public Bitmap GetPreview(PreviewSettings settings, int previewNumber, int deinterlace)
{
SourceTitle title = this.Titles.TitleList.FirstOrDefault(t => t.Index == settings.TitleNumber);
// Create the Expected Output Geometry details for libhb.
hb_geometry_settings_s uiGeometry = new hb_geometry_settings_s
{
crop = new[] { settings.Cropping.Top, settings.Cropping.Bottom, settings.Cropping.Left, settings.Cropping.Right },
itu_par = 0,
keep = (int)AnamorphicFactory.KeepSetting.HB_KEEP_WIDTH + (settings.KeepDisplayAspect ? 0x04 : 0), // TODO Keep Width?
maxWidth = settings.MaxWidth,
maxHeight = settings.MaxHeight,
mode = (int)(hb_anamorphic_mode_t)settings.Anamorphic,
modulus = settings.Modulus ?? 16,
geometry = new hb_geometry_s
{
height = settings.Height,
width = settings.Width,
par = settings.Anamorphic != Anamorphic.Custom
? new hb_rational_t {
den = title.Geometry.PAR.Den, num = title.Geometry.PAR.Num
}
: new hb_rational_t {
den = settings.PixelAspectY, num = settings.PixelAspectX
}
}
};
// Fetch the image data from LibHb
IntPtr resultingImageStuct = HBFunctions.hb_get_preview2(this.hbHandle, settings.TitleNumber, previewNumber, ref uiGeometry, deinterlace);
hb_image_s image = InteropUtilities.ToStructureFromPtr <hb_image_s>(resultingImageStuct);
// Copy the filled image buffer to a managed array.
int stride_width = image.plane[0].stride;
int stride_height = image.plane[0].height_stride;
int imageBufferSize = stride_width * stride_height; // int imageBufferSize = outputWidth * outputHeight * 4;
byte[] managedBuffer = new byte[imageBufferSize];
Marshal.Copy(image.plane[0].data, managedBuffer, 0, imageBufferSize);
var bitmap = new Bitmap(image.width, image.height);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, image.width, image.height), ImageLockMode.WriteOnly, PixelFormat.Format32bppRgb);
IntPtr ptr = bitmapData.Scan0; // Pointer to the first pixel.
for (int i = 0; i < image.height; i++)
{
try
{
Marshal.Copy(managedBuffer, i * stride_width, ptr, stride_width);
ptr = IntPtr.Add(ptr, image.width * 4);
}
catch (Exception exc)
{
Debug.WriteLine(exc); // In theory, this will allow a partial image display if this happens. TODO add better logging of this.
}
}
bitmap.UnlockBits(bitmapData);
// Close the image so we don't leak memory.
IntPtr nativeJobPtrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(IntPtr)));
Marshal.WriteIntPtr(nativeJobPtrPtr, resultingImageStuct);
HBFunctions.hb_image_close(nativeJobPtrPtr);
Marshal.FreeHGlobal(nativeJobPtrPtr);
return(bitmap);
}
/// <summary>
/// Gets the language object for the given code.
/// </summary>
/// <param name="code">The ISO-639-2 code for the language.</param>
/// <returns>Object that describes the language.</returns>
public static Language Get(string code)
{
iso639_lang_t language = InteropUtilities.ToStructureFromPtr <iso639_lang_t>(HBFunctions.lang_for_code2(code));
return(HandBrakeUnitConversionHelpers.NativeToLanguage(language));
}