// 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);
        }
示例#2
0
        /*  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();
        }
示例#3
0
        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;
            }
        }