public void PlayAudio(short[] buffer)
{
int error = 0;
int result = PulseAudioNativeMethods.pa_simple_write(_paSimple, buffer, buffer.Length * 2, ref error);
if (error != 0 || result != 0)
{
throw new Exception($"Failed to write audio to PulseAudio Error: {error} Result: {result} ");
}
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
if (_paSimple != IntPtr.Zero)
{
PulseAudioNativeMethods.pa_simple_free(_paSimple);
_paSimple = IntPtr.Zero;
}
}
}
public void ReadAudio(short[] buffer)
{
int error = 0;
int result = PulseAudioNativeMethods.pa_simple_read(_paSimple, buffer, buffer.Length * 2, ref error);
if (error != 0 || result != 0)
{
IntPtr msgPtr = PulseAudioNativeMethods.pa_strerror(error);
string?errorMessage = Marshal.PtrToStringAuto(msgPtr);
throw new Exception($"Failed to read audio from PulseAudio Error: {errorMessage} Result: {result} ");
}
}
public PulseAudioSimple(StreamDirection streamDirection, string streamName)
{
SampleSpec sampleSpec;
sampleSpec.channels = 1;
sampleSpec.format = SampleFormat.PA_SAMPLE_S16LE;
sampleSpec.rate = 8000;
IntPtr sampleSpecPtr = Marshal.AllocHGlobal(Marshal.SizeOf(sampleSpec));
Marshal.StructureToPtr(sampleSpec, sampleSpecPtr, true);
BufferAttributes bufferAttributes = new BufferAttributes();
if (streamDirection == StreamDirection.Playback)
{
bufferAttributes.maxlength = uint.MaxValue;
bufferAttributes.tlength = 160 * 2;
bufferAttributes.prebuf = uint.MaxValue;
bufferAttributes.minreq = uint.MaxValue;
bufferAttributes.fragsize = uint.MaxValue;
}
if (streamDirection == StreamDirection.Record)
{
bufferAttributes.maxlength = 160 * 12;
bufferAttributes.tlength = 160 * 2;
bufferAttributes.prebuf = 160 * 12;
bufferAttributes.minreq = 160 * 2;
bufferAttributes.fragsize = 160 * 2;
}
IntPtr bufferAttributesPtr = Marshal.AllocHGlobal(Marshal.SizeOf(bufferAttributes));
Marshal.StructureToPtr(bufferAttributes, bufferAttributesPtr, true);
int error = 0;
_paSimple = PulseAudioNativeMethods.pa_simple_new(null, "Ropu", streamDirection, null, streamName, sampleSpecPtr, IntPtr.Zero, bufferAttributesPtr, ref error);
if (error != 0)
{
throw new Exception($"Failed to initalize pulse audio with error {error}");
}
}
