CUETools.Codecs.LossyWAV: split classes into separate files.

2025-12-16 18:14:25 +00:00 · 2011-10-24 15:12:26 +00:00
parent 426f733d19
commit 524befe7b9
8 changed files with 1021 additions and 1001 deletions
--- a/CUETools.Codecs.LossyWAV/LossyWAVReader.cs
+++ b/CUETools.Codecs.LossyWAV/LossyWAVReader.cs
@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace CUETools.Codecs.LossyWAV
+{
+    public class LossyWAVReader : IAudioSource
+    {
+        private IAudioSource _audioSource, _lwcdfSource;
+        private AudioBuffer lwcdfBuffer;
+        private double scaling_factor;
+
+        public long Length
+        {
+            get
+            {
+                return _audioSource.Length;
+            }
+        }
+
+        public long Position
+        {
+            get
+            {
+                return _audioSource.Position;
+            }
+            set
+            {
+                _audioSource.Position = value;
+                _lwcdfSource.Position = value;
+            }
+        }
+
+        public long Remaining
+        {
+            get
+            {
+                return _audioSource.Remaining;
+            }
+        }
+
+        public AudioPCMConfig PCM
+        {
+            get
+            {
+                return _audioSource.PCM;
+            }
+        }
+
+        public string Path
+        {
+            get
+            {
+                return _audioSource.Path;
+            }
+        }
+
+        public LossyWAVReader(IAudioSource audioSource, IAudioSource lwcdfSource)
+        {
+            _audioSource = audioSource;
+            _lwcdfSource = lwcdfSource;
+
+            if (_audioSource.Length != _lwcdfSource.Length)
+                throw new Exception("Data not same length");
+            if (_audioSource.PCM.BitsPerSample != _lwcdfSource.PCM.BitsPerSample
+                || _audioSource.PCM.ChannelCount != _lwcdfSource.PCM.ChannelCount
+                || _audioSource.PCM.SampleRate != _lwcdfSource.PCM.SampleRate)
+                throw new Exception("FMT Data mismatch");
+
+            scaling_factor = 1.0; // !!!! Need to read 'fact' chunks or tags here
+        }
+
+        public int Read(AudioBuffer buff, int maxLength)
+        {
+            if (lwcdfBuffer == null || lwcdfBuffer.Size < buff.Size)
+                lwcdfBuffer = new AudioBuffer(_lwcdfSource, buff.Size);
+            int sampleCount = _audioSource.Read(buff, maxLength);
+            if (sampleCount != _lwcdfSource.Read(lwcdfBuffer, maxLength))
+                throw new Exception("size mismatch"); // Very likely to happen (depending on lwcdfSource implementation)
+            for (uint i = 0; i < sampleCount; i++)
+                for (int c = 0; c < buff.PCM.ChannelCount; c++)
+                    buff.Samples[i, c] = (int)Math.Round(buff.Samples[i, c] / scaling_factor + lwcdfBuffer.Samples[i, c]);
+            return sampleCount;
+        }
+
+
+        public void Close()
+        {
+            _audioSource.Close();
+            _lwcdfSource.Close();
+        }
+    }
+}