diff options
Diffstat (limited to 'src/android/jpeg/exif.cpp')
| -rw-r--r-- | src/android/jpeg/exif.cpp | 182 |
1 files changed, 168 insertions, 14 deletions
diff --git a/src/android/jpeg/exif.cpp b/src/android/jpeg/exif.cpp index 204a237a..fdd46070 100644 --- a/src/android/jpeg/exif.cpp +++ b/src/android/jpeg/exif.cpp @@ -7,7 +7,11 @@ #include "exif.h" +#include <cmath> +#include <iomanip> #include <map> +#include <sstream> +#include <tuple> #include <uchar.h> #include "libcamera/internal/log.h" @@ -151,6 +155,16 @@ ExifEntry *Exif::createEntry(ExifIfd ifd, ExifTag tag, ExifFormat format, return entry; } +void Exif::setByte(ExifIfd ifd, ExifTag tag, uint8_t item) +{ + ExifEntry *entry = createEntry(ifd, tag, EXIF_FORMAT_BYTE, 1, 1); + if (!entry) + return; + + entry->data[0] = item; + exif_entry_unref(entry); +} + void Exif::setShort(ExifIfd ifd, ExifTag tag, uint16_t item) { ExifEntry *entry = createEntry(ifd, tag); @@ -267,7 +281,7 @@ void Exif::setSize(const Size &size) setLong(EXIF_IFD_EXIF, EXIF_TAG_PIXEL_X_DIMENSION, size.width); } -void Exif::setTimestamp(time_t timestamp) +void Exif::setTimestamp(time_t timestamp, std::chrono::milliseconds msec) { struct tm tm; localtime_r(×tamp, &tm); @@ -282,19 +296,126 @@ void Exif::setTimestamp(time_t timestamp) /* Query and set timezone information if available. */ int r = strftime(str, sizeof(str), "%z", &tm); - if (r > 0) { - std::string tz(str); - tz.insert(3, 1, ':'); - setString(EXIF_IFD_EXIF, - static_cast<ExifTag>(_ExifTag::OFFSET_TIME), - EXIF_FORMAT_ASCII, tz); - setString(EXIF_IFD_EXIF, - static_cast<ExifTag>(_ExifTag::OFFSET_TIME_ORIGINAL), - EXIF_FORMAT_ASCII, tz); - setString(EXIF_IFD_EXIF, - static_cast<ExifTag>(_ExifTag::OFFSET_TIME_DIGITIZED), - EXIF_FORMAT_ASCII, tz); - } + if (r <= 0) + return; + + std::string tz(str); + tz.insert(3, 1, ':'); + setString(EXIF_IFD_EXIF, + static_cast<ExifTag>(_ExifTag::OFFSET_TIME), + EXIF_FORMAT_ASCII, tz); + setString(EXIF_IFD_EXIF, + static_cast<ExifTag>(_ExifTag::OFFSET_TIME_ORIGINAL), + EXIF_FORMAT_ASCII, tz); + setString(EXIF_IFD_EXIF, + static_cast<ExifTag>(_ExifTag::OFFSET_TIME_DIGITIZED), + EXIF_FORMAT_ASCII, tz); + + std::stringstream sstr; + sstr << std::setfill('0') << std::setw(3) << msec.count(); + std::string subsec = sstr.str(); + + setString(EXIF_IFD_EXIF, EXIF_TAG_SUB_SEC_TIME, + EXIF_FORMAT_ASCII, subsec); + setString(EXIF_IFD_EXIF, EXIF_TAG_SUB_SEC_TIME_ORIGINAL, + EXIF_FORMAT_ASCII, subsec); + setString(EXIF_IFD_EXIF, EXIF_TAG_SUB_SEC_TIME_DIGITIZED, + EXIF_FORMAT_ASCII, subsec); +} + +void Exif::setGPSDateTimestamp(time_t timestamp) +{ + struct tm tm; + gmtime_r(×tamp, &tm); + + char str[11]; + strftime(str, sizeof(str), "%Y:%m:%d", &tm); + std::string tsStr(str); + + setString(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_DATE_STAMP), + EXIF_FORMAT_ASCII, tsStr); + + /* Set GPS_TIME_STAMP */ + ExifEntry *entry = + createEntry(EXIF_IFD_GPS, + static_cast<ExifTag>(EXIF_TAG_GPS_TIME_STAMP), + EXIF_FORMAT_RATIONAL, 3, 3 * sizeof(ExifRational)); + if (!entry) + return; + + ExifRational ts[] = { + { static_cast<ExifLong>(tm.tm_hour), 1 }, + { static_cast<ExifLong>(tm.tm_min), 1 }, + { static_cast<ExifLong>(tm.tm_sec), 1 }, + }; + + for (int i = 0; i < 3; i++) + exif_set_rational(entry->data + i * sizeof(ExifRational), + order_, ts[i]); + + exif_entry_unref(entry); +} + +std::tuple<int, int, int> Exif::degreesToDMS(double decimalDegrees) +{ + int degrees = std::trunc(decimalDegrees); + double minutes = std::abs((decimalDegrees - degrees) * 60); + double seconds = (minutes - std::trunc(minutes)) * 60; + + return { degrees, std::trunc(minutes), std::round(seconds) }; +} + +void Exif::setGPSDMS(ExifIfd ifd, ExifTag tag, int deg, int min, int sec) +{ + ExifEntry *entry = createEntry(ifd, tag, EXIF_FORMAT_RATIONAL, 3, + 3 * sizeof(ExifRational)); + if (!entry) + return; + + ExifRational coords[] = { + { static_cast<ExifLong>(deg), 1 }, + { static_cast<ExifLong>(min), 1 }, + { static_cast<ExifLong>(sec), 1 }, + }; + + for (int i = 0; i < 3; i++) + exif_set_rational(entry->data + i * sizeof(ExifRational), + order_, coords[i]); + + exif_entry_unref(entry); +} + +/* + * \brief Set GPS location (lat, long, alt) + * \param[in] coords Pointer to coordinates latitude, longitude, and altitude, + * first two in degrees, the third in meters + */ +void Exif::setGPSLocation(const double *coords) +{ + int deg, min, sec; + + std::tie<int, int, int>(deg, min, sec) = degreesToDMS(coords[0]); + setString(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_LATITUDE_REF), + EXIF_FORMAT_ASCII, deg >= 0 ? "N" : "S"); + setGPSDMS(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_LATITUDE), + std::abs(deg), min, sec); + + std::tie<int, int, int>(deg, min, sec) = degreesToDMS(coords[1]); + setString(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_LONGITUDE_REF), + EXIF_FORMAT_ASCII, deg >= 0 ? "E" : "W"); + setGPSDMS(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_LATITUDE), + std::abs(deg), min, sec); + + setByte(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_ALTITUDE_REF), + coords[2] >= 0 ? 0 : 1); + setRational(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_ALTITUDE), + ExifRational{ static_cast<ExifLong>(std::abs(coords[2])), 1 }); +} + +void Exif::setGPSMethod(const std::string &method) +{ + setString(EXIF_IFD_GPS, static_cast<ExifTag>(EXIF_TAG_GPS_PROCESSING_METHOD), + EXIF_FORMAT_UNDEFINED, method, Unicode); } void Exif::setOrientation(int orientation) @@ -333,6 +454,39 @@ void Exif::setThumbnail(Span<const unsigned char> thumbnail, setShort(EXIF_IFD_0, EXIF_TAG_COMPRESSION, compression); } +void Exif::setFocalLength(float length) +{ + ExifRational rational = { static_cast<ExifLong>(length * 1000), 1000 }; + setRational(EXIF_IFD_EXIF, EXIF_TAG_FOCAL_LENGTH, rational); +} + +void Exif::setExposureTime(uint64_t nsec) +{ + ExifRational rational = { static_cast<ExifLong>(nsec), 1000000000 }; + setRational(EXIF_IFD_EXIF, EXIF_TAG_EXPOSURE_TIME, rational); +} + +void Exif::setAperture(float size) +{ + ExifRational rational = { static_cast<ExifLong>(size * 10000), 10000 }; + setRational(EXIF_IFD_EXIF, EXIF_TAG_FNUMBER, rational); +} + +void Exif::setISO(uint16_t iso) +{ + setShort(EXIF_IFD_EXIF, EXIF_TAG_ISO_SPEED_RATINGS, iso); +} + +void Exif::setFlash(Flash flash) +{ + setShort(EXIF_IFD_EXIF, EXIF_TAG_FLASH, static_cast<ExifShort>(flash)); +} + +void Exif::setWhiteBalance(WhiteBalance wb) +{ + setShort(EXIF_IFD_EXIF, EXIF_TAG_WHITE_BALANCE, static_cast<ExifShort>(wb)); +} + /** * \brief Convert UTF-8 string to UTF-16 string * \param[in] str String to convert |