public static unsafe byte[] convertToGrayscale(SoftwareBitmap bitmap, out int width, out int height)
{
width = 0;
height = 0;
byte[] returnArray = null;
//if (pauseDecoder) return returnArray; //this is done in proxy.js
Debug.WriteLine("Active Threads now: " + aThreads);
law_n_order.WaitOne();
if ((aThreads + convertedQueue.Count) < maxThreads) //old: if (aThreads < nThreads && convertedQueue.Count == 0)
{
//aThreads = nThreads; //just test one frame
aThreads++;
//spawn a new thread
BackgroundWorker bWorker = new BackgroundWorker();
bWorker.WorkerReportsProgress = false;
bWorker.WorkerSupportsCancellation = false;
bWorker.DoWork += new DoWorkEventHandler(bWorker_DoWork);
bWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bWorker_RunWorkerCompleted);
bWorker.RunWorkerAsync(bitmap);
}
else
{
//skip this frame
}
if (convertedQueue.Count > 0)
{
conversionResult cResult = convertedQueue.Dequeue();
width = cResult.width;
height = cResult.height;
returnArray = cResult.returnArray;
}
law_n_order.ReleaseMutex();
//special case handling because js doesn't see it as null
if (returnArray == null)
{
returnArray = new byte[1] {
0
};
}
return(returnArray);
}
public static MWResult decodeFrame([ReadOnlyArray()] byte[] returnArray, int width, int height)//, out MWResult mwResult)
{
MWResult mwResult = null;
if (returnArray == null)
{
return(mwResult);
}
//Debug.WriteLine("In DecodeFrame: " + ("\n\taThreads: ") + aThreads + "\tconv_count: " + convertedQueue.Count); //tconv_count always 0, thats why
law_n_order.WaitOne();
if (aThreads < maxThreads) //rm && convertedQueue.Count > 0 thaaank you
{
aThreads++;
conversionResult cData = new conversionResult();
cData.width = width;
cData.height = height;
cData.returnArray = returnArray;
//spawn a new thread
BackgroundWorker bWorkerX = new BackgroundWorker();
bWorkerX.WorkerReportsProgress = false;
bWorkerX.WorkerSupportsCancellation = false;
bWorkerX.DoWork += new DoWorkEventHandler(bWorkerX_DoWork);
bWorkerX.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bWorkerX_RunWorkerCompleted);
bWorkerX.RunWorkerAsync(cData);
}
if (decodedQueue.Count > 0)
{
mwResult = decodedQueue.Dequeue();
//reset/clear up
iniClear();
//Debug.WriteLine("found it!");
}
law_n_order.ReleaseMutex();
return(mwResult);
}
private static unsafe void bWorker_DoWork(object sender, DoWorkEventArgs e)
{
byte *data = null;
uint capacity = 0;
SoftwareBitmap bitmap = e.Argument as SoftwareBitmap; //could check for null
int width = 0;
int height = 0;
byte[] returnArray = null;
// Effect is hard-coded to operate on BGRA8 format only
if (bitmap.BitmapPixelFormat == BitmapPixelFormat.Bgra8 || bitmap.BitmapPixelFormat == BitmapPixelFormat.Nv12 ||
bitmap.BitmapPixelFormat == BitmapPixelFormat.Yuy2 || bitmap.BitmapPixelFormat == BitmapPixelFormat.Gray8)
{
// In BGRA8 format, each pixel is defined by 4 bytes
int BYTES_PER_PIXEL = 4;
using (var buffer = bitmap.LockBuffer(BitmapBufferAccessMode.ReadWrite))
using (IMemoryBufferReference reference = buffer.CreateReference())
{
if (reference is IMemoryBufferByteAccess)
{
// Get a pointer to the pixel buffer
((IMemoryBufferByteAccess)reference).GetBuffer(out data, out capacity);
var desc = buffer.GetPlaneDescription(0);
width = desc.Width;
height = desc.Height;
returnArray = new byte[desc.Width * desc.Height];
if (bitmap.BitmapPixelFormat == BitmapPixelFormat.Yuy2)
{
int length = desc.Width * desc.Height;
for (int i = 0; i < length; i++)
{
returnArray[i] = data[i << 1];
}
}
else
if (bitmap.BitmapPixelFormat == BitmapPixelFormat.Nv12 || bitmap.BitmapPixelFormat == BitmapPixelFormat.Gray8)
{
Marshal.Copy((IntPtr)data, returnArray, 0, desc.Width * desc.Height);
}
else
if (bitmap.BitmapPixelFormat == BitmapPixelFormat.Bgra8)
{
BYTES_PER_PIXEL = 4;
// Get information about the BitmapBuffer
// Iterate over all pixels
width = desc.Width;
height = desc.Height;
for (uint row = 0; row < desc.Height; row++)
{
for (uint col = 0; col < desc.Width; col++)
{
// Index of the current pixel in the buffer (defined by the next 4 bytes, BGRA8)
var currPixel = desc.StartIndex + desc.Stride * row + BYTES_PER_PIXEL * col;
// Read the current pixel information into b,g,r channels (leave out alpha channel)
var b = data[currPixel + 0]; // Blue
var g = data[currPixel + 1]; // Green
var r = data[currPixel + 2]; // Red
int y = (r * 77) + (g * 151) + (b * 28) >> 8;
/*
* data[currPixel + 0] = (byte)y;
* data[currPixel + 1] = (byte)y;
* data[currPixel + 2] = (byte)y;
*/
returnArray[row * desc.Width + col] = (byte)y;
}
}
}
}
}
}
conversionResult cResult = new conversionResult();
cResult.width = width;
cResult.height = height;
cResult.returnArray = returnArray;
law_n_order.WaitOne();
convertedQueue.Enqueue(cResult);
law_n_order.ReleaseMutex();
//throw new NotImplementedException();
}