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私はUWPでwinphoneのコールレコーダーを作成しようとしています。私はオーディオグラフでこれをしようとしています。入力デバイス(マイク)、出力デバイス(スピーカー)のノードを作成し、それらをファイル(wave/mp3)に送信する必要があります。audiograph c#UWP
例外が表示されます。
AudioGraph graph;
AudioDeviceInputNode deviceInputNode;
AudioDeviceOutputNode deviceOutputNode;
AudioFileOutputNode fileOutputNode;
private async Task InitAudiographAsync()
{
AudioGraphSettings settings = new AudioGraphSettings(AudioRenderCategory.Speech);
CreateAudioGraphResult result = await AudioGraph.CreateAsync(settings);
if (result.Status == AudioGraphCreationStatus.Success)
{
graph = result.Graph;
CreateAudioDeviceOutputNodeResult deviceOutputNodeResult = await graph.CreateDeviceOutputNodeAsync();
if (deviceOutputNodeResult.Status == AudioDeviceNodeCreationStatus.Success)
{
deviceOutputNode = deviceOutputNodeResult.DeviceOutputNode;
var microphone = await DeviceInformation.CreateFromIdAsync(
MediaDevice.GetDefaultAudioCaptureId(AudioDeviceRole.Default));
var inProfile = MediaEncodingProfile.CreateWav(AudioEncodingQuality.High);
var deviceInputNodeResult = await graph.CreateDeviceInputNodeAsync(MediaCategory.Speech, inProfile.Audio, microphone);
if (deviceInputNodeResult.Status == AudioDeviceNodeCreationStatus.Success)
{
deviceInputNode = deviceInputNodeResult.DeviceInputNode;
FileSavePicker saveFilePicker = new FileSavePicker();
saveFilePicker.FileTypeChoices.Add("Windows Media Audio", new List<string>() { ".wma" });
saveFilePicker.FileTypeChoices.Add("MPEG Audio Layer-3", new List<string>() { ".mp3" });
saveFilePicker.SuggestedFileName = "New Audio Track";
StorageFile file = await saveFilePicker.PickSaveFileAsync();
// File can be null if cancel is hit in the file picker
if (file == null)
{
return;
}
MediaEncodingProfile mediaEncodingProfile;
switch (file.FileType.ToString().ToLowerInvariant())
{
case ".mp3":
mediaEncodingProfile = MediaEncodingProfile.CreateMp3(AudioEncodingQuality.High);
break;
case ".wav":
mediaEncodingProfile = MediaEncodingProfile.CreateWav(AudioEncodingQuality.High);
break;
default:
throw new ArgumentException();
}
CreateAudioFileOutputNodeResult fileOutputNodeResult = await graph.CreateFileOutputNodeAsync(file, mediaEncodingProfile);
if (fileOutputNodeResult.Status == AudioFileNodeCreationStatus.Success)
{
fileOutputNode = fileOutputNodeResult.FileOutputNode;
deviceInputNode.AddOutgoingConnection(deviceOutputNode);
deviceInputNode.AddOutgoingConnection(fileOutputNode);
graph.Start();
}
}
}
}
}