/// <summary>
/// Pull from all our input pins, then combine, then subtract
/// </summary>
/// <param name="tsElapsed"></param>
void DoPushPull(TimeSpan tsElapsed)
{
lock (PushPullLock)
{
PushPullObject[] members = null;
lock (MemberLock)
{
members = Members.ToArray();
}
if (members.Length <= 0)
{
return;
}
Dictionary <IAudioSource, short[]> InputSamples = new Dictionary <IAudioSource, short[]>();
/// Convert our short data to int so we don't during addition
// int[] combinedint = Utils.MakeIntArrayFromShortArray(sInitialData);
int[] combinedint = new int[AudioFormat.CalculateNumberOfSamplesForDuration(tsElapsed)];
///Sum the input data from all our input sources, storing the data for each source so we can subtract it when sending
foreach (PushPullObject nextobj in members)
{
if (nextobj.AudioSource == null)
{
continue;
}
// Always pull data from a source even if it's not active, because some just queue their buffers
MediaSample sample = nextobj.AudioSource.PullSample(AudioFormat, tsElapsed);
if (sample == null)
{
continue;
}
if (nextobj.AudioSource.IsSourceActive == false)
{
continue;
}
short[] sData = sample.GetShortData();
/// Amplify our data if told to
if (nextobj.AudioSource.SourceAmplitudeMultiplier != 1.0f)
{
for (int i = 0; i < sData.Length; i++)
{
sData[i] = (short)(nextobj.AudioSource.SourceAmplitudeMultiplier * sData[i]);
}
}
InputSamples.Add(nextobj.AudioSource, sData);
Utils.SumArrays(combinedint, sData);
}
/// Push data to all our output filters, subtracting the data this member supplied
foreach (PushPullObject nextobj in members)
{
if (nextobj.AudioSink == null)
{
continue;
}
if (nextobj.AudioSink.IsSinkActive == false)
{
continue;
}
/// copy the summed data so we don't mangle it for the next client
int[] nCopy = new int[combinedint.Length];
Array.Copy(combinedint, nCopy, nCopy.Length);
foreach (IAudioSource excludesource in nextobj.SourceExcludeList)
{
if (InputSamples.ContainsKey(excludesource) == true) // If we are in the dictionary, we are not muted, so no need to subtract
{
short[] sData = InputSamples[excludesource];
Utils.SubtractArray(nCopy, sData);
}
}
/// Amplify our data if told to
if (nextobj.AudioSink.SinkAmplitudeMultiplier != 1.0f)
{
for (int i = 0; i < nCopy.Length; i++)
{
nCopy[i] = (int)(nextobj.AudioSink.SinkAmplitudeMultiplier * nCopy[i]);
}
}
//short[] sOutput = Utils.MakeShortArrayFromIntArray(nCopy);
short[] sOutput = Utils.AGCAndShortArray(nCopy, short.MaxValue);
MediaSample outputsample = new MediaSample(sOutput, AudioFormat);
nextobj.AudioSink.PushSample(outputsample, this);
}
}
}
