/* * The MIT License (MIT) * * Copyright (c) 2016 Piasy * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.github.piasy.cameracompat.compat; import android.Manifest; import android.content.Context; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.github.piasy.cameracompat.CameraCompat; import com.github.piasy.cameracompat.R; import com.github.piasy.cameracompat.compat.events.SwitchBeautifyEvent; import com.github.piasy.cameracompat.compat.events.SwitchCameraEvent; import com.github.piasy.cameracompat.compat.events.SwitchFlashEvent; import com.github.piasy.cameracompat.compat.events.SwitchMirrorEvent; import com.github.piasy.cameracompat.processor.GPUImageChain; import com.github.piasy.cameracompat.processor.ProcessorChain; import com.github.piasy.safelyandroid.misc.CheckUtil; import com.hannesdorfmann.fragmentargs.annotation.Arg; import com.tbruyelle.rxpermissions2.RxPermissions; import io.reactivex.disposables.Disposable; import javax.annotation.concurrent.GuardedBy; import org.greenrobot.eventbus.EventBus; import org.greenrobot.eventbus.Subscribe; import org.greenrobot.eventbus.ThreadMode; /** * Created by Piasy{github.com/Piasy} on 6/29/16. */ abstract class PreviewFragment extends Fragment { @GuardedBy("this") protected ProcessorChain mProcessorChain; @Arg int mPreviewWidth; @Arg int mPreviewHeight; @Arg boolean mIsDefaultFrontCamera; @Arg boolean mIsDefaultFlashOpen; @Arg boolean mIsDefaultBeautifyOn; @Arg boolean mIsDefaultMirrorEnabled; private ViewGroup mPreviewContainer; private CameraHelper mCameraHelper; @GuardedBy("this") private EventBus mEventBus; private Disposable mPermissionRequest; public PreviewFragment() { // Required empty public constructor } @Override public void onAttach(Context context) { super.onAttach(context); try { mProcessorChain = CameraCompat.getInstance().getProcessorChain(); mEventBus = CameraCompat.getInstance().getEventBus(); } catch (IllegalStateException e) { // this could happen when the host Activity is recreated, and before user init // CameraCompat instance, this preview fragment get attached. // currently we could only cover this problem to avoid crash, but // TODO: 27/10/2016 could we notify user that error happen? // although leave this Activity and enter again would solve this problem mProcessorChain = NoOpChain.INSTANCE; mEventBus = EventBus.getDefault(); } } @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRetainInstance(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mEventBus.register(this); mProcessorChain.setUp(); return inflater.inflate(R.layout.preview_fragment, container, false); } @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); mPreviewContainer = (ViewGroup) view.findViewById(R.id.mPreviewContainer); mPreviewContainer.addView(mProcessorChain.createSurface(getContext())); mCameraHelper = createCameraHelper(); mProcessorChain.initSurface(getContext()); } @Override public void onResume() { super.onResume(); disposePermissionRequest(); mPermissionRequest = RxPermissions.getInstance(getContext()) .request(Manifest.permission.CAMERA) .subscribe(grant -> { if (grant && CheckUtil.nonNull(mCameraHelper)) { mCameraHelper.startPreview(); } else { CameraCompat.onError(CameraCompat.ERR_PERMISSION); } }, throwable -> CameraCompat.onError(CameraCompat.ERR_PERMISSION)); } @Override public void onPause() { super.onPause(); if (CheckUtil.nonNull(mCameraHelper)) { mCameraHelper.stopPreview(); } } @Override public void onDestroyView() { super.onDestroyView(); mEventBus.unregister(this); mProcessorChain.tearDown(); disposePermissionRequest(); } @Override public void onDetach() { super.onDetach(); synchronized (this) { mProcessorChain = null; mEventBus = null; } } private void disposePermissionRequest() { if (mPermissionRequest != null && !mPermissionRequest.isDisposed()) { mPermissionRequest.dispose(); mPermissionRequest = null; } } protected abstract CameraHelper createCameraHelper(); @Subscribe(threadMode = ThreadMode.ASYNC) public synchronized void onSwitchBeautify(SwitchBeautifyEvent event) { if (isResumed() && mProcessorChain instanceof GPUImageChain) { ((GPUImageChain) mProcessorChain).switchBeautify(); } } @Subscribe(threadMode = ThreadMode.ASYNC) public synchronized void onSwitchCamera(SwitchCameraEvent event) { if (isResumed() && CheckUtil.nonNull(mProcessorChain, mCameraHelper)) { mProcessorChain.pause(); mCameraHelper.switchCamera(); mProcessorChain.cameraSwitched(); } } @Subscribe(threadMode = ThreadMode.ASYNC) public synchronized void onSwitchFlash(SwitchFlashEvent event) { if (isResumed() && CheckUtil.nonNull(mCameraHelper)) { mCameraHelper.switchFlash(); } } @Subscribe(threadMode = ThreadMode.ASYNC) public synchronized void onSwitchMirror(SwitchMirrorEvent event) { if (isResumed() && CheckUtil.nonNull(mProcessorChain)) { mProcessorChain.switchMirror(); } } }