public string GetImageUrl(ThumbnailQuality quality, int index = 0)
{
if (Date == null)
{
throw new Exception("插画日期为空时无法获取插画图片链接");
}
//除了原图外所有图片默认后缀统一为jpg
var ext = "jpg";
if (quality == ThumbnailQuality.Original)
{
if (Suffix == null)
{
throw new Exception("后缀为空时无法获取原图链接");
}
ext = Suffix;
}
switch (quality)
{
case ThumbnailQuality.Original: return($"{ImageBaseUri}/img-original/img/{Date}/{Id}_p{index}.{ext}");
//original
default: return($"{ImageBaseUri}/img-original/img/{Date}/{Id}_p{index}.{ext}");
}
}
private Bitmap GetThumbnail(Video videoInfo, ThumbnailQuality quality = ThumbnailQuality.Standard)
{
Bitmap result = null;
string url = GetThumbnailUrl(videoInfo, quality: quality);
if (!String.IsNullOrWhiteSpace(url))
{
try
{
using (WebClient webClient = new WebClient())
{
using (Stream stream = webClient.OpenRead(url))
{
result = new Bitmap(stream);
stream.Close();
stream.Dispose();
}
webClient.Dispose();
}
}
catch (Exception ex)
{
Logger.Log(EventID.DIYoutubeDownloader.Downloader.GetThumbnailException, ex);
}
}
return(result);
}
private string GetThumbnailUrl(Video videoInfo, ThumbnailQuality quality = ThumbnailQuality.Standard)
{
string url = null;
if (videoInfo != null)
{
switch (quality)
{
case ThumbnailQuality.Low:
url = videoInfo.Thumbnails.LowResUrl;
break;
case ThumbnailQuality.Standard:
url = videoInfo.Thumbnails.StandardResUrl;
break;
case ThumbnailQuality.Medium:
url = videoInfo.Thumbnails.MediumResUrl;
break;
case ThumbnailQuality.High:
url = videoInfo.Thumbnails.HighResUrl;
break;
case ThumbnailQuality.Max:
url = videoInfo.Thumbnails.MaxResUrl;
break;
default:
url = videoInfo.Thumbnails.MediumResUrl;
break;
}
}
return(url);
}
public static string Stringify(this ThumbnailQuality quality)
{
switch (quality)
{
case ThumbnailQuality.S128: return("128x128");
case ThumbnailQuality.S240: return("240mw");
case ThumbnailQuality.S360: return("360x360");
case ThumbnailQuality.S480: return("480mw");
case ThumbnailQuality.Mini: return("mini");
case ThumbnailQuality.Original: return("original");
case ThumbnailQuality.Regular: return("regular");
case ThumbnailQuality.Small: return("small");
case ThumbnailQuality.Thumbnail: return("thumb");
//Regular
default: return("regular");
}
}
public static int Value(this ThumbnailQuality thumbnailQuality)
{
return(thumbnailQuality switch
{
ThumbnailQuality.Low => 70,
ThumbnailQuality.Medium => 150,
ThumbnailQuality.High => 300,
_ => throw new ArgumentOutOfRangeException(nameof(thumbnailQuality), "This state of ThumbnailQuality is not valid.")
});
private int TranslateQualitySetting(ThumbnailQuality quality)
{
switch (quality)
{
case ThumbnailQuality.Normal:
return 200;
case ThumbnailQuality.High:
return 400;
case ThumbnailQuality.Full:
return 0;
default:
throw new ArgumentException();
}
}
private int TranslateQualitySetting(ThumbnailQuality quality)
{
switch (quality)
{
case ThumbnailQuality.Normal:
return 200;
case ThumbnailQuality.High:
return 400;
case ThumbnailQuality.Full:
return 0;
default:
throw new ArgumentException();
}
}
private void UpdateThumbnails(ThumbnailQuality quality)
{
var ctx = SynchronizationContext.Current;
var canceller = new CancellationTokenSource();
if (_cancelThumbnailsUpdate != null)
{
_cancelThumbnailsUpdate.Cancel();
}
_cancelThumbnailsUpdate = canceller;
Task.Factory.StartNew(() =>
{
if (_imageItems.Count == 0)
{
return;
}
Parallel.ForEach(Partitioner.Create(0, _imageItems.Count), (range, loopState) =>
{
bool isCancelled = false;
for (int i = range.Item1; i < range.Item2; i++)
{
var currentItem = _imageItems[i];
var tb = _thumbnailer.GetThumbnail(currentItem.FullName, quality);
ctx.Post(new SendOrPostCallback((state) => currentItem.Thumbnail = tb), null);
if (canceller.IsCancellationRequested)
{
isCancelled = true;
break;
}
}
if (isCancelled)
{
loopState.Stop();
}
});
canceller.Dispose();
if (_cancelThumbnailsUpdate == canceller)
{
_cancelThumbnailsUpdate = null;
}
},
CancellationToken.None, TaskCreationOptions.LongRunning, TaskScheduler.Default);
}
public System.Windows.Media.ImageSource GetThumbnail(string imagePath, ThumbnailQuality quality)
{
IShellItem shItem;
Guid iIdIShellItem = new Guid("43826d1e-e718-42ee-bc55-a1e261c37bfe");
var hr = SHCreateItemFromParsingName(imagePath, IntPtr.Zero, iIdIShellItem, out shItem);
if (hr == 0)
{
Guid IID_IUnknown = new Guid("00000000-0000-0000-C000-000000000046");
Guid CLSID_LocalThumbnailCache = new Guid("50EF4544-AC9F-4A8E-B21B-8A26180DB13F");
var type = Type.GetTypeFromCLSID(CLSID_LocalThumbnailCache);
var tbCache = (IThumbnailCache)Activator.CreateInstance(type);
ISharedBitmap bmp = null;
WTS_CACHEFLAGS cFlags;
WTS_THUMBNAILID bmpId;
uint qualitySetting;
switch (quality)
{
case ThumbnailQuality.Normal:
qualitySetting = 96;
break;
case ThumbnailQuality.High:
case ThumbnailQuality.Full:
qualitySetting = 128;
break;
default:
qualitySetting = 96;
break;
}
hr = (int)tbCache.GetThumbnail(shItem, qualitySetting, WTS_FLAGS.WTS_EXTRACT, out bmp, out cFlags, out bmpId);
if (hr == 0)
{
var bmpPtr = IntPtr.Zero;
if (bmp.Detach(out bmpPtr) == 0)
{
try
{
var iSrc = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
bmpPtr, IntPtr.Zero, Int32Rect.Empty,
System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
DeleteObject(bmpPtr);
iSrc.Freeze();
return iSrc;
}
finally
{
bmpPtr = IntPtr.Zero;
Marshal.ReleaseComObject(bmp);
Marshal.ReleaseComObject(shItem);
bmp = null;
shItem = null;
}
}
else
{
Marshal.ReleaseComObject(bmp);
Marshal.ReleaseComObject(shItem);
return null;
}
}
else
{
Marshal.ReleaseComObject(shItem);
return null;
}
}
return null;
}
public MemoryStream GenerateThumbnailFromFirstPage(string xpsFilePath, XpsImageType imgType, ThumbnailQuality imgQuality = ThumbnailQuality.Medium)
{
if (LogHelper.CanDebug())
{
LogHelper.Begin("XpsHelper.GenerateThumbnailFromFirstPage");
}
try
{
BitmapEncoder bitmapEncoder = null;
XpsDocument xpsDocument = new XpsDocument(xpsFilePath, FileAccess.Read);
FixedDocumentSequence documentPageSequence = xpsDocument.GetFixedDocumentSequence();
string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(xpsFilePath);
string fileExtension = string.Empty;
switch (imgType)
{
case XpsImageType.JpegImageType:
bitmapEncoder = new JpegBitmapEncoder();
break;
case XpsImageType.PngImageType:
bitmapEncoder = new PngBitmapEncoder();
break;
}
double imageQualityRatio = 1.0 / (double)imgQuality;
DocumentPage documentPage = documentPageSequence.DocumentPaginator.GetPage(0);
RenderTargetBitmap targetBitmap = new RenderTargetBitmap((int)(documentPage.Size.Width * imageQualityRatio),
(int)(documentPage.Size.Height * imageQualityRatio),
96.0 * imageQualityRatio,
96.0 * imageQualityRatio,
PixelFormats.Pbgra32);
targetBitmap.Render(documentPage.Visual);
bitmapEncoder.Frames.Add(BitmapFrame.Create(targetBitmap));
MemoryStream memoryStream = new MemoryStream();
bitmapEncoder.Save(memoryStream);
xpsDocument.Close();
return(memoryStream);
}
catch (Exception err)
{
LogHelper.Manage("XpsHelper.GenerateThumbnailFromFirstPage", err);
}
finally
{
LogHelper.End("XpsHelper.GenerateThumbnailFromFirstPage");
}
return(null);
}
public ImageSource GetThumbnail(string imagePath, ThumbnailQuality quality)
{
return GetThumbnailInternal(imagePath, TranslateQualitySetting(quality));
}
public Bitmap GetThumbnail(string mediaUrl, ThumbnailQuality quality = ThumbnailQuality.Standard)
{
return(this.GetThumbnail(this.GetVideoInfo(mediaUrl), quality: quality));
}
public void Assert_GetThumbnail_is_correct(ThumbnailQuality thumbnailQuality, string expected)
{
string thumbnailUrl = youtubeVideo.GetThumbnail(thumbnailQuality);
Assert.AreEqual(thumbnailUrl, expected);
}
public ImageSource GetThumbnail(string imagePath, ThumbnailQuality quality)
{
return GetThumbnailInternal(imagePath, TranslateQualitySetting(quality));
}
public System.Windows.Media.ImageSource GetThumbnail(string imagePath, ThumbnailQuality quality)
{
IShellItem shItem;
Guid iIdIShellItem = new Guid("43826d1e-e718-42ee-bc55-a1e261c37bfe");
var hr = SHCreateItemFromParsingName(imagePath, IntPtr.Zero, iIdIShellItem, out shItem);
if (hr == 0)
{
Guid IID_IUnknown = new Guid("00000000-0000-0000-C000-000000000046");
Guid CLSID_LocalThumbnailCache = new Guid("50EF4544-AC9F-4A8E-B21B-8A26180DB13F");
var type = Type.GetTypeFromCLSID(CLSID_LocalThumbnailCache);
var tbCache = (IThumbnailCache)Activator.CreateInstance(type);
ISharedBitmap bmp = null;
WTS_CACHEFLAGS cFlags;
WTS_THUMBNAILID bmpId;
uint qualitySetting;
switch (quality)
{
case ThumbnailQuality.Normal:
qualitySetting = 96;
break;
case ThumbnailQuality.High:
case ThumbnailQuality.Full:
qualitySetting = 128;
break;
default:
qualitySetting = 96;
break;
}
hr = (int)tbCache.GetThumbnail(shItem, qualitySetting, WTS_FLAGS.WTS_EXTRACT, out bmp, out cFlags, out bmpId);
if (hr == 0)
{
var bmpPtr = IntPtr.Zero;
if (bmp.Detach(out bmpPtr) == 0)
{
try
{
var iSrc = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
bmpPtr, IntPtr.Zero, Int32Rect.Empty,
System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
DeleteObject(bmpPtr);
iSrc.Freeze();
return(iSrc);
}
finally
{
bmpPtr = IntPtr.Zero;
Marshal.ReleaseComObject(bmp);
Marshal.ReleaseComObject(shItem);
bmp = null;
shItem = null;
}
}
else
{
Marshal.ReleaseComObject(bmp);
Marshal.ReleaseComObject(shItem);
return(null);
}
}
else
{
Marshal.ReleaseComObject(shItem);
return(null);
}
}
return(null);
}
private void UpdateThumbnails(ThumbnailQuality quality)
{
var ctx = SynchronizationContext.Current;
var canceller = new CancellationTokenSource();
if (_cancelThumbnailsUpdate != null)
{
_cancelThumbnailsUpdate.Cancel();
}
_cancelThumbnailsUpdate = canceller;
Task.Factory.StartNew(() =>
{
if (_imageItems.Count == 0)
{
return;
}
Parallel.ForEach(Partitioner.Create(0, _imageItems.Count), (range, loopState) =>
{
bool isCancelled = false;
for (int i = range.Item1; i < range.Item2; i++)
{
var currentItem = _imageItems[i];
var tb = _thumbnailer.GetThumbnail(currentItem.FullName, quality);
ctx.Post(new SendOrPostCallback((state) => currentItem.Thumbnail = tb), null);
if (canceller.IsCancellationRequested)
{
isCancelled = true;
break;
}
}
if (isCancelled)
{
loopState.Stop();
}
});
canceller.Dispose();
if (_cancelThumbnailsUpdate == canceller)
{
_cancelThumbnailsUpdate = null;
}
},
CancellationToken.None, TaskCreationOptions.LongRunning, TaskScheduler.Default);
}
