NAME
Cdio::Device handles disc and device aspects of Cdio.
METHODS
new
new(source, driver_id, access_mode)->$device_object
Create a new Device object. Either driver_id or source can be undef. Probably best to not to give an access_mode too, unless you know what you are doing.
audio_pause
audio_pause(cdio)-> $status Pause playing CD through analog output. The device status is returned.
audio_play_lsn
audio_play_lsn(cdio, start_lsn, end_lsn)-> $status
Playing CD through analog output at the given lsn to the ending lsn The device status is returned.
audio_resume
audio_resume(cdio)-> $status
Resume playing an audio CD through the analog interface. The device status is returned.
audio_stop
audio_stop(cdio)-> $status
Stop playing an audio CD through the analog interface. The device status is returned.
close
close()->bool
Free resources associated with cdio. Call this when done using using CD reading/control operations for the current device.
eject_media
eject_media()->drc Eject media in CD drive if there is a routine to do so. status is returned.
get_arg
get_arg(key)->string
get_device
get_device()->str
Get the default CD device.
If the CD object has an opened CD, return the name of the device used. (In fact this is the same thing as issuiing "d->get_arg("source").
If we haven't initialized a specific device driver, then find a suitable one and return the default device for that.
In some situations of drivers or OS's we can't find a CD device if there is no media in it and it is possible for this routine to return undef even though there may be a hardware CD-ROM.
get_disc_last_lsn
get_disc_last_lsn(self)->int
Get the LSN of the end of the CD. $perlcdio::INVALID_LSN is returned if there was an error.
get_disc_mode
get_disc_mode() -> str
Get disc mode - the kind of CD: CD-DA, CD-ROM mode 1, CD-MIXED, etc. that we've got. The notion of 'CD' is extended a little to include DVD's.
get_drive_cap
get_drive_cap()->(read_cap, write_cap, misc_cap)
Get drive capabilities of device.
In some situations of drivers or OS's we can't find a CD device if there is no media in it. In this situation capabilities will show up as empty even though there is a hardware CD-ROM.
get_drive_cap_dev
get_drive_cap_dev(device=undef)->(read_cap, write_cap, misc_cap)
Get drive capabilities of device.
In some situations of drivers or OS's we can't find a CD device if there is no media in it. In this situation capabilities will show up as empty even though there is a hardware CD-ROM.
get_driver_name
get_driver_name()-> string
return a string containing the name of the driver in use. undef is returned if there's an error.
get_driver_id
get_driver_id()-> int
get_first_track
get_first_track()->Track
return a Track object of the first track. $perlcdio::INVALID_TRACK or $perlcdio::BAD_PARAMETER is returned if there was a problem.
Return the driver id of the driver in use. if object has not been initialized or is None, return $perlcdio::DRIVER_UNKNOWN.
get_hwinfo
get_hwinfo()->(vendor, model, release, drc)
Get the CD-ROM hardware info via a SCSI MMC INQUIRY command. An exception is raised if we had an error.
get_joliet_level
get_joliet_level()->int
Return the Joliet level recognized for cdio. This only makes sense for something that has an ISO-9660 filesystem.
get_last_session
get_last_session(self) -> (track_lsn, drc)
Get the LSN of the first track of the last session of on the CD.
get_last_track
get_last_track(self)->Track
return a Track object of the last track. $perlcdio::INVALID_TRACK or $perlcdio::BAD_PARAMETER is returned if there was a problem.
get_mcn
get_mcn()->str
Get the media catalog number (MCN) from the CD.
get_media_changed
get_media_changed() -> int
Find out if media has changed since the last call. Return 1 if media has changed since last call, 0 if not. A negative number indicates the driver status error.
get_num_tracks
get_num_tracks()->int
Return the number of tracks on the CD. perlcdio::INVALID_TRACK is raised on error.
get_track
get_track(track_num)->track
Set a new track object of the current disc for the given track number.
get_track_for_lsn
get_track_for_lsn(LSN)->Track
Find the track which contains LSN. undef is returned if the lsn outside of the CD or if there was some error.
If the LSN is before the pregap of the first track, A track object with a 0 track is returned. Otherwise we return the track that spans the lsn.
have_ATAPI
have_ATAPI()->bool
return 1 if CD-ROM understand ATAPI commands.
lseek
lseek(offset, whence)->int
Reposition read offset. Similar to (if not the same as) libc's fseek()
offset is the amount to seek and whence is like corresponding parameter in libc's lseek, e.g. it should be SEEK_SET or SEEK_END.
the offset is returned or -1 on error.
open
open(source=undef, driver_id=$libcdio::DRIVER_UNKNOWN, access_mode=undef)
Sets up to read from place specified by source, driver_id and access mode. This should be called before using any other routine except those that act on a CD-ROM drive by name. It is implicitly called when a new is done specifying a source or driver id.
If undef is given as the source, we'll use the default driver device. If undef is given as the driver_id, we'll find a suitable device driver. Device is opened so that subsequent operations can be performed.
read
read(size)->(size, data)
Reads the next size bytes. Similar to (if not the same as) libc's read()
The number of bytes read and the data is returned.
read_data_blocks
read_data_blocks(lsn, blocks=1)->($data, $size, $drc)
Reads a number of data sectors (AKA blocks).
lsn is sector to read, blocks is the number of bytes.
The size of the data will be a multiple of $perlcdio::ISO_BLOCKSIZE.
The number of data, size of the data, and the return code status is returned in an array context. In a scalar context just the data is returned. undef is returned as the data on error.
read_sectors
read_sectors($lsn, $read_mode, $blocks=1)->($data, $size, $drc) read_sectors($lsn, $read_mode, $blocks=1)->$data
Reads a number of sectors (AKA blocks).
lsn is sector to read, bytes is the number of bytes.
If read_mode is $perlcdio::MODE_AUDIO, the return data size will be a multiple of $perlcdio::CDIO_FRAMESIZE_RAW i_blocks bytes.
If read_mode is $perlcdio::MODE_DATA, data will be a multiple of $perlcdio::ISO_BLOCKSIZE, $perlcdio::M1RAW_SECTOR_SIZE or $perlcdio::M2F2_SECTOR_SIZE bytes depending on what mode the data is in.
If read_mode is $perlcdio::MODE_M2F1, data will be a multiple of $perlcdio::M2RAW_SECTOR_SIZE bytes.
If read_mode is $perlcdio::MODE_M2F2, the return data size will be a multiple of $perlcdio::CD_FRAMESIZE bytes.
The number of data, size of the data, and the return code status is returned in an array context. In a scalar context just the data is returned. undef is returned as the data on error.
set_blocksize
set_blocksize(blocksize) -> $status
Set the blocksize for subsequent reads. The operation status code is returned.
set_speed
set_speed(speed)->drc
The operation status code is returned.
SEE ALSO
Device::Cdio for the top-level routines and Device::Cdio::Track for track objects.
perlcdio is the lower-level interface to libcdio.
http://www.gnu.org/software/libcdio has documentation on libcdio including the a manual and the API via doxygen.
AUTHORS
Rocky Bernstein <rocky at cpan.org>.
COPYRIGHT
Copyright (C) 2006 Rocky Bernstein <rocky@cpan.org>
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA