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 #include "AudioToken.h"
18 #define LOG_TAG "AudioPowerManager"
19 #include <com_android_media_audioserver.h>
20 #include <cutils/properties.h>
21 #include <utils/Log.h>
22 #include <psh_utils/AudioPowerManager.h>
23
24 namespace android::media::psh_utils {
25
26 /* static */
getAudioPowerManager()27 AudioPowerManager& AudioPowerManager::getAudioPowerManager() {
28 [[clang::no_destroy]] static AudioPowerManager apm;
29 return apm;
30 }
31
startClient(pid_t pid,uid_t uid,const std::string & additional)32 std::unique_ptr<Token> AudioPowerManager::startClient(pid_t pid, uid_t uid,
33 const std::string& additional) {
34 std::shared_ptr<PowerClientStats> powerClientStats;
35 std::lock_guard l(mMutex);
36 if (mPowerClientStats.count(uid) == 0) {
37 const auto it = mHistoricalClients.find(uid);
38 if (it == mHistoricalClients.end()) {
39 powerClientStats = std::make_shared<PowerClientStats>(uid, additional);
40 } else {
41 powerClientStats = it->second;
42 mHistoricalClients.erase(it);
43 }
44 mPowerClientStats[uid] = powerClientStats;
45 } else {
46 powerClientStats = mPowerClientStats[uid];
47 }
48 powerClientStats->addPid(pid);
49 mPidToUid[pid] = uid;
50 std::unique_ptr<Token> token =
51 std::make_unique<AudioClientToken>(powerClientStats, pid, uid, additional);
52 mOutstandingTokens.emplace(token.get());
53 return token;
54 }
55
startTrack(uid_t uid,const std::string & additional)56 std::unique_ptr<Token> AudioPowerManager::startTrack(uid_t uid, const std::string& additional) {
57 std::lock_guard l(mMutex);
58 if (mPowerClientStats.count(uid) == 0) {
59 ALOGW("%s: Cannot find uid: %d", __func__, uid);
60 return {};
61 }
62 auto powerClientStats = mPowerClientStats[uid];
63 std::unique_ptr<Token> token =
64 std::make_unique<AudioTrackToken>(powerClientStats, additional);
65 mOutstandingTokens.emplace(token.get());
66 return token;
67 }
68
startThread(pid_t pid,const std::string & wakeLockName,WakeFlag wakeFlag,const std::string & additional)69 std::unique_ptr<Token> AudioPowerManager::startThread(
70 pid_t pid, const std::string& wakeLockName,
71 WakeFlag wakeFlag, const std::string& additional) {
72 std::lock_guard l(mMutex);
73 std::unique_ptr<Token> token =
74 std::make_unique<AudioThreadToken>(pid, wakeLockName, wakeFlag, additional);
75 mOutstandingTokens.emplace(token.get());
76 return token;
77 }
78
toString() const79 std::string AudioPowerManager::toString() const {
80 const std::string prefix(" ");
81 std::string result;
82 std::lock_guard l(mMutex);
83 result.append("Power Tokens:\n");
84 std::vector<std::string> tokenInfo;
85 for (const auto& token: mOutstandingTokens) {
86 tokenInfo.emplace_back(token->toString());
87 }
88 std::sort(tokenInfo.begin(), tokenInfo.end());
89 for (const auto& info: tokenInfo) {
90 result.append(prefix).append(info).append("\n");
91 }
92 result.append("Power Clients:\n");
93 for (const auto& [uid, powerClientStats]: mPowerClientStats) {
94 result.append(powerClientStats->toString(true, prefix));
95 }
96 result.append("Power Client History:\n");
97 for (const auto& [power, powerClientStats]: mHistoricalClients) {
98 result.append(powerClientStats->toString(true, prefix));
99 }
100 return result;
101 }
102
stopClient(pid_t pid)103 void AudioPowerManager::stopClient(pid_t pid) {
104 std::lock_guard l(mMutex);
105 const auto pidit = mPidToUid.find(pid);
106 if (pidit == mPidToUid.end()) return;
107 const uid_t uid = pidit->second;
108 const auto it = mPowerClientStats.find(uid);
109 if (it == mPowerClientStats.end()) return;
110
111 auto powerClientStats = it->second;
112 size_t count = powerClientStats->removePid(pid);
113 if (count == 0) {
114 mHistoricalClients[uid] = powerClientStats;
115 mPowerClientStats.erase(it);
116 if (mHistoricalClients.size() > kHistory) {
117 mHistoricalClients.erase(mHistoricalClients.begin()); // remove oldest.
118 }
119 }
120 mPidToUid.erase(pid);
121 }
122
clear_token_ptr(Token * token)123 void AudioPowerManager::clear_token_ptr(Token* token) {
124 if (token != nullptr) {
125 std::lock_guard l(mMutex);
126 (void)mOutstandingTokens.erase(token);
127 }
128 }
129
130 /* static */
enabled()131 bool AudioPowerManager::enabled() {
132 static const bool enabled = com::android::media::audioserver::power_stats()
133 && property_get_bool("persist.audio.power_stats.enabled", false);
134 return enabled;
135 }
136
137 } // namespace android::media::psh_utils
138