1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "VrManagerService"
18
19 #include <android_runtime/AndroidRuntime.h>
20 #include <jni.h>
21 #include <JNIHelp.h>
22
23 #include <utils/Errors.h>
24 #include <utils/Log.h>
25 #include <hardware/hardware.h>
26 #include <hardware/vr.h>
27
28 namespace android {
29
30 static vr_module_t *gVrHardwareModule = NULL;
31
32
init_native(JNIEnv *,jclass)33 static void init_native(JNIEnv* /* env */, jclass /* clazz */) {
34 if (gVrHardwareModule != NULL) {
35 // This call path should never be hit.
36 ALOGE("%s: May not initialize VR hardware module more than once!", __FUNCTION__);
37 return;
38 }
39
40 int err = hw_get_module(VR_HARDWARE_MODULE_ID, (hw_module_t const**)&gVrHardwareModule);
41 if (err) {
42 ALOGW("%s: Could not open VR hardware module, error %s (%d).", __FUNCTION__,
43 strerror(-err), err);
44 return;
45 }
46
47 // Call init method if implemented.
48 if (gVrHardwareModule->init) {
49 gVrHardwareModule->init(gVrHardwareModule);
50 }
51 }
52
setVrMode_native(JNIEnv *,jclass,jboolean enabled)53 static void setVrMode_native(JNIEnv* /* env */, jclass /* clazz */, jboolean enabled) {
54 if (gVrHardwareModule == NULL) {
55 // There is no VR hardware module implemented, do nothing.
56 return;
57 }
58
59 // Call set_vr_mode method, this must be implemented if the HAL exists.
60 gVrHardwareModule->set_vr_mode(gVrHardwareModule, static_cast<bool>(enabled));
61 }
62
63 static const JNINativeMethod method_table[] = {
64 { "initializeNative", "()V", (void*)init_native },
65 { "setVrModeNative", "(Z)V", (void*)setVrMode_native },
66 };
67
register_android_server_vr_VrManagerService(JNIEnv * env)68 int register_android_server_vr_VrManagerService(JNIEnv *env)
69 {
70 return jniRegisterNativeMethods(env, "com/android/server/vr/VrManagerService",
71 method_table, NELEM(method_table));
72 }
73
74 }; // namespace android
75