Augmented Code is concentrating on writing beautiful applications and games on iOS and macOS with performance and elegance in mind.
Signal Path is a beautiful and swift spectrum viewing app. It makes easy to look through hours worth of data finding interesting signal peaks in long recordings (computing spectrums is backed by SIMD and GPU (Metal)). In addition Signal Path allows recording audio data through microphone and supports FIFO channels for importing complex signal data from any source.
Control how spectrums are represented
Use FFT settings popover to change FFT lengths, window functions, data types, sample rates, center frequencies and frequency offsets.
Fast Fourier Transform lengths from 256 to 8192.
Record audio data
In addition to viewing recorded spectrums Signal Path supports recording audio data from a connected microphone.
Have fun discovering what is going on around you.
Compress and decompress data
Scale data by merging multiple spectrums into one or duplicate spectrums onto several lines enabling fine-grained look on the data.
Note: When merging multiple spectrums into one maximum spectrum points from the set are presented.
Automatic data type selection
Using a file name format _.iq Signal Path is able to automatically choose IQ data type when first time opening a file.
Supported data format descriptions in file names:
- i8, int8
- u8, uint8
- i16, int16
- u16, uint16
- i32, int32
- u32, uint32
Note: IQ data type selection is persistent and needs to be done only once.
FIFO channels for importing data
Signal Path supports FIFO channels for importing data from any source.
Create FIFO recording by using File->New FIFO Recording menu item.
File path to the channel can be conveniently copied using Edit->Copy FIFO Path menu item.
Easiest way of testing it out is by using Terminal command:
echo "$(cat /path/to/existing/file/containing/data)" > /path/to/fifo/channel
cat /path/to/existing/file/containing/data > /path/to/fifo/channel
Give it a try
Try out Signal Path with this example file.
Subscribe to RSS feed.
Apple’s Vision framework contains computer vision related functionality and with iOS 13 it can detect text on images as well. Moreover, Apple added a new framework VisionKit what makes it easy to integrate document scanning functionality. For demonstrating the usage of it, let’s build a simple UI what can present the scanner and display scanned …
Let’s build a conversation view which shows a list of messages and has input text field with send button. Sent and received messages are managed by Conversation object. Conversation object manages a Session object which is simulating networking stack. This kind of setup allows us to look into how to propagate received messages from Session …
So far we have been using CommonCrypto when it has come to creating hashes of data. I even wrote about it some time ago and presented a thin layer on top of it making it more convenient to use. In WWDC’19 Apple presented a new framework called CryptoKit. And of course, it contains functions for …