/// <summary>
/// Returns a new wave with the given sample data appended.
/// </summary>
/// <param name="wav">An existing wave object.</param>
/// <param name="samples">Existing sample data.</param>
public static Wav operator +(Wav wav, List <float> samples)
{
Wav result = new Wav(wav);
result.Add(samples);
return(result);
}
/// <summary>
/// Returns a new wave with the sample data from the second appended.
/// </summary>
/// <param name="wav1">An existing wave object.</param>
/// <param name="wav2">An existing wave object.</param>
public static Wav operator +(Wav wav1, Wav wav2)
{
Wav result = new Wav(wav1);
result.Add(wav2);
return(result);
}
/// <summary>
/// Returns a new wave object with only a range of the data in it.
/// </summary>
/// <param name="index">The index where the samples begin.</param>
/// <param name="count">The amount of samples to get.</param>
public Wav GetRange(int index, int count)
{
Wav newWav = new Wav(
_leftChannel.GetRange(index, count),
_rightChannel.GetRange(index, count));
return(newWav);
}
/// <summary>
/// Constructs a wave object from the byte data.
/// </summary>
/// <param name="samples">The raw byte data.</param>
/// <param name="channels">May be 1 (mono) or 2 (stereo).</param>
/// <param name="bitDepth">May be 8, 16, 24, or 32-bit.</param>
/// <param name="sampRate">
/// Samples per second; usually factors or multiples of 44100.
/// </param>
private static Wav Construct(List <byte> samples,
int channels,
int bitDepth,
int sampRate)
{
Wav wav = new Wav();
//Checks argument validity.
if (channels < 1 || channels > 2)
{
throw new ArgumentException("Only mono and stereo channels " +
"are supported.");
}
if (bitDepth != 8 && bitDepth != 16 &&
bitDepth != 24 && bitDepth != 32)
{
throw new ArgumentException("Only 8, 16, 24, and 32-bit " +
"audio is supported.");
}
if (sampRate < 0)
{
throw new ArgumentException("The sample rate must be " +
"positive.");
}
//Holds sampleNum throughout construction.
List <float> sampleData = new List <float>();
//If the sample alignment is off, this fixes it.
while (samples.Count % (bitDepth / 8) != 0)
{
samples.Add(0);
}
//Converts the raw data into sampleNum in groups based on bit depth.
if (bitDepth == 8)
{
for (int i = 0; i < samples.Count; i++)
{
sampleData.Add((float)samples[i]);
}
}
else if (bitDepth == 16)
{
for (int i = 0; i < samples.Count; i += 2)
{
sampleData.Add((float)BitConverter.ToInt16
(samples.GetRange(i, 2).ToArray(), 0));
}
}
else if (bitDepth == 24)
{
for (int i = 0; i < samples.Count; i += 3)
{
List <byte> byteArray = samples.GetRange(i, 3);
byteArray.Add(0); //Promotes to 4 bytes for ease.
sampleData.Add((float)BitConverter.ToSingle
(samples.GetRange(i, 2).ToArray(), 0));
}
}
else //bit depth of 32.
{
for (int i = 0; i < samples.Count; i += 4)
{
sampleData.Add(BitConverter.ToSingle
(samples.GetRange(i, 4).ToArray(), 0));
}
}
//De-interleaves the data into the wave.
if (channels == 1)
{
for (int i = 0; i < sampleData.Count; i++)
{
if (channels == 1)
{
wav._leftChannel.Add(sampleData[i]);
wav._rightChannel.Add(sampleData[i]);
}
else
{
//If the sample sampleNum is even, adds it to the left.
//If the sample sampleNum is odd, adds it to the right.
if (i % 2 == 0)
{
wav._leftChannel.Add(sampleData.Last());
}
else
{
wav._rightChannel.Add(sampleData.Last());
}
}
}
}
return(wav);
}
/// <summary>
/// Creates a wav object from the samples of a wav.
/// </summary>
/// <param name="wav">An existing wav object.</param>
public Wav(Wav wav) : this()
{
_leftChannel.AddRange(wav._leftChannel);
_rightChannel.AddRange(wav._rightChannel);
}
/// <summary>
/// Copies samples from the wave object to the given index.
/// </summary>
/// <param name="wav">An existing wave object.</param>
/// <param name="index">The position to insert after.</param>
public void Insert(Wav wav, int index)
{
_leftChannel.InsertRange(index, wav._leftChannel);
_rightChannel.InsertRange(index, wav._rightChannel);
}
/// <summary>
/// Copies samples from a wave object to both channels.
/// </summary>
/// <param name="wav">An existing wave object.</param>
public void Add(Wav wav)
{
_leftChannel.AddRange(wav._leftChannel);
_rightChannel.AddRange(wav._rightChannel);
}
