Big/little-endian DPX files... how to load...

[lombrozo]

Hi,

I wonder if you can help.

I am writing a DPX loader and have noticed a number of files with bad 'magic number' elements in the file-information-header. Specifically, the magic number is SDPX when it should be XPDS, indicating big-endian instead of little-endian.

I see that XnView can still read DPX files even if this magic-number is the wrong way round. Also, if I load a DPX file using XnView with the magic-number the wrong way round, then save it using XnView, XnView saves the magic-number the CORRECT way round!

Since the magic-number is the only means of determining the big/little-endian order, how are you determining which way to read the file when the magic-number is the wrong way round?

I hope you can help, thanks,

Simon

[xnview]

Hi,

I wonder if you can help.


I am writing a DPX loader and have noticed a number of files with bad 'magic number' elements in the file-information-header. Specifically, the magic number is SDPX when it should be XPDS, indicating big-endian instead of little-endian.

I see that XnView can still read DPX files even if this magic-number is the wrong way round. Also, if I load a DPX file using XnView with the magic-number the wrong way round, then save it using XnView, XnView saves the magic-number the CORRECT way round!

Since the magic-number is the only means of determining the big/little-endian order, how are you determining which way to read the file when the magic-number is the wrong way round?

I use only this magic number to know if i'm in little or big endian.