LRFTools. Convert LRF to EPUB, HTML, PDF and RTF

[igorsk]

Originally Posted by elinares

I've tested both books with Calibre, it can not show or transform none of them. The unscrambling method described on sven.de/librie is exactly the same I implemented in LRFTools, but for some streams it does not work.

I'm going to pm you the books.

Thanks for the sample. I did a little debugging, and apparently the correct calculation looks like this:

uint8_t get_local_key(int streamlen, uint8_t key)
{
  if ( key && key <= 0xF0u )
    return streamlen % key + 0xF;
  else
    return 0;
}

Note the extra check and that only 8 bits of the key are used.

[elinares]

Originally Posted by igorsk

Thanks for the sample. I did a little debugging, and apparently the correct calculation looks like this:

Hi igorsk,
I've testing the algorithm and this is working right now for me:

        BYTE keybyte;

        declen = LengthOfStream
        keybyte = (declen % (PsuedoEncryptionKeyByte&0xFF)) + 0x0F; 
        if ((type == 0x11)||(type == 0x19)||(type == 0x17))
        {
            if (declen > 0x400) declen = 0x400;
        }       
        for (i = 0; i < declen; i++) {
            *(p + i) ^= keybyte;
        }

For both books (Ed Lacy) PseudoEncriptionKeyByte = -480 (int);
but -480&0xFF = 32, that`s the correct module for declen.

[elinares]

Originally Posted by RandallFlagg

I tried out your fix and it was able to convert lrf to epub. I was able to add a cover via Calibre. Unfortunately all the text was pushed together, no idents or paragraphs. Also the fonts change size throughout the book and line spacing isn't consistant. Thanks and I'll try it again should you make any newer changes. Lastly, I just reconverted it again to make sure it wasn't Calibre when I converted back to lrf. It's not, the epub looks like this in Adobe DE.

Hi RandallFlagg,
I've performed some changes to lrf conversion as you can see:

I'm going to upload this new version right now.

[elinares]

Finally I've found correct way to descrambling streams in LRF, including images; and also I've corrected many bugs regarding text flow.
@RandallFlag: thanks for the examples
@igorsk:thanks for your info.
Enjoy,
Eladio

[RandallFlagg]

Thanks for all your hard work. I'm downloading it now and will try it out in a bit.

[nrapallo]

Originally Posted by elinares

Finally I've found correct way to descrambling streams in LRF, including images; and also I've corrected many bugs regarding text flow.
@RandallFlag: thanks for the examples
@igorsk:thanks for your info.
Enjoy,
Eladio

Congratulations for improving your .lrf conversion to more portable formats.

Your hard work is truly admirable. Keep up the good work!

A bit of karma coming your way....

[elinares]

Originally Posted by bcmartinez

Hello! I'm trying out the PDF2EPUB conversion and I get the following error. Any suggestions?



Thanks!

Bad luck... this exception is thrown in pdfbox library and stops execution. It cannot recognize some ColorMaps and i can not catch Exception and continue, so we must wait for pdfbox boys to found correct maps for some images.

[jig]

I get the following trying to convert several books from LRF to EPUB with ver 204.

java.lang.NegativeArraySizeException
at lrf.objects.Book.getMetaData(Book.java:228)
at lrf.objects.Book.<init>(Book.java:113)
at lrf.RecurseDirs.convertAction(RecurseDirs.java:515 )
at lrf.RecurseDirs.convertActionParams(RecurseDirs.ja va:342)
at lrf.RecurseDirs.<init>(RecurseDirs.java:88)
at lrf.RecurseDirs.main(RecurseDirs.java:40)

Have successfully converted many other books (on a Mac). But a few won't convert.

I also have one book that gets the following exception:
java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Buffer.java:520)
at java.nio.DirectByteBuffer.getInt(DirectByteBuffer. java:648)
at lrf.buffer.MappedReader.getInt(MappedReader.java:7 0)
at lrf.objects.Book.loadObjects(Book.java:342)
at lrf.objects.Book.<init>(Book.java:115)
at lrf.RecurseDirs.convertAction(RecurseDirs.java:515 )
at lrf.RecurseDirs.convertActionParams(RecurseDirs.ja va:342)
at lrf.RecurseDirs.<init>(RecurseDirs.java:88)
at lrf.RecurseDirs.main(RecurseDirs.java:40)

It might be possible the files are corrupt as I don't have another method to test their correctness.

Also, many (most? all?) conversions end up with Unknown as author and title and no cover art.

Great set of tools. Any help appreciated.
Thanks.

[elinares]

Originally Posted by jig

I get the following trying to convert several books from LRF to EPUB with ver 204.

java.lang.NegativeArraySizeException
at lrf.objects.Book.getMetaData(Book.java:228)

Have successfully converted many other books (on a Mac). But a few won't convert.

I also have one book that gets the following exception:
java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Buffer.java:520)

It might be possible the files are corrupt as I don't have another method to test their correctness.

Also, many (most? all?) conversions end up with Unknown as author and title and no cover art.

Great set of tools. Any help appreciated.
Thanks.

I can tak a look to these books if you pm me.
Eladio.

[alxwang]

How to make this tool works with Chinese?
I convert some Chinese LRF to PDF but all text gone.
I guess it is because Chinese font is not referenced?
Thanks.

[elinares]

Originally Posted by alxwang

How to make this tool works with Chinese?
I convert some Chinese LRF to PDF but all text gone.
I guess it is because Chinese font is not referenced?
Thanks.

Not sure, Can you pm me a download link for the book?

[alxwang]

One more suggestion - maybe I just do not know how to use it.
When convert to HTML, All of images are name as 1.jpg, 2.jpg....
Can you change it to something like: 00001.jpg, 00002.jpg .... 011011.jpg.
The reason I ask this is because I use this tool to convert comics. DR1000 can display jpg directly but the files sort order got problem.
Thanks.

[elinares]

Originally Posted by alxwang

One more suggestion - maybe I just do not know how to use it.
When convert to HTML, All of images are name as 1.jpg, 2.jpg....
Can you change it to something like: 00001.jpg, 00002.jpg .... 011011.jpg.
The reason I ask this is because I use this tool to convert comics. DR1000 can display jpg directly but the files sort order got problem.
Thanks.

OK, change commited. Next release will use same lenght names for images.

[elinares]

Originally Posted by alxwang

How to make this tool works with Chinese?
I convert some Chinese LRF to PDF but all text gone.
I guess it is because Chinese font is not referenced?
Thanks.

Please try to convert to html (-html option) and review transformed doc: Has sense to you? I think chinese font must be embedded on pdf...

[alxwang]

HTML works but:
1. Image reference got problem.
2. Random crash about index outbound

Or you can add one more param to let me give you what base font I installed for Chinese?
Then you can use the font I papered to create PDF.
For example:
-basefont "/usr/share/fonts/ttf/
fc-cache/msyh.ttf"

You can just create all font like:
BaseFont.createFont("/usr/share/fonts/ttf/
fc-cache/msyh.ttf", BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED);

Thanks