Re: [Libcdio-devel] Re: New MMC functions to detect media type

[Frank Endres]

Hi Thomas !

Thank a lot for your explanation. I didn't know the distinction between
rewritable with / without blanking for DVDs (and BDs). I know HD-DVDs are
dead (I just followed MMC-5 spec), and I first didn't write code for them,
but is it really impossible to meet some ? In that case, just wipe out the
unneeded code. You are right, I don't know where I can bye a dual layer
DVD+RW (0x2A), should I wipe the code for them too ?

This is a new proposition:

typedef enum {
  MMC_DISCTYPE_NO_DISC,

  MMC_DISCTYPE_CD_ROM,
  MMC_DISCTYPE_CD_R,
  MMC_DISCTYPE_CD_RW,

  MMC_DISCTYPE_DVD_ROM,
  MMC_DISCTYPE_DVD_RAM,
  MMC_DISCTYPE_DVD_R, //DVD-R
  MMC_DISCTYPE_DVD_RW_RO, //DVD-RW Restricted Overwrite
  MMC_DISCTYPE_DVD_RW_SR, //DVD-RW Sequential Recording
  MMC_DISCTYPE_DVD_R_DL_SR, //DVD-R Dual Layer Sequential Recording
  MMC_DISCTYPE_DVD_R_DL_JR, //DVD-R Dual Layer Jump Recording
  MMC_DISCTYPE_DVD_PRW, //DVD+RW
  MMC_DISCTYPE_DVD_PR, //DVD+R
  MMC_DISCTYPE_DVD_PRW_DL, //DVD+RW Dual Layer
  MMC_DISCTYPE_DVD_PR_DL, //DVD+R Dual Layer

  MMC_DISCTYPE_BD_ROM,
  MMC_DISCTYPE_BD_R_SR, //Sequential Recording
  MMC_DISCTYPE_BD_R_RR, //Random Recording
  MMC_DISCTYPE_BD_RE,

  MMC_DISCTYPE_HD_DVD_ROM,
  MMC_DISCTYPE_HD_DVD_R,
  MMC_DISCTYPE_HD_DVD_RAM
} disctype_t;


/**
  Detects the disc type using the SCSI-MMC GET CONFIGURATION command.

  @param p_cdio the CD object to be acted upon.

  @param opt_i_status, if not NULL, on return will be set indicate whether
  the operation was a success (DRIVER_OP_SUCCESS) or if not to some
  other value.

  @return the disc type.
 */
disctype_t
mmc_get_disctype (const CdIo_t *p_cdio,
      driver_return_code_t *opt_i_status) {

  uint8_t buf[500] = { 0, };
  mmc_cdb_t cdb = {{0, }};
  driver_return_code_t i_status;
  uint8_t *p, *q;
  uint8_t profiles_list_length;
  uint16_t profile_number;
  bool profile_active;
  disctype_t disctype;

  CDIO_MMC_SET_COMMAND(cdb.field, CDIO_MMC_GPCMD_GET_CONFIGURATION);
  CDIO_MMC_SET_READ_LENGTH8(cdb.field, sizeof(buf));
  cdb.field[1] = CDIO_MMC_GET_CONF_ALL_FEATURES;
  cdb.field[3] = 0x0;

  i_status = mmc_run_cmd(p_cdio, 0, &cdb, SCSI_MMC_DATA_READ,
        sizeof(buf), &buf);
  if (opt_i_status != NULL) *opt_i_status = i_status;

  if (i_status == DRIVER_OP_SUCCESS) {
    p = buf + 8; //there is always a profile list feature listed at the
first place of the features list
    profiles_list_length = p[3];
    q = p+4;
    disctype = MMC_DISCTYPE_NO_DISC;

    while ((disctype == MMC_DISCTYPE_NO_DISC) && (q < p +
profiles_list_length)) {
      profile_number = CDIO_MMC_GET_LEN16(q);
      profile_active = q[2] & 0x01;

      switch (profile_number) {
        case 0x08: disctype = MMC_DISCTYPE_CD_ROM; break;
        case 0x09: disctype = MMC_DISCTYPE_CD_R; break;
        case 0x0A: disctype = MMC_DISCTYPE_CD_RW; break;

        case 0x10: disctype = MMC_DISCTYPE_DVD_ROM; break;
        case 0x11: disctype = MMC_DISCTYPE_DVD_R; break;
        case 0x12: disctype = MMC_DISCTYPE_DVD_RAM; break;
        case 0x13: disctype = MMC_DISCTYPE_DVD_RW_RO; break;
        case 0x14: disctype = MMC_DISCTYPE_DVD_RW_SR; break;
        case 0x15: disctype = MMC_DISCTYPE_DVD_R_DL_SR; break;
        case 0x16: disctype = MMC_DISCTYPE_DVD_R_DL_JR; break;
        case 0x1A: disctype = MMC_DISCTYPE_DVD_PRW; break;
        case 0x1B: disctype = MMC_DISCTYPE_DVD_PR; break;
        case 0x2A: disctype = MMC_DISCTYPE_DVD_PRW_DL; break;
        case 0x2B: disctype = MMC_DISCTYPE_DVD_PR_DL; break;

        case 0x40: disctype = MMC_DISCTYPE_BD_ROM; break;
        case 0x41: disctype = MMC_DISCTYPE_BD_R_SR; break;
        case 0x42: disctype = MMC_DISCTYPE_BD_R_RR; break;
        case 0x43: disctype = MMC_DISCTYPE_BD_RE; break;

        case 0x50: disctype = MMC_DISCTYPE_HD_DVD_ROM; break;
        case 0x51: disctype = MMC_DISCTYPE_HD_DVD_R; break;
        case 0x52: disctype = MMC_DISCTYPE_HD_DVD_RAM; break;
      }
      if (! profile_active) //whatever the profile is, disctype is reset in
not active
        disctype = MMC_DISCTYPE_NO_DISC;
      q += 4;
    }
  }

  return disctype; //the first active profile found (profiles are ordered
        //from the most desirable to least desirable) or
MMC_DISCTYPE_NO_DISC
}


bool
mmc_is_disctype_cdrom (disctype_t disctype) {
  switch (disctype) {
  case MMC_DISCTYPE_CD_ROM:
  case MMC_DISCTYPE_CD_R:
  case MMC_DISCTYPE_CD_RW:
    return true;
  default:
    return false;
  }
}


bool
mmc_is_disctype_dvd (disctype_t disctype) {
  switch (disctype) {
  case MMC_DISCTYPE_DVD_ROM:
  case MMC_DISCTYPE_DVD_RAM:
  case MMC_DISCTYPE_DVD_R:
  case MMC_DISCTYPE_DVD_RW_RO:
  case MMC_DISCTYPE_DVD_RW_SR:
  case MMC_DISCTYPE_DVD_R_DL_SR:
  case MMC_DISCTYPE_DVD_R_DL_JR:
  case MMC_DISCTYPE_DVD_PRW:
  case MMC_DISCTYPE_DVD_PR:
  case MMC_DISCTYPE_DVD_PRW_DL:
  case MMC_DISCTYPE_DVD_PR_DL:
    return true;
  default:
    return false;
  }
}


bool
mmc_is_disctype_bd (disctype_t disctype) {
  switch (disctype) {
  case MMC_DISCTYPE_BD_ROM:
  case MMC_DISCTYPE_BD_R_SR:
  case MMC_DISCTYPE_BD_R_RR:
  case MMC_DISCTYPE_BD_RE:
    return true;
  default:
    return false;
  }
}

bool
mmc_is_disctype_hd_dvd (disctype_t disctype) {
  switch (disctype) {
  case MMC_DISCTYPE_HD_DVD_ROM:
  case MMC_DISCTYPE_HD_DVD_R:
  case MMC_DISCTYPE_HD_DVD_RAM:
    return true;
  default:
    return false;
  }
}


bool
mmc_is_disctype_overwritable (disctype_t disctype) {
  switch (disctype) {
  case MMC_DISCTYPE_DVD_RW_RO:
  case MMC_DISCTYPE_DVD_R_DL_JR:
  case MMC_DISCTYPE_DVD_PRW:
  case MMC_DISCTYPE_DVD_PRW_DL:
  case MMC_DISCTYPE_BD_R_RR: //pseudo-overwritable
  case MMC_DISCTYPE_BD_RE:
  case MMC_DISCTYPE_HD_DVD_RAM:
    return true;
  default:
    return false;
  }
}


bool
mmc_is_disctype_rewritable (disctype_t disctype) { //discs that needs
blanking before re-use
  if (mmc_is_disctype_overwritable (disctype))
    return true;

  switch (disctype) {
  case MMC_DISCTYPE_CD_RW:
  case MMC_DISCTYPE_DVD_RW_SR:
  case MMC_DISCTYPE_BD_R_SR:
    return true;
  default:
    return false;
  }
}



What do You mean with: "These are missing in doc/glossary.texi, yet." : do I
have something to do ?

Bonne nuit :)

Frank


2010/2/7 Thomas Schmitt <address@hidden>

> Hi,
>
> >    case 0x16: disctype = MMC_DISCTYPE_DVD_R_DL; break;
> >    case 0x2A: disctype = MMC_DISCTYPE_DVD_PRW_DL; break;
> >    case 0x50: disctype = MMC_DISCTYPE_HD_DVD_ROM; break;
> >    case 0x51: disctype = MMC_DISCTYPE_HD_DVD_R; break;
> >    case 0x52: disctype = MMC_DISCTYPE_HD_DVD_RAM; break;
>
> These are missing in doc/glossary.texi, yet.
>
> 0x16 is DVD-R DL in Layer Jump Recording mode.
> I would really like to see a 0x2A DVD+RW DL
> some day.
> The HD DVD types are dead, of course.
>
>
> > mmc_is_disctype_rewritable (disctype_t disctype) {
> >   switch (disctype) {
> >   case MMC_DISCTYPE_CD_RW:
> >   case MMC_DISCTYPE_DVD_RW:
> >   case MMC_DISCTYPE_DVD_PRW:
> >   case MMC_DISCTYPE_DVD_PRW_DL:
> >   case MMC_DISCTYPE_BD_RE:
> >   case MMC_DISCTYPE_HD_DVD_RAM:
> >     return true;
>
> One should possibly distinguish media which need
> blanking before re-use
>  0x0A CD-RW
>  0x14 sequential DVD-RW
> from random-access overwriteable media (the
> others).
>
> That would mean to distinguish
>    case 0x13: disctype = MMC_DISCTYPE_DVD_RW; break;
>   case 0x14: disctype = MMC_DISCTYPE_DVD_RW; break;
> and
>    case 0x41: disctype = MMC_DISCTYPE_BD_R; break;
>   case 0x42: disctype = MMC_DISCTYPE_BD_R; break;
> as 0x42 is pseudo-overwriteable.
>
>
> Have a nice day :)
>
> Thomas
>
>
>
>


-- 
Frank Endres