virtual public MMChunk CreateSubChunk(FourCC fourCC, Stream st)
{
if (fourCC == FourCC.Riff)
{
MMChunk ck = new RiffChunk(st);
m_chunkList.Add(ck);
return(ck);
}
else if (fourCC == FourCC.Wave)
{
MMChunk ck = new WaveChunk(st);
m_chunkList.Add(ck);
return(ck);
}
else if (fourCC == FourCC.Fmt)
{
MMChunk ck = new FmtChunk(st, null);
m_chunkList.Add(ck);
return(ck);
}
else if (fourCC == FourCC.Data)
{
MMChunk ck = new DataChunk(st);
m_chunkList.Add(ck);
return(ck);
}
return(null);
}
static public MMChunk FromStream(Stream st)
{
if (!st.CanRead)
{
return(null);
}
if (st.Position > st.Length - 4)
{
return(null);
}
byte[] data = new byte[4];
st.Read(data, 0, 4);
FourCC fourCC = BitConverter.ToInt32(data, 0);
if (fourCC == FourCC.Riff)
{
RiffChunk ck = new RiffChunk(st);
ck.LoadFromStream(st);
return(ck);
}
else if (fourCC == FourCC.Wave)
{
WaveChunk ck = new WaveChunk(st);
ck.LoadFromStream(st);
return(ck);
}
else if (fourCC == FourCC.Fmt)
{
FmtChunk ck = new FmtChunk(st, null);
ck.LoadFromStream(st);
return(ck);
}
else if (fourCC == FourCC.Data)
{
DataChunk ck = new DataChunk(st);
ck.LoadFromStream(st);
return(ck);
}
else
{
return(new MMChunk(fourCC, st));
}
}
virtual public MMChunk CreateSubChunk(FourCC fourCC, Stream st)
{
if ( fourCC == FourCC.Riff )
{
MMChunk ck = new RiffChunk(st);
m_chunkList.Add(ck);
return ck;
}
else if ( fourCC == FourCC.Wave )
{
MMChunk ck = new WaveChunk(st);
m_chunkList.Add(ck);
return ck;
}
else if ( fourCC == FourCC.Fmt )
{
MMChunk ck = new FmtChunk(st, null);
m_chunkList.Add(ck);
return ck;
}
else if ( fourCC == FourCC.Data )
{
MMChunk ck = new DataChunk(st);
m_chunkList.Add(ck);
return ck;
}
return null;
}
static public MMChunk FromStream(Stream st)
{
if ( !st.CanRead )
return null;
if ( st.Position > st.Length - 4 )
return null;
byte[] data = new byte[4];
st.Read(data, 0, 4);
FourCC fourCC = BitConverter.ToInt32(data, 0);
if ( fourCC == FourCC.Riff )
{
RiffChunk ck = new RiffChunk(st);
ck.LoadFromStream(st);
return ck;
}
else if ( fourCC == FourCC.Wave )
{
WaveChunk ck = new WaveChunk(st);
ck.LoadFromStream(st);
return ck;
}
else if ( fourCC == FourCC.Fmt )
{
FmtChunk ck = new FmtChunk(st, null);
ck.LoadFromStream(st);
return ck;
}
else if ( fourCC == FourCC.Data )
{
DataChunk ck = new DataChunk(st);
ck.LoadFromStream(st);
return ck;
}
else
return new MMChunk(fourCC, st);
}
/// <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="SoundFormat">Sound format to record in.</param>
public void RecordFor(Stream st, short Seconds, SoundFormats SoundFormat)
{
m_hWaveIn = IntPtr.Zero;
// only allow 1 recording session at a time
if (recording)
{
throw new InvalidOperationException("Already recording");
}
// set our global flag
recording = true;
if (m_qBuffers == null)
{
m_qBuffers = new Queue(MaxBuffers);
}
if (m_HandleMap == null)
{
m_HandleMap = new Hashtable(MaxBuffers);
}
m_recformat = new WaveFormatEx();
#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
// set up format
#region long format switch()
switch (SoundFormat)
{
case SoundFormats.Mono16bit11kHz:
m_recformat.Channels = 1;
m_recformat.SamplesPerSec = 11025;
m_recformat.BitsPerSample = 16;
break;
case SoundFormats.Mono16bit22kHz:
m_recformat.Channels = 1;
m_recformat.SamplesPerSec = 22050;
m_recformat.BitsPerSample = 16;
break;
case SoundFormats.Mono16bit44kHz:
m_recformat.Channels = 1;
m_recformat.SamplesPerSec = 44100;
m_recformat.BitsPerSample = 16;
break;
case SoundFormats.Mono8bit11kHz:
m_recformat.Channels = 1;
m_recformat.SamplesPerSec = 11025;
m_recformat.BitsPerSample = 8;
break;
case SoundFormats.Mono8bit22kHz:
m_recformat.Channels = 1;
m_recformat.SamplesPerSec = 22050;
m_recformat.BitsPerSample = 8;
break;
case SoundFormats.Mono8bit44kHz:
m_recformat.Channels = 1;
m_recformat.SamplesPerSec = 44100;
m_recformat.BitsPerSample = 8;
break;
case SoundFormats.Stereo16bit11kHz:
m_recformat.Channels = 2;
m_recformat.SamplesPerSec = 11025;
m_recformat.BitsPerSample = 16;
break;
case SoundFormats.Stereo16bit22kHz:
m_recformat.Channels = 2;
m_recformat.SamplesPerSec = 22050;
m_recformat.BitsPerSample = 16;
break;
case SoundFormats.Stereo16bit44kHz:
m_recformat.Channels = 2;
m_recformat.SamplesPerSec = 44100;
m_recformat.BitsPerSample = 16;
break;
case SoundFormats.Stereo8bit11kHz:
m_recformat.Channels = 2;
m_recformat.SamplesPerSec = 11025;
m_recformat.BitsPerSample = 8;
break;
case SoundFormats.Stereo8bit22kHz:
m_recformat.Channels = 2;
m_recformat.SamplesPerSec = 22050;
m_recformat.BitsPerSample = 8;
break;
case SoundFormats.Stereo8bit44kHz:
m_recformat.Channels = 2;
m_recformat.SamplesPerSec = 44100;
m_recformat.BitsPerSample = 8;
break;
}
#endregion long format switch()
m_recformat.FormatTag = WAVE_FORMAT_PCM;
m_recformat.AvgBytesPerSec = m_recformat.SamplesPerSec * m_recformat.Channels;
m_recformat.BlockAlign = (short)((m_recformat.Channels * m_recformat.BitsPerSample) / 8);
m_recformat.Size = 0;
m_ck = new RiffChunk(st);
m_ck.BeginWrite();
WaveChunk wck = m_ck.CreateSubChunk(FourCC.Wave, st) as WaveChunk;
wck.BeginWrite();
FmtChunk fck = wck.CreateSubChunk(FourCC.Fmt, st) as FmtChunk;
fck.BeginWrite();
fck.WaveFormat = m_recformat;
fck.Write(fck.WaveFormat.GetBytes());
fck.EndWrite();
DataChunk dck = wck.CreateSubChunk(FourCC.Data, st) as DataChunk;
m_streamRecord = dck.BeginWrite();
#if !NDOC
// check for support of selected format
CheckWaveError(Wave.waveInOpen(out m_hWaveIn, WAVE_MAPPER, m_recformat, IntPtr.Zero, 0, WAVE_FORMAT_QUERY));
// open wave device
CheckWaveError(Wave.waveInOpen(out m_hWaveIn, (uint)m_deviceID, m_recformat, m_recmw.Hwnd, 0, CALLBACK_WINDOW));
m_recBufferSize = (int)(Math.Min((int)Seconds, BufferLen) * m_recformat.SamplesPerSec * m_recformat.Channels);
for (int i = 0; i < 2; i++)
{
WaveHeader hdr = GetNewRecordBuffer(m_recBufferSize);
// send the buffer to the device
CheckWaveError(Wave.waveInAddBuffer(m_hWaveIn, hdr.Header, hdr.HeaderLength));
}
// begin recording
CheckWaveError(Wave.waveInStart(m_hWaveIn));
recordingFinished = false;
m_recTimer = new Timer(new TimerCallback(RecTimerCallback), this, Seconds * 1000, Timeout.Infinite);
#endif
}
/// <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)
{
if (m_playing)
{
return;
}
MMChunk ck = MMChunk.FromStream(playStream);
if (ck != null && ck.FourCC == FourCC.Riff)
{
if (ck[0] is WaveChunk)
{
DataChunk dck = ck[0].FindChunk(FourCC.Data) as DataChunk;
if (dck != null)
{
playStream = dck.BeginRead();
}
FmtChunk fck = ck[0].FindChunk(FourCC.Fmt) as FmtChunk;
if (fck != null)
{
m_format = fck.WaveFormat;
}
}
}
if (playStream == null)
{
throw new Exception("No valid WAV file has been opened");
}
#if !NDOC
if (m_qBuffers == null)
{
m_qBuffers = new Queue(MaxBuffers);
}
if (m_HandleMap == null)
{
m_HandleMap = new 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
int i = m_mwArray.Add(mw);
m_streamArray.Add(playStream);
// open the waveOut device and register the callback
CheckWaveError(Wave.waveOutOpen(out m_hWaveOut, m_deviceID, m_format, ((SoundMessageWindow)m_mwArray[i]).Hwnd, 0, CALLBACK_WINDOW));
RefillPlayBuffers();
Monitor.Enter(m_qBuffers.SyncRoot);
WaveHeader hdr = m_qBuffers.Dequeue() as WaveHeader;
Monitor.Exit(m_qBuffers.SyncRoot);
// play the file
int ret = Wave.waveOutWrite(m_hWaveOut, hdr.Header, hdr.HeaderLength);
CheckWaveError(ret);
m_playing = true;
#endif
}