// Add more buffers to the playback queue - keep it full
private void RefillPlayBuffers()
{
while (m_qBuffers.Count < MaxBuffers)
{
int cb = (int)(BufferLen * m_format.SamplesPerSec * m_format.Channels);
byte[] data = new byte[cb];
for (int i = 0; i < m_streamArray.Count; i++)
{
if (m_streamArray[i] != null)
{
cb = ((Stream)m_streamArray[i]).Read(data, 0, cb);
break;
}
}
if (cb == 0)
{
break;
}
WaveHeader hdr = new WaveHeader(data);
Monitor.Enter(m_HandleMap.SyncRoot);
m_HandleMap.Add(hdr.Pointer.ToInt32(), hdr);
Monitor.Exit(m_HandleMap.SyncRoot);
// prepare the header
CheckWaveError(NativeMethods.waveOutPrepareHeader(m_hWaveOut, hdr.Pointer, hdr.HeaderLength));
Monitor.Enter(m_qBuffers);
m_qBuffers.Enqueue(hdr);
Monitor.Exit(m_qBuffers);
}
}
/// <summary>
/// Creates a recording buffer
/// </summary>
/// <param name="dwBufferSize"></param>
/// <returns>new buffer as WaveHeader</returns>
private WaveHeader GetNewRecordBuffer(int dwBufferSize)
{
WaveHeader hdr = new WaveHeader(dwBufferSize);
Monitor.Enter(m_HandleMap.SyncRoot);
m_HandleMap.Add(hdr.Pointer.ToInt32(), hdr);
Monitor.Exit(m_HandleMap.SyncRoot);
// prepare the header
CheckWaveError(NativeMethods.waveInPrepareHeader(m_hWaveIn, hdr.Pointer, hdr.HeaderLength));
return(hdr);
}
private void m_recmw_WaveDoneMessage(object sender, IntPtr wParam, IntPtr lParam)
{
Debug.WriteLine("received WaveDone");
#if !NDOC
// Retrieve Waveheader object by the lpHeader pointer
Monitor.Enter(m_HandleMap.SyncRoot);
WaveHeader hdr = m_HandleMap[lParam.ToInt32()] as WaveHeader;
m_HandleMap.Remove(hdr.Pointer.ToInt32());
Monitor.Exit(m_HandleMap.SyncRoot);
// unprepare the header
CheckWaveError(NativeMethods.waveInUnprepareHeader(m_hWaveIn, hdr.Pointer, hdr.HeaderLength));
// hdr.RetrieveHeader();
m_qBuffers.Enqueue(hdr);
if (recordingFinished) // last chunk
{
DumpRecordBuffers();
CheckWaveError(NativeMethods.waveInClose(m_hWaveIn));
m_streamRecord.Flush();
m_streamRecord.Close();
mw_WaveCloseMessage(this);
// clean up the messageWindow
m_recmw.Dispose();
// reset the global flag
recording = false;
// set our event
if (DoneRecording != null)
{
DoneRecording();
}
foreach (WaveHeader whdr in m_HandleMap.Values)
{
whdr.Dispose();
}
m_HandleMap.Clear();
}
else
{
hdr = GetNewRecordBuffer(m_recBufferSize);
CheckWaveError(NativeMethods.waveInAddBuffer(m_hWaveIn, hdr.Pointer, hdr.HeaderLength));
DumpRecordBuffers();
}
if (PositionChanged != null)
{
PositionChanged(this, EventArgs.Empty);
}
#endif
}
private void DumpRecordBuffers()
{
while (m_qBuffers.Count > 0)
{
Monitor.Enter(m_qBuffers);
WaveHeader hdr = (WaveHeader)m_qBuffers.Dequeue();
Monitor.Exit(m_qBuffers);
try
{
m_streamRecord.Write(hdr.BufferData, 0, hdr.BytesRecorded);
// m_streamRecord.Write(hdr.GetData(), 0, hdr.BytesRecorded);
}
catch (Exception ex)
{
Debug.Write("Exception in stream.Write: " + ex.ToString());
}
hdr.Dispose();
}
}
private void BufferWriteThreadProc(object header)
{
WaveHeader hdr = header as WaveHeader;
Interlocked.Increment(ref m_workers);
Debug.WriteLine(string.Format("Queued Worker Thread on header {0} - Flags == {1} [{2} running]", hdr.Pointer.ToString(), hdr.Flags.ToString(), m_workers));
int ret = NativeMethods.waveOutWrite(m_hWaveOut, hdr.Pointer, hdr.HeaderLength);
while ((hdr.Flags & WHDR_FLAGS.DONE) == 0)
{
Thread.Sleep(1);
}
Interlocked.Decrement(ref m_workers);
Debug.WriteLine(string.Format("Worker Thread on header {0} Completed [{1} remain]", hdr.Pointer.ToString(), m_workers));
CheckWaveError(NativeMethods.waveOutUnprepareHeader(m_hWaveOut, hdr.Pointer, hdr.HeaderLength));
hdr.Dispose();
}
/// <summary>
/// Record sound data for specified number of seconds using given wave format
/// The stream will be a properly formatted RIFF file
/// </summary>
/// <param name="st">Stream into which recorded samples are written</param>
/// <param name="Seconds">Seconds of data to record</param>
/// <param name="format">Sound format to record in.</param>
public RiffStream RecordFor(Stream st, short Seconds, WaveFormat2 format)
{
// only allow 1 recording session at a time
if (recording)
{
throw new InvalidOperationException("Already recording");
}
m_hWaveIn = IntPtr.Zero;
// set our global flag
recording = true;
if (m_qBuffers == null)
{
m_qBuffers = new Queue <WaveHeader>(MaxBuffers);
}
if (m_HandleMap == null)
{
m_HandleMap = new System.Collections.Hashtable(MaxBuffers);
}
m_recformat = new WaveFormat2();
#if !NDOC
// create the callback message window
m_recmw = new SoundMessageWindow();
m_recmw.WaveDoneMessage += new WaveDoneHandler(m_recmw_WaveDoneMessage);
m_recmw.WaveCloseMessage += new WaveCloseHandler(mw_WaveCloseMessage);
m_recmw.WaveOpenMessage += new WaveOpenHandler(mw_WaveOpenMessage);
#endif
bool append = st.Length >= 42;
if (format.FormatTag == FormatTag.PCM)
{
m_recformat = format;
if (append)
{
m_streamRecord = RiffStream.Append(st);
}
else
{
m_streamRecord = RiffStream.OpenWrite(st, m_recformat);
}
}
else
{
m_recformat = WaveFormat2.GetPCMWaveFormat(SoundFormats.Mono8bit11kHz);
if (append)
{
m_streamRecord = ACMStream.Append(st, m_recformat);
}
else
{
m_streamRecord = ACMStream.OpenWrite(st, m_recformat, format);
}
}
#if !NDOC
// check for support of selected format
CheckWaveError(NativeMethods.waveInOpen(out m_hWaveIn, WAVE_MAPPER, m_recformat.GetBytes(), IntPtr.Zero, 0, WAVE_FORMAT_QUERY));
// open wave device
CheckWaveError(NativeMethods.waveInOpen(out m_hWaveIn, (uint)m_deviceID, m_recformat.GetBytes(), m_recmw.Hwnd, 0, CALLBACK_WINDOW));
m_recBufferSize = (int)(Math.Min((int)Seconds, BufferLen) * m_recformat.AvgBytesPerSec);
for (int i = 0; i < 2; i++)
{
WaveHeader hdr = GetNewRecordBuffer(m_recBufferSize);
// send the buffer to the device
CheckWaveError(NativeMethods.waveInAddBuffer(m_hWaveIn, hdr.Pointer, hdr.HeaderLength));
}
// begin recording
CheckWaveError(NativeMethods.waveInStart(m_hWaveIn));
recordingFinished = false;
m_recTimer = new Timer(new TimerCallback(RecTimerCallback), this, Seconds * 1000, Timeout.Infinite);
#endif
return(m_streamRecord);
}
private void mw_WaveDoneMessage(object sender, IntPtr wParam, IntPtr lParam)
{
Monitor.Enter(m_syncRoot);
try
{
if (m_hWaveOut == IntPtr.Zero)
{
return;
}
// Are there any pending buffers?
if (m_qBuffers.Count == 0)
{
try
{
// No more buffers - wait for all workers to end
while (m_workers > 0)
{
Thread.Sleep(10);
}
// Close the device
CheckWaveError(NativeMethods.waveOutClose(m_hWaveOut));
m_playing = false;
m_qBuffers = null;
m_hWaveOut = IntPtr.Zero;
// Notify clients
if (DonePlaying != null)
{
// On a separate thread in case the app calls Play in the Done handler.
ThreadPool.QueueUserWorkItem(RaiseDonePlaying, new Message {
LParam = lParam, WParam = wParam
});
}
}
catch (Exception e)
{
if (!e.Message.Equals("Sound still playing"))
{
throw e;
}
}
}
else
{
//Get next buffer (already prepared)
Monitor.Enter(m_qBuffers);
WaveHeader hdr = m_qBuffers.Dequeue() as WaveHeader;
Monitor.Exit(m_qBuffers);
// play the file
ThreadPool.QueueUserWorkItem(BufferWriteThreadProc, hdr);
// Add more buffers
RefillPlayBuffers();
}
if (PositionChanged != null)
{
PositionChanged(this, EventArgs.Empty);
}
}
finally
{
Monitor.Exit(m_syncRoot);
}
}
/// <summary>
/// Plays waveform contained in the given stream. Stream is exepcted to contain full riff header
/// </summary>
/// <param name="playStream">Stream with the waveform</param>
public void Play(Stream playStream)
{
Monitor.Enter(m_syncRoot);
try
{
if (m_playing)
{
return;
}
if (playStream == null)
{
throw new Exception("No valid WAV file has been opened");
}
#if !NDOC
if (m_qBuffers == null)
{
m_qBuffers = new Queue <WaveHeader>(MaxBuffers);
}
if (m_HandleMap == null)
{
m_HandleMap = new System.Collections.Hashtable(MaxBuffers);
}
// create a window to catch waveOutxxx messages
SoundMessageWindow mw = new SoundMessageWindow();
// wire in events
mw.WaveOpenMessage += new WaveOpenHandler(mw_WaveOpenMessage);
mw.WaveCloseMessage += new WaveCloseHandler(mw_WaveCloseMessage);
mw.WaveDoneMessage += new WaveDoneHandler(mw_WaveDoneMessage);
// add it to the global array
m_mwArray.Add(mw);
int i = m_mwArray.Count - 1;
if (playStream is ACMStream)
{
m_streamArray.Add(playStream as ACMStream);
}
else if (playStream is RiffStream)
{
m_streamArray.Add(playStream as RiffStream);
}
else
{
m_streamArray.Add(ACMStream.OpenRead(playStream));
}
m_format = (m_streamArray[m_streamArray.Count - 1] as RiffStream).Format;
// open the waveOut device and register the callback
CheckWaveError(NativeMethods.waveOutOpen(out m_hWaveOut, m_deviceID, m_format.GetBytes(), m_mwArray[i].Hwnd, 0, CALLBACK_WINDOW));
// see if we need to adjust playback rate
if ((PlaybackRate < 0.9f) || (PlaybackRate > 1.1f))
{
SetPlaybackRate(PlaybackRate);
}
RefillPlayBuffers();
while (m_qBuffers.Count > 0)
{
Monitor.Enter(m_qBuffers);
WaveHeader hdr = m_qBuffers.Dequeue();
Monitor.Exit(m_qBuffers);
// play the file
ThreadPool.QueueUserWorkItem(BufferWriteThreadProc, hdr);
m_playing = true;
if (m_qBuffers.Count <= 1)
{
RefillPlayBuffers();
}
}
#endif
}
finally
{
Monitor.Exit(m_syncRoot);
}
}
