Implement quality option for ios

README.md

@@ -43,3 +43,9 @@ RNThumbnail.get(filepath).then((result) => {
   console.log(result.path); // thumbnail path
 })
 ```
+
+### Options
+
+`RNThumbnail.get` supports a second argument which is a object with the following possible options:
+
+- `timestamp` (currently `ios` only): The timestamp of the thumbnail in seconds (calculates the frame based on the FPS of the video). Default Value: `0`

index.js

@@ -1,6 +1,19 @@
 
-import { NativeModules } from 'react-native';
+import { NativeModules, Platform } from 'react-native';
 
-const { RNThumbnail } = NativeModules;
+const { RNThumbnail: NativeRNThumbnail } = NativeModules;
 
-export default RNThumbnail;
+const defaultOptions = {
+  timestamp: 0,
+  quality: 1
+}
+
+export default class RNThumbnail {
+  static get(path, options = {}) {
+    if (Platform.OS === 'ios') {
+      const mergedOptions = {...defaultOptions, ...options}
+      return NativeRNThumbnail.get(path, mergedOptions.timestamp, mergedOptions.quality)
+    }
+    return NativeRNThumbnail.get(path)
+  }
+};

ios/RNThumbnail.m

@@ -12,20 +12,29 @@ - (dispatch_queue_t)methodQueue
 }
 RCT_EXPORT_MODULE()
 
-RCT_EXPORT_METHOD(get:(NSString *)filepath resolve:(RCTPromiseResolveBlock)resolve
-                               reject:(RCTPromiseRejectBlock)reject)
+RCT_EXPORT_METHOD(get:(NSString *)filepath
+                  timestamp:(NSNumber * __nonnull)timestamp
+                  quality:(NSNumber * __nonnull)quality
+                  resolve:(RCTPromiseResolveBlock)resolve
+                  reject:(RCTPromiseRejectBlock)reject)
 {
     @try {
         filepath = [filepath stringByReplacingOccurrencesOfString:@"file://"
                                                   withString:@""];
         NSURL *vidURL = [NSURL fileURLWithPath:filepath];
 
         AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:vidURL options:nil];
+        int64_t value = 1;
+        if (timestamp != 0) {
+            AVAssetTrack * videoAssetTrack = [asset tracksWithMediaType: AVMediaTypeVideo].firstObject;
+            value = [timestamp longLongValue] * videoAssetTrack.nominalFrameRate;
+        }
+
         AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
         generator.appliesPreferredTrackTransform = YES;
 
         NSError *err = NULL;
-        CMTime time = CMTimeMake(1, 60);
+        CMTime time = CMTimeMake(value, 60);
 
         CGImageRef imgRef = [generator copyCGImageAtTime:time actualTime:NULL error:&err];
         UIImage *thumbnail = [UIImage imageWithCGImage:imgRef];
@@ -34,7 +43,7 @@ - (dispatch_queue_t)methodQueue
                                                                        NSUserDomainMask,
                                                                        YES) lastObject];
 
-        NSData *data = UIImageJPEGRepresentation(thumbnail, 1.0);
+        NSData *data = UIImageJPEGRepresentation(thumbnail, [quality floatValue]);
         NSFileManager *fileManager = [NSFileManager defaultManager];
         NSString *fullPath = [tempDirectory stringByAppendingPathComponent: [NSString stringWithFormat:@"thumb-%@.jpg", [[NSProcessInfo processInfo] globallyUniqueString]]];
         [fileManager createFileAtPath:fullPath contents:data attributes:nil];
@@ -48,4 +57,3 @@ - (dispatch_queue_t)methodQueue
 }
 
 @end
-