如何分别访问立体声音频文件的左声道和右声道样本? [英] How to access to L and R channel samples of stereo audio file separately?

问题描述

假设我有8位(单声道和立体声) .wav 文件.处理此文件时，我必须声明指向样本数组的指针.

Suppose I have 8-bits (mono and stereo) .wav files. When processing of this file I have to declare pointer to array of samples.

假设我为样本创建数组.然后，如果它是 mono ，我将使用 for(i = 0; i< n; i ++)读取每个样本.

Suppose I create array for samples. Then if it is mono, I read each sample using for(i = 0; i < n; i++ ).

问:如何分别访问左右声道(立体声)?

PS

我已经阅读了很多有关单声道，立体声和* .wave"的信息，但我仍然不明白如何实现对每个声道的单独访问...

I've read a lot about "mono, stereo and *.wave" but still I can't understand how can I realise access to each channell separately...

推荐答案

您仍然有示例数组，问题是如何处理各个值.这是您的操作方式:

You still have array of samples, the question is how you address individual values. This is how you do it:

const UCHAR* pnSamples = ...
if(bMono)
{
  for(INT nIndex = 0; ...)
  {
    const UCHAR nSample = pnSamples[nIndex];
    // ...
  }
} else
if(bStereo)
{
  for(INT nIndex = 0; ...)
  {
    const UCHAR nLeftSample = pnSamples[2 * nIndex + 0];
    const UCHAR nRightSample = pnSamples[2 * nIndex + 1];
    // ...
  }
}

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