Merge pull request #145 from Apparence-io/feature/exif-gps-location

✨ Add Exif gps location

Author: Dimitri Dessus

README.md

@@ -29,6 +29,7 @@ CamerAwesome include a lot of useful features like:
 - 🎮 Complete example.
 - 🎞 Taking a **picture** ( of course 😃 ).
 - 🎥 Video recording (iOS only for now).
+- 🛰 **GPS Location** saved in image (iOS only for now).
 
 ## 🧐  Live example
 
@@ -54,6 +55,9 @@ CamerAwesome include a lot of useful features like:
 
 <key>NSMicrophoneUsageDescription</key>
 <string>To enable microphone access when recording video</string>
+
+<key>NSLocationWhenInUseUsageDescription</key>
+<string>To enable GPS location access for Exif data</string>
 ```
 
   - **Android**
@@ -155,6 +159,7 @@ _captureMode.value = CaptureModes.VIDEO;
 | captureMode          | ```ValueNotifier<CaptureModes>```      | choose capture mode between **PHOTO** or **VIDEO**                                          |          |
 | fitted               | ```bool```                             | whether camera preview must be as big as it needs or cropped to fill with. false by default |          |
 | imagesStreamBuilder  | ```Function```                         | returns an imageStream when camera has started preview                                      |          |
+| savedExifData        | ```SavedExifData```                    | set exif data when a picture was taken, GPS location can be saved to image file for ex.     |          |
 
 </p>
 </details>

example/ios/Runner.xcodeproj/project.pbxproj

@@ -499,7 +499,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = Q8N2T428YG;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -806,7 +806,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = Q8N2T428YG;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -839,7 +839,7 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = Q8N2T428YG;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",

example/ios/Runner/Info.plist

@@ -2,6 +2,8 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>
@@ -29,6 +31,8 @@
 	</dict>
 	<key>NSCameraUsageDescription</key>
 	<string>To enable camera access</string>
+	<key>NSLocationWhenInUseUsageDescription</key>
+	<string>To enable location access for Exif data</string>
 	<key>NSMicrophoneUsageDescription</key>
 	<string>To enable microphone access</string>
 	<key>UILaunchStoryboardName</key>
@@ -50,7 +54,5 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
-	<key>CADisableMinimumFrameDurationOnPhone</key>
-	<true/>
 </dict>
 </plist>

example/lib/main.dart

@@ -6,6 +6,7 @@ import 'package:camerawesome_example/widgets/bottom_bar.dart';
 import 'package:camerawesome_example/widgets/camera_preview.dart';
 import 'package:camerawesome_example/widgets/preview_card.dart';
 import 'package:camerawesome_example/widgets/top_bar.dart';
+import 'package:exif/exif.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:image/image.dart' as imgUtils;
@@ -57,6 +58,10 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
   // StreamSubscription<Uint8List> previewStreamSub;
   Stream<Uint8List> previewStream;
 
+  ExifPreferences _exifPreferences = ExifPreferences(
+    saveGPSLocation: false,
+  );
+
   @override
   void initState() {
     super.initState();
@@ -126,6 +131,11 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
               switchFlash: _switchFlash,
               orientation: _orientation,
               rotationController: _iconsAnimationController,
+              exifPreferences: _exifPreferences,
+              onSetExifPreferences: (newExifData) {
+                _pictureController.setExifPreferences(newExifData);
+                setState(() {});
+              },
               onFlashTap: () {
                 switch (_switchFlash.value) {
                   case CameraFlashes.NONE:
@@ -218,11 +228,17 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
       _previewAnimationController.reset();
     }
     _previewAnimationController.forward();
+    final bytes = file.readAsBytesSync();
     print("----------------------------------");
     print("TAKE PHOTO CALLED");
     print("==> hastakePhoto : ${file.exists()} | path : $filePath");
-    final img = imgUtils.decodeImage(file.readAsBytesSync());
+    final img = imgUtils.decodeImage(bytes);
     print("==> img.width : ${img.width} | img.height : ${img.height}");
+    final exifData = await readExifFromBytes(bytes);
+    for (var exif in exifData.entries) {
+      print("==> exifData : ${exif.key} : ${exif.value}");
+    }
+
     print("----------------------------------");
   }
 
@@ -360,6 +376,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
             this._availableSizes = availableSizes;
             return availableSizes[0];
           },
+          exifPreferences: _exifPreferences,
           captureMode: _captureMode,
           photoSize: _photoSize,
           sensor: _sensor,
@@ -407,6 +424,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
                 this._availableSizes = availableSizes;
                 return availableSizes[0];
               },
+              exifPreferences: _exifPreferences,
               captureMode: _captureMode,
               photoSize: _photoSize,
               sensor: _sensor,

example/lib/widgets/top_bar.dart

@@ -1,3 +1,4 @@
+import 'package:camerawesome/camerawesome_plugin.dart';
 import 'package:camerawesome/models/capture_modes.dart';
 import 'package:camerawesome/models/flashmodes.dart';
 import 'package:camerawesome/models/orientations.dart';
@@ -15,12 +16,14 @@ class TopBarWidget extends StatelessWidget {
   final ValueNotifier<bool> enableAudio;
   final ValueNotifier<CameraFlashes> switchFlash;
   final ValueNotifier<bool> enablePinchToZoom;
+  final ExifPreferences exifPreferences;
   final Function onFullscreenTap;
   final Function onResolutionTap;
   final Function onChangeSensorTap;
   final Function onFlashTap;
   final Function onAudioChange;
   final Function onPinchToZoomChange;
+  final Function onSetExifPreferences;
 
   const TopBarWidget({
     Key key,
@@ -39,6 +42,8 @@ class TopBarWidget extends StatelessWidget {
     @required this.onChangeSensorTap,
     @required this.onResolutionTap,
     @required this.onPinchToZoomChange,
+    @required this.exifPreferences,
+    @required this.onSetExifPreferences,
   }) : super(key: key);
 
   @override
@@ -115,24 +120,44 @@ class TopBarWidget extends StatelessWidget {
             children: [
               OptionButton(
                 rotationController: rotationController,
-                icon: enablePinchToZoom.value ? Icons.pinch_rounded : Icons.pinch_outlined,
+                icon: enablePinchToZoom.value
+                    ? Icons.pinch_rounded
+                    : Icons.pinch_outlined,
                 orientation: orientation,
                 onTapCallback: () => onPinchToZoomChange?.call(),
               ),
               captureMode.value == CaptureModes.VIDEO
                   ? Padding(
-                    padding: const EdgeInsets.only(left: 20.0),
-                    child: OptionButton(
+                      padding: const EdgeInsets.only(left: 20.0),
+                      child: OptionButton(
                         icon: enableAudio.value ? Icons.mic : Icons.mic_off,
                         rotationController: rotationController,
                         orientation: orientation,
                         isEnabled: !isRecording,
                         onTapCallback: () => onAudioChange?.call(),
                       ),
-                  )
+                    )
                   : Container(),
             ],
           ),
+          SizedBox(height: 20.0),
+          Row(
+            mainAxisAlignment: MainAxisAlignment.end,
+            children: [
+              OptionButton(
+                rotationController: rotationController,
+                icon: exifPreferences.saveGPSLocation
+                    ? Icons.gps_fixed_rounded
+                    : Icons.gps_not_fixed_outlined,
+                orientation: orientation,
+                onTapCallback: () {
+                  exifPreferences.saveGPSLocation =
+                      !exifPreferences.saveGPSLocation;
+                  onSetExifPreferences?.call(exifPreferences);
+                },
+              ),
+            ],
+          ),
         ],
       ),
     );

example/pubspec.lock

@@ -8,6 +8,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.3.0"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.1"
   async:
     dependency: transitive
     description:
@@ -50,6 +57,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.16.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.2"
   crypto:
     dependency: transitive
     description:
@@ -71,6 +85,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.5"
+  exif:
+    dependency: "direct main"
+    description:
+      name: exif
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.2"
   fake_async:
     dependency: transitive
     description:
@@ -143,6 +164,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.6.4"
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.7.0"
   matcher:
     dependency: transitive
     description:
@@ -267,6 +295,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.9.0"
+  sprintf:
+    dependency: transitive
+    description:
+      name: sprintf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.0.2"
   stack_trace:
     dependency: transitive
     description:

example/pubspec.yaml

@@ -18,6 +18,7 @@ dependencies:
   path_provider: ^2.0.2
   rxdart: ^0.27.1
   video_player: ^2.1.6
+  exif: ^3.1.2
 
 dev_dependencies:
   integration_test:

ios/Classes/CameraPermissions.m

@@ -10,22 +10,22 @@
 @implementation CameraPermissions
 
 + (BOOL)checkPermissions {
-    NSString *mediaType = AVMediaTypeVideo;
-    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
-    
-    __block BOOL permissionsGranted;
-    if (authStatus == AVAuthorizationStatusNotDetermined) {
-        dispatch_semaphore_t sem = dispatch_semaphore_create(0);
-         [AVCaptureDevice requestAccessForMediaType:mediaType completionHandler:^(BOOL granted) {
-           permissionsGranted = granted;
-           dispatch_semaphore_signal(sem);
-         }];
-        dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
-    } else {
-      permissionsGranted = (authStatus == AVAuthorizationStatusAuthorized);
-    }
-    
-    return permissionsGranted;
+  NSString *mediaType = AVMediaTypeVideo;
+  AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
+  
+  __block BOOL permissionsGranted;
+  if (authStatus == AVAuthorizationStatusNotDetermined) {
+    dispatch_semaphore_t sem = dispatch_semaphore_create(0);
+    [AVCaptureDevice requestAccessForMediaType:mediaType completionHandler:^(BOOL granted) {
+      permissionsGranted = granted;
+      dispatch_semaphore_signal(sem);
+    }];
+    dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
+  } else {
+    permissionsGranted = (authStatus == AVAuthorizationStatusAuthorized);
+  }
+  
+  return permissionsGranted;
 }
 
 @end

ios/Classes/CameraPreview/CameraPreview.h

@@ -11,6 +11,7 @@
 #import <Foundation/Foundation.h>
 
 #import "MotionController.h"
+#import "LocationController.h"
 #import "VideoController.h"
 #import "ImageStreamController.h"
 #import "CameraSensor.h"
@@ -40,14 +41,16 @@ AVCaptureAudioDataOutputSampleBufferDelegate>
 @property(readonly, nonatomic) CaptureModes captureMode;
 @property(readonly, nonatomic) FlutterResult result;
 @property(readonly, nonatomic) NSString *currentPresset;
+@property(readonly, nonatomic) bool saveGPSLocation;
 @property(readonly, nonatomic) NSObject<FlutterBinaryMessenger> *messenger;
 @property(readonly) CVPixelBufferRef volatile latestPixelBuffer;
 @property(readonly, nonatomic) CGSize currentPreviewSize;
 @property(readonly, nonatomic) ImageStreamController *imageStreamController;
 @property(readonly, nonatomic) MotionController *motionController;
+@property(readonly, nonatomic) LocationController *locationController;
 @property(readonly, nonatomic) VideoController *videoController;
 @property(nonatomic, copy) void (^onFrameAvailable)(void);
-    
+
 - (instancetype)initWithCameraSensor:(CameraSensor)sensor
                         streamImages:(BOOL)streamImages
                          captureMode:(CaptureModes)captureMode
@@ -61,6 +64,7 @@ AVCaptureAudioDataOutputSampleBufferDelegate>
 - (void)setFlashMode:(CameraFlashMode)flashMode;
 - (void)setCaptureMode:(CaptureModes)captureMode;
 - (void)setRecordingAudioMode:(bool)enableAudio;
+- (void)setExifPreferencesGPSLocation:(bool)gpsLocation;
 - (void)refresh;
 - (void)start;
 - (void)stop;