public RawPreviewData GetPreview(JsonEncodeObject settings, int previewNumber)
{
// Fetch the image data from LibHb
string taskJson = JsonSerializer.Serialize(settings, JsonSettings.Options);
IntPtr resultingImageStruct = HBFunctions.hb_get_preview3_json(this.Handle, previewNumber, taskJson);
hb_image_s image = InteropUtilities.ToStructureFromPtr <hb_image_s>(resultingImageStruct);
// 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;
byte[] managedBuffer = new byte[imageBufferSize];
Marshal.Copy(image.plane[0].data, managedBuffer, 0, imageBufferSize);
RawPreviewData preview = new RawPreviewData(managedBuffer, stride_width, stride_height, image.width, image.height);
// Close the image so we don't leak memory.
IntPtr nativeJobPtrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(IntPtr)));
Marshal.WriteIntPtr(nativeJobPtrPtr, resultingImageStruct);
HBFunctions.hb_image_close(nativeJobPtrPtr);
Marshal.FreeHGlobal(nativeJobPtrPtr);
return(preview);
}
public static Bitmap ConvertByteArrayToBitmap(RawPreviewData previewData)
{
var bitmap = new Bitmap(previewData.Width, previewData.Height);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, previewData.Width, previewData.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppRgb);
IntPtr targetPtr = bitmapData.Scan0; // Pointer to the first pixel.
try
{
for (int i = 0; i < previewData.Height; i++)
{
Marshal.Copy(previewData.RawBitmapData, i * previewData.StrideWidth, targetPtr, previewData.Width * 4);
targetPtr = IntPtr.Add(targetPtr, previewData.Width * 4);
}
bitmap.UnlockBits(bitmapData);
}
catch (Exception exc)
{
Debug.WriteLine(exc);
}
return(bitmap);
}
public static Bitmap ConvertByteArrayToBitmap(RawPreviewData previewData)
{
var bitmap = new Bitmap(previewData.Width, previewData.Height);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, previewData.Width, previewData.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppRgb);
IntPtr ptr = bitmapData.Scan0; // Pointer to the first pixel.
for (int i = 0; i < previewData.Height; i++)
{
try
{
Marshal.Copy(previewData.RawBitmapData, i * previewData.StrideWidth, ptr, previewData.StrideWidth);
ptr = IntPtr.Add(ptr, previewData.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);
return(bitmap);
}
public RawPreviewData GetPreview(PreviewSettings settings, int previewNumber, bool 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 && settings.Anamorphic != Anamorphic.Automatic
? 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.Handle, settings.TitleNumber, previewNumber, ref uiGeometry, deinterlace ? 1 : 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);
RawPreviewData preview = new RawPreviewData(managedBuffer, stride_width, stride_height, image.width, image.height);
// 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(preview);
}
/// <summary>
/// Get a Preview image for the current job and preview number.
/// </summary>
/// <param name="job">
/// The job.
/// </param>
/// <param name="preview">
/// The preview.
/// </param>
/// <returns>
/// The <see cref="BitmapImage"/>.
/// </returns>
public BitmapImage GetPreview(EncodeTask job, int preview)
{
if (this.instance == null)
{
return(null);
}
BitmapImage bitmapImage = null;
try
{
EncodeTaskFactory factory = new EncodeTaskFactory(this.userSettingService);
JsonEncodeObject jobDict = factory.Create(job, HBConfigurationFactory.Create());
RawPreviewData bitmapData = this.instance.GetPreview(jobDict, preview);
bitmapImage = BitmapUtilities.ConvertToBitmapImage(BitmapUtilities.ConvertByteArrayToBitmap(bitmapData));
}
catch (AccessViolationException e)
{
Debug.WriteLine(e);
}
return(bitmapImage);
}
/// <summary>
/// Get a Preview image for the current job and preview number.
/// </summary>
/// <param name="job">
/// The job.
/// </param>
/// <param name="preview">
/// The preview.
/// </param>
/// <returns>
/// The <see cref="BitmapImage"/>.
/// </returns>
public BitmapImage GetPreview(EncodeTask job, int preview)
{
if (this.instance == null)
{
return(null);
}
BitmapImage bitmapImage = null;
try
{
PreviewSettings settings = new PreviewSettings
{
Cropping = new Cropping(job.Cropping),
MaxWidth = job.MaxWidth ?? 0,
MaxHeight = job.MaxHeight ?? 0,
KeepDisplayAspect = job.KeepDisplayAspect,
TitleNumber = job.Title,
Anamorphic = job.Anamorphic,
Modulus = job.Modulus,
Width = job.Width ?? 0,
Height = job.Height ?? 0,
PixelAspectX = job.PixelAspectX,
PixelAspectY = job.PixelAspectY
};
RawPreviewData bitmapData = this.instance.GetPreview(settings, preview, job.DeinterlaceFilter != DeinterlaceFilter.Off);
bitmapImage = BitmapUtilities.ConvertToBitmapImage(BitmapUtilities.ConvertByteArrayToBitmap(bitmapData));
}
catch (AccessViolationException e)
{
Debug.WriteLine(e);
}
return(bitmapImage);
}
