Mercurial > dsp > rdsp
view src/lib/signal/mixer.rs @ 24:daa09aecdc40 default tip
lib: rename phase_shift to sample_shift
Instead of tracking the phase shift in signals, we should track the sample
shift (i.e., delay) of the signal. The sample shift is a constant
regardless of the frequency - unlike phase shift. This simplifies the
tracking considerably.
author | Josef 'Jeff' Sipek <jeffpc@josefsipek.net> |
---|---|
date | Thu, 15 Apr 2021 22:26:06 -0400 |
parents | 2d5ae243921c |
children |
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/* * Copyright (c) 2020-2021 Josef 'Jeff' Sipek <jeffpc@josefsipek.net> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ use std::ops::Mul; use crate::{IQSample, Scalar}; use super::Signal; use super::Gain; pub struct Mixer<T: Signal, U: Signal> { rate: u64, /* TODO: freq */ lhs: T, rhs: U, } impl<T: Signal, U: Signal> Mixer<T, U> { pub fn new(lhs: T, rhs: U) -> Mixer<T, U> { if lhs.sample_rate() != rhs.sample_rate() { panic!("sample rate mismatch: {} {}", lhs.sample_rate(), rhs.sample_rate()); } Mixer { rate: lhs.sample_rate(), lhs: lhs, rhs: rhs, } } } impl<T: Signal, U: Signal> Signal for Mixer<T, U> { fn sample_rate(&self) -> u64 { self.rate } fn sample_size(&self) -> usize { std::mem::size_of::<IQSample>() } fn sample_shift(&self) -> u64 { panic!("TODO"); } fn freq(&self) -> u64 { panic!("TODO"); } } impl<T: Signal, U: Signal> Iterator for Mixer<T, U> { type Item = IQSample; fn next(&mut self) -> Option<Self::Item> { Some(self.lhs.next()? * self.rhs.next()?) } } include!("math.rs"); signal_math!(Mixer<Signal, Signal>);