From 06a90001363fdcb542b531a74ed2c18f714f58c4 Mon Sep 17 00:00:00 2001
From: Arturs Artamonovs <arturs.artamonovs@protonmail.com>
Date: Fri, 17 Jan 2025 09:27:56 +0000
Subject: waterfallui: data get processed and drawn, ui controlls are dummy

---
 Waterfall_UI/SDRSpectrum.swift | 137 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 Waterfall_UI/SDRSpectrum.swift

(limited to 'Waterfall_UI/SDRSpectrum.swift')

diff --git a/Waterfall_UI/SDRSpectrum.swift b/Waterfall_UI/SDRSpectrum.swift
new file mode 100644
index 0000000..c83e802
--- /dev/null
+++ b/Waterfall_UI/SDRSpectrum.swift
@@ -0,0 +1,137 @@
+//
+//  SDRSpectrum.swift
+//  PrySDR
+//
+//  Created by Jacky Jack on 10/01/2025.
+//
+
+//
+//  FileSpectrum.swift
+//  PrySDR
+//
+//  Created by Jacky Jack on 01/01/2025.
+//
+
+import Accelerate
+import AppKit
+import Combine
+import CoreImage
+
+import libr820
+
+class SDRSpectrum: NSObject, ObservableObject {
+    
+    static let default_width = 512
+    static let default_height = 512
+    static let defaultSleepTime:UInt32 = 1
+    var offset:Int=0
+    var allData:[Int8]? = nil
+    var line_counter:Int = 0
+    
+    //SDR default configs
+    let device_idx: UInt32 = 0
+    let samplerate: Int = 2048000
+    let gain: Int = 0
+    let frequency: Int = 99500000
+    let nsamples: Int = default_width
+    var device: R820Tuner?
+    
+    //fft drawing related
+    let fft512 = NaiveFFT512()
+    
+    let sessionQueue = DispatchQueue(label: "sessionQueue",
+                                         attributes: [],
+                                         autoreleaseFrequency: .workItem)
+    
+    @Published var outputImage = emptyCGImage
+    
+    let simpleImage = SimpleImage(width: default_width, height: default_height)
+    
+    /// A 1x1 Core Graphics image.
+    static var emptyCGImage: CGImage = {
+            let buffer = vImage.PixelBuffer(
+                pixelValues: [0],
+                size: .init(width: 1, height: 1),
+                pixelFormat: vImage.Planar8.self)
+            
+            let fmt = vImage_CGImageFormat(
+                bitsPerComponent: 8,
+                bitsPerPixel: 8 ,
+                colorSpace: CGColorSpaceCreateDeviceGray(),
+                bitmapInfo: CGBitmapInfo(rawValue: CGImageAlphaInfo.none.rawValue),
+                renderingIntent: .defaultIntent)
+            
+            return buffer.makeCGImage(cgImageFormat: fmt!)!
+    }()
+    
+    func makeSpectrogramImage() -> NSImage {
+        
+        return NSImage(cgImage: SDRSpectrum.emptyCGImage, size: .zero)
+    }
+    
+    //just get data time to time from databuffer and pretend to be realtime data
+    func dataFileProcessor() {
+
+
+    }
+
+    func startRunning() {
+        let buf_ptr = UnsafeMutableRawPointer.allocate(byteCount: nsamples, alignment: 1)
+        var nbytes:Int32 = 0
+        //var total_bytes:Int32 = 0
+        
+        
+        //prepare sdr
+        print("Prepare SDR")
+        let count = getDeviceCount()
+        print("Found \(count) devices")
+        self.device = R820Tuner()
+        sleep(1)
+        if (self.device != nil) {
+            self.device!.open(index:0)
+            
+            //prepare dongle to receive some data
+            let _ = self.device!.setSampleRate(samplerate: UInt32(samplerate))
+            let _ = self.device!.setCenterFreq(freq: UInt32(frequency))
+            let _ = self.device!.setAgcMode(on: 1)
+            let _ = self.device!.resetBuffer()
+        }
+        //run the task
+        sessionQueue.async {
+            print("lets start the task for spectrum analysis")
+            for i in 0..<512 {
+                
+                if let dev = self.device {
+                    let ret = dev.readSync(buf: buf_ptr, len: Int32(self.nsamples), n_read: &nbytes)
+                    if ret<0 {
+                        print("data read sync returned <0 = \(ret)")
+                        sleep(1);
+                        continue;
+                    }
+                }
+                print("Got \(nbytes) bytes")
+                
+                /*
+                let dataU8 = buf_ptr.bindMemory(to: UInt8.self, capacity: self.nsamples)
+                let bufferU8 = UnsafeBufferPointer(start: dataU8, count: self.nsamples)
+                let convertedData = Data(bufferU8)
+                */
+                let dataI8 = buf_ptr.bindMemory(to: Int8.self, capacity: self.nsamples)
+                let bufferI8 = UnsafeBufferPointer(start: dataI8, count: self.nsamples)
+                let safeI8 = Array(bufferI8)
+                
+                let transform_result = self.fft512.computeLine(safeI8)
+                print(transform_result)
+                print("FFT result \(transform_result.count) points")
+                //let drawSlice = transform_result[0...SDRSpectrum.default_width-1]
+                //print("FFT result \(drawSlice.count) points")
+                self.simpleImage.drawPalletLine(line: i, pixelLine: transform_result)
+                self.outputImage = self.simpleImage.toCGImage()!
+                
+                print("Process the task line \(i)")
+                sleep(1)
+            }
+            print("SDR loop done run")
+        }
+    }
+}
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