AUDIO: Changed several places that use PI to use M_PI instead

4 files changed, 7 insertions, 7 deletions

diff --git a/audio/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp b/audio/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp
index f84fd841a6..67de8fa026 100644
--- a/audio/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp
+++ b/audio/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp
@@ -1253,7 +1253,7 @@ void TownsPC98_FmSynth::generateTables() {
 	delete[] _oprSinTbl;
 	_oprSinTbl = new uint32[1024];
 	for (int i = 0; i < 1024; i++) {
-		double val = sin((double)(((i << 1) + 1) * PI / 1024.0));
+		double val = sin((double)(((i << 1) + 1) * M_PI / 1024.0));
 		double d_dcb = log(1.0 / (double)ABS(val)) / log(2.0) * 256.0;
 		int32 i_dcb = (int32)(2.0 * d_dcb);
 		i_dcb = (i_dcb & 1) ? (i_dcb >> 1) + 1 : (i_dcb >> 1);
diff --git a/audio/softsynth/opl/mame.cpp b/audio/softsynth/opl/mame.cpp
index c875080e8f..b4bbcb5ab3 100644
--- a/audio/softsynth/opl/mame.cpp
+++ b/audio/softsynth/opl/mame.cpp
@@ -708,7 +708,7 @@ static int OPLOpenTable(void) {
 	/* degree 0 = degree 180                   = off */
 	SIN_TABLE[0] = SIN_TABLE[SIN_ENT /2 ] = &TL_TABLE[EG_ENT - 1];
 	for (s = 1;s <= SIN_ENT / 4; s++) {
-		pom = sin(2 * PI * s / SIN_ENT); /* sin     */
+		pom = sin(2 * M_PI * s / SIN_ENT); /* sin     */
 		pom = 20 * log10(1 / pom);	   /* decibel */
 		j = int(pom / EG_STEP);         /* TL_TABLE steps */
 
@@ -739,14 +739,14 @@ static int OPLOpenTable(void) {
 	ENV_CURVE[EG_OFF >> ENV_BITS]= EG_ENT - 1;
 	/* make LFO ams table */
 	for (i=0; i < AMS_ENT; i++) {
-		pom = (1.0 + sin(2 * PI * i / AMS_ENT)) / 2; /* sin */
+		pom = (1.0 + sin(2 * M_PI * i / AMS_ENT)) / 2; /* sin */
 		AMS_TABLE[i]         = (int)((1.0 / EG_STEP) * pom); /* 1dB   */
 		AMS_TABLE[AMS_ENT + i] = (int)((4.8 / EG_STEP) * pom); /* 4.8dB */
 	}
 	/* make LFO vibrate table */
 	for (i=0; i < VIB_ENT; i++) {
 		/* 100cent = 1seminote = 6% ?? */
-		pom = (double)VIB_RATE * 0.06 * sin(2 * PI * i / VIB_ENT); /* +-100sect step */
+		pom = (double)VIB_RATE * 0.06 * sin(2 * M_PI * i / VIB_ENT); /* +-100sect step */
 		VIB_TABLE[i]         = (int)(VIB_RATE + (pom * 0.07)); /* +- 7cent */
 		VIB_TABLE[VIB_ENT + i] = (int)(VIB_RATE + (pom * 0.14)); /* +-14cent */
 	}
diff --git a/audio/softsynth/pcspk.cpp b/audio/softsynth/pcspk.cpp
index 69ba113c8b..947c142b73 100644
--- a/audio/softsynth/pcspk.cpp
+++ b/audio/softsynth/pcspk.cpp
@@ -109,7 +109,7 @@ int8 PCSpeaker::generateSine(uint32 x, uint32 oscLength) {
 		return 0;
 
 	// TODO: Maybe using a look-up-table would be better?
-	return CLIP<int16>((int16) (128 * sin(2.0 * PI * x / oscLength)), -128, 127);
+	return CLIP<int16>((int16) (128 * sin(2.0 * M_PI * x / oscLength)), -128, 127);
 }
 
 int8 PCSpeaker::generateSaw(uint32 x, uint32 oscLength) {
diff --git a/audio/softsynth/ym2612.cpp b/audio/softsynth/ym2612.cpp
index 94fcfb97db..6b3c2aab73 100644
--- a/audio/softsynth/ym2612.cpp
+++ b/audio/softsynth/ym2612.cpp
@@ -677,14 +677,14 @@ void MidiDriver_YM2612::createLookupTables() {
 		int i;
 		sintbl = new int [2048];
 		for (i = 0; i < 2048; i++)
-			sintbl[i] = (int)(0xffff * sin(i/2048.0*2.0*PI));
+			sintbl[i] = (int)(0xffff * sin(i/2048.0 * 2.0 * M_PI));
 	}
 
 	{
 		int i;
 		powtbl = new int [1025];
 		for (i = 0; i <= 1024; i++)
-			powtbl[i] = (int)(0x10000 * pow(2.0, (i-512)/512.0));
+			powtbl[i] = (int)(0x10000 * pow(2.0, (i - 512) / 512.0));
 	}
 
 	{