virtual public void LoadFromStream(Stream st)
{
while (true)
{
MMChunk ck = MMChunk.FromStream(st);
if (ck == null)
{
break;
}
m_chunkList.Add(ck);
}
}
public override MMChunk CreateSubChunk(FourCC fourCC, Stream st)
{
MMChunk ck = base.CreateSubChunk(fourCC, st);
int size = 0;
foreach (MMChunk cck in m_chunkList)
{
if (cck != ck)
{
size += cck.GetSize();
}
}
ck.SetStart(m_posStart + 4 + size);
return(ck);
}
virtual public void LoadFromStream(Stream st)
{
m_posStart = st.Position - 4;
byte[] data = new byte[4];
st.Read(data, 0, 4);
m_nSize = BitConverter.ToInt32(data, 0);
while (st.Position - m_posStart != m_nSize + 8)
{
MMChunk ck = MMChunk.FromStream(st);
if (ck == null)
{
break;
}
m_chunkList.Add(ck);
}
}
/// <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
}
