MT-32: Sync with the latest changes in munt

1 files changed, 0 insertions, 142 deletions

diff --git a/audio/softsynth/mt32/DelayReverb.cpp b/audio/softsynth/mt32/DelayReverb.cpp
deleted file mode 100644
index d80c98acbc..0000000000
--- a/audio/softsynth/mt32/DelayReverb.cpp
+++ /dev/null
@@ -1,142 +0,0 @@
-/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
- * Copyright (C) 2011, 2012, 2013 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
- *
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU Lesser General Public License as published by
- *  the Free Software Foundation, either version 2.1 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU Lesser General Public License for more details.
- *
- *  You should have received a copy of the GNU Lesser General Public License
- *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-//#include <cmath>
-//#include <cstring>
-#include "mt32emu.h"
-#include "DelayReverb.h"
-
-namespace MT32Emu {
-
-// CONFIRMED: The values below are found via analysis of digital samples and tracing reverb RAM address / data lines. Checked with all time and level combinations.
-// Obviously:
-// rightDelay = (leftDelay - 2) * 2 + 2
-// echoDelay = rightDelay - 1
-// Leaving these separate in case it's useful for work on other reverb modes...
-static const Bit32u REVERB_TIMINGS[8][3]= {
-	// {leftDelay, rightDelay, feedbackDelay}
-	{402, 802, 801},
-	{626, 1250, 1249},
-	{962, 1922, 1921},
-	{1490, 2978, 2977},
-	{2258, 4514, 4513},
-	{3474, 6946, 6945},
-	{5282, 10562, 10561},
-	{8002, 16002, 16001}
-};
-
-// Reverb amp is found as dryAmp * wetAmp
-static const Bit32u REVERB_AMP[8] = {0x20*0x18, 0x50*0x18, 0x50*0x28, 0x50*0x40, 0x50*0x60, 0x50*0x80, 0x50*0xA8, 0x50*0xF8};
-static const Bit32u REVERB_FEEDBACK67 = 0x60;
-static const Bit32u REVERB_FEEDBACK = 0x68;
-static const float LPF_VALUE = 0x68 / 256.0f;
-
-static const Bit32u BUFFER_SIZE = 16384;
-
-DelayReverb::DelayReverb() {
-	buf = NULL;
-	setParameters(0, 0);
-}
-
-DelayReverb::~DelayReverb() {
-	delete[] buf;
-}
-
-void DelayReverb::open() {
-	if (buf == NULL) {
-		delete[] buf;
-
-		buf = new float[BUFFER_SIZE];
-
-		recalcParameters();
-
-		// mute buffer
-		bufIx = 0;
-		if (buf != NULL) {
-			for (unsigned int i = 0; i < BUFFER_SIZE; i++) {
-				buf[i] = 0.0f;
-			}
-		}
-	}
-}
-
-void DelayReverb::close() {
-	delete[] buf;
-	buf = NULL;
-}
-
-// This method will always trigger a flush of the buffer
-void DelayReverb::setParameters(Bit8u newTime, Bit8u newLevel) {
-	time = newTime;
-	level = newLevel;
-	recalcParameters();
-}
-
-void DelayReverb::recalcParameters() {
-	// Number of samples between impulse and eventual appearance on the left channel
-	delayLeft = REVERB_TIMINGS[time][0];
-	// Number of samples between impulse and eventual appearance on the right channel
-	delayRight = REVERB_TIMINGS[time][1];
-	// Number of samples between a response and that response feeding back/echoing
-	delayFeedback = REVERB_TIMINGS[time][2];
-
-	if (level < 3 || time < 6) {
-		feedback = REVERB_FEEDBACK / 256.0f;
-	} else {
-		feedback = REVERB_FEEDBACK67 / 256.0f;
-	}
-
-	// Overall output amp
-	amp = (level == 0 && time == 0) ? 0.0f : REVERB_AMP[level] / 65536.0f;
-}
-
-void DelayReverb::process(const float *inLeft, const float *inRight, float *outLeft, float *outRight, unsigned long numSamples) {
-	if (buf == NULL) return;
-
-	for (unsigned int sampleIx = 0; sampleIx < numSamples; sampleIx++) {
-		// The ring buffer write index moves backwards; reads are all done with positive offsets.
-		Bit32u bufIxPrev = (bufIx + 1) % BUFFER_SIZE;
-		Bit32u bufIxLeft = (bufIx + delayLeft) % BUFFER_SIZE;
-		Bit32u bufIxRight = (bufIx + delayRight) % BUFFER_SIZE;
-		Bit32u bufIxFeedback = (bufIx + delayFeedback) % BUFFER_SIZE;
-
-		// Attenuated input samples and feedback response are directly added to the current ring buffer location
-		float lpfIn = amp * (inLeft[sampleIx] + inRight[sampleIx]) + feedback * buf[bufIxFeedback];
-
-		// Single-pole IIR filter found on real devices
-		buf[bufIx] = buf[bufIxPrev] * LPF_VALUE - lpfIn;
-
-		outLeft[sampleIx] = buf[bufIxLeft];
-		outRight[sampleIx] = buf[bufIxRight];
-
-		bufIx = (BUFFER_SIZE + bufIx - 1) % BUFFER_SIZE;
-	}
-}
-
-bool DelayReverb::isActive() const {
-	if (buf == NULL) return false;
-
-	float *b = buf;
-	float max = 0.001f;
-	for (Bit32u i = 0; i < BUFFER_SIZE; i++) {
-		if ((*b < -max) || (*b > max)) return true;
-		b++;
-	}
-	return false;
-}
-
-}