/**
* Retrieves a file from the #Camera.
*
* @param camera a #Camera
* @param folder a folder
* @param file the name of a file
* @param type the #CameraFileType
* @param camera_file a #CameraFile
* @param context a #GPContext
* @return a gphoto2 error code
*
**/
int
gp_camera_file_get (Camera *camera, const char *folder, const char *file,
CameraFileType type, CameraFile *camera_file,
GPContext *context)
{
gp_log (GP_LOG_DEBUG, "gphoto2-camera", "Getting file '%s' in "
"folder '%s'...", file, folder);
CHECK_NULL (camera && folder && file && camera_file);
CHECK_INIT (camera, context);
CR (camera, gp_file_clean (camera_file), context);
/* Did we get reasonable foldername/filename? */
if (strlen (folder) == 0) {
CAMERA_UNUSED (camera, context);
return (GP_ERROR_DIRECTORY_NOT_FOUND);
}
if (strlen (file) == 0) {
CAMERA_UNUSED (camera, context);
return (GP_ERROR_FILE_NOT_FOUND);
}
CHECK_RESULT_OPEN_CLOSE (camera, gp_filesystem_get_file (camera->fs,
folder, file, type, camera_file, context), context);
CAMERA_UNUSED (camera, context);
return (GP_OK);
}
/**
* Captures a preview that won't be stored on the camera but returned in
* supplied file.
*
* @param camera a #Camera
* @param file a #CameraFile
* @param context a #GPContext
* @return a gphoto2 error code
*
* For example, you could use gp_capture_preview() for taking some sample
* pictures before calling gp_capture().
*
**/
int
gp_camera_capture_preview (Camera *camera, CameraFile *file, GPContext *context)
{
char *xname;
C_PARAMS (camera && file);
CHECK_INIT (camera, context);
CR (camera, gp_file_clean (file), context);
if (!camera->functions->capture_preview) {
gp_context_error (context, _("This camera can "
"not capture previews."));
CAMERA_UNUSED (camera, context);
return (GP_ERROR_NOT_SUPPORTED);
}
CHECK_RESULT_OPEN_CLOSE (camera, camera->functions->capture_preview (
camera, file, context), context);
gp_file_get_name_by_type (file, "capture_preview", GP_FILE_TYPE_NORMAL, &xname);
/* FIXME: Marcus ... will go away, just keep compatible now. */
gp_file_set_name (file, xname);
free (xname);
CAMERA_UNUSED (camera, context);
return (GP_OK);
}
/**
* Captures a preview that won't be stored on the camera but returned in
* supplied file.
*
* @param camera a #Camera
* @param file a #CameraFile
* @param context a #GPContext
* @return a gphoto2 error code
*
* For example, you could use #gp_capture_preview for taking some sample
* pictures before calling #gp_capture.
*
**/
int
gp_camera_capture_preview (Camera *camera, CameraFile *file, GPContext *context)
{
CHECK_NULL (camera && file);
CHECK_INIT (camera, context);
CR (camera, gp_file_clean (file), context);
if (!camera->functions->capture_preview) {
gp_context_error (context, _("This camera can "
"not capture previews."));
CAMERA_UNUSED (camera, context);
return (GP_ERROR_NOT_SUPPORTED);
}
CHECK_RESULT_OPEN_CLOSE (camera, camera->functions->capture_preview (
camera, file, context), context);
CAMERA_UNUSED (camera, context);
return (GP_OK);
}
void GPhotoCameraWorker::capturePreview()
{
openCamera();
if (m_status != QCamera::ActiveStatus) {
setStatus(QCamera::StartingStatus);
}
gp_file_clean(m_file);
int ret = gp_camera_capture_preview(m_camera, m_file, m_context);
if (GP_OK == ret) {
const char* data;
unsigned long int size = 0;
ret = gp_file_get_data_and_size(m_file, &data, &size);
if (GP_OK == ret) {
m_capturingFailCount = 0;
const QImage &result = QImage::fromData(QByteArray(data, int(size)));
setStatus(QCamera::ActiveStatus);
emit previewCaptured(result);
return;
}
}
qWarning() << "Failed retrieving preview" << ret;
++m_capturingFailCount;
if (m_capturingFailCount >= capturingFailLimit)
{
qWarning() << "Closing camera because of capturing fail";
emit error(QCamera::CameraError, tr("Unable to capture frame"));
setStatus(QCamera::UnloadedStatus);
closeCamera();
}
}
