AndroidFM模块学习之四源码分析（十）

接上一篇，今天我们来看看android\vendor\qcom\opensource\fm\qcom\fmradio\FmRxControls.java

/ *

*打开FM Rx / Tx。

* Rx = 1和Tx = 2

* /

public void fmOn(int fd, int device) {      int re;      FmReceiverJNI.setControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_STATE, device );      setAudioPath(fd, false);      re = FmReceiverJNI.SetCalibrationNative(fd);      if (re != 0)         Log.d(TAG,"Calibration failed");   }

 

/ *

*关掉FM Rx / Tx

* /

public void fmOff(int fd){      FmReceiverJNI.setControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_STATE, 0 );   }

/ *

*设置静音控制

* /

 public void muteControl(int fd, boolean on) {      if (on)      {         int err = FmReceiverJNI.setControlNative(fd, V4L2_CID_AUDIO_MUTE, 3 );      } else      {         int err = FmReceiverJNI.setControlNative(fd, V4L2_CID_AUDIO_MUTE, 0 );      }   }

/ *

*获得干扰通道

* /

public int IovercControl(int fd)   {      int ioverc = FmReceiverJNI.getControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_IOVERC);      Log.d(TAG, "IOVERC value is : "+ioverc);      return ioverc;   }

/ *

*获得IntDet

* /

public int IntDet(int fd)   {      int intdet =  FmReceiverJNI.getControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_INTDET);      Log.d(TAG, "IOVERC value is : "+intdet);      return intdet;   }

/ *

*获得MPX_DCC

* /

public int Mpx_Dcc(int fd)   {      int mpx_dcc =  FmReceiverJNI.getControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_MPX_DCC);      Log.d(TAG, "MPX_DCC value is : " + mpx_dcc);      return mpx_dcc;   }

/ *

*设置Hi-Low注入

* /

 public int setHiLoInj(int fd, int inj)   {      int re =  FmReceiverJNI.setControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_HLSI, inj);      return re;   }

/ *

*set打开通道阈值

* /

public int setOnChannelThreshold(int fd, int sBuff)   {      int re = FmReceiverJNI.setControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_ON_CHANNEL_THRESHOLD, sBuff);      if ( re < 0)         Log.e(TAG, "Failed to set On channel threshold data");      return re;   }

/ *

*set关闭通道阈值

* /

public int setOffChannelThreshold(int fd, int sBuff)   {      int re = FmReceiverJNI.setControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_OFF_CHANNEL_THRESHOLD, sBuff);      if ( re < 0)         Log.e(TAG, "Failed to set Off channel Threshold data");      return re;   }

/ *

*设置音频路径模拟/数字

* /

public int setAudioPath(int fd, boolean value)   {      int mode;      if (value)         mode = FM_ANALOG_PATH;      else         mode = FM_DIGITAL_PATH;      int re =  FmReceiverJNI.setControlNative(fd, V4L2_CID_PRIVATE_TAVARUA_SET_AUDIO_PATH, mode);      return re;   }

/ *

*优化调频核心指定的频率。

* /

public int setStation(int fd) {      Log.d(TAG, "** Tune Using: "+fd);      int ret = FmReceiverJNI.setFreqNative(fd, mFreq);      Log.d(TAG, "** Returned: "+ret);      return ret;   }

/ *

*获取FM频率

* /

 

public int getTunedFrequency(int fd) {
      int frequency = FmReceiverJNI.getFreqNative(fd);
      Log.d(TAG, "getTunedFrequency: "+frequency);
      return frequency;
   }

/ *

*获得SINR的价值

* /

 public int getSINR(int fd)   {      return  FmReceiverJNI.getControlNative(fd, V4L2_CID_PRIVATE_SINR);   }

/ *

*开始自动搜索预设列表

* /

 public int searchStationList (int fd, int mode, int preset_num,                                   int dir, int pty )   {      int re;     /* set search mode. */      re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_SRCHMODE, mode);      if (re != 0) {         return re;      }      /* set number of stations to be returned in the list */re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_SRCH_CNT, preset_num);      if (re != 0) {         return re;      }      // RDS search list?      if (pty > 0 ){        re = FmReceiverJNI.setControlNative (fd, V4L2_CID_PRIVATE_TAVARUA_SRCH_PTY, pty);      }      if (re != 0) {         return re;      }      /* This triigers the search and once completed the FM core generates       * searchListComplete event */      re = FmReceiverJNI.startSearchNative (fd, dir );      if (re != 0) {         return re;      }      else {         return 0;      }   }

 

/ *从缓冲区读取搜索列表* /

public int[] stationList (int fd)   {         int freq = 0;         int i=0, j = 0;         int station_num = 0;         float real_freq = 0;         int [] stationList;         byte [] sList = new byte[100];         int tmpFreqByte1=0;         int tmpFreqByte2=0;         float lowBand, highBand;         lowBand  = (float) (FmReceiverJNI.getLowerBandNative(fd) / 1000.00);         highBand = (float) (FmReceiverJNI.getUpperBandNative(fd) / 1000.00);         Log.d(TAG, "lowBand: " + lowBand);         Log.d(TAG, "highBand: " + highBand);         FmReceiverJNI.getBufferNative(fd, sList, 0);         if ((int)sList[0] >0) {            station_num = (int)sList[0];         }         stationList = new int[station_num+1];Log.d(TAG, "station_num: " + station_num);         for (i=0;i<station_num;i++) {            freq = 0;            Log.d(TAG, " Byte1 = " + sList[i*2+1]);            Log.d(TAG, " Byte2 = " + sList[i*2+2]);            tmpFreqByte1 = sList[i*2+1] & 0xFF;            tmpFreqByte2 = sList[i*2+2] & 0xFF;            Log.d(TAG, " tmpFreqByte1 = " + tmpFreqByte1);            Log.d(TAG, " tmpFreqByte2 = " + tmpFreqByte2);            freq = (tmpFreqByte1 & 0x03) << 8;            freq |= tmpFreqByte2;            Log.d(TAG, " freq: " + freq);real_freq  = (float)(freq * 50) + (lowBand * FREQ_MUL);//tuner.rangelow * FREQ_MUL;            Log.d(TAG, " real_freq: " + real_freq);            if ( (real_freq < (lowBand * FREQ_MUL)) || (real_freq > (highBand * FREQ_MUL)) ) {               Log.e(TAG, "Frequency out of band limits");            }            else {               stationList[j] = (int)(real_freq);               Log.d(TAG, " stationList: " + stationList[j]);               j++;            }         } try {          // mark end of list           stationList[station_num] = 0;        }        catch (ArrayIndexOutOfBoundsException e) {           Log.d(TAG, "ArrayIndexOutOfBoundsException !!");        }        return stationList;   }