Changing Camera Resolution

[aml_1989]

Hi All!

I have an application to Geo-Tag photos on N95, and I need to change the resolution for E-Mail / MMS at runtime (my menus are already set up).

It's based on the Camera Example source code, and I can change resolution at compile time with

const TUint KImageSizeIndex = 1; /*any number between 0 (5.0MP) and 4 (0.3MP)*/

Image quality can be reduced with CCamera::SetJpegQuality( TInt ), which I am aware of but isn't much use.

All comments welcome!

Andy.

[Sorcery-ltd]

Hi,

Can't you just convert the constant for the image size to a variable and set up the appropriate value based on menu selections - it's just passed into the "prepare" function in the camera engine?

Or do you mean you want to re-size the images after you have captured them? In which case you probably need to use the ICL (CImageDecoder, possibly CBitmapScaler if the image decoder won't scale enough on its own and then CImageEncoder to go back to JPEG again).

Hope that helps,
Sorcery

[aml_1989]

I can set it to a variable, but the only time it is used is on startup.

i.e. Whatever the user sets that variable to will never be called, as CCameraCaptureEngine::_DoViewFinderL() is only called on startup (before the user specifies it's value).


I've already looked into that one, and I think what I need is to delete CCameraCaptureEngine and re-build it with a different value each time it's changed. If anyone knows the best way to do this, please let me know!

Unless anyone knows an easier way!

Andy.

[Sorcery-ltd]

Hi,

Sorry, I didn't mean "just" convert it to a variable. You have to call PrepareImageCaptureL() with the new value when it is changed. You'd probably want to add a new interface to the camera engine for this. Although you only need to call the function once for multiple captures, there's nothing to stop you calling it again when the size changes.

Does that make more sense?

Sorcery

[aml_1989]

Working now! It was the CCamera::PrepareImageCaptureL() function I needed.

I'm just confused why the exact same method didn't work for me a few weeks ago...

Thanks for your time,
Andy.