lib/driver/audiodynamic.cpp

   1 #include <lib/base/ebase.h>
   2 #include <lib/base/eerror.h>
   3 #include <lib/system/init.h>
   4 #include <lib/system/init_num.h>
   5 #include <lib/driver/eavswitch.h>
   6 #include <lib/driver/audiodynamic.h>
   7 #include <lib/system/econfig.h>
   8 #include <unistd.h>
   9 #include <fcntl.h>
  10 #include <sys/ioctl.h>
  11 #include <math.h>
  12
  13 int eAudioDynamicCompression::read_rms(int i)
  14 {
  15         struct arg_s arg;
  16         arg.num = i;
  17         arg.clear = 1;
  18         if (ioctl(fd, 0, &arg))
  19                 return -1;
  20         return (int)(sqrt(arg.dst / arg.dst_n) * 100000 / (17794890));
  21 }
  22
  23 void eAudioDynamicCompression::doPoll()
  24 {
  25         int sum = read_rms(0) + read_rms(1) + read_rms(4) + read_rms(5);
  26         last_val[last_ptr++] = sum;
  27         if (last_ptr == 100)
  28                 last_ptr = 0;
  29
  30         int result = 0;
  31
  32         current_value = sum;
  33
  34         current_fast = current_value;
  35
  36         int i, maxval=0;
  37         for (i=0; i<100; ++i)
  38                 if (last_val[i] > maxval)
  39                         maxval = last_val[i];
  40
  41         current_value = current_fast;
  42
  43         if (maxval < hyst_low)
  44         {
  45                 result = +1;
  46         } else if (current_fast > hyst_hi * 2)
  47         {
  48                 result = -4;
  49         } else if (current_fast > hyst_hi)
  50         {
  51                 result = -1;
  52         }
  53
  54 //      eDebug("%d, %d (%d %d) %d %d", sum, result, hyst_low, hyst_hi, maxval, current_fast);
  55         eAVSwitch *avsw=eAVSwitch::getInstance();
  56         if (avsw && result && enabled && !avsw->getMute())
  57                 avsw->changeVolume(0, -result);
  58 }
  59
  60 eAudioDynamicCompression *eAudioDynamicCompression::instance;
  61
  62 eAudioDynamicCompression::eAudioDynamicCompression(): pollTimer(eApp)
  63 {
  64         fd = ::open("/dev/audio", O_RDWR);
  65         if (fd < 0)
  66         {
  67                 eWarning("can't open /dev/audio (%m) - disabling audio dynamic compression support.");
  68                 return;
  69         }
  70
  71 //      CONNECT(pollTimer.timeout, eAudioDynamicCompression::doPoll);
  72
  73         enabled = 0;
  74         eConfig::getInstance()->getKey("/elitedvb/audio/dynamicadjust", enabled);
  75         int val = 8000;;
  76         eConfig::getInstance()->getKey("/ezap/audio/dynamicadjust_value", val);
  77         setMax(val);
  78         setEnable(enabled);
  79
  80         current_value = 0;
  81         instance = this;
  82
  83         for (int i=0; i<100; ++i)
  84                 last_val[i] = 0;
  85         last_ptr = 0;
  86 }
  87
  88 void eAudioDynamicCompression::setEnable(int enable)
  89 {
  90         enabled = enable;
  91         if (enabled)
  92                 pollTimer.start(100, 0);
  93         else
  94                 pollTimer.stop();
  95 }
  96
  97 eAudioDynamicCompression::~eAudioDynamicCompression()
  98 {
  99         if (fd >= 0)
 100                 ::close(fd);
 101         instance = 0;
 102         eConfig::getInstance()->setKey("/elitedvb/audio/dynamicadjust", enabled);
 103         eConfig::getInstance()->setKey("/ezap/audio/dynamicadjust_value", hyst_hi);
 104 }
 105
 106 eAutoInitP0<eAudioDynamicCompression> init_eAudioDynamicCompression(eAutoInitNumbers::dvb, "eAudioDynamicCompression");