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◆ main openmsx / src / sound / WavWriter.hh
1.6 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#ifndef WAVWRITER_HH
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#define WAVWRITER_HH
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#include "File.hh"
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#include "Mixer.hh"
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#include <cassert>
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#include <cstdint>
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#include <span>
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#include <string>
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namespace openmsx {
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/** Base class for writing WAV files.
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  */
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class WavWriter
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{
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public:
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	/** Returns false if there has been data written to the wav image.
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	 */
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	[[nodiscard]] bool isEmpty() const { return bytes == 0; }
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	/** Returns the number of bytes (not samples) written so far.
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	 */
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	[[nodiscard]] uint32_t getBytes() const { return bytes; }
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	/** Flush data to file and update header. Try to make (possibly)
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	  * incomplete file already usable for external programs.
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	  */
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	void flush();
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protected:
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	WavWriter(const std::string& filename,
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	          unsigned channels, unsigned bits, unsigned frequency);
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	~WavWriter();
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protected:
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	File file;
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	uint32_t bytes = 0;
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};
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/** Writes 8-bit WAV files.
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  */
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class Wav8Writer : public WavWriter
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{
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public:
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	Wav8Writer(const std::string& filename, unsigned channels, unsigned frequency)
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		: WavWriter(filename, channels, 8, frequency) {}
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	void write(std::span<const uint8_t> buffer);
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};
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/** Writes 16-bit WAV files.
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  */
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class Wav16Writer : public WavWriter
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{
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public:
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	Wav16Writer(const std::string& filename, unsigned channels, unsigned frequency)
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		: WavWriter(filename, channels, 16, frequency) {}
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	void write(std::span<const int16_t> buffer);
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	void write(std::span<const float> buffer, float amp = 1.0f);
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	void write(std::span<const StereoFloat> buffer, float ampLeft = 1.0f, float ampRight = 1.0f);
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	void writeSilence(uint32_t samples);
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};
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} // namespace openmsx
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#endif