Extract ChannelDecimator into separate files.

firmware/baseband/channel_decimator.hpp

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+/*
+ * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
+ *
+ * This file is part of PortaPack.
+ *
+ * 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, 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; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __CHANNEL_DECIMATOR_H__
+#define __CHANNEL_DECIMATOR_H__
+
+#include "buffer.hpp"
+#include "complex.hpp"
+
+#include "dsp_decimate.hpp"
+
+#include <array>
+
+class ChannelDecimator {
+public:
+	enum class DecimationFactor {
+		By4,
+		By8,
+		By16,
+		By32,
+	};
+
+	ChannelDecimator(
+		DecimationFactor f
+	) : decimation_factor { f }
+	{
+	}
+
+	void set_decimation_factor(const DecimationFactor f) {
+		decimation_factor = f;
+	}
+
+	buffer_c16_t execute(buffer_c8_t buffer) {
+		auto decimated = execute_decimation(buffer);
+
+		return decimated;
+	}
+
+private:
+	std::array<complex16_t, 1024> work_baseband;
+
+	const buffer_c16_t work_baseband_buffer {
+		work_baseband.data(),
+		work_baseband.size()
+	};
+	const buffer_s16_t work_audio_buffer {
+		(int16_t*)work_baseband.data(),
+		sizeof(work_baseband) / sizeof(int16_t)
+	};
+
+	//const bool fs_over_4_downconvert = true;
+
+	dsp::decimate::TranslateByFSOver4AndDecimateBy2CIC3 translate;
+	//dsp::decimate::DecimateBy2CIC3 cic_0;
+	dsp::decimate::DecimateBy2CIC3 cic_1;
+	dsp::decimate::DecimateBy2CIC3 cic_2;
+	dsp::decimate::DecimateBy2CIC3 cic_3;
+	dsp::decimate::DecimateBy2CIC3 cic_4;
+
+	DecimationFactor decimation_factor { DecimationFactor::By32 };
+
+	buffer_c16_t execute_decimation(buffer_c8_t buffer);
+};
+
+#endif/*__CHANNEL_DECIMATOR_H__*/