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/*
* EXIF metadata parser
* Copyright (c) 2013 Thilo Borgmann <thilo.borgmann _at_ mail.de>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* EXIF metadata parser
* @author Thilo Borgmann <thilo.borgmann _at_ mail.de>
*/
#ifndef AVCODEC_EXIF_H
#define AVCODEC_EXIF_H
#include "avcodec.h"
#include "bytestream.h"
#include "tiff.h"
#define EXIF_MAX_IFD_RECURSION 2
#define EXIF_TAG_NAME_LENGTH 32
struct exif_tag {
char name[EXIF_TAG_NAME_LENGTH];
uint16_t id;
};
static const struct exif_tag tag_list[] = { // JEITA CP-3451 EXIF specification:
{"GPSVersionID", 0x00}, // <- Table 12 GPS Attribute Information
{"GPSLatitudeRef", 0x01},
{"GPSLatitude", 0x02},
{"GPSLongitudeRef", 0x03},
{"GPSLongitude", 0x04},
{"GPSAltitudeRef", 0x05},
{"GPSAltitude", 0x06},
{"GPSTimeStamp", 0x07},
{"GPSSatellites", 0x08},
{"GPSStatus", 0x09},
{"GPSMeasureMode", 0x0A},
{"GPSDOP", 0x0B},
{"GPSSpeedRef", 0x0C},
{"GPSSpeed", 0x0D},
{"GPSTrackRef", 0x0E},
{"GPSTrack", 0x0F},
{"GPSImgDirectionRef", 0x10},
{"GPSImgDirection", 0x11},
{"GPSMapDatum", 0x12},
{"GPSDestLatitudeRef", 0x13},
{"GPSDestLatitude", 0x14},
{"GPSDestLongitudeRef", 0x15},
{"GPSDestLongitude", 0x16},
{"GPSDestBearingRef", 0x17},
{"GPSDestBearing", 0x18},
{"GPSDestDistanceRef", 0x19},
{"GPSDestDistance", 0x1A},
{"GPSProcessingMethod", 0x1B},
{"GPSAreaInformation", 0x1C},
{"GPSDateStamp", 0x1D},
{"GPSDifferential", 0x1E},
{"ImageWidth", 0x100}, // <- Table 3 TIFF Rev. 6.0 Attribute Information Used in Exif
{"ImageLength", 0x101},
{"BitsPerSample", 0x102},
{"Compression", 0x103},
{"PhotometricInterpretation", 0x106},
{"Orientation", 0x112},
{"SamplesPerPixel", 0x115},
{"PlanarConfiguration", 0x11C},
{"YCbCrSubSampling", 0x212},
{"YCbCrPositioning", 0x213},
{"XResolution", 0x11A},
{"YResolution", 0x11B},
{"ResolutionUnit", 0x128},
{"StripOffsets", 0x111},
{"RowsPerStrip", 0x116},
{"StripByteCounts", 0x117},
{"JPEGInterchangeFormat", 0x201},
{"JPEGInterchangeFormatLength",0x202},
{"TransferFunction", 0x12D},
{"WhitePoint", 0x13E},
{"PrimaryChromaticities", 0x13F},
{"YCbCrCoefficients", 0x211},
{"ReferenceBlackWhite", 0x214},
{"DateTime", 0x132},
{"ImageDescription", 0x10E},
{"Make", 0x10F},
{"Model", 0x110},
{"Software", 0x131},
{"Artist", 0x13B},
{"Copyright", 0x8298},
{"ExifVersion", 0x9000}, // <- Table 4 Exif IFD Attribute Information (1)
{"FlashpixVersion", 0xA000},
{"ColorSpace", 0xA001},
{"ComponentsConfiguration", 0x9101},
{"CompressedBitsPerPixel", 0x9102},
{"PixelXDimension", 0xA002},
{"PixelYDimension", 0xA003},
{"MakerNote", 0x927C},
{"UserComment", 0x9286},
{"RelatedSoundFile", 0xA004},
{"DateTimeOriginal", 0x9003},
{"DateTimeDigitized", 0x9004},
{"SubSecTime", 0x9290},
{"SubSecTimeOriginal", 0x9291},
{"SubSecTimeDigitized", 0x9292},
{"ImageUniqueID", 0xA420},
{"ExposureTime", 0x829A}, // <- Table 5 Exif IFD Attribute Information (2)
{"FNumber", 0x829D},
{"ExposureProgram", 0x8822},
{"SpectralSensitivity", 0x8824},
{"ISOSpeedRatings", 0x8827},
{"OECF", 0x8828},
{"ShutterSpeedValue", 0x9201},
{"ApertureValue", 0x9202},
{"BrightnessValue", 0x9203},
{"ExposureBiasValue", 0x9204},
{"MaxApertureValue", 0x9205},
{"SubjectDistance", 0x9206},
{"MeteringMode", 0x9207},
{"LightSource", 0x9208},
{"Flash", 0x9209},
{"FocalLength", 0x920A},
{"SubjectArea", 0x9214},
{"FlashEnergy", 0xA20B},
{"SpatialFrequencyResponse", 0xA20C},
{"FocalPlaneXResolution", 0xA20E},
{"FocalPlaneYResolution", 0xA20F},
{"FocalPlaneResolutionUnit", 0xA210},
{"SubjectLocation", 0xA214},
{"ExposureIndex", 0xA215},
{"SensingMethod", 0xA217},
{"FileSource", 0xA300},
{"SceneType", 0xA301},
{"CFAPattern", 0xA302},
{"CustomRendered", 0xA401},
{"ExposureMode", 0xA402},
{"WhiteBalance", 0xA403},
{"DigitalZoomRatio", 0xA404},
{"FocalLengthIn35mmFilm", 0xA405},
{"SceneCaptureType", 0xA406},
{"GainControl", 0xA407},
{"Contrast", 0xA408},
{"Saturation", 0xA409},
{"Sharpness", 0xA40A},
{"DeviceSettingDescription", 0xA40B},
{"SubjectDistanceRange", 0xA40C}
// {"InteroperabilityIndex", 0x1}, // <- Table 13 Interoperability IFD Attribute Information
// {"", 0x0}
};
/** Recursively decodes all IFD's and
* adds included TAGS into the metadata dictionary. */
int avpriv_exif_decode_ifd(AVCodecContext *avctx, GetByteContext *gbytes, int le,
int depth, AVDictionary **metadata);
#endif /* AVCODEC_EXIF_H */
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