Leadtools.MediaFoundation Namespace > TargetAudioTypes Class : Count Property |
'Declaration Public ReadOnly Property Count As Integer
'Usage Dim instance As TargetAudioTypes Dim value As Integer value = instance.Count
public int Count {get;}
Imports Leadtools Imports Leadtools.MediaFoundation Imports LeadtoolsMediaFoundationExamples.Fixtures Public _result As Boolean = False Public _form As CaptureCtrlForm = New CaptureCtrlForm() Public Sub IndexContainsExample() ' reference the capture control Dim capturectrl As CaptureCtrl = _form.CaptureCtrl Try ' set an audio device first, you should use your audio device name here If capturectrl.AudioDevices("USB") Is Nothing Then Throw New Exception("No USB audio device available") End If capturectrl.AudioDevices("USB").Selected = True ' reference the target formats object Dim formats As TargetFormats = capturectrl.TargetFormats ' reference the target format object Dim tf As TargetFormat = formats(TargetFormatType.MP4) ' reference the target audio formats object Dim taformats As TargetAudioFormats = tf.AudioFormats ' check the index using a name string Dim i As Integer = taformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}") ' AAC ' reference the target audio format object Dim taformat As TargetAudioFormat = taformats(i) ' select the target audio format taformat.Selected = True ' get target audio types collection Dim targetaudiotypes As TargetAudioTypes = taformat.AudioTypes ' get target audio types count If targetaudiotypes.Count <= 0 Then Throw New Exception("No audio types available for the selected audio format") End If ' reset target audio types targetaudiotypes.Reset() ' set audio properties on the target format. tf.AudioAvgBytesPerSecond = 24000 tf.AudioBitsPerSample = 16 tf.AudioNumChannels = 1 tf.AudioSamplesPerSecond = 48000 ' find the index of the audio type which have the audio properties selected in the target format Dim nIndex As Integer = targetaudiotypes.FindFormat(tf) ' access the type via the collection indexer Dim tatype As TargetAudioType = targetaudiotypes(nIndex) ' check if the collection contains this type ' (it should we just got it with IndexOf above) If targetaudiotypes.Contains(tatype) Then ' set the result to what we expect _result = True End If Catch e1 As Exception _result = False End Try End Sub
using Leadtools; using Leadtools.MediaFoundation; using LeadtoolsMediaFoundationExamples.Fixtures; public bool _result = false; public CaptureCtrlForm _form = new CaptureCtrlForm(); 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 target formats object TargetFormats formats = capturectrl.TargetFormats; // reference the target format object TargetFormat tf = formats[TargetFormatType.MP4]; // reference the target audio formats object TargetAudioFormats taformats = tf.AudioFormats; // check the index using a name string int i = taformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}");// AAC // reference the target audio format object TargetAudioFormat taformat = taformats[i]; // select the target audio format taformat.Selected = true; // get target audio types collection TargetAudioTypes targetaudiotypes = taformat.AudioTypes; // get target audio types count if (targetaudiotypes.Count <= 0) { throw new Exception("No audio types available for the selected audio format"); } // reset target audio types targetaudiotypes.Reset(); // set audio properties on the target format. tf.AudioAvgBytesPerSecond = 24000; tf.AudioBitsPerSample = 16; tf.AudioNumChannels = 1; tf.AudioSamplesPerSecond = 48000; // find the index of the audio type which have the audio properties selected in the target format int nIndex = targetaudiotypes.FindFormat(tf); // access the type via the collection indexer TargetAudioType tatype = targetaudiotypes[nIndex]; // check if the collection contains this type // (it should we just got it with IndexOf above) if (targetaudiotypes.Contains(tatype)) { // set the result to what we expect _result = true; } } catch (Exception) { _result = false; } }