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Paranoia level of audiocd ioslave

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mre

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  • "mre" started this thread

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Monday, October 10th 2005, 9:36pm

Paranoia level of audiocd ioslave

Hello,

has anyone figured out which settings the audiocd ioslave uses for cdparanoia? I try below -- it seems that it uses a quite paranoid setting -- but am I correct? If so, how does that relate to the complaint about kaudiocreator not using cdparanoia in a recent post? Still to investigate: Which error conditions are brought to the user's attention?

It seems that the default for the audiocd ioslave is to use its internal parameter "paranoiaLevel = 2", unless anything is set in the configuration file .kde/share/config/kcmaudiocdrc, or the option paranoia_level is specified in the URL; which then overrides the configuration setting.

Why are these things not documented? :rolleyes:

From audiocd.cpp:

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d->paranoiaLevel = 1; // enable paranoia error correction, but allow skipping

if (config->readBoolEntry("disable_paranoia",false)) {
    d->paranoiaLevel = 0; // disable all paranoia error correction
}

if (config->readBoolEntry("never_skip",true)) {
    d->paranoiaLevel = 2;
      // never skip on errors of the medium, should be default for high quality
}


Setting #2 would be full paranoia, which is a good thing in my opinion. (Though the line concerning PARANOIA_MODE_OVERLAP below seems to be a no-op?).

Here is how the setting is applied:

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int paranoiaLevel = PARANOIA_MODE_FULL ^ PARANOIA_MODE_NEVERSKIP;
switch (d->paranoiaLevel)
{
  case 0:
      paranoiaLevel = PARANOIA_MODE_DISABLE;
      break;
  case 1:
      paranoiaLevel |= PARANOIA_MODE_OVERLAP;
      paranoiaLevel &= ~PARANOIA_MODE_VERIFY;
      break;
  case 2:
      paranoiaLevel |= PARANOIA_MODE_NEVERSKIP;
  default:
      break;
}


And from cdda_paranoia.h:

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#define PARANOIA_MODE_FULL        0xff
#define PARANOIA_MODE_DISABLE     0

#define PARANOIA_MODE_VERIFY      1
#define PARANOIA_MODE_FRAGMENT    2
#define PARANOIA_MODE_OVERLAP     4
#define PARANOIA_MODE_SCRATCH     8
#define PARANOIA_MODE_REPAIR      16
#define PARANOIA_MODE_NEVERSKIP   32