Invalid Memory issue while executing E04-Live_View.java

[vidyapiquor]

Hi,
I am trying to run the java wrapper for my canon EOS 1300D and it is giving erro of type INVALID MEMORY ACCESS after debug i got the issue in this line "err = CanonUtils.toEdsError( CanonCamera.EDSDK.EdsCreateMemoryStream( new NativeLong( 0 ), streamRef ) );" after this line my code is giving error. please help.

[stefanocapitanio]

I have an issue similar to vidyapiquor:

(decommented system out) Received new command, processing CanonCamera.OpenSessionCommand

Received new command, processing ShootCommand
Exception in thread "Thread-0" java.lang.Error: Invalid memory access
        at com.sun.jna.Native.invokeInt(Native Method)
        at com.sun.jna.Function.invoke(Function.java:390)
        at com.sun.jna.Function.invoke(Function.java:323)
        at com.sun.jna.Library$Handler.invoke(Library.java:236)
        at com.sun.proxy.$Proxy0.EdsCreateMemoryStream(Unknown Source)
        at edsdk.utils.CanonUtils.getLiveViewImageReference(CanonUtils.java:970)
        at edsdk.utils.CanonUtils.isLiveViewEnabled(CanonUtils.java:935)
        at edsdk.api.commands.ShootCommand.run(ShootCommand.java:125)
        at edsdk.api.CanonCamera.dispatchMessages(CanonCamera.java:161)
        at edsdk.api.CanonCamera.access$000(CanonCamera.java:61)
        at edsdk.api.CanonCamera$1.run(CanonCamera.java:102)

I'm using EDSDKv0308W. Could you help me?

[kritzikratzi]

i haven't maintained this library in a long time (around edsdk2.14 or smthg like that). maybe @WolfgangFahl knows what's up with bindings for newer versions of the edsdk... (i see there's some generated code, but it's not used yet by the api.* classes).

[Blackdread]

That's unfortunate, difficult to see why you get this error.
In any case I am redoing an API (as you were not maintaining anymore) with latest version of EDSDK, I have not finished: https://github.com/Blackdread/canon-sdk-java

I will investigate more on this issue later, but with my camera I have not encountered this error with my live view implementation tests.

[stefanocapitanio]

i haven't maintained this library in a long time (around edsdk2.14 or smthg like that). maybe @WolfgangFahl knows what's up with bindings for newer versions of the edsdk... (i see there's some generated code, but it's not used yet by the api.* classes).

There are generated classes because the error is happening running a JAR in Windows. Now I'll try to reproduce this error with my MacBook with debug (or configure a development enviroment on a windows machine).

[stefanocapitanio]

That's unfortunate, difficult to see why you get this error.
In any case I am redoing an API (as you were not maintaining anymore) with latest version of EDSDK, I have not finished: https://github.com/Blackdread/canon-sdk-java

Thank you, I'll try also your new API! ;-)

[stefanocapitanio]

I've forced CanonUtils.isLiveViewEnabled to true (because I don't need to know if is enabled live view, it's always disabled and I know that).
Now I can take photo with E01_Simple code (and I find the photo on my SD card), but with E02_Simpler I've a single photo null, but no errors.

Never printed this:

if ( photo != null ) {
   System.out.println( "Saved photo as: " + photo.getCanonicalPath() );
}

If I try this, I get an empty file IMG_001.jpg:
final File[] photos = camera.shoot( EdsSaveTo.kEdsSaveTo_Host, Integer.MAX_VALUE, new File(System.getProperty("user.home") + File.separator + "Pictures" + File.separator ) );

It's a problem of the EDSDK?

Another thing, I have always this error:

Could not check if mirror lockup enabled: An error occurred while getting kEdsPropID_CFn data (error 7: EDS_ERR_NOT_SUPPORTED - Not Supported)

E01_Simple output:

----------------
allocated@0x15d48338 (4 bytes) (edsdk.bindings.EdSdkLibrary$EdsCameraListRef$ByReference@15d48338): 0
----------------
----------------
allocated@0x15d48338 (4 bytes) (edsdk.bindings.EdSdkLibrary$EdsCameraListRef$ByReference@15d48338): 25016
----------------
native@0x5861b8 (edsdk.bindings.EdSdkLibrary$EdsCameraListRef@5861b8): 281481199266176
Cameras: 1
----------------
allocated@0x15e0fbf8 (4 bytes) (edsdk.bindings.EdSdkLibrary$EdsCameraRef$ByReference@15e0fbf8): 0
----------------
----------------
allocated@0x15e0fbf8 (4 bytes) (edsdk.bindings.EdSdkLibrary$EdsCameraRef$ByReference@15e0fbf8): 25632
----------------
native@0x5b6420 (edsdk.bindings.EdSdkLibrary$EdsCameraRef@5b6420): 281481199288452
Event!!!513.0, null
Event!!!513.0, null
Event!!!516.0, null

Never happened to you? ah, my camera is a EOS 3000D.

Thank you

[Blackdread]

@stefanocapitanio I have released version 1.0.0 that I consider usable in production, try it and tell me if you get same error.