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C++ Floats::reinit方法代码示例

本文整理汇总了C++中Floats::reinit方法的典型用法代码示例。如果您正苦于以下问题:C++ Floats::reinit方法的具体用法?C++ Floats::reinit怎么用?C++ Floats::reinit使用的例子?那么, 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Floats的用法示例。


在下文中一共展示了Floats::reinit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: memcpy

/// A thread-safe version of CalcSummary.  BlockFile::CalcSummary
/// uses a static summary array across the class, which we can't use.
/// Get a buffer containing a summary block describing this sample
/// data.  This must be called by derived classes when they
/// are constructed, to allow them to construct their summary data,
/// after which they should write that data to their disk file.
///
/// This method also has the side effect of setting the mMin, mMax,
/// and mRMS members of this class.
///
/// Unlike BlockFile's implementation You SHOULD DELETE the returned buffer.
/// this is protected so it shouldn't be hard to deal with - just override
/// all BlockFile methods that use this method.
///
/// @param buffer A buffer containing the sample data to be analyzed
/// @param len    The length of the sample data
/// @param format The format of the sample data.
void *ODDecodeBlockFile::CalcSummary(samplePtr buffer, size_t len,
                             sampleFormat format, ArrayOf<char> &cleanup)
{
   cleanup.reinit(mSummaryInfo.totalSummaryBytes);
   char* localFullSummary = cleanup.get();

   memcpy(localFullSummary, bheaderTag, bheaderTagLen);

   float *summary64K = (float *)(localFullSummary + mSummaryInfo.offset64K);
   float *summary256 = (float *)(localFullSummary + mSummaryInfo.offset256);

   Floats floats;
   float *fbuffer;

   //mchinen: think we can hack this - don't allocate and copy if we don't need to.,
   if(format==floatSample)
   {
      fbuffer = (float*)buffer;
   }
   else
   {
      floats.reinit(len);
      fbuffer = floats.get();
      CopySamples(buffer, format,
               (samplePtr)fbuffer, floatSample, len);
   }

   BlockFile::CalcSummaryFromBuffer(fbuffer, len, summary256, summary64K);

   return localFullSummary;
}
开发者ID:MindFy,项目名称:audacity,代码行数:48,代码来源:ODDecodeBlockFile.cpp


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