3 ** Copyright 2013, The Android Open Source Project
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
9 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
18 // #define LOG_NDEBUG 0
19 #define LOG_TAG "CameraMetadata-JNI"
20 #include <utils/Errors.h>
21 #include <utils/Log.h>
22 #include <utils/RefBase.h>
23 #include <utils/Vector.h>
24 #include <utils/SortedVector.h>
25 #include <utils/KeyedVector.h>
32 #include "android_os_Parcel.h"
33 #include "core_jni_helpers.h"
34 #include "android_runtime/android_hardware_camera2_CameraMetadata.h"
36 #include <android/hardware/ICameraService.h>
37 #include <binder/IServiceManager.h>
38 #include <camera/CameraMetadata.h>
39 #include <camera/VendorTagDescriptor.h>
40 #include <nativehelper/ScopedUtfChars.h>
41 #include <nativehelper/ScopedPrimitiveArray.h>
43 #include <sys/types.h> // for socketpair
44 #include <sys/socket.h> // for socketpair
46 static const bool kIsDebug = false;
48 // fully-qualified class name
49 #define CAMERA_METADATA_CLASS_NAME "android/hardware/camera2/impl/CameraMetadataNative"
50 #define CHARACTERISTICS_KEY_CLASS_NAME "android/hardware/camera2/CameraCharacteristics$Key"
51 #define REQUEST_KEY_CLASS_NAME "android/hardware/camera2/CaptureRequest$Key"
52 #define RESULT_KEY_CLASS_NAME "android/hardware/camera2/CaptureResult$Key"
54 using namespace android;
56 static struct metadata_java_key_offsets_t {
57 jclass mCharacteristicsKey;
60 jmethodID mCharacteristicsConstr;
61 jmethodID mResultConstr;
62 jmethodID mRequestConstr;
68 jclass mRationalArray;
70 jmethodID mArrayListConstr;
71 jmethodID mArrayListAdd;
75 jfieldID metadata_ptr;
78 static fields_t fields;
82 status_t CameraMetadata_getNativeMetadata(JNIEnv* env, jobject thiz,
83 /*out*/CameraMetadata* metadata) {
85 ALOGE("%s: Invalid java metadata object.", __FUNCTION__);
90 ALOGE("%s: Invalid output metadata object.", __FUNCTION__);
93 CameraMetadata* nativePtr = reinterpret_cast<CameraMetadata*>(env->GetLongField(thiz,
94 fields.metadata_ptr));
95 if (nativePtr == NULL) {
96 ALOGE("%s: Invalid native pointer in java metadata object.", __FUNCTION__);
99 *metadata = *nativePtr;
103 } /*namespace android*/
107 static size_t getTypeSize(uint8_t type) {
108 if (type >= NUM_TYPES) {
109 ALOGE("%s: Invalid type specified (%ud)", __FUNCTION__, type);
110 return static_cast<size_t>(-1);
113 return camera_metadata_type_size[type];
116 static status_t updateAny(CameraMetadata *metadata,
122 if (type >= NUM_TYPES) {
123 ALOGE("%s: Invalid type specified (%ud)", __FUNCTION__, type);
124 return INVALID_OPERATION;
127 size_t typeSize = getTypeSize(type);
129 if (dataBytes % typeSize != 0) {
130 ALOGE("%s: Expected dataBytes (%zu) to be divisible by typeSize "
131 "(%zu)", __FUNCTION__, dataBytes, typeSize);
135 size_t dataCount = dataBytes / typeSize;
138 #define METADATA_UPDATE(runtime_type, compile_type) \
139 case runtime_type: { \
140 const compile_type *dataPtr = \
141 static_cast<const compile_type*>(data); \
142 return metadata->update(tag, dataPtr, dataCount); \
145 METADATA_UPDATE(TYPE_BYTE, uint8_t);
146 METADATA_UPDATE(TYPE_INT32, int32_t);
147 METADATA_UPDATE(TYPE_FLOAT, float);
148 METADATA_UPDATE(TYPE_INT64, int64_t);
149 METADATA_UPDATE(TYPE_DOUBLE, double);
150 METADATA_UPDATE(TYPE_RATIONAL, camera_metadata_rational_t);
154 ALOGE("%s: Unreachable", __FUNCTION__);
155 return INVALID_OPERATION;
159 #undef METADATA_UPDATE
166 static void CameraMetadata_classInit(JNIEnv *env, jobject thiz);
167 static jobject CameraMetadata_getAllVendorKeys(JNIEnv* env, jobject thiz, jclass keyType);
168 static jint CameraMetadata_getTagFromKey(JNIEnv *env, jobject thiz, jstring keyName);
169 static jint CameraMetadata_getTypeFromTag(JNIEnv *env, jobject thiz, jint tag);
170 static jint CameraMetadata_setupGlobalVendorTagDescriptor(JNIEnv *env, jobject thiz);
172 // Less safe access to native pointer. Does NOT throw any Java exceptions if NULL.
173 static CameraMetadata* CameraMetadata_getPointerNoThrow(JNIEnv *env, jobject thiz) {
179 return reinterpret_cast<CameraMetadata*>(env->GetLongField(thiz, fields.metadata_ptr));
182 // Safe access to native pointer from object. Throws if not possible to access.
183 static CameraMetadata* CameraMetadata_getPointerThrow(JNIEnv *env, jobject thiz,
184 const char* argName = "this") {
187 ALOGV("%s: Throwing java.lang.NullPointerException for null reference",
189 jniThrowNullPointerException(env, argName);
193 CameraMetadata* metadata = CameraMetadata_getPointerNoThrow(env, thiz);
194 if (metadata == NULL) {
195 ALOGV("%s: Throwing java.lang.IllegalStateException for closed object",
197 jniThrowException(env, "java/lang/IllegalStateException",
198 "Metadata object was already closed");
205 static jlong CameraMetadata_allocate(JNIEnv *env, jobject thiz) {
206 ALOGV("%s", __FUNCTION__);
208 return reinterpret_cast<jlong>(new CameraMetadata());
211 static jlong CameraMetadata_allocateCopy(JNIEnv *env, jobject thiz,
213 ALOGV("%s", __FUNCTION__);
215 CameraMetadata* otherMetadata =
216 CameraMetadata_getPointerThrow(env, other, "other");
218 // In case of exception, return
219 if (otherMetadata == NULL) return NULL;
221 // Clone native metadata and return new pointer
222 return reinterpret_cast<jlong>(new CameraMetadata(*otherMetadata));
226 static jboolean CameraMetadata_isEmpty(JNIEnv *env, jobject thiz) {
227 ALOGV("%s", __FUNCTION__);
229 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
231 if (metadata == NULL) {
232 ALOGW("%s: Returning early due to exception being thrown",
234 return JNI_TRUE; // actually throws java exc.
237 jboolean empty = metadata->isEmpty();
239 ALOGV("%s: Empty returned %d, entry count was %zu",
240 __FUNCTION__, empty, metadata->entryCount());
245 static jint CameraMetadata_getEntryCount(JNIEnv *env, jobject thiz) {
246 ALOGV("%s", __FUNCTION__);
248 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
250 if (metadata == NULL) return 0; // actually throws java exc.
252 return metadata->entryCount();
255 // idempotent. calling more than once has no effect.
256 static void CameraMetadata_close(JNIEnv *env, jobject thiz) {
257 ALOGV("%s", __FUNCTION__);
259 CameraMetadata* metadata = CameraMetadata_getPointerNoThrow(env, thiz);
261 if (metadata != NULL) {
263 env->SetLongField(thiz, fields.metadata_ptr, 0);
266 LOG_ALWAYS_FATAL_IF(CameraMetadata_getPointerNoThrow(env, thiz) != NULL,
267 "Expected the native ptr to be 0 after #close");
270 static void CameraMetadata_swap(JNIEnv *env, jobject thiz, jobject other) {
271 ALOGV("%s", __FUNCTION__);
273 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
275 // order is important: we can't call another JNI method
276 // if there is an exception pending
277 if (metadata == NULL) return;
279 CameraMetadata* otherMetadata = CameraMetadata_getPointerThrow(env, other, "other");
281 if (otherMetadata == NULL) return;
283 metadata->swap(*otherMetadata);
286 static jbyteArray CameraMetadata_readValues(JNIEnv *env, jobject thiz, jint tag) {
287 ALOGV("%s (tag = %d)", __FUNCTION__, tag);
289 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
290 if (metadata == NULL) return NULL;
292 int tagType = get_camera_metadata_tag_type(tag);
294 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
295 "Tag (%d) did not have a type", tag);
298 size_t tagSize = Helpers::getTypeSize(tagType);
300 camera_metadata_entry entry = metadata->find(tag);
301 if (entry.count == 0) {
302 if (!metadata->exists(tag)) {
303 ALOGV("%s: Tag %d does not have any entries", __FUNCTION__, tag);
306 // OK: we will return a 0-sized array.
307 ALOGV("%s: Tag %d had an entry, but it had 0 data", __FUNCTION__,
312 jsize byteCount = entry.count * tagSize;
313 jbyteArray byteArray = env->NewByteArray(byteCount);
314 if (env->ExceptionCheck()) return NULL;
316 // Copy into java array from native array
317 ScopedByteArrayRW arrayWriter(env, byteArray);
318 memcpy(arrayWriter.get(), entry.data.u8, byteCount);
323 static void CameraMetadata_writeValues(JNIEnv *env, jobject thiz, jint tag, jbyteArray src) {
324 ALOGV("%s (tag = %d)", __FUNCTION__, tag);
326 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
327 if (metadata == NULL) return;
329 int tagType = get_camera_metadata_tag_type(tag);
331 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
332 "Tag (%d) did not have a type", tag);
339 // If array is NULL, delete the entry
340 if (metadata->exists(tag)) {
341 res = metadata->erase(tag);
342 ALOGV("%s: Erase values (res = %d)", __FUNCTION__, res);
345 ALOGV("%s: Don't need to erase", __FUNCTION__);
348 // Copy from java array into native array
349 ScopedByteArrayRO arrayReader(env, src);
350 if (arrayReader.get() == NULL) return;
352 res = Helpers::updateAny(metadata, static_cast<uint32_t>(tag),
353 tagType, arrayReader.get(), arrayReader.size());
355 ALOGV("%s: Update values (res = %d)", __FUNCTION__, res);
360 } else if (res == BAD_VALUE) {
361 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
362 "Src byte array was poorly formed");
363 } else if (res == INVALID_OPERATION) {
364 jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
365 "Internal error while trying to update metadata");
367 jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
368 "Unknown error (%d) while trying to update "
373 struct DumpMetadataParams {
375 const CameraMetadata* metadata;
378 static void* CameraMetadata_writeMetadataThread(void* arg) {
379 DumpMetadataParams* p = static_cast<DumpMetadataParams*>(arg);
382 * Write the dumped data, and close the writing side FD.
384 p->metadata->dump(p->writeFd, /*verbosity*/2);
386 if (close(p->writeFd) < 0) {
387 ALOGE("%s: Failed to close writeFd (errno = %#x, message = '%s')",
388 __FUNCTION__, errno, strerror(errno));
394 static void CameraMetadata_dump(JNIEnv *env, jobject thiz) {
395 ALOGV("%s", __FUNCTION__);
396 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
397 if (metadata == NULL) {
402 * Create a socket pair for local streaming read/writes.
404 * The metadata will be dumped into the write side,
405 * and then read back out (and logged) via the read side.
412 if (socketpair(AF_LOCAL, SOCK_STREAM, /*protocol*/0, &sv[0]) < 0) {
413 jniThrowExceptionFmt(env, "java/io/IOException",
414 "Failed to create socketpair (errno = %#x, message = '%s')",
415 errno, strerror(errno));
423 * Create a thread for doing the writing.
425 * The reading and writing must be concurrent, otherwise
426 * the write will block forever once it exhausts the capped
427 * buffer size (from getsockopt).
429 pthread_t writeThread;
430 DumpMetadataParams params = {
436 int threadRet = pthread_create(&writeThread, /*attr*/NULL,
437 CameraMetadata_writeMetadataThread, (void*)¶ms);
439 if (threadRet != 0) {
442 jniThrowExceptionFmt(env, "java/io/IOException",
443 "Failed to create thread for writing (errno = %#x, message = '%s')",
444 threadRet, strerror(threadRet));
449 * Read out a byte until stream is complete. Write completed lines
453 char out[] = {'\0', '\0'}; // large enough to append as a string
456 // Read one byte at a time! Very slow but avoids complicated \n scanning.
458 while ((res = TEMP_FAILURE_RETRY(read(readFd, &out[0], /*count*/1))) > 0) {
459 if (out[0] == '\n') {
460 ALOGD("%s", logLine.string());
468 jniThrowExceptionFmt(env, "java/io/IOException",
469 "Failed to read from fd (errno = %#x, message = '%s')",
470 errno, strerror(errno));
472 } else if (!logLine.isEmpty()) {
473 ALOGD("%s", logLine.string());
479 // Join until thread finishes. Ensures params/metadata is valid until then.
480 if ((res = pthread_join(writeThread, /*retval*/NULL)) != 0) {
481 ALOGE("%s: Failed to join thread (errno = %#x, message = '%s')",
482 __FUNCTION__, res, strerror(res));
486 static void CameraMetadata_readFromParcel(JNIEnv *env, jobject thiz, jobject parcel) {
487 ALOGV("%s", __FUNCTION__);
488 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
489 if (metadata == NULL) {
493 Parcel* parcelNative = parcelForJavaObject(env, parcel);
494 if (parcelNative == NULL) {
495 jniThrowNullPointerException(env, "parcel");
500 if ((err = metadata->readFromParcel(parcelNative)) != OK) {
501 jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
502 "Failed to read from parcel (error code %d)", err);
507 static void CameraMetadata_writeToParcel(JNIEnv *env, jobject thiz, jobject parcel) {
508 ALOGV("%s", __FUNCTION__);
509 CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
510 if (metadata == NULL) {
514 Parcel* parcelNative = parcelForJavaObject(env, parcel);
515 if (parcelNative == NULL) {
516 jniThrowNullPointerException(env, "parcel");
521 if ((err = metadata->writeToParcel(parcelNative)) != OK) {
522 jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
523 "Failed to write to parcel (error code %d)", err);
530 //-------------------------------------------------
532 static const JNINativeMethod gCameraMetadataMethods[] = {
536 (void *)CameraMetadata_classInit },
537 { "nativeGetAllVendorKeys",
538 "(Ljava/lang/Class;)Ljava/util/ArrayList;",
539 (void *)CameraMetadata_getAllVendorKeys},
540 { "nativeGetTagFromKey",
541 "(Ljava/lang/String;)I",
542 (void *)CameraMetadata_getTagFromKey },
543 { "nativeGetTypeFromTag",
545 (void *)CameraMetadata_getTypeFromTag },
546 { "nativeSetupGlobalVendorTagDescriptor",
548 (void*)CameraMetadata_setupGlobalVendorTagDescriptor },
552 (void*)CameraMetadata_allocate },
553 { "nativeAllocateCopy",
554 "(L" CAMERA_METADATA_CLASS_NAME ";)J",
555 (void *)CameraMetadata_allocateCopy },
558 (void*)CameraMetadata_isEmpty },
559 { "nativeGetEntryCount",
561 (void*)CameraMetadata_getEntryCount },
564 (void*)CameraMetadata_close },
566 "(L" CAMERA_METADATA_CLASS_NAME ";)V",
567 (void *)CameraMetadata_swap },
568 { "nativeReadValues",
570 (void *)CameraMetadata_readValues },
571 { "nativeWriteValues",
573 (void *)CameraMetadata_writeValues },
576 (void *)CameraMetadata_dump },
577 // Parcelable interface
578 { "nativeReadFromParcel",
579 "(Landroid/os/Parcel;)V",
580 (void *)CameraMetadata_readFromParcel },
581 { "nativeWriteToParcel",
582 "(Landroid/os/Parcel;)V",
583 (void *)CameraMetadata_writeToParcel },
587 const char *class_name;
588 const char *field_name;
589 const char *field_type;
593 static int find_fields(JNIEnv *env, field *fields, int count)
595 for (int i = 0; i < count; i++) {
596 field *f = &fields[i];
597 jclass clazz = env->FindClass(f->class_name);
599 ALOGE("Can't find %s", f->class_name);
603 jfieldID field = env->GetFieldID(clazz, f->field_name, f->field_type);
605 ALOGE("Can't find %s.%s", f->class_name, f->field_name);
609 *(f->jfield) = field;
615 // Get all the required offsets in java class and register native functions
616 int register_android_hardware_camera2_CameraMetadata(JNIEnv *env)
619 // Store global references to Key-related classes and methods used natively
620 jclass characteristicsKeyClazz = FindClassOrDie(env, CHARACTERISTICS_KEY_CLASS_NAME);
621 jclass requestKeyClazz = FindClassOrDie(env, REQUEST_KEY_CLASS_NAME);
622 jclass resultKeyClazz = FindClassOrDie(env, RESULT_KEY_CLASS_NAME);
623 gMetadataOffsets.mCharacteristicsKey = MakeGlobalRefOrDie(env, characteristicsKeyClazz);
624 gMetadataOffsets.mRequestKey = MakeGlobalRefOrDie(env, requestKeyClazz);
625 gMetadataOffsets.mResultKey = MakeGlobalRefOrDie(env, resultKeyClazz);
626 gMetadataOffsets.mCharacteristicsConstr = GetMethodIDOrDie(env,
627 gMetadataOffsets.mCharacteristicsKey, "<init>",
628 "(Ljava/lang/String;Ljava/lang/Class;)V");
629 gMetadataOffsets.mRequestConstr = GetMethodIDOrDie(env,
630 gMetadataOffsets.mRequestKey, "<init>", "(Ljava/lang/String;Ljava/lang/Class;)V");
631 gMetadataOffsets.mResultConstr = GetMethodIDOrDie(env,
632 gMetadataOffsets.mResultKey, "<init>", "(Ljava/lang/String;Ljava/lang/Class;)V");
634 // Store global references for primitive array types used by Keys
635 jclass byteClazz = FindClassOrDie(env, "[B");
636 jclass int32Clazz = FindClassOrDie(env, "[I");
637 jclass floatClazz = FindClassOrDie(env, "[F");
638 jclass int64Clazz = FindClassOrDie(env, "[J");
639 jclass doubleClazz = FindClassOrDie(env, "[D");
640 jclass rationalClazz = FindClassOrDie(env, "[Landroid/util/Rational;");
641 gMetadataOffsets.mByteArray = MakeGlobalRefOrDie(env, byteClazz);
642 gMetadataOffsets.mInt32Array = MakeGlobalRefOrDie(env, int32Clazz);
643 gMetadataOffsets.mFloatArray = MakeGlobalRefOrDie(env, floatClazz);
644 gMetadataOffsets.mInt64Array = MakeGlobalRefOrDie(env, int64Clazz);
645 gMetadataOffsets.mDoubleArray = MakeGlobalRefOrDie(env, doubleClazz);
646 gMetadataOffsets.mRationalArray = MakeGlobalRefOrDie(env, rationalClazz);
648 // Store global references for ArrayList methods used
649 jclass arrayListClazz = FindClassOrDie(env, "java/util/ArrayList");
650 gMetadataOffsets.mArrayList = MakeGlobalRefOrDie(env, arrayListClazz);
651 gMetadataOffsets.mArrayListConstr = GetMethodIDOrDie(env, gMetadataOffsets.mArrayList,
653 gMetadataOffsets.mArrayListAdd = GetMethodIDOrDie(env, gMetadataOffsets.mArrayList,
654 "add", "(Ljava/lang/Object;)Z");
656 // Register native functions
657 return RegisterMethodsOrDie(env,
658 CAMERA_METADATA_CLASS_NAME,
659 gCameraMetadataMethods,
660 NELEM(gCameraMetadataMethods));
665 static void CameraMetadata_classInit(JNIEnv *env, jobject thiz) {
666 // XX: Why do this separately instead of doing it in the register function?
667 ALOGV("%s", __FUNCTION__);
669 field fields_to_find[] = {
670 { CAMERA_METADATA_CLASS_NAME, "mMetadataPtr", "J", &fields.metadata_ptr },
673 // Do this here instead of in register_native_methods,
674 // since otherwise it will fail to find the fields.
675 if (find_fields(env, fields_to_find, NELEM(fields_to_find)) < 0)
678 env->FindClass(CAMERA_METADATA_CLASS_NAME);
681 static jobject CameraMetadata_getAllVendorKeys(JNIEnv* env, jobject thiz, jclass keyType) {
683 // Get all vendor tags
684 sp<VendorTagDescriptor> vTags = VendorTagDescriptor::getGlobalVendorTagDescriptor();
685 if (vTags.get() == nullptr) {
690 int count = vTags->getTagCount();
696 std::vector<uint32_t> tagIds(count, /*initializer value*/0);
697 vTags->getTagArray(&tagIds[0]);
699 // Which key class/constructor should we use?
702 if (env->IsSameObject(keyType, gMetadataOffsets.mCharacteristicsKey)) {
703 keyClazz = gMetadataOffsets.mCharacteristicsKey;
704 keyConstr = gMetadataOffsets.mCharacteristicsConstr;
705 } else if (env->IsSameObject(keyType, gMetadataOffsets.mResultKey)) {
706 keyClazz = gMetadataOffsets.mResultKey;
707 keyConstr = gMetadataOffsets.mResultConstr;
708 } else if (env->IsSameObject(keyType, gMetadataOffsets.mRequestKey)) {
709 keyClazz = gMetadataOffsets.mRequestKey;
710 keyConstr = gMetadataOffsets.mRequestConstr;
712 jniThrowException(env, "java/lang/IllegalArgumentException",
713 "Invalid key class given as argument.");
717 // Allocate arrayList to return
718 jobject arrayList = env->NewObject(gMetadataOffsets.mArrayList,
719 gMetadataOffsets.mArrayListConstr, static_cast<jint>(count));
720 if (env->ExceptionCheck()) {
724 for (uint32_t id : tagIds) {
725 const char* section = vTags->getSectionName(id);
726 const char* tag = vTags->getTagName(id);
727 int type = vTags->getTagType(id);
729 size_t totalLen = strlen(section) + strlen(tag) + 2;
730 std::vector<char> fullName(totalLen, 0);
731 snprintf(&fullName[0], totalLen, "%s.%s", section, tag);
733 jstring name = env->NewStringUTF(&fullName[0]);
735 if (env->ExceptionCheck()) {
742 valueClazz = gMetadataOffsets.mByteArray;
745 valueClazz = gMetadataOffsets.mInt32Array;
748 valueClazz = gMetadataOffsets.mFloatArray;
751 valueClazz = gMetadataOffsets.mInt64Array;
754 valueClazz = gMetadataOffsets.mDoubleArray;
757 valueClazz = gMetadataOffsets.mRationalArray;
760 jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
761 "Invalid type %d given for key %s", type, &fullName[0]);
765 jobject key = env->NewObject(keyClazz, keyConstr, name, valueClazz);
766 if (env->ExceptionCheck()) {
770 env->CallBooleanMethod(arrayList, gMetadataOffsets.mArrayListAdd, key);
771 if (env->ExceptionCheck()) {
775 env->DeleteLocalRef(name);
776 env->DeleteLocalRef(key);
782 static jint CameraMetadata_getTagFromKey(JNIEnv *env, jobject thiz, jstring keyName) {
784 ScopedUtfChars keyScoped(env, keyName);
785 const char *key = keyScoped.c_str();
787 // exception thrown by ScopedUtfChars
790 ALOGV("%s (key = '%s')", __FUNCTION__, key);
793 sp<VendorTagDescriptor> vTags =
794 VendorTagDescriptor::getGlobalVendorTagDescriptor();
795 status_t res = CameraMetadata::getTagFromName(key, vTags.get(), &tag);
797 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
798 "Could not find tag for key '%s')", key);
803 static jint CameraMetadata_getTypeFromTag(JNIEnv *env, jobject thiz, jint tag) {
804 int tagType = get_camera_metadata_tag_type(tag);
806 jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
807 "Tag (%d) did not have a type", tag);
814 static jint CameraMetadata_setupGlobalVendorTagDescriptor(JNIEnv *env, jobject thiz) {
815 const String16 NAME("media.camera");
816 sp<hardware::ICameraService> cameraService;
817 status_t err = getService(NAME, /*out*/&cameraService);
820 ALOGE("%s: Failed to get camera service, received error %s (%d)", __FUNCTION__,
821 strerror(-err), err);
822 return hardware::ICameraService::ERROR_DISCONNECTED;
825 sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
826 binder::Status res = cameraService->getCameraVendorTagDescriptor(/*out*/desc.get());
828 if (res.serviceSpecificErrorCode() == hardware::ICameraService::ERROR_DISCONNECTED) {
829 // No camera module available, not an error on devices with no cameras
830 VendorTagDescriptor::clearGlobalVendorTagDescriptor();
832 } else if (!res.isOk()) {
833 VendorTagDescriptor::clearGlobalVendorTagDescriptor();
834 ALOGE("%s: Failed to setup vendor tag descriptors: %s",
835 __FUNCTION__, res.toString8().string());
836 return res.serviceSpecificErrorCode();
839 err = VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
842 return hardware::ICameraService::ERROR_INVALID_OPERATION;