diff options
Diffstat (limited to 'src/chips/dosbox/dbopl.cpp')
| -rw-r--r-- | src/chips/dosbox/dbopl.cpp | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/chips/dosbox/dbopl.cpp b/src/chips/dosbox/dbopl.cpp index 7d78c5f..903c1bb 100644 --- a/src/chips/dosbox/dbopl.cpp +++ b/src/chips/dosbox/dbopl.cpp @@ -757,6 +757,11 @@ void Channel::WriteC0(const Chip* chip, Bit8u val) { UpdateSynth(chip); } +void Channel::WritePan(Bit8u val) { + panLeft = (Bit16u)(cos((float)val * (PI / 2.0f / 127.0f)) * 65535.0f); + panRight = (Bit16u)(sin((float)val * (PI / 2.0f / 127.0f)) * 65535.0f); +} + void Channel::UpdateSynth( const Chip* chip ) { //Select the new synth mode if ( chip->opl3Active ) { @@ -971,8 +976,8 @@ Channel* Channel::BlockTemplate( Chip* chip, Bit32u samples, Bit32s* output ) { case sm3AMFM: case sm3FMAM: case sm3AMAM: - output[ i * 2 + 0 ] += sample & maskLeft; - output[ i * 2 + 1 ] += sample & maskRight; + output[ i * 2 + 0 ] += (sample * panLeft / 65535) & maskLeft; + output[ i * 2 + 1 ] += (sample * panRight / 65535) & maskRight; break; default: break; @@ -1388,6 +1393,10 @@ void Chip::Setup( Bit32u rate ) { WriteReg( i, 0xff ); WriteReg( i, 0x0 ); } + + for ( int i = 0; i < 18; i++ ) { + chan[i].WritePan( 0x40 ); + } } static bool doneTables = false; @@ -1614,5 +1623,14 @@ void Handler::Init( Bitu rate ) { chip.Setup( static_cast<Bit32u>(rate) ); } +void Handler::WritePan( Bit32u reg, Bit8u val ) +{ + Bitu index; + index = ((reg >> 4) & 0x10) | (reg & 0xf); + if (ChanOffsetTable[index]) { + Channel* regChan = (Channel*)(((char *)&chip) + ChanOffsetTable[index]); + regChan->WritePan(val); + } +} } //Namespace DBOPL |