/*
 * Copyright (C) 2018 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_STAGEFRIGHT_C2PARAM_INTERNAL_H_
#define ANDROID_STAGEFRIGHT_C2PARAM_INTERNAL_H_

#include <C2Param.h>

struct C2_HIDE _C2ParamInspector {
    inline static uint32_t GetOffset(const C2FieldDescriptor &fd) {
        return fd._mFieldId._mOffset;
    }

    inline static void SetOffset(C2FieldDescriptor &fd, uint32_t offset) {
        fd._mFieldId._mOffset = offset;
    }

    inline static uint32_t GetEndOffset(const C2FieldDescriptor &fd, uint32_t paramSize = 0) {
        uint32_t endOffset = fd._mFieldId._mOffset + fd._mExtent * fd._mFieldId._mSize;
        /// for flex parameters return paramSize if given
        return fd._mExtent ? endOffset : std::max(endOffset, paramSize);
    }

    inline static uint32_t GetSize(const C2FieldDescriptor &fd) {
        return fd._mFieldId._mSize;
    }

    inline static uint32_t GetIndex(const C2ParamField &pf) {
        return pf._mIndex;
    }

    inline static uint32_t GetOffset(const C2ParamField &pf) {
        return pf._mFieldId._mOffset;
    }

    inline static uint32_t GetSize(const C2ParamField &pf) {
        return pf._mFieldId._mSize;
    }

    inline static uint32_t GetOffset(const _C2FieldId &f) {
        return f._mOffset;
    }

    inline static uint32_t GetSize(const _C2FieldId &f) {
        return f._mSize;
    }

    inline static _C2FieldId GetField(const C2FieldDescriptor &fd) {
        return fd._mFieldId;
    }

    inline static uint32_t GetAttrib(const C2ParamDescriptor &pd) {
        return pd._mAttrib;
    }

    inline static _C2FieldId GetField(const C2ParamField &pf) {
        return pf._mFieldId;
    }

    inline static
    C2ParamField CreateParamField(C2Param::Index index, uint32_t offset, uint32_t size) {
        return C2ParamField(index, offset, size);
    }

    inline static
    C2ParamField CreateParamField(C2Param::Index index, _C2FieldId field) {
        return C2ParamField(index, field._mOffset, field._mSize);
    }

    inline static
    void TrimParam(C2Param *param, uint32_t newSize) {
        if (param && *param && param->size() > newSize && newSize >= sizeof(C2Param)) {
            param->_mSize = newSize;
        }
    }

    inline static void AddNamedValues(
            C2FieldDescriptor &fd, C2FieldDescriptor::NamedValuesType &&namedValues) {
        fd._mNamedValues = std::move(namedValues);
    }

    inline static
    C2StructDescriptor CreateStructDescriptor(C2Param::CoreIndex index,
                                        std::vector<C2FieldDescriptor> &&fields) {
        return C2StructDescriptor(index, std::move(fields));
    }

    inline static
    C2FieldDescriptor OffsetFieldDescriptor(const C2FieldDescriptor &fd, size_t offset) {
        return C2FieldDescriptor(fd, offset);
    }

    // expose attributes
    typedef C2ParamDescriptor::attrib_t attrib_t;
};

#endif // ANDROID_STAGEFRIGHT_C2PARAM_INTERNAL_H_