1 /*
2 * Copyright (C) 2015 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_NDEBUG 0
18 #define LOG_TAG "NdkCameraMetadata"
19 #define ATRACE_TAG ATRACE_TAG_CAMERA
20
21 #include <utils/Log.h>
22 #include <utils/Trace.h>
23
24 #include <camera/NdkCameraMetadata.h>
25 #include "impl/ACameraMetadata.h"
26
27 using namespace android;
28
29 #ifndef __ANDROID_VNDK__
30 namespace {
31
32 constexpr const char* android_hardware_camera2_CameraMetadata_jniClassName =
33 "android/hardware/camera2/CameraMetadata";
34 constexpr const char* android_hardware_camera2_CameraCharacteristics_jniClassName =
35 "android/hardware/camera2/CameraCharacteristics";
36 constexpr const char* android_hardware_camera2_CaptureResult_jniClassName =
37 "android/hardware/camera2/CaptureResult";
38
39 jclass android_hardware_camera2_CameraCharacteristics_clazz = nullptr;
40 jclass android_hardware_camera2_CaptureResult_clazz = nullptr;
41 jmethodID android_hardware_camera2_CameraMetadata_getNativeMetadataPtr = nullptr;
42
43 // Called at most once to initializes global variables used by JNI.
InitJni(JNIEnv * env)44 bool InitJni(JNIEnv* env) {
45 // From C++11 onward, static initializers are guaranteed to be executed at most once,
46 // even if called from multiple threads.
47 static bool ok = [env]() -> bool {
48 const jclass cameraMetadataClazz = env->FindClass(
49 android_hardware_camera2_CameraMetadata_jniClassName);
50 if (cameraMetadataClazz == nullptr) {
51 return false;
52 }
53 const jmethodID cameraMetadata_getNativeMetadataPtr =
54 env->GetMethodID(cameraMetadataClazz, "getNativeMetadataPtr", "()J");
55 if (cameraMetadata_getNativeMetadataPtr == nullptr) {
56 return false;
57 }
58
59 const jclass cameraCharacteristics_clazz = env->FindClass(
60 android_hardware_camera2_CameraCharacteristics_jniClassName);
61 if (cameraCharacteristics_clazz == nullptr) {
62 return false;
63 }
64
65 const jclass captureResult_clazz = env->FindClass(
66 android_hardware_camera2_CaptureResult_jniClassName);
67 if (captureResult_clazz == nullptr) {
68 return false;
69 }
70
71 android_hardware_camera2_CameraMetadata_getNativeMetadataPtr =
72 cameraMetadata_getNativeMetadataPtr;
73 android_hardware_camera2_CameraCharacteristics_clazz =
74 static_cast<jclass>(env->NewGlobalRef(cameraCharacteristics_clazz));
75 android_hardware_camera2_CaptureResult_clazz =
76 static_cast<jclass>(env->NewGlobalRef(captureResult_clazz));
77
78 return true;
79 }();
80 return ok;
81 }
82
83 // Given cameraMetadata, an instance of android.hardware.camera2.CameraMetadata, invokes
84 // cameraMetadata.getNativeMetadataPtr() and returns it as a std::shared_ptr<CameraMetadata>*.
CameraMetadata_getNativeMetadataPtr(JNIEnv * env,jobject cameraMetadata)85 std::shared_ptr<CameraMetadata>* CameraMetadata_getNativeMetadataPtr(JNIEnv* env,
86 jobject cameraMetadata) {
87 if (cameraMetadata == nullptr) {
88 ALOGE("%s: Invalid Java CameraMetadata object.", __FUNCTION__);
89 return nullptr;
90 }
91 jlong ret = env->CallLongMethod(cameraMetadata,
92 android_hardware_camera2_CameraMetadata_getNativeMetadataPtr);
93 return reinterpret_cast<std::shared_ptr<CameraMetadata>* >(ret);
94 }
95
96 } // namespace
97 #endif /* __ANDROID_VNDK__ */
98
99 EXPORT
ACameraMetadata_getConstEntry(const ACameraMetadata * acm,uint32_t tag,ACameraMetadata_const_entry * entry)100 camera_status_t ACameraMetadata_getConstEntry(
101 const ACameraMetadata* acm, uint32_t tag, ACameraMetadata_const_entry* entry) {
102 ATRACE_CALL();
103 if (acm == nullptr || entry == nullptr) {
104 ALOGE("%s: invalid argument! metadata %p, tag 0x%x, entry %p",
105 __FUNCTION__, acm, tag, entry);
106 return ACAMERA_ERROR_INVALID_PARAMETER;
107 }
108 return acm->getConstEntry(tag, entry);
109 }
110
111 EXPORT
ACameraMetadata_getAllTags(const ACameraMetadata * acm,int32_t * numTags,const uint32_t ** tags)112 camera_status_t ACameraMetadata_getAllTags(
113 const ACameraMetadata* acm, /*out*/int32_t* numTags, /*out*/const uint32_t** tags) {
114 ATRACE_CALL();
115 if (acm == nullptr || numTags == nullptr || tags == nullptr) {
116 ALOGE("%s: invalid argument! metadata %p, numTags %p, tags %p",
117 __FUNCTION__, acm, numTags, tags);
118 return ACAMERA_ERROR_INVALID_PARAMETER;
119 }
120 return acm->getTags(numTags, tags);
121 }
122
123 EXPORT
ACameraMetadata_copy(const ACameraMetadata * src)124 ACameraMetadata* ACameraMetadata_copy(const ACameraMetadata* src) {
125 ATRACE_CALL();
126 if (src == nullptr) {
127 ALOGE("%s: src is null!", __FUNCTION__);
128 return nullptr;
129 }
130 ACameraMetadata* copy = new ACameraMetadata(*src);
131 copy->incStrong(/*id=*/(void*) ACameraMetadata_copy);
132 return copy;
133 }
134
135 EXPORT
ACameraMetadata_free(ACameraMetadata * metadata)136 void ACameraMetadata_free(ACameraMetadata* metadata) {
137 ATRACE_CALL();
138 if (metadata != nullptr) {
139 metadata->decStrong((void*) ACameraMetadata_free);
140 }
141 }
142
143 EXPORT
ACameraMetadata_isLogicalMultiCamera(const ACameraMetadata * staticMetadata,size_t * numPhysicalCameras,const char * const ** physicalCameraIds)144 bool ACameraMetadata_isLogicalMultiCamera(const ACameraMetadata* staticMetadata,
145 /*out*/size_t* numPhysicalCameras, /*out*/const char*const** physicalCameraIds) {
146 ATRACE_CALL();
147 if (numPhysicalCameras == nullptr || physicalCameraIds == nullptr) {
148 ALOGE("%s: Invalid input: numPhysicalCameras %p, physicalCameraIds %p",
149 __FUNCTION__, numPhysicalCameras, physicalCameraIds);
150 return false;
151 }
152 if (staticMetadata == nullptr) {
153 ALOGE("%s: Invalid input: staticMetadata is null.", __FUNCTION__);
154 return false;
155 }
156
157 return staticMetadata->isLogicalMultiCamera(numPhysicalCameras, physicalCameraIds);
158 }
159
160 #ifndef __ANDROID_VNDK__
161 EXPORT
ACameraMetadata_fromCameraMetadata(JNIEnv * env,jobject cameraMetadata)162 ACameraMetadata* ACameraMetadata_fromCameraMetadata(JNIEnv* env, jobject cameraMetadata) {
163 ATRACE_CALL();
164
165 const bool ok = InitJni(env);
166 LOG_ALWAYS_FATAL_IF(!ok, "Failed to find CameraMetadata Java classes.");
167
168 if (cameraMetadata == nullptr) {
169 return nullptr;
170 }
171
172 ACameraMetadata::ACAMERA_METADATA_TYPE type;
173 if (env->IsInstanceOf(cameraMetadata,
174 android_hardware_camera2_CameraCharacteristics_clazz)) {
175 type = ACameraMetadata::ACM_CHARACTERISTICS;
176 } else if (env->IsInstanceOf(cameraMetadata,
177 android_hardware_camera2_CaptureResult_clazz)) {
178 type = ACameraMetadata::ACM_RESULT;
179 } else {
180 return nullptr;
181 }
182
183 auto sharedData = CameraMetadata_getNativeMetadataPtr(env, cameraMetadata);
184 ACameraMetadata* output = new ACameraMetadata(*sharedData, type);
185 output->incStrong(/*id=*/(void*) ACameraMetadata_fromCameraMetadata);
186 return output;
187 }
188 #endif /* __ANDROID_VNDK__ */
189