public async IAsyncEnumerable <Sample[]> EnumerateSamplesAsync(InputOption option, [EnumeratorCancellation] CancellationToken token = default)
{
using var pcmStream = new WaveFileReader("G:\\test.wav");
//using var pcmStream = WaveFormatConversionStream.CreatePcmStream(audio);
option.SamplingFrequency = pcmStream.WaveFormat.SampleRate;
var bytesCount = samplesBatchSize * pcmStream.BlockAlign;
var buffer = new byte[bytesCount];
//if pcmStream.BitsPerSample == 16 && pcmStream.Channels == 1
Func <byte[], int, float[]> getValues = Get16BitMono;
while (pcmStream.Position < pcmStream.Length)
{
int bytesRead = await pcmStream.ReadAsync(buffer, 0, buffer.Length, token);
if (bytesRead == 0)
{
continue;
}
var samples = new Sample[bytesRead / pcmStream.BlockAlign];
for (var i = 0; i < samples.Length; i++)
{
var values = getValues(buffer, i * pcmStream.BlockAlign);
samples[i] = new Sample(values);
}
yield return(samples);
await Task.Delay(50);
}
}
private static async IAsyncEnumerable <RecognizeRequest> GenerateRequestStream(string filename, string model)
{
yield return(new RecognizeRequest {
Config = new RecognitionConfig {
Model = new Model {
Id = model
},
Auth = new Auth {
ClientId = "ClientId",
DomainId = "DomainId",
ApiKey = "ApiKey"
}
}
});
using var reader = new WaveFileReader(filename);
int bytesPerSecond = reader.WaveFormat.AverageBytesPerSecond;
var buffer = new byte[bytesPerSecond];
while (reader.Position < reader.Length)
{
int bytesRead = await reader.ReadAsync(buffer, 0, bytesPerSecond);
if (bytesRead > 0)
{
yield return(new RecognizeRequest {
Sound = new Sound {
Samples = Google.Protobuf.ByteString.CopyFrom(buffer)
}
});
Thread.Sleep(1000);
}
}
yield return(new RecognizeRequest {
Finish = new Finish()
});
}