xref: /frameworks/av/media/libstagefright/include/media/stagefright/foundation/ByteUtils.h

/*
 * Copyright (C) 2017 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 BYTE_UTILS_H

#define BYTE_UTILS_H

#include <arpa/inet.h>

namespace android {

constexpr int FOURCC(unsigned char c1, unsigned char c2, unsigned char c3, unsigned char c4) {
    return ((c1) << 24 | (c2) << 16 | (c3) << 8 | (c4));
}

template <size_t N>
constexpr int32_t FOURCC(const char (&s) [N]) {
    static_assert(N == 5, "fourcc: wrong length");
    return
            (unsigned char) s[0] << 24 |
            (unsigned char) s[1] << 16 |
            (unsigned char) s[2] << 8 |
            (unsigned char) s[3] << 0;
}


uint16_t U16_AT(const uint8_t *ptr);
uint32_t U32_AT(const uint8_t *ptr);
uint64_t U64_AT(const uint8_t *ptr);

uint16_t U16LE_AT(const uint8_t *ptr);
uint32_t U32LE_AT(const uint8_t *ptr);
uint64_t U64LE_AT(const uint8_t *ptr);

uint64_t ntoh64(uint64_t x);
uint64_t hton64(uint64_t x);

void MakeFourCCString(uint32_t x, char *s);

}  // namespace android

#endif  // BYTE_UTILS_H