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IndexOf(int,int,int) Method

Summary

Returns the index of the first occurrence of an AudioFormat object whose name matches the given string.

Syntax

C++/CLI

public int IndexOf( 
   int SampleFrequency, 
   int BitsPerSample, 
   int Channels 
)

public: 
int IndexOf(  
   int SampleFrequency, 
   int BitsPerSample, 
   int Channels 
)

Parameters

SampleFrequency
A value representing the sample frequency of the AudioFormat to find.

BitsPerSample
A value representing the bits per sample of the AudioFormat to find.

Channels
A value representing the number of channels of the AudioFormat to find.

Return Value

The zero-based index position of the AudioFormat item found, or -1 if not found.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(false); 
 
public void IndexContainsExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   try 
   { 
      // set an audio device first, you should use your audio device name here 
      if (capturectrl.AudioDevices["USB"] == null) 
         throw new Exception("No USB audio device available"); 
 
      capturectrl.AudioDevices["USB"].Selected = true; 
 
      // reference the audio formats object 
      AudioFormats audioformats = capturectrl.AudioCaptureFormats; 
 
      // check the index of 8hz, 16-bit, stereo 
      int i = audioformats.IndexOf(8000, 16, 2); 
 
      // access the format via the collection indexer 
      AudioFormat af = audioformats[i]; 
 
      // check if the collection contains this format  
      // (it should we just got it with IndexOf above) 
      if (audioformats.Contains(af)) 
      { 
         // set the result to what we expect 
         _result = true; 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
}

Requirements

Target Platforms

Reference

AudioFormats Class

AudioFormats Members

Overload List

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Help Version 23.0.2024.2.29

Leadtools.MediaFoundation Assembly

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Leadtools.MediaFoundation Namespace

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