public static async void Timer_Tick(object?state)
{
// If we're still uploading, don't double-start
if (_uploading)
{
return;
}
_uploading = true;
Debug.Assert(_client != null);
Debug.Assert(_dataDirectory != null);
Debug.Assert(_gazeDevice != null);
if (_salt == null)
{
_salt = await ReadSalt();
if (_salt == null)
{
return;
}
}
var dataDirectory = new DirectoryInfo(_dataDirectory);
foreach (var fileInfo in dataDirectory.GetFiles())
{
if (FileNaming.IsInProgress(fileInfo.FullName))
{
// Skip uploading in-progress file.
continue;
}
var putRequest = new PutObjectRequest
{
BucketName = BUCKET_NAME,
Key = $"observer_data/{SCHEMA_VERSION}/{FileNaming.CloudStoragePath(fileInfo, _gazeDevice, _salt)}"
};
PutObjectResponse putResponse;
using (var inputStream = fileInfo.OpenRead())
{
putRequest.InputStream = inputStream;
putResponse = await _client.PutObjectAsync(putRequest);
}
if (putResponse.HttpStatusCode == HttpStatusCode.OK)
{
fileInfo.Delete();
}
}
_uploading = false;
}
/**
* If a FlacWriter object currently exists, stops it and removes the
* InProgress suffix from its file name.
*/
private void MaybeEndCurrentFlacWriter()
{
lock (flacLock)
{
if (flacWriter == null)
{
return;
}
flacWriter.EndStream();
flacStream.Close();
File.Move(
flacFilePath,
FileNaming.RemoveInProgressSuffix(flacFilePath));
flacFilePath = null;
flacStream = null;
flacWriter = null;
}
}
/** Creates a FlacWriter object if none currently exists. */
private void MaybeCreateFlacWriter()
{
if (flacWriter != null)
{
return;
}
flacFilePath = flacFilePath = FileNaming.AddInProgressSuffix(
FileNaming.GetMicWavInFilePath(dataDir));
flacStream = File.Create(flacFilePath);
flacWriter = new FlacWriter(flacStream);
FlacStreaminfo streamInfo = new()
{
ChannelsCount = AUDIO_NUM_CHANNELS,
BitsPerSample = AUDIO_BITS_PER_SAMPLE,
SampleRate = AUDIO_SAMPLE_RATE_HZ,
MaxBlockSize = AUDIO_SAMPLE_RATE_HZ,
};
flacWriter.StartStream(streamInfo);
}