Version 1.0

Added: Configuration Editor, which allows to edit configurations in a graphical user interface. Contains GUIs for most commands supported by E-APO, but as lines can also be edited directly, all commands can be used.
Added: Command "GraphicEQ", which can act as a regular, fixed-band graphic equalizer (via the GUI) but also supports variable bands so that any desired frequency response can be specified. Internally, it is implemented via convolution with a generated IR.
Added: Command "Convolution", which allows to convolve the signal with a user-provided impulse response to achieve e.g. equalization or reverberation effects.
Improved: Configurator performs checks for registry values that are needed for the operation of E-APO, which may be changed by driver installations, fixing the values if necessary.
Improved: Configurator shows which is the default device as a hint to the user.

libHybridConv-0.1.1/hcTest.c

@@ -0,0 +1,138 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Christian Borss                                 *
+ *   christian.borss@rub.de                                                *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU Library General Public License as       *
+ *   published by the Free Software Foundation; either version 2 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 General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this program; if not, write to the                 *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+
+#include "libHybridConv.h"
+#include <math.h>
+
+
+int main(void)
+{
+	int s, m, l;
+	int sflen, mflen, lflen;
+	int num;
+	double tau_1, tau_16;
+	double cpu_load;
+	double c0[9];
+	double c1[9];
+	double tau_s, tau_m, tau_l;
+	int num_s, num_m, num_l;
+	int hlen = 96000;
+	int f_s = 48000;
+
+	// performance measurement with uniform segmentation
+	for (s = 0; s < 9; s++)
+	{
+		sflen = 64 << s;
+		num = 1;
+		printf("%5d / %2d    ", sflen, num);
+		tau_1 = getProcTime(sflen, num, 2.0);
+		num = 16;
+		printf("%5d / %2d    ", sflen, num);
+		tau_16 = getProcTime(sflen, num, 2.0);
+		c1[s] = (tau_16 - tau_1) / 15.0;
+		c0[s] = tau_1 - c1[s];
+		printf("\n");
+	}
+	printf("\n");
+
+	// performance prediction with 3 segment lengths
+	for (s = 0; s < 5; s++)
+	{
+		for (m = 1; m < 5; m++)
+		{
+			for (l = 1; l+m+s < 9; l++)
+			{
+				sflen = 64 << s;
+				mflen = sflen << m;
+				lflen = mflen << l;
+
+				num_s = mflen / sflen;
+				num_m = 2 * lflen / mflen;
+				num_l = ceil((hlen - num_s * sflen - num_m * mflen) / (double)lflen);
+				tau_s = c0[s]     + c1[s]     * num_s;
+				tau_m = c0[s+m]   + c1[s+m]   * num_m;
+				tau_l = c0[s+m+l] + c1[s+m+l] * num_l;
+
+				cpu_load = 100.0 * (tau_s * lflen / sflen + tau_m * lflen / mflen + tau_l) * f_s / (double)lflen;
+
+				printf("%4d / %4d / %4d    ", sflen, mflen, lflen);
+				printf("Predicted CPU load: %5.2f %%\n", cpu_load);
+			}
+		}
+		printf("\n");
+	}
+	printf("\n");
+
+	// performance prediction with 2 segment lengths
+	for (m = 0; m < 8; m++)
+	{
+		for (l = 1; l+m < 9; l++)
+		{
+			mflen = 64 << m;
+			lflen = mflen << l;
+
+			num_m = 2 * lflen / mflen;
+			num_l = ceil((hlen - num_m * mflen) / (double)lflen);
+			tau_m = c0[m]   + c1[m]   * num_m;
+			tau_l = c0[m+l] + c1[m+l] * num_l;
+
+			cpu_load = 100.0 * (tau_m * lflen / mflen + tau_l) * f_s / (double)lflen;
+
+			printf("     / %4d / %4d    ", mflen, lflen);
+			printf("Predicted CPU load: %5.2f %%\n", cpu_load);
+		}
+		printf("\n");
+	}
+	printf("\n");
+
+	// performance prediction with 1 segment lengths
+	for (l = 0; l < 9; l++)
+	{
+		lflen = 64 << l;
+
+		num_l = ceil(hlen / (double)lflen);
+		tau_l = c0[l] + c1[l] * num_l;
+
+		cpu_load = 100.0 * tau_l * f_s / (double)lflen;
+
+		printf("     /      / %4d    ", lflen);
+		printf("Predicted CPU load: %5.2f %%\n", cpu_load);
+	}
+	printf("\n");
+
+	for (s = 0; s < 5; s++)
+	{
+		for (m = 1; m < 5; m++)
+		{
+			for (l = 1; l+m+s < 9; l++)
+			{
+				sflen = 64 << s;
+				mflen = sflen << m;
+				lflen = mflen << l;
+				printf("%4d / %4d / %4d    ", sflen, mflen, lflen);
+				hcBenchmarkTripple(sflen, mflen, lflen);
+			}
+		}
+		printf("\n");
+	}
+
+	return 0;
+}