1 files changed, 84 insertions, 0 deletions
diff --git a/lib/iir.h b/lib/iir.h
new file mode 100644
index 000000000..de6fa04e5
--- /dev/null
+++ b/lib/iir.h
@@ -0,0 +1,84 @@
+/*
+ *   PCM time-domain equalizer
+ *
+ *   Copyright (C) 2002-2005  Felipe Rivera <liebremx at users.sourceforge.net>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU 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 General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *   $Id: iir.h,v 1.12 2005/10/17 01:57:59 liebremx Exp $
+ */
+#ifndef IIR_H
+#define IIR_H
+
+//#include <glib.h>
+//#include "main.h"
+#include "iir_cfs.h"
+
+/*
+ * Flush-to-zero to avoid flooding the CPU with underflow exceptions 
+ */
+#ifdef SSE_MATH
+#define FTZ 0x8000
+#define FTZ_ON { \
+    unsigned int mxcsr; \
+  __asm__  __volatile__ ("stmxcsr %0" : "=m" (*&mxcsr)); \
+  mxcsr |= FTZ; \
+  __asm__  __volatile__ ("ldmxcsr %0" : : "m" (*&mxcsr)); \
+}
+#define FTZ_OFF { \
+    unsigned int mxcsr; \
+  __asm__  __volatile__ ("stmxcsr %0" : "=m" (*&mxcsr)); \
+  mxcsr &= ~FTZ; \
+  __asm__  __volatile__ ("ldmxcsr %0" : : "m" (*&mxcsr)); \
+}
+#else
+#define FTZ_ON
+#define FTZ_OFF
+#endif
+
+/*
+ * Function prototypes
+ */
+void init_iir();
+void clean_history();
+void set_gain(int index, int chn, float val);
+void set_preamp(int chn, float val);
+
+
+__inline__ int iir(void *d, int length, int nch);
+
+#ifdef ARCH_X86
+__inline__ int round_trick(float floatvalue_to_round);
+#endif
+#ifdef ARCH_PPC
+__inline__ int round_ppc(float x);
+#endif
+
+#define EQ_CHANNELS 2
+#define EQ_MAX_BANDS 10
+
+extern float preamp[EQ_CHANNELS];
+extern sIIRCoefficients *iir_cf;
+extern int rate;
+extern int band_count;
+
+#ifdef BENCHMARK
+extern double timex;
+extern int count;
+extern unsigned int blength;
+#endif
+
+#endif /* #define IIR_H */
+