aesnd: use more accurate frequency calc

Author: WinterMute

gc/aesndlib.h

@@ -8,7 +8,7 @@
 #define	DSP_STREAMBUFFER_SIZE	1152			// input 2ms sound data at max. 144KHz
 
 #if defined(HW_DOL)
-	#define DSP_DEFAULT_FREQ	48044
+	#define DSP_DEFAULT_FREQ	(54000000.0f/1124.0f)
 #elif defined(HW_RVL)
 	#define DSP_DEFAULT_FREQ	48000
 #endif
@@ -48,10 +48,10 @@ void AESND_SetVoiceMute(AESNDPB *pb,bool mute);
 void AESND_SetVoiceLoop(AESNDPB *pb,bool loop);
 void AESND_SetVoiceFormat(AESNDPB *pb,u32 format);
 void AESND_SetVoiceStream(AESNDPB *pb,bool stream);
-void AESND_SetVoiceFrequency(AESNDPB *pb,u32 freq);
+void AESND_SetVoiceFrequency(AESNDPB *pb,f32 freq);
 void AESND_SetVoiceVolume(AESNDPB *pb,u16 volume_l,u16 volume_r);
 void AESND_SetVoiceBuffer(AESNDPB *pb,const void *buffer,u32 len);
-void AESND_PlayVoice(AESNDPB *pb,u32 format,const void *buffer,u32 len,u32 freq,u32 delay,bool looped);
+void AESND_PlayVoice(AESNDPB *pb,u32 format,const void *buffer,u32 len,f32 freq,u32 delay,bool looped);
 AESNDVoiceCallback AESND_RegisterVoiceCallback(AESNDPB *pb,AESNDVoiceCallback cb);
 
 #ifdef __cplusplus

libaesnd/aesndlib.c

@@ -149,9 +149,9 @@ static __inline__ void __aesndsetvoicebuffer(AESNDPB *pb,void* buffer,u32 len)
 	pb->mram_end = (u32)buffer + len;
 }
 
-static __inline__ void __aesndsetvoicefreq(AESNDPB *pb,u32 freq)
+static __inline__ void __aesndsetvoicefreq(AESNDPB *pb,f32 freq)
 {
-	register u32 ratio = 0x00010000*((f32)freq/(f32)DSP_DEFAULT_FREQ);
+	register u32 ratio = 0x00010000*(freq/DSP_DEFAULT_FREQ)+0.5f;
 	pb->freq_h = (u16)(ratio>>16);
 	pb->freq_l = (u16)(ratio&0xffff);
 }
@@ -567,7 +567,7 @@ void AESND_FreeVoice(AESNDPB *pb)
 	_CPU_ISR_Restore(level);
 }
 
-void AESND_PlayVoice(AESNDPB *pb,u32 format,const void *buffer,u32 len,u32 freq,u32 delay,bool looped)
+void AESND_PlayVoice(AESNDPB *pb,u32 format,const void *buffer,u32 len,f32 freq,u32 delay,bool looped)
 {
 	u32 level;
 	void *ptr = (void*)buffer;
@@ -619,7 +619,7 @@ void AESND_SetVoiceVolume(AESNDPB *pb,u16 volume_l,u16 volume_r)
 	_CPU_ISR_Restore(level);
 }
 
-void AESND_SetVoiceFrequency(AESNDPB *pb,u32 freq)
+void AESND_SetVoiceFrequency(AESNDPB *pb,f32 freq)
 {
 	u32 level;