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// -*-C++-*-
// This file is part of the gmod package
// Copyright (C) 1997 by Andrew J. Robinson
#ifdef AWE_SUPPORT
#include <stdlib.h>
#include <linux/ultrasound.h>
#include <linux/awe_voice.h>
#include "defines.h"
#include "structs.h"
#include "defines.h"
#include "Sample.h"
#include "VoiceAWE.h"
void syncTime();
int
VoiceAWE::doPreUpdates(int dev)
{
SEQ_DECLAREBUF();
if (!delayCount_)
{
if (whatChanged_ & (NOTE_CHANGED | OFFSET_CHANGED))
{
syncTime();
SEQ_STOP_NOTE(dev, channel_, 0, 127);
return 1;
}
}
return 0;
}
void
VoiceAWE::doUpdates(int dev)
{
SEQ_DECLAREBUF();
if (!delayCount_)
{
if (whatChanged_ & (SAMPLE_CHANGED | PAN_CHANGED | OFFSET_CHANGED |
KEY_CHANGED))
syncTime();
if (whatChanged_ & SAMPLE_CHANGED)
SEQ_SET_PATCH(dev, channel_, sample_->number());
if (whatChanged_ & PAN_CHANGED)
{
int panVal;
panVal = pan_ + (envelopePan_ - 32) * (128 - abs(128 - pan_)) / 32;
if (panVal > 255)
panVal = 255;
else if (panVal < 0)
panVal = 0;
if (panFactor_ != 100)
{
panVal -= 128;
panVal = (panVal * panFactor_) / 100;
panVal += 128;
}
SEQ_CONTROL(dev, channel_, CTL_PAN, panVal);
if (!(whatChanged_ & NOTE_CHANGED))
{
panVal = ((panVal * 2) - 240) / 32 + 7;
GUS_VOICEBALA(dev, channel_, panVal);
}
}
if (whatChanged_ & OFFSET_CHANGED)
{
SEQ_START_NOTE(dev, channel_, note_, 0);
GUS_VOICE_POS(dev, channel_, offset_);
lastVol_ = 0;
startNote(dev, 255);
}
else if (whatChanged_ & NOTE_CHANGED)
startNote(dev, note_);
else if (whatChanged_ & VOL_CHANGED)
startNote(dev, 255);
if (whatChanged_ & BEND_CHANGED)
{
int bend = pitchbender_ + vibraBend_ + arpegBend_ + finetune_;
if (bend != lastBend_)
{
lastBend_ = bend;
syncTime();
SEQ_BENDER(dev, channel_, bend + 8192);
}
}
if (whatChanged_ & KEY_CHANGED)
{
SEQ_STOP_NOTE(dev, channel_, 0, 127);
}
whatChanged_ = 0;
}
}
void
VoiceAWE::startNote(int dev, int note)
{
SEQ_DECLAREBUF();
int vol;
if (flagVol_)
vol = 0;
else
{
vol = ((((volume_ * envelopeVol_) / 64) + tremoloVol_) *
mainVolume_) / 255;
if (vol > 255)
vol = 255;
else if (vol < 0)
vol = 0;
}
if ((note != 255) || (vol != lastVol_))
{
lastVol_ = vol;
if (volType_ == VOL_LOG)
{
int newVolume;
unsigned char bits;
bits = (vol & 0xf0) >> 4;
newVolume = 1 << bits;
vol &= 0x0f;
if (bits >= 4)
{
newVolume |= (vol << (bits - 4));
for (bits -= 4; bits > 0; bits--)
newVolume |= (1 << (bits - 1));
}
else
newVolume |= (vol >> (4 - bits));
vol = (unsigned char)(newVolume / 256);
}
else
vol /= 2;
syncTime();
SEQ_CONTROL(dev, channel_, CTL_EXPRESSION, vol << 7);
SEQ_START_NOTE(dev, channel_, note, 127);
}
}
#endif
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