Extract WAVE format parsing into its own function

rhubarb/src/audio/WaveFileReader.cpp

@@ -33,10 +33,9 @@ namespace Codec {
 
 string codecToString(int codec);
 
-WaveFileReader::WaveFileReader(const path& filePath) :
-	filePath(filePath),
-	formatInfo {}
-{
+WaveFormatInfo getWaveFormatInfo(const path& filePath) {
+	WaveFormatInfo formatInfo {};
+
 	auto file = openFile(filePath);
 
 	file.seekg(0, std::ios_base::end);
@@ -139,8 +138,14 @@ WaveFileReader::WaveFileReader(const path& filePath) :
 			}
 		}
 	}
+
+	return formatInfo;
 }
 
+WaveFileReader::WaveFileReader(const path& filePath) :
+	filePath(filePath),
+	formatInfo(getWaveFormatInfo(filePath)) {}
+
 unique_ptr<AudioClip> WaveFileReader::clone() const {
 	return make_unique<WaveFileReader>(*this);
 }

rhubarb/src/audio/WaveFileReader.h

@@ -10,6 +10,17 @@ enum class SampleFormat {
 	Float32
 };
 
+struct WaveFormatInfo {
+	int bytesPerFrame;
+	SampleFormat sampleFormat;
+	int frameRate;
+	int64_t frameCount;
+	int channelCount;
+	std::streampos dataOffset;
+};
+
+WaveFormatInfo getWaveFormatInfo(const std::filesystem::path& filePath);
+
 class WaveFileReader : public AudioClip {
 public:
 	WaveFileReader(const std::filesystem::path& filePath);
@@ -20,15 +31,6 @@ public:
 private:
 	SampleReader createUnsafeSampleReader() const override;
 
-	struct WaveFormatInfo {
-		int bytesPerFrame;
-		SampleFormat sampleFormat;
-		int frameRate;
-		int64_t frameCount;
-		int channelCount;
-		std::streampos dataOffset;
-	};
-
 	std::filesystem::path filePath;
 	WaveFormatInfo formatInfo;
 };