void GetAudioFormatsCount(IltmmCapture *pCapture)
{
IltmmAudioFormats *pAudioFormats;
IltmmAudioFormat *pAudioFormat;
int i;
long lCount;
long lFreq, lBits, lChannels;
long lFoundAt;
long lSelection;
VARIANT_BOOL bSelected;
// get the audio formats collection:
pCapture->get_AudioCaptureFormats(&pAudioFormats);
pAudioFormats->get_Count(&lCount);
for (i=0; i<lCount; i++)
{
// get the item at index I
pAudioFormats->Item(i, &pAudioFormat);
// do something with this item, like viewing its information:
pAudioFormat->get_SampleFrequency(&lFreq);
pAudioFormat->get_BitsPerSample(&lBits);
pAudioFormat->get_Channels(&lChannels);
pAudioFormat->get_Selected(&bSelected);
// view information...
// you may select the format if it matches some criteria:
if (lFreq == 8000 && lBits == 8 && lChannels == 1)
pAudioFormat->put_Selected(VARIANT_TRUE);
// free the item
pAudioFormat->Release();
}
// you might use the Find method to search for a specific format:
pAudioFormats->Find(16000, 16, 2, &lFoundAt);
if (lFoundAt != -1)
{
// do something with it:
// check if it is already selected, and if not, select it:
pAudioFormats->get_Selection(&lSelection);
if( lSelection != lFoundAt )
pAudioFormats->put_Selection(lFoundAt);
}
// free the audio formats collection
pAudioFormats->Release();
}
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document
Your email has been sent to support! Someone should be in touch! If your matter is urgent please come back into chat.
Chat Hours:
Monday - Friday, 8:30am to 6pm ET
Thank you for your feedback!
Please fill out the form again to start a new chat.
All agents are currently offline.
Chat Hours:
Monday - Friday
8:30AM - 6PM EST
To contact us please fill out this form and we will contact you via email.