Convert .aif files to .wav (#711)

* Migrate .aif files to .wav

* cleanup

tools/wav2agb/wav_file.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <string>
+#include <fstream>
+#include <vector>
+#include <limits>
+#include <cstdint>
+
+#define WAV_INVALID_VAL 0xFFFFFFFFu
+
+class wav_file {
+public:
+    wav_file(const std::string& path);
+    ~wav_file();
+
+    void readData(size_t location, double *data, size_t len);
+private:
+    std::ifstream ifs;
+    std::streampos dataChunkPos;
+    std::streampos dataChunkEndPos;
+    size_t loadedChunk = WAV_INVALID_VAL;
+
+    std::vector<double> loadBuffer;
+    size_t loadBufferBlock = std::numeric_limits<size_t>::max();
+    enum class format_type {
+        u8, s16, s24, s32,
+        f32, f64,
+    } fmt;
+    uint32_t fmt_size() const;
+public:
+    uint32_t loopStart = 0; // samples
+    uint32_t loopEnd = std::numeric_limits<uint32_t>::max();   // samples
+    bool loopEnabled = false;
+    double tuning = 0.0;    // cents
+    uint8_t midiKey = 60;
+    uint32_t sampleRate;
+    uint32_t agbPitch = 0; // optional: exact GBA pitch value from 'agbp' chunk (0 = not present)
+};