1 files changed, 75 insertions, 0 deletions
diff --git a/src/code/z_sound_source.c b/src/code/z_sound_source.c
new file mode 100644
index 000000000..ba7036a4c
--- /dev/null
+++ b/src/code/z_sound_source.c
@@ -0,0 +1,75 @@
+#include "global.h"
+
+void SoundSource_InitAll(GlobalContext* globalCtx) {
+    SoundSource* sources = &globalCtx->soundSources[0];
+    s32 i;
+
+    // clang-format off
+    for (i = 0; i < ARRAY_COUNT(globalCtx->soundSources); i++) { sources[i].countdown = 0; }
+    // clang-format on
+}
+
+void SoundSource_UpdateAll(GlobalContext* globalCtx) {
+    SoundSource* source = &globalCtx->soundSources[0];
+    s32 i;
+
+    for (i = 0; i < ARRAY_COUNT(globalCtx->soundSources); i++) {
+        if (source->countdown != 0) {
+            if (DECR(source->countdown) == 0) {
+                Audio_StopSfxByPos(&source->projectedPos);
+            } else {
+                SkinMatrix_Vec3fMtxFMultXYZ(&globalCtx->viewProjectionMtxF, &source->worldPos, &source->projectedPos);
+                if (source->playSfxEachFrame) {
+                    Audio_PlaySfxAtPos(&source->projectedPos, source->sfxId);
+                }
+            }
+        }
+
+        source++;
+    }
+}
+
+void SoundSource_Add(GlobalContext* globalCtx, Vec3f* worldPos, u32 duration, u16 sfxId, u32 playSfxEachFrame) {
+    s32 countdown;
+    SoundSource* source;
+    s32 smallestCountdown = 0xFFFF;
+    SoundSource* backupSource = NULL;
+    s32 i;
+
+    source = &globalCtx->soundSources[0];
+    for (i = 0; i < ARRAY_COUNT(globalCtx->soundSources); i++) {
+        if (source->countdown == 0) {
+            break;
+        }
+
+        // Store the sound source with the smallest remaining countdown
+        countdown = source->countdown;
+        if (countdown < smallestCountdown) {
+            smallestCountdown = countdown;
+            backupSource = source;
+        }
+        source++;
+    }
+
+    // If no sound source is available, replace the sound source with the smallest remaining countdown
+    if (i >= ARRAY_COUNT(globalCtx->soundSources)) {
+        source = backupSource;
+        Audio_StopSfxByPos(&source->projectedPos);
+    }
+
+    source->worldPos = *worldPos;
+    source->countdown = duration;
+    source->playSfxEachFrame = playSfxEachFrame;
+    source->sfxId = sfxId;
+
+    SkinMatrix_Vec3fMtxFMultXYZ(&globalCtx->viewProjectionMtxF, &source->worldPos, &source->projectedPos);
+    Audio_PlaySfxAtPos(&source->projectedPos, sfxId);
+}
+
+void SoundSource_PlaySfxAtFixedWorldPos(GlobalContext* globalCtx, Vec3f* worldPos, u32 duration, u16 sfxId) {
+    SoundSource_Add(globalCtx, worldPos, duration, sfxId, false);
+}
+
+void SoundSource_PlaySfxEachFrameAtFixedWorldPos(GlobalContext* globalCtx, Vec3f* worldPos, u32 duration, u16 sfxId) {
+    SoundSource_Add(globalCtx, worldPos, duration, sfxId, true);
+}