arm7: split SND into SND_global and SND_channel

1 files changed, 53 insertions, 0 deletions

diff --git a/arm7/lib/src/SND_global.c b/arm7/lib/src/SND_global.c
new file mode 100644
index 00000000..0654934f
--- /dev/null
+++ b/arm7/lib/src/SND_global.c
@@ -0,0 +1,53 @@
+#include "SND_global.h"
+
+#include "SND_channel.h"
+#include "SND_work.h"
+
+#include "OS_system.h"
+#include "PM.h"
+#include "registers.h"
+#include "syscall.h"
+
+void SND_Enable(void) {
+    reg_SOUNDCNT_MIX |= 0x80;
+}
+
+void SND_Disable(void) {
+    reg_SOUNDCNT_MIX &= ~0x80;
+}
+
+void SND_Shutdown(void) {
+    SND_Disable();
+
+    for (int i = 0; i < SND_CHANNEL_COUNT; i++) {
+        SND_StopChannel(i, 1);
+    }
+
+    reg_SNDCAPxCNT(0) = 0;
+    reg_SNDCAPxCNT(1) = 0;
+}
+
+void SND_BeginSleep(void) {
+    SND_Disable();
+    SVC_SoundBiasReset(0x80);
+    OS_SpinWait(0x40000);
+    PMi_ResetControl(1);
+    reg_POWCNT2 &= ~1;
+}
+
+void SND_EndSleep(void) {
+    reg_POWCNT2 |= 1;   // enable speakers
+    PMi_SetControl(1);
+    SVC_SoundBiasSet(0x100);
+    OS_SpinWait(0x7AB80); // what does this wait for and how long does it wait?
+    SND_Enable();
+}
+
+void SND_SetMasterVolume(int vol) {
+    reg_SOUNDCNT_VOL = (u8)vol;
+}
+
+void SND_SetOutputSelector(int leftOutputFrom, int rightOutputFrom, int outputCh1ToMixer, int outputCh3ToMixer) {
+    int masterEnable = (reg_SOUNDCNT_MIX & 0x80) ? 1 : 0;
+    reg_SOUNDCNT_MIX = (u8)((masterEnable << 7) | (outputCh3ToMixer << 5) | (outputCh1ToMixer << 4) | (rightOutputFrom << 2) | (leftOutputFrom));
+}