added exif lib

git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@567 67ed7778-7388-44ab-90cf-0a291f65f57c

1 files changed, 304 insertions, 0 deletions

diff --git a/libgphoto2/exif.h b/libgphoto2/exif.h
new file mode 100644
index 000000000..515118fed
--- /dev/null
+++ b/libgphoto2/exif.h
@@ -0,0 +1,304 @@
+#ifndef _gphoto_exif_
+#define _gphoto_exif_ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/times.h>
+#include <fcntl.h>
+
+/**
+ * EXIF file format support library. This API allows to parse, read and
+ * modify EXIF data structures. It provides a low-level API which allows
+ * to manipulate EXIF tags in a generic way, and a higher-level API which
+ * provides more advanced functions such as comment editing, thumbnail
+ * extraction, etc.
+ *
+ * In the future, vendor-proprietary exif extensions might be supported.
+ */
+
+
+/*
+ * Tag data type information.
+ */
+typedef enum {
+        EXIF_NOTYPE     = 0,    /* placeholder */
+        EXIF_BYTE       = 1,    /* 8-bit unsigned integer */
+        EXIF_ASCII      = 2,    /* 8-bit bytes w/ last byte null */
+        EXIF_SHORT      = 3,    /* 16-bit unsigned integer */
+        EXIF_LONG       = 4,    /* 32-bit unsigned integer */
+        EXIF_RATIONAL   = 5,    /* 64-bit unsigned fraction */
+        EXIF_SBYTE      = 6,    /* !8-bit signed integer */
+        EXIF_UNDEFINED  = 7,    /* !8-bit untyped data */
+        EXIF_SSHORT     = 8,    /* !16-bit signed integer */
+        EXIF_SLONG      = 9,    /* !32-bit signed integer */
+        EXIF_SRATIONAL  = 10,   /* !64-bit signed fraction */
+        EXIF_FLOAT      = 11,   /* !32-bit IEEE floating point */
+        EXIF_DOUBLE     = 12    /* !64-bit IEEE floating point */
+} EXIFDataType;
+
+
+typedef struct exif_parser {
+  char *header,*data,*ifds[10];
+  int ifdtags[10];  /* How many tags in each ifd */
+  int ifdcnt;       /* Number of IFD's, assumed to be < 10  */
+  unsigned int exiflen;
+  int preparsed,endian;
+} exifparser;
+
+typedef struct {
+    int tag;            // Tag ID, see exif_tags.h
+    EXIFDataType type;  // Tag data type, see exif_tags.h
+    int size;           // Length of the data, in bytes.
+    char *data;         // The data itself, not an offset
+    int num;     // When type is (s)rational, we
+    int den;   // store the value here...
+    int intval;
+} ExifData;
+
+static struct tagarray{
+  int num;
+  char* desc;
+} tagnames[]=
+{
+{0xFE, 	"NewSubFileType"},
+{0x100,	"ImageWidth"},
+{0x101,	"ImageLength"},
+{0x102,	"BitsPerSample"},
+{0x103,	"Compression"},
+{0x106,	"PhotometricInterpretation"},
+{0x10A,	"FillOrder"},
+{0x10D,	"DocumentName"},
+{0x10E,	"ImageDescription"},
+{0x10F,	"Make"},
+{0x110,	"Model"},
+{0x111,	"StripOffsets"},
+{0x112,	"Orientation"},
+{0x115,	"SamplesPerPixel"},
+{0x116,	"RowsPerStrip"},
+{0x117,	"StripByteCounts"},
+{0x11A,	"XResolution"},
+{0x11B,	"YResolution"},
+{0x11C,	"PlanarConfiguration"},
+{0x128,	"ResolutionUnit"},
+{0x12D,	"TransferFunction"},
+{0x131,	"Software"},
+{0x132,	"DateTime"},
+{0x13B,	"Artist"},
+{0x13E,	"WhitePoint"},
+{0x13F,	"PrimaryChromaticities"},
+{0x156,	"TransferRange"},
+{0x200,	"JPEGProc"},
+{0x201,	"JPEGInterchangeFormat"},
+{0x202,	"JPEGInterchangeFormatLength"},
+{0x211,	"YCbCrCoefficients"},
+{0x212,	"YCbCrSubSampling"},
+{0x213,	"YCbCrPositioning"},
+{0x214,	"ReferenceBlackWhite"},
+{0x828D,	"CFARepeatPatternDim"},
+{0x828E,	"CFAPattern"},
+{0x828F,	"BatteryLevel"},
+{0x8298,	"Copyright"},
+{0x829A,	"ExposureTime"},
+{0x829D,	"FNumber"},
+{0x83BB,	"IPTC/NAA"},
+{0x8769,	"ExifOffset"},
+{0x8773,	"InterColorProfile"},
+{0x8822,	"ExposureProgram"},
+{0x8824,	"SpectralSensitivity"},
+{0x8825,	"GPSInfo"},
+{0x8827,	"ISOSpeedRatings"},
+{0x8828,	"OECF"},
+{0x9000,	"ExifVersion"},
+{0x9003,	"DateTimeOriginal"},
+{0x9004,	"DateTimeDigitized"},
+{0x9101,	"ComponentsConfiguration"},
+{0x9102,	"CompressedBitsPerPixel"},
+{0x9201,	"ShutterSpeedValue"},
+{0x9202,	"ApertureValue"},
+{0x9203,	"BrightnessValue"},
+{0x9204,	"ExposureBiasValue"},
+{0x9205,	"MaxApertureValue"},
+{0x9206,	"SubjectDistance"},
+{0x9207,	"MeteringMode"},
+{0x9208,	"LightSource"},
+{0x9209,	"Flash"},
+{0x920A,	"FocalLength"},
+{0x927C,	"MakerNote"},
+{0x9286,	"UserComment"},
+{0x9290,	"SubSecTime"},
+{0x9291,	"SubSecTimeOriginal"},
+{0x9292,	"SubSecTimeDigitized"},
+{0xA000,	"FlashPixVersion"},
+{0xA001,	"ColorSpace"},
+{0xA002,	"ExifImageWidth"},
+{0xA003,	"ExifImageLength"},
+{0xA005,	"InteroperabilityOffset"},
+{0xA20B,	"FlashEnergy"},			
+{0xA20C,	"SpatialFrequencyResponse"},	
+{0xA20E,	"FocalPlaneXResolution"},	
+{0xA20F,	"FocalPlaneYResolution"},	
+{0xA210,	"FocalPlaneResolutionUnit"},	
+{0xA214,	"SubjectLocation"},		
+{0xA215,	"ExposureIndex"},		
+{0xA217,	"SensingMethod"},		
+{0xA300,	"FileSource"},
+{0xA301,	"Scenetype"},
+{0,"end"}
+};
+
+extern int exif_debug; /* Non-zero for debug messages */
+
+/**
+ * Parse an exif header, return size of the rest of the file.
+ */
+int exif_parse_data(exifparser *exifdat);
+
+/**
+ * Returns the value of a field, identified by its tag and the IFD.
+ */
+int exif_get_field( int tag_number, int ifd, exifparser *exifdat, ExifData *tag_data);
+
+/**
+ * Gets a numeric tag
+ */
+int exif_get_int_field( int tag_number, int ifd, exifparser *exifdat);
+
+/**
+ * Gets an ASCII tag.
+ */
+char * exif_get_ascii_field( int tag_number, int ifd, exifparser *exifdat);
+
+/**
+ * Returns the name of a given tag number
+ */
+char *exif_get_tagname(int tag_number);
+
+/**
+ * Returns a pointer to the thumbnail data if it
+ * exists.
+ */
+unsigned char *exif_get_thumbnail(exifparser *exifdat);
+
+/**
+ * Gets the comment field if it exists.
+ */
+int gpe_get_comment(exifparser *exifdat, char *comment);
+
+/**
+ * Sets the comment field.
+ */
+int gpe_set_comment(exifparser *exifdat, char *comment);
+
+/**************
+ * Now, all the 'defines'
+ */
+
+#define	EXIF_InteroperabilityIndex 0x1
+#define	EXIF_InteroperabilityVersion    0x2
+#define	EXIF_RelatedImageFileFormat 0x1000
+#define	EXIF_RelatedImageWidth 0x1001
+#define	EXIF_RelatedImageLength 0x1002
+
+#define EXIF_NewSubFileType              0xFE
+#define EXIF_ImageWidth                  0x100
+#define EXIF_ImageLength                 0x101
+#define EXIF_BitsPerSample               0x102
+#define EXIF_Compression                 0x103
+#define EXIF_PhotometricInterpretation   0x106
+#define EXIF_FillOrder                   0x10A
+#define EXIF_DocumentName                0x10D
+#define EXIF_ImageDescription            0x10E
+#define EXIF_Make                        0x10F
+#define EXIF_Model                       0x110
+#define EXIF_StripOffsets                0x111
+#define EXIF_Orientation                 0x112
+#define EXIF_SamplesPerPixel             0x115
+#define EXIF_RowsPerStrip                0x116
+#define EXIF_StripByteCounts             0x117
+#define EXIF_XResolution                 0x11A
+#define EXIF_YResolution                 0x11B
+#define EXIF_PlanarConfiguration         0x11C
+#define EXIF_ResolutionUnit              0x128
+#define EXIF_TransferFunction            0x12D
+#define EXIF_Software                    0x131
+#define EXIF_DateTime                    0x132
+#define EXIF_Artist                      0x13B
+#define EXIF_WhitePoint                  0x13E
+#define EXIF_PrimaryChromaticities       0x13F
+#define EXIF_TransferRange               0x156
+#define EXIF_JPEGProc                    0x200
+#define EXIF_JPEGInterchangeFormat       0x201
+#define EXIF_JPEGInterchangeFormatLength 0x202
+#define EXIF_YCbCrCoefficients           0x211
+#define EXIF_YCbCrSubSampling            0x212
+#define EXIF_YCbCrPositioning            0x213
+#define EXIF_ReferenceBlackWhite         0x214
+#define EXIF_CFARepeatPatternDim        0x828D
+#define EXIF_CFAPattern                 0x828E
+#define EXIF_BatteryLevel		0x828F
+#define EXIF_Copyright                  0x8298
+#define EXIF_ExposureTime               0x829A
+#define EXIF_FNumber                    0x829D
+/* Be careful: the next tag's official name is IPTC/NAA but
+   we can't do a define with a "/" */
+#define EXIF_IPTC_NAA                   0x83BB
+#define EXIF_ExifOffset                 0x8769
+#define EXIF_InterColorProfile          0x8773
+#define EXIF_ExposureProgram            0x8822
+#define EXIF_SpectralSensitivity        0x8824
+#define EXIF_GPSInfo                    0x8825
+#define EXIF_ISOSpeedRatings            0x8827
+#define EXIF_OECF                       0x8828
+#define EXIF_ExifVersion                0x9000
+#define EXIF_DateTimeOriginal           0x9003
+#define EXIF_DateTimeDigitized          0x9004
+#define EXIF_ComponentsConfiguration    0x9101
+#define EXIF_CompressedBitsPerPixel     0x9102
+#define EXIF_ShutterSpeedValue          0x9201
+#define EXIF_ApertureValue              0x9202
+#define EXIF_BrightnessValue            0x9203
+#define EXIF_ExposureBiasValue          0x9204
+#define EXIF_MaxApertureValue           0x9205
+#define EXIF_SubjectDistance            0x9206
+#define EXIF_MeteringMode               0x9207
+#define EXIF_LightSource                0x9208
+#define EXIF_Flash                      0x9209
+#define EXIF_FocalLength                0x920A
+#define EXIF_MakerNote                  0x927C
+#define EXIF_UserComment                0x9286
+#define EXIF_SubSecTime                 0x9290
+#define EXIF_SubSecTimeOriginal         0x9291
+#define EXIF_SubSecTimeDigitized        0x9292
+#define EXIF_FlashPixVersion            0xA000
+#define EXIF_ColorSpace                 0xA001
+#define EXIF_ExifImageWidth             0xA002
+#define EXIF_ExifImageLength            0xA003
+#define EXIF_InteroperabilityOffset     0xA005
+#define EXIF_FlashEnergy                0xA20B  # 0x920B in TIFF/EP
+#define EXIF_SpatialFrequencyResponse   0xA20C  # 0x920C    -  -
+#define EXIF_FocalPlaneXResolution      0xA20E  # 0x920E    -  -
+#define EXIF_FocalPlaneYResolution      0xA20F  # 0x920F    -  -
+#define EXIF_FocalPlaneResolutionUnit   0xA210  # 0x9210    -  -
+#define EXIF_SubjectLocation            0xA214  # 0x9214    -  -
+#define EXIF_ExposureIndex              0xA215  # 0x9215    -  -
+#define EXIF_SensingMethod              0xA217  # 0x9217    -  -
+#define EXIF_FileSource                 0xA300
+#define EXIF_SceneType                  0xA301
+
+#endif /* _gphoto_exif_ */
+
+
+
+
+
+
+
+
+
+
+
+