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
17package com.android.camera.processing.imagebackend;
18
19import android.graphics.ImageFormat;
20
21import android.graphics.Rect;
22import com.android.camera.debug.Log;
23import com.android.camera.one.v2.camera2proxy.ImageProxy;
24import com.android.camera.session.CaptureSession;
25
26import java.util.List;
27import java.util.concurrent.Executor;
28
29/**
30 * Implements the conversion of a YUV_420_888 image to compressed JPEG byte
31 * array, as two separate tasks: the first to copy from the image to NV21 memory
32 * layout, and the second to convert the image into JPEG, using the built-in
33 * Android compressor.
34 *
35 * TODO: Implement cropping, if required.
36 */
37class TaskChainedCompressImageToJpeg extends TaskJpegEncode {
38    private final static Log.Tag TAG = new Log.Tag("TaskChainJpg");
39
40    TaskChainedCompressImageToJpeg(ImageToProcess image, Executor executor,
41            ImageTaskManager imageTaskManager, CaptureSession captureSession) {
42        super(image, executor, imageTaskManager, ProcessingPriority.SLOW, captureSession);
43    }
44
45    private void logWrapper(String message) {
46        // Do nothing.
47    }
48
49    @Override
50    public void run() {
51        ImageToProcess img = mImage;
52        Rect safeCrop = guaranteedSafeCrop(img.proxy, img.crop);
53        final List<ImageProxy.Plane> planeList = img.proxy.getPlanes();
54
55        final TaskImage inputImage = new TaskImage(mImage.rotation, img.proxy.getWidth(),
56                img.proxy.getHeight(), img.proxy.getFormat(), safeCrop);
57        final TaskImage resultImage = new TaskImage(mImage.rotation, img.proxy.getWidth(),
58                img.proxy.getHeight(), ImageFormat.JPEG , safeCrop);
59        byte[] dataCopy;
60        int[] strides = new int[3];
61
62        try {
63            onStart(mId, inputImage, resultImage, TaskInfo.Destination.FINAL_IMAGE);
64
65            // Do the byte copy
66            strides[0] = planeList.get(0).getRowStride()
67                    / planeList.get(0).getPixelStride();
68            strides[1] = planeList.get(1).getRowStride()
69                    / planeList.get(1).getPixelStride();
70            strides[2] = 2 * planeList.get(2).getRowStride()
71                    / planeList.get(2).getPixelStride();
72
73            // TODO: For performance, use a cache subsystem for buffer reuse.
74            dataCopy = convertYUV420ImageToPackedNV21(img.proxy);
75        } finally {
76            // Release the image now that you have a usable copy
77            mImageTaskManager.releaseSemaphoreReference(img, mExecutor);
78        }
79
80        final byte[] chainedDataCopy = dataCopy;
81        final int[] chainedStrides = strides;
82
83        // This task drops the image reference.
84        TaskImageContainer chainedTask = new TaskJpegEncode(this, ProcessingPriority.SLOW) {
85
86            @Override
87            public void run() {
88                // Image is closed by now. Do NOT reference image directly.
89                byte[] compressedData = convertNv21toJpeg(chainedDataCopy,
90                        resultImage.height, resultImage.width, chainedStrides);
91                onJpegEncodeDone(mId, inputImage, resultImage, compressedData,
92                        TaskInfo.Destination.FINAL_IMAGE);
93                logWrapper("Finished off a chained task now that image is released.");
94            }
95        };
96
97        // Passed null, since the image has already been released.
98        mImageTaskManager.appendTasks(null, chainedTask);
99        logWrapper("Kicking off a chained task now that image is released.");
100    }
101}
102