async Task ProcessYouTubeUrlAsync()
{
VideoMetaData = null;
AudioOnlyStreamInfos = Array.Empty <AudioOnlyStreamInfo>();
CheckedAudioOnlyStreamInfoHashCode = NoSelection;
ProcessYouTubeUrlButtonEnabled = false;
DownloadButtonEnabled = false;
Progress = 0;
OpusAudioStreamPresent = false;
ExtractOpus = false;
try
{
var taskVideoMetaData = YouTubeDownloadApi.GetVideoMetaDataAsync(YouTubeUrl);
var taskAudioOnlyStreamInfos = YouTubeDownloadApi.GetAudioOnlyStreamsAsync(YouTubeUrl);
await Task.WhenAll(taskVideoMetaData, taskAudioOnlyStreamInfos);
VideoMetaData = await taskVideoMetaData;
AudioOnlyStreamInfos = await taskAudioOnlyStreamInfos;
var highest = AudioOnlyStreamInfos.TryGetWithHighestBitrate();
CheckedAudioOnlyStreamInfoHashCode = highest?.GetHashCode() ?? NoSelection;
OpusAudioStreamPresent = AudioOnlyStreamInfos.Any(a => a.IsOpus());
ExtractOpus = OpusAudioStreamPresent;
}
finally
{
DownloadButtonEnabled = true;
ProcessYouTubeUrlButtonEnabled = true;
}
}
async Task DownloadFileAsync()
{
if (CheckedAudioOnlyStreamInfoHashCode == NoSelection)
{
return;
}
Progress = 0;
DownloadButtonEnabled = false;
try
{
var streamInfo = AudioOnlyStreamInfos.Single(x => x.GetHashCode() == CheckedAudioOnlyStreamInfoHashCode);
var x = new Stopwatch();
x.Reset();
x.Start();
// bool oggOpusIsExtractedByServer = false;
Stream stream;
if (streamInfo.IsOpus() && ExtractOpus)
{
stream = await YouTubeDownloadApi.GetOggOpusAudioStreamAsync(streamInfo);
// oggOpusIsExtractedByServer = true;
x.Stop();
Console.WriteLine("GetOggOpusAudioStreamAsync = " + x.Elapsed);
}
else
{
stream = await YouTubeDownloadApi.GetAudioStreamAsync(streamInfo);
x.Stop();
Console.WriteLine("GetAudioStreamAsync = " + x.Elapsed);
}
var filename = GetFileNameWithExtension(streamInfo);
x.Reset();
x.Start();
using var memoryStream = new MemoryStream();
long lastValue = 0;
await stream.CopyToAsync(memoryStream, async (e) =>
{
Progress = 100 * e.TotalBytesRead / e.SourceLength;
if (Progress != lastValue)
{
lastValue = Progress;
StateHasChanged();
await Task.Delay(5); // give the UI some time to catch up
}
});
x.Stop();
Console.WriteLine("CopyToAsync = " + x.Elapsed);
//byte[] array;
//if (OpusAudioStreamPresent && ExtractOpus && !oggOpusIsExtractedByServer)
//{
// using var opusStream = new MemoryStream();
// x.Start();
// memoryStream.Position = 0;
// MatroskaDemuxer.ExtractOggOpusAudio(memoryStream, opusStream);
// Console.WriteLine("ExtractOggOpusAudio and ToArray = " + x.Elapsed);
// array = opusStream.ToArray();
// x.Stop();
//}
//else
//{
// x.Start();
// array = memoryStream.ToArray();
// x.Stop();
// Console.WriteLine("ToArray = " + x.Elapsed);
//}
x.Reset();
x.Start();
byte[] array = memoryStream.ToArray();
x.Stop();
Console.WriteLine("ToArray = " + x.Elapsed);
x.Reset();
x.Start();
await BlazorDownloadFileService.DownloadFileAsync(filename, array);
x.Stop();
Console.WriteLine("Download = " + x.Elapsed);
}
finally
{
DownloadButtonEnabled = true;
}
}
