View Finder not displayed in N96

[Kaz32]

Hi i'm try to use ccamera to capture image

In many devices it can run well.
But in nokia N96 the view finder is not displayed...
(maybe because N96 is FP2 ??)
What is the problem?
How to solved this problem?


Or there is any example that i can learn?


Thx a lot

[symbianyucca]

I thikn you should debug the application a bit omre to see what it is that is going wrong with it.. wit the current information is it rather impossible to know what goes wrong inside of it.

[Kaz32]

Ah i guess N96 not support DirectViewFinder, i change to BitmapViewFinder and it can capture image well.


But now i got another problem (in other devices, not n96), why in the function
ImageReady(CFbsBitmap* /*aBitmap*/, HBufC8* aData, TInt aError)

the aData is not there yet, so if i save the image to file it will panic

what's wrong with the aData?

Anyone know this problem?

Thx a lot

[wizard_hu_]

aBitmap and aData are not just random variables, they are going to have some content according to what kind of output you have requested. Check TFormat once more. EFormatFbsBitmapColorXy will produce "CFbsBitmap *aBitmap", everything else will result in "HBufC8 *aData".

[Kaz32]

aBitmap and aData are not just random variables, they are going to have some content according to what kind of output you have requested. Check TFormat once more. EFormatFbsBitmapColorXy will produce "CFbsBitmap *aBitmap", everything else will result in "HBufC8 *aData".

i using EFormatJpeg in this case

the aData maybe NULL,
but i need that aData, so i can write it to file

O yah i want to ask about the viewfinfer mode, if i only use bitmapviewfinder is that OK?

Thx

[wizard_hu_]

Hmm... If aData is NULL, aError probably is not. You may want to check it (I can easily imagine KErrNoMemory for example).
By the way: low-memory situations and the like may also affect the viewfinder.

[Kaz32]

i'm using this in my code :


void CCameraEngine::ImageReady(CFbsBitmap* /*aBitmap*/, HBufC8* aData, TInt aError)
{
if ((KErrNone == aError) && (aData))
{
// saving method...
....

User::LeaveIfError(file.Write(aData));


delete aData;
}
else
{
iObserver.OnError(aError); --->notify the error
}
}


nah i got error = 0, suppose the aData is the problem, right?
but why the aData is not there?

Need help please

Thx

[wizard_hu_]

Although I would expect some error code if EFormatJpeg is not supported, have you really checked if EFormatJpeg+the size index you use would produce something (EnumerateCaptureSizes)?
Alternatively you may try EFormatExif.

Note that your code is hypothetical, file.Write(aData) can not compile if aData is HBufC8*. Prefer copy-paste when posting.

[Kaz32]

Although I would expect some error code if EFormatJpeg is not supported, have you really checked if EFormatJpeg+the size index you use would produce something (EnumerateCaptureSizes)?
Alternatively you may try EFormatExif.

Note that your code is hypothetical, file.Write(aData) can not compile if aData is HBufC8*. Prefer copy-paste when posting.

Ah ya forgot the star *aData

TRAPD(err, iCamera->PrepareImageCaptureL(format, 2));
ok try to check the size, maybe from 0 - 3

Oh yah how to check the format supported and size supported by the device?


Thx again wizard_hu

[Kaz32]

o ya in my code to check the supported format is like this:


iCamera->CameraInfo(iCameraInfo);

if ((iCameraInfo.iImageFormatsSupported & CCamera::EFormatJpeg) > 0)
format = CCamera::EFormatJpeg;
else if ((iCameraInfo.iImageFormatsSupported & CCamera::EFormatExif) > 0)
format = CCamera::EFormatExif;

is that ok?

[wizard_hu_]

It seems to be fine. However since you say it actually does not work, you may want to try checking for exif-support first.
And/or you may consider adding an else at the end in order to see if neither branch has been executed (a simple User::Panic could do the job).

[Kaz32]

It seems to be fine. However since you say it actually does not work, you may want to try checking for exif-support first.
And/or you may consider adding an else at the end in order to see if neither branch has been executed (a simple User::Panic could do the job).

in the if statement, the format is in the CCamera::EFormatJpeg,
but the aData error, maybe i must try another format yah?
(in format exif the devices not support)

[wizard_hu_]

Oh yah how to check the format supported and size supported by the device?

Oh, I have not noticed this question so far. You already know the format.
For the sizes you can expect, check CCamera::EnumerateCaptureSizes (aSize is an output argument, it is going to contain the size for the specified size index).

[Kaz32]

Eh I try in format EFormatFbsBitmapColor16M, so my imageready function :

void CCameraEngine::ImageReady(CFbsBitmap* aBitmap, HBufC8* aData, TInt aError)
{
if ((KErrNone == aError) && (aData))
{
// saving method...
...

User::LeaveIfError(file.Write(*aData));


delete aData;
}
// In format EFormatFbsBitmapColor16M
// Add this, because the aData doesn't exist
else if((KErrNone == aError) && (aBitmap))
{
// converting aBitmap to jpg
....

}
else
{
iObserver.OnError(aError); --->notify the error
}
}


the image can save to the jpg,
but the problem is the image rather flicker/ failure in the right section of the image
any one know this problem?

O Yah the devices i used is Samsung Innov8/ i8510
(eh what is web of samsung forum?, just like this forum but for samsung?)

Thx