valter/dosbox-staging
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add dbopl to vs project file;

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fix internal opl rate of dbopl;
change opl provider selection and default


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3358
This commit is contained in:
Sebastian Strohhäcker 2009-04-26 15:37:04 +00:00
parent 423fe84280
commit 4ebdd5114a
4 changed files with 21 additions and 15 deletions
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8
src/hardware/dbopl.cpp
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@ -48,7 +48,7 @@
namespace DBOPL {
#define MAX_SAMPLES 256
#define OPLRATE 50000
#define OPLRATE ((double)(14318180.0 / 288.0))
//Only need 4 valid bits at the top for vibrato
#define VIBRATO_SH ( 32 - 4 )
@ -1183,13 +1183,13 @@ void Chip::Setup( Bit32u rate ) {
//10 bits of frequency counter
//With higher octave this gets shifted up
//-1 since the freqCreateTable = *2
double scale = ((double)OPLRATE * (double)( 1 << ( WAVE_SH - 10 - 1))) / rate;
double scale = (OPLRATE * (double)( 1 << ( WAVE_SH - 10 - 1))) / rate;
for ( int i = 0; i < 16; i++ ) {
//Use rounding with 0.5
freqMul[i] = (Bit32u)( 0.5 + scale * FreqCreateTable[ i ] );
}
scale = (double)OPLRATE / rate;
scale = OPLRATE / rate;
//-3 since the real envelope takes 8 steps to reach the single value we supply
for ( Bit8u i = 0; i < 76; i++ ) {
Bit8u index, shift;
@ -1464,4 +1464,4 @@ void Handler::Init( Bitu rate ) {
}
}; //Namespace Kiet
}; //Namespace DBOPL