TiffIfd.cpp revision e507721000647a7d8afe44c63ef7fd04ef8971b1
1e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk/* 2e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * Copyright 2014 The Android Open Source Project 3e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * 4e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * Licensed under the Apache License, Version 2.0 (the "License"); 5e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * you may not use this file except in compliance with the License. 6e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * You may obtain a copy of the License at 7e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * 8e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * http://www.apache.org/licenses/LICENSE-2.0 9e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * 10e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * Unless required by applicable law or agreed to in writing, software 11e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * distributed under the License is distributed on an "AS IS" BASIS, 12e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * See the License for the specific language governing permissions and 14e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * limitations under the License. 15e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk */ 16e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 17e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk#include <img_utils/TiffIfd.h> 18e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk#include <img_utils/TiffHelpers.h> 19e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 20e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk#include <utils/Log.h> 21e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 22e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunknamespace android { 23e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunknamespace img_utils { 24e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 25e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben BrunkTiffIfd::TiffIfd(uint32_t ifdId) 26e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk : mNextIfd(), mIfdId(ifdId) {} 27e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 28e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben BrunkTiffIfd::~TiffIfd() {} 29e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 30e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkstatus_t TiffIfd::addEntry(const sp<TiffEntry>& entry) { 31e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t size = mEntries.size(); 32e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (size >= MAX_IFD_ENTRIES) { 33e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGW("%s: Failed to add entry for tag 0x%x to IFD %d, too many entries in IFD!", 34e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk __FUNCTION__, entry->getTag(), mIfdId); 35e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return BAD_INDEX; 36e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 37e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 38e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (mEntries.add(entry) < 0) { 39e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGW("%s: Failed to add entry for tag 0x%x to ifd %d.", __FUNCTION__, entry->getTag(), 40e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk mIfdId); 41e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return BAD_INDEX; 42e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 43e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return OK; 44e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 45e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 46e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunksp<TiffEntry> TiffIfd::getEntry(uint16_t tag) const { 47e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ssize_t index = mEntries.indexOfTag(tag); 48e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (index < 0) { 49e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGW("%s: No entry for tag 0x%x in ifd %d.", __FUNCTION__, tag, mIfdId); 50e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return NULL; 51e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 52e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return mEntries[index]; 53e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 54e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 55e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkvoid TiffIfd::setNextIfd(const sp<TiffIfd>& ifd) { 56e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk mNextIfd = ifd; 57e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 58e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 59e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunksp<TiffIfd> TiffIfd::getNextIfd() const { 60e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return mNextIfd; 61e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 62e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 63e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkuint32_t TiffIfd::checkAndGetOffset(uint32_t offset) const { 64e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t size = mEntries.size(); 65e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 66e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (size > MAX_IFD_ENTRIES) { 67e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGW("%s: Could not calculate IFD offsets, IFD %d contains too many entries.", 68e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk __FUNCTION__, mIfdId); 69e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return BAD_OFFSET; 70e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 71e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 72e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (size <= 0) { 73e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGW("%s: Could not calculate IFD offsets, IFD %d contains no entries.", __FUNCTION__, 74e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk mIfdId); 75e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return BAD_OFFSET; 76e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 77e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 78e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (offset == BAD_OFFSET) { 79e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGW("%s: Could not calculate IFD offsets, IFD %d had a bad initial offset.", 80e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk __FUNCTION__, mIfdId); 81e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return BAD_OFFSET; 82e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 83e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 84e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk uint32_t ifdSize = calculateIfdSize(size); 85e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk WORD_ALIGN(ifdSize); 86e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return offset + ifdSize; 87e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 88e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 89e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkstatus_t TiffIfd::writeData(uint32_t offset, /*out*/EndianOutput* out) const { 90e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk assert((offset % TIFF_WORD_SIZE) == 0); 91e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk status_t ret = OK; 92e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 93e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGV("%s: IFD %u written to offset %u", __FUNCTION__, mIfdId, offset ); 94e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk uint32_t valueOffset = checkAndGetOffset(offset); 95e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (valueOffset == 0) { 96e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return BAD_VALUE; 97e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 98e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 99e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t size = mEntries.size(); 100e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 101e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk // Writer IFD header (2 bytes, number of entries). 102e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk uint16_t header = static_cast<uint16_t>(size); 103e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk BAIL_ON_FAIL(out->write(&header, 0, 1), ret); 104e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 105e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk // Write tag entries 106e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk for (size_t i = 0; i < size; ++i) { 107e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk BAIL_ON_FAIL(mEntries[i]->writeTagInfo(valueOffset, out), ret); 108e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk valueOffset += mEntries[i]->getSize(); 109e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 110e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 111e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk // Writer IFD footer (4 bytes, offset to next IFD). 112e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk uint32_t footer = (mNextIfd != NULL) ? offset + getSize() : 0; 113e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk BAIL_ON_FAIL(out->write(&footer, 0, 1), ret); 114e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 115e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk assert(out->getCurrentOffset() == offset + calculateIfdSize(size)); 116e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 117e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk // Write zeroes till word aligned 118e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ZERO_TILL_WORD(out, calculateIfdSize(size), ret); 119e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 120e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk // Write values for each tag entry 121e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk for (size_t i = 0; i < size; ++i) { 122e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t last = out->getCurrentOffset(); 123e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk // Only write values that are too large to fit in the 12-byte TIFF entry 124e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (mEntries[i]->getSize() > OFFSET_SIZE) { 125e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk BAIL_ON_FAIL(mEntries[i]->writeData(out->getCurrentOffset(), out), ret); 126e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 127e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t next = out->getCurrentOffset(); 128e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t diff = (next - last); 129e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t actual = mEntries[i]->getSize(); 130e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk if (diff != actual) { 131e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGW("Sizes do not match for tag %x. Expected %d, received %d", 132e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk mEntries[i]->getTag(), actual, diff); 133e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 134e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 135e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 136e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk assert(out->getCurrentOffset() == offset + getSize()); 137e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 138e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return ret; 139e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 140e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 141e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkuint32_t TiffIfd::getSize() const { 142e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t size = mEntries.size(); 143e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk uint32_t total = calculateIfdSize(size); 144e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk WORD_ALIGN(total); 145e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk for (size_t i = 0; i < size; ++i) { 146e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk total += mEntries[i]->getSize(); 147e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 148e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return total; 149e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 150e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 151e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkuint32_t TiffIfd::getId() const { 152e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return mIfdId; 153e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 154e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 155e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkuint32_t TiffIfd::getComparableValue() const { 156e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return mIfdId; 157e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 158e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 159e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben BrunkString8 TiffIfd::toString() const { 160e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t s = mEntries.size(); 161e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk String8 output; 162e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk output.appendFormat("[ifd: %x, num_entries: %u, entries:\n", getId(), s); 163e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk for(size_t i = 0; i < mEntries.size(); ++i) { 164e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk output.append("\t"); 165e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk output.append(mEntries[i]->toString()); 166e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk output.append("\n"); 167e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 168e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk output.append(", next_ifd: %x]", ((mNextIfd != NULL) ? mNextIfd->getId() : 0)); 169e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk return output; 170e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 171e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 172e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkvoid TiffIfd::log() const { 173e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk size_t s = mEntries.size(); 174e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGI("[ifd: %x, num_entries: %u, entries:\n", getId(), s); 175e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk for(size_t i = 0; i < s; ++i) { 176e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGI("\t%s", mEntries[i]->toString().string()); 177e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk } 178e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk ALOGI(", next_ifd: %x]", ((mNextIfd != NULL) ? mNextIfd->getId() : 0)); 179e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} 180e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 181e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} /*namespace img_utils*/ 182e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} /*namespace android*/ 183