Пример #1
0
        protected void GetBitmapMetadata(PhotoDetail photo)
        {
            using (FileStream fs = new FileStream(photo.FQPath, FileMode.Open))
            {
                JpegBitmapDecoder decoder  = new JpegBitmapDecoder(fs, BitmapCreateOptions.None, BitmapCacheOption.None);
                BitmapMetadata    metadata = decoder.Frames[0].Metadata as BitmapMetadata;

                string keywords  = "";
                string dateTaken = "";

                if (null != metadata)
                {
                    keywords  = metadata.Keywords.Aggregate((old, val) => old + ";" + val);
                    dateTaken = metadata.DateTaken;
                }

                if (getTags)
                {
                    photo.Tags = keywords;
                }

                if (getDateTaken && (!string.IsNullOrEmpty(dateTaken)))
                {
                    photo.DateTaken = DateTime.Parse(dateTaken);
                }

                fs.Close();
            }
        }
Пример #2
0
        public static void GetClosestLocationData(PhotoDetail photo)
        {
            // Build URL to request reverse geocoding lookup from google maps
            String latlng     = String.Format("{0},{1}", photo.Latitude, photo.Longitude);
            String requestURL = String.Format(ConfigurationManager.AppSettings["GPSReverseGeocodingLookupURL"], latlng);

            // Make the request
            using (HttpClient request = new HttpClient())
            {
                using (var response = request.GetAsync(requestURL).Result)
                {
                    if (response.IsSuccessStatusCode)
                    {
                        using (var responseContent = response.Content)
                        {
                            String   responseString = responseContent.ReadAsStringAsync().Result;
                            Location resultLocation = JsonConvert.DeserializeObject <Location>(responseString);

                            if (resultLocation.status != "OK" && resultLocation.status != "ZERO_RESULTS")
                            {
                                throw new Exception("Reverse geocoding request rejected with status: " + resultLocation.status);
                            }

                            photo.Location = resultLocation.GetLocation();
                        }
                    }
                    else // Reverse geocoding request failed
                    {
                        throw new Exception("Reverse geocoding request failed with status code: " + response.StatusCode);
                    }
                }
            }
        }
Пример #3
0
        public void GetPhotoMetadata(PhotoDetail photo)
        {
            if (getGPSCoordinates)
            {
                GetGPSCoordinatesFromPhoto(photo);
            }

            if (getTags || getDateTaken)
            {
                GetBitmapMetadata(photo);
            }
        }
Пример #4
0
        public static void InsertPhotoMetadata(PhotoDetail photo)
        {
            String insertQuery = "INSERT INTO `photos`(`filename`, `datetaken`, `latitude`, `longitude`, `locationstring`, `tagsstring`, `public`) " +
                                 "VALUES (@filename,@datetaken,@latitude,@longitude,@locationstring,@tagsstring,@public) " +
                                 "ON DUPLICATE KEY UPDATE `filename`=@filename, `datetaken`=@datetaken, `latitude`=@latitude, `longitude`=@longitude, `locationstring`=@locationstring, `tagsstring`=@tagsstring, `public`=@public";

            MySqlParameter[] insertParams = new MySqlParameter[7];
            insertParams[0] = new MySqlParameter("@filename", photo.FileName);
            insertParams[1] = new MySqlParameter("@datetaken", photo.DateTaken);
            insertParams[2] = new MySqlParameter("@latitude", photo.Latitude);
            insertParams[3] = new MySqlParameter("@longitude", photo.Longitude);
            insertParams[4] = new MySqlParameter("@locationstring", photo.Location);
            insertParams[5] = new MySqlParameter("@tagsstring", photo.Tags);
            insertParams[6] = new MySqlParameter("@public", photo.IsPublic);

            int rc = MySqlHelper.ExecuteNonQuery(ConnectionString, insertQuery, insertParams);
        }
Пример #5
0
        protected void GetGPSCoordinatesFromPhoto(PhotoDetail photo)
        {
            Double latitude           = Double.MinValue;
            Double longitude          = Double.MinValue;
            int    latitudeDirection  = int.MinValue;
            int    longitudeDirection = int.MinValue;
            bool   allInfoFound       = false;

            // Note, we make a new Bitmap here instead of using the .Preview member of the PhotoDetail object to save memory
            // That member will only be popluated if the user actually wants to view the preview
            using (Image img = new Bitmap(photo.FQPath))
            {
                PropertyItem[] propertyItems = img.PropertyItems;

                foreach (PropertyItem item in propertyItems)
                {
                    // Determine Latitute (0x0002) or Longitude (0x0004)
                    if (item.Id == 0x0002 || item.Id == 0x0004)
                    {
                        Double[] coordiantes = new Double[3];

                        for (int j = 0; j < 3; j++)
                        {
                            byte[] num = new byte[4];
                            byte[] den = new byte[4];

                            Array.Copy(item.Value, 0 + 8 * j, num, 0, 4);
                            Array.Copy(item.Value, 4 + 8 * j, den, 0, 4);

                            Int32 numerator   = BitConverter.ToInt32(num, 0);
                            Int32 denominator = BitConverter.ToInt32(den, 0);

                            coordiantes[j] = (double)numerator / (double)denominator;
                        }

                        // Now convert the coordinates into degrees (with decimals) only
                        Double degrees = coordiantes[0] + coordiantes[1] / 60.0 + coordiantes[2] / 3600.0;

                        if (item.Id == 0x0002)
                        {
                            latitude = degrees;
                        }
                        else
                        {
                            longitude = degrees;
                        }
                    }
                    // Determine direction for Latitude (0x0001) or Longitude (0x0003)
                    else if (item.Id == 0x0001 || item.Id == 0x0003)
                    {
                        String value = Encoding.ASCII.GetString(item.Value).Trim('\0');

                        if (String.Compare(value, "N", true) == 0)
                        {
                            latitudeDirection = 1;
                        }
                        else if (String.Compare(value, "S", true) == 0)
                        {
                            latitudeDirection = -1;
                        }
                        else if (String.Compare(value, "E", true) == 0)
                        {
                            longitudeDirection = 1;
                        }
                        else if (String.Compare(value, "W", true) == 0)
                        {
                            longitudeDirection = -1;
                        }
                        else
                        {
                            throw new Exception("Invalid Latitude or Longitude reference: \"" + value + "\"");
                        }
                    }

                    // Break early if all values are found
                    if (latitude != Double.MinValue && longitude != Double.MinValue && latitudeDirection != int.MinValue && longitudeDirection != int.MinValue)
                    {
                        allInfoFound = true;
                        break;
                    }
                }

                // Only proceed if all required info was found
                if (allInfoFound)
                {
                    // Combine degrees and direction
                    latitude  *= latitudeDirection;
                    longitude *= longitudeDirection;

                    // Save the latitude and longitude
                    photo.Latitude  = latitude;
                    photo.Longitude = longitude;
                }
                else
                {
                    throw new Exception("Failed to determine GPS coordinates");
                }
            }
        }