public AudioSampleHistoryBuffer(float bufferTime)
{
size = (int)(bufferTime * WaveOutput.InternalFormat.SampleRate);
AudioEngine.Log($"AudioSampleHistoryBuffer: Create buffer for {bufferTime}s -> {size} samples");
buffer = new float[size];
}
public void Dispose()
{
AudioEngine.Log($"AudioSampleBuffer({GetHashCode()}): Disposed ");
Processor = null;
}
public AudioSampleBuffer(WaveFormat format)
{
AudioEngine.Log($"AudioSampleBuffer({GetHashCode()}): Created {format}");
WaveFormat = format;
}
public void Update(WaveOutputDevice device, AudioSampleBuffer input, out string status,
out WaveFormat waveFormat, out int latency, out float cpuUsage,
out int bufferUnderRuns, int sampleRate = 44100,
int driverLatency = 200, int internalLatency = 300, int bufferSize = 512, bool reset = false)
{
bool hasDeviceChanged = device?.Value != Device?.Value ||
sampleRate != SampleRate ||
driverLatency != DriverLatency ||
bufferSize != BufferSize ||
reset;
Device = device;
Input = input;
SampleRate = sampleRate;
InternalLatency = internalLatency;
DriverLatency = driverLatency;
BufferSize = bufferSize;
if (hasDeviceChanged)
{
processor?.Dispose();
processor = null;
if (waveOut != null)
{
AudioEngine.Log("Stopping WaveOut...");
waveOut.Stop();
waveOut.Dispose();
}
}
if (processor == null)
{
processor = new AudioThread.AudioThreadProcessor(BufferSize);
}
processor.EnsureThreadIsRunning();
processor.RequestedLatency = InternalLatency;
if (hasDeviceChanged)
{
InternalFormat = WaveFormat.CreateIeeeFloatWaveFormat(sampleRate, 2);
SingleChannelFormat = WaveFormat.CreateIeeeFloatWaveFormat(sampleRate, 1);
processor.WaveFormat = InternalFormat;
if (device != null)
{
AudioEngine.Log(
$"WaveOutput: Configuration changed, device={device.Value}, sampleRate={sampleRate}, latency={InternalLatency} {HotSwapped} ");
try
{
waveOut = ((IWaveOutputFactory)device.Tag).Create(DriverLatency);
var wave16 = new SampleToWaveProvider16(processor);
waveOut.Init(wave16);
waveOut.Play();
AudioEngine.Log("WaveOutput: Started");
OutputFormat = wave16.WaveFormat;
}
catch (Exception e)
{
AudioEngine.Log(e);
waveOut = null;
}
}
}
processor.Input = Input;
status = waveOut != null?waveOut.PlaybackState.ToString() : "Uninitialized";
waveFormat = OutputFormat;
latency = processor.Latency;
cpuUsage = processor.CpuUsage;
bufferUnderRuns = processor.BufferUnderRuns;
}
public AudioSampleBuffer Update(WaveInputDevice device, out string status,
out WaveFormat waveFormat, out int latency, out float cpuUsage, out int bufferUnderRuns,
int driverLatency = 150, int internalLatency = 8, int bufferSize = 512, bool reset = false)
{
bool hasDeviceChanged = Device?.Value != device?.Value ||
DriverLatency != driverLatency ||
BufferSize != bufferSize ||
reset;
Device = device;
DriverLatency = driverLatency;
InternalLatency = internalLatency;
BufferSize = bufferSize;
if (hasDeviceChanged)
{
processor?.Dispose();
processor = null;
if (waveIn != null)
{
AudioEngine.Log("Stopping WaveIn...");
waveIn.StopRecording();
waveIn.Dispose();
}
}
if (processor == null)
{
processor = new AudioThread.AudioThreadProcessor(bufferSize);
}
processor.EnsureThreadIsRunning();
processor.RequestedLatency = internalLatency;
if (hasDeviceChanged)
{
if (device != null)
{
AudioEngine.Log(
$"WaveInput: Configuration changed, device={device.Value}, requested latency={DriverLatency}");
try
{
waveIn = ((IWaveInputFactory)device.Tag).Create(DriverLatency);
bufferedWave = new BufferedWaveProvider(waveIn.WaveFormat);
bufferedWave.DiscardOnBufferOverflow = true;
sampleProvider = new WaveToSampleProvider(bufferedWave);
OutputFormat = sampleProvider.WaveFormat;
processor.WaveFormat = OutputFormat;
processor.Input = sampleProvider;
waveIn.DataAvailable += (s, a) => { bufferedWave.AddSamples(a.Buffer, 0, a.BytesRecorded); };
waveIn.StartRecording();
AudioEngine.Log("WaveInput: Started");
output = new AudioSampleBuffer(OutputFormat)
{
Processor = processor
};
}
catch (Exception e)
{
AudioEngine.Log(e);
waveIn = null;
}
}
}
status = waveIn != null ? "Recording" : "Uninitialized";
waveFormat = OutputFormat;
latency = processor.Latency;
cpuUsage = processor.CpuUsage;
bufferUnderRuns = processor.BufferUnderRuns;
return(output);
}
private void RunInThread()
{
float[] buffer = new float[bufferSize];
var stopWatch = Stopwatch.StartNew();
var clock = Stopwatch.StartNew();
var lastElapsed = 0.0;
AudioEngine.Log($"Starting AudioThread {GetHashCode()}...");
try
{
while (Running)
{
if (playBuffer.IsValid && Input != null)
{
if (playBuffer.BufferedDuration.Milliseconds < RequestedLatency)
{
try
{
stopWatch.Stop();
var idleTime = stopWatch.ElapsedTicks;
stopWatch.Restart();
while (playBuffer.BufferedDuration.Milliseconds < RequestedLatency)
{
Input?.Read(buffer, 0, buffer.Length);
playBuffer.AddSamples(buffer, 0, buffer.Length);
}
Latency = playBuffer.BufferedDuration.Milliseconds;
stopWatch.Stop();
var calcTime = stopWatch.ElapsedTicks;
stopWatch.Restart();
CpuUsage = (float)calcTime / (idleTime + calcTime);
}
catch (Exception e)
{
AudioEngine.Log(e);
}
}
else
{
if (RunWithoutOutput)
{
var elapsed = clock.Elapsed.TotalSeconds;
var delta = elapsed - lastElapsed;
lastElapsed = elapsed;
playBuffer.Advance(TimeSpan.FromSeconds(delta));
Thread.Sleep(RequestedLatency);
}
}
}
else
{
Thread.Sleep(100);
}
}
}
catch (Exception e)
{
AudioEngine.Log(e);
}
AudioEngine.Log($"AudioThread {GetHashCode()} terminated");
}