/// <summary>
///
/// </summary>
/// <param name="settings"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public override async Task <IStreamingRecognition> StartStreamingRecognitionAsync(
AudioSettings?settings = null,
CancellationToken cancellationToken = default)
{
settings ??= SupportedStreamingSettings.First();
IamToken ??= await RequestIamTokenByOAuthTokenAsync(OAuthToken, cancellationToken).ConfigureAwait(false);
var channel = new Channel("stt.api.cloud.yandex.net", 443, new SslCredentials());
var client = new SttService.SttServiceClient(channel);
var call = client.StreamingRecognize(new Metadata
{
{ "authorization", $"Bearer {IamToken}" }
}, cancellationToken: cancellationToken);
await call.RequestStream.WriteAsync(new StreamingRecognitionRequest
{
Config = new RecognitionConfig
{
Specification = new RecognitionSpec
{
LanguageCode = Lang,
ProfanityFilter = ProfanityFilter,
Model = Topic,
AudioEncoding = settings.Format switch
{
AudioFormat.Ogg => RecognitionSpec.Types.AudioEncoding.OggOpus,
AudioFormat.Raw => RecognitionSpec.Types.AudioEncoding.Linear16Pcm,
_ => RecognitionSpec.Types.AudioEncoding.Unspecified,
},
/// <summary>
///
/// </summary>
/// <param name="settings"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public override Task <IStreamingRecognition> StartStreamingRecognitionAsync(AudioSettings?settings = null, CancellationToken cancellationToken = default)
{
settings ??= SupportedStreamingSettings.First();
return(Task.FromResult <IStreamingRecognition>(
new WitAiStreamingRecognition(settings, Token)));
}