private void TestLength()
{
int l;
m_pSample.SetLength(12);
m_pSample.GetLength(out l);
Debug.Assert(l == 12);
m_pSample.GetMaxLength(out l);
Debug.Assert(l == MAXLENGTH);
}
public int Read(AudioBuffer buff, int maxLength)
{
buff.Prepare(this, maxLength);
int buff_offset = 0;
int buff_size = buff.ByteLength;
while (m_pSampleSize < buff_size)
{
if (m_pSampleSize > 0)
{
IntPtr pdwBuffer;
m_pSample.GetBuffer(out pdwBuffer);
Marshal.Copy((IntPtr)(pdwBuffer.ToInt64() + m_pSampleOffset), buff.Bytes, buff_offset, m_pSampleSize);
buff_size -= m_pSampleSize;
buff_offset += m_pSampleSize;
m_sampleOffset += m_pSampleSize;
m_pSampleSize = 0;
Marshal.ReleaseComObject(m_pSample);
m_pSample = null;
}
long cnsSampleTime;
long cnsDuration;
SampleFlag flags;
int dwOutputNum;
short wStreamNum;
try
{
m_syncReader.GetNextSample(m_wStreamNum, out m_pSample, out cnsSampleTime, out cnsDuration, out flags, out dwOutputNum, out wStreamNum);
}
catch (COMException ex)
{
// EOF
if (ex.ErrorCode == NSResults.E_NO_MORE_SAMPLES)
{
if ((m_sampleOffset % PCM.BlockAlign) != 0)
{
throw new Exception("(m_sampleOffset % PCM.BlockAlign) != 0");
}
m_sampleCount = m_sampleOffset / PCM.BlockAlign;
if ((buff_offset % PCM.BlockAlign) != 0)
{
throw new Exception("(buff_offset % PCM.BlockAlign) != 0");
}
return(buff.Length = buff_offset / PCM.BlockAlign);
}
throw ex;
}
//if (dwOutputNum != m_dwAudioOutputNum || wStreamNum != m_wStreamNum)
//{
//}
m_pSampleOffset = 0;
m_pSample.GetLength(out m_pSampleSize);
}
if (buff_size > 0)
{
IntPtr pdwBuffer;
m_pSample.GetBuffer(out pdwBuffer);
Marshal.Copy((IntPtr)(pdwBuffer.ToInt64() + m_pSampleOffset), buff.Bytes, buff_offset, buff_size);
m_pSampleOffset += buff_size;
m_pSampleSize -= buff_size;
m_sampleOffset += buff_size;
buff_offset += buff_size;
buff_size = 0;
}
if ((buff_offset % PCM.BlockAlign) != 0)
{
throw new Exception("(buff_offset % PCM.BlockAlign) != 0");
}
return(buff.Length = buff_offset / PCM.BlockAlign);
}