Rebased code from new eried repo commits. Changed to to reflect strijar implementation. Fixed previous issue with old ssb-am-tx ui_mictx code.

firmware/baseband/dsp_modulate.hpp

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2020 Belousov Oleg
+ *
+ * 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 __DSP_MODULATE_H__
+#define __DSP_MODULATE_H__
+
+#include "dsp_types.hpp"
+#include "dsp_hilbert.hpp"
+
+namespace dsp {
+namespace modulate {
+
+enum class Mode {
+	None,
+	AM,
+	DSB,
+	LSB,
+	USB,
+	FM
+};
+
+///
+
+class Modulator {
+public:
+	virtual void execute(const buffer_s16_t& audio, const buffer_c8_t& buffer) = 0;
+	virtual ~Modulator();
+
+	Mode get_mode();
+	void set_mode(Mode new_mode);
+
+    void set_over(uint32_t new_over);
+
+protected:
+    uint32_t    over = 1;
+	Mode	    mode = Mode::None;
+};
+
+///
+
+class SSB : public Modulator {
+public:
+	SSB();
+
+	virtual void execute(const buffer_s16_t& audio, const buffer_c8_t& buffer);
+
+private:
+	dsp::HilbertTransform	hilbert;
+};
+
+///
+
+class FM : public Modulator {
+public:
+	FM();
+
+	virtual void execute(const buffer_s16_t& audio, const buffer_c8_t& buffer);
+	void set_fm_delta(uint32_t new_delta);
+
+///
+
+private:
+	uint32_t	fm_delta { 0 };
+	uint32_t	phase { 0 }, sphase { 0 };
+	int32_t		sample { 0 }, delta { };
+};
+
+class AM : public Modulator {
+public:
+        AM();
+
+        virtual void execute(const buffer_s16_t& audio, const buffer_c8_t& buffer);
+};
+
+} /* namespace modulate */
+} /* namespace dsp */
+
+#endif/*__DSP_MODULATE_H__*/