public Task <AudioRecordResult> Record(AudioRecordOptions options = null)
{
_options = options ?? AudioRecordOptions.Empty;
_tcs = new TaskCompletionSource <AudioRecordResult>();
_bufferSize = AudioRecord.GetMinBufferSize(_options.SampleRate, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING) * 3;
_recorder = new AudioRecord(AudioSource.VoiceRecognition, _options.SampleRate, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING, _bufferSize);
if (_recorder.State == State.Initialized)
{
_recorder.StartRecording();
}
else
{
return(Task.FromResult(new AudioRecordResult($"AudioRecord initialisation returned unexpected state ({_recorder.State})")));
}
_isRecording = true;
_timeoutToken = new CancellationTokenSource();
Task.Run(() => RecordAudio());
Task.Run(() => Timeout());
return(_tcs.Task);
}
public Task <AudioRecordResult> Record(AudioRecordOptions options = null)
{
_options = options ?? AudioRecordOptions.Empty;
_tcs = new TaskCompletionSource <AudioRecordResult>();
var audioSession = AVAudioSession.SharedInstance();
var err = audioSession.SetCategory(AVAudioSessionCategory.PlayAndRecord);
if (err != null)
{
return(Task.FromResult(new AudioRecordResult($"AVAudioSession.SetCategory returned error '{err}'")));
}
err = audioSession.SetActive(true);
if (err != null)
{
return(Task.FromResult(new AudioRecordResult($"AVAudioSession.SetActive returned error '{err}'")));
}
_audioFilePath = Path.Combine(Path.GetTempPath(), $"audiorec_{DateTime.Now.Ticks}.wav");
Console.WriteLine("Audio File Path: " + _audioFilePath);
var url = NSUrl.FromFilename(_audioFilePath);
var config = new Dictionary <NSObject, NSObject>
{
{ AVAudioSettings.AVSampleRateKey, NSNumber.FromFloat((float)_options.SampleRate) },
{ AVAudioSettings.AVFormatIDKey, NSNumber.FromInt32((int)AudioToolbox.AudioFormatType.LinearPCM) },
{ AVAudioSettings.AVNumberOfChannelsKey, NSNumber.FromInt32(1) },
{ AVAudioSettings.AVLinearPCMBitDepthKey, NSNumber.FromInt32(16) },
{ AVAudioSettings.AVLinearPCMIsBigEndianKey, NSNumber.FromBoolean(false) },
{ AVAudioSettings.AVLinearPCMIsFloatKey, NSNumber.FromBoolean(false) }
};
var settings = NSDictionary.FromObjectsAndKeys(config.Keys.ToArray(), config.Values.ToArray());
_recorder = AVAudioRecorder.Create(url, new AudioSettings(settings), out err);
if (err != null)
{
return(Task.FromResult(new AudioRecordResult($"AVAudioRecorder.Create returned error '{err}'")));
}
_recorder.PrepareToRecord();
_recorder.Record();
Task.Run(() => Timeout());
return(_tcs.Task);
}
