services/camera/libcameraservice/common/CameraProviderInfoTemplated.h

/*
 * Copyright (C) 2022 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.
 */
#ifndef ANDROID_SERVERS_CAMERA_CAMERAPROVIDERINFO_TEMPLATEDH
#define ANDROID_SERVERS_CAMERA_CAMERAPROVIDERINFO_TEMPLATEDH

#include "common/CameraProviderManager.h"

namespace android {

template <class VendorTagSectionVectorType, class VendorTagSectionType>
status_t IdlVendorTagDescriptor::createDescriptorFromIdl(
        const VendorTagSectionVectorType& vts,
        sp<VendorTagDescriptor>& descriptor) {

    int tagCount = 0;

    for (size_t s = 0; s < vts.size(); s++) {
        tagCount += vts[s].tags.size();
    }

    if (tagCount < 0 || tagCount > INT32_MAX) {
        ALOGE("%s: tag count %d from vendor tag sections 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);
    sp<IdlVendorTagDescriptor> desc = new IdlVendorTagDescriptor();
    desc->mTagCount = tagCount;

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

    int idx = 0;
    for (size_t s = 0; s < vts.size(); s++) {
        const VendorTagSectionType& section = vts[s];
        const char *sectionName = section.sectionName.c_str();
        if (sectionName == NULL) {
            ALOGE("%s: no section name defined for vendor tag section %zu.", __FUNCTION__, s);
            return BAD_VALUE;
        }
        String8 sectionString(sectionName);
        sections.add(sectionString);

        for (size_t j = 0; j < section.tags.size(); j++) {
            uint32_t tag = section.tags[j].tagId;
            if (tag < CAMERA_METADATA_VENDOR_TAG_BOUNDARY) {
                ALOGE("%s: vendor tag %d not in vendor tag section.", __FUNCTION__, tag);
                return BAD_VALUE;
            }

            tagArray.editItemAt(idx++) = section.tags[j].tagId;

            const char *tagName = section.tags[j].tagName.c_str();
            if (tagName == NULL) {
                ALOGE("%s: no tag name defined for vendor tag %d.", __FUNCTION__, tag);
                return BAD_VALUE;
            }
            desc->mTagToNameMap.add(tag, String8(tagName));
            tagToSectionMap.add(tag, sectionString);

            int tagType = (int) section.tags[j].tagType;
            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 < tagArray.size(); ++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 = std::move(desc);
    return OK;
}


} // namespace android

#endif