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/*
* Copyright 2014 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.
*/
#include <img_utils/TiffIfd.h>
#include <img_utils/TiffHelpers.h>
#include <img_utils/TiffWriter.h>
#include <img_utils/TagDefinitions.h>
#include <assert.h>
namespace android {
namespace img_utils {
KeyedVector<uint16_t, const TagDefinition_t*> TiffWriter::buildTagMap(
const TagDefinition_t* definitions, size_t length) {
KeyedVector<uint16_t, const TagDefinition_t*> map;
for(size_t i = 0; i < length; ++i) {
map.add(definitions[i].tagId, definitions + i);
}
return map;
}
#define COMPARE(op) \
bool Orderable::operator op (const Orderable& orderable) const { \
return getComparableValue() op orderable.getComparableValue(); \
}
#define ARRAY_SIZE(array) \
(sizeof(array) / sizeof(array[0]))
KeyedVector<uint16_t, const TagDefinition_t*> TiffWriter::sTagMaps[] = {
buildTagMap(TIFF_EP_TAG_DEFINITIONS, ARRAY_SIZE(TIFF_EP_TAG_DEFINITIONS)),
buildTagMap(DNG_TAG_DEFINITIONS, ARRAY_SIZE(DNG_TAG_DEFINITIONS)),
buildTagMap(EXIF_2_3_TAG_DEFINITIONS, ARRAY_SIZE(EXIF_2_3_TAG_DEFINITIONS)),
buildTagMap(TIFF_6_TAG_DEFINITIONS, ARRAY_SIZE(TIFF_6_TAG_DEFINITIONS))
};
TiffWriter::TiffWriter() : mTagMaps(sTagMaps), mNumTagMaps(DEFAULT_NUM_TAG_MAPS) {}
TiffWriter::TiffWriter(KeyedVector<uint16_t, const TagDefinition_t*>* enabledDefinitions,
size_t length) : mTagMaps(enabledDefinitions), mNumTagMaps(length) {}
TiffWriter::~TiffWriter() {}
status_t TiffWriter::write(Output* out, Endianness end) {
status_t ret = OK;
EndianOutput endOut(out, end);
if (mIfd == NULL) {
ALOGE("%s: Tiff header is empty.", __FUNCTION__);
return BAD_VALUE;
}
BAIL_ON_FAIL(writeFileHeader(endOut), ret);
uint32_t offset = FILE_HEADER_SIZE;
sp<TiffIfd> ifd = mIfd;
while(ifd != NULL) {
BAIL_ON_FAIL(ifd->writeData(offset, &endOut), ret);
offset += ifd->getSize();
ifd = ifd->getNextIfd();
}
return ret;
}
const TagDefinition_t* TiffWriter::lookupDefinition(uint16_t tag) const {
const TagDefinition_t* definition = NULL;
for (size_t i = 0; i < mNumTagMaps; ++i) {
ssize_t index = mTagMaps[i].indexOfKey(tag);
if (index >= 0) {
definition = mTagMaps[i][index];
break;
}
}
if (definition == NULL) {
ALOGE("%s: No definition exists for tag with id %x.", __FUNCTION__, tag);
}
return definition;
}
sp<TiffEntry> TiffWriter::getEntry(uint16_t tag, uint32_t ifd) const {
ssize_t index = mNamedIfds.indexOfKey(ifd);
if (index < 0) {
ALOGE("%s: No IFD %d set for this writer.", __FUNCTION__, ifd);
return NULL;
}
return mNamedIfds[index]->getEntry(tag);
}
// TODO: Fix this to handle IFD position in chain/sub-IFD tree
status_t TiffWriter::addEntry(const sp<TiffEntry>& entry) {
uint16_t tag = entry->getTag();
const TagDefinition_t* definition = lookupDefinition(tag);
if (definition == NULL) {
return BAD_INDEX;
}
uint32_t ifdId = 0; // TODO: all in IFD0 for now.
ssize_t index = mNamedIfds.indexOfKey(ifdId);
// Add a new IFD if necessary
if (index < 0) {
sp<TiffIfd> ifdEntry = new TiffIfd(ifdId);
if (mIfd == NULL) {
mIfd = ifdEntry;
}
index = mNamedIfds.add(ifdId, ifdEntry);
assert(index >= 0);
}
sp<TiffIfd> selectedIfd = mNamedIfds[index];
return selectedIfd->addEntry(entry);
}
status_t TiffWriter::uncheckedAddIfd(const sp<TiffIfd>& ifd) {
mNamedIfds.add(ifd->getId(), ifd);
sp<TiffIfd> last = findLastIfd();
if (last == NULL) {
mIfd = ifd;
} else {
last->setNextIfd(ifd);
}
last = ifd->getNextIfd();
while (last != NULL) {
mNamedIfds.add(last->getId(), last);
last = last->getNextIfd();
}
return OK;
}
status_t TiffWriter::addIfd(uint32_t ifd) {
ssize_t index = mNamedIfds.indexOfKey(ifd);
if (index >= 0) {
ALOGE("%s: Ifd with ID 0x%x already exists.", __FUNCTION__, ifd);
return BAD_VALUE;
}
sp<TiffIfd> newIfd = new TiffIfd(ifd);
if (mIfd == NULL) {
mIfd = newIfd;
} else {
sp<TiffIfd> last = findLastIfd();
last->setNextIfd(newIfd);
}
mNamedIfds.add(ifd, newIfd);
return OK;
}
TagType TiffWriter::getDefaultType(uint16_t tag) const {
const TagDefinition_t* definition = lookupDefinition(tag);
if (definition == NULL) {
ALOGE("%s: Could not find definition for tag %x", __FUNCTION__, tag);
return UNKNOWN_TAGTYPE;
}
return definition->defaultType;
}
uint32_t TiffWriter::getDefaultCount(uint16_t tag) const {
const TagDefinition_t* definition = lookupDefinition(tag);
if (definition == NULL) {
ALOGE("%s: Could not find definition for tag %x", __FUNCTION__, tag);
return 0;
}
return definition->fixedCount;
}
bool TiffWriter::checkIfDefined(uint16_t tag) const {
return lookupDefinition(tag) != NULL;
}
sp<TiffIfd> TiffWriter::findLastIfd() {
sp<TiffIfd> ifd = mIfd;
while(ifd != NULL) {
sp<TiffIfd> nextIfd = ifd->getNextIfd();
if (nextIfd == NULL) {
break;
}
ifd = nextIfd;
}
return ifd;
}
status_t TiffWriter::writeFileHeader(EndianOutput& out) {
status_t ret = OK;
uint16_t endMarker = (out.getEndianness() == BIG) ? BIG_ENDIAN_MARKER : LITTLE_ENDIAN_MARKER;
BAIL_ON_FAIL(out.write(&endMarker, 0, 1), ret);
uint16_t tiffMarker = TIFF_FILE_MARKER;
BAIL_ON_FAIL(out.write(&tiffMarker, 0, 1), ret);
uint32_t offsetMarker = FILE_HEADER_SIZE;
BAIL_ON_FAIL(out.write(&offsetMarker, 0, 1), ret);
return ret;
}
uint32_t TiffWriter::getTotalSize() const {
uint32_t totalSize = FILE_HEADER_SIZE;
sp<TiffIfd> ifd = mIfd;
while(ifd != NULL) {
totalSize += ifd->getSize();
ifd = ifd->getNextIfd();
}
return totalSize;
}
void TiffWriter::log() const {
ALOGI("%s: TiffWriter:", __FUNCTION__);
sp<TiffIfd> ifd = mIfd;
while(ifd != NULL) {
ifd->log();
ifd = ifd->getNextIfd();
}
}
} /*namespace img_utils*/
} /*namespace android*/
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