public BitmapImage GetPreview(EncodeJob job, int previewNumber)
{
Title title = this.Titles.FirstOrDefault(t => t.TitleNumber == job.Title);
Validate.NotNull(title, "GetPreview: Title should not have been null. This is probably a bug.");
// Creat the Expected Output Geometry details for libhb.
hb_geometry_settings_s uiGeometry = new hb_geometry_settings_s
{
crop = new[] { job.Cropping.Top, job.Cropping.Bottom, job.Cropping.Left, job.Cropping.Right },
itu_par = 0,
keep = (int)AnamorphicFactory.KeepSetting.HB_KEEP_WIDTH + (job.KeepDisplayAspect ? 0x04 : 0), // TODO Keep Width?
maxWidth = job.MaxWidth,
maxHeight = job.MaxHeight,
mode = (int)(hb_anamorphic_mode_t)job.Anamorphic,
modulus = job.Modulus,
geometry = new hb_geometry_s
{
height = job.Height,
width = job.Width,
par = job.Anamorphic != Anamorphic.Custom
? new hb_rational_t {
den = title.ParVal.Height, num = title.ParVal.Width
}
: new hb_rational_t {
den = job.PixelAspectY, num = job.PixelAspectX
}
}
};
// Sanatise the input.
Geometry resultGeometry = AnamorphicFactory.CreateGeometry(job, title, AnamorphicFactory.KeepSetting.HB_KEEP_WIDTH); // TODO this keep isn't right.
int width = resultGeometry.Width * resultGeometry.PAR.Num / resultGeometry.PAR.Den;
int height = resultGeometry.Height;
uiGeometry.geometry.height = resultGeometry.Height; // Prased the height now.
int outputWidth = width;
int outputHeight = height;
// Fetch the image data from LibHb
IntPtr resultingImageStuct = HBFunctions.hb_get_preview2(this.hbHandle, job.Title, previewNumber, ref uiGeometry, 0);
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(outputWidth, outputHeight);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, outputWidth, outputHeight), 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, outputWidth * 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);
// Create a Bitmap Image for display.
using (var memoryStream = new MemoryStream())
{
try
{
bitmap.Save(memoryStream, ImageFormat.Bmp);
}
finally
{
bitmap.Dispose();
}
var wpfBitmap = new BitmapImage();
wpfBitmap.BeginInit();
wpfBitmap.CacheOption = BitmapCacheOption.OnLoad;
wpfBitmap.StreamSource = memoryStream;
wpfBitmap.EndInit();
wpfBitmap.Freeze();
return(wpfBitmap);
}
}
/// <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));
}
