Exemple #1
0
        /// <summary>
        /// creates a new wavebuffer
        /// </summary>
        /// <param name="hWaveOut">WaveOut device to write to</param>
        /// <param name="bufferSize">Buffer size in bytes</param>
        /// <param name="bufferFillStream">Stream to provide more data</param>
        /// <param name="waveOutLock">Lock to protect WaveOut API's from being called on >1 thread</param>
        public WaveOutBuffer(IntPtr hWaveOut, Int32 bufferSize, IWaveProvider bufferFillStream, object waveOutLock)
        {
            this.bufferSize  = bufferSize;
            buffer           = new byte[bufferSize];
            hBuffer          = GCHandle.Alloc(buffer, GCHandleType.Pinned);
            this.hWaveOut    = hWaveOut;
            waveStream       = bufferFillStream;
            this.waveOutLock = waveOutLock;

            // Added by charley at 2013/4/9
            ChannelMode = WaveOutChannelMode.Default;
            mVolumnSize = 1;
            mLeftVolumn = true;
            mVolumnSize = bufferFillStream.WaveFormat.BitsPerSample / 8;

            header              = new WaveHeader();
            hHeader             = GCHandle.Alloc(header);
            header.dataBuffer   = hBuffer.AddrOfPinnedObject();
            header.bufferLength = bufferSize;
            header.loops        = 1;
            hThis           = GCHandle.Alloc(this);
            header.userData = (IntPtr)hThis;
            lock (waveOutLock)
            {
                MmException.Try(WaveInterop.waveOutPrepareHeader(hWaveOut, header, Marshal.SizeOf(header)), "waveOutPrepareHeader");
            }
        }
Exemple #2
0
        protected override void WndProc(ref Message m)
        {
            WaveInterop.WaveMessage message = (WaveInterop.WaveMessage)m.Msg;

            switch (message)
            {
            case WaveInterop.WaveMessage.WaveOutDone:
            case WaveInterop.WaveMessage.WaveInData:
                IntPtr     hOutputDevice = m.WParam;
                WaveHeader waveHeader    = new WaveHeader();
                Marshal.PtrToStructure(m.LParam, waveHeader);
                waveCallback(hOutputDevice, message, IntPtr.Zero, waveHeader, IntPtr.Zero);
                break;

            case WaveInterop.WaveMessage.WaveOutOpen:
            case WaveInterop.WaveMessage.WaveOutClose:
            case WaveInterop.WaveMessage.WaveInClose:
            case WaveInterop.WaveMessage.WaveInOpen:
                waveCallback(m.WParam, message, IntPtr.Zero, null, IntPtr.Zero);
                break;

            default:
                base.WndProc(ref m);
                break;
            }
        }
Exemple #3
0
        private GCHandle hThis;   // for the user callback

        /// <summary>
        /// creates a new wavebuffer
        /// </summary>
        /// <param name="waveInHandle">WaveIn device to write to</param>
        /// <param name="bufferSize">Buffer size in bytes</param>
        public WaveInBuffer(IntPtr waveInHandle, Int32 bufferSize)
        {
            this.bufferSize   = bufferSize;
            buffer            = new byte[bufferSize];
            hBuffer           = GCHandle.Alloc(buffer, GCHandleType.Pinned);
            this.waveInHandle = waveInHandle;

            header              = new WaveHeader();
            hHeader             = GCHandle.Alloc(header);
            header.dataBuffer   = hBuffer.AddrOfPinnedObject();
            header.bufferLength = bufferSize;
            header.loops        = 1;
            hThis           = GCHandle.Alloc(this);
            header.userData = (IntPtr)hThis;

            MmException.Try(WaveInterop.waveInPrepareHeader(waveInHandle, header, Marshal.SizeOf(header)), "waveInPrepareHeader");
            //MmException.Try(WaveInterop.waveInAddBuffer(waveInHandle, header, Marshal.SizeOf(header)), "waveInAddBuffer");
        }
Exemple #4
0
        /// <summary>
        /// Called when we get a new buffer of recorded data
        /// </summary>
        private void Callback(IntPtr waveInHandle, WaveInterop.WaveMessage message, IntPtr userData, WaveHeader waveHeader, IntPtr reserved)
        {
            if (message == WaveInterop.WaveMessage.WaveInData)
            {
                var hBuffer = (GCHandle)waveHeader.userData;
                var buffer  = (WaveInBuffer)hBuffer.Target;

                if (recording)
                {
                    lastReturnedBufferIndex = Array.IndexOf(buffers, buffer);
                    RaiseDataAvailable(buffer);
                    try
                    {
                        buffer.Reuse();
                    }
                    catch (Exception e)
                    {
                        recording = false;
                        RaiseRecordingStopped(e);
                    }
                }
            }
        }
Exemple #5
0
 // made non-static so that playing can be stopped here
 private void Callback(IntPtr hWaveOut, WaveInterop.WaveMessage uMsg, IntPtr dwInstance, WaveHeader wavhdr, IntPtr dwReserved)
 {
     if (uMsg == WaveInterop.WaveMessage.WaveOutDone)
     {
         GCHandle      hBuffer = (GCHandle)wavhdr.userData;
         WaveOutBuffer buffer  = (WaveOutBuffer)hBuffer.Target;
         Interlocked.Decrement(ref queuedBuffers);
         Exception exception = null;
         // check that we're not here through pressing stop
         if (PlaybackState == PlaybackState.Playing)
         {
             // to avoid deadlocks in Function callback mode,
             // we lock round this whole thing, which will include the
             // reading from the stream.
             // this protects us from calling waveOutReset on another
             // thread while a WaveOutWrite is in progress
             lock (waveOutLock)
             {
                 try
                 {
                     if (buffer.OnDone())
                     {
                         Interlocked.Increment(ref queuedBuffers);
                     }
                 }
                 catch (Exception e)
                 {
                     // one likely cause is soundcard being unplugged
                     exception = e;
                 }
             }
         }
         if (queuedBuffers == 0)
         {
             if (callbackInfo.Strategy == WaveCallbackStrategy.FunctionCallback && playbackState == PlaybackState.Stopped)
             {
                 // the user has pressed stop
                 // DO NOT raise the playback stopped event from here
                 // since on the main thread we are still in the waveOutReset function
                 // Playback stopped will be raised elsewhere
             }
             else
             {
                 RaisePlaybackStoppedEvent(exception);
             }
         }
     }
 }
Exemple #6
0
 public static extern MmResult waveInUnprepareHeader(IntPtr hWaveIn, WaveHeader lpWaveInHdr, int uSize);
Exemple #7
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 public static extern MmResult waveInAddBuffer(IntPtr hWaveIn, WaveHeader pwh, int cbwh);
Exemple #8
0
 public static extern MmResult waveOutWrite(IntPtr hWaveOut, WaveHeader lpWaveOutHdr, int uSize);
Exemple #9
0
 public static extern MmResult waveOutPrepareHeader(IntPtr hWaveOut, WaveHeader lpWaveOutHdr, int uSize);