libshims/CameraMetadata.cpp - LeafOS-Devices/android_device_samsung_universal7904-common - Gitiles

 /*
  * Copyright (C) 2012 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 "Camera2-Metadata"
 #include <log/log.h>
 #include <utils/Errors.h>

 #include "CameraMetadata.h"

 namespace android {

 #define ALIGN_TO(val, alignment) \
     (((uintptr_t)(val) + ((alignment) - 1)) & ~((alignment) - 1))

 CameraMetadata::CameraMetadata() :
         mBuffer(NULL), mLocked(false) {
 }

 CameraMetadata::CameraMetadata(size_t entryCapacity, size_t dataCapacity) :
         mLocked(false)
 {
     mBuffer = allocate_camera_metadata(entryCapacity, dataCapacity);
 }

 CameraMetadata::CameraMetadata(const CameraMetadata &other) :
         mLocked(false) {
     mBuffer = clone_camera_metadata(other.mBuffer);
 }

 CameraMetadata::CameraMetadata(camera_metadata_t *buffer) :
         mBuffer(NULL), mLocked(false) {
     acquire(buffer);
 }

 CameraMetadata &CameraMetadata::operator=(const CameraMetadata &other) {
     return operator=(other.mBuffer);
 }

 CameraMetadata &CameraMetadata::operator=(const camera_metadata_t *buffer) {
     if (mLocked) {
         ALOGE("%s: Assignment to a locked CameraMetadata!", __FUNCTION__);
         return *this;
     }

     if (CC_LIKELY(buffer != mBuffer)) {
         camera_metadata_t *newBuffer = clone_camera_metadata(buffer);
         clear();
         mBuffer = newBuffer;
     }
     return *this;
 }

 CameraMetadata::~CameraMetadata() {
     mLocked = false;
     clear();
 }

 const camera_metadata_t* CameraMetadata::getAndLock() const {
     mLocked = true;
     return mBuffer;
 }

 status_t CameraMetadata::unlock(const camera_metadata_t *buffer) const {
     if (!mLocked) {
         ALOGE("%s: Can't unlock a non-locked CameraMetadata!", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if (buffer != mBuffer) {
         ALOGE("%s: Can't unlock CameraMetadata with wrong pointer!",
                 __FUNCTION__);
         return BAD_VALUE;
     }
     mLocked = false;
     return OK;
 }

 camera_metadata_t* CameraMetadata::release() {
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return NULL;
     }
     camera_metadata_t *released = mBuffer;
     mBuffer = NULL;
     return released;
 }

 void CameraMetadata::clear() {
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return;
     }
     if (mBuffer) {
         free_camera_metadata(mBuffer);
         mBuffer = NULL;
     }
 }

 void CameraMetadata::acquire(camera_metadata_t *buffer) {
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return;
     }
     clear();
     mBuffer = buffer;

     ALOGE_IF(validate_camera_metadata_structure(mBuffer, /*size*/NULL) != OK,
              "%s: Failed to validate metadata structure %p",
              __FUNCTION__, buffer);
 }

 void CameraMetadata::acquire(CameraMetadata &other) {
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return;
     }
     acquire(other.release());
 }

 status_t CameraMetadata::append(const CameraMetadata &other) {
     return append(other.mBuffer);
 }

 status_t CameraMetadata::append(const camera_metadata_t* other) {
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     size_t extraEntries = get_camera_metadata_entry_count(other);
     size_t extraData = get_camera_metadata_data_count(other);
     resizeIfNeeded(extraEntries, extraData);

     return append_camera_metadata(mBuffer, other);
 }

 size_t CameraMetadata::entryCount() const {
     return (mBuffer == NULL) ? 0 :
             get_camera_metadata_entry_count(mBuffer);
 }

 bool CameraMetadata::isEmpty() const {
     return entryCount() == 0;
 }

 status_t CameraMetadata::sort() {
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     return sort_camera_metadata(mBuffer);
 }

 status_t CameraMetadata::checkType(uint32_t tag, uint8_t expectedType) {
     int tagType = get_local_camera_metadata_tag_type(tag, mBuffer);
     if ( CC_UNLIKELY(tagType == -1)) {
         ALOGE("Update metadata entry: Unknown tag %d", tag);
         return INVALID_OPERATION;
     }
     if ( CC_UNLIKELY(tagType != expectedType) ) {
         ALOGE("Mismatched tag type when updating entry %s (%d) of type %s; "
                 "got type %s data instead ",
                 get_local_camera_metadata_tag_name(tag, mBuffer), tag,
                 camera_metadata_type_names[tagType],
                 camera_metadata_type_names[expectedType]);
         return INVALID_OPERATION;
     }
     return OK;
 }

 status_t CameraMetadata::update(uint32_t tag,
         const int32_t *data, size_t data_count) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(tag, TYPE_INT32)) != OK) {
         return res;
     }
     return updateImpl(tag, (const void*)data, data_count);
 }

 status_t CameraMetadata::update(uint32_t tag,
         const uint8_t *data, size_t data_count) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
         return res;
     }
     return updateImpl(tag, (const void*)data, data_count);
 }

 status_t CameraMetadata::update(uint32_t tag,
         const float *data, size_t data_count) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(tag, TYPE_FLOAT)) != OK) {
         return res;
     }
     return updateImpl(tag, (const void*)data, data_count);
 }

 status_t CameraMetadata::update(uint32_t tag,
         const int64_t *data, size_t data_count) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(tag, TYPE_INT64)) != OK) {
         return res;
     }
     return updateImpl(tag, (const void*)data, data_count);
 }

 status_t CameraMetadata::update(uint32_t tag,
         const double *data, size_t data_count) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(tag, TYPE_DOUBLE)) != OK) {
         return res;
     }
     return updateImpl(tag, (const void*)data, data_count);
 }

 status_t CameraMetadata::update(uint32_t tag,
         const camera_metadata_rational_t *data, size_t data_count) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(tag, TYPE_RATIONAL)) != OK) {
         return res;
     }
     return updateImpl(tag, (const void*)data, data_count);
 }

 status_t CameraMetadata::update(uint32_t tag,
         const String8 &string) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
         return res;
     }
     // string.size() doesn't count the null termination character.
     return updateImpl(tag, (const void*)string.string(), string.size() + 1);
 }

 status_t CameraMetadata::update(const camera_metadata_ro_entry &entry) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     if ( (res = checkType(entry.tag, entry.type)) != OK) {
         return res;
     }
     return updateImpl(entry.tag, (const void*)entry.data.u8, entry.count);
 }

 status_t CameraMetadata::updateImpl(uint32_t tag, const void *data,
         size_t data_count) {
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     int type = get_local_camera_metadata_tag_type(tag, mBuffer);
     if (type == -1) {
         ALOGE("%s: Tag %d not found", __FUNCTION__, tag);
         return BAD_VALUE;
     }
     // Safety check - ensure that data isn't pointing to this metadata, since
     // that would get invalidated if a resize is needed
     size_t bufferSize = get_camera_metadata_size(mBuffer);
     uintptr_t bufAddr = reinterpret_cast<uintptr_t>(mBuffer);
     uintptr_t dataAddr = reinterpret_cast<uintptr_t>(data);
     if (dataAddr > bufAddr && dataAddr < (bufAddr + bufferSize)) {
         ALOGE("%s: Update attempted with data from the same metadata buffer!",
                 __FUNCTION__);
         return INVALID_OPERATION;
     }

     size_t data_size = calculate_camera_metadata_entry_data_size(type,
             data_count);

     res = resizeIfNeeded(1, data_size);

     if (res == OK) {
         camera_metadata_entry_t entry;
         res = find_camera_metadata_entry(mBuffer, tag, &entry);
         if (res == NAME_NOT_FOUND) {
             res = add_camera_metadata_entry(mBuffer,
                     tag, data, data_count);
         } else if (res == OK) {
             res = update_camera_metadata_entry(mBuffer,
                     entry.index, data, data_count, NULL);
         }
     }

     if (res != OK) {
         ALOGE("%s: Unable to update metadata entry %s.%s (%x): %s (%d)",
                 __FUNCTION__, get_local_camera_metadata_section_name(tag, mBuffer),
                 get_local_camera_metadata_tag_name(tag, mBuffer), tag,
                 strerror(-res), res);
     }

     IF_ALOGV() {
         ALOGE_IF(validate_camera_metadata_structure(mBuffer, /*size*/NULL) !=
                  OK,

                  "%s: Failed to validate metadata structure after update %p",
                  __FUNCTION__, mBuffer);
     }

     return res;
 }

 bool CameraMetadata::exists(uint32_t tag) const {
     camera_metadata_ro_entry entry;
     return find_camera_metadata_ro_entry(mBuffer, tag, &entry) == 0;
 }

 camera_metadata_entry_t CameraMetadata::find(uint32_t tag) {
     status_t res;
     camera_metadata_entry entry;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         entry.count = 0;
         return entry;
     }
     res = find_camera_metadata_entry(mBuffer, tag, &entry);
     if (CC_UNLIKELY( res != OK )) {
         entry.count = 0;
         entry.data.u8 = NULL;
     }
     return entry;
 }

 camera_metadata_ro_entry_t CameraMetadata::find(uint32_t tag) const {
     status_t res;
     camera_metadata_ro_entry entry;
     res = find_camera_metadata_ro_entry(mBuffer, tag, &entry);
     if (CC_UNLIKELY( res != OK )) {
         entry.count = 0;
         entry.data.u8 = NULL;
     }
     return entry;
 }

 status_t CameraMetadata::erase(uint32_t tag) {
     camera_metadata_entry_t entry;
     status_t res;
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return INVALID_OPERATION;
     }
     res = find_camera_metadata_entry(mBuffer, tag, &entry);
     if (res == NAME_NOT_FOUND) {
         return OK;
     } else if (res != OK) {
         ALOGE("%s: Error looking for entry %s.%s (%x): %s %d",
                 __FUNCTION__,
                 get_local_camera_metadata_section_name(tag, mBuffer),
                 get_local_camera_metadata_tag_name(tag, mBuffer),
                 tag, strerror(-res), res);
         return res;
     }
     res = delete_camera_metadata_entry(mBuffer, entry.index);
     if (res != OK) {
         ALOGE("%s: Error deleting entry %s.%s (%x): %s %d",
                 __FUNCTION__,
                 get_local_camera_metadata_section_name(tag, mBuffer),
                 get_local_camera_metadata_tag_name(tag, mBuffer),
                 tag, strerror(-res), res);
     }
     return res;
 }

 void CameraMetadata::dump(int fd, int verbosity, int indentation) const {
     dump_indented_camera_metadata(mBuffer, fd, verbosity, indentation);
 }

 status_t CameraMetadata::resizeIfNeeded(size_t extraEntries, size_t extraData) {
     if (mBuffer == NULL) {
         mBuffer = allocate_camera_metadata(extraEntries * 2, extraData * 2);
         if (mBuffer == NULL) {
             ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
             return NO_MEMORY;
         }
     } else {
         size_t currentEntryCount = get_camera_metadata_entry_count(mBuffer);
         size_t currentEntryCap = get_camera_metadata_entry_capacity(mBuffer);
         size_t newEntryCount = currentEntryCount +
                 extraEntries;
         newEntryCount = (newEntryCount > currentEntryCap) ?
                 newEntryCount * 2 : currentEntryCap;

         size_t currentDataCount = get_camera_metadata_data_count(mBuffer);
         size_t currentDataCap = get_camera_metadata_data_capacity(mBuffer);
         size_t newDataCount = currentDataCount +
                 extraData;
         newDataCount = (newDataCount > currentDataCap) ?
                 newDataCount * 2 : currentDataCap;

         if (newEntryCount > currentEntryCap ||
                 newDataCount > currentDataCap) {
             camera_metadata_t *oldBuffer = mBuffer;
             mBuffer = allocate_camera_metadata(newEntryCount,
                     newDataCount);
             if (mBuffer == NULL) {
                 ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
                 return NO_MEMORY;
             }
             append_camera_metadata(mBuffer, oldBuffer);
             free_camera_metadata(oldBuffer);
         }
     }
     return OK;
 }

 void CameraMetadata::swap(CameraMetadata& other) {
     if (mLocked) {
         ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
         return;
     } else if (other.mLocked) {
         ALOGE("%s: Other CameraMetadata is locked", __FUNCTION__);
         return;
     }

     camera_metadata* thisBuf = mBuffer;
     camera_metadata* otherBuf = other.mBuffer;

     other.mBuffer = thisBuf;
     mBuffer = otherBuf;
 }


 }; // namespace android
	/*
	* Copyright (C) 2012 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 "Camera2-Metadata"
	#include <log/log.h>
	#include <utils/Errors.h>

	#include "CameraMetadata.h"

	namespace android {

	#define ALIGN_TO(val, alignment) \
	(((uintptr_t)(val) + ((alignment) - 1)) & ~((alignment) - 1))

	CameraMetadata::CameraMetadata() :
	mBuffer(NULL), mLocked(false) {
	}

	CameraMetadata::CameraMetadata(size_t entryCapacity, size_t dataCapacity) :
	mLocked(false)
	{
	mBuffer = allocate_camera_metadata(entryCapacity, dataCapacity);
	}

	CameraMetadata::CameraMetadata(const CameraMetadata &other) :
	mLocked(false) {
	mBuffer = clone_camera_metadata(other.mBuffer);
	}

	CameraMetadata::CameraMetadata(camera_metadata_t *buffer) :
	mBuffer(NULL), mLocked(false) {
	acquire(buffer);
	}

	CameraMetadata &CameraMetadata::operator=(const CameraMetadata &other) {
	return operator=(other.mBuffer);
	}

	CameraMetadata &CameraMetadata::operator=(const camera_metadata_t *buffer) {
	if (mLocked) {
	ALOGE("%s: Assignment to a locked CameraMetadata!", __FUNCTION__);
	return *this;
	}

	if (CC_LIKELY(buffer != mBuffer)) {
	camera_metadata_t *newBuffer = clone_camera_metadata(buffer);
	clear();
	mBuffer = newBuffer;
	}
	return *this;
	}

	CameraMetadata::~CameraMetadata() {
	mLocked = false;
	clear();
	}

	const camera_metadata_t* CameraMetadata::getAndLock() const {
	mLocked = true;
	return mBuffer;
	}

	status_t CameraMetadata::unlock(const camera_metadata_t *buffer) const {
	if (!mLocked) {
	ALOGE("%s: Can't unlock a non-locked CameraMetadata!", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if (buffer != mBuffer) {
	ALOGE("%s: Can't unlock CameraMetadata with wrong pointer!",
	__FUNCTION__);
	return BAD_VALUE;
	}
	mLocked = false;
	return OK;
	}

	camera_metadata_t* CameraMetadata::release() {
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return NULL;
	}
	camera_metadata_t *released = mBuffer;
	mBuffer = NULL;
	return released;
	}

	void CameraMetadata::clear() {
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return;
	}
	if (mBuffer) {
	free_camera_metadata(mBuffer);
	mBuffer = NULL;
	}
	}

	void CameraMetadata::acquire(camera_metadata_t *buffer) {
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return;
	}
	clear();
	mBuffer = buffer;

	ALOGE_IF(validate_camera_metadata_structure(mBuffer, /size/NULL) != OK,
	"%s: Failed to validate metadata structure %p",
	__FUNCTION__, buffer);
	}

	void CameraMetadata::acquire(CameraMetadata &other) {
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return;
	}
	acquire(other.release());
	}

	status_t CameraMetadata::append(const CameraMetadata &other) {
	return append(other.mBuffer);
	}

	status_t CameraMetadata::append(const camera_metadata_t* other) {
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	size_t extraEntries = get_camera_metadata_entry_count(other);
	size_t extraData = get_camera_metadata_data_count(other);
	resizeIfNeeded(extraEntries, extraData);

	return append_camera_metadata(mBuffer, other);
	}

	size_t CameraMetadata::entryCount() const {
	return (mBuffer == NULL) ? 0 :
	get_camera_metadata_entry_count(mBuffer);
	}

	bool CameraMetadata::isEmpty() const {
	return entryCount() == 0;
	}

	status_t CameraMetadata::sort() {
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	return sort_camera_metadata(mBuffer);
	}

	status_t CameraMetadata::checkType(uint32_t tag, uint8_t expectedType) {
	int tagType = get_local_camera_metadata_tag_type(tag, mBuffer);
	if ( CC_UNLIKELY(tagType == -1)) {
	ALOGE("Update metadata entry: Unknown tag %d", tag);
	return INVALID_OPERATION;
	}
	if ( CC_UNLIKELY(tagType != expectedType) ) {
	ALOGE("Mismatched tag type when updating entry %s (%d) of type %s; "
	"got type %s data instead ",
	get_local_camera_metadata_tag_name(tag, mBuffer), tag,
	camera_metadata_type_names[tagType],
	camera_metadata_type_names[expectedType]);
	return INVALID_OPERATION;
	}
	return OK;
	}

	status_t CameraMetadata::update(uint32_t tag,
	const int32_t *data, size_t data_count) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(tag, TYPE_INT32)) != OK) {
	return res;
	}
	return updateImpl(tag, (const void*)data, data_count);
	}

	status_t CameraMetadata::update(uint32_t tag,
	const uint8_t *data, size_t data_count) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
	return res;
	}
	return updateImpl(tag, (const void*)data, data_count);
	}

	status_t CameraMetadata::update(uint32_t tag,
	const float *data, size_t data_count) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(tag, TYPE_FLOAT)) != OK) {
	return res;
	}
	return updateImpl(tag, (const void*)data, data_count);
	}

	status_t CameraMetadata::update(uint32_t tag,
	const int64_t *data, size_t data_count) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(tag, TYPE_INT64)) != OK) {
	return res;
	}
	return updateImpl(tag, (const void*)data, data_count);
	}

	status_t CameraMetadata::update(uint32_t tag,
	const double *data, size_t data_count) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(tag, TYPE_DOUBLE)) != OK) {
	return res;
	}
	return updateImpl(tag, (const void*)data, data_count);
	}

	status_t CameraMetadata::update(uint32_t tag,
	const camera_metadata_rational_t *data, size_t data_count) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(tag, TYPE_RATIONAL)) != OK) {
	return res;
	}
	return updateImpl(tag, (const void*)data, data_count);
	}

	status_t CameraMetadata::update(uint32_t tag,
	const String8 &string) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
	return res;
	}
	// string.size() doesn't count the null termination character.
	return updateImpl(tag, (const void*)string.string(), string.size() + 1);
	}

	status_t CameraMetadata::update(const camera_metadata_ro_entry &entry) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	if ( (res = checkType(entry.tag, entry.type)) != OK) {
	return res;
	}
	return updateImpl(entry.tag, (const void*)entry.data.u8, entry.count);
	}

	status_t CameraMetadata::updateImpl(uint32_t tag, const void *data,
	size_t data_count) {
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	int type = get_local_camera_metadata_tag_type(tag, mBuffer);
	if (type == -1) {
	ALOGE("%s: Tag %d not found", __FUNCTION__, tag);
	return BAD_VALUE;
	}
	// Safety check - ensure that data isn't pointing to this metadata, since
	// that would get invalidated if a resize is needed
	size_t bufferSize = get_camera_metadata_size(mBuffer);
	uintptr_t bufAddr = reinterpret_cast<uintptr_t>(mBuffer);
	uintptr_t dataAddr = reinterpret_cast<uintptr_t>(data);
	if (dataAddr > bufAddr && dataAddr < (bufAddr + bufferSize)) {
	ALOGE("%s: Update attempted with data from the same metadata buffer!",
	__FUNCTION__);
	return INVALID_OPERATION;
	}

	size_t data_size = calculate_camera_metadata_entry_data_size(type,
	data_count);

	res = resizeIfNeeded(1, data_size);

	if (res == OK) {
	camera_metadata_entry_t entry;
	res = find_camera_metadata_entry(mBuffer, tag, &entry);
	if (res == NAME_NOT_FOUND) {
	res = add_camera_metadata_entry(mBuffer,
	tag, data, data_count);
	} else if (res == OK) {
	res = update_camera_metadata_entry(mBuffer,
	entry.index, data, data_count, NULL);
	}
	}

	if (res != OK) {
	ALOGE("%s: Unable to update metadata entry %s.%s (%x): %s (%d)",
	__FUNCTION__, get_local_camera_metadata_section_name(tag, mBuffer),
	get_local_camera_metadata_tag_name(tag, mBuffer), tag,
	strerror(-res), res);
	}

	IF_ALOGV() {
	ALOGE_IF(validate_camera_metadata_structure(mBuffer, /size/NULL) !=
	OK,

	"%s: Failed to validate metadata structure after update %p",
	__FUNCTION__, mBuffer);
	}

	return res;
	}

	bool CameraMetadata::exists(uint32_t tag) const {
	camera_metadata_ro_entry entry;
	return find_camera_metadata_ro_entry(mBuffer, tag, &entry) == 0;
	}

	camera_metadata_entry_t CameraMetadata::find(uint32_t tag) {
	status_t res;
	camera_metadata_entry entry;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	entry.count = 0;
	return entry;
	}
	res = find_camera_metadata_entry(mBuffer, tag, &entry);
	if (CC_UNLIKELY( res != OK )) {
	entry.count = 0;
	entry.data.u8 = NULL;
	}
	return entry;
	}

	camera_metadata_ro_entry_t CameraMetadata::find(uint32_t tag) const {
	status_t res;
	camera_metadata_ro_entry entry;
	res = find_camera_metadata_ro_entry(mBuffer, tag, &entry);
	if (CC_UNLIKELY( res != OK )) {
	entry.count = 0;
	entry.data.u8 = NULL;
	}
	return entry;
	}

	status_t CameraMetadata::erase(uint32_t tag) {
	camera_metadata_entry_t entry;
	status_t res;
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return INVALID_OPERATION;
	}
	res = find_camera_metadata_entry(mBuffer, tag, &entry);
	if (res == NAME_NOT_FOUND) {
	return OK;
	} else if (res != OK) {
	ALOGE("%s: Error looking for entry %s.%s (%x): %s %d",
	__FUNCTION__,
	get_local_camera_metadata_section_name(tag, mBuffer),
	get_local_camera_metadata_tag_name(tag, mBuffer),
	tag, strerror(-res), res);
	return res;
	}
	res = delete_camera_metadata_entry(mBuffer, entry.index);
	if (res != OK) {
	ALOGE("%s: Error deleting entry %s.%s (%x): %s %d",
	__FUNCTION__,
	get_local_camera_metadata_section_name(tag, mBuffer),
	get_local_camera_metadata_tag_name(tag, mBuffer),
	tag, strerror(-res), res);
	}
	return res;
	}

	void CameraMetadata::dump(int fd, int verbosity, int indentation) const {
	dump_indented_camera_metadata(mBuffer, fd, verbosity, indentation);
	}

	status_t CameraMetadata::resizeIfNeeded(size_t extraEntries, size_t extraData) {
	if (mBuffer == NULL) {
	mBuffer = allocate_camera_metadata(extraEntries * 2, extraData * 2);
	if (mBuffer == NULL) {
	ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
	return NO_MEMORY;
	}
	} else {
	size_t currentEntryCount = get_camera_metadata_entry_count(mBuffer);
	size_t currentEntryCap = get_camera_metadata_entry_capacity(mBuffer);
	size_t newEntryCount = currentEntryCount +
	extraEntries;
	newEntryCount = (newEntryCount > currentEntryCap) ?
	newEntryCount * 2 : currentEntryCap;

	size_t currentDataCount = get_camera_metadata_data_count(mBuffer);
	size_t currentDataCap = get_camera_metadata_data_capacity(mBuffer);
	size_t newDataCount = currentDataCount +
	extraData;
	newDataCount = (newDataCount > currentDataCap) ?
	newDataCount * 2 : currentDataCap;

	if (newEntryCount > currentEntryCap \|\|
	newDataCount > currentDataCap) {
	camera_metadata_t *oldBuffer = mBuffer;
	mBuffer = allocate_camera_metadata(newEntryCount,
	newDataCount);
	if (mBuffer == NULL) {
	ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
	return NO_MEMORY;
	}
	append_camera_metadata(mBuffer, oldBuffer);
	free_camera_metadata(oldBuffer);
	}
	}
	return OK;
	}

	void CameraMetadata::swap(CameraMetadata& other) {
	if (mLocked) {
	ALOGE("%s: CameraMetadata is locked", __FUNCTION__);
	return;
	} else if (other.mLocked) {
	ALOGE("%s: Other CameraMetadata is locked", __FUNCTION__);
	return;
	}

	camera_metadata* thisBuf = mBuffer;
	camera_metadata* otherBuf = other.mBuffer;

	other.mBuffer = thisBuf;
	mBuffer = otherBuf;
	}


	}; // namespace android