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libavcodec
exif.h
Go to the documentation of this file.
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/*
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* EXIF metadata parser
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* Copyright (c) 2013 Thilo Borgmann <thilo.borgmann _at_ mail.de>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* EXIF metadata parser
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* @author Thilo Borgmann <thilo.borgmann _at_ mail.de>
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*/
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#ifndef AVCODEC_EXIF_H
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#define AVCODEC_EXIF_H
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#include "
avcodec.h
"
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#include "
bytestream.h
"
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#include "
tiff.h
"
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#define EXIF_MAX_IFD_RECURSION 2
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#define EXIF_TAG_NAME_LENGTH 32
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struct
exif_tag
{
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char
name
[
EXIF_TAG_NAME_LENGTH
];
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uint16_t
id
;
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};
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static
const
struct
exif_tag
tag_list
[] = {
// JEITA CP-3451 EXIF specification:
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{
"GPSVersionID"
, 0x00},
// <- Table 12 GPS Attribute Information
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{
"GPSLatitudeRef"
, 0x01},
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{
"GPSLatitude"
, 0x02},
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{
"GPSLongitudeRef"
, 0x03},
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{
"GPSLongitude"
, 0x04},
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{
"GPSAltitudeRef"
, 0x05},
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{
"GPSAltitude"
, 0x06},
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{
"GPSTimeStamp"
, 0x07},
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{
"GPSSatellites"
, 0x08},
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{
"GPSStatus"
, 0x09},
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{
"GPSMeasureMode"
, 0x0A},
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{
"GPSDOP"
, 0x0B},
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{
"GPSSpeedRef"
, 0x0C},
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{
"GPSSpeed"
, 0x0D},
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{
"GPSTrackRef"
, 0x0E},
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{
"GPSTrack"
, 0x0F},
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{
"GPSImgDirectionRef"
, 0x10},
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{
"GPSImgDirection"
, 0x11},
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{
"GPSMapDatum"
, 0x12},
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{
"GPSDestLatitudeRef"
, 0x13},
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{
"GPSDestLatitude"
, 0x14},
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{
"GPSDestLongitudeRef"
, 0x15},
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{
"GPSDestLongitude"
, 0x16},
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{
"GPSDestBearingRef"
, 0x17},
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{
"GPSDestBearing"
, 0x18},
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{
"GPSDestDistanceRef"
, 0x19},
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{
"GPSDestDistance"
, 0x1A},
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{
"GPSProcessingMethod"
, 0x1B},
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{
"GPSAreaInformation"
, 0x1C},
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{
"GPSDateStamp"
, 0x1D},
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{
"GPSDifferential"
, 0x1E},
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{
"ImageWidth"
, 0x100},
// <- Table 3 TIFF Rev. 6.0 Attribute Information Used in Exif
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{
"ImageLength"
, 0x101},
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{
"BitsPerSample"
, 0x102},
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{
"Compression"
, 0x103},
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{
"PhotometricInterpretation"
, 0x106},
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{
"Orientation"
, 0x112},
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{
"SamplesPerPixel"
, 0x115},
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{
"PlanarConfiguration"
, 0x11C},
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{
"YCbCrSubSampling"
, 0x212},
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{
"YCbCrPositioning"
, 0x213},
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{
"XResolution"
, 0x11A},
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{
"YResolution"
, 0x11B},
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{
"ResolutionUnit"
, 0x128},
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{
"StripOffsets"
, 0x111},
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{
"RowsPerStrip"
, 0x116},
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{
"StripByteCounts"
, 0x117},
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{
"JPEGInterchangeFormat"
, 0x201},
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{
"JPEGInterchangeFormatLength"
,0x202},
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{
"TransferFunction"
, 0x12D},
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{
"WhitePoint"
, 0x13E},
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{
"PrimaryChromaticities"
, 0x13F},
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{
"YCbCrCoefficients"
, 0x211},
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{
"ReferenceBlackWhite"
, 0x214},
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{
"DateTime"
, 0x132},
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{
"ImageDescription"
, 0x10E},
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{
"Make"
, 0x10F},
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{
"Model"
, 0x110},
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{
"Software"
, 0x131},
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{
"Artist"
, 0x13B},
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{
"Copyright"
, 0x8298},
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{
"ExifVersion"
, 0x9000},
// <- Table 4 Exif IFD Attribute Information (1)
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{
"FlashpixVersion"
, 0xA000},
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{
"ColorSpace"
, 0xA001},
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{
"ComponentsConfiguration"
, 0x9101},
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{
"CompressedBitsPerPixel"
, 0x9102},
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{
"PixelXDimension"
, 0xA002},
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{
"PixelYDimension"
, 0xA003},
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{
"MakerNote"
, 0x927C},
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{
"UserComment"
, 0x9286},
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{
"RelatedSoundFile"
, 0xA004},
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{
"DateTimeOriginal"
, 0x9003},
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{
"DateTimeDigitized"
, 0x9004},
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{
"SubSecTime"
, 0x9290},
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{
"SubSecTimeOriginal"
, 0x9291},
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{
"SubSecTimeDigitized"
, 0x9292},
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{
"ImageUniqueID"
, 0xA420},
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{
"ExposureTime"
, 0x829A},
// <- Table 5 Exif IFD Attribute Information (2)
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{
"FNumber"
, 0x829D},
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{
"ExposureProgram"
, 0x8822},
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{
"SpectralSensitivity"
, 0x8824},
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{
"ISOSpeedRatings"
, 0x8827},
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{
"OECF"
, 0x8828},
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{
"ShutterSpeedValue"
, 0x9201},
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{
"ApertureValue"
, 0x9202},
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{
"BrightnessValue"
, 0x9203},
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{
"ExposureBiasValue"
, 0x9204},
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{
"MaxApertureValue"
, 0x9205},
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{
"SubjectDistance"
, 0x9206},
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{
"MeteringMode"
, 0x9207},
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{
"LightSource"
, 0x9208},
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{
"Flash"
, 0x9209},
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{
"FocalLength"
, 0x920A},
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{
"SubjectArea"
, 0x9214},
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{
"FlashEnergy"
, 0xA20B},
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{
"SpatialFrequencyResponse"
, 0xA20C},
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{
"FocalPlaneXResolution"
, 0xA20E},
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{
"FocalPlaneYResolution"
, 0xA20F},
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{
"FocalPlaneResolutionUnit"
, 0xA210},
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{
"SubjectLocation"
, 0xA214},
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{
"ExposureIndex"
, 0xA215},
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{
"SensingMethod"
, 0xA217},
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{
"FileSource"
, 0xA300},
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{
"SceneType"
, 0xA301},
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{
"CFAPattern"
, 0xA302},
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{
"CustomRendered"
, 0xA401},
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{
"ExposureMode"
, 0xA402},
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{
"WhiteBalance"
, 0xA403},
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{
"DigitalZoomRatio"
, 0xA404},
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{
"FocalLengthIn35mmFilm"
, 0xA405},
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{
"SceneCaptureType"
, 0xA406},
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{
"GainControl"
, 0xA407},
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{
"Contrast"
, 0xA408},
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{
"Saturation"
, 0xA409},
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{
"Sharpness"
, 0xA40A},
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{
"DeviceSettingDescription"
, 0xA40B},
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{
"SubjectDistanceRange"
, 0xA40C}
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// {"InteroperabilityIndex", 0x1}, // <- Table 13 Interoperability IFD Attribute Information
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// {"", 0x0}
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};
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/** Recursively decodes all IFD's and
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* adds included TAGS into the metadata dictionary. */
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int
avpriv_exif_decode_ifd
(
void
*logctx,
GetByteContext
*gbytes,
int
le
,
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int
depth
,
AVDictionary
**metadata);
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#endif
/* AVCODEC_EXIF_H */
GetByteContext
Definition:
bytestream.h:33
tag_list
static const struct exif_tag tag_list[]
Definition:
exif.h:43
tiff.h
TIFF tables.
EXIF_TAG_NAME_LENGTH
#define EXIF_TAG_NAME_LENGTH
Definition:
exif.h:36
AVDictionary
Definition:
dict.c:30
depth
int depth
Definition:
v4l.c:62
bytestream.h
le
uint8_t le
Definition:
crc.c:295
avcodec.h
Libavcodec external API header.
exif_tag::id
uint16_t id
Definition:
exif.h:40
avpriv_exif_decode_ifd
int avpriv_exif_decode_ifd(void *logctx, GetByteContext *gbytes, int le, int depth, AVDictionary **metadata)
Recursively decodes all IFD's and adds included TAGS into the metadata dictionary.
Definition:
exif.c:122
name
const char * name
Definition:
opengl_enc.c:103
exif_tag
Definition:
exif.h:38
Generated on Fri Jan 12 2018 01:45:38 for FFmpeg by
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