1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "android_graphics_HardwareRendererObserver.h"
#include "graphics_jni_helpers.h"
#include "nativehelper/jni_macros.h"
#include <array>
namespace android {
struct {
jclass clazz;
jmethodID callback;
} gHardwareRendererObserverClassInfo;
static JNIEnv* getenv(JavaVM* vm) {
JNIEnv* env;
if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
LOG_ALWAYS_FATAL("Failed to get JNIEnv for JavaVM: %p", vm);
}
return env;
}
HardwareRendererObserver::HardwareRendererObserver(JavaVM* vm, jobject observer,
bool waitForPresentTime)
: uirenderer::FrameMetricsObserver(waitForPresentTime), mVm(vm) {
mObserver = getenv(mVm)->NewGlobalRef(observer);
LOG_ALWAYS_FATAL_IF(mObserver == nullptr, "unable to create frame stats observer reference");
}
HardwareRendererObserver::~HardwareRendererObserver() {
JNIEnv* env = getenv(mVm);
env->DeleteGlobalRef(mObserver);
}
bool HardwareRendererObserver::getNextBuffer(JNIEnv* env, jlongArray metrics, int* dropCount) {
jsize bufferSize = env->GetArrayLength(reinterpret_cast<jarray>(metrics));
LOG_ALWAYS_FATAL_IF(bufferSize != HardwareRendererObserver::kBufferSize,
"Mismatched Java/Native FrameMetrics data format.");
FrameMetricsNotification& elem = mRingBuffer[mNextInQueue];
if (elem.hasData.load()) {
env->SetLongArrayRegion(metrics, 0, kBufferSize, elem.buffer);
*dropCount = elem.dropCount;
mNextInQueue = (mNextInQueue + 1) % kRingSize;
elem.hasData = false;
return true;
}
return false;
}
void HardwareRendererObserver::notify(const int64_t* stats) {
if (!mKeepListening) return;
FrameMetricsNotification& elem = mRingBuffer[mNextFree];
if (!elem.hasData.load()) {
memcpy(elem.buffer, stats, kBufferSize * sizeof(stats[0]));
elem.dropCount = mDroppedReports;
mDroppedReports = 0;
mNextFree = (mNextFree + 1) % kRingSize;
elem.hasData = true;
JNIEnv* env = getenv(mVm);
mKeepListening = env->CallStaticBooleanMethod(gHardwareRendererObserverClassInfo.clazz,
gHardwareRendererObserverClassInfo.callback,
mObserver);
} else {
mDroppedReports++;
}
}
static jlong android_graphics_HardwareRendererObserver_createObserver(JNIEnv* env,
jobject /*clazz*/,
jobject weakRefThis,
jboolean waitForPresentTime) {
JavaVM* vm = nullptr;
if (env->GetJavaVM(&vm) != JNI_OK) {
LOG_ALWAYS_FATAL("Unable to get Java VM");
return 0;
}
HardwareRendererObserver* observer =
new HardwareRendererObserver(vm, weakRefThis, waitForPresentTime);
return reinterpret_cast<jlong>(observer);
}
static jint android_graphics_HardwareRendererObserver_getNextBuffer(JNIEnv* env, jobject,
jlong observerPtr,
jlongArray metrics) {
HardwareRendererObserver* observer = reinterpret_cast<HardwareRendererObserver*>(observerPtr);
int dropCount = 0;
if (observer->getNextBuffer(env, metrics, &dropCount)) {
return dropCount;
} else {
return -1;
}
}
static const std::array gMethods = {
MAKE_JNI_NATIVE_METHOD("nCreateObserver", "(Ljava/lang/ref/WeakReference;Z)J",
android_graphics_HardwareRendererObserver_createObserver),
MAKE_JNI_NATIVE_METHOD("nGetNextBuffer", "(J[J)I",
android_graphics_HardwareRendererObserver_getNextBuffer),
};
int register_android_graphics_HardwareRendererObserver(JNIEnv* env) {
jclass observerClass = FindClassOrDie(env, "android/graphics/HardwareRendererObserver");
gHardwareRendererObserverClassInfo.clazz =
reinterpret_cast<jclass>(env->NewGlobalRef(observerClass));
gHardwareRendererObserverClassInfo.callback = GetStaticMethodIDOrDie(
env, observerClass, "invokeDataAvailable", "(Ljava/lang/ref/WeakReference;)Z");
return RegisterMethodsOrDie(env, "android/graphics/HardwareRendererObserver",
gMethods.data(), gMethods.size());
}
} // namespace android
|
