> clk(EmuTime::zero());
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	clk += unsigned(output.size());
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	return clk.getTime();
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}
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unsigned TsxImage::getFrequency() const
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{
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	return TsxParser::OUTPUT_FREQUENCY;
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}
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void TsxImage::fillBuffer(unsigned pos, std::span<float*, 1> bufs, unsigned num) const
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{
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	size_t nbSamples = output.size();
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	if (pos < nbSamples) {
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		for (auto i : xrange(num)) {
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			bufs[0][i] = (pos < nbSamples)
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			           ? output[pos]
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			           : 0;
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			++pos;
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		}
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	} else {
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		bufs[0] = nullptr;
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	}
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}
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float TsxImage::getAmplificationFactorImpl() const
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{
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	return 1.0f / 128;
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}
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} // namespace openmsx