/// <summary>
/// Accepts Base64 data encoded as a char array and writes it to the binary stream.
/// </summary>
/// <param name="buffer">Array of char representing the base64 data</param>
/// <param name="offset">Zero based element position to start encoding</param>
/// <param name="count">The Number of chars to decode</param>
/// <returns>The number of bytes consumed by the conversion (which may not be the whole array)</returns>
public async Task <int> Write(char[] buffer, int offset, int count)
{
// must write in multiples of 4. We need to add any unwritten buffer to the front
var charsToWrite = 4 * ((int)((count + unwritten.Length) / 4));
var newChars = new char[charsToWrite];
var newDataStartPoint = unwritten.Length;
var newCount = charsToWrite - unwritten.Length;
if (unwritten.Length > 0)
{
Array.Copy(unwritten.ToCharArray(), 0, newChars, 0, unwritten.Length);
}
;
Array.Copy(buffer, 0, newChars, newDataStartPoint, newCount);
var newBytes = Convert.FromBase64CharArray(newChars, 0, charsToWrite);
//keep the unwritten part for next time.
var unwrittenSize = (count - newCount);
if (unwrittenSize > 0)
{
unwritten = new string(buffer, count - unwrittenSize, unwrittenSize);
}
if (!Ignore)
{
await OutStream.WriteAsync(newBytes, 0, newBytes.Length);
}
return(charsToWrite);
}
public Task WriteAsync(int value, CancellationToken cancellationToken)
{
byte[] buffer = Buffer;
buffer[0] = (byte)value;
buffer[1] = (byte)(value >> 8);
buffer[2] = (byte)(value >> 16);
buffer[3] = (byte)(value >> 24);
return(OutStream.WriteAsync(buffer, 0, 4, cancellationToken));
}
public Task WriteAsync(long value, CancellationToken cancellationToken)
{
byte[] buffer = Buffer;
buffer[0] = (byte)value;
buffer[1] = (byte)(value >> 8);
buffer[2] = (byte)(value >> 16);
buffer[3] = (byte)(value >> 24);
buffer[4] = (byte)(value >> 32);
buffer[5] = (byte)(value >> 40);
buffer[6] = (byte)(value >> 48);
buffer[7] = (byte)(value >> 56);
return(OutStream.WriteAsync(buffer, 0, 8, cancellationToken));
}
/// <summary>
/// Accepts Base64 String data converts it to the binary stream
/// </summary>
/// <param name="text">A Snippet of Base64 text to be written to the stream</param>
/// <returns>The number of characters consumed by the conversion (which may NOT be the whole string)</returns>
public async Task <int> WriteString(string text)
{
var textToWrite = unwritten + text;
var charsToWrite = 4 * ((int)(textToWrite.Length / 4));
var newChars = Convert.FromBase64String(textToWrite.Substring(0, charsToWrite));
unwritten = (charsToWrite < textToWrite.Length) ? textToWrite.Substring(charsToWrite) : "";
if (!Ignore)
{
await OutStream.WriteAsync(newChars, 0, newChars.Length);
}
return(charsToWrite);
}
protected virtual async Task WriteHeaderAsync(string name, DateTime lastModificationTime, long count,
string userName, string groupName, int mode)
{
var tarHeader = new UsTarHeader()
{
FileName = name,
LastModification = lastModificationTime,
SizeInBytes = count,
UserId = userName.GetHashCode(),
UserName = userName,
GroupId = groupName.GetHashCode(),
GroupName = groupName,
Mode = mode
};
await OutStream.WriteAsync(tarHeader.GetHeaderValue(), 0, tarHeader.HeaderSize);
}
protected override async Task WriteHeaderAsync(string name, DateTime lastModificationTime,
long count, int userId, int groupId, int mode, EntryType entryType)
{
var tarHeader = new UsTarHeader()
{
FileName = name,
LastModification = lastModificationTime,
SizeInBytes = count,
UserId = userId,
UserName = Convert.ToString(userId, 8),
GroupId = groupId,
GroupName = Convert.ToString(groupId, 8),
Mode = mode,
EntryType = entryType
};
await OutStream.WriteAsync(tarHeader.GetHeaderValue(), 0, tarHeader.HeaderSize);
}
/// <summary>
/// Start service loop.
/// </summary>
private async Task StartAsyncSend()
{
Running = true;
while (Running)
{
if (OutStream == null || !OutStream.CanWrite)
{
Thread.Sleep(100);
continue;
}
try
{
if (AudioQueue.Count > 0)
{
byte[] mixed = new byte[AudioHelpers.BUFFER_SIZE * AudioHelpers.CHANNEL_COUNT];
for (int i = 0; i < AudioHelpers.FRAME_SAMPLES; ++i)
{
int sample = 0;
foreach (var audioPair in AudioQueue)
{
var session = audioPair.Value;
if (session.State == ReproductionState.Paused)
{
continue;
}
if (session.State == ReproductionState.Stopped)
{
session.CloseReproduction();
}
if (session.State == ReproductionState.Closed || session.EndOfStream)
{
AudioQueue.TryRemove(audioPair.Key, out var e);
continue;
}
double volume = Math.Max(Math.Min((session.Source?.Volume ?? DefaultAudioSource.Instance.Volume) / 100, 1), 0);
double gain = (session.Source?.Gain ?? DefaultAudioSource.Instance.Gain) + 1;
byte[] buffer = new byte[AudioHelpers.SAMPLE_SIZE];
if (session.Read(buffer, 0, AudioHelpers.SAMPLE_SIZE) > 0)
{
sample += (Int32)(AudioHelpers.GetInt16(buffer, 0, true) * volume * gain);
}
}
short sampleValue = (short)Math.Min(Math.Max(short.MinValue, sample), short.MaxValue);
AudioHelpers.GetBytes(sampleValue, mixed, i * AudioHelpers.SAMPLE_SIZE, true);
}
// Send the buffer to Discord
await OutStream.WriteAsync(mixed, 0, AudioHelpers.FRAME_SAMPLES *AudioHelpers.CHANNEL_COUNT);
}
else
{
// Flush stream
await OutStream.FlushAsync();
Thread.Sleep(100);
}
}
catch (Exception e)
{
}
}
await Task.CompletedTask;
}
public void Start()
{
Stop();
Running = true;
_cancellationTokenSource = new CancellationTokenSource();
ReadFinished = false;
_readTask = Task.Run(async() =>
{
while (Running && _cancellationTokenSource?.IsCancellationRequested == false)
{
try
{
if (InStream.CanRead)
{
AudioChunk chunk = new AudioChunk(BufferReadSize);
int bytesRead = await InStream.ReadAsync(chunk.Memory, _cancellationTokenSource.Token).ConfigureAwait(false);
if (bytesRead > 0)
{
chunk.Length = bytesRead;
// Wait for the dequeue, comparing in megabytes.
while (Running && (Queue.Count * (BufferReadSize * 0.000001)) > BufferLimit)
{
await Task.Delay(100, _cancellationTokenSource?.Token ?? CancellationToken.None).ConfigureAwait(false);
}
Queue.Enqueue(chunk);
}
else
{
Log.Debug("AudioBuffer: Read EOF");
break;
}
}
else
{
Log.Error("AudioBuffer: Could not read InStream.");
await Task.Delay(25).ConfigureAwait(false);
}
}
catch (OperationCanceledException)
{
return;
}
catch (Exception ex)
{
Log.Error($"AudioBuffer | {ex}");
}
}
ReadFinished = true;
}, _cancellationTokenSource.Token);
_writeTask = Task.Run(async() =>
{
while (Running && _cancellationTokenSource?.IsCancellationRequested == false)
{
if (ReadFinished && Queue.IsEmpty)
{
break;
}
try
{
if (Queue.TryDequeue(out var audioChunk))
{
using (audioChunk)
{
if (OutStream.CanWrite)
{
// We're required to process the chunks in the write task, it's far slower which allows us to change the volume while it's still playing.
if (ProcessBuffer != null)
{
var bytes = audioChunk.Memory;
if (audioChunk.Length != audioChunk.Memory.Length)
{
bytes = audioChunk.Memory.Part(0, audioChunk.Length, false).ToArray();
}
var processedBytes = ProcessBuffer?.Invoke(bytes);
processedBytes.CopyTo(audioChunk.Memory, 0);
audioChunk.Length = processedBytes.Length;
}
await OutStream.WriteAsync(audioChunk.Memory, 0, audioChunk.Length, _cancellationTokenSource.Token);
}
else
{
Log.Error("AudioBuffer: Could not write to OutStream.");
await Task.Delay(25).ConfigureAwait(false);
}
}
}
}
catch (OperationCanceledException)
{
return;
}
catch (Exception ex)
{
Log.Error($"AudioBuffer | {ex.Message}");
Log.Debug($"AudioBuffer | {ex}");
await Task.Delay(25).ConfigureAwait(false);
}
}
}, _cancellationTokenSource.Token);
}
public Task WriteAsync(byte[] buffer, int index, int count, CancellationToken cancellationToken)
{
return(OutStream.WriteAsync(buffer, index, count, cancellationToken));
}
public Task WriteAsync(byte[] buffer, CancellationToken cancellationToken)
{
return(OutStream.WriteAsync(buffer, 0, buffer.Length, cancellationToken));
}
public Task WriteAsync(byte value, CancellationToken cancellationToken)
{
Debug.Assert(value <= 18);
return(OutStream.WriteAsync(ByteValueBuffer, value, 1, cancellationToken));
}
public Task WriteAsync(bool value, CancellationToken cancellationToken)
{
return(OutStream.WriteAsync(ByteValueBuffer, value ? 1 : 0, 1, cancellationToken));
}