private async Task WriteBytesToFileAsync(IStorageFile file, byte[] bytes)
{
#if DEBUG
System.Diagnostics.Debug.WriteLine("WRITE: " + file.Name);
#endif
IStorageFile tmpFile = await this.GetTmpFile();
#if DEBUG
System.Diagnostics.Debug.WriteLine("TEMP FILE: " + tmpFile.Name);
#endif
using (IRandomAccessStream stream = await tmpFile.OpenAsync(FileAccessMode.ReadWrite))
{
using (IOutputStream outputStream = stream.GetOutputStreamAt(0L))
{
using (DataWriter writer = new DataWriter(outputStream))
{
writer.WriteBytes(bytes);
await writer.StoreAsync();
writer.DetachStream();
await outputStream.FlushAsync();
await tmpFile.MoveAndReplaceAsync(file);
}
}
}
//// allows all file handles to be released immediately
//// instead of a delay to the next garbage collection
//writer = null;
//outputStream = null;
//stream = null;
//tmpFile = null;
//GC.Collect();
//GC.WaitForPendingFinalizers();
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start)
{
try
{
Debug.WriteLine("Running: " + download.Guid);
// Store the download so we can pause/resume.
activeDownloads.Add(download);
Progress <DownloadOperation> progressCallback = new Progress <DownloadOperation>(DownloadProgress);
if (start) // Start the download and attach a progress handler.
{
await download.StartAsync().AsTask(cts.Token, progressCallback);
}
else // The download was already running when the application started, re-attach the progress handler.
{
await download.AttachAsync().AsTask(cts.Token, progressCallback);
}
ResponseInformation response = download.GetResponseInformation();
Debug.WriteLine(String.Format(CultureInfo.CurrentCulture, "Completed: {0}, Status Code: {1}", download.Guid, response.StatusCode));
// Move the downloaded file from Temporary folder to the selected folder
if (StorageFileDictionary.ContainsKey(download.ResultFile.Name))
{
StorageFile file_selectedLocation = StorageFileDictionary[download.ResultFile.Name];
// convert item to mp3 first
if (IsMusicDictionary[download.ResultFile.Name])
{
Debug.WriteLine("Converting video to mp3: " + download.Guid);
// Others in [File]
string OriginalFileName = download.ResultFile.Name;
AudioEncodingQuality audioQuality = AudioQualityDictionary[download.ResultFile.Name];
bool ism4a = IsisM4ADictionary[download.ResultFile.Name];
IStorageFile result = null;
VideoMP3Transcoder extractor = new VideoMP3Transcoder(OriginalFileName, download.ResultFile, audioQuality, ism4a);
result = await Task.Run(async() =>
await extractor.ConvertToMP3()
);
Debug.WriteLine("Result: " + result != null);
try
{
await result.MoveAndReplaceAsync(file_selectedLocation);
}
catch (Exception e)
{
Debug.WriteLine(e.Message.ToString());
}
if (result != null)
{
Debug.WriteLine("Done converting to mp3: " + download.Guid);
}
else
{
Debug.WriteLine("Error converting to mp3: " + download.Guid);
}
}
else
{
await download.ResultFile.MoveAndReplaceAsync(StorageFileDictionary[download.ResultFile.Name]);
}
}
}
catch (TaskCanceledException)
{
Debug.WriteLine("Canceled: " + download.Guid);
}
catch (Exception ex)
{
if (!IsExceptionHandled("Execution error", ex, download))
{
throw;
}
}
finally
{
activeDownloads.Remove(download);
// Event calling for status msg
DownloadStatusMessageChanged?.Invoke("Download complete", download.ResultFile.Name);
}
}