audio load.c decomp (#176)

1 files changed, 75 insertions, 0 deletions

diff --git a/src/audio/internal.h b/src/audio/internal.h
index afcabb180..f9bbc5593 100644
--- a/src/audio/internal.h
+++ b/src/audio/internal.h
@@ -3,11 +3,57 @@
 
 #include <PR/ultratypes.h>
 
+
+// No-op printf macro which leaves string literals in rodata in IDO. IDO
+// doesn't support variadic macros, so instead we let the parameter list
+// expand to a no-op comma expression. Another possibility is that it might
+// have expanded to something with "if (0)". See also goddard/gd_main.h.
+// On US/JP, -sopt optimizes away these except for external.c.
+#ifdef __sgi
+#define stubbed_printf
+#else
+#define stubbed_printf(...)
+#endif
+
+#define stubbed_printf_0(msg) stubbed_printf(msg)
+#define stubbed_printf_1(msg, a) stubbed_printf(msg, a)
+#define stubbed_printf_2(msg, a, b) stubbed_printf(msg, a, b)
+#define stubbed_printf_3(msg, a, b, c) stubbed_printf(msg, a, b, c)
+
+
 struct AdsrEnvelope {
     s16 delay;
     s16 arg;
 }; // size = 0x4
 
+struct AdpcmLoop {
+    u32 start;
+    u32 end;
+    u32 count;
+    u32 pad;
+    s16 state[16]; // only exists if count != 0. 8-byte aligned
+};
+
+struct AdpcmBook {
+    s32 order;
+    s32 npredictors;
+    s16 book[1]; // size 8 * order * npredictors. 8-byte aligned
+};
+
+struct AudioBankSample {
+    u8 unused;
+    u8 loaded;
+    u8 *sampleAddr;
+    struct AdpcmLoop *loop;
+    struct AdpcmBook *book;
+    u32 sampleSize; // never read. either 0 or 1 mod 9, depending on padding
+};
+
+struct AudioBankSound {
+    struct AudioBankSample *sample;
+    f32 tuning; // frequency scale factor
+}; // size = 0x8
+
 struct NoteSub
 {
     /*0x00*/ volatile u8 enabled : 1;
@@ -35,4 +81,33 @@ struct NoteSub
     } sound;
 };
 
+struct AudioSessionSettings {
+    /*0x00*/ u32 frequency;
+    /*0x04*/ u8 maxSimultaneousNotes;
+    /*0x05*/ u8 reverbDownsampleRate; // always 1
+    /*0x06*/ u16 reverbWindowSize;
+    /*0x08*/ u16 reverbGain;
+    /*0x0A*/ u16 volume;
+    /*0x0C*/ u32 persistentSeqMem;
+    /*0x10*/ u32 persistentBankMem;
+    /*0x14*/ u32 temporarySeqMem;
+    /*0x18*/ u32 temporaryBankMem;
+}; // size = 0x1C
+
+struct AudioBufferParametersEU {
+    /*0x00*/ s16 presetUnk4; // audio frames per vsync?
+    /*0x02*/ u16 frequency;
+    /*0x04*/ u16 aiFrequency; // ?16
+    /*0x06*/ s16 samplesPerFrameTarget;
+    /*0x08*/ s16 maxAiBufferLength;
+    /*0x0A*/ s16 minAiBufferLength;
+    /*0x0C*/ s16 updatesPerFrame;
+    /*0x0E*/ s16 samplesPerUpdate;
+    /*0x10*/ s16 samplesPerUpdateMax;
+    /*0x12*/ s16 samplesPerUpdateMin;
+    /*0x14*/ f32 resampleRate; // contains 32000.0f / frequency
+    /*0x18*/ f32 updatesPerFrameInv; // 1.0f / updatesPerFrame
+    /*0x1C*/ f32 unkUpdatesPerFrameScaled; // 3.0f / (1280.0f * updatesPerFrame)
+};
+
 #endif