public void Render(IAudioOutput input, IAudioOutput output)
{
if (!Process(input, output))
{
AudioHelpers.CopySample(input.Sample, output.Sample, true);
}
}
protected override void Render(IList <IAudioOutput> inputs)
{
if (inputs.Count != 1)
{
throw new ArgumentException("Incorrect number of inputs.");
}
if (!Process(inputs.First(), Output))
{
AudioHelpers.CopySample(inputs.First().Sample, Output.Sample, true);
}
}
public override bool Process()
{
var stats = Player.Stats.Details;
if (stats == null)
{
return(false);
}
if (stats.ActualSourceVideoIntervalUsec < 1e-8)
{
return(false); // audio only - no need to reclock
}
var refclk = stats.RefClockDeviation;
if (refclk > 10 || refclk < -10) // no data
{
return(false);
}
const int oneSecond = 1000000;
var videoHz = oneSecond / stats.ActualSourceVideoIntervalUsec;
var displayHz = oneSecond / stats.DisplayRefreshIntervalUsec;
var ratio = displayHz / videoHz;
if (ratio > (100 + MAX_PERCENT_ADJUST) / 100 || ratio < (100 - MAX_PERCENT_ADJUST) / 100)
{
return(false);
}
var input = Audio.Input;
var output = Audio.Output;
// passthrough from input to output
AudioHelpers.CopySample(input, output, true);
// Use of 0.999999 is to allow a tiny amount of measurement error in displayHz
// This allows us to adjust refclk to just a fraction under the displayHz
var adjust = ratio * (0.999999 - refclk);
long start, end;
output.GetTime(out start, out end);
long endDelta = end - start;
start = (long)(start * adjust);
output.SetTime(start, endDelta);
return(true);
}
protected override bool Process(IAudioOutput input, IAudioOutput output)
{
if (!CalculateRatio(input))
{
m_SampleIndex = -8 * RATIO_ADJUST_INTERVAL;
m_Ratio = 1;
return(false);
}
// Passthrough from input to output
AudioHelpers.CopySample(input.Sample, output.Sample, true);
PerformReclock(output);
return(true);
}
protected sealed override bool Process(IAudioOutput input, IAudioOutput output)
{
if (input.Format.IsBitStreaming())
{
return(false);
}
// WARNING: We assume input and output formats are the same
// passthrough from input to output
AudioHelpers.CopySample(input.Sample, output.Sample, false);
IntPtr samples;
input.Sample.GetPointer(out samples);
var format = input.Format;
var bytesPerSample = format.wBitsPerSample / 8;
var length = input.Sample.GetActualDataLength() / bytesPerSample;
var channels = format.nChannels;
var sampleFormat = format.SampleFormat();
return(Process(input, sampleFormat, samples, channels, length, output.Sample));
}
protected override void OutputResult(IAudioOutput result)
{
AudioHelpers.CopySample(result.Sample, m_Audio.Output, true);
}