| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.camera.one.v2.initialization; |
| |
| import android.view.Surface; |
| |
| import com.android.camera.one.OneCamera; |
| import com.android.camera.one.v2.camera2proxy.CameraCaptureSessionProxy; |
| import com.android.camera.util.ApiHelper; |
| import com.google.common.util.concurrent.AsyncFunction; |
| import com.google.common.util.concurrent.Futures; |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * When the preview surface is available, creates a capture session, and then |
| * notifies the listener when the session is available. |
| */ |
| class PreviewStarter { |
| public interface CameraCaptureSessionCreatedListener { |
| public void onCameraCaptureSessionCreated(CameraCaptureSessionProxy session, Surface |
| previewSurface); |
| } |
| |
| private final List<Surface> mOutputSurfaces; |
| private final CaptureSessionCreator mCaptureSessionCreator; |
| private final CameraCaptureSessionCreatedListener mSessionListener; |
| |
| /** |
| * @param outputSurfaces The set of output surfaces (except for the preview |
| * surface) to use. |
| * @param captureSessionCreator |
| * @param sessionListener A callback to be invoked when the capture session |
| * has been created. It is executed on threadPoolExecutor. |
| */ |
| public PreviewStarter(List<Surface> outputSurfaces, |
| CaptureSessionCreator captureSessionCreator, |
| CameraCaptureSessionCreatedListener sessionListener) { |
| mOutputSurfaces = outputSurfaces; |
| mCaptureSessionCreator = captureSessionCreator; |
| mSessionListener = sessionListener; |
| } |
| |
| /** |
| * See {@link OneCamera#startPreview}. |
| * |
| * @param surface The preview surface to use. |
| */ |
| public ListenableFuture<Void> startPreview(final Surface surface) { |
| // When we have the preview surface, start the capture session. |
| List<Surface> surfaceList = new ArrayList<>(); |
| |
| // Workaround of the face detection failure on Nexus 5 and L. (b/21039466) |
| // Need to create a capture session with the single preview stream first |
| // to lock it as the first stream. Then resend the another session with preview |
| // and JPEG stream. |
| if (ApiHelper.isLorLMr1() && ApiHelper.IS_NEXUS_5) { |
| surfaceList.add(surface); |
| mCaptureSessionCreator.createCaptureSession(surfaceList); |
| surfaceList.addAll(mOutputSurfaces); |
| } else { |
| surfaceList.addAll(mOutputSurfaces); |
| surfaceList.add(surface); |
| } |
| |
| final ListenableFuture<CameraCaptureSessionProxy> sessionFuture = |
| mCaptureSessionCreator.createCaptureSession(surfaceList); |
| |
| return Futures.transform(sessionFuture, |
| new AsyncFunction<CameraCaptureSessionProxy, Void>() { |
| @Override |
| public ListenableFuture<Void> apply( |
| CameraCaptureSessionProxy captureSession) throws Exception { |
| mSessionListener.onCameraCaptureSessionCreated(captureSession, surface); |
| return Futures.immediateFuture(null); |
| } |
| }); |
| } |
| } |