66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//#define LOG_NDEBUG 0
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#define LOG_TAG "ByteUtils"
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#include <media/stagefright/foundation/ByteUtils.h>
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namespace android {
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uint16_t U16_AT(const uint8_t *ptr) {
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return ptr[0] << 8 | ptr[1];
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}
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uint32_t U32_AT(const uint8_t *ptr) {
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return ptr[0] << 24 | ptr[1] << 16 | ptr[2] << 8 | ptr[3];
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}
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uint64_t U64_AT(const uint8_t *ptr) {
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return ((uint64_t)U32_AT(ptr)) << 32 | U32_AT(ptr + 4);
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}
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uint16_t U16LE_AT(const uint8_t *ptr) {
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return ptr[0] | (ptr[1] << 8);
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}
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uint32_t U32LE_AT(const uint8_t *ptr) {
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return ptr[3] << 24 | ptr[2] << 16 | ptr[1] << 8 | ptr[0];
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}
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uint64_t U64LE_AT(const uint8_t *ptr) {
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return ((uint64_t)U32LE_AT(ptr + 4)) << 32 | U32LE_AT(ptr);
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}
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// XXX warning: these won't work on big-endian host.
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uint64_t ntoh64(uint64_t x) {
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return ((uint64_t)ntohl(x & 0xffffffff) << 32) | ntohl(x >> 32);
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}
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uint64_t hton64(uint64_t x) {
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return ((uint64_t)htonl(x & 0xffffffff) << 32) | htonl(x >> 32);
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}
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void MakeFourCCString(uint32_t x, char *s) {
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s[0] = x >> 24;
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s[1] = (x >> 16) & 0xff;
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s[2] = (x >> 8) & 0xff;
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s[3] = x & 0xff;
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s[4] = '\0';
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}
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} // namespace android
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