// OLD methods (did not work with event handlers in connection with the unmanaged code...)
/*
* private void GenerateSoundSnippet()
* {
* int numberOfBytesRecorded = waveHeader.bytesRecorded;
* if (numberOfBytesRecorded > 0)
* {
* byte[] newSoundData = new byte[numberOfBytesRecorded];
* Marshal.Copy(waveHeader.dataPointer, newSoundData, 0, numberOfBytesRecorded);
* totalNumberOfBytesRecorded += numberOfBytesRecorded;
* OnSnippetRecorded(newSoundData, totalNumberOfBytesRecorded);
* }
* }
*
* private void OnSnippetRecorded(byte[] recordedBytes, int numberofBytes)
* {
* if (SnippetRecorded != null)
* {
* WAVRecorderEventArgs e = new WAVRecorderEventArgs(recordedBytes, numberofBytes);
* EventHandler<WAVRecorderEventArgs> handler = SnippetRecorded;
* handler(this, e);
* }
* }
*
* private void OnRecordingStopped()
* {
* if (RecordingStopped != null)
* {
* EventHandler handler = RecordingStopped;
* handler(this, EventArgs.Empty);
* }
* } */
#endregion
#region Public methods
public void Start()
{
recordingIndex = 0;
timeRecordingList = new List <Tuple <int, DateTime, byte[]> >();
storageCount = (int)Math.Round(storageDuration * numberOfSnippetsPerSecond);
isRecording = true;
waveIn = new AudioRecordingDelegate(callbackWaveIn);
waveHandle = new IntPtr();
InitializeWaveFormat();
bufferLength = (uint)(waveFormat.averageBytesPerSecond / numberOfSnippetsPerSecond);
headerPin = GCHandle.Alloc(waveHeader, GCHandleType.Pinned);
buffer = new byte[bufferLength];
bufferPin = GCHandle.Alloc(buffer, GCHandleType.Pinned);
waveInOpen(ref waveHandle, (uint)deviceId, ref waveFormat, Marshal.GetFunctionPointerForDelegate(waveIn), (uint)0, (uint)CALLBACK_FUNCTION);
SetupBuffer();
waveInStart(waveHandle);
}
/* SetupWaveIn
*
* Setups and starts recording, globals used to pass data into a WaveReader object
*
* Return void
*/
private void setupWaveIn()
{
waveIn = this.callbackWaveIn;
handle = new IntPtr();
WAVEFORMAT format;
fmtCode = format.wFormatTag = 1;
channels = format.nChannels = 1;
format.nSamplesPerSec = 11025;
sampleRate = (int)format.nSamplesPerSec;
bitDepth = format.wBitsPerSample = 8;
fmtBlockAlign = format.nBlockAlign = 1; // Convert.ToUInt16(format.nChannels * format.wBitsPerSample);
format.nAvgBytesPerSec = 11025;
fmtAvgBPS = (int)format.nAvgBytesPerSec; //format.nSamplesPerSec * format.nBlockAlign;
bufferLength = 16384; // format.nAvgBytesPerSec / 800;
format.cbSize = 0;
buffer = new byte[bufferLength];
bufferPin = GCHandle.Alloc(buffer, GCHandleType.Pinned);
//4294967295 = WAVE_MAPPER aka unsigned int (-1)
int i = waveInOpen(ref handle, 4294967295, ref format, Marshal.GetFunctionPointerForDelegate(waveIn), 0, CALLBACK_FUNCTION);
if (i != 0)
{
this.Text = "Error: waveInOpen";
return;
}
setupBuffer();
i = waveInStart(handle);
if (i != 0)
{
this.Text = "Error: waveInStart" + i;
return;
}
SystemSounds.Beep.Play();
}
private void setupWaveIn()
{
waveIn = this.callbackWaveIn;
handle = new IntPtr();
WAVEFORMAT format;
format.wFormatTag = 1;
format.nChannels = 1;
format.nSamplesPerSec = 11025;
format.wBitsPerSample = 8;
format.nBlockAlign = 1; // Convert.ToUInt16(format.nChannels * format.wBitsPerSample);
format.nAvgBytesPerSec = 11025; //format.nSamplesPerSec * format.nBlockAlign;
bufferLength = 16384; // format.nAvgBytesPerSec / 800;
format.cbSize = 0;
buffer = new byte[bufferLength];
bufferPin = GCHandle.Alloc(buffer, GCHandleType.Pinned);
//4294967295 = WAVE_MAPPER aka unsigned int (-1)
// int i = waveInOpen(ref handle, ((unchecked uint)-1), ref format, Marshal.GetFunctionPointerForDelegate(waveIn), 0, CALLBACK_FUNCTION);
uint wavemapper = (unchecked ((uint)-1));
int i = waveInOpen(ref handle, wavemapper, ref format, Marshal.GetFunctionPointerForDelegate(waveIn), 0, CALLBACK_FUNCTION);
if (i != 0)
{
this.Text = "Error: waveInOpen";
return;
}
setupBuffer();
// setupBuffer();//2nd buffer
i = waveInStart(handle);
if (i != 0)
{
this.Text = "Error: waveInStart" + i;
}
}