qcom/fmradio/FmConfig.java

/*
 * Copyright (c) 2009-2011, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *    * Neither the name of The Linux Foundation nor
 *      the names of its contributors may be used to endorse or promote
 *      products derived from this software without specific prior written
 *      permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package qcom.fmradio;

import android.util.Log;
import android.os.SystemProperties;


/**
 *
 * Class to be used when changing radio settings
 * @hide
 */
public class FmConfig {

    /* V4l2 Controls */
     private static final int V4L2_CID_PRIVATE_BASE                   = 0x8000000;
     private static final int V4L2_CID_PRIVATE_TAVARUA_REGION         = V4L2_CID_PRIVATE_BASE + 7;
     private static final int V4L2_CID_PRIVATE_TAVARUA_EMPHASIS       = V4L2_CID_PRIVATE_BASE + 12;
     private static final int V4L2_CID_PRIVATE_TAVARUA_RDS_STD        = V4L2_CID_PRIVATE_BASE + 13;
     private static final int V4L2_CID_PRIVATE_TAVARUA_SPACING        = V4L2_CID_PRIVATE_BASE + 14;
     private static final int V4L2_CID_PRIVATE_TAVARUA_SRCH_ALGORITHM = V4L2_CID_PRIVATE_BASE + 0x2B;

     private static final String TAG = "FmConfig";



    private int mRadioBand;
    /**
     * FM pre-emphasis/de-emphasis
     *
     * Possible Values:
     *
     * FmTransceiver.FM_DE_EMP75,
     * FmTransceiver.FM_DE_EMP50
     */
    private int mEmphasis;
    /**
     * Channel spacing
     *
     * Possible Values:
     *
     * FmTransceiver.FM_CHSPACE_200_KHZ,
     * FmTransceiver.FM_CHSPACE_100_KHZ,
     * FmTransceiver.FM_CHSPACE_50_KHZ
     */
    private int mChSpacing;
    /**
     * RDS standard type
     *
     * Possible Values:
     *
     * FmTransceiver.FM_RDS_STD_RBDS,
     * FmTransceiver.FM_RDS_STD_RDS,
     * FmTransceiver.FM_RDS_STD_NONE
     */
    private int mRdsStd;

    /**
     * FM Frequency Band Lower Limit in KHz
     */
    private int mBandLowerLimit;
    /**
     * FM Frequency Band Upper Limit in KHz
     */
    private int mBandUpperLimit;

    public int getRadioBand(){
        return mRadioBand;
    }

    public void setRadioBand (int band){
        mRadioBand = band;
    }

    public int getEmphasis(){
        return mEmphasis;
    }

    public void setEmphasis (int emp){
        mEmphasis = emp;
    }

    public int getChSpacing (){
        return mChSpacing;
    }

    public void setChSpacing(int spacing) {
        mChSpacing = spacing;
    }

    public int getRdsStd () {
        return mRdsStd;
    }

    public void setRdsStd (int rdsStandard) {
        mRdsStd = rdsStandard;
    }

    public int getLowerLimit(){
        return mBandLowerLimit;
    }

    public void setLowerLimit(int lowLimit){
        mBandLowerLimit = lowLimit;
    }

    public int getUpperLimit(){
        return mBandUpperLimit;
    }

    public void setUpperLimit(int upLimit){
        mBandUpperLimit = upLimit;
    }

    /*
     * fmConfigure()
     * This method call v4l2 private controls to set regional settings for the
     * FM core
     */
    protected static boolean fmConfigure (final int fd, final FmConfig configSettings) {

        int re;

        Log.v (TAG, "In fmConfigure");
	re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_EMPHASIS, configSettings.getEmphasis());
        re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_RDS_STD, configSettings.getRdsStd() );
        re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_SPACING, configSettings.getChSpacing() );

        boolean fmSrchAlg = SystemProperties.getBoolean("persist.fm.new.srch.algorithm",false);
        if (fmSrchAlg) {
          Log.v (TAG, "fmConfigure() : FM Srch Alg : NEW ");
          re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_SRCH_ALGORITHM, 1);
        }
        else {
          Log.v (TAG, "fmConfigure() : FM Srch Alg : OLD ");
          re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_SRCH_ALGORITHM, 0);
        }
        if (re < 0)
          return false;

        re = FmReceiverJNI.setBandNative (fd, configSettings.getLowerLimit(), configSettings.getUpperLimit());
        if (re < 0)
          return false;

        re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_REGION, configSettings.mRadioBand);
        /* setControlNative for V4L2_CID_PRIVATE_TAVARUA_REGION triggers the config change*/
        if (re < 0)
          return false;

        return true;
    }

}