TvhMappings.java

/*
 * Copyright (c) 2017 Kiall Mac Innes <kiall@macinnes.ie>
 *
 * 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 ie.macinnes.tvheadend;

import android.util.Log;

public class TvhMappings {
    private static final String TAG = TvhMappings.class.getName();

    private TvhMappings() {
        throw new IllegalAccessError("Utility class");
    }

    private static final int[] mSampleRates = new int[]{
        96000, 88200, 64000, 48000,
        44100, 32000, 24000, 22050,
        16000, 12000, 11025,  8000,
        7350,     0,     0,     0
    };

    public static int sriToRate(int sri)
    {
        return mSampleRates[sri & 0xf];
    }

    public static int androidSpeedToTvhSpeed(float speed) {
        // Translate the speed value from what Android uses, to what TVHeadend expects.
        // TVHeadend expects: 0=pause, 100=1x fwd, -100=1x backward)

        int translatedSpeed;

        switch((int) speed) {
            case 1: // Normal Playback
                translatedSpeed = 100;
                break;

            case -2: // 2x Rewind
                translatedSpeed = -200;
                break;
            case -4: // 3x Rewind
                translatedSpeed = -300;
                break;
            case -12: // 4x Rewind
                translatedSpeed = -400;
                break;
            case -48: // 5x Rewind
                translatedSpeed = -500;
                break;

            case 2: // 2x Fast forward
                translatedSpeed = 200;
                break;
            case 8: // 3x Fast forward
                translatedSpeed = 300;
                break;
            case 32: // 4x Fast forward
                translatedSpeed = 400;
                break;
            case 128: // 5x Fast forward
                translatedSpeed = 500;
                break;

            default:
                throw new IllegalArgumentException("Unknown speed: " + speed);
        }

        Log.d(TAG, "Translated android speed " + speed + " to TVH speed " + translatedSpeed);
        return translatedSpeed;
    }
}