private IEnumerator GetThumbnail (GCHandle thumbnailHandle, Action<Texture2D> callback, VideoDelegate callbackObject) {
yield return new WaitUntil(() => Marshal.ReadIntPtr(thumbnailHandle.AddrOfPinnedObject()) != IntPtr.Zero);
MonoBehaviour.Destroy(callbackObject); // We don't need this anymore
var pixelBuffer = Marshal.ReadIntPtr(thumbnailHandle.AddrOfPinnedObject());
var width = Marshal.ReadInt32(new IntPtr(thumbnailHandle.AddrOfPinnedObject().ToInt32() + sizeof(int)));
var height = Marshal.ReadInt32(new IntPtr(thumbnailHandle.AddrOfPinnedObject().ToInt32() + 2 * sizeof(int)));
var thumbnail = new Texture2D(width, height, TextureFormat.RGBA32, false);
thumbnail.LoadRawTextureData(pixelBuffer, width * height * 4);
thumbnail.Apply();
SharingBridge.FreeThumbnail(thumbnailHandle.AddrOfPinnedObject());
thumbnailHandle.Free();
callback(thumbnail);
}
public void GetThumbnail(string path, Action <Texture2D> callback, float time)
{
IntPtr pixelBuffer = IntPtr.Zero; int width = 0, height = 0;
if (!SharingBridge.GetThumbnail(path, time, ref pixelBuffer, ref width, ref height))
{
Debug.LogError("NatCorder Error: Failed to get thumbnail for video at path: " + path);
callback(null);
}
var thumbnail = new Texture2D(width, height, TextureFormat.BGRA32, false);
thumbnail.LoadRawTextureData(pixelBuffer, width * height * 4);
thumbnail.Apply();
SharingBridge.FreeThumbnail(pixelBuffer);
callback(thumbnail);
}