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Интерактивная система просмотра системных руководств (man-ов)

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radio_recv (6)
  • >> radio_recv (6) ( Solaris man: Игры )
         radio_recv - radio receive utility
         radio_recv [ -C ] [
         OPTION=value ] ...
         This program is furnished on an AS IS basis as a  demonstra-
         tion of audio applications programming.
         radio_recv is the Radio Free Ethernet (RFE)  receiver.  (For
         an  overview  of  Radio Free Ethernet, refer to the radio(6)
         manual  page.)  Though  radio_recv  is  normally   initiated
         directly  by  the window-based radio(6) program, it may also
         be used directly as a command-line program, or  in  conjunc-
         tion with a user-written window-based tool.
         In Normal Mode (the default case), radio_recv  is  initiated
         with  a  set  of  receiver  options specified on the command
         line. The program immediately begins  scanning  the  network
         for  radio  broadcasts  according  to the currently selected
         options. The program will terminate on receipt of  a  SIGINT
         (CTRL-C). Once the receiver tunes in a broadcasting station,
         the program will exit when the station signs off.
         If -C is specified on the command line, radio_recv  operates
         in  Command  Mode.   In  this  mode,  the  program reads and
         processes command options from stdin and  writes  error  and
         status information to stderr. Window-based tools use Command
         Mode to control the  receiver  program  and  receive  status
         information for display.
          When operating in Command Mode, radio_recv requires that an
         output device be specified explicitly, and the START command
         must be issued to initiate radio reception.
         The receiver options are  described  below.   If  an  option
         requires  a  value,  the  option name must be followed by an
         equal sign (=) and the value. If an option takes  an  ON/OFF
         value,  the  default is ON if the value is missing or poorly
         Station=[call letters]
               This option specifies the station call  letters  of  a
               radio  station  to tune in.  A maximum of four charac-
               ters may be specified.  If  the  receiver  is  enabled
               without  specifying  a station, the receiver will tune
               in the first station that is transmitting audio data.
         Output=[audio device name]
               This option specifies the audio output device. In Nor-
               mal Mode, the audio output defaults to /dev/audio.
               When the receiver tunes in a radio station, it assumes
               exclusive  control  of  the  audio  output device.  If
               another process attempts to claim the audio device for
               output,  it  will fail (or suspend until the device is
               released). In such cases, the radio_recv  program  may
               be  notified that another process is competing for the
               audio output channel.
               If the Release option is enabled,  the  receiver  will
               automatically  release  the  audio  device  when  such
               notification  occurs,  allowing  other  processes  the
               opportunity  to claim the device.  As long as the dev-
               ice remains unavailable, the receiver will throw  away
               any  radio  broadcast packets that are detected.  When
               the device  is  available  again,  the  receiver  will
               reclaim  it  and  continue  playing the incoming audio
               data.  If the Release option is  disabled,  radio_recv
               will  maintain  exclusive  control of the audio device
               until it is explicitly stopped or the  incoming  radio
               station signs off.
               The Release option is enabled by default.
               This option is used  to  configure  the  IP  Multicast
               address  that  the  radio_recv  program uses to locate
               radio broadcasts.  The value may either be a  hostname
               (which  is  translated into an IP Multicast address by
               looking up the  name  in  the  NIS  hosts  map)  or  a
               specific  numeric  IP  Multicast address.  The special
               hostname BROADCAST may be used to force the program to
               scan only for UDP Broadcast packets.
               The default IP Multicast address is designated by  the
               hostname  RadioFreeEthernet.  The radio(6) manual page
               contains more information on the IP  Multicast  imple-
         Service=[service|port number]
               This option is used to configure the IP protocol  port
               number  used  to  identify Radio Free Ethernet network
               packets.  The value  may  be  either  a  service  name
               (which  is translated into a port number by looking up
               the name in  the  NIS  services  map)  or  a  specific
               numeric port number.
               The default port number is designated by  the  service
               name  radio.  The  radio(6)  manual page contains more
               information on configuring the port number.
               This option enables the reporting, to stderr,  of  all
               changes  in  the  receiver  status.   This option also
               enables the reporting of the active station list.  The
               station  list  details  the  state of all active radio
               stations, and is output whenever  a  state  change  is
               observed.  The  Report option is normally used only in
               conjunction with Command Mode to allow the controlling
               program to maintain state.
         Scan  This command is used to initiate scanning  for  a  new
               radio station. The receiver tunes in to the next radio
               station whose broadcast  is  detected.  When  multiple
               stations  are  actively  broadcasting, the scan cycles
               through them all before  repeating  a  station.   Note
               that  stations  whose broadcast is being squelched due
               to a silent input signal are not tuned in.
         Start This command  is  used  to  initiate  radio  reception
               according  to  the  current parameter settings.  It is
               provided for Command Mode; the receiver is enabled  by
               default in Normal Mode.
         Stop  This command is used to turn off the receiver.  Queued
               audio  data  is  flushed  so  that  audio output stops
               immediately. The Stop command is provided for the Com-
               mand Mode operation.
         Quit  This command causes the radio_recv program to exit. It
               is provided for the Command Mode operation.
         radio(6), radio_xmit(6), xmit(6)

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