Truxton exif get focal length offset

This API retrieves the offset into the parent file where the focal length value began.

Syntax

uint64_t truxton_exif_get_focal_length_offset( uint64_t exif_handle );

Parameters

exif_handle

This handle comes from calling truxton_exif_create() or truxton_file_create_exif().

Return value

The offset into the parent file where the focal length value began.

Sample

void dump_exif( uint64_t exif_handle )
{
   double floating_point_value = 0.0;
   uint64_t integer_value = 0;

   char id[ 65 ];

   truxton_exif_get_id( exif_handle, id, sizeof( id ) );
   printf( "ID: %s\n", id );

   truxton_exif_get_file_id( exif_handle, id, sizeof( id ) );
   printf( "File ID: %s\n", id );

   truxton_exif_get_media_id( exif_handle, id, sizeof( id ) );
   printf( "Media ID: %s\n", id );

   truxton_exif_get_make( exif_handle, id, sizeof( id ) );
   printf( "Make: %s\n", id );

   truxton_exif_get_model( exif_handle, id, sizeof( id ) );
   printf( "Model: %s\n", id );

   truxton_exif_get_body_serial_number( exif_handle, id, sizeof( id ) );
   printf( "Body serial number: %s\n", id );

   truxton_exif_get_lens_serial_number( exif_handle, id, sizeof( id ) );
   printf( "Lens serial number: %s\n", id );

   integer_value = truxton_exif_get_device_time( exif_handle );
   printf( "Device Time: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_gps_time( exif_handle );
   printf( "GPS Time: %" PRIu64 "\n", integer_value );

   floating_point_value = truxton_exif_get_focal_length( exif_handle );
   printf( "35mm Focal Length: %lf\n", floating_point_value );

   floating_point_value = truxton_exif_get_heading( exif_handle );
   printf( "Heading: %lf degrees\n", floating_point_value );

   floating_point_value = truxton_exif_get_latitude( exif_handle );
   printf( "Latitude: %lf degrees\n", floating_point_value );

   floating_point_value = truxton_exif_get_longitude( exif_handle );
   printf( "Longitude: %lf degrees\n", floating_point_value );

   floating_point_value = truxton_exif_get_altitude( exif_handle );
   printf( "Altitude: %lf meters\n", floating_point_value );

   integer_value = truxton_exif_get_shutter_count( exif_handle );
   printf( "Shutter Count: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_offset( exif_handle );
   printf( "EXIF Data Block found at offset %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_gps_time_offset( exif_handle );
   printf( "GPS Time offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_device_time_offset( exif_handle );
   printf( "Device Time offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_latitude_offset( exif_handle );
   printf( "Latitude offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_longitude_offset( exif_handle );
   printf( "Longitude offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_altitude_offset( exif_handle );
   printf( "Altitude offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_heading_offset( exif_handle );
   printf( "Heading offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_focal_length_offset( exif_handle );
   printf( "Focal Length offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_shutter_count_offset( exif_handle );
   printf( "Shutter Count offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_thumbnail_offset_offset( exif_handle );
   printf( "Thumbnail Offset offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_thumbnail_length_offset( exif_handle );
   printf( "Thumbnail Length offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_make_offset( exif_handle );
   printf( "Make offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_model_offset( exif_handle );
   printf( "Model offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_body_serial_number_offset( exif_handle );
   printf( "Body Serial Number offset: %" PRIu64 "\n", integer_value );

   integer_value = truxton_exif_get_lens_serial_number_offset( exif_handle );
   printf( "Lens Serial Number offset: %" PRIu64 "\n", integer_value );
}