implement react-native plugin

react-native/android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.arthenica.ffmpegkit.reactnative">
+</manifest>

react-native/android/src/main/java/com/arthenica/ffmpegkit/reactnative/AsyncWriteToPipeTask.java

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+/*
+ * Copyright (c) 2021 Taner Sener
+ *
+ * This file is part of FFmpegKit.
+ *
+ * FFmpegKit is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * FFmpegKit is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with FFmpegKit.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.arthenica.ffmpegkit.reactnative;
+
+import static com.arthenica.ffmpegkit.reactnative.FFmpegKitReactNativeModule.LIBRARY_NAME;
+
+import android.util.Log;
+
+import com.facebook.react.bridge.Promise;
+
+import java.io.IOException;
+
+public class AsyncWriteToPipeTask implements Runnable {
+  private final String inputPath;
+  private final String namedPipePath;
+  private final Promise promise;
+
+  public AsyncWriteToPipeTask(final String inputPath, final String namedPipePath, final Promise promise) {
+    this.inputPath = inputPath;
+    this.namedPipePath = namedPipePath;
+    this.promise = promise;
+  }
+
+  @Override
+  public void run() {
+    int rc;
+
+    try {
+      final String asyncCommand = "cat " + inputPath + " > " + namedPipePath;
+      Log.d(LIBRARY_NAME, String.format("Starting copy %s to pipe %s operation.", inputPath, namedPipePath));
+
+      final long startTime = System.currentTimeMillis();
+
+      final Process process = Runtime.getRuntime().exec(new String[]{"sh", "-c", asyncCommand});
+      rc = process.waitFor();
+
+      final long endTime = System.currentTimeMillis();
+
+      Log.d(LIBRARY_NAME, String.format("Copying %s to pipe %s operation completed with rc %d in %d seconds.", inputPath, namedPipePath, rc, (endTime - startTime) / 1000));
+
+      promise.resolve(rc);
+
+    } catch (final IOException | InterruptedException e) {
+      Log.e(LIBRARY_NAME, String.format("Copy %s to pipe %s failed with error.", inputPath, namedPipePath), e);
+      promise.reject("Copy failed", String.format("Copy %s to pipe %s failed with error.", inputPath, namedPipePath), e);
+    }
+  }
+
+}

react-native/android/src/main/java/com/arthenica/ffmpegkit/reactnative/FFmpegKitReactNativePackage.java

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+/*
+ * Copyright (c) 2021 Taner Sener
+ *
+ * This file is part of FFmpegKit.
+ *
+ * FFmpegKit is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * FFmpegKit is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with FFmpegKit.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.arthenica.ffmpegkit.reactnative;
+
+import androidx.annotation.NonNull;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+
+import java.util.Collections;
+import java.util.List;
+
+public class FFmpegKitReactNativePackage implements ReactPackage {
+
+  @NonNull
+  @Override
+  public List<NativeModule> createNativeModules(@NonNull ReactApplicationContext reactContext) {
+    return Collections.singletonList(new FFmpegKitReactNativeModule(reactContext));
+  }
+
+  @NonNull
+  @Override
+  public List<ViewManager> createViewManagers(@NonNull ReactApplicationContext reactContext) {
+    return Collections.emptyList();
+  }
+
+}