Open Mash Cross Reference
mash/tcl/cache/player.tcl

   # player.tcl --
   #
   #       Record and playback urls for tracing purposes. Based on the
   #       mb TCL_Recorder / TCL_Player objects.
   #
   # Copyright (c) 1998-2002 The Regents of the University of California.
   # All rights reserved.
   #
   # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # A. Redistributions of source code must retain the above copyright notice,
  #    this list of conditions and the following disclaimer.
  # B. Redistributions in binary form must reproduce the above copyright notice,
  #    this list of conditions and the following disclaimer in the documentation
  #    and/or other materials provided with the distribution.
  # C. Neither the names of the copyright holders nor the names of its
  #    contributors may be used to endorse or promote products derived from this
  #    software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
  # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  #
  #  $Header: /usr/mash/src/repository/mash/mash-1/tcl/cache/player.tcl,v 1.4 2002/02/03 04:25:37 lim Exp $
  
  
  Class WC_Recorder
  
  WC_Recorder instproc init { logfname } {
          $self instvar logf_ st_
  
          set st_ [gettimeofday]
          set logf_ [open $logfname "w+"]
  }
  
  WC_Recorder public record { url } {
          $self instvar st_ logf_
  
          puts $logf_ "[expr [gettimeofday] - $st_] $url"
          flush $logf_
  }
  
  Class WC_Player
  
  WC_Player instproc init { logfname target rt } {
          $self instvar logf_ tgt_ isRealTime_
          set logf_ [open $logfname "r+"]
          set tgt_ $target
          set isRealTime_ $rt
  }
  
  WC_Player instproc start {} {
          $self instvar st_ now_ nextCmd_ nextURL_
          set now_ 0
          set nextURL_ ""
          $self run_next
  }
  
  WC_Player instproc run_next { } {
          $self instvar logf_ tgt_ nextURL_ now_ isRealTime_
  
          # get the current URL
          if { $nextURL_ != "" } {
                  $tgt_ get $nextURL_
          }
  
          # find the next URL to play
          set u [gets $logf_ line]
          if { $u == -1 } {
                  close $logf_
                  delete $self
                  return
          }
          set nextURL_ [lindex $line 1]
  
          # schedule the next call to $tgt get
          if $isRealTime_ {
                  set currTime $now_
                  set nexttime [expr int ([lindex $line 0] * 1000)]
                  set now_ $nexttime
                  after [expr $nexttime - $currTime] "$self run_next"
          } else {
                  after idle "$self run_next"
          }
  }