Re: Error when downloading image directly from memory card

Update! When the error code is 107 there is a 0 byte file created with 
the file name of the original file.

/Peter

On 2021-11-21 11:04, Peter Sonander wrote:
> Thanks Marcus for digging into this. These are my findings so far
> 
> If I do not initialize the camera file system my self it behaves like 
> this:
> 
> Before capturing a new photo:
>    gp_camera_file_get_info returns 0 for .info.fields
>    File is downloaded but returns this 'gp_filesystem_get_file
> (camera->fs, folder, file, type, camera_file, context)' failed: -107
> 
> After a photo has been captured:
>    gp_camera_file_get_info returns 165 for .info.fields
>    File is downloaded with no errors
>    When the capture is done you notice there is a full scan of the
> memory card done.
> 
> 
> If I instead run the code below right after gp_camera_init but before
> setting applicationmode to 1 it works almost all the time. I found
> some cases where if I abort (Ctrl-C) the program and restart where it
> doesn't work, but it always works if I capture a new photo :)
> 
> static void init_fs(Camera *camera, GPContext *context, char *path) {
>         CameraList      *list;
>         int             i, retval, folderCount;
>         const char              *value;
> 
> 
>         retval = gp_list_new( &list );
>         retval = gp_filesystem_list_folders( camera->fs, path, list, 
> context);
>         folderCount = gp_list_count( list );
>         for (i=0; i<folderCount; i++) {
>                 gp_list_get_name( list, i, &value );
>                 char    newPath[strlen(path) + strlen(value)];
>                 strcpy(newPath, path);
>                 if (strcmp(path, "/")!=0) {
>                         strcat(newPath, "/");
>                 }
>                 strcat(newPath, value);
>                 init_fs(camera, context, newPath);
>         }
> }
> 
> called like this: init_fs(camera, context, "/");
> 
> All tries to download a photo is done from the GP_EVENT_FILE_CHANGED 
> event.
> 
> Thanks
> Peter
> 
> On 2021-11-20 16:03, Marcus Meissner wrote:
>> Hi,
>> 
>> It is actually a more interesting problem...
>> 
>> If we switch the camera to application mode, it no longer returns a 
>> filesystem.
>> 
>> $ gphoto2 --set-config applicationmode=1 --wait-event=1s -L
>> Waiting for 1 seconds for events from camera. Press Ctrl-C to abort.
>> UNKNOWN PTP StoreRemoved, Param1 00010001
>> There is no file in folder '/'.
>> $
>> 
>> The storage is "semi visible", e.g. if we access the filehandle from
>> the "changed" event, it can be accessed.
>> 
>> But as the filesystem does not see the storage in the storageids
>> index, it cannot find the right path.
>> 
>> 
>> I need to think a bit on how to handle this... :/
>> 
>> 
>> (A workaround would be on receipt of "file changed" to switch off
>>  application mode, wait for the StoreAdded event, get the file, switch
>>  on application mode, and go back to polling.)
>> 
>> Ciao, Marcus
>> 
>> On Tue, Nov 16, 2021 at 06:40:13PM +0100, Marcus Meissner wrote:
>>> Hi,
>>> 
>>> There probably is a bug in the dynamic fileyystem ifc this shows up, 
>>> I
>>> am currently travelling, perhaps I can reproduce and take a look at 
>>> this
>>> on Thursday.
>>> 
>>> Ciao, Marcus
>>> On Sun, Nov 14, 2021 at 05:16:03PM +0100, Peter Sonander wrote:
>>> > Hi
>>> >
>>> > I have created a small C program which is waiting for the file changed event
>>> > and if the file has been write protected it is download to my computer. This
>>> > works if I first take a new photo by pressing the shutter button, but not if
>>> > I start the program and directly protects an image.
>>> >
>>> > When I take the first photo with the program started it looks like there is
>>> > a file system built as a part of the file added event, but this does not
>>> > happen when the file changed event is happening. How can I make the
>>> > filesystem build to happen either on connection established or when I want
>>> > to download a photo?
>>> >
>>> > This is the debug trace when trying to download a photo without first have
>>> > captured an image during the session
>>> >
>>> > nikon eventex 0: code 0x4007, params 1
>>> > event.Code is 4007 / param 921076e
>>> > Sending PTP_OC 0x1008 (Get object info) (0x921076e) request...
>>> > Reading PTP_OC 0x1008 (Get object info) data...
>>> > Reading PTP_OC 0x1008 (Get object info) response...
>>> > (10001,11210000,/store_00010001/)
>>> > Sending PTP_OC 0x1008 (Get object info) (0x11210000) request...
>>> > Reading PTP_OC 0x1008 (Get object info) data...
>>> > Reading PTP_OC 0x1008 (Get object info) response...
>>> > (10001,11004000,/store_00010001/)
>>> > Sending PTP_OC 0x1008 (Get object info) (0x11004000) request...
>>> > Reading PTP_OC 0x1008 (Get object info) data...
>>> > Reading PTP_OC 0x1008 (Get object info) response...
>>> > (10001,0,/store_00010001/)
>>> > resetting filesystem
>>> > Clearing fscache LRU list...
>>> > fscache LRU list already empty
>>> > Internally deleting all folders from '/'...
>>> > Lookup folder '/'...
>>> > Found! / is 0x1f08468
>>> > Recurse delete folder 0x1f08468//
>>> > Delete all files in folder 0x1f08468//
>>> > Lookup folder /store_00010001/DCIM/132ND500 file D50_1902.NEF
>>> > Lookup folder '/store_00010001/DCIM/132ND500'...
>>> > Folder / is dirty. Listing folders in there to make folder clean...
>>> > Listing folders in /
>>> > Lookup folder '/'...
>>> > Found! / is 0x1f08468
>>> > ... is dirty, getting from camera
>>> > folder_list_func(/)
>>> > Internally deleting all folders from '/'...
>>> > Lookup folder '/'...
>>> > Found! / is 0x1f08468
>>> > Recurse delete folder 0x1f08468//
>>> > Folder / contains 0 subfolders.
>>> > Done making folder / clean...
>>> > File changed on camera: /store_00010001/DCIM/132ND500 / D50_1902.NEF
>>> > Getting file info for 'D50_1902.NEF' in '/store_00010001/DCIM/132ND500'...
>>> > Getting information about 'D50_1902.NEF' in
>>> > '/store_00010001/DCIM/132ND500'...
>>> > Lookup folder /store_00010001/DCIM/132ND500 file D50_1902.NEF
>>> > Lookup folder '/store_00010001/DCIM/132ND500'...
>>> > Downloading ./images/D50_1902.NEF
>>> > Getting file 'D50_1902.NEF' in folder '/store_00010001/DCIM/132ND500'...
>>> > Getting file 'D50_1902.NEF' from folder '/store_00010001/DCIM/132ND500'
>>> > (type 1)...
>>> > Lookup folder /store_00010001/DCIM/132ND500 file D50_1902.NEF
>>> > Lookup folder '/store_00010001/DCIM/132ND500'...
>>> > Download of 'D50_1902.NEF' from '/store_00010001/DCIM/132ND500' (type 1)
>>> > failed. Reason: 'Directory not found'
>>> > 'gp_filesystem_get_file (camera->fs, folder, file, type, camera_file,
>>> > context)' failed: -107
>>> > Failed to download ./images/D50_1902.NEF
>>> >
>>> > Thanks for the support
>>> >
>>> > --
>>> > Med vänlig hälsning
>>> > Peter Sonander
>>> > S-Bilder
>>> > [email protected]
>>> >
>>> > http://s-bilder.se
>>> > Facebook: https://fb.me/sbilder.se/
>>> > Instagram: @FotografPeterSonander
>>> 
>>> 
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>>> 
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