/*
**
** Copyright 2013, 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.
*/
// #define LOG_NDEBUG 0
#define LOG_TAG "CameraMetadata-JNI"
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/RefBase.h>
#include <utils/Vector.h>
#include <utils/SortedVector.h>
#include <utils/KeyedVector.h>
#include <stdio.h>
#include <string.h>
#include <vector>
#include "jni.h"
#include <nativehelper/JNIHelp.h>
#include "android_os_Parcel.h"
#include "core_jni_helpers.h"
#include "android_runtime/android_hardware_camera2_CameraMetadata.h"
#include <android/hardware/ICameraService.h>
#include <binder/IServiceManager.h>
#include <camera/CameraMetadata.h>
#include <camera_metadata_hidden.h>
#include <camera/VendorTagDescriptor.h>
#include <nativehelper/ScopedUtfChars.h>
#include <nativehelper/ScopedPrimitiveArray.h>
#include <sys/types.h> // for socketpair
#include <sys/socket.h> // for socketpair
// fully-qualified class name
#define CAMERA_METADATA_CLASS_NAME "android/hardware/camera2/impl/CameraMetadataNative"
#define CHARACTERISTICS_KEY_CLASS_NAME "android/hardware/camera2/CameraCharacteristics$Key"
#define REQUEST_KEY_CLASS_NAME "android/hardware/camera2/CaptureRequest$Key"
#define RESULT_KEY_CLASS_NAME "android/hardware/camera2/CaptureResult$Key"
using namespace android;
static struct metadata_java_key_offsets_t {
jclass mCharacteristicsKey;
jclass mResultKey;
jclass mRequestKey;
jmethodID mCharacteristicsConstr;
jmethodID mResultConstr;
jmethodID mRequestConstr;
jclass mByteArray;
jclass mInt32Array;
jclass mFloatArray;
jclass mInt64Array;
jclass mDoubleArray;
jclass mRationalArray;
jclass mArrayList;
jmethodID mArrayListConstr;
jmethodID mArrayListAdd;
} gMetadataOffsets;
struct fields_t {
jfieldID metadata_ptr;
};
static fields_t fields;
namespace android {
status_t CameraMetadata_getNativeMetadata(JNIEnv* env, jobject thiz,
/*out*/CameraMetadata* metadata) {
if (!thiz) {
ALOGE("%s: Invalid java metadata object.", __FUNCTION__);
return BAD_VALUE;
}
if (!metadata) {
ALOGE("%s: Invalid output metadata object.", __FUNCTION__);
return BAD_VALUE;
}
CameraMetadata* nativePtr = reinterpret_cast<CameraMetadata*>(env->GetLongField(thiz,
fields.metadata_ptr));
if (nativePtr == NULL) {
ALOGE("%s: Invalid native pointer in java metadata object.", __FUNCTION__);
return BAD_VALUE;
}
*metadata = *nativePtr;
return OK;
}
} /*namespace android*/
namespace {
struct Helpers {
static size_t getTypeSize(uint8_t type) {
if (type >= NUM_TYPES) {
ALOGE("%s: Invalid type specified (%ud)", __FUNCTION__, type);
return static_cast<size_t>(-1);
}
return camera_metadata_type_size[type];
}
static status_t updateAny(CameraMetadata *metadata,
uint32_t tag,
uint32_t type,
const void *data,
size_t dataBytes) {
if (type >= NUM_TYPES) {
ALOGE("%s: Invalid type specified (%ud)", __FUNCTION__, type);
return INVALID_OPERATION;
}
size_t typeSize = getTypeSize(type);
if (dataBytes % typeSize != 0) {
ALOGE("%s: Expected dataBytes (%zu) to be divisible by typeSize "
"(%zu)", __FUNCTION__, dataBytes, typeSize);
return BAD_VALUE;
}
size_t dataCount = dataBytes / typeSize;
switch(type) {
#define METADATA_UPDATE(runtime_type, compile_type) \
case runtime_type: { \
const compile_type *dataPtr = \
static_cast<const compile_type*>(data); \
return metadata->update(tag, dataPtr, dataCount); \
} \
METADATA_UPDATE(TYPE_BYTE, uint8_t);
METADATA_UPDATE(TYPE_INT32, int32_t);
METADATA_UPDATE(TYPE_FLOAT, float);
METADATA_UPDATE(TYPE_INT64, int64_t);
METADATA_UPDATE(TYPE_DOUBLE, double);
METADATA_UPDATE(TYPE_RATIONAL, camera_metadata_rational_t);
default: {
// unreachable
ALOGE("%s: Unreachable", __FUNCTION__);
return INVALID_OPERATION;
}
}
#undef METADATA_UPDATE
}
};
} // namespace {}
extern "C" {
static jobject CameraMetadata_getAllVendorKeys(JNIEnv* env, jobject thiz, jclass keyType);
static jint CameraMetadata_getTagFromKey(JNIEnv *env, jobject thiz, jstring keyName, jlong vendorId);
static jint CameraMetadata_getTagFromKeyLocal(JNIEnv *env, jobject thiz, jstring keyName);
static jint CameraMetadata_getTypeFromTag(JNIEnv *env, jobject thiz, jint tag, jlong vendorId);
static jint CameraMetadata_getTypeFromTagLocal(JNIEnv *env, jobject thiz, jint tag);
static jint CameraMetadata_setupGlobalVendorTagDescriptor(JNIEnv *env, jobject thiz);
// Less safe access to native pointer. Does NOT throw any Java exceptions if NULL.
static CameraMetadata* CameraMetadata_getPointerNoThrow(JNIEnv *env, jobject thiz) {
if (thiz == NULL) {
return NULL;
}
return reinterpret_cast<CameraMetadata*>(env->GetLongField(thiz, fields.metadata_ptr));
}
// Safe access to native pointer from object. Throws if not possible to access.
static CameraMetadata* CameraMetadata_getPointerThrow(JNIEnv *env, jobject thiz,
const char* argName = "this") {
if (thiz == NULL) {
ALOGV("%s: Throwing java.lang.NullPointerException for null reference",
__FUNCTION__);
jniThrowNullPointerException(env, argName);
return NULL;
}
CameraMetadata* metadata = CameraMetadata_getPointerNoThrow(env, thiz);
if (metadata == NULL) {
ALOGV("%s: Throwing java.lang.IllegalStateException for closed object",
__FUNCTION__);
jniThrowException(env, "java/lang/IllegalStateException",
"Metadata object was already closed");
return NULL;
}
return metadata;
}
static jlong CameraMetadata_allocate(JNIEnv *env, jobject thiz) {
ALOGV("%s", __FUNCTION__);
return reinterpret_cast<jlong>(new CameraMetadata());
}
static jlong CameraMetadata_allocateCopy(JNIEnv *env, jobject thiz,
jobject other) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* otherMetadata =
CameraMetadata_getPointerThrow(env, other, "other");
// In case of exception, return
if (otherMetadata == NULL) return NULL;
// Clone native metadata and return new pointer
return reinterpret_cast<jlong>(new CameraMetadata(*otherMetadata));
}
static jboolean CameraMetadata_isEmpty(JNIEnv *env, jobject thiz) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) {
ALOGW("%s: Returning early due to exception being thrown",
__FUNCTION__);
return JNI_TRUE; // actually throws java exc.
}
jboolean empty = metadata->isEmpty();
ALOGV("%s: Empty returned %d, entry count was %zu",
__FUNCTION__, empty, metadata->entryCount());
return empty;
}
static jint CameraMetadata_getEntryCount(JNIEnv *env, jobject thiz) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) return 0; // actually throws java exc.
return metadata->entryCount();
}
// idempotent. calling more than once has no effect.
static void CameraMetadata_close(JNIEnv *env, jobject thiz) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* metadata = CameraMetadata_getPointerNoThrow(env, thiz);
if (metadata != NULL) {
delete metadata;
env->SetLongField(thiz, fields.metadata_ptr, 0);
}
LOG_ALWAYS_FATAL_IF(CameraMetadata_getPointerNoThrow(env, thiz) != NULL,
"Expected the native ptr to be 0 after #close");
}
static void CameraMetadata_swap(JNIEnv *env, jobject thiz, jobject other) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
// order is important: we can't call another JNI method
// if there is an exception pending
if (metadata == NULL) return;
CameraMetadata* otherMetadata = CameraMetadata_getPointerThrow(env, other, "other");
if (otherMetadata == NULL) return;
metadata->swap(*otherMetadata);
}
static jbyteArray CameraMetadata_readValues(JNIEnv *env, jobject thiz, jint tag) {
ALOGV("%s (tag = %d)", __FUNCTION__, tag);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) return NULL;
const camera_metadata_t *metaBuffer = metadata->getAndLock();
int tagType = get_local_camera_metadata_tag_type(tag, metaBuffer);
metadata->unlock(metaBuffer);
if (tagType == -1) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"Tag (%d) did not have a type", tag);
return NULL;
}
size_t tagSize = Helpers::getTypeSize(tagType);
camera_metadata_entry entry = metadata->find(tag);
if (entry.count == 0) {
if (!metadata->exists(tag)) {
ALOGV("%s: Tag %d does not have any entries", __FUNCTION__, tag);
return NULL;
} else {
// OK: we will return a 0-sized array.
ALOGV("%s: Tag %d had an entry, but it had 0 data", __FUNCTION__,
tag);
}
}
jsize byteCount = entry.count * tagSize;
jbyteArray byteArray = env->NewByteArray(byteCount);
if (env->ExceptionCheck()) return NULL;
// Copy into java array from native array
ScopedByteArrayRW arrayWriter(env, byteArray);
memcpy(arrayWriter.get(), entry.data.u8, byteCount);
return byteArray;
}
static void CameraMetadata_writeValues(JNIEnv *env, jobject thiz, jint tag, jbyteArray src) {
ALOGV("%s (tag = %d)", __FUNCTION__, tag);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) return;
const camera_metadata_t *metaBuffer = metadata->getAndLock();
int tagType = get_local_camera_metadata_tag_type(tag, metaBuffer);
metadata->unlock(metaBuffer);
if (tagType == -1) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"Tag (%d) did not have a type", tag);
return;
}
status_t res;
if (src == NULL) {
// If array is NULL, delete the entry
if (metadata->exists(tag)) {
res = metadata->erase(tag);
ALOGV("%s: Erase values (res = %d)", __FUNCTION__, res);
} else {
res = OK;
ALOGV("%s: Don't need to erase", __FUNCTION__);
}
} else {
// Copy from java array into native array
ScopedByteArrayRO arrayReader(env, src);
if (arrayReader.get() == NULL) return;
res = Helpers::updateAny(metadata, static_cast<uint32_t>(tag),
tagType, arrayReader.get(), arrayReader.size());
ALOGV("%s: Update values (res = %d)", __FUNCTION__, res);
}
if (res == OK) {
return;
} else if (res == BAD_VALUE) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"Src byte array was poorly formed");
} else if (res == INVALID_OPERATION) {
jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
"Internal error while trying to update metadata");
} else {
jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
"Unknown error (%d) while trying to update "
"metadata", res);
}
}
struct DumpMetadataParams {
int writeFd;
const CameraMetadata* metadata;
};
static void* CameraMetadata_writeMetadataThread(void* arg) {
DumpMetadataParams* p = static_cast<DumpMetadataParams*>(arg);
/*
* Write the dumped data, and close the writing side FD.
*/
p->metadata->dump(p->writeFd, /*verbosity*/2);
if (close(p->writeFd) < 0) {
ALOGE("%s: Failed to close writeFd (errno = %#x, message = '%s')",
__FUNCTION__, errno, strerror(errno));
}
return NULL;
}
static void CameraMetadata_dump(JNIEnv *env, jobject thiz) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) {
return;
}
/*
* Create a socket pair for local streaming read/writes.
*
* The metadata will be dumped into the write side,
* and then read back out (and logged) via the read side.
*/
int writeFd, readFd;
{
int sv[2];
if (socketpair(AF_LOCAL, SOCK_STREAM, /*protocol*/0, &sv[0]) < 0) {
jniThrowExceptionFmt(env, "java/io/IOException",
"Failed to create socketpair (errno = %#x, message = '%s')",
errno, strerror(errno));
return;
}
writeFd = sv[0];
readFd = sv[1];
}
/*
* Create a thread for doing the writing.
*
* The reading and writing must be concurrent, otherwise
* the write will block forever once it exhausts the capped
* buffer size (from getsockopt).
*/
pthread_t writeThread;
DumpMetadataParams params = {
writeFd,
metadata
};
{
int threadRet = pthread_create(&writeThread, /*attr*/NULL,
CameraMetadata_writeMetadataThread, (void*)¶ms);
if (threadRet != 0) {
close(writeFd);
close(readFd);
jniThrowExceptionFmt(env, "java/io/IOException",
"Failed to create thread for writing (errno = %#x, message = '%s')",
threadRet, strerror(threadRet));
return;
}
}
/*
* Read out a byte until stream is complete. Write completed lines
* to ALOG.
*/
{
char out[] = {'\0', '\0'}; // large enough to append as a string
String8 logLine;
// Read one byte at a time! Very slow but avoids complicated \n scanning.
ssize_t res;
while ((res = TEMP_FAILURE_RETRY(read(readFd, &out[0], /*count*/1))) > 0) {
if (out[0] == '\n') {
ALOGD("%s", logLine.string());
logLine.clear();
} else {
logLine.append(out);
}
}
if (res < 0) {
jniThrowExceptionFmt(env, "java/io/IOException",
"Failed to read from fd (errno = %#x, message = '%s')",
errno, strerror(errno));
//return;
} else if (!logLine.isEmpty()) {
ALOGD("%s", logLine.string());
}
close(readFd);
}
int res;
// Join until thread finishes. Ensures params/metadata is valid until then.
if ((res = pthread_join(writeThread, /*retval*/NULL)) != 0) {
ALOGE("%s: Failed to join thread (errno = %#x, message = '%s')",
__FUNCTION__, res, strerror(res));
}
}
static void CameraMetadata_readFromParcel(JNIEnv *env, jobject thiz, jobject parcel) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) {
return;
}
Parcel* parcelNative = parcelForJavaObject(env, parcel);
if (parcelNative == NULL) {
jniThrowNullPointerException(env, "parcel");
return;
}
status_t err;
if ((err = metadata->readFromParcel(parcelNative)) != OK) {
jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
"Failed to read from parcel (error code %d)", err);
return;
}
}
static void CameraMetadata_writeToParcel(JNIEnv *env, jobject thiz, jobject parcel) {
ALOGV("%s", __FUNCTION__);
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) {
return;
}
Parcel* parcelNative = parcelForJavaObject(env, parcel);
if (parcelNative == NULL) {
jniThrowNullPointerException(env, "parcel");
return;
}
status_t err;
if ((err = metadata->writeToParcel(parcelNative)) != OK) {
jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
"Failed to write to parcel (error code %d)", err);
return;
}
}
} // extern "C"
//-------------------------------------------------
static const JNINativeMethod gCameraMetadataMethods[] = {
// static methods
{ "nativeGetTagFromKey",
"(Ljava/lang/String;J)I",
(void *)CameraMetadata_getTagFromKey },
{ "nativeGetTypeFromTag",
"(IJ)I",
(void *)CameraMetadata_getTypeFromTag },
{ "nativeSetupGlobalVendorTagDescriptor",
"()I",
(void*)CameraMetadata_setupGlobalVendorTagDescriptor },
// instance methods
{ "nativeAllocate",
"()J",
(void*)CameraMetadata_allocate },
{ "nativeAllocateCopy",
"(L" CAMERA_METADATA_CLASS_NAME ";)J",
(void *)CameraMetadata_allocateCopy },
{ "nativeIsEmpty",
"()Z",
(void*)CameraMetadata_isEmpty },
{ "nativeGetEntryCount",
"()I",
(void*)CameraMetadata_getEntryCount },
{ "nativeClose",
"()V",
(void*)CameraMetadata_close },
{ "nativeSwap",
"(L" CAMERA_METADATA_CLASS_NAME ";)V",
(void *)CameraMetadata_swap },
{ "nativeGetTagFromKeyLocal",
"(Ljava/lang/String;)I",
(void *)CameraMetadata_getTagFromKeyLocal },
{ "nativeGetTypeFromTagLocal",
"(I)I",
(void *)CameraMetadata_getTypeFromTagLocal },
{ "nativeReadValues",
"(I)[B",
(void *)CameraMetadata_readValues },
{ "nativeWriteValues",
"(I[B)V",
(void *)CameraMetadata_writeValues },
{ "nativeDump",
"()V",
(void *)CameraMetadata_dump },
{ "nativeGetAllVendorKeys",
"(Ljava/lang/Class;)Ljava/util/ArrayList;",
(void *)CameraMetadata_getAllVendorKeys},
// Parcelable interface
{ "nativeReadFromParcel",
"(Landroid/os/Parcel;)V",
(void *)CameraMetadata_readFromParcel },
{ "nativeWriteToParcel",
"(Landroid/os/Parcel;)V",
(void *)CameraMetadata_writeToParcel },
};
// Get all the required offsets in java class and register native functions
int register_android_hardware_camera2_CameraMetadata(JNIEnv *env)
{
// Store global references to Key-related classes and methods used natively
jclass characteristicsKeyClazz = FindClassOrDie(env, CHARACTERISTICS_KEY_CLASS_NAME);
jclass requestKeyClazz = FindClassOrDie(env, REQUEST_KEY_CLASS_NAME);
jclass resultKeyClazz = FindClassOrDie(env, RESULT_KEY_CLASS_NAME);
gMetadataOffsets.mCharacteristicsKey = MakeGlobalRefOrDie(env, characteristicsKeyClazz);
gMetadataOffsets.mRequestKey = MakeGlobalRefOrDie(env, requestKeyClazz);
gMetadataOffsets.mResultKey = MakeGlobalRefOrDie(env, resultKeyClazz);
gMetadataOffsets.mCharacteristicsConstr = GetMethodIDOrDie(env,
gMetadataOffsets.mCharacteristicsKey, "<init>",
"(Ljava/lang/String;Ljava/lang/Class;J)V");
gMetadataOffsets.mRequestConstr = GetMethodIDOrDie(env,
gMetadataOffsets.mRequestKey, "<init>", "(Ljava/lang/String;Ljava/lang/Class;J)V");
gMetadataOffsets.mResultConstr = GetMethodIDOrDie(env,
gMetadataOffsets.mResultKey, "<init>", "(Ljava/lang/String;Ljava/lang/Class;J)V");
// Store global references for primitive array types used by Keys
jclass byteClazz = FindClassOrDie(env, "[B");
jclass int32Clazz = FindClassOrDie(env, "[I");
jclass floatClazz = FindClassOrDie(env, "[F");
jclass int64Clazz = FindClassOrDie(env, "[J");
jclass doubleClazz = FindClassOrDie(env, "[D");
jclass rationalClazz = FindClassOrDie(env, "[Landroid/util/Rational;");
gMetadataOffsets.mByteArray = MakeGlobalRefOrDie(env, byteClazz);
gMetadataOffsets.mInt32Array = MakeGlobalRefOrDie(env, int32Clazz);
gMetadataOffsets.mFloatArray = MakeGlobalRefOrDie(env, floatClazz);
gMetadataOffsets.mInt64Array = MakeGlobalRefOrDie(env, int64Clazz);
gMetadataOffsets.mDoubleArray = MakeGlobalRefOrDie(env, doubleClazz);
gMetadataOffsets.mRationalArray = MakeGlobalRefOrDie(env, rationalClazz);
// Store global references for ArrayList methods used
jclass arrayListClazz = FindClassOrDie(env, "java/util/ArrayList");
gMetadataOffsets.mArrayList = MakeGlobalRefOrDie(env, arrayListClazz);
gMetadataOffsets.mArrayListConstr = GetMethodIDOrDie(env, gMetadataOffsets.mArrayList,
"<init>", "(I)V");
gMetadataOffsets.mArrayListAdd = GetMethodIDOrDie(env, gMetadataOffsets.mArrayList,
"add", "(Ljava/lang/Object;)Z");
jclass cameraMetadataClazz = FindClassOrDie(env, CAMERA_METADATA_CLASS_NAME);
fields.metadata_ptr = GetFieldIDOrDie(env, cameraMetadataClazz, "mMetadataPtr", "J");
// Register native functions
return RegisterMethodsOrDie(env,
CAMERA_METADATA_CLASS_NAME,
gCameraMetadataMethods,
NELEM(gCameraMetadataMethods));
}
extern "C" {
static jint CameraMetadata_getTypeFromTagLocal(JNIEnv *env, jobject thiz, jint tag) {
CameraMetadata* metadata = CameraMetadata_getPointerNoThrow(env, thiz);
metadata_vendor_id_t vendorId = CAMERA_METADATA_INVALID_VENDOR_ID;
if (metadata) {
const camera_metadata_t *metaBuffer = metadata->getAndLock();
vendorId = get_camera_metadata_vendor_id(metaBuffer);
metadata->unlock(metaBuffer);
}
int tagType = get_local_camera_metadata_tag_type_vendor_id(tag, vendorId);
if (tagType == -1) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"Tag (%d) did not have a type", tag);
return -1;
}
return tagType;
}
static jint CameraMetadata_getTagFromKeyLocal(JNIEnv *env, jobject thiz, jstring keyName) {
ScopedUtfChars keyScoped(env, keyName);
const char *key = keyScoped.c_str();
if (key == NULL) {
// exception thrown by ScopedUtfChars
return 0;
}
ALOGV("%s (key = '%s')", __FUNCTION__, key);
uint32_t tag = 0;
sp<VendorTagDescriptor> vTags;
CameraMetadata* metadata = CameraMetadata_getPointerNoThrow(env, thiz);
if (metadata) {
sp<VendorTagDescriptorCache> cache = VendorTagDescriptorCache::getGlobalVendorTagCache();
if (cache.get()) {
const camera_metadata_t *metaBuffer = metadata->getAndLock();
metadata_vendor_id_t vendorId = get_camera_metadata_vendor_id(metaBuffer);
metadata->unlock(metaBuffer);
cache->getVendorTagDescriptor(vendorId, &vTags);
}
}
status_t res = CameraMetadata::getTagFromName(key, vTags.get(), &tag);
if (res != OK) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"Could not find tag for key '%s')", key);
}
return tag;
}
static jobject CameraMetadata_getAllVendorKeys(JNIEnv* env, jobject thiz, jclass keyType) {
metadata_vendor_id_t vendorId = CAMERA_METADATA_INVALID_VENDOR_ID;
// Get all vendor tags
sp<VendorTagDescriptor> vTags = VendorTagDescriptor::getGlobalVendorTagDescriptor();
if (vTags.get() == nullptr) {
sp<VendorTagDescriptorCache> cache = VendorTagDescriptorCache::getGlobalVendorTagCache();
if (cache.get() == nullptr) {
// No vendor tags.
return nullptr;
}
CameraMetadata* metadata = CameraMetadata_getPointerThrow(env, thiz);
if (metadata == NULL) return NULL;
const camera_metadata_t *metaBuffer = metadata->getAndLock();
vendorId = get_camera_metadata_vendor_id(metaBuffer);
cache->getVendorTagDescriptor(vendorId, &vTags);
metadata->unlock(metaBuffer);
if (vTags.get() == nullptr) {
return nullptr;
}
}
int count = vTags->getTagCount();
if (count <= 0) {
// No vendor tags.
return NULL;
}
std::vector<uint32_t> tagIds(count, /*initializer value*/0);
vTags->getTagArray(&tagIds[0]);
// Which key class/constructor should we use?
jclass keyClazz;
jmethodID keyConstr;
if (env->IsSameObject(keyType, gMetadataOffsets.mCharacteristicsKey)) {
keyClazz = gMetadataOffsets.mCharacteristicsKey;
keyConstr = gMetadataOffsets.mCharacteristicsConstr;
} else if (env->IsSameObject(keyType, gMetadataOffsets.mResultKey)) {
keyClazz = gMetadataOffsets.mResultKey;
keyConstr = gMetadataOffsets.mResultConstr;
} else if (env->IsSameObject(keyType, gMetadataOffsets.mRequestKey)) {
keyClazz = gMetadataOffsets.mRequestKey;
keyConstr = gMetadataOffsets.mRequestConstr;
} else {
jniThrowException(env, "java/lang/IllegalArgumentException",
"Invalid key class given as argument.");
return NULL;
}
// Allocate arrayList to return
jobject arrayList = env->NewObject(gMetadataOffsets.mArrayList,
gMetadataOffsets.mArrayListConstr, static_cast<jint>(count));
if (env->ExceptionCheck()) {
return NULL;
}
for (uint32_t id : tagIds) {
const char* section = vTags->getSectionName(id);
const char* tag = vTags->getTagName(id);
int type = vTags->getTagType(id);
size_t totalLen = strlen(section) + strlen(tag) + 2;
std::vector<char> fullName(totalLen, 0);
snprintf(&fullName[0], totalLen, "%s.%s", section, tag);
jstring name = env->NewStringUTF(&fullName[0]);
if (env->ExceptionCheck()) {
return NULL;
}
jclass valueClazz;
switch (type) {
case TYPE_BYTE:
valueClazz = gMetadataOffsets.mByteArray;
break;
case TYPE_INT32:
valueClazz = gMetadataOffsets.mInt32Array;
break;
case TYPE_FLOAT:
valueClazz = gMetadataOffsets.mFloatArray;
break;
case TYPE_INT64:
valueClazz = gMetadataOffsets.mInt64Array;
break;
case TYPE_DOUBLE:
valueClazz = gMetadataOffsets.mDoubleArray;
break;
case TYPE_RATIONAL:
valueClazz = gMetadataOffsets.mRationalArray;
break;
default:
jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
"Invalid type %d given for key %s", type, &fullName[0]);
return NULL;
}
jobject key = env->NewObject(keyClazz, keyConstr, name, valueClazz, vendorId);
if (env->ExceptionCheck()) {
return NULL;
}
env->CallBooleanMethod(arrayList, gMetadataOffsets.mArrayListAdd, key);
if (env->ExceptionCheck()) {
return NULL;
}
env->DeleteLocalRef(name);
env->DeleteLocalRef(key);
}
return arrayList;
}
static jint CameraMetadata_getTagFromKey(JNIEnv *env, jobject thiz, jstring keyName,
jlong vendorId) {
ScopedUtfChars keyScoped(env, keyName);
const char *key = keyScoped.c_str();
if (key == NULL) {
// exception thrown by ScopedUtfChars
return 0;
}
ALOGV("%s (key = '%s')", __FUNCTION__, key);
uint32_t tag = 0;
sp<VendorTagDescriptor> vTags =
VendorTagDescriptor::getGlobalVendorTagDescriptor();
if (vTags.get() == nullptr) {
sp<VendorTagDescriptorCache> cache = VendorTagDescriptorCache::getGlobalVendorTagCache();
if (cache.get() != nullptr) {
cache->getVendorTagDescriptor(vendorId, &vTags);
}
}
status_t res = CameraMetadata::getTagFromName(key, vTags.get(), &tag);
if (res != OK) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"Could not find tag for key '%s')", key);
}
return tag;
}
static jint CameraMetadata_getTypeFromTag(JNIEnv *env, jobject thiz, jint tag, jlong vendorId) {
int tagType = get_local_camera_metadata_tag_type_vendor_id(tag, vendorId);
if (tagType == -1) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"Tag (%d) did not have a type", tag);
return -1;
}
return tagType;
}
static jint CameraMetadata_setupGlobalVendorTagDescriptor(JNIEnv *env, jobject thiz) {
const String16 NAME("media.camera");
sp<hardware::ICameraService> cameraService;
status_t err = getService(NAME, /*out*/&cameraService);
if (err != OK) {
ALOGE("%s: Failed to get camera service, received error %s (%d)", __FUNCTION__,
strerror(-err), err);
return hardware::ICameraService::ERROR_DISCONNECTED;
}
sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
binder::Status res = cameraService->getCameraVendorTagDescriptor(/*out*/desc.get());
if (res.serviceSpecificErrorCode() == hardware::ICameraService::ERROR_DISCONNECTED) {
// No camera module available, not an error on devices with no cameras
VendorTagDescriptor::clearGlobalVendorTagDescriptor();
return OK;
} else if (!res.isOk()) {
VendorTagDescriptor::clearGlobalVendorTagDescriptor();
ALOGE("%s: Failed to setup vendor tag descriptors: %s",
__FUNCTION__, res.toString8().string());
return res.serviceSpecificErrorCode();
}
if (0 < desc->getTagCount()) {
err = VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc);
} else {
sp<VendorTagDescriptorCache> cache = new VendorTagDescriptorCache();
binder::Status res = cameraService->getCameraVendorTagCache(/*out*/cache.get());
if (res.serviceSpecificErrorCode() == hardware::ICameraService::ERROR_DISCONNECTED) {
// No camera module available, not an error on devices with no cameras
VendorTagDescriptorCache::clearGlobalVendorTagCache();
return OK;
} else if (!res.isOk()) {
VendorTagDescriptorCache::clearGlobalVendorTagCache();
ALOGE("%s: Failed to setup vendor tag cache: %s",
__FUNCTION__, res.toString8().string());
return res.serviceSpecificErrorCode();
}
err = VendorTagDescriptorCache::setAsGlobalVendorTagCache(cache);
}
if (err != OK) {
return hardware::ICameraService::ERROR_INVALID_OPERATION;
}
return OK;
}
} // extern "C"