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
28 namespace flags = com::android::internal::camera::flags;
29
30 namespace {
31 constexpr const char* LEGACY_VNDK_VERSION_PROP = "ro.vndk.version";
32 constexpr const char* BOARD_API_LEVEL_PROP = "ro.board.api_level";
33 constexpr int MAX_VENDOR_API_LEVEL = 1000000;
34 constexpr int FIRST_VNDK_VERSION = 202404;
35
legacyGetVNDKVersionFromProp(int defaultVersion)36 int legacyGetVNDKVersionFromProp(int defaultVersion) {
37 if (!flags::use_ro_board_api_level_for_vndk_version()) {
38 return base::GetIntProperty(LEGACY_VNDK_VERSION_PROP, defaultVersion);
39 }
40
41 int vndkVersion = base::GetIntProperty(BOARD_API_LEVEL_PROP, MAX_VENDOR_API_LEVEL);
42
43 if (vndkVersion == MAX_VENDOR_API_LEVEL) {
44 // Couldn't find property
45 return defaultVersion;
46 }
47
48 if (vndkVersion < __ANDROID_API_V__) {
49 // VNDK versions below V return the corresponding SDK version.
50 return vndkVersion;
51 }
52
53 // VNDK for Android V and above are of the format YYYYMM starting with 202404 and is bumped
54 // up once a year. So V would be 202404 and the next one would be 202504.
55 // This is the same assumption as that made in system/core/init/property_service.cpp.
56 vndkVersion = (vndkVersion - FIRST_VNDK_VERSION) / 100;
57 return __ANDROID_API_V__ + vndkVersion;
58 }
59 } // anonymous namespace
60
getVNDKVersionFromProp(int defaultVersion)61 int getVNDKVersionFromProp(int defaultVersion) {
62 if (!flags::use_system_api_for_vndk_version()) {
63 return legacyGetVNDKVersionFromProp(defaultVersion);
64 }
65
66 int vendorApiLevel = AVendorSupport_getVendorApiLevel();
67 if (vendorApiLevel == 0) {
68 // Couldn't find vendor API level, return default
69 return defaultVersion;
70 }
71
72 // Vendor API level for Android V and above are of the format YYYYMM starting with 202404.
73 // AVendorSupport_getSdkApiLevelOf maps them back to SDK API levels while leaving older
74 // values unchanged.
75 return AVendorSupport_getSdkApiLevelOf(vendorApiLevel);
76 }
77
RunThreadWithRealtimePriority(int tid)78 RunThreadWithRealtimePriority::RunThreadWithRealtimePriority(int tid)
79 : mTid(tid), mPreviousPolicy(sched_getscheduler(tid)) {
80 if (flags::realtime_priority_bump()) {
81 auto res = sched_getparam(mTid, &mPreviousParams);
82 if (res != OK) {
83 ALOGE("Can't retrieve thread scheduler parameters: %s (%d)", strerror(-res), res);
84 return;
85 }
86
87 struct sched_param param = {0};
88 param.sched_priority = kRequestThreadPriority;
89
90 res = sched_setscheduler(mTid, SCHED_FIFO, ¶m);
91 if (res != OK) {
92 ALOGW("Can't set realtime priority for thread: %s (%d)", strerror(-res), res);
93 } else {
94 ALOGD("Set real time priority for thread (tid %d)", mTid);
95 mPolicyBumped = true;
96 }
97 }
98 }
99
~RunThreadWithRealtimePriority()100 RunThreadWithRealtimePriority::~RunThreadWithRealtimePriority() {
101 if (mPolicyBumped && flags::realtime_priority_bump()) {
102 auto res = sched_setscheduler(mTid, mPreviousPolicy, &mPreviousParams);
103 if (res != OK) {
104 ALOGE("Can't set regular priority for thread: %s (%d)", strerror(-res), res);
105 } else {
106 ALOGD("Set regular priority for thread (tid %d)", mTid);
107 }
108 }
109 }
110
111 } // namespace android
112