indi_rtlsdr.h

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/*
    indi_rtlsdr - a software defined radio driver for INDI
    Copyright (C) 2017  Ilia Platone - Jasem Mutlaq
    Collaborators:
        - Ilia Platone <[email protected]>
        - Jasem Mutlaq - INDI library - <http://indilib.org>
        - Monroe Pattillo - Fox Observatory - South Florida Amateur Astronomers Association <http://www.sfaaa.com/>
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This library 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
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
 
#pragma once
 
#include <rtl-sdr.h>
#include "indireceiver.h"
#include "stream/streammanager.h"
 
enum Settings
{
    FREQUENCY_N = 0,
    SAMPLERATE_N,
    BANDWIDTH_N,
    NUM_SETTINGS
};
class RTLSDR : public INDI::Receiver
{
    public:
        RTLSDR(int32_t index);
 
        void grabData();
        rtlsdr_dev *rtl_dev = { nullptr };
        int to_read;
        // Are we integrating?
        bool InIntegration;
        uint8_t *buffer;
        int b_read, n_read;
        bool ISNewNumber(const char *dev, const char *name, double values[], char *names[], int n) override;
 
    protected:
        // General device functions
        bool Connect() override;
        bool Disconnect() override;
        const char *getDefaultName() override;
        bool initProperties() override;
        bool updateProperties() override;
 
        // Receiver specific functions
        bool StartIntegration(double duration) override;
        void setupParams(float sr, float freq, float gain);
        bool AbortIntegration() override;
        void TimerHit() override;
 
        bool StartStreaming() override;
        bool StopStreaming() override;
        void * streamCapture();
 
        bool Handshake() override;
 
    private:
        void Callback();
 
        // Utility functions
        float CalcTimeLeft();
 
        // Struct to keep timing
        struct timeval IntStart;
        float IntegrationRequest;
        uint8_t *real;
        uint8_t *imaginary;
 
        int32_t receiverIndex = { 0 };
 
        int streamPredicate;
        pthread_t primary_thread;
        bool terminateThread;
 
        bool sendTcpCommand(int cmd, int value);
        enum TcpCommands
        {
            CMD_SET_FREQ = 0x1,
            CMD_SET_SAMPLE_RATE = 0x2,
            CMD_SET_TUNER_GAIN_MODE = 0x3,
            CMD_SET_GAIN = 0x4,
            CMD_SET_FREQ_COR = 0x5,
            CMD_SET_AGC_MODE = 0x8,
            CMD_SET_TUNER_GAIN_INDEX = 0xd
        };
};