Windows 10 thumbnail extraction using thumbcache

Use the Windows Shell API to extract thumbnails of size from images in . Images are saved to the current directory in the bitmap format (JPEG also available if it's uncommented before building). Output files do not possess binary identity to those in the thumbcache.

An application to create Windows thumbnails for a given directory and output them to a file. Output files retain their original name, even if the file type changes (i.e. from jpeg to bitmap for the 96x96 thumbnails). Items are cached and then retrieved directly from the thumbcache such that binary identity with actual thumbcache entries is preserved.

As parsing the cache every time an image is thumbnailed is expensive, thumbnails are recovered in batches from the thumbcache. This can be controlled by changing the argument. Note that if batch size is larger than the number of items in the target directory, nothing will be saved. Make sure that all items are processed by selecting batch size such that: num_files_in_directory % batchsize == 0

The same as shellthumbsfromcache above, except that thumbnails are only cached and not extracted from the thumbcache afterwards. Caching is forced, so items which are already cached will be cached again.

Modified code from thumbcache_viewer_cmd (https://github.com/thumbcacheviewer/thumbcacheviewer) to wrap parsing in a function which only extracts thumbnails which are passed in an ID map. Changes largely involve commenting out print statements and using maps to keep track of which cache entries (IDs) should be saved to an output directory.

An application to call lookupThumbcache in order to benchmark the time it takes to parse the thumbcache for particular items.

An application to wrap the CRC64 checksum implementation from thumbcache_viewer_cmd (https://github.com/thumbcacheviewer/thumbcacheviewer). If these checksums are applied to thumbnails extracted from the thumbcache, they may be used to lookup the entry in the cache itself at a later time.

Contains python utilities for generating dummy CRC and SHA256 lists, as well as batch scripts for executing the performance benchmarks multiple times.

Open the shellthumbs.sln solution. You can then build the solution or a given projact for Windows 10 or 8.1 and lower.

If running via Windows Powershell, paths need to use double backslashes. i.e.: C:\Users\USERNAME\....