This module can now be used asynchronously. Also, some commands
have been added.
diff --git a/Demo/sgi/video/VCR.py b/Demo/sgi/video/VCR.py
index d99fce6..a6aacff 100755
--- a/Demo/sgi/video/VCR.py
+++ b/Demo/sgi/video/VCR.py
@@ -5,6 +5,7 @@
import struct
import select
import posix
+import time
DEVICE='/dev/ttyd2'
@@ -75,20 +76,8 @@
dummy = fcntl.ioctl(fd, IOCTL.TCSETA, arg)
return fp, ofp
-#ifp, ofp = initline('/dev/ttyd2')
-#while 1:
-# print 'GO'
-# inset, d, d = select.select([sys.stdin, ifp], [], [])
-# if sys.stdin in inset:
-# cmd = eval(sys.stdin.readline(100))
-# print 'CMD:', `cmd`
-# if cmd:
-# ofp.write(cmd)
-# ofp.flush()
-# if ifp in inset:
-# data = ifp.read(1)
-# print 'LEN', len(data), 'DATA', `data`
-
+#
+#
error = 'VCR.error'
# Commands/replies:
@@ -116,12 +105,17 @@
STEP_FWD ='\x2b' # Was: '\xad'
FM_SELECT=EXP_8 + '\xc8'
FM_STILL=EXP_8 + '\xcd'
+PREVIEW=EXP_7 + '\x9d'
+REVIEW=EXP_7 + '\x9e'
DM_OFF=EXP_8 + '\xc9'
DM_SET=EXP_8 + '\xc4'
FWD_SHUTTLE='\xb5'
REV_SHUTTLE='\xb6'
EM_SELECT=EXP_8 + '\xc0'
N_FRAME_REC=EXP_8 + '\x92'
+SEARCH_PREROLL=EXP_8 + '\x90'
+EDIT_PB_STANDBY=EXP_8 + '\x96'
+EDIT_PLAY=EXP_8 + '\x98'
IN_ENTRY=EXP_7 + '\x90'
IN_ENTRY_RESET=EXP_7 + '\x91'
@@ -137,13 +131,55 @@
OUT_ENTRY_DEC=EXP_7 + '\x98'
OUT_ENTRY_SENSE=EXP_7 + '\x9b'
+MUTE_AUDIO = '\x24'
+MUTE_AUDIO_OFF = '\x25'
+MUTE_VIDEO = '\x26'
+MUTE_VIDEO_OFF = '\x27'
+MUTE_AV = EXP_7 + '\xc6'
+MUTE_AV_OFF = EXP_7 + '\xc7'
+
DEBUG=0
class VCR:
def init(self):
self.ifp, self.ofp = initline(DEVICE)
+ self.busy_cmd = None
+ self.async = 0
+ self.cb = None
+ self.cb_arg = None
return self
+ def _check(self):
+ if self.busy_cmd:
+ raise error, 'Another command active: '+self.busy_cmd
+
+ def _endlongcmd(self, name):
+ if not self.async:
+ self.waitready()
+ return 1
+ self.busy_cmd = name
+ return 'VCR BUSY'
+
+ def fileno(self):
+ return self.ifp.fileno()
+
+ def setasync(self, async):
+ self.async = async
+
+ def setcallback(self, cb, arg):
+ self.setasync(1)
+ self.cb = cb
+ self.cb_arg = arg
+
+ def poll(self):
+ if not self.async:
+ raise error, 'Can only call poll() in async mode'
+ if not self.busy_cmd:
+ return
+ if self.testready():
+ if self.cb:
+ apply(self.cb, self.cb_arg)
+
def _cmd(self, cmd):
if DEBUG:
print '>>>',`cmd`
@@ -153,12 +189,16 @@
def _waitdata(self, len, tout):
rep = ''
while len > 0:
- ready, d1, d2 = select.select([self.ifp], [], [], tout)
+ if tout == None:
+ ready, d1, d2 = select.select( \
+ [self.ifp], [], [])
+ else:
+ ready, d1, d2 = select.select( \
+ [self.ifp], [], [], tout)
if ready == []:
## if rep:
## print 'FLUSHED:', `rep`
return None
- # XXXX Niet goed: er is meer gebufferd!
data = self.ifp.read(1)
if DEBUG:
print '<<<',`data`
@@ -219,7 +259,12 @@
if not ok:
raise error, 'Error while transmitting number'
- def wait(self):
+ def initvcr(self, *optarg):
+ timeout = None
+ if optarg <> ():
+ timeout = optarg[0]
+ starttime = time.time()
+ self.busy_cmd = None
self._iflush()
while 1:
## print 'SENDCL'
@@ -227,6 +272,10 @@
rep = self._waitdata(1, 2)
## print `rep`
if rep in ( None, CL, NAK ):
+ if timeout:
+ if time.time() - starttime > timeout:
+ raise error, \
+ 'No reply from VCR'
continue
break
if rep <> ACK:
@@ -234,12 +283,23 @@
dummy = self.simplecmd(CTRL_ENABLE)
def waitready(self):
- rep = self._waitdata(1, 60)
+ rep = self._waitdata(1, None)
if rep == None:
- raise error, 'Command not finished in one minute'
+ raise error, 'Unexpected None reply from waitdata'
if rep not in (COMPLETION, ACK):
self._iflush()
raise error, 'Unexpected waitready reply:' + `rep`
+ self.busy_cmd = None
+
+ def testready(self):
+ rep = self._waitdata(1, 0)
+ if rep == None:
+ return 0
+ if rep not in (COMPLETION, ACK):
+ self._iflush()
+ raise error, 'Unexpected waitready reply:' + `rep`
+ self.busy_cmd = None
+ return 1
def play(self): return self.simplecmd(PLAY)
def stop(self): return self.simplecmd(STOP)
@@ -258,11 +318,11 @@
self._number(f, 2)
if not self.simplecmd(ENTER):
return 0
- self.waitready()
- return 1
+ return self._endlongcmd('goto')
# XXXX TC_SENSE doesn't seem to work
def faulty_where(self):
+ self._check()
self._cmd(TC_SENSE)
h = self._getnumber(2)
m = self._getnumber(2)
@@ -274,6 +334,7 @@
return self.addr2tc(self.sense())
def sense(self):
+ self._check()
self._cmd(ADDR_SENSE)
num = self._getnumber(5)
return num
@@ -291,6 +352,7 @@
return ((h*60 + m)*60 + s)*25 + f
def fmmode(self, mode):
+ self._check()
if mode == 'off':
arg = 0
elif mode == 'buffer':
@@ -306,7 +368,21 @@
return 0
return 1
+ def mute(self, mode, value):
+ self._check()
+ if mode == 'audio':
+ cmds = (MUTE_AUDIO_OFF, MUTE_AUDIO)
+ elif mode == 'video':
+ cmds = (MUTE_VIDEO_OFF, MUTE_VIDEO)
+ elif mode == 'av':
+ cmds = (MUTE_AV_OFF, MUTE_AV)
+ else:
+ raise error, 'mute type should be audio, video or av'
+ cmd = cmds[value]
+ return self.simplecmd(cmd)
+
def editmode(self, mode):
+ self._check()
if mode == 'off':
a0 = a1 = a2 = 0
elif mode == 'format':
@@ -338,16 +414,40 @@
self._number(num, 4)
if not self.simplecmd(ENTER):
return 0
- self.waitready()
- return 1
+ return self._endlongcmd('nframerec')
def fmstill(self):
if not self.simplecmd(FM_STILL):
return 0
- self.waitready()
- return 1
+ return self._endlongcmd('fmstill')
+
+ def preview(self):
+ if not self.simplecmd(PREVIEW):
+ return 0
+ return self._endlongcmd('preview')
+
+ def review(self):
+ if not self.simplecmd(REVIEW):
+ return 0
+ return self._endlongcmd('review')
+
+ def search_preroll(self):
+ if not self.simplecmd(SEARCH_PREROLL):
+ return 0
+ return self._endlongcmd('search_preroll')
+
+ def edit_pb_standby(self):
+ if not self.simplecmd(EDIT_PB_STANDBY):
+ return 0
+ return self._endlongcmd('edit_pb_standby')
+
+ def edit_play(self):
+ if not self.simplecmd(EDIT_PLAY):
+ return 0
+ return self._endlongcmd('edit_play')
def dmcontrol(self, mode):
+ self._check()
if mode == 'off':
return self.simplecmd(DM_OFF)
if mode == 'multi freeze':
@@ -380,6 +480,7 @@
return 1
def getentry(self, which):
+ self._check()
if which == 'in':
cmd = IN_ENTRY_SENSE
elif which == 'out':
@@ -404,6 +505,7 @@
OUT_ENTRY_SET, OUT_ENTRY_INC, OUT_ENTRY_DEC))
def ioentry(self, arg, (Load, Clear, Set, Inc, Dec)):
+ self._check()
if type(arg) == type(()):
h, m, s, f = arg
if not self.simplecmd(Set):