/*
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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.ImageFormat;
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import android.graphics.Rect;
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import com.android.camera.debug.Log;
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import com.android.camera.one.v2.camera2proxy.ImageProxy;
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import com.android.camera.session.CaptureSession;
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import java.util.List;
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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 compressed JPEG byte
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* array, as two separate tasks: the first to copy from the image to NV21 memory
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* layout, and the second to convert the image into JPEG, using the built-in
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* Android compressor.
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*
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* TODO: Implement cropping, if required.
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*/
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class TaskChainedCompressImageToJpeg extends TaskJpegEncode {
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private final static Log.Tag TAG = new Log.Tag("TaskChainJpg");
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TaskChainedCompressImageToJpeg(ImageToProcess image, Executor executor,
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ImageTaskManager imageTaskManager, CaptureSession captureSession) {
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super(image, executor, imageTaskManager, ProcessingPriority.SLOW, captureSession);
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}
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private void logWrapper(String message) {
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// Do nothing.
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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 List<ImageProxy.Plane> planeList = img.proxy.getPlanes();
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final TaskImage inputImage = new TaskImage(mImage.rotation, img.proxy.getWidth(),
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img.proxy.getHeight(), img.proxy.getFormat(), safeCrop);
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final TaskImage resultImage = new TaskImage(mImage.rotation, img.proxy.getWidth(),
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img.proxy.getHeight(), ImageFormat.JPEG , safeCrop);
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byte[] dataCopy;
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int[] strides = new int[3];
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try {
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onStart(mId, inputImage, resultImage, TaskInfo.Destination.FINAL_IMAGE);
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// Do the byte copy
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strides[0] = planeList.get(0).getRowStride()
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/ planeList.get(0).getPixelStride();
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strides[1] = planeList.get(1).getRowStride()
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/ planeList.get(1).getPixelStride();
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strides[2] = 2 * planeList.get(2).getRowStride()
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/ planeList.get(2).getPixelStride();
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// TODO: For performance, use a cache subsystem for buffer reuse.
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dataCopy = convertYUV420ImageToPackedNV21(img.proxy);
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} finally {
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// Release the image now that you have a usable copy
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mImageTaskManager.releaseSemaphoreReference(img, mExecutor);
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}
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final byte[] chainedDataCopy = dataCopy;
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final int[] chainedStrides = strides;
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// This task drops the image reference.
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TaskImageContainer chainedTask = new TaskJpegEncode(this, ProcessingPriority.SLOW) {
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@Override
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public void run() {
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// Image is closed by now. Do NOT reference image directly.
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byte[] compressedData = convertNv21toJpeg(chainedDataCopy,
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resultImage.height, resultImage.width, chainedStrides);
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onJpegEncodeDone(mId, inputImage, resultImage, compressedData,
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TaskInfo.Destination.FINAL_IMAGE);
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logWrapper("Finished off a chained task now that image is released.");
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}
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};
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// Passed null, since the image has already been released.
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mImageTaskManager.appendTasks(null, chainedTask);
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logWrapper("Kicking off a chained task now that image is released.");
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}
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}
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