1 files changed, 83 insertions, 0 deletions
diff --git a/muse_qt4_evolution/al/dsp.h b/muse_qt4_evolution/al/dsp.h
new file mode 100644
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+++ b/muse_qt4_evolution/al/dsp.h
@@ -0,0 +1,83 @@
+//=============================================================================
+//  AL
+//  Audio Utility Library
+//  $Id:$
+//
+//  Copyright (C) 2002-2006 by Werner Schweer and others
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License version 2.
+//
+//  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.
+//=============================================================================
+
+#ifndef __DSP_H__
+#define __DSP_H__
+
+namespace AL {
+
+//---------------------------------------------------------
+//   f_max
+//---------------------------------------------------------
+
+static inline float f_max(float x, float a)
+      {
+      x -= a;
+      x += fabsf(x);
+      x *= 0.5f;
+      x += a;
+      return x;
+      }
+
+//---------------------------------------------------------
+//   Dsp
+//    standard version of all dsp routines without any
+//    hw acceleration
+//---------------------------------------------------------
+
+class Dsp {
+   public:
+      Dsp() {}
+      virtual ~Dsp() {}
+
+      virtual float peak(float* buf, unsigned n, float current) {
+            for (unsigned i = 0; i < n; ++i)
+                  current = f_max(current, fabsf(buf[i]));
+            return current;
+            }
+      virtual void applyGainToBuffer(float* buf, unsigned n, float gain) {
+            for (unsigned i = 0; i < n; ++i)
+                  buf[i] *= gain;
+            }
+      virtual void mixWithGain(float* dst, float* src, unsigned n, float gain) {
+            for (unsigned i = 0; i < n; ++i)
+                  dst[i] += src[i] * gain;
+            }
+      virtual void mix(float* dst, float* src, unsigned n) {
+            for (unsigned i = 0; i < n; ++i)
+                  dst[i] += src[i];
+            }
+      virtual void cpy(float* dst, float* src, unsigned n) {
+#if defined(ARCH_X86) || defined(ARCH_X86_64)
+            register unsinged long int dummy;
+            __asm__ __volatile__ "rep; movsl" :"=&D"(dst), "=&S"(src), "=&c"(dummy) :"0" (to), "1" (from),"2" (n) : "memory");
+#else
+            memcpy(dst, src, sizeof(float) * n);
+#endif
+            }
+      };
+
+extern void initDsp();
+extern Dsp* dsp;
+
+}
+
+#endif
+