private IEnumerator ExtractFrameCoroutine(Texture2D target, ProcessExtractedFrame callback, double timeSeconds = -1.0, bool accurateSeek = true, int timeoutMs = 1000, int timeThresholdMs = 100)
{
#if (!UNITY_EDITOR && UNITY_ANDROID) || UNITY_STANDALONE_WIN || UNITY_EDITOR_WIN || UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX || UNITY_IOS || UNITY_TVOS
Texture2D result = target;
Texture frame = null;
if (_controlInterface != null)
{
if (timeSeconds >= 0f)
{
Pause();
// If the right frame is already available (or close enough) just grab it
if (TextureProducer.GetTexture() != null && (System.Math.Abs(_controlInterface.GetCurrentTime() - timeSeconds) < (timeThresholdMs / 1000.0)))
{
frame = TextureProducer.GetTexture();
}
else
{
int preSeekFrameCount = _textureInterface.GetTextureFrameCount();
// Seek to the frame
if (accurateSeek)
{
_controlInterface.Seek(timeSeconds);
}
else
{
_controlInterface.SeekFast(timeSeconds);
}
// Wait for the new frame to arrive
if (!_controlInterface.WaitForNextFrame(GetDummyCamera(), preSeekFrameCount))
{
// If WaitForNextFrame fails (e.g. in android single threaded), we run the below code to asynchronously wait for the frame
int currFc = TextureProducer.GetTextureFrameCount();
int iterations = 0;
int maxIterations = 50;
//+1 as often there will be an extra frame produced after pause (so we need to wait for the second frame instead)
while ((currFc + 1) >= TextureProducer.GetTextureFrameCount() && iterations++ < maxIterations)
{
yield return(null);
}
}
frame = TextureProducer.GetTexture();
}
}
else
{
frame = TextureProducer.GetTexture();
}
}
if (frame != null)
{
result = Helper.GetReadableTexture(frame, TextureProducer.RequiresVerticalFlip(), Helper.GetOrientation(Info.GetTextureTransform()), target);
}
#else
Texture2D result = ExtractFrame(target, timeSeconds, accurateSeek, timeoutMs, timeThresholdMs);
#endif
callback(result);
yield return(null);
}
public void ExtractFrameAsync(Texture2D target, ProcessExtractedFrame callback, double timeSeconds = -1.0, bool accurateSeek = true, int timeoutMs = 1000, int timeThresholdMs = 100)
{
StartCoroutine(ExtractFrameCoroutine(target, callback, timeSeconds, accurateSeek, timeoutMs, timeThresholdMs));
}
