Mercurial > dsp > rdsp
view src/lib/signal/filesource.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 std::io::BufRead; use std::marker::PhantomData; use crate::{IQSample, Scalar}; use crate::fmt::SignalFormatter; use super::Signal; use super::{Gain, Mixer}; pub struct FileSourceSignal<T: BufRead, U: SignalFormatter> { file: T, rate: u64, freq: u64, buf: Vec<u8>, phantom: PhantomData<U> } impl<T: BufRead, U: SignalFormatter> FileSourceSignal<T, U> { pub fn new(file: T, rate: u64, freq: u64) -> FileSourceSignal<T, U> { FileSourceSignal { file: file, rate: rate, freq: freq, buf: vec![ 0u8; U::sample_size() ], phantom: PhantomData } } } impl<T: BufRead, U: SignalFormatter> Signal for FileSourceSignal<T, U> { fn sample_rate(&self) -> u64 { self.rate } fn sample_size(&self) -> usize { U::sample_size() } fn sample_shift(&self) -> u64 { 0 } fn freq(&self) -> u64 { self.freq } } impl<T: BufRead, U: SignalFormatter> Iterator for FileSourceSignal<T, U> { type Item = IQSample; fn next(&mut self) -> Option<Self::Item> { self.file.read_exact(&mut self.buf).ok().map(|_v| U::raw_to_iqsample(&self.buf)) } } include!("math.rs"); signal_math!(FileSourceSignal<BufRead, SignalFormatter>);