/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.camera.processing.imagebackend;
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import android.graphics.Rect;
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import com.android.camera.processing.memory.LruResourcePool;
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import com.android.camera.session.CaptureSession;
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import com.android.camera.util.Size;
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import java.nio.ByteBuffer;
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import java.util.concurrent.Executor;
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/**
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* Implements the conversion of a YUV_420_888 image to subsampled image
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* inscribed in a circle.
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*/
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public class TaskPreviewChainedJpeg extends TaskConvertImageToRGBPreview {
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private final LruResourcePool<Integer, ByteBuffer> mByteBufferDirectPool;
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/**
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* Constructor
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*
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* @param image Image that the computation is dependent on
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* @param executor Executor to fire off an events
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* @param imageTaskManager Image task manager that allows reference counting
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* and task spawning
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* @param captureSession Capture session that bound to this image
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* @param targetSize Approximate viewable pixel demensions of the desired
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* preview Image */
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TaskPreviewChainedJpeg(ImageToProcess image,
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Executor executor,
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ImageTaskManager imageTaskManager,
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CaptureSession captureSession,
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Size targetSize,
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LruResourcePool<Integer, ByteBuffer> byteBufferResourcePool) {
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super(image, executor, imageTaskManager, ProcessingPriority.AVERAGE, captureSession,
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targetSize , ThumbnailShape.MAINTAIN_ASPECT_NO_INSET);
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mByteBufferDirectPool = byteBufferResourcePool;
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}
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public void logWrapper(String message) {
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// final Log.Tag TAG = new Log.Tag("TaskPreviewChainedJpeg");
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// Log.v(TAG, message);
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}
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@Override
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public void run() {
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ImageToProcess img = mImage;
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Rect safeCrop = guaranteedSafeCrop(img.proxy, img.crop);
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final TaskImage inputImage = calculateInputImage(img, safeCrop);
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final int subsample = calculateBestSubsampleFactor(
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new Size(safeCrop.width(), safeCrop.height()),
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mTargetSize);
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final TaskImage resultImage = calculateResultImage(img, subsample);
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final int[] convertedImage;
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try {
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onStart(mId, inputImage, resultImage, TaskInfo.Destination.INTERMEDIATE_THUMBNAIL);
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logWrapper("TIMER_END Rendering preview YUV buffer available, w=" + img.proxy.getWidth()
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/ subsample + " h=" + img.proxy.getHeight() / subsample + " of subsample "
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+ subsample);
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convertedImage = runSelectedConversion(img.proxy, safeCrop, subsample);
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// Chain JPEG task
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TaskImageContainer jpegTask = new TaskCompressImageToJpeg(img, mExecutor,
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mImageTaskManager, mSession, mByteBufferDirectPool);
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mImageTaskManager.appendTasks(img, jpegTask);
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} finally {
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// Signal backend that reference has been released
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mImageTaskManager.releaseSemaphoreReference(img, mExecutor);
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}
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onPreviewDone(resultImage, inputImage, convertedImage,
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TaskInfo.Destination.INTERMEDIATE_THUMBNAIL);
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}
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}
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