/// <summary>
/// Creates a clip by mixing the specified clips.
/// </summary>
public HapticsClip(HapticsClip a, HapticsClip b)
{
var maxCount = a.Count;
if (b.Count > maxCount)
{
maxCount = b.Count;
}
Capacity = maxCount;
Samples = new byte[Capacity * Haptics.HapticsConfig.SampleSizeInBytes];
for (var i = 0; i < a.Count || i < b.Count; i++)
{
if (Haptics.HapticsConfig.SampleSizeInBytes == 1)
{
byte sample = 0; // TODO support multi-byte samples
if ((i < a.Count) && (i < b.Count))
{
var v = a.Samples[i] + b.Samples[i];
sample = (byte)(v <0 ? 0 : v> byte.MaxValue ? byte.MaxValue : v); // TODO support multi-byte samples
}
else if (i < a.Count)
{
sample = a.Samples[i]; // TODO support multi-byte samples
}
else if (i < b.Count)
{
sample = b.Samples[i]; // TODO support multi-byte samples
}
WriteSample(sample); // TODO support multi-byte samples
}
}
}
public ClipPlaybackTracker(HapticsClip clip)
{
Clip = clip;
}
/// <summary>
/// Adds the samples from the specified clip to the ones in the currently-playing clip(s).
/// </summary>
public void Mix(HapticsClip clip)
{
var numClipsToMix = 0;
var numSamplesToMix = 0;
var numSamplesRemaining = clip.Count;
while (numSamplesRemaining > 0 && numClipsToMix < m_pendingClips.Count)
{
var numSamplesRemainingInClip = m_pendingClips[numClipsToMix].Clip.Count - m_pendingClips[numClipsToMix].ReadCount;
numSamplesRemaining -= numSamplesRemainingInClip;
numSamplesToMix += numSamplesRemainingInClip;
numClipsToMix++;
}
if (numSamplesRemaining > 0)
{
numSamplesToMix += numSamplesRemaining;
numSamplesRemaining = 0;
}
if (numClipsToMix > 0)
{
var mixClip = new HapticsClip(numSamplesToMix);
var a = clip;
var aReadCount = 0;
for (var i = 0; i < numClipsToMix; i++)
{
var b = m_pendingClips[i].Clip;
for (var bReadCount = m_pendingClips[i].ReadCount; bReadCount < b.Count; bReadCount++)
{
if (HapticsConfig.SampleSizeInBytes == 1)
{
byte sample = 0; // TODO support multi-byte samples
if ((aReadCount < a.Count) && (bReadCount < b.Count))
{
var v = a.Samples[aReadCount] + b.Samples[bReadCount];
sample = (byte)(v <0 ? 0 : v> byte.MaxValue ? byte.MaxValue : v); // TODO support multi-byte samples
aReadCount++;
}
else if (bReadCount < b.Count)
{
sample = b.Samples[bReadCount]; // TODO support multi-byte samples
}
mixClip.WriteSample(sample); // TODO support multi-byte samples
}
}
}
while (aReadCount < a.Count)
{
if (HapticsConfig.SampleSizeInBytes == 1)
{
mixClip.WriteSample(a.Samples[aReadCount]); // TODO support multi-byte samples
}
aReadCount++;
}
m_pendingClips[0] = new ClipPlaybackTracker(mixClip);
for (var i = 1; i < numClipsToMix; i++)
{
m_pendingClips.RemoveAt(1);
}
}
else
{
m_pendingClips.Add(new ClipPlaybackTracker(clip));
}
}
/// <summary>
/// Enqueues the specified clip to play after any currently-playing clip finishes.
/// </summary>
public void Queue(HapticsClip clip)
{
m_pendingClips.Add(new ClipPlaybackTracker(clip));
}
/// <summary>
/// Immediately plays the specified clip without waiting for any currently-playing clip to finish.
/// </summary>
public void Preempt(HapticsClip clip)
{
m_pendingClips.Clear();
m_pendingClips.Add(new ClipPlaybackTracker(clip));
}