private static void ConvertSamples(IntPtr In, ASIOSampleType InType, Audio.SampleBuffer Out)
{
switch (InType)
{
//case ASIOSampleType.Int16MSB:
//case ASIOSampleType.Int24MSB:
//case ASIOSampleType.Int32MSB:
//case ASIOSampleType.Float32MSB:
//case ASIOSampleType.Float64MSB:
//case ASIOSampleType.Int32MSB16:
//case ASIOSampleType.Int32MSB18:
//case ASIOSampleType.Int32MSB20:
//case ASIOSampleType.Int32MSB24:
case ASIOSampleType.Int16LSB: Audio.Util.LEi16ToLEf64(In, Out.Raw, Out.Count); break;
//case ASIOSampleType.Int24LSB:
case ASIOSampleType.Int32LSB: Audio.Util.LEi32ToLEf64(In, Out.Raw, Out.Count); break;
case ASIOSampleType.Float32LSB: Audio.Util.LEf32ToLEf64(In, Out.Raw, Out.Count); break;
case ASIOSampleType.Float64LSB: Audio.Util.CopyMemory(Out.Raw, In, Out.Count * sizeof(double)); break;
//case ASIOSampleType.Int32LSB16:
//case ASIOSampleType.Int32LSB18:
//case ASIOSampleType.Int32LSB20:
//case ASIOSampleType.Int32LSB24:
default: throw new NotImplementedException("Unsupported sample type");
}
}
private void OnBufferSwitch(int Index, ASIOBool Direct)
{
Audio.SampleBuffer[] a = new Audio.SampleBuffer[input.Length];
for (int i = 0; i < input.Length; ++i)
{
a[i] = input[i].Samples;
ConvertSamples(
input[i].Info.buffers[Index],
input[i].Type,
a[i].Raw,
a[i].Count);
}
Audio.SampleBuffer[] b = new Audio.SampleBuffer[output.Length];
for (int i = 0; i < output.Length; ++i)
{
b[i] = output[i].Samples;
}
callback(buffer, a, b, sampleRate);
for (int i = 0; i < output.Length; ++i)
{
ConvertSamples(
b[i].Raw,
output[i].Info.buffers[Index],
output[i].Type,
b[i].Count);
}
}
private void OnBufferSwitch(int Index, ASIOBool Direct)
{
Audio.SampleBuffer[] a = new Audio.SampleBuffer[input.Length];
for (int i = 0; i < input.Length; ++i)
{
a[i] = input[i].Samples;
using (Audio.RawLock l = new Audio.RawLock(a[i], false, true))
ConvertSamples(
input[i].Info.buffers[Index],
input[i].Type,
l,
l.Count);
}
Audio.SampleBuffer[] b = new Audio.SampleBuffer[output.Length];
for (int i = 0; i < output.Length; ++i)
{
b[i] = output[i].Samples;
}
callback(buffer, a, b, sampleRate);
for (int i = 0; i < output.Length; ++i)
{
using (Audio.RawLock l = new Audio.RawLock(b[i], true, false))
ConvertSamples(
l,
output[i].Info.buffers[Index],
output[i].Type,
l.Count);
}
}
public Stream(Guid DeviceId, Audio.Stream.SampleHandler Callback, Channel[] Input, Channel[] Output)
: base(Input, Output)
{
Log.Global.WriteLine(MessageType.Info, "Instantiating ASIO stream with {0} input channels and {1} output channels.", Input.Length, Output.Length);
asio = new AsioObject(DeviceId);
asio.Init(IntPtr.Zero);
callback = Callback;
// Just use the driver's preferred buffer size.
bufferSize = asio.BufferSize.Preferred;
ASIOBufferInfo[] infos = new ASIOBufferInfo[Input.Length + Output.Length];
for (int i = 0; i < Input.Length; ++i)
{
infos[i].isInput = ASIOBool.True;
infos[i].channelNum = Input[i].Index;
}
for (int i = 0; i < Output.Length; ++i)
{
infos[Input.Length + i].isInput = ASIOBool.False;
infos[Input.Length + i].channelNum = Output[i].Index;
}
ASIOCallbacks callbacks = new ASIOCallbacks()
{
bufferSwitch = OnBufferSwitch,
sampleRateDidChange = OnSampleRateChange,
asioMessage = OnAsioMessage,
bufferSwitchTimeInfo = OnBufferSwitchTimeInfo
};
asio.CreateBuffers(infos, bufferSize, callbacks);
// Create input buffers.
input = new BufferInfo[Input.Length];
inputBuffers = new Audio.SampleBuffer[Input.Length];
for (int i = 0; i < Input.Length; ++i)
{
input[i] = new BufferInfo(infos[i], Input[i].Type);
inputBuffers[i] = new Audio.SampleBuffer(bufferSize);
}
// Create output buffers.
output = new BufferInfo[Output.Length];
outputBuffers = new Audio.SampleBuffer[Output.Length];
for (int i = 0; i < Output.Length; ++i)
{
output[i] = new BufferInfo(infos[Input.Length + i], Output[i].Type);
outputBuffers[i] = new Audio.SampleBuffer(bufferSize);
}
sampleRate = asio.SampleRate;
asio.Start();
}
private static double AmplifySignal(Audio.SampleBuffer Samples, double Gain)
{
double peak = 0.0;
for (int i = 0; i < Samples.Count; ++i)
{
double v = Samples[i];
v *= Gain;
peak = Math.Max(peak, Math.Abs(v));
Samples[i] = v;
}
return(peak);
}
public Buffer(WAVEFORMATEX Format, int Count)
{
handle = GCHandle.Alloc(this);
size = BlockAlignedSize(Format, Count);
samples = new Audio.SampleBuffer(Count) { Tag = this };
header = new WAVEHDR();
header.lpData = Marshal.AllocHGlobal(size);
header.dwUser = (IntPtr)handle;
header.dwBufferLength = (uint)size;
header.dwFlags = 0;
pin = GCHandle.Alloc(header, GCHandleType.Pinned);
}
private static double AmplifySignal(Audio.SampleBuffer Signal, double Gain)
{
double peak = 0.0;
using (Audio.SamplesLock samples = new Audio.SamplesLock(Signal, true, true))
{
for (int i = 0; i < samples.Count; ++i)
{
double v = samples[i];
v *= Gain;
peak = Math.Max(peak, Math.Abs(v));
samples[i] = v;
}
}
return(peak);
}
public Buffer(WAVEFORMATEX Format, int Count)
{
samples = new Audio.SampleBuffer(Count)
{
Tag = this
};
int size = BlockAlignedSize(Format, Count);
data = new byte[size];
dataPin = GCHandle.Alloc(data, GCHandleType.Pinned);
header = new WAVEHDR();
headerPin = GCHandle.Alloc(header, GCHandleType.Pinned);
header.lpData = dataPin.AddrOfPinnedObject();
header.dwBufferLength = (uint)size;
header.dwFlags = 0;
}
public Buffer(WAVEFORMATEX Format, int Count)
{
handle = GCHandle.Alloc(this);
size = BlockAlignedSize(Format, Count);
samples = new Audio.SampleBuffer(Count)
{
Tag = this
};
header = new WAVEHDR();
header.lpData = Marshal.AllocHGlobal(size);
header.dwUser = (IntPtr)handle;
header.dwBufferLength = (uint)size;
header.dwFlags = 0;
pin = GCHandle.Alloc(header, GCHandleType.Pinned);
}
private void Proc()
{
Audio.SampleBuffer[] input = new Audio.SampleBuffer[] { };
Audio.SampleBuffer[] output = new Audio.SampleBuffer[] { };
long samples = 0;
DateTime start = DateTime.Now;
while (run)
{
// Run at ~50 callbacks/second. This doesn't need to be super precise. In
// practice, Thread.Sleep is going to be +/- 10s of ms, but we'll still deliver
// the right number of samples on average.
Thread.Sleep(20);
double elapsed = (DateTime.Now - start).TotalSeconds;
int needed_samples = (int)(Math.Round(elapsed * SampleRate) - samples);
callback(needed_samples, input, output, SampleRate);
samples += needed_samples;
}
}
private void Proc()
{
// Send 60 chunks/second. This code won't be perfectly accurate if 60 doesn't divide SampleRate.
int count = (int)(SampleRate / 60);
Audio.SampleBuffer[] input = new Audio.SampleBuffer[] { };
Audio.SampleBuffer[] output = new Audio.SampleBuffer[] { };
long t0 = Util.Timer.Counter;
while (run)
{
long t1 = Util.Timer.Counter;
if ((t1 - t0) / Util.Timer.Frequency > count / SampleRate)
{
callback(count, input, output, SampleRate);
t0 = t1;
}
else
{
Thread.Sleep(0);
}
}
}
private void Proc()
{
// Send 60 chunks/second. This code won't be perfectly accurate if 60 doesn't divide SampleRate.
int count = (int)(SampleRate / 60);
Audio.SampleBuffer[] input = new Audio.SampleBuffer[] { };
Audio.SampleBuffer[] output = new Audio.SampleBuffer[] { };
long t0 = Util.Timer.Counter;
while (run)
{
long t1 = Util.Timer.Counter;
if ((t1 - t0) / Util.Timer.Frequency > count / SampleRate)
{
callback(count, input, output, SampleRate);
t0 = t1;
}
else
{
Thread.Sleep(0);
}
}
}
private void Proc()
{
Thread.CurrentThread.Name = "WaveAudio Stream";
try
{
Log.Global.WriteLine(MessageType.Info, "Entering streaming thread");
EventWaitHandle[] events = waveIn.Select(i => i.Callback).Concat(waveOut.Select(i => i.Callback)).ToArray();
Audio.SampleBuffer[] input = new Audio.SampleBuffer[waveIn.Length];
Audio.SampleBuffer[] output = new Audio.SampleBuffer[waveOut.Length];
while (!stop)
{
// TODO: Why can't we use this?
//if (!WaitHandle.WaitAll(events, 100))
// continue;
// Read from the inputs.
for (int i = 0; i < waveIn.Length; ++i)
{
InBuffer b = waveIn[i].GetBuffer();
if (b == null)
{
return;
}
using (Audio.RawLock l = new Audio.RawLock(b.Samples, false, true))
ConvertSamples(b.Data, format, l, l.Count);
b.Record();
input[i] = b.Samples;
}
// Get an available buffer from the outputs.
for (int i = 0; i < waveOut.Length; ++i)
{
OutBuffer b = waveOut[i].GetBuffer();
if (b == null)
{
return;
}
output[i] = b.Samples;
}
// Call the callback.
callback(buffer, input, output, format.nSamplesPerSec);
// Play the results.
for (int i = 0; i < output.Length; ++i)
{
OutBuffer b = (OutBuffer)output[i].Tag;
using (Audio.RawLock l = new Audio.RawLock(b.Samples, true, false))
ConvertSamples(l, b.Data, format, l.Count);
b.Play();
}
}
}
catch (Exception Ex)
{
Log.Global.WriteLine(MessageType.Error, "Unhandled exception on streaming thread '{0}': {1}", Ex.GetType().FullName, Ex.ToString());
}
Log.Global.WriteLine(MessageType.Info, "Exiting streaming thread");
}
public Buffer(ASIOBufferInfo Info, ASIOSampleType Type, int Count)
{
info = Info;
type = Type;
samples = new Audio.SampleBuffer(Count);
}
public Buffer(ASIOBufferInfo Info, ASIOSampleType Type, int Count)
{
info = Info;
type = Type;
samples = new Audio.SampleBuffer(Count);
}
private void Proc()
{
Thread.CurrentThread.Name = "WaveAudio Stream";
try
{
Log.Global.WriteLine(MessageType.Info, "Entering streaming thread");
Audio.SampleBuffer[] input = new Audio.SampleBuffer[waveIn.Length];
Audio.SampleBuffer[] output = new Audio.SampleBuffer[waveOut.Length];
while (!stop)
{
// Read from the inputs.
for (int i = 0; i < waveIn.Length; ++i)
{
InBuffer b = null;
do
{
b = waveIn[i].GetBuffer();
} while (b == null && !stop);
if (b != null)
{
ConvertSamples(b.Data, format, b.Samples.Raw, b.Samples.Count);
b.Record();
input[i] = b.Samples;
}
}
// Get an available buffer from the outputs.
for (int i = 0; i < waveOut.Length; ++i)
{
OutBuffer b = null;
do
{
b = waveOut[i].GetBuffer();
} while (b == null && !stop);
if (b != null)
{
output[i] = b.Samples;
}
}
if (!stop)
{
Debug.Assert(input.All(i => i != null));
Debug.Assert(output.All(i => i != null));
// Call the callback.
callback(buffer, input, output, format.nSamplesPerSec);
// Play the results.
for (int i = 0; i < output.Length; ++i)
{
OutBuffer b = (OutBuffer)output[i].Tag;
ConvertSamples(b.Samples.Raw, b.Data, format, b.Samples.Count);
b.Play();
}
}
}
}
catch (Exception Ex)
{
Log.Global.WriteLine(MessageType.Error, "Unhandled exception on streaming thread '{0}': {1}", Ex.GetType().FullName, Ex.ToString());
}
Log.Global.WriteLine(MessageType.Info, "Exiting streaming thread");
}
private void OnBufferSwitch(int Index, ASIOBool Direct)
{
Audio.SampleBuffer[] a = new Audio.SampleBuffer[input.Length];
for (int i = 0; i < input.Length; ++i)
{
a[i] = input[i].Samples;
using (Audio.RawLock l = new Audio.RawLock(a[i], false, true))
ConvertSamples(
input[i].Info.buffers[Index],
input[i].Type,
l,
l.Count);
}
Audio.SampleBuffer[] b = new Audio.SampleBuffer[output.Length];
for (int i = 0; i < output.Length; ++i)
b[i] = output[i].Samples;
callback(buffer, a, b, sampleRate);
for (int i = 0; i < output.Length; ++i)
{
using (Audio.RawLock l = new Audio.RawLock(b[i], true, false))
ConvertSamples(
l,
output[i].Info.buffers[Index],
output[i].Type,
l.Count);
}
}
