Merge "Camera: Support 60fps during constrained HFR."

import android.os.Handler;

import android.os.ConditionVariable;

import android.util.Range;

import android.util.Log;

import android.view.Surface;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.Collections;

import java.util.Iterator;

    private final CameraCharacteristics mCharacteristics;

    private final CameraCaptureSessionImpl mSessionImpl;

    private final ConditionVariable mInitialized = new ConditionVariable();

    private final String TAG = "CameraConstrainedHighSpeedCaptureSessionImpl";

    /**

     * Create a new CameraCaptureSession.

        StreamConfigurationMap config = mCharacteristics.get(ck);

        SurfaceUtils.checkConstrainedHighSpeedSurfaces(outputSurfaces, fpsRange, config);

        // Request list size: to limit the preview to 30fps, need use maxFps/30; to maximize

        // the preview frame rate, should use maxBatch size for that high speed stream

        // configuration. We choose the former for now.

        int requestListSize = fpsRange.getUpper() / 30;

        // Check the high speed video fps ranges for video size and find the min value from the list

        // and assign it to previewFps which will be used to calculate the requestList size.

        Range<Integer>[] highSpeedFpsRanges = config.getHighSpeedVideoFpsRangesFor(

                SurfaceUtils.getSurfaceSize(outputSurfaces.iterator().next()));

        Log.v(TAG, "High speed fps ranges: " + Arrays.toString(highSpeedFpsRanges));

        int previewFps = Integer.MAX_VALUE;

        for (Range<Integer> range : highSpeedFpsRanges) {

            int rangeMin = range.getLower();

            if (previewFps > rangeMin) {

                previewFps = rangeMin;

            }

        }

        // Since we only want to support 60fps apart from 30fps, if the min value is not 60,

        // then continue to calculate the requestList size using value 30.

        if (previewFps != 60 && previewFps != 30) {

            Log.w(TAG, "previewFps is neither 60 nor 30.");

            previewFps = 30;

        }

        Log.v(TAG, "previewFps: " + previewFps);

        int requestListSize = fpsRange.getUpper() / previewFps;

        // If it's a preview, keep requestList size fixed = 1.

        if (fpsRange.getUpper() > fpsRange.getLower()) {

            requestListSize = 1;

        }

        Log.v(TAG, "Request list size is: " + requestListSize);

        List<CaptureRequest> requestList = new ArrayList<CaptureRequest>();

        // Prepare the Request builders: need carry over the request controls.