camera/VendorTagDescriptor.cpp - platform/frameworks/av - Git at Google

 /*
  * Copyright (C) 2014 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_TAG "VendorTagDescriptor"

 #include <binder/Parcel.h>
 #include <utils/Errors.h>
 #include <utils/Log.h>
 #include <utils/Mutex.h>
 #include <utils/Vector.h>
 #include <utils/SortedVector.h>
 #include <system/camera_metadata.h>
 #include <camera_metadata_hidden.h>

 #include "camera/VendorTagDescriptor.h"

 #include <stdio.h>
 #include <string.h>

 namespace android {

 extern "C" {

 static int vendor_tag_descriptor_get_tag_count(const vendor_tag_ops_t* v);
 static void vendor_tag_descriptor_get_all_tags(const vendor_tag_ops_t* v, uint32_t* tagArray);
 static const char* vendor_tag_descriptor_get_section_name(const vendor_tag_ops_t* v, uint32_t tag);
 static const char* vendor_tag_descriptor_get_tag_name(const vendor_tag_ops_t* v, uint32_t tag);
 static int vendor_tag_descriptor_get_tag_type(const vendor_tag_ops_t* v, uint32_t tag);

 } /* extern "C" */


 static Mutex sLock;
 static sp<VendorTagDescriptor> sGlobalVendorTagDescriptor;

 VendorTagDescriptor::VendorTagDescriptor() {}

 VendorTagDescriptor::~VendorTagDescriptor() {
     size_t len = mReverseMapping.size();
     for (size_t i = 0; i < len; ++i)  {
         delete mReverseMapping[i];
     }
 }

 status_t VendorTagDescriptor::createDescriptorFromOps(const vendor_tag_ops_t* vOps,
             /*out*/
             sp<VendorTagDescriptor>& descriptor) {
     if (vOps == NULL) {
         ALOGE("%s: vendor_tag_ops argument was NULL.", __FUNCTION__);
         return BAD_VALUE;
     }

     int tagCount = vOps->get_tag_count(vOps);
     if (tagCount < 0 || tagCount > INT32_MAX) {
         ALOGE("%s: tag count %d from vendor ops is invalid.", __FUNCTION__, tagCount);
         return BAD_VALUE;
     }

     Vector<uint32_t> tagArray;
     LOG_ALWAYS_FATAL_IF(tagArray.resize(tagCount) != tagCount,
             "%s: too many (%u) vendor tags defined.", __FUNCTION__, tagCount);

     vOps->get_all_tags(vOps, /*out*/tagArray.editArray());

     sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
     desc->mTagCount = tagCount;

     SortedVector<String8> sections;
     KeyedVector<uint32_t, String8> tagToSectionMap;

     for (size_t i = 0; i < static_cast<size_t>(tagCount); ++i) {
         uint32_t tag = tagArray[i];
         if (tag < CAMERA_METADATA_VENDOR_TAG_BOUNDARY) {
             ALOGE("%s: vendor tag %d not in vendor tag section.", __FUNCTION__, tag);
             return BAD_VALUE;
         }
         const char *tagName = vOps->get_tag_name(vOps, tag);
         if (tagName == NULL) {
             ALOGE("%s: no tag name defined for vendor tag %d.", __FUNCTION__, tag);
             return BAD_VALUE;
         }
         desc->mTagToNameMap.add(tag, String8(tagName));
         const char *sectionName = vOps->get_section_name(vOps, tag);
         if (sectionName == NULL) {
             ALOGE("%s: no section name defined for vendor tag %d.", __FUNCTION__, tag);
             return BAD_VALUE;
         }

         String8 sectionString(sectionName);

         sections.add(sectionString);
         tagToSectionMap.add(tag, sectionString);

         int tagType = vOps->get_tag_type(vOps, tag);
         if (tagType < 0 || tagType >= NUM_TYPES) {
             ALOGE("%s: tag type %d from vendor ops does not exist.", __FUNCTION__, tagType);
             return BAD_VALUE;
         }
         desc->mTagToTypeMap.add(tag, tagType);
     }

     desc->mSections = sections;

     for (size_t i = 0; i < static_cast<size_t>(tagCount); ++i) {
         uint32_t tag = tagArray[i];
         String8 sectionString = tagToSectionMap.valueFor(tag);

         // Set up tag to section index map
         ssize_t index = sections.indexOf(sectionString);
         LOG_ALWAYS_FATAL_IF(index < 0, "index %zd must be non-negative", index);
         desc->mTagToSectionMap.add(tag, static_cast<uint32_t>(index));

         // Set up reverse mapping
         ssize_t reverseIndex = -1;
         if ((reverseIndex = desc->mReverseMapping.indexOfKey(sectionString)) < 0) {
             KeyedVector<String8, uint32_t>* nameMapper = new KeyedVector<String8, uint32_t>();
             reverseIndex = desc->mReverseMapping.add(sectionString, nameMapper);
         }
         desc->mReverseMapping[reverseIndex]->add(desc->mTagToNameMap.valueFor(tag), tag);
     }

     descriptor = desc;
     return OK;
 }

 status_t VendorTagDescriptor::createFromParcel(const Parcel* parcel,
             /*out*/
             sp<VendorTagDescriptor>& descriptor) {
     status_t res = OK;
     if (parcel == NULL) {
         ALOGE("%s: parcel argument was NULL.", __FUNCTION__);
         return BAD_VALUE;
     }

     int32_t tagCount = 0;
     if ((res = parcel->readInt32(&tagCount)) != OK) {
         ALOGE("%s: could not read tag count from parcel", __FUNCTION__);
         return res;
     }

     if (tagCount < 0 || tagCount > INT32_MAX) {
         ALOGE("%s: tag count %d from vendor ops is invalid.", __FUNCTION__, tagCount);
         return BAD_VALUE;
     }

     sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
     desc->mTagCount = tagCount;

     uint32_t tag, sectionIndex;
     uint32_t maxSectionIndex = 0;
     int32_t tagType;
     Vector<uint32_t> allTags;
     for (int32_t i = 0; i < tagCount; ++i) {
         if ((res = parcel->readInt32(reinterpret_cast<int32_t*>(&tag))) != OK) {
             ALOGE("%s: could not read tag id from parcel for index %d", __FUNCTION__, i);
             break;
         }
         if (tag < CAMERA_METADATA_VENDOR_TAG_BOUNDARY) {
             ALOGE("%s: vendor tag %d not in vendor tag section.", __FUNCTION__, tag);
             res = BAD_VALUE;
             break;
         }
         if ((res = parcel->readInt32(&tagType)) != OK) {
             ALOGE("%s: could not read tag type from parcel for tag %d", __FUNCTION__, tag);
             break;
         }
         if (tagType < 0 || tagType >= NUM_TYPES) {
             ALOGE("%s: tag type %d from vendor ops does not exist.", __FUNCTION__, tagType);
             res = BAD_VALUE;
             break;
         }
         String8 tagName = parcel->readString8();
         if (tagName.isEmpty()) {
             ALOGE("%s: parcel tag name was NULL for tag %d.", __FUNCTION__, tag);
             res = NOT_ENOUGH_DATA;
             break;
         }

         if ((res = parcel->readInt32(reinterpret_cast<int32_t*>(&sectionIndex))) != OK) {
             ALOGE("%s: could not read section index for tag %d.", __FUNCTION__, tag);
             break;
         }

         maxSectionIndex = (maxSectionIndex >= sectionIndex) ? maxSectionIndex : sectionIndex;

         allTags.add(tag);
         desc->mTagToNameMap.add(tag, tagName);
         desc->mTagToSectionMap.add(tag, sectionIndex);
         desc->mTagToTypeMap.add(tag, tagType);
     }

     if (res != OK) {
         return res;
     }

     size_t sectionCount = 0;
     if (tagCount > 0) {
         if ((res = parcel->readInt32(reinterpret_cast<int32_t*>(&sectionCount))) != OK) {
             ALOGE("%s: could not read section count for.", __FUNCTION__);
             return res;
         }
         if (sectionCount < (maxSectionIndex + 1)) {
             ALOGE("%s: Incorrect number of sections defined, received %zu, needs %d.",
                     __FUNCTION__, sectionCount, (maxSectionIndex + 1));
             return BAD_VALUE;
         }
         LOG_ALWAYS_FATAL_IF(desc->mSections.setCapacity(sectionCount) <= 0,
                 "Vector capacity must be positive");
         for (size_t i = 0; i < sectionCount; ++i) {
             String8 sectionName = parcel->readString8();
             if (sectionName.isEmpty()) {
                 ALOGE("%s: parcel section name was NULL for section %zu.",
                       __FUNCTION__, i);
                 return NOT_ENOUGH_DATA;
             }
             desc->mSections.add(sectionName);
         }
     }

     LOG_ALWAYS_FATAL_IF(static_cast<size_t>(tagCount) != allTags.size(),
                         "tagCount must be the same as allTags size");
     // Set up reverse mapping
     for (size_t i = 0; i < static_cast<size_t>(tagCount); ++i) {
         uint32_t tag = allTags[i];
         String8 sectionString = desc->mSections[desc->mTagToSectionMap.valueFor(tag)];

         ssize_t reverseIndex = -1;
         if ((reverseIndex = desc->mReverseMapping.indexOfKey(sectionString)) < 0) {
             KeyedVector<String8, uint32_t>* nameMapper = new KeyedVector<String8, uint32_t>();
             reverseIndex = desc->mReverseMapping.add(sectionString, nameMapper);
         }
         desc->mReverseMapping[reverseIndex]->add(desc->mTagToNameMap.valueFor(tag), tag);
     }

     descriptor = desc;
     return res;
 }

 int VendorTagDescriptor::getTagCount() const {
     size_t size = mTagToNameMap.size();
     if (size == 0) {
         return VENDOR_TAG_COUNT_ERR;
     }
     return size;
 }

 void VendorTagDescriptor::getTagArray(uint32_t* tagArray) const {
     size_t size = mTagToNameMap.size();
     for (size_t i = 0; i < size; ++i) {
         tagArray[i] = mTagToNameMap.keyAt(i);
     }
 }

 const char* VendorTagDescriptor::getSectionName(uint32_t tag) const {
     ssize_t index = mTagToSectionMap.indexOfKey(tag);
     if (index < 0) {
         return VENDOR_SECTION_NAME_ERR;
     }
     return mSections[mTagToSectionMap.valueAt(index)].string();
 }

 const char* VendorTagDescriptor::getTagName(uint32_t tag) const {
     ssize_t index = mTagToNameMap.indexOfKey(tag);
     if (index < 0) {
         return VENDOR_TAG_NAME_ERR;
     }
     return mTagToNameMap.valueAt(index).string();
 }

 int VendorTagDescriptor::getTagType(uint32_t tag) const {
     ssize_t index = mTagToNameMap.indexOfKey(tag);
     if (index < 0) {
         return VENDOR_TAG_TYPE_ERR;
     }
     return mTagToTypeMap.valueFor(tag);
 }

 status_t VendorTagDescriptor::writeToParcel(Parcel* parcel) const {
     status_t res = OK;
     if (parcel == NULL) {
         ALOGE("%s: parcel argument was NULL.", __FUNCTION__);
         return BAD_VALUE;
     }

     if ((res = parcel->writeInt32(mTagCount)) != OK) {
         return res;
     }

     size_t size = mTagToNameMap.size();
     uint32_t tag, sectionIndex;
     int32_t tagType;
     for (size_t i = 0; i < size; ++i) {
         tag = mTagToNameMap.keyAt(i);
         String8 tagName = mTagToNameMap[i];
         sectionIndex = mTagToSectionMap.valueFor(tag);
         tagType = mTagToTypeMap.valueFor(tag);
         if ((res = parcel->writeInt32(tag)) != OK) break;
         if ((res = parcel->writeInt32(tagType)) != OK) break;
         if ((res = parcel->writeString8(tagName)) != OK) break;
         if ((res = parcel->writeInt32(sectionIndex)) != OK) break;
     }

     size_t numSections = mSections.size();
     if (numSections > 0) {
         if ((res = parcel->writeInt32(numSections)) != OK) return res;
         for (size_t i = 0; i < numSections; ++i) {
             if ((res = parcel->writeString8(mSections[i])) != OK) return res;
         }
     }

     return res;
 }

 SortedVector<String8> VendorTagDescriptor::getAllSectionNames() const {
     return mSections;
 }

 status_t VendorTagDescriptor::lookupTag(String8 name, String8 section, /*out*/uint32_t* tag) const {
     ssize_t index = mReverseMapping.indexOfKey(section);
     if (index < 0) {
         ALOGE("%s: Section '%s' does not exist.", __FUNCTION__, section.string());
         return BAD_VALUE;
     }

     ssize_t nameIndex = mReverseMapping[index]->indexOfKey(name);
     if (nameIndex < 0) {
         ALOGE("%s: Tag name '%s' does not exist.", __FUNCTION__, name.string());
         return BAD_VALUE;
     }

     if (tag != NULL) {
         *tag = mReverseMapping[index]->valueAt(nameIndex);
     }
     return OK;
 }

 void VendorTagDescriptor::dump(int fd, int verbosity, int indentation) const {

     size_t size = mTagToNameMap.size();
     if (size == 0) {
         dprintf(fd, "%*sDumping configured vendor tag descriptors: None set\n",
                 indentation, "");
         return;
     }

     dprintf(fd, "%*sDumping configured vendor tag descriptors: %zu entries\n",
             indentation, "", size);
     for (size_t i = 0; i < size; ++i) {
         uint32_t tag =  mTagToNameMap.keyAt(i);

         if (verbosity < 1) {
             dprintf(fd, "%*s0x%x\n", indentation + 2, "", tag);
             continue;
         }
         String8 name = mTagToNameMap.valueAt(i);
         uint32_t sectionId = mTagToSectionMap.valueFor(tag);
         String8 sectionName = mSections[sectionId];
         int type = mTagToTypeMap.valueFor(tag);
         const char* typeName = (type >= 0 && type < NUM_TYPES) ?
                 camera_metadata_type_names[type] : "UNKNOWN";
         dprintf(fd, "%*s0x%x (%s) with type %d (%s) defined in section %s\n", indentation + 2,
             "", tag, name.string(), type, typeName, sectionName.string());
     }

 }

 status_t VendorTagDescriptor::setAsGlobalVendorTagDescriptor(const sp<VendorTagDescriptor>& desc) {
     status_t res = OK;
     Mutex::Autolock al(sLock);
     sGlobalVendorTagDescriptor = desc;

     vendor_tag_ops_t* opsPtr = NULL;
     if (desc != NULL) {
         opsPtr = &(desc->mVendorOps);
         opsPtr->get_tag_count = vendor_tag_descriptor_get_tag_count;
         opsPtr->get_all_tags = vendor_tag_descriptor_get_all_tags;
         opsPtr->get_section_name = vendor_tag_descriptor_get_section_name;
         opsPtr->get_tag_name = vendor_tag_descriptor_get_tag_name;
         opsPtr->get_tag_type = vendor_tag_descriptor_get_tag_type;
     }
     if((res = set_camera_metadata_vendor_ops(opsPtr)) != OK) {
         ALOGE("%s: Could not set vendor tag descriptor, received error %s (%d)."
                 , __FUNCTION__, strerror(-res), res);
     }
     return res;
 }

 void VendorTagDescriptor::clearGlobalVendorTagDescriptor() {
     Mutex::Autolock al(sLock);
     set_camera_metadata_vendor_ops(NULL);
     sGlobalVendorTagDescriptor.clear();
 }

 sp<VendorTagDescriptor> VendorTagDescriptor::getGlobalVendorTagDescriptor() {
     Mutex::Autolock al(sLock);
     return sGlobalVendorTagDescriptor;
 }

 extern "C" {

 int vendor_tag_descriptor_get_tag_count(const vendor_tag_ops_t* /*v*/) {
     Mutex::Autolock al(sLock);
     if (sGlobalVendorTagDescriptor == NULL) {
         ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
         return VENDOR_TAG_COUNT_ERR;
     }
     return sGlobalVendorTagDescriptor->getTagCount();
 }

 void vendor_tag_descriptor_get_all_tags(const vendor_tag_ops_t* /*v*/, uint32_t* tagArray) {
     Mutex::Autolock al(sLock);
     if (sGlobalVendorTagDescriptor == NULL) {
         ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
         return;
     }
     sGlobalVendorTagDescriptor->getTagArray(tagArray);
 }

 const char* vendor_tag_descriptor_get_section_name(const vendor_tag_ops_t* /*v*/, uint32_t tag) {
     Mutex::Autolock al(sLock);
     if (sGlobalVendorTagDescriptor == NULL) {
         ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
         return VENDOR_SECTION_NAME_ERR;
     }
     return sGlobalVendorTagDescriptor->getSectionName(tag);
 }

 const char* vendor_tag_descriptor_get_tag_name(const vendor_tag_ops_t* /*v*/, uint32_t tag) {
     Mutex::Autolock al(sLock);
     if (sGlobalVendorTagDescriptor == NULL) {
         ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
         return VENDOR_TAG_NAME_ERR;
     }
     return sGlobalVendorTagDescriptor->getTagName(tag);
 }

 int vendor_tag_descriptor_get_tag_type(const vendor_tag_ops_t* /*v*/, uint32_t tag) {
     Mutex::Autolock al(sLock);
     if (sGlobalVendorTagDescriptor == NULL) {
         ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
         return VENDOR_TAG_TYPE_ERR;
     }
     return sGlobalVendorTagDescriptor->getTagType(tag);
 }

 } /* extern "C" */
 } /* namespace android */
	/*
	* Copyright (C) 2014 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_TAG "VendorTagDescriptor"

	#include <binder/Parcel.h>
	#include <utils/Errors.h>
	#include <utils/Log.h>
	#include <utils/Mutex.h>
	#include <utils/Vector.h>
	#include <utils/SortedVector.h>
	#include <system/camera_metadata.h>
	#include <camera_metadata_hidden.h>

	#include "camera/VendorTagDescriptor.h"

	#include <stdio.h>
	#include <string.h>

	namespace android {

	extern "C" {

	static int vendor_tag_descriptor_get_tag_count(const vendor_tag_ops_t* v);
	static void vendor_tag_descriptor_get_all_tags(const vendor_tag_ops_t* v, uint32_t* tagArray);
	static const char* vendor_tag_descriptor_get_section_name(const vendor_tag_ops_t* v, uint32_t tag);
	static const char* vendor_tag_descriptor_get_tag_name(const vendor_tag_ops_t* v, uint32_t tag);
	static int vendor_tag_descriptor_get_tag_type(const vendor_tag_ops_t* v, uint32_t tag);

	} /* extern "C" */


	static Mutex sLock;
	static sp<VendorTagDescriptor> sGlobalVendorTagDescriptor;

	VendorTagDescriptor::VendorTagDescriptor() {}

	VendorTagDescriptor::~VendorTagDescriptor() {
	size_t len = mReverseMapping.size();
	for (size_t i = 0; i < len; ++i) {
	delete mReverseMapping[i];
	}
	}

	status_t VendorTagDescriptor::createDescriptorFromOps(const vendor_tag_ops_t* vOps,
	/out/
	sp<VendorTagDescriptor>& descriptor) {
	if (vOps == NULL) {
	ALOGE("%s: vendor_tag_ops argument was NULL.", __FUNCTION__);
	return BAD_VALUE;
	}

	int tagCount = vOps->get_tag_count(vOps);
	if (tagCount < 0 \|\| tagCount > INT32_MAX) {
	ALOGE("%s: tag count %d from vendor ops is invalid.", __FUNCTION__, tagCount);
	return BAD_VALUE;
	}

	Vector<uint32_t> tagArray;
	LOG_ALWAYS_FATAL_IF(tagArray.resize(tagCount) != tagCount,
	"%s: too many (%u) vendor tags defined.", __FUNCTION__, tagCount);

	vOps->get_all_tags(vOps, /out/tagArray.editArray());

	sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
	desc->mTagCount = tagCount;

	SortedVector<String8> sections;
	KeyedVector<uint32_t, String8> tagToSectionMap;

	for (size_t i = 0; i < static_cast<size_t>(tagCount); ++i) {
	uint32_t tag = tagArray[i];
	if (tag < CAMERA_METADATA_VENDOR_TAG_BOUNDARY) {
	ALOGE("%s: vendor tag %d not in vendor tag section.", __FUNCTION__, tag);
	return BAD_VALUE;
	}
	const char *tagName = vOps->get_tag_name(vOps, tag);
	if (tagName == NULL) {
	ALOGE("%s: no tag name defined for vendor tag %d.", __FUNCTION__, tag);
	return BAD_VALUE;
	}
	desc->mTagToNameMap.add(tag, String8(tagName));
	const char *sectionName = vOps->get_section_name(vOps, tag);
	if (sectionName == NULL) {
	ALOGE("%s: no section name defined for vendor tag %d.", __FUNCTION__, tag);
	return BAD_VALUE;
	}

	String8 sectionString(sectionName);

	sections.add(sectionString);
	tagToSectionMap.add(tag, sectionString);

	int tagType = vOps->get_tag_type(vOps, tag);
	if (tagType < 0 \|\| tagType >= NUM_TYPES) {
	ALOGE("%s: tag type %d from vendor ops does not exist.", __FUNCTION__, tagType);
	return BAD_VALUE;
	}
	desc->mTagToTypeMap.add(tag, tagType);
	}

	desc->mSections = sections;

	for (size_t i = 0; i < static_cast<size_t>(tagCount); ++i) {
	uint32_t tag = tagArray[i];
	String8 sectionString = tagToSectionMap.valueFor(tag);

	// Set up tag to section index map
	ssize_t index = sections.indexOf(sectionString);
	LOG_ALWAYS_FATAL_IF(index < 0, "index %zd must be non-negative", index);
	desc->mTagToSectionMap.add(tag, static_cast<uint32_t>(index));

	// Set up reverse mapping
	ssize_t reverseIndex = -1;
	if ((reverseIndex = desc->mReverseMapping.indexOfKey(sectionString)) < 0) {
	KeyedVector<String8, uint32_t>* nameMapper = new KeyedVector<String8, uint32_t>();
	reverseIndex = desc->mReverseMapping.add(sectionString, nameMapper);
	}
	desc->mReverseMapping[reverseIndex]->add(desc->mTagToNameMap.valueFor(tag), tag);
	}

	descriptor = desc;
	return OK;
	}

	status_t VendorTagDescriptor::createFromParcel(const Parcel* parcel,
	/out/
	sp<VendorTagDescriptor>& descriptor) {
	status_t res = OK;
	if (parcel == NULL) {
	ALOGE("%s: parcel argument was NULL.", __FUNCTION__);
	return BAD_VALUE;
	}

	int32_t tagCount = 0;
	if ((res = parcel->readInt32(&tagCount)) != OK) {
	ALOGE("%s: could not read tag count from parcel", __FUNCTION__);
	return res;
	}

	if (tagCount < 0 \|\| tagCount > INT32_MAX) {
	ALOGE("%s: tag count %d from vendor ops is invalid.", __FUNCTION__, tagCount);
	return BAD_VALUE;
	}

	sp<VendorTagDescriptor> desc = new VendorTagDescriptor();
	desc->mTagCount = tagCount;

	uint32_t tag, sectionIndex;
	uint32_t maxSectionIndex = 0;
	int32_t tagType;
	Vector<uint32_t> allTags;
	for (int32_t i = 0; i < tagCount; ++i) {
	if ((res = parcel->readInt32(reinterpret_cast<int32_t*>(&tag))) != OK) {
	ALOGE("%s: could not read tag id from parcel for index %d", __FUNCTION__, i);
	break;
	}
	if (tag < CAMERA_METADATA_VENDOR_TAG_BOUNDARY) {
	ALOGE("%s: vendor tag %d not in vendor tag section.", __FUNCTION__, tag);
	res = BAD_VALUE;
	break;
	}
	if ((res = parcel->readInt32(&tagType)) != OK) {
	ALOGE("%s: could not read tag type from parcel for tag %d", __FUNCTION__, tag);
	break;
	}
	if (tagType < 0 \|\| tagType >= NUM_TYPES) {
	ALOGE("%s: tag type %d from vendor ops does not exist.", __FUNCTION__, tagType);
	res = BAD_VALUE;
	break;
	}
	String8 tagName = parcel->readString8();
	if (tagName.isEmpty()) {
	ALOGE("%s: parcel tag name was NULL for tag %d.", __FUNCTION__, tag);
	res = NOT_ENOUGH_DATA;
	break;
	}

	if ((res = parcel->readInt32(reinterpret_cast<int32_t*>(&sectionIndex))) != OK) {
	ALOGE("%s: could not read section index for tag %d.", __FUNCTION__, tag);
	break;
	}

	maxSectionIndex = (maxSectionIndex >= sectionIndex) ? maxSectionIndex : sectionIndex;

	allTags.add(tag);
	desc->mTagToNameMap.add(tag, tagName);
	desc->mTagToSectionMap.add(tag, sectionIndex);
	desc->mTagToTypeMap.add(tag, tagType);
	}

	if (res != OK) {
	return res;
	}

	size_t sectionCount = 0;
	if (tagCount > 0) {
	if ((res = parcel->readInt32(reinterpret_cast<int32_t*>(&sectionCount))) != OK) {
	ALOGE("%s: could not read section count for.", __FUNCTION__);
	return res;
	}
	if (sectionCount < (maxSectionIndex + 1)) {
	ALOGE("%s: Incorrect number of sections defined, received %zu, needs %d.",
	__FUNCTION__, sectionCount, (maxSectionIndex + 1));
	return BAD_VALUE;
	}
	LOG_ALWAYS_FATAL_IF(desc->mSections.setCapacity(sectionCount) <= 0,
	"Vector capacity must be positive");
	for (size_t i = 0; i < sectionCount; ++i) {
	String8 sectionName = parcel->readString8();
	if (sectionName.isEmpty()) {
	ALOGE("%s: parcel section name was NULL for section %zu.",
	__FUNCTION__, i);
	return NOT_ENOUGH_DATA;
	}
	desc->mSections.add(sectionName);
	}
	}

	LOG_ALWAYS_FATAL_IF(static_cast<size_t>(tagCount) != allTags.size(),
	"tagCount must be the same as allTags size");
	// Set up reverse mapping
	for (size_t i = 0; i < static_cast<size_t>(tagCount); ++i) {
	uint32_t tag = allTags[i];
	String8 sectionString = desc->mSections[desc->mTagToSectionMap.valueFor(tag)];

	ssize_t reverseIndex = -1;
	if ((reverseIndex = desc->mReverseMapping.indexOfKey(sectionString)) < 0) {
	KeyedVector<String8, uint32_t>* nameMapper = new KeyedVector<String8, uint32_t>();
	reverseIndex = desc->mReverseMapping.add(sectionString, nameMapper);
	}
	desc->mReverseMapping[reverseIndex]->add(desc->mTagToNameMap.valueFor(tag), tag);
	}

	descriptor = desc;
	return res;
	}

	int VendorTagDescriptor::getTagCount() const {
	size_t size = mTagToNameMap.size();
	if (size == 0) {
	return VENDOR_TAG_COUNT_ERR;
	}
	return size;
	}

	void VendorTagDescriptor::getTagArray(uint32_t* tagArray) const {
	size_t size = mTagToNameMap.size();
	for (size_t i = 0; i < size; ++i) {
	tagArray[i] = mTagToNameMap.keyAt(i);
	}
	}

	const char* VendorTagDescriptor::getSectionName(uint32_t tag) const {
	ssize_t index = mTagToSectionMap.indexOfKey(tag);
	if (index < 0) {
	return VENDOR_SECTION_NAME_ERR;
	}
	return mSections[mTagToSectionMap.valueAt(index)].string();
	}

	const char* VendorTagDescriptor::getTagName(uint32_t tag) const {
	ssize_t index = mTagToNameMap.indexOfKey(tag);
	if (index < 0) {
	return VENDOR_TAG_NAME_ERR;
	}
	return mTagToNameMap.valueAt(index).string();
	}

	int VendorTagDescriptor::getTagType(uint32_t tag) const {
	ssize_t index = mTagToNameMap.indexOfKey(tag);
	if (index < 0) {
	return VENDOR_TAG_TYPE_ERR;
	}
	return mTagToTypeMap.valueFor(tag);
	}

	status_t VendorTagDescriptor::writeToParcel(Parcel* parcel) const {
	status_t res = OK;
	if (parcel == NULL) {
	ALOGE("%s: parcel argument was NULL.", __FUNCTION__);
	return BAD_VALUE;
	}

	if ((res = parcel->writeInt32(mTagCount)) != OK) {
	return res;
	}

	size_t size = mTagToNameMap.size();
	uint32_t tag, sectionIndex;
	int32_t tagType;
	for (size_t i = 0; i < size; ++i) {
	tag = mTagToNameMap.keyAt(i);
	String8 tagName = mTagToNameMap[i];
	sectionIndex = mTagToSectionMap.valueFor(tag);
	tagType = mTagToTypeMap.valueFor(tag);
	if ((res = parcel->writeInt32(tag)) != OK) break;
	if ((res = parcel->writeInt32(tagType)) != OK) break;
	if ((res = parcel->writeString8(tagName)) != OK) break;
	if ((res = parcel->writeInt32(sectionIndex)) != OK) break;
	}

	size_t numSections = mSections.size();
	if (numSections > 0) {
	if ((res = parcel->writeInt32(numSections)) != OK) return res;
	for (size_t i = 0; i < numSections; ++i) {
	if ((res = parcel->writeString8(mSections[i])) != OK) return res;
	}
	}

	return res;
	}

	SortedVector<String8> VendorTagDescriptor::getAllSectionNames() const {
	return mSections;
	}

	status_t VendorTagDescriptor::lookupTag(String8 name, String8 section, /out/uint32_t* tag) const {
	ssize_t index = mReverseMapping.indexOfKey(section);
	if (index < 0) {
	ALOGE("%s: Section '%s' does not exist.", __FUNCTION__, section.string());
	return BAD_VALUE;
	}

	ssize_t nameIndex = mReverseMapping[index]->indexOfKey(name);
	if (nameIndex < 0) {
	ALOGE("%s: Tag name '%s' does not exist.", __FUNCTION__, name.string());
	return BAD_VALUE;
	}

	if (tag != NULL) {
	*tag = mReverseMapping[index]->valueAt(nameIndex);
	}
	return OK;
	}

	void VendorTagDescriptor::dump(int fd, int verbosity, int indentation) const {

	size_t size = mTagToNameMap.size();
	if (size == 0) {
	dprintf(fd, "%*sDumping configured vendor tag descriptors: None set\n",
	indentation, "");
	return;
	}

	dprintf(fd, "%*sDumping configured vendor tag descriptors: %zu entries\n",
	indentation, "", size);
	for (size_t i = 0; i < size; ++i) {
	uint32_t tag = mTagToNameMap.keyAt(i);

	if (verbosity < 1) {
	dprintf(fd, "%*s0x%x\n", indentation + 2, "", tag);
	continue;
	}
	String8 name = mTagToNameMap.valueAt(i);
	uint32_t sectionId = mTagToSectionMap.valueFor(tag);
	String8 sectionName = mSections[sectionId];
	int type = mTagToTypeMap.valueFor(tag);
	const char* typeName = (type >= 0 && type < NUM_TYPES) ?
	camera_metadata_type_names[type] : "UNKNOWN";
	dprintf(fd, "%*s0x%x (%s) with type %d (%s) defined in section %s\n", indentation + 2,
	"", tag, name.string(), type, typeName, sectionName.string());
	}

	}

	status_t VendorTagDescriptor::setAsGlobalVendorTagDescriptor(const sp<VendorTagDescriptor>& desc) {
	status_t res = OK;
	Mutex::Autolock al(sLock);
	sGlobalVendorTagDescriptor = desc;

	vendor_tag_ops_t* opsPtr = NULL;
	if (desc != NULL) {
	opsPtr = &(desc->mVendorOps);
	opsPtr->get_tag_count = vendor_tag_descriptor_get_tag_count;
	opsPtr->get_all_tags = vendor_tag_descriptor_get_all_tags;
	opsPtr->get_section_name = vendor_tag_descriptor_get_section_name;
	opsPtr->get_tag_name = vendor_tag_descriptor_get_tag_name;
	opsPtr->get_tag_type = vendor_tag_descriptor_get_tag_type;
	}
	if((res = set_camera_metadata_vendor_ops(opsPtr)) != OK) {
	ALOGE("%s: Could not set vendor tag descriptor, received error %s (%d)."
	, __FUNCTION__, strerror(-res), res);
	}
	return res;
	}

	void VendorTagDescriptor::clearGlobalVendorTagDescriptor() {
	Mutex::Autolock al(sLock);
	set_camera_metadata_vendor_ops(NULL);
	sGlobalVendorTagDescriptor.clear();
	}

	sp<VendorTagDescriptor> VendorTagDescriptor::getGlobalVendorTagDescriptor() {
	Mutex::Autolock al(sLock);
	return sGlobalVendorTagDescriptor;
	}

	extern "C" {

	int vendor_tag_descriptor_get_tag_count(const vendor_tag_ops_t* /v/) {
	Mutex::Autolock al(sLock);
	if (sGlobalVendorTagDescriptor == NULL) {
	ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
	return VENDOR_TAG_COUNT_ERR;
	}
	return sGlobalVendorTagDescriptor->getTagCount();
	}

	void vendor_tag_descriptor_get_all_tags(const vendor_tag_ops_t* /v/, uint32_t* tagArray) {
	Mutex::Autolock al(sLock);
	if (sGlobalVendorTagDescriptor == NULL) {
	ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
	return;
	}
	sGlobalVendorTagDescriptor->getTagArray(tagArray);
	}

	const char* vendor_tag_descriptor_get_section_name(const vendor_tag_ops_t* /v/, uint32_t tag) {
	Mutex::Autolock al(sLock);
	if (sGlobalVendorTagDescriptor == NULL) {
	ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
	return VENDOR_SECTION_NAME_ERR;
	}
	return sGlobalVendorTagDescriptor->getSectionName(tag);
	}

	const char* vendor_tag_descriptor_get_tag_name(const vendor_tag_ops_t* /v/, uint32_t tag) {
	Mutex::Autolock al(sLock);
	if (sGlobalVendorTagDescriptor == NULL) {
	ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
	return VENDOR_TAG_NAME_ERR;
	}
	return sGlobalVendorTagDescriptor->getTagName(tag);
	}

	int vendor_tag_descriptor_get_tag_type(const vendor_tag_ops_t* /v/, uint32_t tag) {
	Mutex::Autolock al(sLock);
	if (sGlobalVendorTagDescriptor == NULL) {
	ALOGE("%s: Vendor tag descriptor not initialized.", __FUNCTION__);
	return VENDOR_TAG_TYPE_ERR;
	}
	return sGlobalVendorTagDescriptor->getTagType(tag);
	}

	} /* extern "C" */
	} /* namespace android */