58 lines
2.1 KiB
C#
58 lines
2.1 KiB
C#
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using System;
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using System.IO;
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namespace Ryuclaw.Audio.Shared
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{
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public class WaveReader
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{
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private WaveHeader _header;
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public byte[] AudioData { get; private set; }
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public WaveReader()
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{
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_header = new WaveHeader();
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AudioData = new byte[0];
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}
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public void Load(string filePath)
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{
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using (var stream = new FileStream(filePath, FileMode.Open))
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using (var reader = new BinaryReader(stream))
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{
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// RIFF header
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string chunkID = new string(reader.ReadChars(4));
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if (chunkID != "RIFF") throw new Exception("Not a valid WAV file.");
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var ChunkSize = reader.ReadInt32(); // Chunk size
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string format = new string(reader.ReadChars(4));
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if (format != "WAVE") throw new Exception("Not a valid WAV file.");
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// fmt sub-chunk
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string subchunk1ID = new string(reader.ReadChars(4));
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if (subchunk1ID != "fmt ") throw new Exception("Expected fmt chunk.");
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int subChunk1Size = reader.ReadInt32();
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short audioFormat = reader.ReadInt16();
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var NumChannels = reader.ReadInt16();
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var SampleRate = reader.ReadInt32();
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var ByteRate = reader.ReadInt32(); // Byte rate
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var BlockAlign = reader.ReadInt16(); // Block align
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var BitsPerSample = reader.ReadInt16();
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_header = new WaveHeader(SampleRate, ChunkSize, ByteRate, BitsPerSample, NumChannels, BlockAlign);
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if (audioFormat != 1 || subChunk1Size != 16)
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{
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throw new Exception("Only PCM format WAV files are supported.");
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}
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// data sub-chunk
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string subchunk2ID = new string(reader.ReadChars(4));
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if (subchunk2ID != "data") throw new Exception("Expected data chunk.");
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int subChunk2Size = reader.ReadInt32();
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AudioData = reader.ReadBytes(subChunk2Size);
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}
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}
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}
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}
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