Esempio n. 1
0
        /// <summary>
        /// Create a new image capture object.
        /// </summary>
        /// <param name="capture">The capture provider.</param>
        public SoundCapture(CaptureSoundSample capture)
        {
            if (capture == null)
            {
                throw new ArgumentException("The capture parameter must be set to a valid Filter.\n");
            }

            _capture = capture;
            OnCreated();
        }
Esempio n. 2
0
        /// <summary>
        /// Start sample sound capture continuous.
        /// </summary>
        /// <param name="capture">The capture provider.</param>
        /// <param name="captureHandler">The capture method where image data is to be written to.</param>
        /// <param name="soundCaptureType">The sound capture type.</param>
        private void StartSampleSoundCaptureContinuous(CaptureSoundSample capture, Action <MemoryStream> captureHandler, SoundCaptureType soundCaptureType = SoundCaptureType.Wav)
        {
            MemoryStream stream = new MemoryStream();

            byte[] buffer     = null;
            int    sampleSize = 0;
            IntPtr ip         = IntPtr.Zero;

            // While not shutting down, and still capturing.
            while (!_stop)
            {
                try
                {
                    // capture image
                    ip = capture.GetSnapshotSoundPointer();

                    // Allocate the memory byte size.
                    sampleSize = (int)capture.Channels * capture.SampleRate;
                    buffer     = new byte[sampleSize];

                    // Copy the sound data to the buffer.
                    Marshal.Copy(ip, buffer, 0, buffer.Length);

                    // Format the PCM raw sound data.
                    FormatSound(stream, capture, buffer, soundCaptureType);

                    // Send the sound to the client.
                    captureHandler(stream);

                    // Empty the stream
                    stream.SetLength(0);
                }
                catch (Exception) { }
                finally
                {
                    if (ip != IntPtr.Zero)
                    {
                        Marshal.FreeCoTaskMem(ip);
                        ip = IntPtr.Zero;
                    }
                }
            }

            try { }
            finally
            {
                if (stream != null)
                {
                    stream.Close();
                }
            }
        }
Esempio n. 3
0
        /// <summary>
        /// Format the raw PCM sound data.
        /// </summary>
        /// <param name="stream">The memory stream that will contain the sound data.</param>
        /// <param name="capture">The capture provider.</param>
        /// <param name="rawPCMSound">The raw PCM sound data.</param>
        /// <param name="soundCaptureType">The sound capture type.</param>
        private void FormatSound(MemoryStream stream, CaptureSoundSample capture, byte[] rawPCMSound, SoundCaptureType soundCaptureType = SoundCaptureType.Wav)
        {
            switch (soundCaptureType)
            {
            case SoundCaptureType.Pcm:
                // Write the raw PCm sound data.
                stream.Write(rawPCMSound, 0, rawPCMSound.Length);
                stream.Flush();
                break;

            case SoundCaptureType.Wav:
            default:
                // Write the wave formatted data from the raw PCM sound data.
                WaveStructure waveStructure = WaveStructure.CreateDefaultStructure(capture.Channels, capture.SampleRate, capture.BitsPerSample, rawPCMSound);
                WaveFormat    waveFormat    = new WaveFormat();
                waveFormat.Write(stream, waveStructure);
                break;
            }
        }
Esempio n. 4
0
        /// <summary>
        /// Dispose(bool disposing) executes in two distinct scenarios.
        /// If disposing equals true, the method has been called directly
        /// or indirectly by a user's code. Managed and unmanaged resources
        /// can be disposed.
        /// If disposing equals false, the method has been called by the
        /// runtime from inside the finalizer and you should not reference
        /// other objects. Only unmanaged resources can be disposed.
        /// </summary>
        protected virtual void Dispose(bool disposing)
        {
            // Check to see if Dispose has already been called.
            if (!this.disposed)
            {
                // If disposing equals true, dispose all managed
                // and unmanaged resources.
                if (disposing)
                {
                    if (_capture != null)
                    {
                        _capture.Dispose();
                    }
                }

                // Call the appropriate methods to clean up
                // unmanaged resources here.
                _capture = null;

                // Note disposing has been done.
                disposed = true;
            }
        }