/// <summary>
/// Opens the audio track with the specified parameters
/// </summary>
/// <param name="sampleRate">The requested sample rate of the track</param>
/// <param name="channelCount">The requested channel count of the track</param>
/// <param name="callback">A <see cref="ReleaseCallback" /> that represents the delegate to invoke when a buffer has been released by the audio track</param>
/// <param name="format">The requested sample format of the track</param>
public void Open(
int sampleRate,
int channelCount,
ReleaseCallback callback,
SoundIOFormat format = SoundIOFormat.S16LE)
{
// Close any existing audio streams
if (AudioStream != null)
{
Close();
}
if (!AudioDevice.SupportsSampleRate(sampleRate))
{
throw new InvalidOperationException($"This sound device does not support a sample rate of {sampleRate}Hz");
}
if (!AudioDevice.SupportsFormat(format))
{
throw new InvalidOperationException($"This sound device does not support SoundIOFormat.{Enum.GetName(typeof(SoundIOFormat), format)}");
}
AudioStream = AudioDevice.CreateOutStream();
AudioStream.Name = $"SwitchAudioTrack_{TrackID}";
AudioStream.Layout = SoundIOChannelLayout.GetDefault(channelCount);
AudioStream.Format = format;
AudioStream.SampleRate = sampleRate;
AudioStream.WriteCallback = WriteCallback;
BufferReleased += callback;
AudioStream.Open();
}
public static AudioFormat ToManagedFormat(SoundIOFormat format, int sampleRate, int channels)
{
if (format == SoundIODevice.S16NE)
{
return(new AudioFormat(sampleRate, channels, 16, true));
}
else if (format == SoundIODevice.U16NE)
{
return(new AudioFormat(sampleRate, channels, 16, false));
}
else if (format == SoundIODevice.S24NE)
{
return(new AudioFormat(sampleRate, channels, 24, true));
}
else if (format == SoundIODevice.U24NE)
{
return(new AudioFormat(sampleRate, channels, 24, false));
}
else if (format == SoundIODevice.Float32NE)
{
return(new AudioFormat(sampleRate, channels, 32, true));
}
else
{
return(null);
}
}
public bool SupportsFormat(SoundIOFormat format)
{
return(Natives.soundio_device_supports_format(handle, (SoundIoFormat)format));
}
public static string GetSoundFormatName(SoundIOFormat format)
{
return(Marshal.PtrToStringAnsi(Natives.soundio_format_name((SoundIoFormat)format)));
}
public static int GetBytesPerSecond(SoundIOFormat format, int channelCount, int sampleRate)
{
return(Natives.soundio_get_bytes_per_second((SoundIoFormat)format, channelCount, sampleRate));
}
public static int GetBytesPerFrame(SoundIOFormat format, int channelCount)
{
return(Natives.soundio_get_bytes_per_frame((SoundIoFormat)format, channelCount));
}
public static int GetBytesPerSample(SoundIOFormat format)
{
return(Natives.soundio_get_bytes_per_sample((SoundIoFormat)format));
}