1 files changed, 74 insertions, 0 deletions
diff --git a/src/GainControl.h b/src/GainControl.h
new file mode 100644
index 0000000..2f7b9d1
--- /dev/null
+++ b/src/GainControl.h
@@ -0,0 +1,74 @@
+/*
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
+   Her Majesty the Queen in Right of Canada (Communications Research
+   Center Canada)
+ */
+/*
+   This file is part of CRC-DADMOD.
+
+   CRC-DADMOD 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 3 of the
+   License, or (at your option) any later version.
+
+   CRC-DADMOD 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 CRC-DADMOD.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GAIN_CONTROL_H
+#define GAIN_CONTROL_H
+
+#ifdef HAVE_CONFIG_H
+#   include <config.h>
+#endif
+
+
+#include "ModCodec.h"
+
+
+#include <sys/types.h>
+#include <complex>
+#ifdef __SSE__
+#   include <xmmintrin.h>
+#endif
+
+
+typedef std::complex<float> complexf;
+
+enum GainMode { GAIN_FIX, GAIN_MAX, GAIN_VAR };
+
+class GainControl : public ModCodec
+{
+public:
+    GainControl(size_t frameSize, GainMode mode = GAIN_VAR, float factor = 1.0f);
+    virtual ~GainControl();
+    GainControl(const GainControl&);
+    GainControl& operator=(const GainControl&);
+
+
+    int process(Buffer* const dataIn, Buffer* dataOut);
+    const char* name() { return "GainControl"; }
+
+protected:
+    size_t d_frameSize;
+    float d_factor;
+#ifdef __SSE__
+    __m128 (*computeGain)(const __m128* in, size_t sizeIn);
+    __m128 static computeGainFix(const __m128* in, size_t sizeIn);
+    __m128 static computeGainMax(const __m128* in, size_t sizeIn);
+    __m128 static computeGainVar(const __m128* in, size_t sizeIn);
+#else // !__SSE__
+    float (*computeGain)(const complexf* in, size_t sizeIn);
+    float static computeGainFix(const complexf* in, size_t sizeIn);
+    float static computeGainMax(const complexf* in, size_t sizeIn);
+    float static computeGainVar(const complexf* in, size_t sizeIn);
+#endif // __SSE__
+};
+
+
+#endif // GAIN_CONTROL_H