Hi
Thanks for getting back to us.
We wrote an Android application, which involves native (C based) code as well.
From our C code, we try to instantiate an Android MediaDrm object, using widevine. In some cases, we see the crash, as forwarded, but we do not know, why this happens. (this code works without any problem on other Android TV’s).
Here is our MediaDrm instantiating code from C:
jclass cls_uuid = (*env)->FindClass(env, "java/util/UUID");
if(!cls_uuid || (*env)->ExceptionCheck(env)) {
OP_PRINT(LOG_PRIO_ERROR, "checkHDCP: failed to get class java.util.UUID");
HANDLE_EXC(env)
return NULL;
}
jmethodID uuid_constr = getJNIMethod(env, "java/util/UUID", "<init>", "(JJ)V");
if(!uuid_constr || (*env)->ExceptionCheck(env)) {
OP_PRINT(LOG_PRIO_ERROR, "checkHDCP: failed to get constructor for java.util.UUID");
HANDLE_EXC(env)
return NULL;
}
//widevine DRM
jobject cls_uuid_instance = (*env)->NewObject(env, cls_uuid, uuid_constr, 0xEDEF8BA979D64ACE, 0xA3C827DCD51D21ED);
if(!cls_uuid_instance || (*env)->ExceptionCheck(env)) {
OP_PRINT(LOG_PRIO_ERROR, "Failed to get class instance java.util.UUID");
HANDLE_EXC(env)
return NULL;
}
jclass cls_drm = (*env)->FindClass(env, "android/media/MediaDrm");
if(!cls_drm || (*env)->ExceptionCheck(env)) {
OP_PRINT(LOG_PRIO_ERROR, "checkHDCP: failed to get class android/media/MediaDrm/");
HANDLE_EXC(env)
return NULL;
}
jmethodID cls_drm_constr = getJNIMethod(env, "android/media/MediaDrm",
"<init>", "(Ljava/util/UUID;)V");
if(!cls_drm_constr || (*env)->ExceptionCheck(env)) {
OP_PRINT(LOG_PRIO_ERROR, "Failed to get constructor android.media.MediaDrm");
HANDLE_EXC(env)
return NULL;
}
// WE SUSSPECT, THAT THIS CALL FAILS WHEN INITIATING MEDIADRM object
jobject cls_drm_instance = (*env)->NewObject(env, cls_drm, cls_drm_constr, cls_uuid_instance);
if(!cls_drm_instance || (*env)->ExceptionCheck(env)) {
OP_PRINT(LOG_PRIO_ERROR, "Failed to get class instance android.media.MediaDrm");
HANDLE_EXC(env)
return NULL;
}
OP_PRINT is simply writing to the Android LOG and HANDLE_EXC is the following definition:
#define HANDLE_EXC(env) if ((*env)->ExceptionCheck(env)) { (*env)->ExceptionDescribe(env); (*env)->ExceptionClear(env); }
we would very much appreciate, if you could provide us with some insights.
Thanks a lot in advance
