From 136cc733f9ac2ceb6a2b9b5e1f1ad8bca810b656 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dar=C3=ADo?= <dariosamo@gmail.com>
Date: Thu, 23 Jul 2026 23:04:06 -0300
Subject: [PATCH] Move allocation of audio buffers from heap to static buffers.
 (#308)

---
 patches/memory_patches.c | 61 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 patches/memory_patches.c

diff --git a/patches/memory_patches.c b/patches/memory_patches.c
new file mode 100644
index 0000000..2c41db1
--- /dev/null
+++ b/patches/memory_patches.c
@@ -0,0 +1,61 @@
+#include "patches.h"
+
+#define AUDIO_HEAP_SIZE VER_SELECT(0x21000, 0x23A00, 0x21000, 0x21000)
+extern s32 osViClock; //0x80277128
+extern ALHeap D_8027CFF0;
+extern u8 *D_8027D000;
+
+u8 recomp_audio_heap[AUDIO_HEAP_SIZE];
+
+void audioManager_create(void);
+void sfxInstruments_init(void);
+void musicInstruments_init(void);
+void audioManager_startThread(void);
+
+// @recomp Patched to move the audio heap out of the main heap so that the main heap has less pressure.
+RECOMP_PATCH void audioManager_init(void){
+    // @recomp Allocate the audio heap out of a static buffer.    
+    // D_8027D000 = (u8 *) malloc(AUDIO_HEAP_SIZE);
+    D_8027D000 = recomp_audio_heap;
+    bzero(D_8027D000, AUDIO_HEAP_SIZE);
+    alHeapInit(&D_8027CFF0, D_8027D000, AUDIO_HEAP_SIZE);
+#if VERSION == VERSION_USA_1_0
+    if(osTvType != OS_TV_NTSC)
+        osViClock = 0x2e6025c;
+#elif VERSION == VERSION_PAL
+    osViClock = 0x2f5b2d2;
+#endif
+    audioManager_create();
+    sfxInstruments_init();
+    musicInstruments_init();
+    audioManager_startThread();
+}
+
+extern u16 *D_80276CB8; //! ml_acosPrecValTblPtr
+
+u16 recomp_sine_table[10001];
+
+// @recomp Patched to move the sine table out of the heap to reduce heap pressure.
+RECOMP_PATCH void ml_init(void)
+{
+    u16 i;
+
+    // Allocate table
+    // @recomp Change the table to be in a statically declared array.
+    // D_80276CB8 = (u16 *)malloc(10001 * sizeof(u16));
+    D_80276CB8 = recomp_sine_table;
+
+    // Generate all entries in the table
+    for (i = 0; i < 10001; i++)
+    {
+        // Save value
+        D_80276CB8[i] = sinf(i * 90.0 / 10000 * M_PI / 180) * 65535.f;
+    }
+}
+
+RECOMP_PATCH void ml_free(void)
+{
+    // @recomp Can't free a statically declared array.
+    // free(D_80276CB8);
+    D_80276CB8 = NULL;
+}
\ No newline at end of file