Diff: main.cpp

Revision:

15:bad48ea4468b

Parent:

14:f25c2f72b2aa

--- a/main.cpp	Sat Dec 01 13:57:52 2018 +0000
+++ b/main.cpp	Sat Jan 05 13:20:14 2019 +0000
@@ -44,16 +44,17 @@
 
 }
 
-uint8_t playSound(const unsigned char *sound, uint16_t soundSize, int volume = 255, int speed=255){
+uint8_t playSound(const unsigned char *sound, uint32_t soundSize, int volume = 255, float speed=255){
 
-    int channel=0;
+    int channel = 0;
+    float spd = (POK_AUD_FREQ / 11025);
 
-    snd[channel].currentSound = sound;
-    snd[channel].currentSoundSize = (soundSize*255)/speed;
-    snd[channel].soundPoint = 0;
-    snd[channel].playSample = 1;
-    snd[channel].volume = volume;
-    snd[channel].speed = speed;
+    snd[channel].currentSound = sound;                      // sound to play
+    snd[channel].currentSoundSize = (soundSize<<8)/speed;   // length of sound array adjusted for speed change
+    snd[channel].volume = volume;                            // volume, best kept below 64 as louder will cause clipping when playing multiple samples
+    snd[channel].speed = (speed/spd);                             // recalculated above
+    snd[channel].soundPoint = 0;                            // where the current sound is upto
+    snd[channel].playSample = 1;                            // 1 to play this sound, 0 not to
 
     return channel;
 }