1 /*
2 * Copyright (C) 2024 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 "Camera3-Utils"
18
19 #include "Utils.h"
20 #include <android-base/properties.h>
21 #include <com_android_internal_camera_flags.h>
22 #include <utils/Errors.h>
23 #include <utils/Log.h>
24 #include <vendorsupport/api_level.h>
25
26 namespace android {
27
getVNDKVersionFromProp(int defaultVersion)28 int getVNDKVersionFromProp(int defaultVersion) {
29 int vendorApiLevel = AVendorSupport_getVendorApiLevel();
30 if (vendorApiLevel == 0) {
31 // Couldn't find vendor API level, return default
32 return defaultVersion;
33 }
34
35 // Vendor API level for Android V and above are of the format YYYYMM starting with 202404.
36 // AVendorSupport_getSdkApiLevelOf maps them back to SDK API levels while leaving older
37 // values unchanged.
38 return AVendorSupport_getSdkApiLevelOf(vendorApiLevel);
39 }
40
RunThreadWithRealtimePriority(int tid)41 RunThreadWithRealtimePriority::RunThreadWithRealtimePriority(int tid)
42 : mTid(tid), mPreviousPolicy(sched_getscheduler(tid)) {
43 auto res = sched_getparam(mTid, &mPreviousParams);
44 if (res != OK) {
45 ALOGE("Can't retrieve thread scheduler parameters: %s (%d)", strerror(-res), res);
46 return;
47 }
48
49 struct sched_param param = {0};
50 param.sched_priority = kRequestThreadPriority;
51
52 res = sched_setscheduler(mTid, SCHED_FIFO, ¶m);
53 if (res != OK) {
54 ALOGW("Can't set realtime priority for thread: %s (%d)", strerror(-res), res);
55 } else {
56 ALOGD("Set real time priority for thread (tid %d)", mTid);
57 mPolicyBumped = true;
58 }
59 }
60
~RunThreadWithRealtimePriority()61 RunThreadWithRealtimePriority::~RunThreadWithRealtimePriority() {
62 if (mPolicyBumped) {
63 auto res = sched_setscheduler(mTid, mPreviousPolicy, &mPreviousParams);
64 if (res != OK) {
65 ALOGE("Can't set regular priority for thread: %s (%d)", strerror(-res), res);
66 } else {
67 ALOGD("Set regular priority for thread (tid %d)", mTid);
68 }
69 }
70 }
71
72 } // namespace android
73