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Diffstat (limited to 'src/tiff_parser.h')
| -rw-r--r-- | src/tiff_parser.h | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/src/tiff_parser.h b/src/tiff_parser.h deleted file mode 100644 index e19dea2..0000000 --- a/src/tiff_parser.h +++ /dev/null @@ -1,211 +0,0 @@ -// Copyright 2015 Google Inc. -// -// 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. -// -//////////////////////////////////////////////////////////////////////////////// - -#ifndef PIEX_TIFF_PARSER_H_ -#define PIEX_TIFF_PARSER_H_ - -#include <cstdint> -#include <memory> -#include <set> -#include <vector> - -#include "src/piex_types.h" -#include "src/tiff_directory/tiff_directory.h" - -namespace piex { - -// Specifies the maximum number of pixels for thumbnails in each direction. -const int kThumbnailMaxDimension = 512; - -// Specifies all tags that might be of interest to get the preview data. -enum GpsTags { - kGpsTagLatitudeRef = 1, - kGpsTagLatitude = 2, - kGpsTagLongitudeRef = 3, - kGpsTagLongitude = 4, - kGpsTagAltitudeRef = 5, - kGpsTagAltitude = 6, - kGpsTagTimeStamp = 7, - kGpsTagDateStamp = 29, -}; - -enum TiffTags { - kExifTagColorSpace = 0xA001, - kExifTagDateTimeOriginal = 0x9003, - kExifTagDefaultCropSize = 0xC620, - kExifTagExposureTime = 0x829a, - kExifTagFnumber = 0x829d, - kExifTagFocalLength = 0x920A, - kExifTagGps = 0x8825, - kExifTagHeight = 0xA003, - kExifTagIsoSpeed = 0x8827, - kExifTagMakernotes = 0x927C, - kExifTagWidth = 0xA002, - kOlymTagAspectFrame = 0x1113, - kOlymTagCameraSettings = 0x2020, - kOlymTagRawProcessing = 0x2040, - kPanaTagBottomBorder = 0x006, - kPanaTagIso = 0x0017, - kPanaTagJpegImage = 0x002E, - kPanaTagLeftBorder = 0x0005, - kPanaTagRightBorder = 0x007, - kPanaTagTopBorder = 0x0004, - kPentaxTagColorSpace = 0x0037, - kTiffTagArtist = 0x013B, - kTiffTagBitsPerSample = 0x0102, - kTiffTagCfaPatternDim = 0x828D, - kTiffTagCompression = 0x0103, - kTiffTagDateTime = 0x0132, - kTiffTagExifIfd = 0x8769, - kTiffTagImageDescription = 0x010E, - kTiffTagImageLength = 0x0101, - kTiffTagImageWidth = 0x0100, - kTiffTagJpegByteCount = 0x0202, - kTiffTagJpegOffset = 0x0201, - kTiffTagMake = 0x010F, - kTiffTagModel = 0x0110, - kTiffTagOrientation = 0x0112, - kTiffTagPhotometric = 0x0106, - kTiffTagPlanarConfig = 0x011C, - kTiffTagResolutionUnit = 0x0128, - kTiffTagRowsPerStrip = 0x0116, - kTiffTagSamplesPerPixel = 0x0115, - kTiffTagSoftware = 0x0131, - kTiffTagStripByteCounts = 0x0117, - kTiffTagStripOffsets = 0x0111, - kTiffTagSubFileType = 0x00FE, - kTiffTagSubIfd = 0x014A, - kTiffTagTileByteCounts = 0x0145, - kTiffTagTileLength = 0x0143, - kTiffTagTileOffsets = 0x0144, - kTiffTagTileWidth = 0x0142, - kTiffTagXresolution = 0x011A, - kTiffTagYresolution = 0x011B, -}; - -typedef std::set<tiff_directory::TiffDirectory::Tag> TagSet; -typedef std::vector<tiff_directory::TiffDirectory> IfdVector; - -struct TiffContent { - IfdVector tiff_directory; - std::unique_ptr<tiff_directory::TiffDirectory> exif_directory; - std::unique_ptr<tiff_directory::TiffDirectory> gps_directory; -}; - -// Reads 2 bytes, an unsigned 16bit from 'stream' at a certain 'offset'. The -// bytes get swapped according to the desired endianness returning true on -// success. Returns false when something is wrong. -bool Get16u(StreamInterface* stream, const std::uint32_t offset, - const tiff_directory::Endian& endian, std::uint16_t* value); - -// Reads 4 bytes, an unsigned 32bit 'value' from 'stream' at a certain 'offset'. -// The bytes get swapped according to the desired endianness returning true on -// success. Returns false when something is wrong. -bool Get32u(StreamInterface* stream, const std::uint32_t offset, - const tiff_directory::Endian& endian, std::uint32_t* value); - -// Retrieves a byte vector of size 'length' from 'stream' beginning at some -// 'offset' reading the data in chunks of one MiB. -// If 'error' is not set to kOk the returned value is invalid. -std::vector<std::uint8_t> GetData(const size_t offset, const size_t length, - StreamInterface* stream, Error* error); - -// Retrieves the endianness of TIFF compliant data at 'tiff_offset' from -// 'stream' returning true on success. Returns false when something is wrong. -bool GetEndianness(const std::uint32_t tiff_offset, StreamInterface* stream, - tiff_directory::Endian* endian); - -// Retrieves an image from tiff_directory. Return false when something is wrong. -bool GetImageData(const tiff_directory::TiffDirectory& tiff_directory, - StreamInterface* stream, Image* image); - -// Retrieves the width and height from the jpeg image returning true on -// success. Returns false when something is wrong. -bool GetJpegDimensions(const std::uint32_t jpeg_offset, StreamInterface* stream, - std::uint16_t* width, std::uint16_t* height); - -// According to Tiff/EP a thumbnail has max 256 pixels per dimension. -// http://standardsproposals.bsigroup.com/Home/getPDF/567 -bool IsThumbnail(const Image& image, - const int max_dimension = kThumbnailMaxDimension); - -// Parses through a Tiff IFD and writes all 'desired_tags' to a -// 'tiff_directory'. -// Returns false if something with the Tiff data is wrong. -bool ParseDirectory(const std::uint32_t tiff_offset, - const std::uint32_t ifd_offset, - const tiff_directory::Endian endian, - const TagSet& desired_tags, StreamInterface* stream, - tiff_directory::TiffDirectory* tiff_directory, - std::uint32_t* next_ifd_offset); - -// Returns true if Exif orientation for the image can be obtained. False -// otherwise. -bool GetExifOrientation(StreamInterface* stream, const std::uint32_t offset, - std::uint32_t* orientation); - -// Reads the width and height of the full resolution image. The tag groups are -// exclusive. -bool GetFullDimension32(const tiff_directory::TiffDirectory& tiff_directory, - std::uint32_t* width, std::uint32_t* height); - -// Reads the width and height of the crop information if available. -// Returns false if an error occurred. -bool GetFullCropDimension(const tiff_directory::TiffDirectory& tiff_directory, - std::uint32_t* width, std::uint32_t* height); - -// Reads 1 or more rational values for a tag and stores results into data. -// Returns false if an error occurred. -bool GetRational(const tiff_directory::TiffDirectory::Tag& tag, - const tiff_directory::TiffDirectory& directory, - const int data_size, PreviewImageData::Rational* data); - -// Enables us to parse through data that complies to the Tiff/EP specification. -class TiffParser { - public: - // The caller owns 'stream' and is responsible to keep it alive while the - // TiffParser object is used. - explicit TiffParser(StreamInterface* stream); - TiffParser(StreamInterface* stream, const std::uint32_t offset); - - // Runs over the Tiff IFD, Exif IFD and subIFDs to get the preview image data. - // Returns false if something with the Tiff tags is wrong. - bool GetPreviewImageData(const TiffContent& tiff_content, - PreviewImageData* preview_image_data); - - // Returns false if called more that once or something with the Tiff data is - // wrong. - bool Parse(const TagSet& desired_tags, const std::uint16_t max_number_ifds, - TiffContent* tiff_content); - - private: - // Disallow copy and assignment. - TiffParser(const TiffParser&) = delete; - TiffParser& operator=(const TiffParser&) = delete; - - bool ParseIfd(const std::uint32_t ifd_offset, const TagSet& desired_tags, - const std::uint16_t max_number_ifds, IfdVector* tiff_directory); - bool ParseGpsData(const tiff_directory::TiffDirectory* tiff_ifd, - TiffContent* tiff_content); - - StreamInterface* stream_ = nullptr; - std::uint32_t tiff_offset_ = 0; - tiff_directory::Endian endian_; -}; - -} // namespace piex - -#endif // PIEX_TIFF_PARSER_H_ |