Redefine subchannel data for later (nw)

2025-12-16 19:24:41 +00:00 · 2021-10-29 22:20:37 -07:00
parent bcea992857
commit a189001d96
3 changed files with 176 additions and 74 deletions
--- a/RedBookPlayer.Models/Hardware/SubchannelData.cs
+++ b/RedBookPlayer.Models/Hardware/SubchannelData.cs
@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+
+namespace RedBookPlayer.Models.Hardware
+{
+    /// <summary>
+    /// Represents subchannel data for a single sector
+    /// </summary>
+    /// <see cref="https://jbum.com/cdg_revealed.html"/>
+    internal class SubchannelData
+    {
+        public SubchannelPacket[] Packets { get; private set; } = new SubchannelPacket[4];
+
+        /// <summary>
+        /// Create a new subchannel data from a byte array
+        /// </summary>
+        public SubchannelData(byte[] bytes)
+        {
+            if(bytes == null || bytes.Length != 96)
+                return;
+
+            byte[] buffer = new byte[24];
+            for(int i = 0; i < 4; i++)
+            {
+                Array.Copy(bytes, 24 * i, buffer, 0, 24);
+                Packets[i] = new SubchannelPacket(buffer);
+            }
+        }
+
+        /// <summary>
+        /// Convert the packet data into separate named subchannels
+        /// </summary>
+        public Dictionary<char, byte[]> ConvertData()
+        {
+            if(this.Packets == null || this.Packets.Length != 4)
+                return null;
+
+            // Prepare the output formatted data
+            Dictionary<char, byte[]> formattedData = new Dictionary<char, byte[]>
+            {
+                ['P'] = new byte[8],
+                ['Q'] = new byte[8],
+                ['R'] = new byte[8],
+                ['S'] = new byte[8],
+                ['T'] = new byte[8],
+                ['U'] = new byte[8],
+                ['V'] = new byte[8],
+                ['W'] = new byte[8],
+            };
+
+            // Loop through all subchannel packets
+            for(int i = 0; i < 4; i++)
+            {
+                Dictionary<char, byte[]> singleData = Packets[i].ConvertData();
+
+                Array.Copy(singleData['P'], 0, formattedData['P'], 2 * i, 2);
+                Array.Copy(singleData['Q'], 0, formattedData['Q'], 2 * i, 2);
+                Array.Copy(singleData['R'], 0, formattedData['R'], 2 * i, 2);
+                Array.Copy(singleData['S'], 0, formattedData['S'], 2 * i, 2);
+                Array.Copy(singleData['T'], 0, formattedData['T'], 2 * i, 2);
+                Array.Copy(singleData['U'], 0, formattedData['U'], 2 * i, 2);
+                Array.Copy(singleData['V'], 0, formattedData['V'], 2 * i, 2);
+                Array.Copy(singleData['W'], 0, formattedData['W'], 2 * i, 2);
+            }
+
+            return formattedData;
+        }
+    }
+}