1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.camera.processing.imagebackend; 18 19 import android.graphics.Rect; 20 21 import com.android.camera.processing.memory.LruResourcePool; 22 import com.android.camera.session.CaptureSession; 23 import com.android.camera.util.Size; 24 25 import java.nio.ByteBuffer; 26 import java.util.concurrent.Executor; 27 28 /** 29 * Implements the conversion of a YUV_420_888 image to subsampled image 30 * inscribed in a circle. 31 */ 32 public class TaskPreviewChainedJpeg extends TaskConvertImageToRGBPreview { 33 private final LruResourcePool<Integer, ByteBuffer> mByteBufferDirectPool; 34 35 /** 36 * Constructor 37 * 38 * @param image Image that the computation is dependent on 39 * @param executor Executor to fire off an events 40 * @param imageTaskManager Image task manager that allows reference counting 41 * and task spawning 42 * @param captureSession Capture session that bound to this image 43 * @param targetSize Approximate viewable pixel demensions of the desired 44 * preview Image */ TaskPreviewChainedJpeg(ImageToProcess image, Executor executor, ImageTaskManager imageTaskManager, CaptureSession captureSession, Size targetSize, LruResourcePool<Integer, ByteBuffer> byteBufferResourcePool)45 TaskPreviewChainedJpeg(ImageToProcess image, 46 Executor executor, 47 ImageTaskManager imageTaskManager, 48 CaptureSession captureSession, 49 Size targetSize, 50 LruResourcePool<Integer, ByteBuffer> byteBufferResourcePool) { 51 super(image, executor, imageTaskManager, ProcessingPriority.AVERAGE, captureSession, 52 targetSize , ThumbnailShape.MAINTAIN_ASPECT_NO_INSET); 53 mByteBufferDirectPool = byteBufferResourcePool; 54 } 55 logWrapper(String message)56 public void logWrapper(String message) { 57 // final Log.Tag TAG = new Log.Tag("TaskPreviewChainedJpeg"); 58 // Log.v(TAG, message); 59 } 60 61 @Override run()62 public void run() { 63 ImageToProcess img = mImage; 64 Rect safeCrop = guaranteedSafeCrop(img.proxy, img.crop); 65 66 final TaskImage inputImage = calculateInputImage(img, safeCrop); 67 final int subsample = calculateBestSubsampleFactor( 68 new Size(safeCrop.width(), safeCrop.height()), 69 mTargetSize); 70 final TaskImage resultImage = calculateResultImage(img, subsample); 71 final int[] convertedImage; 72 73 try { 74 onStart(mId, inputImage, resultImage, TaskInfo.Destination.INTERMEDIATE_THUMBNAIL); 75 76 logWrapper("TIMER_END Rendering preview YUV buffer available, w=" + img.proxy.getWidth() 77 / subsample + " h=" + img.proxy.getHeight() / subsample + " of subsample " 78 + subsample); 79 80 convertedImage = runSelectedConversion(img.proxy, safeCrop, subsample); 81 82 // Chain JPEG task 83 TaskImageContainer jpegTask = new TaskCompressImageToJpeg(img, mExecutor, 84 mImageTaskManager, mSession, mByteBufferDirectPool); 85 mImageTaskManager.appendTasks(img, jpegTask); 86 } finally { 87 // Signal backend that reference has been released 88 mImageTaskManager.releaseSemaphoreReference(img, mExecutor); 89 } 90 91 onPreviewDone(resultImage, inputImage, convertedImage, 92 TaskInfo.Destination.INTERMEDIATE_THUMBNAIL); 93 } 94 95 96 } 97