diff options
author | The Android Open Source Project <initial-contribution@android.com> | 2014-11-06 17:49:48 -0800 |
---|---|---|
committer | The Android Open Source Project <initial-contribution@android.com> | 2014-11-06 17:49:48 -0800 |
commit | e1a2df553a6d151807a5da738a3cd853bef908d9 (patch) | |
tree | 9015c1c9ad9ec69f1962657f70fe3df386fbb05a /media/img_utils/src/TiffIfd.cpp | |
parent | bcf093bfef277a8ec0119da9e84e5abac58ad0b1 (diff) | |
parent | 841daebc75fbf5e7fb4dd71cab559b8f4d7150ae (diff) | |
download | frameworks_av-e1a2df553a6d151807a5da738a3cd853bef908d9.zip frameworks_av-e1a2df553a6d151807a5da738a3cd853bef908d9.tar.gz frameworks_av-e1a2df553a6d151807a5da738a3cd853bef908d9.tar.bz2 |
Resolve conflict
Diffstat (limited to 'media/img_utils/src/TiffIfd.cpp')
-rw-r--r-- | media/img_utils/src/TiffIfd.cpp | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/media/img_utils/src/TiffIfd.cpp b/media/img_utils/src/TiffIfd.cpp new file mode 100644 index 0000000..3fb00cc --- /dev/null +++ b/media/img_utils/src/TiffIfd.cpp @@ -0,0 +1,386 @@ +/* + * 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. + */ + +#define LOG_TAG "TiffIfd" + +#include <img_utils/TagDefinitions.h> +#include <img_utils/TiffHelpers.h> +#include <img_utils/TiffIfd.h> +#include <img_utils/TiffWriter.h> + +#include <utils/Log.h> + +namespace android { +namespace img_utils { + +TiffIfd::TiffIfd(uint32_t ifdId) + : mNextIfd(), mIfdId(ifdId), mStripOffsetsInitialized(false) {} + +TiffIfd::~TiffIfd() {} + +status_t TiffIfd::addEntry(const sp<TiffEntry>& entry) { + size_t size = mEntries.size(); + if (size >= MAX_IFD_ENTRIES) { + ALOGW("%s: Failed to add entry for tag 0x%x to IFD %u, too many entries in IFD!", + __FUNCTION__, entry->getTag(), mIfdId); + return BAD_INDEX; + } + + if (mEntries.add(entry) < 0) { + ALOGW("%s: Failed to add entry for tag 0x%x to ifd %u.", __FUNCTION__, entry->getTag(), + mIfdId); + return BAD_INDEX; + } + return OK; +} + +sp<TiffEntry> TiffIfd::getEntry(uint16_t tag) const { + ssize_t index = mEntries.indexOfTag(tag); + if (index < 0) { + ALOGW("%s: No entry for tag 0x%x in ifd %u.", __FUNCTION__, tag, mIfdId); + return NULL; + } + return mEntries[index]; +} + +void TiffIfd::removeEntry(uint16_t tag) { + ssize_t index = mEntries.indexOfTag(tag); + if (index >= 0) { + mEntries.removeAt(index); + } +} + + +void TiffIfd::setNextIfd(const sp<TiffIfd>& ifd) { + mNextIfd = ifd; +} + +sp<TiffIfd> TiffIfd::getNextIfd() const { + return mNextIfd; +} + +uint32_t TiffIfd::checkAndGetOffset(uint32_t offset) const { + size_t size = mEntries.size(); + + if (size > MAX_IFD_ENTRIES) { + ALOGW("%s: Could not calculate IFD offsets, IFD %u contains too many entries.", + __FUNCTION__, mIfdId); + return BAD_OFFSET; + } + + if (size <= 0) { + ALOGW("%s: Could not calculate IFD offsets, IFD %u contains no entries.", __FUNCTION__, + mIfdId); + return BAD_OFFSET; + } + + if (offset == BAD_OFFSET) { + ALOGW("%s: Could not calculate IFD offsets, IFD %u had a bad initial offset.", + __FUNCTION__, mIfdId); + return BAD_OFFSET; + } + + uint32_t ifdSize = calculateIfdSize(size); + WORD_ALIGN(ifdSize); + return offset + ifdSize; +} + +status_t TiffIfd::writeData(uint32_t offset, /*out*/EndianOutput* out) const { + assert((offset % TIFF_WORD_SIZE) == 0); + status_t ret = OK; + + ALOGV("%s: IFD %u written to offset %u", __FUNCTION__, mIfdId, offset ); + uint32_t valueOffset = checkAndGetOffset(offset); + if (valueOffset == 0) { + return BAD_VALUE; + } + + size_t size = mEntries.size(); + + // Writer IFD header (2 bytes, number of entries). + uint16_t header = static_cast<uint16_t>(size); + BAIL_ON_FAIL(out->write(&header, 0, 1), ret); + + // Write tag entries + for (size_t i = 0; i < size; ++i) { + BAIL_ON_FAIL(mEntries[i]->writeTagInfo(valueOffset, out), ret); + valueOffset += mEntries[i]->getSize(); + } + + // Writer IFD footer (4 bytes, offset to next IFD). + uint32_t footer = (mNextIfd != NULL) ? offset + getSize() : 0; + BAIL_ON_FAIL(out->write(&footer, 0, 1), ret); + + assert(out->getCurrentOffset() == offset + calculateIfdSize(size)); + + // Write zeroes till word aligned + ZERO_TILL_WORD(out, calculateIfdSize(size), ret); + + // Write values for each tag entry + for (size_t i = 0; i < size; ++i) { + size_t last = out->getCurrentOffset(); + // Only write values that are too large to fit in the 12-byte TIFF entry + if (mEntries[i]->getSize() > OFFSET_SIZE) { + BAIL_ON_FAIL(mEntries[i]->writeData(out->getCurrentOffset(), out), ret); + } + size_t next = out->getCurrentOffset(); + size_t diff = (next - last); + size_t actual = mEntries[i]->getSize(); + if (diff != actual) { + ALOGW("Sizes do not match for tag %x. Expected %zu, received %zu", + mEntries[i]->getTag(), actual, diff); + } + } + + assert(out->getCurrentOffset() == offset + getSize()); + + return ret; +} + +size_t TiffIfd::getSize() const { + size_t size = mEntries.size(); + uint32_t total = calculateIfdSize(size); + WORD_ALIGN(total); + for (size_t i = 0; i < size; ++i) { + total += mEntries[i]->getSize(); + } + return total; +} + +uint32_t TiffIfd::getId() const { + return mIfdId; +} + +uint32_t TiffIfd::getComparableValue() const { + return mIfdId; +} + +status_t TiffIfd::validateAndSetStripTags() { + sp<TiffEntry> widthEntry = getEntry(TAG_IMAGEWIDTH); + if (widthEntry == NULL) { + ALOGE("%s: IFD %u doesn't have a ImageWidth tag set", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + sp<TiffEntry> heightEntry = getEntry(TAG_IMAGELENGTH); + if (heightEntry == NULL) { + ALOGE("%s: IFD %u doesn't have a ImageLength tag set", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + sp<TiffEntry> samplesEntry = getEntry(TAG_SAMPLESPERPIXEL); + if (samplesEntry == NULL) { + ALOGE("%s: IFD %u doesn't have a SamplesPerPixel tag set", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + sp<TiffEntry> bitsEntry = getEntry(TAG_BITSPERSAMPLE); + if (bitsEntry == NULL) { + ALOGE("%s: IFD %u doesn't have a BitsPerSample tag set", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + uint32_t width = *(widthEntry->getData<uint32_t>()); + uint32_t height = *(heightEntry->getData<uint32_t>()); + uint16_t bitsPerSample = *(bitsEntry->getData<uint16_t>()); + uint16_t samplesPerPixel = *(samplesEntry->getData<uint16_t>()); + + if ((bitsPerSample % 8) != 0) { + ALOGE("%s: BitsPerSample %d in IFD %u is not byte-aligned.", __FUNCTION__, + bitsPerSample, mIfdId); + return BAD_VALUE; + } + + uint32_t bytesPerSample = bitsPerSample / 8; + + // Choose strip size as close to 8kb as possible without splitting rows. + // If the row length is >8kb, each strip will only contain a single row. + const uint32_t rowLengthBytes = bytesPerSample * samplesPerPixel * width; + const uint32_t idealChunkSize = (1 << 13); // 8kb + uint32_t rowsPerChunk = idealChunkSize / rowLengthBytes; + rowsPerChunk = (rowsPerChunk == 0) ? 1 : rowsPerChunk; + const uint32_t actualChunkSize = rowLengthBytes * rowsPerChunk; + + const uint32_t lastChunkRows = height % rowsPerChunk; + const uint32_t lastChunkSize = lastChunkRows * rowLengthBytes; + + if (actualChunkSize > /*max strip size for TIFF/EP*/65536) { + ALOGE("%s: Strip length too long.", __FUNCTION__); + return BAD_VALUE; + } + + size_t numStrips = height / rowsPerChunk; + + // Add another strip for the incomplete chunk. + if (lastChunkRows > 0) { + numStrips += 1; + } + + // Put each row in it's own strip + uint32_t rowsPerStripVal = rowsPerChunk; + sp<TiffEntry> rowsPerStrip = TiffWriter::uncheckedBuildEntry(TAG_ROWSPERSTRIP, LONG, 1, + UNDEFINED_ENDIAN, &rowsPerStripVal); + + if (rowsPerStrip == NULL) { + ALOGE("%s: Could not build entry for RowsPerStrip tag.", __FUNCTION__); + return BAD_VALUE; + } + + Vector<uint32_t> byteCounts; + + for (size_t i = 0; i < numStrips; ++i) { + if (lastChunkRows > 0 && i == (numStrips - 1)) { + byteCounts.add(lastChunkSize); + } else { + byteCounts.add(actualChunkSize); + } + } + + // Set byte counts for each strip + sp<TiffEntry> stripByteCounts = TiffWriter::uncheckedBuildEntry(TAG_STRIPBYTECOUNTS, LONG, + static_cast<uint32_t>(numStrips), UNDEFINED_ENDIAN, byteCounts.array()); + + if (stripByteCounts == NULL) { + ALOGE("%s: Could not build entry for StripByteCounts tag.", __FUNCTION__); + return BAD_VALUE; + } + + Vector<uint32_t> stripOffsetsVector; + stripOffsetsVector.resize(numStrips); + + // Set uninitialized offsets + sp<TiffEntry> stripOffsets = TiffWriter::uncheckedBuildEntry(TAG_STRIPOFFSETS, LONG, + static_cast<uint32_t>(numStrips), UNDEFINED_ENDIAN, stripOffsetsVector.array()); + + if (stripOffsets == NULL) { + ALOGE("%s: Could not build entry for StripOffsets tag.", __FUNCTION__); + return BAD_VALUE; + } + + if(addEntry(stripByteCounts) != OK) { + ALOGE("%s: Could not add entry for StripByteCounts to IFD %u", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + if(addEntry(rowsPerStrip) != OK) { + ALOGE("%s: Could not add entry for StripByteCounts to IFD %u", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + if(addEntry(stripOffsets) != OK) { + ALOGE("%s: Could not add entry for StripByteCounts to IFD %u", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + mStripOffsetsInitialized = true; + return OK; +} + +bool TiffIfd::uninitializedOffsets() const { + return mStripOffsetsInitialized; +} + +status_t TiffIfd::setStripOffset(uint32_t offset) { + + // Get old offsets and bytecounts + sp<TiffEntry> oldOffsets = getEntry(TAG_STRIPOFFSETS); + if (oldOffsets == NULL) { + ALOGE("%s: IFD %u does not contain StripOffsets entry.", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + sp<TiffEntry> stripByteCounts = getEntry(TAG_STRIPBYTECOUNTS); + if (stripByteCounts == NULL) { + ALOGE("%s: IFD %u does not contain StripByteCounts entry.", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + uint32_t offsetsCount = oldOffsets->getCount(); + uint32_t byteCount = stripByteCounts->getCount(); + if (offsetsCount != byteCount) { + ALOGE("%s: StripOffsets count (%u) doesn't match StripByteCounts count (%u) in IFD %u", + __FUNCTION__, offsetsCount, byteCount, mIfdId); + return BAD_VALUE; + } + + const uint32_t* stripByteCountsArray = stripByteCounts->getData<uint32_t>(); + + size_t numStrips = offsetsCount; + + Vector<uint32_t> stripOffsets; + + // Calculate updated byte offsets + for (size_t i = 0; i < numStrips; ++i) { + stripOffsets.add(offset); + offset += stripByteCountsArray[i]; + } + + sp<TiffEntry> newOffsets = TiffWriter::uncheckedBuildEntry(TAG_STRIPOFFSETS, LONG, + static_cast<uint32_t>(numStrips), UNDEFINED_ENDIAN, stripOffsets.array()); + + if (newOffsets == NULL) { + ALOGE("%s: Coult not build updated offsets entry in IFD %u", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + if (addEntry(newOffsets) != OK) { + ALOGE("%s: Failed to add updated offsets entry in IFD %u", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + return OK; +} + +uint32_t TiffIfd::getStripSize() const { + sp<TiffEntry> stripByteCounts = getEntry(TAG_STRIPBYTECOUNTS); + if (stripByteCounts == NULL) { + ALOGE("%s: IFD %u does not contain StripByteCounts entry.", __FUNCTION__, mIfdId); + return BAD_VALUE; + } + + uint32_t count = stripByteCounts->getCount(); + const uint32_t* byteCounts = stripByteCounts->getData<uint32_t>(); + + uint32_t total = 0; + for (size_t i = 0; i < static_cast<size_t>(count); ++i) { + total += byteCounts[i]; + } + return total; +} + +String8 TiffIfd::toString() const { + size_t s = mEntries.size(); + String8 output; + output.appendFormat("[ifd: %x, num_entries: %zu, entries:\n", getId(), s); + for(size_t i = 0; i < mEntries.size(); ++i) { + output.append("\t"); + output.append(mEntries[i]->toString()); + output.append("\n"); + } + output.append(", next_ifd: %x]", ((mNextIfd != NULL) ? mNextIfd->getId() : 0)); + return output; +} + +void TiffIfd::log() const { + size_t s = mEntries.size(); + ALOGI("[ifd: %x, num_entries: %zu, entries:\n", getId(), s); + for(size_t i = 0; i < s; ++i) { + ALOGI("\t%s", mEntries[i]->toString().string()); + } + ALOGI(", next_ifd: %x]", ((mNextIfd != NULL) ? mNextIfd->getId() : 0)); +} + +} /*namespace img_utils*/ +} /*namespace android*/ |