本文整理汇总了C++中WaveFile::GetSilenceData方法的典型用法代码示例。如果您正苦于以下问题：C++ WaveFile::GetSilenceData方法的具体用法？C++ WaveFile::GetSilenceData怎么用？C++ WaveFile::GetSilenceData使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类WaveFile的用法示例。
在下文中一共展示了WaveFile::GetSilenceData方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: WriteSilence
// WriteSilence
//
// Writes silence to sound buffer. This is a helper method used by
// ServiceBuffer; it's not exposed to users of the AudioStream class.
BOOL AudioStream::WriteSilence(UINT size)
{
HRESULT hr;
LPBYTE lpbuf1 = NULL;
LPBYTE lpbuf2 = NULL;
DWORD dwsize1 = 0;
DWORD dwsize2 = 0;
DWORD dwbyteswritten1 = 0;
DWORD dwbyteswritten2 = 0;
BOOL fRtn = SUCCESS;
// Lock the sound buffer
hr = m_pdsb->Lock(m_cbBufOffset, size, (void**)(&lpbuf1), &dwsize1, (void**)(&lpbuf2), &dwsize2, 0);
if (hr == DS_OK)
{
// Get silence data for this file format. Although word sizes vary for different
// wave file formats, ::Lock will always return pointers on word boundaries.
// Because silence data for 16-bit PCM formats is 0x0000 or 0x00000000, we can
// get away with writing bytes and ignoring word size here.
BYTE bSilence = m_pwavefile->GetSilenceData();
// Write silence to sound buffer. Because the sound buffer is circular, we may have to
// do two write operations if locked portion of buffer wraps around to start of buffer.
memset(lpbuf1, bSilence, dwsize1);
dwbyteswritten1 = dwsize1;
// Second write required?
if (lpbuf2)
{
memset(lpbuf2, bSilence, dwsize2);
dwbyteswritten2 = dwsize2;
}
// Update our buffer offset and unlock sound buffer
m_cbBufOffset = (m_cbBufOffset + dwbyteswritten1 + dwbyteswritten2) % m_cbBufSize;
// m_pdsb->Unlock (lpbuf1, dwbyteswritten1, lpbuf2, dwbyteswritten2);
m_pdsb->Unlock(lpbuf1, dwsize1, lpbuf2, dwsize2);
}
else
{
// Error locking sound buffer
nprintf(("SOUND", "SOUND ==> Error, unable to lock sound buffer in AudioStr\n"));
fRtn = FAILURE;
}
return (fRtn);
}