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306 lines
9.4 KiB
306 lines
9.4 KiB
/*
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* Copyright Samsung Electronics Co.,LTD.
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* Copyright (C) 2015 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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#ifndef __HARDWARE_SAMSUNG_SLSI_EXYNOS_IFDWRITER_H__
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#define __HARDWARE_SAMSUNG_SLSI_EXYNOS_IFDWRITER_H__
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#include "hwjpeg-internal.h"
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class CEndianessChecker {
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bool __little;
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public:
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CEndianessChecker();
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operator bool() { return __little; }
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};
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#ifndef __LITTLE_ENDIAN__
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extern CEndianessChecker __LITTLE_ENDIAN__;
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#endif
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template <typename T>
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char *WriteDataInBig(char *p, T val)
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{
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if (sizeof(val) == 1) {
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*p++ = val;
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} else if (__LITTLE_ENDIAN__) {
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switch (sizeof(val)) {
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case 2:
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*p++ = static_cast<char>((val >> 8) & 0xFF);
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*p++ = static_cast<char>(val & 0xFF);
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break;
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case 4:
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*p++ = static_cast<char>((val >> 24) & 0xFF);
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*p++ = static_cast<char>((val >> 16) & 0xFF);
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*p++ = static_cast<char>((val >> 8) & 0xFF);
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*p++ = static_cast<char>(val & 0xFF);
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break;
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}
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} else {
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switch (sizeof(val)) {
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case 2:
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*p++ = static_cast<char>(val & 0xFF);
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*p++ = static_cast<char>((val >> 8) & 0xFF);
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break;
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case 4:
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*p++ = static_cast<char>(val & 0xFF);
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*p++ = static_cast<char>((val >> 8) & 0xFF);
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*p++ = static_cast<char>((val >> 16) & 0xFF);
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*p++ = static_cast<char>((val >> 24) & 0xFF);
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break;
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}
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}
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return p;
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}
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template <typename T>
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char *WriteData(char *p, T val)
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{
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const char *pt = reinterpret_cast<char *>(&val);
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for (size_t i = 0; i < sizeof(val); i++)
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*p++ = *pt++;
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return p;
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}
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class CIFDWriter {
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char *m_pBase;
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char *m_pIFDBase;
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char *m_pValue;
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unsigned int m_nTags;
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char *WriteOffset(char *target, char *addr) {
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uint32_t val = Offset(addr);
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const char *p = reinterpret_cast<char *>(&val);
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*target++ = *p++;
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*target++ = *p++;
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*target++ = *p++;
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*target++ = *p++;
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return target;
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}
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void WriteTagTypeCount(uint16_t tag, uint16_t type, uint32_t count) {
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const char *p = reinterpret_cast<char *>(&tag);
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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p = reinterpret_cast<char *>(&type);
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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p = reinterpret_cast<char *>(&count);
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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m_nTags--;
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}
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public:
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CIFDWriter(char *offset_base, char *ifdbase, uint16_t tagcount) {
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m_nTags = tagcount;
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m_pBase = offset_base;
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m_pIFDBase = ifdbase;
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m_pValue = m_pIFDBase + IFD_FIELDCOUNT_SIZE +
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IFD_FIELD_SIZE * tagcount + IFD_NEXTIFDOFFSET_SIZE;
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// COUNT field of IFD
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const char *pval = reinterpret_cast<char *>(&m_nTags);
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*m_pIFDBase++ = *pval++;
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*m_pIFDBase++ = *pval++;
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}
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uint32_t Offset(char *p) {
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return static_cast<uint32_t>(PTR_TO_ULONG(p) - PTR_TO_ULONG(m_pBase));
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}
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void WriteByte(uint16_t tag, uint32_t count, const uint8_t value[]) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_BYTE, count);
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if (count > IFD_VALOFF_SIZE) {
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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for (uint32_t i = 0; i < count; i++) {
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*m_pValue++ = static_cast<char>(value[i]);
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}
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} else {
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for (uint32_t i = 0; i < count; i++)
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*m_pIFDBase++ = static_cast<char>(value[i]);
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m_pIFDBase += IFD_VALOFF_SIZE - count;
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}
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}
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void WriteShort(uint16_t tag, uint32_t count, const uint16_t value[]) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_SHORT, count);
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const char *p = reinterpret_cast<const char *>(&value[0]);
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if (count > (IFD_VALOFF_SIZE / sizeof(value[0]))) {
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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for (uint32_t i = 0; i < count; i++) {
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*m_pValue++ = *p++;
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*m_pValue++ = *p++;
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}
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} else {
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for (uint32_t i = 0; i < count; i++) {
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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}
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m_pIFDBase += IFD_VALOFF_SIZE - count * sizeof(value[0]);
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}
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}
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void WriteLong(uint16_t tag, uint32_t count, const uint32_t value[]) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_LONG, count);
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const char *p = reinterpret_cast<const char *>(&value[0]);
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if (count > (IFD_VALOFF_SIZE / sizeof(value[0]))) {
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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*m_pValue++ = *p++;
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} else {
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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*m_pIFDBase++ = *p++;
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}
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}
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void WriteASCII(uint16_t tag, uint32_t count, const char *value) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_ASCII, count);
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if (count > IFD_VALOFF_SIZE) {
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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memcpy(m_pValue, value, count);
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m_pValue[count - 1] = '\0';
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m_pValue += count;
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} else {
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for (uint32_t i = 0; i < count; i++)
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*m_pIFDBase++ = value[i];
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*(m_pIFDBase - 1) = '\0';
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m_pIFDBase += IFD_VALOFF_SIZE - count;
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}
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}
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void WriteCString(uint16_t tag, uint32_t count, const char *string) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_ASCII, count);
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if (count > IFD_VALOFF_SIZE) {
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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strncpy(m_pValue, string, count);
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m_pValue[count - 1] = '\0';
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m_pValue += count;
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} else {
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uint32_t i;
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for (i = 0; (i < (count - 1)) && (string[i] != '\0'); i++)
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*m_pIFDBase++ = string[i];
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while (i++ < count)
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*m_pIFDBase++ = '\0';
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m_pIFDBase += IFD_VALOFF_SIZE - count;
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}
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}
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void WriteRational(uint16_t tag, uint32_t count, const rational_t value[]) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_RATIONAL, count);
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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for (uint32_t i = 0; i < count; i++) {
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const char *pt;
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pt = reinterpret_cast<const char *>(&value[i].num);
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*m_pValue++ = *pt++;
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*m_pValue++ = *pt++;
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*m_pValue++ = *pt++;
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*m_pValue++ = *pt++;
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pt = reinterpret_cast<const char *>(&value[i].den);
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*m_pValue++ = *pt++;
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*m_pValue++ = *pt++;
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*m_pValue++ = *pt++;
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*m_pValue++ = *pt++;
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}
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}
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void WriteSRational(uint16_t tag, uint32_t count, const srational_t value[]) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_SRATIONAL, count);
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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const char *pt = reinterpret_cast<const char *>(value);
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for (uint32_t i = 0; i < sizeof(srational_t) * count; i++)
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*m_pValue++ = *pt++;
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}
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void WriteUndef(uint16_t tag, uint32_t count, const unsigned char *value) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_UNDEFINED, count);
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if (count > IFD_VALOFF_SIZE) {
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m_pIFDBase = WriteOffset(m_pIFDBase, m_pValue);
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memcpy(m_pValue, value, count);
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m_pValue += count;
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} else {
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for (uint32_t i = 0; i < count; i++)
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*m_pIFDBase++ = static_cast<char>(value[i]);
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m_pIFDBase += IFD_VALOFF_SIZE - count;
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}
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}
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char *BeginSubIFD(uint16_t tag) {
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ALOG_ASSERT(m_nTags == 0);
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WriteTagTypeCount(tag, EXIF_TYPE_LONG, 1);
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uint32_t offset = Offset(m_pValue);
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const char *poff = reinterpret_cast<char *>(&offset);
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*m_pIFDBase++ = *poff++;
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*m_pIFDBase++ = *poff++;
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*m_pIFDBase++ = *poff++;
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*m_pIFDBase++ = *poff++;
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return m_pValue;
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}
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void EndSubIFD(char *end_of_subIFD) { m_pValue = end_of_subIFD; }
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void CancelSubIFD() { m_pIFDBase -= IFD_FIELD_SIZE; }
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void Finish(bool last) {
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ALOG_ASSERT(m_nTags > 0);
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uint32_t offset = last ? 0 : Offset(m_pValue);
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const char *pv = reinterpret_cast<char *>(&offset);
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*m_pIFDBase++ = *pv++;
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*m_pIFDBase++ = *pv++;
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*m_pIFDBase++ = *pv++;
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*m_pIFDBase++ = *pv++;
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}
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char *GetNextIFDBase() { return m_pValue; }
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char *GetNextTagAddress() { return m_pIFDBase; }
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};
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#endif //__HARDWARE_SAMSUNG_SLSI_EXYNOS_IFDWRITER_H__
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