1 /*
2  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef MODULES_AUDIO_DEVICE_ANDROID_BUILD_INFO_H_
12 #define MODULES_AUDIO_DEVICE_ANDROID_BUILD_INFO_H_
13 
14 #include <jni.h>
15 #include <memory>
16 #include <string>
17 
18 #include "modules/utility/include/jvm_android.h"
19 
20 namespace webrtc {
21 
22 // This enumeration maps to the values returned by BuildInfo::GetSdkVersion(),
23 // indicating the Android release associated with a given SDK version.
24 // See https://developer.android.com/guide/topics/manifest/uses-sdk-element.html
25 // for details.
26 enum SdkCode {
27   SDK_CODE_JELLY_BEAN = 16,      // Android 4.1
28   SDK_CODE_JELLY_BEAN_MR1 = 17,  // Android 4.2
29   SDK_CODE_JELLY_BEAN_MR2 = 18,  // Android 4.3
30   SDK_CODE_KITKAT = 19,          // Android 4.4
31   SDK_CODE_WATCH = 20,           // Android 4.4W
32   SDK_CODE_LOLLIPOP = 21,        // Android 5.0
33   SDK_CODE_LOLLIPOP_MR1 = 22,    // Android 5.1
34   SDK_CODE_MARSHMALLOW = 23,     // Android 6.0
35   SDK_CODE_N = 24,
36 };
37 
38 // Utility class used to query the Java class (org/webrtc/voiceengine/BuildInfo)
39 // for device and Android build information.
40 // The calling thread is attached to the JVM at construction if needed and a
41 // valid Java environment object is also created.
42 // All Get methods must be called on the creating thread. If not, the code will
43 // hit RTC_DCHECKs when calling JNIEnvironment::JavaToStdString().
44 class BuildInfo {
45  public:
46   BuildInfo();
~BuildInfo()47   ~BuildInfo() {}
48 
49   // End-user-visible name for the end product (e.g. "Nexus 6").
50   std::string GetDeviceModel();
51   // Consumer-visible brand (e.g. "google").
52   std::string GetBrand();
53   // Manufacturer of the product/hardware (e.g. "motorola").
54   std::string GetDeviceManufacturer();
55   // Android build ID (e.g. LMY47D).
56   std::string GetAndroidBuildId();
57   // The type of build (e.g. "user" or "eng").
58   std::string GetBuildType();
59   // The user-visible version string (e.g. "5.1").
60   std::string GetBuildRelease();
61   // The user-visible SDK version of the framework (e.g. 21). See SdkCode enum
62   // for translation.
63   SdkCode GetSdkVersion();
64 
65  private:
66   // Helper method which calls a static getter method with |name| and returns
67   // a string from Java.
68   std::string GetStringFromJava(const char* name);
69 
70   // Ensures that this class can access a valid JNI interface pointer even
71   // if the creating thread was not attached to the JVM.
72   AttachCurrentThreadIfNeeded attach_thread_if_needed_;
73 
74   // Provides access to the JNIEnv interface pointer and the JavaToStdString()
75   // method which is used to translate Java strings to std strings.
76   std::unique_ptr<JNIEnvironment> j_environment_;
77 
78   // Holds the jclass object and provides access to CallStaticObjectMethod().
79   // Used by GetStringFromJava() during construction only.
80   JavaClass j_build_info_;
81 };
82 
83 }  // namespace webrtc
84 
85 #endif  // MODULES_AUDIO_DEVICE_ANDROID_BUILD_INFO_H_
86