Analog tv app (#334)

* Analog TV app (PAL)

* Icon on main menu

* Analog TV should be yellow

Works for PAL only know, it would be nice to add NTSC in the future, or some customizable sync

firmware/baseband/tv_collector.hpp

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2020 Shao
+ *
+ * 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 __TV_COLLECTOR_H__
+#define __TV_COLLECTOR_H__
+
+#include "dsp_types.hpp"
+#include "complex.hpp"
+
+#include "block_decimator.hpp"
+
+#include <cstdint>
+#include <array>
+
+#include "message.hpp"
+
+class TvCollector {
+public:
+	void on_message(const Message* const message);
+
+	void set_decimation_factor(const size_t decimation_factor);
+
+	void feed(
+		const buffer_c16_t& channel
+	);
+
+private:
+	BlockDecimator<complex16_t, 256> channel_spectrum_decimator { 1 };
+	ChannelSpectrum fifo_data[1 << ChannelSpectrumConfigMessage::fifo_k] { };
+	ChannelSpectrumFIFO fifo { fifo_data, ChannelSpectrumConfigMessage::fifo_k };
+
+	volatile bool channel_spectrum_request_update { false };
+	bool streaming { false };
+	std::array<std::complex<float>, 256> channel_spectrum { };
+	uint32_t channel_spectrum_sampling_rate { 0 };
+
+	void post_message(const buffer_c16_t& data);
+
+	void set_state(const SpectrumStreamingConfigMessage& message);
+	void start();
+	void stop();
+
+	void update();
+
+};
+
+#endif/*__TV_COLLECTOR_H__*/