1 files changed, 120 insertions, 0 deletions
diff --git a/muse_qt4_evolution/al/dsp.cpp b/muse_qt4_evolution/al/dsp.cpp
new file mode 100644
index 00000000..7fb41fe7
--- /dev/null
+++ b/muse_qt4_evolution/al/dsp.cpp
@@ -0,0 +1,120 @@
+//=============================================================================
+//  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.
+//=============================================================================
+
+#include "dsp.h"
+#include "config.h"
+
+namespace AL {
+
+Dsp* dsp;
+
+#ifdef __i386__
+
+//---------------------------------------------------------
+//   DspSSE86
+//---------------------------------------------------------
+
+extern "C" {
+extern float x86_sse_compute_peak(float*, unsigned, float);
+extern void x86_sse_apply_gain_to_buffer(float*, unsigned, float);
+extern void x86_sse_mix_buffers_with_gain(float*, float*, unsigned, float);
+extern void x86_sse_mix_buffers_no_gain(float*, float*, unsigned);
+   };
+
+class DspSSE86 : public Dsp {
+   public:
+      DspSSE86() {}
+      virtual ~DspSSE86() {}
+
+      virtual float peak(float* buf, unsigned n, float current) {
+            if ( ((intptr_t)buf % 16) != 0) {
+                  fprintf(stderr, "peak(): buffer unaligned! (%p)\n", buf);
+                  return Dsp::peak(buf, n, current);
+                  }
+            return x86_sse_compute_peak(buf, n, current);
+            }
+
+      virtual void applyGainToBuffer(float* buf, unsigned n, float gain) {
+            if ( ((intptr_t)buf % 16) != 0) {
+                  fprintf(stderr, "applyGainToBuffer(): buffer unaligned! (%p)\n", buf);
+                  Dsp::applyGainToBuffer(buf, n, gain);
+                  }
+            else
+                  x86_sse_apply_gain_to_buffer(buf, n, gain);
+            }
+
+      virtual void mixWithGain(float* dst, float* src, unsigned n, float gain) {
+            if ( ((intptr_t)dst & 15) != 0)
+                  fprintf(stderr, "mixWithGainain(): dst unaligned! (%p)\n", dst);
+            if (((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
+                  fprintf(stderr, "mixWithGain(): dst & src don't have the same alignment!\n");
+                  Dsp::mixWithGain(dst, src,n, gain);
+                  }
+            else
+                  x86_sse_mix_buffers_with_gain(dst, src, n, gain);
+            }
+      virtual void mix(float* dst, float* src, unsigned n) {
+            if ( ((intptr_t)dst & 15) != 0)
+                  fprintf(stderr, "mix_buffers_no_gain(): dst unaligned! %p\n", dst);
+            if ( ((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
+                  fprintf(stderr, "mix_buffers_no_gain(): dst & src don't have the same alignment!\n");
+                  Dsp::mix(dst, src, n);
+                  }
+            else
+                  x86_sse_mix_buffers_no_gain(dst, src, n);
+            }
+      };
+#endif
+
+//---------------------------------------------------------
+//   initDsp
+//---------------------------------------------------------
+
+void initDsp()
+      {
+#if defined(__i386__) && defined(USE_SSE)
+      unsigned long useSSE = 0;
+
+#ifdef __x86_64__
+      useSSE = 1 << 25;       // we know the platform has SSE
+#else
+      asm (
+         "mov $1, %%eax\n"
+         "pushl %%ebx\n"
+         "cpuid\n"
+         "movl %%edx, %0\n"
+         "popl %%ebx\n"
+         : "=r" (useSSE)
+         :
+         : "%eax", "%ecx", "%edx", "memory");
+#endif
+      useSSE &= (1 << 25); // bit 25 = SSE support
+      if (useSSE) {
+            printf("Using SSE optimized routines\n");
+            dsp = new DspSSE86();
+            return;
+            }
+      // fall through to not hardware optimized routines
+#endif
+      dsp = new Dsp();
+      }
+
+}
+