public static byte[] GetWav(AudioClipData clipData, out uint length, WavModificationOptions options)
{
var data = ConvertAndWrite(clipData.samples, out length, out var samples, options);
WriteHeader(data, clipData.frequency, clipData.channels, length, samples);
return(data);
}
public static void Save(string filename, AudioClip clip, WavModificationOptions optionsParam = null)
{
AudioClipData data = new AudioClipData();
data.samples = new float[clip.samples * clip.channels];
clip.GetData(data.samples, 0);
data.frequency = (uint)clip.frequency;
data.channels = (ushort)clip.channels;
Save(filename, data, optionsParam);
}
public static void Save(string filename, AudioClipData clipData, WavModificationOptions optionsParam = null)
{
WavModificationOptions options = optionsParam != null ? optionsParam : new WavModificationOptions();
if (!filename.ToLower().EndsWith(".wav"))
{
filename += ".wav";
}
var filepath = Path.Combine(Application.persistentDataPath, filename);
// Make sure directory exists if user is saving to sub dir.
Directory.CreateDirectory(Path.GetDirectoryName(filepath));
using (var fileStream = new FileStream(filepath, FileMode.Create))
using (var writer = new BinaryWriter(fileStream))
{
var wav = GetWav(clipData, out var length, options);
writer.Write(wav, 0, (int)length);
}
}
private static byte[] ConvertAndWrite(float[] samples, out uint length, out uint samplesAfterTrimming, WavModificationOptions options)
{
var sampleCount = samples.Length;
var start = 0;
var end = sampleCount - 1;
if (options.trimSamples > 0)
{
start = (int)options.trimSamples;
}
if (options.silenceSamples > 0)
{
sampleCount += (int)options.silenceSamples;
}
var buffer = new byte[(sampleCount * 2) + HeaderSize];
var p = HeaderSize;
//Write out silence samples
if (options.silenceSamples > 0)
{
for (uint i = 0; i < options.silenceSamples; ++i)
{
buffer[p++] = 0;
buffer[p++] = 0;
}
}
for (var i = start; i <= end; i++)
{
var value = (short)(samples[i] * RescaleFactor);
buffer[p++] = (byte)(value >> 0);
buffer[p++] = (byte)(value >> 8);
}
length = p;
samplesAfterTrimming = (uint)(end - start + 1) + options.silenceSamples;
return(buffer);
}
