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1 | /* |
2 | * EXIF metadata parser | |
3 | * Copyright (c) 2013 Thilo Borgmann <thilo.borgmann _at_ mail.de> | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * EXIF metadata parser | |
25 | * @author Thilo Borgmann <thilo.borgmann _at_ mail.de> | |
26 | */ | |
27 | ||
28 | #ifndef AVCODEC_EXIF_H | |
29 | #define AVCODEC_EXIF_H | |
30 | ||
31 | #include "avcodec.h" | |
32 | #include "bytestream.h" | |
33 | #include "tiff.h" | |
34 | ||
35 | #define EXIF_MAX_IFD_RECURSION 2 | |
36 | #define EXIF_TAG_NAME_LENGTH 32 | |
37 | ||
38 | struct exif_tag { | |
39 | char name[EXIF_TAG_NAME_LENGTH]; | |
40 | uint16_t id; | |
41 | }; | |
42 | ||
43 | static const struct exif_tag tag_list[] = { // JEITA CP-3451 EXIF specification: | |
44 | {"GPSVersionID", 0x00}, // <- Table 12 GPS Attribute Information | |
45 | {"GPSLatitudeRef", 0x01}, | |
46 | {"GPSLatitude", 0x02}, | |
47 | {"GPSLongitudeRef", 0x03}, | |
48 | {"GPSLongitude", 0x04}, | |
49 | {"GPSAltitudeRef", 0x05}, | |
50 | {"GPSAltitude", 0x06}, | |
51 | {"GPSTimeStamp", 0x07}, | |
52 | {"GPSSatellites", 0x08}, | |
53 | {"GPSStatus", 0x09}, | |
54 | {"GPSMeasureMode", 0x0A}, | |
55 | {"GPSDOP", 0x0B}, | |
56 | {"GPSSpeedRef", 0x0C}, | |
57 | {"GPSSpeed", 0x0D}, | |
58 | {"GPSTrackRef", 0x0E}, | |
59 | {"GPSTrack", 0x0F}, | |
60 | {"GPSImgDirectionRef", 0x10}, | |
61 | {"GPSImgDirection", 0x11}, | |
62 | {"GPSMapDatum", 0x12}, | |
63 | {"GPSDestLatitudeRef", 0x13}, | |
64 | {"GPSDestLatitude", 0x14}, | |
65 | {"GPSDestLongitudeRef", 0x15}, | |
66 | {"GPSDestLongitude", 0x16}, | |
67 | {"GPSDestBearingRef", 0x17}, | |
68 | {"GPSDestBearing", 0x18}, | |
69 | {"GPSDestDistanceRef", 0x19}, | |
70 | {"GPSDestDistance", 0x1A}, | |
71 | {"GPSProcessingMethod", 0x1B}, | |
72 | {"GPSAreaInformation", 0x1C}, | |
73 | {"GPSDateStamp", 0x1D}, | |
74 | {"GPSDifferential", 0x1E}, | |
75 | {"ImageWidth", 0x100}, // <- Table 3 TIFF Rev. 6.0 Attribute Information Used in Exif | |
76 | {"ImageLength", 0x101}, | |
77 | {"BitsPerSample", 0x102}, | |
78 | {"Compression", 0x103}, | |
79 | {"PhotometricInterpretation", 0x106}, | |
80 | {"Orientation", 0x112}, | |
81 | {"SamplesPerPixel", 0x115}, | |
82 | {"PlanarConfiguration", 0x11C}, | |
83 | {"YCbCrSubSampling", 0x212}, | |
84 | {"YCbCrPositioning", 0x213}, | |
85 | {"XResolution", 0x11A}, | |
86 | {"YResolution", 0x11B}, | |
87 | {"ResolutionUnit", 0x128}, | |
88 | {"StripOffsets", 0x111}, | |
89 | {"RowsPerStrip", 0x116}, | |
90 | {"StripByteCounts", 0x117}, | |
91 | {"JPEGInterchangeFormat", 0x201}, | |
92 | {"JPEGInterchangeFormatLength",0x202}, | |
93 | {"TransferFunction", 0x12D}, | |
94 | {"WhitePoint", 0x13E}, | |
95 | {"PrimaryChromaticities", 0x13F}, | |
96 | {"YCbCrCoefficients", 0x211}, | |
97 | {"ReferenceBlackWhite", 0x214}, | |
98 | {"DateTime", 0x132}, | |
99 | {"ImageDescription", 0x10E}, | |
100 | {"Make", 0x10F}, | |
101 | {"Model", 0x110}, | |
102 | {"Software", 0x131}, | |
103 | {"Artist", 0x13B}, | |
104 | {"Copyright", 0x8298}, | |
105 | {"ExifVersion", 0x9000}, // <- Table 4 Exif IFD Attribute Information (1) | |
106 | {"FlashpixVersion", 0xA000}, | |
107 | {"ColorSpace", 0xA001}, | |
108 | {"ComponentsConfiguration", 0x9101}, | |
109 | {"CompressedBitsPerPixel", 0x9102}, | |
110 | {"PixelXDimension", 0xA002}, | |
111 | {"PixelYDimension", 0xA003}, | |
112 | {"MakerNote", 0x927C}, | |
113 | {"UserComment", 0x9286}, | |
114 | {"RelatedSoundFile", 0xA004}, | |
115 | {"DateTimeOriginal", 0x9003}, | |
116 | {"DateTimeDigitized", 0x9004}, | |
117 | {"SubSecTime", 0x9290}, | |
118 | {"SubSecTimeOriginal", 0x9291}, | |
119 | {"SubSecTimeDigitized", 0x9292}, | |
120 | {"ImageUniqueID", 0xA420}, | |
121 | {"ExposureTime", 0x829A}, // <- Table 5 Exif IFD Attribute Information (2) | |
122 | {"FNumber", 0x829D}, | |
123 | {"ExposureProgram", 0x8822}, | |
124 | {"SpectralSensitivity", 0x8824}, | |
125 | {"ISOSpeedRatings", 0x8827}, | |
126 | {"OECF", 0x8828}, | |
127 | {"ShutterSpeedValue", 0x9201}, | |
128 | {"ApertureValue", 0x9202}, | |
129 | {"BrightnessValue", 0x9203}, | |
130 | {"ExposureBiasValue", 0x9204}, | |
131 | {"MaxApertureValue", 0x9205}, | |
132 | {"SubjectDistance", 0x9206}, | |
133 | {"MeteringMode", 0x9207}, | |
134 | {"LightSource", 0x9208}, | |
135 | {"Flash", 0x9209}, | |
136 | {"FocalLength", 0x920A}, | |
137 | {"SubjectArea", 0x9214}, | |
138 | {"FlashEnergy", 0xA20B}, | |
139 | {"SpatialFrequencyResponse", 0xA20C}, | |
140 | {"FocalPlaneXResolution", 0xA20E}, | |
141 | {"FocalPlaneYResolution", 0xA20F}, | |
142 | {"FocalPlaneResolutionUnit", 0xA210}, | |
143 | {"SubjectLocation", 0xA214}, | |
144 | {"ExposureIndex", 0xA215}, | |
145 | {"SensingMethod", 0xA217}, | |
146 | {"FileSource", 0xA300}, | |
147 | {"SceneType", 0xA301}, | |
148 | {"CFAPattern", 0xA302}, | |
149 | {"CustomRendered", 0xA401}, | |
150 | {"ExposureMode", 0xA402}, | |
151 | {"WhiteBalance", 0xA403}, | |
152 | {"DigitalZoomRatio", 0xA404}, | |
153 | {"FocalLengthIn35mmFilm", 0xA405}, | |
154 | {"SceneCaptureType", 0xA406}, | |
155 | {"GainControl", 0xA407}, | |
156 | {"Contrast", 0xA408}, | |
157 | {"Saturation", 0xA409}, | |
158 | {"Sharpness", 0xA40A}, | |
159 | {"DeviceSettingDescription", 0xA40B}, | |
160 | {"SubjectDistanceRange", 0xA40C} | |
161 | // {"InteroperabilityIndex", 0x1}, // <- Table 13 Interoperability IFD Attribute Information | |
162 | // {"", 0x0} | |
163 | }; | |
164 | ||
165 | /** Recursively decodes all IFD's and | |
166 | * adds included TAGS into the metadata dictionary. */ | |
167 | int avpriv_exif_decode_ifd(AVCodecContext *avctx, GetByteContext *gbytes, int le, | |
168 | int depth, AVDictionary **metadata); | |
169 | ||
170 | #endif /* AVCODEC_EXIF_H */ |