/// <summary>
/// Read wav file given the wav file
/// </summary>
/// <param name="audioFile">Wav file</param>
/// <returns>true if success</returns>
public static bool readWav(AudioFile audioFile)
{
audioFile.L1 = audioFile.R1 = null;
//float [] left = new float[1];
//float [] right;
try
{
using (FileStream fs = File.Open(audioFile.FilePath, FileMode.Open))
{
BinaryReader reader = new BinaryReader(fs);
// chunk 0
audioFile.ChunkID = reader.ReadInt32();
audioFile.FileSize = reader.ReadInt32();
audioFile.RiffType = reader.ReadInt32();
// chunk 1
audioFile.FmtID = reader.ReadInt32();
audioFile.FmtSize = reader.ReadInt32(); // bytes for this chunk
audioFile.FmtCode = reader.ReadInt16();
audioFile.Channels = reader.ReadInt16();
audioFile.SampleRate = reader.ReadInt32();
audioFile.ByteRate = reader.ReadInt32();
audioFile.FmtBlockAlign = reader.ReadInt16();
audioFile.BitDepth = reader.ReadInt16();
if (audioFile.FmtSize == 18)
{
// Read any extra values
audioFile.FmtExtraSize = reader.ReadInt16();
reader.ReadBytes(audioFile.FmtExtraSize);
}
// chunk 2
audioFile.DataID = reader.ReadInt32();
while (audioFile.DataID != 0x61746164)
{
int temp = 0;
while (temp != 0x6164)
{
temp = reader.ReadInt16();
}
int temp2 = reader.ReadInt16();
temp2 = temp2 << 16;
audioFile.DataID = temp2 + temp;
}
audioFile.Bytes = reader.ReadInt32();
// DATA!
audioFile.ByteArray = reader.ReadBytes(audioFile.Bytes);
audioFile.BytesForSamp = audioFile.BitDepth / 8;
audioFile.Samps = audioFile.Bytes / audioFile.BytesForSamp;
float[] asFloat = null;
switch (audioFile.BitDepth)
{
case 64:
double[] asDouble = new double[audioFile.Samps];
Buffer.BlockCopy(audioFile.ByteArray, 0, asDouble, 0, audioFile.Bytes);
asFloat = Array.ConvertAll(asDouble, e => (float)e);
break;
case 32:
asFloat = new float[audioFile.Samps];
Buffer.BlockCopy(audioFile.ByteArray, 0, asFloat, 0, audioFile.Bytes);
break;
case 16:
Int16[] asInt16 = new Int16[audioFile.Samps];
Buffer.BlockCopy(audioFile.ByteArray, 0, asInt16, 0, audioFile.Bytes);
asFloat = Array.ConvertAll(asInt16, e => (float)e /*/ (float)Int16.MaxValue*/);
break;
case 8:
byte[] asByte = new byte[audioFile.Samps];
Buffer.BlockCopy(audioFile.ByteArray, 0, asByte, 0, audioFile.Bytes);
double[] asDoubleFromByte = ArrayTransform.byteRecordToDouble(asByte);
asFloat = Array.ConvertAll(asDoubleFromByte, e => (float)e /* / (float)Int16.MaxValue*/);
break;
default:
return(false);
}
switch (audioFile.Channels)
{
case 1:
audioFile.L1 = asFloat;
audioFile.R1 = null;
reader.Close();
fs.Close();
return(true);
case 2:
audioFile.L1 = new float[audioFile.Samps / 2];
audioFile.R1 = new float[audioFile.Samps / 2];
for (int i = 0, s = 0; i < audioFile.Samps / 2; i++)
{
audioFile.L1[i] = asFloat[s++];
audioFile.R1[i] = asFloat[s++];
}
reader.Close();
fs.Close();
return(true);
default:
reader.Close();
fs.Close();
return(false);
}
}
}
catch
{
Debug.WriteLine("...Failed to load note: " + audioFile.FileName);
return(false);
//left = new float[ 1 ]{ 0f };
}
}
public static bool writeWav(AudioFile audioFile, Stream f)
{
BinaryWriter wr = new BinaryWriter(f);
wr.Write(audioFile.ChunkID);
wr.Write(audioFile.FileSize);
wr.Write(audioFile.RiffType);
wr.Write(audioFile.FmtID);
wr.Write(audioFile.FmtSize);
wr.Write((Int16)audioFile.FmtCode);
wr.Write((Int16)audioFile.Channels);
wr.Write(audioFile.SampleRate);
wr.Write(audioFile.ByteRate);
wr.Write((Int16)audioFile.FmtBlockAlign);
wr.Write((Int16)audioFile.BitDepth);
wr.Write(audioFile.DataID);
wr.Write(audioFile.Bytes);
if (audioFile.Channels == 2)
{
switch (audioFile.BitDepth)
{
case 64:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write((double)audioFile.L1[i]);
wr.Write((double)audioFile.R1[i]);
}
break;
case 32:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write(audioFile.L1[i]);
wr.Write(audioFile.R1[i]);
}
break;
case 16:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write((Int16)(audioFile.L1[i] /* * (float)Int16.MaxValue*/));
wr.Write((Int16)(audioFile.R1[i] /* * (float)Int16.MaxValue*/));
}
break;
case 8:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write((byte)(audioFile.L1[i]));
wr.Write((byte)(audioFile.R1[i]));
}
break;
default:
break;
}
}
else
{
switch (audioFile.BitDepth)
{
case 64:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write((double)audioFile.L1[i]);
}
break;
case 32:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write(audioFile.L1[i]);
}
break;
case 16:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write((Int16)audioFile.L1[i] /* * (float)Int16.MaxValue*/);
}
break;
case 8:
for (int i = 0; i < audioFile.L1.Length; i++)
{
wr.Write((byte)audioFile.L1[i]);
}
break;
default:
break;
}
}
wr.Close();
f.Close();
return(false);
}
