wcomm 0.1.3

API for wireless communications
Documentation 
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use crate::channels::Channel;
use crate::modulation::DigitalModulator;
use crate::utils::math;
use crate::Message;

/**

 * M-ary Frequency Shift Keying modulation.
 */
pub struct MFSK {
    _size: u32,
    _base_frequency: u32,
    _delta_frequency: u32,
    _sampling_frequency: u32,
}

impl DigitalModulator for MFSK {
    fn get_name(&self) -> String {
        return format!("{}FSK", self._size);
    }

    fn get_sampling_frequency(&self) -> u32 {
        return self._sampling_frequency;
    }

    fn get_size(&self) -> u32 {
        return self._size;
    }

    fn send_msg(&self, channel: &dyn Channel, msg: &Message, time: u32) {
        for key in self.split(msg) {
            channel.play(self.calculate_frequency(key), time);
        }
    }

    fn get_raw_data(&self, msg: &Message, time: u32) -> Vec<f32> {
        let mut data = Vec::<f32>::new();
        let split_msg = self.split(msg);
        let samples_per_char = time * self.get_sampling_frequency() / 1000;

        for t in 0..(split_msg.len() as u32 * samples_per_char) {
            let key = split_msg[(t / samples_per_char) as usize];
            data.push(
                (2_f32 * math::PI * ((self.calculate_frequency(key) * t) as f32)
                    / self.get_sampling_frequency() as f32)
                    .cos(),
            );
        }
        return data;
    }
}

impl MFSK {
    /**

     * Create an instance of `MFSK` with the given size.
     */
    pub fn new(size: u32) -> MFSK {
        return MFSK {
            _size: size,
            _base_frequency: 300,
            _delta_frequency: 100,
            _sampling_frequency: 44_100,
        };
    }

    /**

     * Set the size of the modulator.
     */
    pub fn size(mut self, new_size: u32) -> MFSK {
        self._size = new_size;
        return self;
    }

    /**

     * Set the base frequency of the modulator.
     */
    pub fn base_frequency(mut self, new_base_freq: u32) -> MFSK {
        self._base_frequency = new_base_freq;
        return self;
    }

    /**

     * Set the difference in frequency between each packet of bits.
     */
    pub fn delta_frequency(mut self, new_delta_freq: u32) -> MFSK {
        self._delta_frequency = new_delta_freq;
        return self;
    }

    /**

     * Set the sampling frequency of the modulator.
     */
    pub fn sampling_frequency(mut self, new_samp_freq: u32) -> MFSK {
        self._sampling_frequency = new_samp_freq;
        return self;
    }

    /**

     * Calculate the frequency asociated to a given key.
     */
    fn calculate_frequency(&self, key: u32) -> u32 {
        return self._base_frequency + key * self._delta_frequency;
    }
}