public void HandleBlock(string type, MLVTypes.mlv_vidf_hdr_t header, byte[] rawData, int rawPos, int rawLength)
{
VidfHeader = header;
if (FileHeader.videoClass != 0x01 || LockBitmap == null)
{
return;
}
if (!VideoEnabled)
{
return;
}
lock (this)
{
int frameSpace = (int)Math.Max(header.frameSpace - RawFixOffset, 0);
int startPos = rawPos + frameSpace;
int length = rawLength - frameSpace;
if (!DebayeringEnabled)
{
RawPixelData = new byte[length];
Array.Copy(rawData, startPos, RawPixelData, 0, length);
return;
}
/* first extract the raw channel values */
Bitunpack.Process(rawData, startPos, rawLength, PixelData);
/* then debayer the pixel data */
Debayer.Process(PixelData, RGBData);
/* and transform into a bitmap for displaying */
LockBitmap.LockBits();
int pos = 0;
uint[] average = new uint[] { 0, 0, 0 };
for (int y = 0; y < RawiHeader.yRes; y++)
{
for (int x = 0; x < RawiHeader.xRes; x++)
{
float r = RGBData[y, x, 0];
float g = RGBData[y, x, 1];
float b = RGBData[y, x, 2];
if (ColorLut != null)
{
ColorLut.Lookup(r, g, b, out r, out g, out b);
}
/* now scale to TV black/white levels */
ScaleLevels(ref r);
ScaleLevels(ref g);
ScaleLevels(ref b);
average[0] += (uint)g;
average[1] += (uint)b;
average[2] += (uint)r;
/* limit RGB values */
LockBitmap.Pixels[pos++] = (byte)b;
LockBitmap.Pixels[pos++] = (byte)g;
LockBitmap.Pixels[pos++] = (byte)r;
}
}
LockBitmap.UnlockBits();
int pixels = RawiHeader.yRes * RawiHeader.xRes;
/* make sure the average brightness is somewhere in the mid range */
if (Math.Abs(_ExposureCorrection) == 0.0f)
{
double averageBrightness = (average[0] + average[1] + average[2]) / (3 * pixels);
if (averageBrightness < 100)
{
Debayer.Brightness *= 1.0f + (float)(100.0f - averageBrightness) / 100.0f;
}
if (averageBrightness > 200)
{
Debayer.Brightness /= 1.0f + (float)(averageBrightness - 200.0f) / 55.0f;
}
}
else
{
Debayer.Brightness = (float)Math.Pow(2, _ExposureCorrection);
}
FrameUpdated = true;
}
}