Very low audio period hack improvement (R-Type II)

diff --git a/audio.cpp b/audio.cpp
index 14846165d6cab9b98782ea591701e716026879e7..f51876c47a42821a931f29a3d847cb540873e932 100644 (file)
--- a/audio.cpp
+++ b/audio.cpp
@@ -2506,8 +2506,15 @@ void event_audxdat_func(uae_u32 v)
                        if (cdp->wlen == 1) {
                                cdp->wlen = cdp->len;
                                // if very low period sample repeats, set higher period value to not cause huge performance drop
-                               if (cdp->per < PERIOD_MIN_LOOP * CYCLE_UNIT) {
-                                       cdp->minperloop++;
+                               // For example: Spaceport, R-Type II, Rambo III
+                               if (cdp->per < PERIOD_MIN_LOOP * CYCLE_UNIT && !(intena & (1 << (nr + 7))) && !(currprefs.cs_hacks & 32)) {
+                                       int add = 1;
+                                       if (cdp->len == 0 || cdp->len > 10000) {
+                                               add = PERIOD_MIN_LOOP_COUNT;
+                                       } else if (cdp->len > 1000) {
+                                               add = 5;
+                                       }
+                                       cdp->minperloop += add;
                                        if (cdp->minperloop >= PERIOD_MIN_LOOP_COUNT) {
                                                cdp->per = PERIOD_MIN_LOOP * CYCLE_UNIT;
                                        }