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Better stereo suppport in OPL3 emulator

Browse source 
Patch from Nuke.YKT

git-svn-id: https://svn.eduke32.com/eduke32@8237 1a8010ca-5511-0410-912e-c29ae57300e0

# Conflicts:
#	source/audiolib/include/opl3.h
#	source/audiolib/src/opl3.cpp
This commit is contained in:
terminx 2019-10-20 11:41:45 +00:00 committed by Christoph Oelckers
parent 9b97f504bb
commit e82ddb23d3
1 changed files with 30 additions and 137 deletions
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143
source/audiolib/src/driver_adlib.cpp
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@ -199,7 +199,6 @@ static AdLibChannel Channel[NUMADLIBCHANNELS];
static int AL_LeftPort = ADLIB_PORT;
static int AL_RightPort = ADLIB_PORT;
int AL_Stereo = TRUE;
static int AL_SendStereo;
static int AL_MaxMidiChannel = 16;
// TODO: clean up this shit...
@ -251,16 +250,8 @@ static void AL_SendOutputToPort(int const port, int const reg, int const data)
static void AL_SendOutput(int const voice, int const reg, int const data)
{
if (AL_SendStereo)
{
AL_SendOutputToPort(AL_LeftPort, reg, data);
AL_SendOutputToPort(AL_RightPort, reg, data);
}
else
{
int port = (voice == 0) ? AL_RightPort : AL_LeftPort;
AL_SendOutputToPort(port, reg, data);
}
}
@ -298,12 +289,6 @@ static void AL_SetVoiceTimbre(int const voice)
AL_SendOutput(port, 0x40 + off, timbre->Level[0]);
slot = slotVoice[voc][1];
if (AL_SendStereo)
{
AL_SendOutputToPort(AL_LeftPort, 0xC0 + voice, (timbre->Feedback & 0x0f) | 0x20);
AL_SendOutputToPort(AL_RightPort, 0xC0 + voice, (timbre->Feedback & 0x0f) | 0x10);
}
else
AL_SendOutput(port, 0xC0 + voc, (timbre->Feedback & 0x0f) | 0x30);
off = offsetSlot[slot];
@ -337,8 +322,6 @@ static void AL_SetVoiceVolume(int const voice)
auto t1 = (uint32_t)VoiceLevel[slot][port] * (velocity + 0x80);
t1 = (Channel[channel].Volume * t1) >> 15;
if (!AL_SendStereo)
{
uint32_t volume = t1 ^ 63;
volume |= (uint32_t)VoiceKsl[slot][port];
@ -357,70 +340,6 @@ static void AL_SetVoiceVolume(int const voice)
AL_SendOutput(port, 0x40 + offsetSlot[slot], volume);
}
return;
}
// Set left channel volume
uint32_t volume = t1;
if (Channel[channel].Pan < 64)
{
volume *= Channel[channel].Pan;
volume >>= 6;
}
volume ^= 63;
volume |= (uint32_t)VoiceKsl[slot][port];
AL_SendOutputToPort(AL_LeftPort, 0x40 + offsetSlot[slot], volume);
// Set right channel volume
volume = t1;
if (Channel[channel].Pan > 64)
{
volume *= 127 - Channel[channel].Pan;
volume >>= 6;
}
volume ^= 63;
volume |= (uint32_t)VoiceKsl[slot][port];
AL_SendOutputToPort(AL_RightPort, 0x40 + offsetSlot[slot], volume);
// Check if this timbre is Additive
if (timbre->Feedback & 0x01)
{
// amplitude
auto t2 = (Channel[channel].Volume * t1) >> 15;
int const slot = slotVoice[voc][0];
// Set left channel volume
volume = t2;
if (Channel[channel].Pan < 64)
{
volume *= Channel[channel].Pan;
volume >>= 6;
}
volume ^= 63;
volume |= (uint32_t)VoiceKsl[slot][port];
AL_SendOutputToPort(AL_LeftPort, 0x40 + offsetSlot[slot], volume);
// Set right channel volume
volume = t2;
if (Channel[channel].Pan > 64)
{
volume *= 127 - Channel[channel].Pan;
volume >>= 6;
}
volume ^= 63;
volume |= (uint32_t)VoiceKsl[slot][port];
AL_SendOutputToPort(AL_RightPort, 0x40 + offsetSlot[slot], volume);
}
}
@ -485,40 +404,18 @@ static void AL_SetVoicePitch(int const voice)
pitch |= Voice[voice].status;
if (!AL_SendStereo)
{
AL_SendOutput(port, 0xA0 + voc, pitch);
AL_SendOutput(port, 0xB0 + voc, pitch >> 8);
}
else
{
AL_SendOutputToPort(AL_LeftPort, 0xA0 + voice, pitch);
AL_SendOutputToPort(AL_LeftPort, 0xB0 + voice, pitch >> 8);
}
if (channel != 9)
detune += STEREO_DETUNE;
static void AL_SetVoicePan(int const voice)
{
int const port = Voice[voice].port;
int const voc = (voice >= NUMADLIBVOICES) ? voice - NUMADLIBVOICES : voice;
int const channel = Voice[voice].channel;
if (detune > FINETUNE_MAX)
{
detune -= FINETUNE_RANGE;
if (note < MAX_NOTE)
{
note++;
ScaleNote = NoteMod12[note];
Octave = NoteDiv12[note];
}
}
pitch = OctavePitch[Octave] | NotePitch[detune][ScaleNote];
Voice[voice].pitchright = pitch;
pitch |= Voice[voice].status;
AL_SendOutputToPort(AL_RightPort, 0xA0 + voice, pitch);
AL_SendOutputToPort(AL_RightPort, 0xB0 + voice, pitch >> 8);
}
if (AL_Stereo)
AL_SendOutput(port, 0xD0 + voc, Channel[channel].Pan << 1);
}
@ -541,6 +438,13 @@ static void AL_SetChannelPan(int const channel, int const pan)
// Don't pan drum sounds
if (channel != 9)
Channel[channel].Pan = pan;
auto voice = Channel[channel].Voices.start;
while (voice != nullptr)
{
AL_SetVoicePan(voice->num);
voice = voice->next;
}
}
@ -552,7 +456,7 @@ static void AL_ResetVoices(void)
Voice_Pool.start = nullptr;
Voice_Pool.end = nullptr;
int const numvoices = AL_Stereo ? NUMADLIBVOICES : NUMADLIBVOICES * 2;
int const numvoices = NUMADLIBVOICES * 2;
for (int index = 0; index < numvoices; index++)
{
@ -649,12 +553,7 @@ static void AL_Reset(void)
void AL_SetStereo(int const stereo)
{
if (stereo == AL_SendStereo)
return;
AL_SendStereo = stereo;
AL_SendOutputToPort(AL_RightPort, 0x5, AL_SendStereo);
AL_Reset();
AL_SendOutputToPort(AL_RightPort, 0x5, (stereo<<1)+1);
}
@ -676,12 +575,6 @@ static void AL_NoteOff(int const channel, int const key, int velocity)
int port = Voice[voice].port;
int voc = (voice >= NUMADLIBVOICES) ? voice - NUMADLIBVOICES : voice;
if (AL_SendStereo)
{
AL_SendOutputToPort(AL_LeftPort, 0xB0 + voice, hibyte(Voice[voice].pitchleft));
AL_SendOutputToPort(AL_RightPort, 0xB0 + voice, hibyte(Voice[voice].pitchright));
}
else
AL_SendOutput(port, 0xB0 + voc, hibyte(Voice[voice].pitchleft));
LL_Remove(AdLibVoice, &Channel[channel].Voices, &Voice[voice]);
@ -725,6 +618,7 @@ static void AL_NoteOn(int const channel, int const key, int const velocity)
AL_SetVoiceTimbre(voice);
AL_SetVoiceVolume(voice);
AL_SetVoicePitch(voice);
AL_SetVoicePan(voice);
}
@ -834,7 +728,6 @@ static void AL_SetPitchBend(int const channel, int const lsb, int const msb)
static void AL_Shutdown(void)
{
AL_SetStereo(FALSE);
AL_ResetVoices();
AL_Reset();
}