Add ios implementation to take bytes

packages/firebase_ml_vision/ios/Classes/FirebaseMlVisionPlugin.m

@@ -36,7 +36,7 @@ - (instancetype)init {
 }
 
 - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result {
-  FIRVisionImage *image = [self filePathToVisionImage:call.arguments[@"path"]];
+  FIRVisionImage *image = [self dataToVisionImage:call.arguments];
   NSDictionary *options = call.arguments[@"options"];
   if ([@"BarcodeDetector#detectInImage" isEqualToString:call.method]) {
     [BarcodeDetector handleDetection:image options:options result:result];
@@ -53,8 +53,36 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
   }
 }
 
-- (FIRVisionImage *)filePathToVisionImage:(NSString *)path {
-  UIImage *image = [UIImage imageWithContentsOfFile:path];
-  return [[FIRVisionImage alloc] initWithImage:image];
+- (FIRVisionImage *)dataToVisionImage:(NSDictionary *)imageData {
+  NSString *imageType = imageData[@"type"];
+
+  if ([@"file" isEqualToString:imageType]) {
+    UIImage *image = [UIImage imageWithContentsOfFile:imageData[@"path"]];
+    return [[FIRVisionImage alloc] initWithImage:image];
+  } else if ([@"bytes" isEqualToString:imageType]) {
+    FlutterStandardTypedData *byteData = imageData[@"bytes"];
+    NSData *imageData = byteData.data;
+
+    CVPixelBufferRef pixelBuffer = NULL;
+    CVPixelBufferCreateWithBytes(NULL, 1080, 1920, kCVPixelFormatType_32BGRA, (void *) imageData.bytes, 4352, NULL, NULL, NULL, &pixelBuffer);
+
+    CMVideoFormatDescriptionRef description = NULL;
+    CMVideoFormatDescriptionCreateForImageBuffer(NULL, pixelBuffer, &description);
+
+    CMSampleTimingInfo timingInfo;
+    timingInfo.decodeTimeStamp = kCMTimeZero;
+    timingInfo.duration = kCMTimeInvalid;
+    timingInfo.presentationTimeStamp = kCMTimeInvalid;
+
+    CMSampleBufferRef samplebuffer = NULL;
+    CMSampleBufferCreateReadyWithImageBuffer(kCFAllocatorDefault, pixelBuffer, description, &timingInfo, &samplebuffer);
+
+    FIRVisionImage *image = [[FIRVisionImage alloc] initWithBuffer:samplebuffer];
+    return image;
+  } else {
+    // TODO(bmparr): Throw illegal argument exception
+  }
+
+  return nil;
 }
 @end