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Code Issues Projects Releases Packages Wiki Activity Actions 8

VFile.py: fix bogus getrandomframe().

Browse source 
Vedit.py, VeditForm.fd: added scroll bar, Trunc, layout rearrangement.
Viewer.py: added random access, qinfo() function.
This commit is contained in:
Guido van Rossum 1993-02-16 16:10:02 +00:00
parent 4e2a4278e8
commit 9b86e1f5f0
4 changed files with 224 additions and 90 deletions
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79
Demo/sgi/video/Viewer.py
View file

@ -5,16 +5,17 @@ import os
class InputViewer:
def init(self, filename, title, qsize):
def init(self, filename, title, *args):
try:
self.vin = VFile.VinFile().init(filename)
except (EOFError, VFile.Error):
raise IOError, 'bad video input file'
self.vin.warmcache()
if not title:
title = os.path.split(filename)[1]
self.filename = filename
self.title = title
self.qsize = qsize
self.qsize = len(self.vin.index)
gl.foreground()
gl.prefsize(self.vin.width, self.vin.height)
self.wid = -1
@ -39,27 +40,7 @@ class InputViewer:
gl.winset(self.wid)
gl.clear()
self.vin.initcolormap()
self.queue = []
self.qindex = 0
self.lost = 0
self.lastt = 0
self.eofread = 0
# Internal
def fillq(self):
if self.qindex < len(self.queue) or self.eofread: return
try:
t, d, cd = self.vin.getnextframe()
except EOFError:
self.eofread = 1
return
dt = t - self.lastt
self.lastt = t
self.queue.append(dt, d, cd)
while len(self.queue) > self.qsize:
del self.queue[0]
self.qindex = self.qindex - 1
self.lost = self.lost + 1
def show(self):
if self.wid < 0:
@ -68,12 +49,11 @@ class InputViewer:
self.wid = gl.winopen(self.title)
gl.clear()
self.vin.initcolormap()
self.fillq()
gl.winset(self.wid)
if self.qindex >= len(self.queue):
if self.qindex >= self.qsize:
self.vin.clear()
return
dt, d, cd = self.queue[self.qindex]
dt, d, cd = self.vin.getrandomframe(self.qindex)
self.vin.showframe(d, cd)
def redraw(self, wid):
@ -84,13 +64,16 @@ class InputViewer:
self.show()
def get(self):
if self.qindex >= len(self.queue):
self.fillq()
if self.eofread:
return None
item = self.queue[self.qindex]
if self.qindex >= self.qsize:
return None
if self.qindex > 0:
prevt, ds, cs = \
self.vin.getrandomframeheader(self.qindex-1)
else:
prevt = 0
t, data, cdata = self.vin.getrandomframe(self.qindex)
self.qindex = self.qindex + 1
return item
return t-prevt, data, cdata
def backup(self):
if self.qindex == 0:
@ -98,11 +81,20 @@ class InputViewer:
self.qindex = self.qindex - 1
return 1
def seek(self, i):
if not 0 <= i <= self.qsize:
return 0
self.qindex = i
return 1
def tell(self):
return self.lost + self.qindex
return self.qindex
def qsizes(self):
return self.qindex, len(self.queue) - self.qindex
return self.qindex, self.qsize - self.qindex
def qinfo(self):
return 0, self.qindex, self.qsize
class OutputViewer:
@ -206,12 +198,33 @@ class OutputViewer:
while len(self.queue) > self.qsize:
self.flushq()
def seek(self, i):
i = i - self.written
if not 0 <= i <= len(self.queue) + len(self.spares):
return 0
while i < len(self.queue):
if not self.backup():
return 0
while i > len(self.queue):
if not self.forward():
return 0
return 1
def trunc(self):
del self.spares[:]
def tell(self):
return self.written + len(self.queue)
def qsizes(self):
return len(self.queue), len(self.spares)
def qinfo(self):
first = self.written
pos = first + len(self.queue)
last = pos + len(self.spares)
return first, pos, last
def test():
import sys