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Add NV21 support #1

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Add NV21 support #1

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118 changes: 67 additions & 51 deletions android/src/main/java/dev/zuzu/yuvtransform/YuvtransformPlugin.java
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Original file line number Diff line number Diff line change
@@ -1,67 +1,83 @@
package dev.zuzu.yuvtransform;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;

import androidx.annotation.NonNull;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;

import androidx.annotation.NonNull;

import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.MethodChannel.Result;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;


/** YuvtransformPlugin */
/**
* YuvtransformPlugin
*/
public class YuvtransformPlugin implements FlutterPlugin, MethodCallHandler {
/// The MethodChannel that will the communication between Flutter and native Android
///
/// This local reference serves to register the plugin with the Flutter Engine and unregister it
/// when the Flutter Engine is detached from the Activity
private MethodChannel channel;

@Override
public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "yuvtransform");
channel.setMethodCallHandler(this);
}

@Override
public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
if (call.method.equals("yuvtransform")) {
List<byte[]> bytesList = call.argument("platforms");
int[] strides = call.argument("strides");
int width = call.argument("width");
int height = call.argument("height");
int quality = call.argument("quality");

try {
byte[] data = YuvConverter.NV21toJPEG(YuvConverter.YUVtoNV21(bytesList, strides, width, height), width, height, 100);
Bitmap bitmapRaw = BitmapFactory.decodeByteArray(data, 0, data.length);

Matrix matrix = new Matrix();
matrix.postRotate(90);
Bitmap finalbitmap = Bitmap.createBitmap(bitmapRaw, 0, 0, bitmapRaw.getWidth(), bitmapRaw.getHeight(), matrix, true);
ByteArrayOutputStream outputStreamCompressed = new ByteArrayOutputStream();
finalbitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStreamCompressed);

result.success(outputStreamCompressed.toByteArray());
outputStreamCompressed.close();
data = null;
} catch (IOException e) {
e.printStackTrace();
}
} else {
result.notImplemented();
/// The MethodChannel that will the communication between Flutter and native Android
///
/// This local reference serves to register the plugin with the Flutter Engine and unregister it
/// when the Flutter Engine is detached from the Activity
private MethodChannel channel;

@Override
public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "yuvtransform");
channel.setMethodCallHandler(this);
}
}

@Override
public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
channel.setMethodCallHandler(null);
}
@Override
public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
int width = call.argument("width");
int height = call.argument("height");
int quality = call.argument("quality");

if (call.method.equals("nv21_to_jpeg")) {
byte[] bytes = call.argument("bytes");


byte[] data = YuvConverter.NV21toJPEG(bytes, width, height, quality);
convertToJPEG(result, quality, data);

} else if (call.method.equals("yuvtransform")) {
List<byte[]> bytesList = call.argument("platforms");
int[] strides = call.argument("strides");

byte[] data = YuvConverter.NV21toJPEG(YuvConverter.YUVtoNV21(bytesList, strides, width, height), width, height, quality);
convertToJPEG(result, quality, data);

} else {
result.notImplemented();
}
}

private static void convertToJPEG(Result result, int quality, byte[] data) {
try {
Bitmap bitmapRaw = BitmapFactory.decodeByteArray(data, 0, data.length);

Matrix matrix = new Matrix();
matrix.postRotate(90);
Bitmap finalbitmap = Bitmap.createBitmap(bitmapRaw, 0, 0, bitmapRaw.getWidth(), bitmapRaw.getHeight(), matrix, true);
ByteArrayOutputStream outputStreamCompressed = new ByteArrayOutputStream();
finalbitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStreamCompressed);

result.success(outputStreamCompressed.toByteArray());
outputStreamCompressed.close();
data = null;
} catch (IOException e) {
e.printStackTrace();
}
}

@Override
public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
channel.setMethodCallHandler(null);
}
}
3 changes: 1 addition & 2 deletions example/android/gradle/wrapper/gradle-wrapper.properties
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Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
#Fri Jun 23 08:50:38 CEST 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
4 changes: 2 additions & 2 deletions example/lib/yuv_transform_screen.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ class _YuvTransformScreenState extends State<YuvTransformScreen>
super.initState();
// Registers the page to observer for life cycle managing.
_imageResultProcessorService = ImageResultProcessorService();
WidgetsBinding.instance?.addObserver(this);
WidgetsBinding.instance.addObserver(this);
_subscription.add(_imageResultProcessorService.queue.listen((event) {
_isProcessing = false;
}));
Expand All @@ -32,7 +32,7 @@ class _YuvTransformScreenState extends State<YuvTransformScreen>

@override
void dispose() {
WidgetsBinding.instance?.removeObserver(this);
WidgetsBinding.instance.removeObserver(this);
// Dispose all streams!
_subscription.forEach((element) {
element.cancel();
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