/// <summary>
/// Renders the specified media block.
/// </summary>
/// <param name="mediaBlock">The media block.</param>
/// <param name="clockPosition">The clock position.</param>
public void Render(MediaBlock mediaBlock, TimeSpan clockPosition)
{
// We don't need to render anything while we are seeking. Simply drop the blocks.
lock (SyncLock)
{
if (MediaCore.State.IsSeeking)
{
return;
}
if (AudioBuffer == null)
{
return;
}
// Capture Media Block Reference
if (mediaBlock is AudioBlock == false)
{
return;
}
var audioBlock = mediaBlock as AudioBlock;
if (audioBlock == null)
{
return;
}
var audioBlocks = MediaCore.Blocks[MediaType.Audio];
while (audioBlock != null)
{
if (audioBlock.TryAcquireReaderLock(out var readLock) == false)
{
return;
}
using (readLock)
{
// Write the block if we have to, avoiding repeated blocks.
if (AudioBuffer.WriteTag < audioBlock.StartTime)
{
MediaElement.RaiseRenderingAudioEvent(audioBlock, clockPosition);
AudioBuffer.Write(audioBlock.Buffer, audioBlock.SamplesBufferLength, audioBlock.StartTime, true);
}
// Stop adding if we have too much in there.
if (AudioBuffer.CapacityPercent >= 0.8)
{
break;
}
// Retrieve the following block
audioBlock = audioBlocks.Next(audioBlock) as AudioBlock;
}
}
}
}
/// <summary>
/// Renders the specified media block.
/// </summary>
/// <param name="mediaBlock">The media block.</param>
/// <param name="clockPosition">The clock position.</param>
public void Render(MediaBlock mediaBlock, TimeSpan clockPosition)
{
// We don't need to render anything while we are seeking. Simply drop the blocks.
if (MediaElement.IsSeeking)
{
return;
}
// Update the speedratio
SpeedRatio = MediaElement?.Clock?.SpeedRatio ?? 0d;
if (AudioBuffer == null)
{
return;
}
var block = mediaBlock as AudioBlock;
if (block == null)
{
return;
}
var audioBlocks = MediaElement.Blocks[MediaType.Audio];
var audioBlock = mediaBlock as AudioBlock;
while (audioBlock != null)
{
// Write the block if we have to, avoiding repeated blocks.
if (AudioBuffer.WriteTag < audioBlock.StartTime)
{
MediaElement.RaiseRenderingAudioEvent(audioBlock, clockPosition);
AudioBuffer.Write(audioBlock.Buffer, audioBlock.BufferLength, audioBlock.StartTime, true);
}
// Stop adding if we have too much in there.
if (AudioBuffer.CapacityPercent >= 0.8)
{
break;
}
// Retrieve the following block
audioBlock = audioBlocks.Next(audioBlock) as AudioBlock;
}
}
/// <inheritdoc />
public int Read(byte[] targetBuffer, int targetBufferOffset, int requestedBytes)
{
// We sync-lock the reads to avoid null reference exceptions as destroy might have been called
var lockTaken = false;
Monitor.TryEnter(SyncLock, SyncLockTimeout, ref lockTaken);
if (lockTaken == false || HasFiredAudioDeviceStopped)
{
Array.Clear(targetBuffer, targetBufferOffset, requestedBytes);
return(requestedBytes);
}
try
{
WaitForReadyEvent.Complete();
var speedRatio = MediaCore.State.SpeedRatio;
// Render silence if we don't need to output samples
if (MediaCore.State.IsPlaying == false || speedRatio <= 0d || MediaCore.State.HasAudio == false || AudioBuffer.ReadableCount <= 0)
{
Array.Clear(targetBuffer, targetBufferOffset, requestedBytes);
return(requestedBytes);
}
// Ensure a pre-allocated ReadBuffer
if (ReadBuffer == null || ReadBuffer.Length < Convert.ToInt32(requestedBytes * Constants.Controller.MaxSpeedRatio))
{
ReadBuffer = new byte[Convert.ToInt32(requestedBytes * Constants.Controller.MaxSpeedRatio)];
}
// First part of DSP: Perform AV Synchronization if needed
if (MediaCore.State.HasVideo && Synchronize(targetBuffer, targetBufferOffset, requestedBytes, speedRatio) == false)
{
return(requestedBytes);
}
var startPosition = Position;
// Perform DSP
if (speedRatio < 1.0)
{
if (AudioProcessor != null)
{
ReadAndUseAudioProcessor(requestedBytes, speedRatio);
}
else
{
ReadAndSlowDown(requestedBytes, speedRatio);
}
}
else if (speedRatio > 1.0)
{
if (AudioProcessor != null)
{
ReadAndUseAudioProcessor(requestedBytes, speedRatio);
}
else
{
ReadAndSpeedUp(requestedBytes, true, speedRatio);
}
}
else
{
if (requestedBytes > AudioBuffer.ReadableCount)
{
Array.Clear(targetBuffer, targetBufferOffset, requestedBytes);
return(requestedBytes);
}
AudioBuffer.Read(requestedBytes, ReadBuffer, 0);
}
ApplyVolumeAndBalance(targetBuffer, targetBufferOffset, requestedBytes);
MediaElement.RaiseRenderingAudioEvent(
targetBuffer, requestedBytes, startPosition, WaveFormat.ConvertByteSizeToDuration(requestedBytes));
}
catch (Exception ex)
{
this.LogError(Aspects.AudioRenderer, $"{nameof(AudioRenderer)}.{nameof(Read)} has faulted.", ex);
Array.Clear(targetBuffer, targetBufferOffset, requestedBytes);
}
finally
{
Monitor.Exit(SyncLock);
}
return(requestedBytes);
}
/// <summary>
/// Renders the specified media block.
/// </summary>
/// <param name="mediaBlock">The media block.</param>
/// <param name="clockPosition">The clock position.</param>
public void Render(MediaBlock mediaBlock, TimeSpan clockPosition)
{
// We don't need to render anything while we are seeking. Simply drop the blocks.
if (MediaCore.State.IsSeeking)
{
return;
}
var lockTaken = false;
Monitor.TryEnter(SyncLock, SyncLockTimeout, ref lockTaken);
if (lockTaken == false)
{
return;
}
try
{
if ((AudioDevice?.IsRunning ?? false) == false)
{
// TODO: Handle this? -- see issue #93
return;
}
if (AudioBuffer == null)
{
return;
}
// Capture Media Block Reference
if (mediaBlock is AudioBlock == false)
{
return;
}
var audioBlock = mediaBlock as AudioBlock;
if (audioBlock == null)
{
return;
}
var audioBlocks = MediaCore.Blocks[MediaType.Audio];
while (audioBlock != null)
{
if (audioBlock.TryAcquireReaderLock(out var readLock) == false)
{
return;
}
using (readLock)
{
// Write the block if we have to, avoiding repeated blocks.
if (AudioBuffer.WriteTag < audioBlock.StartTime)
{
MediaElement.RaiseRenderingAudioEvent(audioBlock, clockPosition);
AudioBuffer.Write(audioBlock.Buffer, audioBlock.SamplesBufferLength, audioBlock.StartTime, true);
}
// Stop adding if we have too much in there.
if (AudioBuffer.CapacityPercent >= 0.8)
{
break;
}
// Retrieve the following block
audioBlock = audioBlocks.Next(audioBlock) as AudioBlock;
}
}
}
catch (Exception ex)
{
MediaCore?.Log(MediaLogMessageType.Error,
$"{ex.GetType()} in {nameof(AudioRenderer)}.{nameof(Read)}: {ex.Message}. Stack Trace:\r\n{ex.StackTrace}");
}
finally
{
Monitor.Exit(SyncLock);
}
}