/*
  * 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 ff_exif_decode_ifd(AVCodecContext *avctx, GetByteContext *gbytes, int le,
                        int depth, AVDictionary **metadata);
 
 #endif /* AVCODEC_EXIF_H */