3 files changed, 22 insertions, 0 deletions
diff --git a/arm7/lib/include/SND.h b/arm7/lib/include/SND.h
index 69db1a16..b471ac72 100644
--- a/arm7/lib/include/SND.h
+++ b/arm7/lib/include/SND.h
@@ -6,5 +6,6 @@
 void SND_Enable(void);
 void SND_SetOutputSelector(u8 leftOutputFrom, u8 rightOutputFrom, u8 outputCh1ToMixer, u8 outputCh3ToMixer);
 void SND_SetMasterVolume(u8 vol);
+void SND_StopChannel(s32 idx, BOOL hold);
 
 #endif //GUARD_SND_H
diff --git a/arm7/lib/include/SND_wave.h b/arm7/lib/include/SND_wave.h
new file mode 100644
index 00000000..e1ae93fe
--- /dev/null
+++ b/arm7/lib/include/SND_wave.h
@@ -0,0 +1,6 @@
+#ifndef GUARD_SND_WAVE_H
+#define GUARD_SND_WAVE_H
+
+void SND_InvalidateWave(void *begin, void *end);
+
+#endif //GUARD_SND_WAVE_H
diff --git a/arm7/lib/src/SND_wave.c b/arm7/lib/src/SND_wave.c
new file mode 100644
index 00000000..75d84e5f
--- /dev/null
+++ b/arm7/lib/src/SND_wave.c
@@ -0,0 +1,15 @@
+#include "SND_wave.h"
+
+#include "SND.h"
+#include "SND_work.h"
+
+void SND_InvalidateWave(void *start, void *end) {
+    for (u8 i = 0; i < SND_CHANNEL_COUNT; i++) {
+        struct SNDExChannel *chn = &SNDi_Work.channels[i];
+
+        if (chn->flags.active && chn->type == 0 && start <= chn->waveDataPtr && chn->waveDataPtr <= end) {
+            chn->flags.start = FALSE;
+            SND_StopChannel(i, 0);
+        }
+    }
+}