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Commit a0496d34 authored by Igor Murashkin's avatar Igor Murashkin
Browse files

camera2-legacy: Workaround max jpeg/preview size AR mismatch 

Filter out the largest preview sizes (from the stream configuration map)
until we find one whose aspect ratio matches the max jpeg aspect ratio.
Keep all other (smaller) preview sizes.

Bug: 17589233
Change-Id: I8ebcaef6439691eff3312da2c37b9abe08a067ad
parent f9ba548f

core/java/android/hardware/camera2/legacy/LegacyMetadataMapper.java

+63 −3
Original line number Diff line number Diff line
@@ -34,7 +34,6 @@ import android.hardware.camera2.params.StreamConfigurationDuration; 
import android.hardware.camera2.utils.ArrayUtils;

import android.hardware.camera2.utils.ListUtils;

import android.hardware.camera2.utils.ParamsUtils;

import android.hardware.camera2.utils.SizeAreaComparator;

import android.util.Log;

import android.util.Range;

import android.util.Size;
@@ -88,6 +87,9 @@ public class LegacyMetadataMapper { 


    static final int UNKNOWN_MODE = -1;



    // Maximum difference between a preview size aspect ratio and a jpeg size aspect ratio

    private static final float PREVIEW_ASPECT_RATIO_TOLERANCE = 0.01f;



    /*

     * Development hijinks: Lie about not supporting certain capabilities

     *
@@ -103,6 +105,7 @@ public class LegacyMetadataMapper { 
    static final boolean LIE_ABOUT_AWB_STATE = false;

    static final boolean LIE_ABOUT_AWB = false;





    /**

     * Create characteristics for a legacy device by mapping the {@code parameters}

     * and {@code info}
@@ -262,6 +265,64 @@ public class LegacyMetadataMapper { 
         * remapping to public format constants.

         */

        List<Camera.Size> previewSizes = p.getSupportedPreviewSizes();

        List<Camera.Size> jpegSizes = p.getSupportedPictureSizes();

        /*

         * Work-around for b/17589233:

         * - Some HALs's largest preview size aspect ratio does not match the largest JPEG size AR

         * - This causes a large amount of problems with focus/metering because it's relative to

         *   preview, making the difference between the JPEG and preview viewport inaccessible

         * - This boils down to metering or focusing areas being "arbitrarily" cropped

         *   in the capture result.

         * - Work-around the HAL limitations by removing all of the largest preview sizes

         *   until we get one with the same aspect ratio as the jpeg size.

         */

        {

            SizeAreaComparator areaComparator = new SizeAreaComparator();



            // Sort preview to min->max

            Collections.sort(previewSizes, areaComparator);



            Camera.Size maxJpegSize = SizeAreaComparator.findLargestByArea(jpegSizes);

            float jpegAspectRatio = maxJpegSize.width * 1.0f / maxJpegSize.height;



            if (VERBOSE) {

                Log.v(TAG, String.format("mapScalerStreamConfigs - largest JPEG area %dx%d, AR=%f",

                        maxJpegSize.width, maxJpegSize.height, jpegAspectRatio));

            }



            // Now remove preview sizes from the end (largest->smallest) until aspect ratio matches

            while (!previewSizes.isEmpty()) {

                int index = previewSizes.size() - 1; // max is always at the end

                Camera.Size size = previewSizes.get(index);



                float previewAspectRatio = size.width * 1.0f / size.height;



                if (Math.abs(jpegAspectRatio - previewAspectRatio) >=

                        PREVIEW_ASPECT_RATIO_TOLERANCE) {

                    previewSizes.remove(index); // Assume removing from end is O(1)



                    if (VERBOSE) {

                        Log.v(TAG, String.format(

                                "mapScalerStreamConfigs - removed preview size %dx%d, AR=%f "

                                        + "was not the same",

                                size.width, size.height, previewAspectRatio));

                    }

                } else {

                    break;

                }

            }



            if (previewSizes.isEmpty()) {

                // Fall-back to the original faulty behavior, but at least work

                Log.w(TAG, "mapScalerStreamConfigs - failed to find any preview size matching " +

                        "JPEG aspect ratio " + jpegAspectRatio);

                previewSizes = p.getSupportedPreviewSizes();

            }



            // Sort again, this time in descending order max->min

            Collections.sort(previewSizes, Collections.reverseOrder(areaComparator));

        }



        appendStreamConfig(availableStreamConfigs,

                HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, previewSizes);

        appendStreamConfig(availableStreamConfigs,
@@ -279,7 +340,6 @@ public class LegacyMetadataMapper { 
            }

        }



        List<Camera.Size> jpegSizes = p.getSupportedPictureSizes();

        appendStreamConfig(availableStreamConfigs,

                HAL_PIXEL_FORMAT_BLOB, p.getSupportedPictureSizes());

        /*
@@ -620,7 +680,7 @@ public class LegacyMetadataMapper { 


        if (thumbnailSizes != null) {

            Size[] sizes = convertSizeListToArray(thumbnailSizes);

            Arrays.sort(sizes, new SizeAreaComparator());

            Arrays.sort(sizes, new android.hardware.camera2.utils.SizeAreaComparator());

            m.set(JPEG_AVAILABLE_THUMBNAIL_SIZES, sizes);

        }

    }

core/java/android/hardware/camera2/legacy/SizeAreaComparator.java

0 → 100644
+72 −0
Original line number Diff line number Diff line 
/*

 * 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 android.hardware.camera2.legacy;



import android.hardware.Camera;



import java.util.Collections;

import java.util.Comparator;

import java.util.List;



import static com.android.internal.util.Preconditions.*;



/**

 * Comparator for api1 {@link Camera.Size} objects by the area.

 *

 * <p>This comparator totally orders by rectangle area. Tie-breaks on width.</p>

 */

@SuppressWarnings("deprecation")

public class SizeAreaComparator implements Comparator<Camera.Size> {

    /**

     * {@inheritDoc}

     */

    @Override

    public int compare(Camera.Size size, Camera.Size size2) {

        checkNotNull(size, "size must not be null");

        checkNotNull(size2, "size2 must not be null");



        if (size.equals(size2)) {

            return 0;

        }



        long width = size.width;

        long width2 = size2.width;

        long area = width * size.height;

        long area2 = width2 * size2.height;



        if (area == area2) {

            return (width > width2) ? 1 : -1;

        }



        return (area > area2) ? 1 : -1;

    }



    /**

     * Get the largest api1 {@code Camera.Size} from the list by comparing each size's area

     * by each other using {@link SizeAreaComparator}.

     *

     * @param sizes a non-{@code null} list of non-{@code null} sizes

     * @return a non-{@code null} size

     *

     * @throws NullPointerException if {@code sizes} or any elements in it were {@code null}

     */

    public static Camera.Size findLargestByArea(List<Camera.Size> sizes) {

        checkNotNull(sizes, "sizes must not be null");



        return Collections.max(sizes, new SizeAreaComparator());

    }

}