1 files changed, 107 insertions, 0 deletions
diff --git a/muse2/al/dsp.h b/muse2/al/dsp.h
new file mode 100644
index 00000000..f88a0122
--- /dev/null
+++ b/muse2/al/dsp.h
@@ -0,0 +1,107 @@
+//=============================================================================
+//  AL
+//  Audio Utility Library
+//  $Id: dsp.h,v 1.1.2.1 2009/12/06 01:39:33 terminator356 Exp $
+//
+//  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__
+
+#include <string.h>
+#include <math.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);
+/*      
+      {
+// Changed by T356. Not defined. Where are these???
+//#if defined(ARCH_X86) || defined(ARCH_X86_64)
+#if defined(__i386__) || defined(__x86_64__)
+            printf("Dsp: using asm cpy\n");
+            // Changed by T356. Get To and From not declared in scope compile errors.
+            register unsigned long int dummy;
+            //__asm__ __volatile__ ("rep; movsl" :"=&D"(dst), "=&S"(src), "=&c"(dummy) :"0" (to), "1" (from),"2" (n) : "memory");
+            // From http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html            
+            __asm__ __volatile__ (                              \
+                       "cld\n\t"                                \
+                       "rep\n\t"                                \
+                       "movsl"                                  \
+                       :                                        \
+                       : "S" (src), "D" (dst), "c" (n)       \
+                       : "memory"                
+                       );
+
+                       //: "%ecx", "%esi", "%edi", "memory"                
+#else
+            printf("Dsp: using memcpy\n");
+            memcpy(dst, src, sizeof(float) * n);
+#endif
+            }
+*/            
+            
+      };
+
+extern void initDsp();
+extern void exitDsp();
+extern Dsp* dsp;
+
+}
+
+#endif
+