rs_exif_tag2json/
lib.rs

1use std::io;
2
3use io::BufWriter;
4use io::Write;
5
6use exif::Context;
7use exif::Tag;
8
9#[derive(serde::Serialize)]
10pub struct TagDTO {
11    pub context: &'static str,
12    pub tag_num: u16,
13    pub name: String,
14}
15
16pub fn str2tag(s: &str, num: u16) -> Option<Tag> {
17    match s {
18        "tiff" => Some(Tag(Context::Tiff, num)),
19        "exif" => Some(Tag(Context::Exif, num)),
20        "gps" => Some(Tag(Context::Gps, num)),
21        "interop" => Some(Tag(Context::Interop, num)),
22        _ => None,
23    }
24}
25
26impl From<Tag> for TagDTO {
27    fn from(t: Tag) -> Self {
28        let ctx: Context = t.0;
29        let tag_num: u16 = t.1;
30        let context: &str = match ctx {
31            Context::Tiff => "tiff",
32            Context::Exif => "exif",
33            Context::Gps => "gps",
34            Context::Interop => "interop",
35            _ => "unspecified",
36        };
37        let name: String = format!("{t}");
38        Self {
39            context,
40            tag_num,
41            name,
42        }
43    }
44}
45
46pub fn tag2string(tag: Tag) -> String {
47    format!("{tag}")
48}
49
50pub const TAGS: &[Tag] = &[
51    Tag::Acceleration,
52    Tag::ApertureValue,
53    Tag::Artist,
54    Tag::BitsPerSample,
55    Tag::BodySerialNumber,
56    Tag::BrightnessValue,
57    Tag::CFAPattern,
58    Tag::CameraElevationAngle,
59    Tag::CameraOwnerName,
60    Tag::ColorSpace,
61    Tag::ComponentsConfiguration,
62    Tag::CompositeImage,
63    Tag::CompressedBitsPerPixel,
64    Tag::Compression,
65    Tag::Contrast,
66    Tag::Copyright,
67    Tag::CustomRendered,
68    Tag::DateTime,
69    Tag::DateTimeDigitized,
70    Tag::DateTimeOriginal,
71    Tag::DeviceSettingDescription,
72    Tag::DigitalZoomRatio,
73    Tag::ExifVersion,
74    Tag::ExposureBiasValue,
75    Tag::ExposureIndex,
76    Tag::ExposureMode,
77    Tag::ExposureProgram,
78    Tag::ExposureTime,
79    Tag::FNumber,
80    Tag::FileSource,
81    Tag::Flash,
82    Tag::FlashEnergy,
83    Tag::FlashpixVersion,
84    Tag::FocalLength,
85    Tag::FocalLengthIn35mmFilm,
86    Tag::FocalPlaneResolutionUnit,
87    Tag::FocalPlaneXResolution,
88    Tag::FocalPlaneYResolution,
89    Tag::GPSAltitude,
90    Tag::GPSAltitudeRef,
91    Tag::GPSAreaInformation,
92    Tag::GPSDOP,
93    Tag::GPSDateStamp,
94    Tag::GPSDestBearing,
95    Tag::GPSDestBearingRef,
96    Tag::GPSDestDistance,
97    Tag::GPSDestDistanceRef,
98    Tag::GPSDestLatitude,
99    Tag::GPSDestLatitudeRef,
100    Tag::GPSDestLongitude,
101    Tag::GPSDestLongitudeRef,
102    Tag::GPSDifferential,
103    Tag::GPSHPositioningError,
104    Tag::GPSImgDirection,
105    Tag::GPSImgDirectionRef,
106    Tag::GPSLatitude,
107    Tag::GPSLatitudeRef,
108    Tag::GPSLongitude,
109    Tag::GPSLongitudeRef,
110    Tag::GPSMapDatum,
111    Tag::GPSMeasureMode,
112    Tag::GPSProcessingMethod,
113    Tag::GPSSatellites,
114    Tag::GPSSpeed,
115    Tag::GPSSpeedRef,
116    Tag::GPSStatus,
117    Tag::GPSTimeStamp,
118    Tag::GPSTrack,
119    Tag::GPSTrackRef,
120    Tag::GPSVersionID,
121    Tag::GainControl,
122    Tag::Gamma,
123    Tag::Humidity,
124    Tag::ISOSpeed,
125    Tag::ISOSpeedLatitudeyyy,
126    Tag::ISOSpeedLatitudezzz,
127    Tag::ImageDescription,
128    Tag::ImageLength,
129    Tag::ImageUniqueID,
130    Tag::ImageWidth,
131    Tag::InteroperabilityIndex,
132    Tag::InteroperabilityVersion,
133    Tag::JPEGInterchangeFormat,
134    Tag::JPEGInterchangeFormatLength,
135    Tag::LensMake,
136    Tag::LensModel,
137    Tag::LensSerialNumber,
138    Tag::LensSpecification,
139    Tag::LightSource,
140    Tag::Make,
141    Tag::MakerNote,
142    Tag::MaxApertureValue,
143    Tag::MeteringMode,
144    Tag::Model,
145    Tag::OECF,
146    Tag::OffsetTime,
147    Tag::OffsetTimeDigitized,
148    Tag::OffsetTimeOriginal,
149    Tag::Orientation,
150    Tag::PhotographicSensitivity,
151    Tag::PhotometricInterpretation,
152    Tag::PixelXDimension,
153    Tag::PixelYDimension,
154    Tag::PlanarConfiguration,
155    Tag::Pressure,
156    Tag::PrimaryChromaticities,
157    Tag::RecommendedExposureIndex,
158    Tag::ReferenceBlackWhite,
159    Tag::RelatedImageFileFormat,
160    Tag::RelatedImageLength,
161    Tag::RelatedImageWidth,
162    Tag::RelatedSoundFile,
163    Tag::ResolutionUnit,
164    Tag::RowsPerStrip,
165    Tag::SamplesPerPixel,
166    Tag::Saturation,
167    Tag::SceneCaptureType,
168    Tag::SceneType,
169    Tag::SensingMethod,
170    Tag::SensitivityType,
171    Tag::Sharpness,
172    Tag::ShutterSpeedValue,
173    Tag::Software,
174    Tag::SourceExposureTimesOfCompositeImage,
175    Tag::SourceImageNumberOfCompositeImage,
176    Tag::SpatialFrequencyResponse,
177    Tag::SpectralSensitivity,
178    Tag::StandardOutputSensitivity,
179    Tag::StripByteCounts,
180    Tag::StripOffsets,
181    Tag::SubSecTime,
182    Tag::SubSecTimeDigitized,
183    Tag::SubSecTimeOriginal,
184    Tag::SubjectArea,
185    Tag::SubjectDistance,
186    Tag::SubjectDistanceRange,
187    Tag::SubjectLocation,
188    Tag::Temperature,
189    Tag::TileByteCounts,
190    Tag::TileOffsets,
191    Tag::TransferFunction,
192    Tag::UserComment,
193    Tag::WaterDepth,
194    Tag::WhiteBalance,
195    Tag::WhitePoint,
196    Tag::XResolution,
197    Tag::YCbCrCoefficients,
198    Tag::YCbCrPositioning,
199    Tag::YCbCrSubSampling,
200    Tag::YResolution,
201];
202
203pub fn print_tags() -> Result<(), io::Error> {
204    for tag in TAGS {
205        println!("{tag}");
206    }
207
208    Ok(())
209}
210
211pub fn tag2json<W>(tag: Tag, wtr: W) -> Result<(), io::Error>
212where
213    W: Write,
214{
215    let dto: TagDTO = tag.into();
216    serde_json::to_writer(wtr, &dto)?;
217    Ok(())
218}
219
220pub fn tags2json<W>(mut wtr: W) -> Result<(), io::Error>
221where
222    W: Write,
223{
224    for tag in TAGS {
225        tag2json(*tag, &mut wtr)?;
226        writeln!(&mut wtr)?;
227    }
228
229    wtr.flush()
230}
231
232pub fn tags2json2stdout() -> Result<(), io::Error> {
233    let o = io::stdout();
234    let mut ol = o.lock();
235    tags2json(BufWriter::new(&mut ol))?;
236    ol.flush()
237}
rs_exif_tag2json/lib.rs

rs_exif_tag2json/
lib.rs
