static void RunGame()
{
// init picovoice platform
string keywordPath = $"pico_chess_{_platform}.ppn";
string contextPath = $"chess_{_platform}.rhn";
using Picovoice picovoice = new Picovoice(keywordPath, WakeWordCallback, contextPath, InferenceCallback);
DrawBoard("\n");
// create and start recording
short[] recordingBuffer = new short[picovoice.FrameLength];
ALCaptureDevice captureDevice = ALC.CaptureOpenDevice(null, picovoice.SampleRate, ALFormat.Mono16, picovoice.FrameLength * 2);
{
ALC.CaptureStart(captureDevice);
while (!_quitGame)
{
int samplesAvailable = ALC.GetAvailableSamples(captureDevice);
if (samplesAvailable > picovoice.FrameLength)
{
ALC.CaptureSamples(captureDevice, ref recordingBuffer[0], picovoice.FrameLength);
picovoice.Process(recordingBuffer);
}
Thread.Yield();
}
// stop and clean up resources
Console.WriteLine("Bye!");
ALC.CaptureStop(captureDevice);
ALC.CaptureCloseDevice(captureDevice);
}
}
// ALC_API void ALC_APIENTRY alcCaptureSamples( ALCdevice *device, ALCvoid *buffer, ALCsizei samples );
/// <summary>This function completes a capture operation, and does not block.</summary>
/// <typeparam name="T">The buffer datatype.</typeparam>
/// <param name="device">A pointer to a capture device.</param>
/// <param name="buffer">A reference to a buffer, which must be large enough to accommodate the number of samples.</param>
/// <param name="samples">The number of samples to be retrieved.</param>
public static unsafe void CaptureSamples <T>(ALCaptureDevice device, ref T buffer, int samples)
where T : unmanaged
{
fixed(T *ptr = &buffer)
{
CaptureSamples(device, ptr, samples);
}
}
private void DoRecording()
{
int sampleRate = 44100;
using MemoryStream stream = new MemoryStream();
using BinaryWriter writer = new BinaryWriter(stream);
short[] recording = new short[1024];
int numSamples = 0;
Thread.Sleep(200);
ALCaptureDevice captureDevice = ALC.CaptureOpenDevice(null, sampleRate, ALFormat.Mono16, 1024);
{
ALC.CaptureStart(captureDevice);
while (_record)
{
int current = 0;
while (current < recording.Length)
{
int samplesAvailable = ALC.GetAvailableSamples(captureDevice);
if (samplesAvailable > 512)
{
int samplesToRead = Math.Min(samplesAvailable, recording.Length - current);
ALC.CaptureSamples(captureDevice, ref recording[current], samplesToRead);
current += samplesToRead;
}
Thread.Yield();
}
byte[] result = new byte[current * sizeof(short)];
Buffer.BlockCopy(recording, 0, result, 0, result.Length);
writer.Write(result);
numSamples += current;
}
ALC.CaptureStop(captureDevice);
ALC.CaptureCloseDevice(captureDevice);
}
writer.Flush();
stream.Flush();
WriteDataToFile(stream, numSamples, sampleRate);
}
public static bool InitDevice()
{
ALDevice audioDev = ALC.OpenDevice(null);
AlcError err = ALC.GetError(audioDev);
if (err != AlcError.NoError)
{
return(false);
}
ALContext aLContext = ALC.CreateContext(audioDev, new int[0]);
bool makeRs = ALC.MakeContextCurrent(aLContext);
err = ALC.GetError(audioDev);
if (!makeRs || err != AlcError.NoError)
{
return(false);
}
//ALCdevice* inputDevice = alcCaptureOpenDevice(NULL, FREQ, AL_FORMAT_MONO16, FREQ / 2);
ALCaptureDevice captureDev = ALC.CaptureOpenDevice(null, FREQ, ALFormat.Mono16, FREQ / 2); // FREQ
ALC.CaptureStart(captureDev);
err = ALC.GetError(audioDev);
if (err != AlcError.NoError)
{
return(false);
}
int[] buffer = AL.GenBuffers(16);
err = ALC.GetError(audioDev);
if (err != AlcError.NoError)
{
return(false);
}
return(true);
}
public static extern unsafe void CaptureSamples(ALCaptureDevice device, void *buffer, int samples);
/// <summary> /// Checks to see that the ALC_ENUMERATION_EXT extension is present. This will always be available in 1.1 devices or /// later. /// </summary> /// <param name="device">The device to check the extension is present for.</param> /// <returns>If the ALC_ENUMERATION_EXT extension was present.</returns> public static bool IsEnumerationExtensionPresent(ALCaptureDevice device) => IsExtensionPresent(device, "ALC_ENUMERATION_EXT");
public static extern void GetInteger(ALCaptureDevice device, AlcGetInteger param, int size, out int data);
// ALC_API void ALC_APIENTRY alcGetIntegerv( ALCdevice *device, ALCenum param, ALCsizei size, ALCint *buffer );
/// <summary>
/// Gets the current number of available capture samples.
/// </summary>
/// <param name="device">The device.</param>
/// <returns>The number of capture samples available.</returns>
public static int GetAvailableSamples(ALCaptureDevice device)
{
GetInteger(device, AlcGetInteger.CaptureSamples, 1, out int result);
return(result);
}
/// <summary>This function completes a capture operation, and does not block.</summary>
/// <typeparam name="T">The buffer datatype.</typeparam>
/// <param name="device">A pointer to a capture device.</param>
/// <param name="buffer">A buffer, which must be large enough to accommodate the number of samples.</param>
/// <param name="samples">The number of samples to be retrieved.</param>
public static void CaptureSamples <T>(ALCaptureDevice device, T[] buffer, int samples)
where T : unmanaged
{
CaptureSamples(device, ref buffer[0], samples);
}
public static extern unsafe void GetInteger(ALCaptureDevice device, AlcGetInteger param, int size, int *data);
public static extern void CaptureSamples(ALCaptureDevice device, ref short buffer, int samples);
/// <summary>
/// Creates an input audio stream, instantiates an instance of Porcupine object, and monitors the audio stream for
/// occurrencec of the wake word(s). It prints the time of detection for each occurrence and the wake word.
/// </summary>
/// <param name="modelPath">Absolute path to the file containing model parameters. If not set it will be set to the default location.</param>
/// <param name="keywordPaths">Absolute paths to keyword model files. If not set it will be populated from `keywords` argument.</param>
/// <param name="keywordPaths">Absolute paths to keyword model files. If not set it will be populated from `keywords` argument.</param>
/// <param name="sensitivities">
/// Sensitivities for detecting keywords. Each value should be a number within [0, 1]. A higher sensitivity results in fewer
/// misses at the cost of increasing the false alarm rate. If not set 0.5 will be used.
/// </param>
/// <param name="keywords">
/// List of keywords (phrases) for detection. The list of available (default) keywords can be retrieved
/// using `Porcupine.KEYWORDS`. If `keyword_paths` is set then this argument will be ignored.
/// </param>
/// <param name="audioDeviceIndex">Optional argument. If provided, audio is recorded from this input device. Otherwise, the default audio input device is used.</param>
/// <param name="outputPath">Optional argument. If provided, recorded audio will be stored in this location at the end of the run.</param>
public static void RunDemo(string modelPath, List <string> keywordPaths, List <string> keywords, List <float> sensitivities,
int?audioDeviceIndex = null, string outputPath = null)
{
Porcupine porcupine = null;
BinaryWriter outputFileWriter = null;
int totalSamplesWritten = 0;
try
{
// init porcupine wake word engine
porcupine = Porcupine.Create(modelPath, keywordPaths, keywords, sensitivities);
// get keyword names for labeling detection results
if (keywords == null)
{
keywords = keywordPaths.Select(k => Path.GetFileNameWithoutExtension(k).Split("_")[0]).ToList();
}
// open stream to output file
if (!string.IsNullOrWhiteSpace(outputPath))
{
outputFileWriter = new BinaryWriter(new FileStream(outputPath, FileMode.OpenOrCreate, FileAccess.Write));
WriteWavHeader(outputFileWriter, 1, 16, 16000, 0);
}
// choose audio device
string deviceName = null;
if (audioDeviceIndex != null)
{
List <string> captureDeviceList = ALC.GetStringList(GetEnumerationStringList.CaptureDeviceSpecifier).ToList();
if (captureDeviceList != null && audioDeviceIndex.Value < captureDeviceList.Count)
{
deviceName = captureDeviceList[audioDeviceIndex.Value];
}
else
{
throw new ArgumentException("No input device found with the specified index. Use --show_audio_devices to show" +
"available inputs", "--audio_device_index");
}
}
Console.Write("Listening for {");
for (int i = 0; i < keywords.Count; i++)
{
Console.Write($" {keywords[i]}({sensitivities[i]})");
}
Console.Write(" }\n");
// create and start recording
short[] recordingBuffer = new short[porcupine.FrameLength];
ALCaptureDevice captureDevice = ALC.CaptureOpenDevice(deviceName, 16000, ALFormat.Mono16, porcupine.FrameLength * 2);
{
ALC.CaptureStart(captureDevice);
while (!Console.KeyAvailable)
{
int samplesAvailable = ALC.GetAvailableSamples(captureDevice);
if (samplesAvailable > porcupine.FrameLength)
{
ALC.CaptureSamples(captureDevice, ref recordingBuffer[0], porcupine.FrameLength);
int result = porcupine.Process(recordingBuffer);
if (result >= 0)
{
Console.WriteLine($"[{DateTime.Now.ToLongTimeString()}] Detected '{keywords[result]}'");
}
if (outputFileWriter != null)
{
foreach (short sample in recordingBuffer)
{
outputFileWriter.Write(sample);
}
totalSamplesWritten += recordingBuffer.Length;
}
}
Thread.Yield();
}
// stop and clean up resources
Console.WriteLine("Stopping...");
ALC.CaptureStop(captureDevice);
ALC.CaptureCloseDevice(captureDevice);
}
}
finally
{
if (outputFileWriter != null)
{
// write size to header and clean up
WriteWavHeader(outputFileWriter, 1, 16, 16000, totalSamplesWritten);
outputFileWriter.Flush();
outputFileWriter.Dispose();
}
porcupine?.Dispose();
}
}
public static extern void CaptureSamples(ALCaptureDevice device, IntPtr buffer, int samples);
public static void Main(string[] args)
{
Console.WriteLine("Hello!");
IEnumerable <string> devices = ALC.ALC.GetStringList(GetEnumerationStringList.DeviceSpecifier);
Console.WriteLine($"Devices: {string.Join(", ", devices)}");
// Get the default device, then go though all devices and select the AL soft device if it exists.
string deviceName = ALC.ALC.GetString(ALDevice.Null, AlcGetString.DefaultDeviceSpecifier);
foreach (string d in devices)
{
if (d.Contains("OpenAL Soft"))
{
deviceName = d;
}
}
IEnumerable <string> allDevices =
EnumerateAll.GetStringList(GetEnumerateAllContextStringList.AllDevicesSpecifier);
Console.WriteLine($"All Devices: {string.Join(", ", allDevices)}");
ALDevice device = ALC.ALC.OpenDevice(deviceName);
ALContext context = ALC.ALC.CreateContext(device, (int[])null);
ALC.ALC.MakeContextCurrent(context);
CheckALError("Start");
ALC.ALC.GetInteger(device, AlcGetInteger.MajorVersion, 1, out int alcMajorVersion);
ALC.ALC.GetInteger(device, AlcGetInteger.MinorVersion, 1, out int alcMinorVersion);
string alcExts = ALC.ALC.GetString(device, AlcGetString.Extensions);
ALContextAttributes attrs = ALC.ALC.GetContextAttributes(device);
Console.WriteLine($"Attributes: {attrs}");
string exts = AL.AL.Get(ALGetString.Extensions);
string rend = AL.AL.Get(ALGetString.Renderer);
string vend = AL.AL.Get(ALGetString.Vendor);
string vers = AL.AL.Get(ALGetString.Version);
Console.WriteLine(
$"Vendor: {vend}, \nVersion: {vers}, \nRenderer: {rend}, \nExtensions: {exts}, \nALC Version: {alcMajorVersion}.{alcMinorVersion}, \nALC Extensions: {alcExts}");
Console.WriteLine("Available devices: ");
IEnumerable <string> list = EnumerateAll.GetStringList(GetEnumerateAllContextStringList.AllDevicesSpecifier);
foreach (string item in list)
{
Console.WriteLine(" " + item);
}
Console.WriteLine("Available capture devices: ");
list = ALC.ALC.GetStringList(GetEnumerationStringList.CaptureDeviceSpecifier);
foreach (string item in list)
{
Console.WriteLine(" " + item);
}
int auxSlot = 0;
if (EFX.IsExtensionPresent(device))
{
Console.WriteLine("EFX extension is present!!");
EFX.GenEffect(out int effect);
EFX.Effect(effect, EffectInteger.EffectType, (int)EffectType.Reverb);
EFX.GenAuxiliaryEffectSlot(out auxSlot);
EFX.AuxiliaryEffectSlot(auxSlot, EffectSlotInteger.Effect, effect);
}
// Record a second of data
CheckALError("Before record");
short[] recording = new short[44100 * 4];
ALCaptureDevice captureDevice = ALC.ALC.CaptureOpenDevice(null, 44100, ALFormat.Mono16, 1024);
{
ALC.ALC.CaptureStart(captureDevice);
int current = 0;
while (current < recording.Length)
{
int samplesAvailable = ALC.ALC.GetAvailableSamples(captureDevice);
if (samplesAvailable > 512)
{
int samplesToRead = Math.Min(samplesAvailable, recording.Length - current);
ALC.ALC.CaptureSamples(captureDevice, ref recording[current], samplesToRead);
current += samplesToRead;
}
Thread.Yield();
}
ALC.ALC.CaptureStop(captureDevice);
}
CheckALError("After record");
// Playback the recorded data
CheckALError("Before data");
AL.AL.GenBuffer(out int alBuffer);
// short[] sine = new short[44100 * 1];
// FillSine(sine, 4400, 44100);
// FillSine(recording, 440, 44100);
AL.AL.BufferData(alBuffer, ALFormat.Mono16, ref recording[0], recording.Length * 2, 44100);
CheckALError("After data");
AL.AL.Listener(ALListenerf.Gain, 0.1f);
AL.AL.GenSource(out int alSource);
AL.AL.Source(alSource, ALSourcef.Gain, 1f);
AL.AL.Source(alSource, ALSourcei.Buffer, alBuffer);
if (EFX.IsExtensionPresent(device))
{
EFX.Source(alSource, EFXSourceInteger3.AuxiliarySendFilter, auxSlot, 0, 0);
}
AL.AL.SourcePlay(alSource);
Console.WriteLine("Before Playing: " + AL.AL.GetErrorString(AL.AL.GetError()));
if (DeviceClock.IsExtensionPresent(device))
{
long[] clockLatency = new long[2];
DeviceClock.GetInteger(device, GetInteger64.DeviceClock, clockLatency);
Console.WriteLine("Clock: " + clockLatency[0] + ", Latency: " + clockLatency[1]);
CheckALError(" ");
}
if (SourceLatency.IsExtensionPresent())
{
SourceLatency.GetSource(alSource, SourceLatencyVector2d.SecOffsetLatency, out Vector2d values);
SourceLatency.GetSource(alSource, SourceLatencyVector2i.SampleOffsetLatency, out int values1,
out int values2, out long values3);
Console.WriteLine("Source latency: " + values);
Console.WriteLine($"Source latency 2: {Convert.ToString(values1, 2)}, {values2}; {values3}");
CheckALError(" ");
}
while (AL.AL.GetSourceState(alSource) == ALSourceState.Playing)
{
if (SourceLatency.IsExtensionPresent())
{
SourceLatency.GetSource(alSource, SourceLatencyVector2d.SecOffsetLatency, out Vector2d values);
SourceLatency.GetSource(alSource, SourceLatencyVector2i.SampleOffsetLatency, out int values1,
out int values2, out long values3);
Console.WriteLine("Source latency: " + values);
Console.WriteLine($"Source latency 2: {Convert.ToString(values1, 2)}, {values2}; {values3}");
CheckALError(" ");
}
if (DeviceClock.IsExtensionPresent(device))
{
long[] clockLatency = new long[2];
DeviceClock.GetInteger(device, GetInteger64.DeviceClock, 1, clockLatency);
Console.WriteLine("Clock: " + clockLatency[0] + ", Latency: " + clockLatency[1]);
CheckALError(" ");
}
Thread.Sleep(10);
}
AL.AL.SourceStop(alSource);
// Test float32 format extension
if (EXTFloat32.IsExtensionPresent())
{
Console.WriteLine("Testing float32 format extension with a sine wave...");
float[] sine = new float[44100 * 2];
for (int i = 0; i < sine.Length; i++)
{
sine[i] = MathF.Sin(440 * MathF.PI * 2 * (i / (float)sine.Length));
}
int buffer = AL.AL.GenBuffer();
EXTFloat32.BufferData(buffer, FloatBufferFormat.Mono, sine, 44100);
AL.AL.Listener(ALListenerf.Gain, 0.1f);
AL.AL.Source(alSource, ALSourcef.Gain, 1f);
AL.AL.Source(alSource, ALSourcei.Buffer, buffer);
AL.AL.SourcePlay(alSource);
while (AL.AL.GetSourceState(alSource) == ALSourceState.Playing)
{
Thread.Sleep(10);
}
AL.AL.SourceStop(alSource);
}
// Test double format extension
if (EXTDouble.IsExtensionPresent())
{
Console.WriteLine("Testing float64 format extension with a saw wave...");
double[] saw = new double[44100 * 2];
for (int i = 0; i < saw.Length; i++)
{
double t = i / (double)saw.Length * 440;
saw[i] = t - Math.Floor(t);
}
int buffer = AL.AL.GenBuffer();
EXTDouble.BufferData(buffer, DoubleBufferFormat.Mono, saw, 44100);
AL.AL.Listener(ALListenerf.Gain, 0.1f);
AL.AL.Source(alSource, ALSourcef.Gain, 1f);
AL.AL.Source(alSource, ALSourcei.Buffer, buffer);
AL.AL.SourcePlay(alSource);
while (AL.AL.GetSourceState(alSource) == ALSourceState.Playing)
{
Thread.Sleep(10);
}
AL.AL.SourceStop(alSource);
}
ALC.ALC.MakeContextCurrent(ALContext.Null);
ALC.ALC.DestroyContext(context);
ALC.ALC.CloseDevice(device);
Console.WriteLine("Goodbye!");
Console.WriteLine("Playing sound...");
ExampleSound();
Console.WriteLine("Done!");
}
public static extern void CaptureStop([In] ALCaptureDevice device);
public static extern bool CaptureCloseDevice([In] ALCaptureDevice device);
/// <summary> /// Checks to see that the ALC_EXT_CAPTURE extension is present. This will always be available in 1.1 devices or later. /// </summary> /// <param name="device">The device to check the extension is present for.</param> /// <returns>If the ALC_EXT_CAPTURE extension was present.</returns> public static bool IsCaptureExtensionPresent(ALCaptureDevice device) => IsExtensionPresent(device, "ALC_EXT_CAPTURE");
public static extern bool IsExtensionPresent([In] ALCaptureDevice device, [In] string extname);
/// <summary>
/// Creates an input audio stream, instantiates an instance of Rhino object, and infers the intent from spoken commands.
/// </summary>
/// <param name="contextPath">
/// Absolute path to file containing context model (file with `.rhn` extension). A context represents the set of
/// expressions(spoken commands), intents, and intent arguments(slots) within a domain of interest.
/// </param>
/// <param name="modelPath">Absolute path to the file containing model parameters. If not set it will be set to the default location.</param>
/// <param name="sensitivity">
/// Inference sensitivity. It should be a number within [0, 1]. A higher sensitivity value results in
/// fewer misses at the cost of (potentially) increasing the erroneous inference rate. If not set, the default value of 0.5 will be used.
/// </param>
/// <param name="audioDeviceIndex">Optional argument. If provided, audio is recorded from this input device. Otherwise, the default audio input device is used.</param>
/// <param name="outputPath">Optional argument. If provided, recorded audio will be stored in this location at the end of the run.</param>
public static void RunDemo(string contextPath, string modelPath, float sensitivity, int?audioDeviceIndex = null, string outputPath = null)
{
Rhino rhino = null;
BinaryWriter outputFileWriter = null;
int totalSamplesWritten = 0;
try
{
// init rhino speech-to-intent engine
rhino = Rhino.Create(contextPath, modelPath, sensitivity);
// open stream to output file
if (!string.IsNullOrWhiteSpace(outputPath))
{
outputFileWriter = new BinaryWriter(new FileStream(outputPath, FileMode.OpenOrCreate, FileAccess.Write));
WriteWavHeader(outputFileWriter, 1, 16, 16000, 0);
}
// choose audio device
string deviceName = null;
if (audioDeviceIndex != null)
{
List <string> captureDeviceList = ALC.GetStringList(GetEnumerationStringList.CaptureDeviceSpecifier).ToList();
if (captureDeviceList != null && audioDeviceIndex.Value < captureDeviceList.Count)
{
deviceName = captureDeviceList[audioDeviceIndex.Value];
}
else
{
throw new ArgumentException("No input device found with the specified index. Use --show_audio_devices to show" +
"available inputs", "--audio_device_index");
}
}
Console.WriteLine(rhino.ContextInfo);
Console.WriteLine("Listening...\n");
// create and start recording
short[] recordingBuffer = new short[rhino.FrameLength];
ALCaptureDevice captureDevice = ALC.CaptureOpenDevice(deviceName, 16000, ALFormat.Mono16, rhino.FrameLength * 2);
{
ALC.CaptureStart(captureDevice);
while (!Console.KeyAvailable)
{
int samplesAvailable = ALC.GetAvailableSamples(captureDevice);
if (samplesAvailable > rhino.FrameLength)
{
ALC.CaptureSamples(captureDevice, ref recordingBuffer[0], rhino.FrameLength);
bool isFinalized = rhino.Process(recordingBuffer);
if (isFinalized)
{
Inference inference = rhino.GetInference();
if (inference.IsUnderstood)
{
Console.WriteLine("{");
Console.WriteLine($" intent : '{inference.Intent}'");
Console.WriteLine(" slots : {");
foreach (KeyValuePair <string, string> slot in inference.Slots)
{
Console.WriteLine($" {slot.Key} : '{slot.Value}'");
}
Console.WriteLine(" }");
Console.WriteLine("}");
}
else
{
Console.WriteLine("Didn't understand the command.");
}
}
if (outputFileWriter != null)
{
foreach (short sample in recordingBuffer)
{
outputFileWriter.Write(sample);
}
totalSamplesWritten += recordingBuffer.Length;
}
}
Thread.Yield();
}
// stop and clean up resources
Console.WriteLine("Stopping...");
ALC.CaptureStop(captureDevice);
ALC.CaptureCloseDevice(captureDevice);
}
}
finally
{
if (outputFileWriter != null)
{
// write size to header and clean up
WriteWavHeader(outputFileWriter, 1, 16, 16000, totalSamplesWritten);
outputFileWriter.Flush();
outputFileWriter.Dispose();
}
rhino?.Dispose();
}
}