mirror of
https://github.com/python/cpython.git
synced 2025-07-29 14:15:07 +00:00
Created Vedit.py, the video editor. This uses the classes in Viewer.py.
Viewer.py in turn requires changes to VFile.py (unfortunately that file is now a complete mess...).
This commit is contained in:
Guido van Rossum
parent
e1b4d7ce14
commit
9ee7e15966
6 changed files with 1080 additions and 217 deletions
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@ -52,116 +52,12 @@ def conv_rgb8(rgb,d1,d2):
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# xorigin, yorigin
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# fallback
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class VinFile:
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# init() and initfp() raise Error if the header is bad.
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# init() raises whatever open() raises if the file can't be opened.
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def init(self, filename):
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if filename == '-':
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return self.initfp(sys.stdin, filename)
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return self.initfp(open(filename, 'r'), filename)
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def initfp(self, fp, filename):
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self.colormapinited = 0
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self.magnify = 1.0
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self.xorigin = self.yorigin = 0
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self.fallback = 1
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self.skipchrom = 0
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self.fp = fp
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self.filename = filename
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self.quiet = 0
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#
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line = self.fp.readline()
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if line == 'CMIF video 1.0\n':
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self.version = 1.0
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elif line == 'CMIF video 2.0\n':
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self.version = 2.0
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elif line == 'CMIF video 3.0\n':
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self.version = 3.0
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else:
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raise Error, self.filename + ': bad video format'
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#
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if self.version < 2.0:
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self.c0bits, self.c1bits, self.c2bits = 8, 0, 0
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self.chrompack = 0
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self.offset = 0
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self.format = 'grey'
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elif self.version == 2.0:
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line = self.fp.readline()
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try:
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self.c0bits, self.c1bits, self.c2bits, \
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self.chrompack = eval(line[:-1])
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if self.c1bits or self.c2bits:
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self.format = 'yiq'
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else:
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self.format = 'grey'
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self.offset = 0
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except:
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raise Error, \
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self.filename + ': bad 2.0 color info'
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elif self.version == 3.0:
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line = self.fp.readline()
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try:
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self.format, rest = eval(line[:-1])
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if self.format == 'rgb':
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self.offset = 0
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self.c0bits = 0
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self.c1bits = 0
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self.c2bits = 0
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self.chrompack = 0
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elif self.format == 'grey':
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self.offset = 0
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self.c0bits = rest
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self.c1bits = self.c2bits = \
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self.chrompack = 0
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else:
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self.c0bits,self.c1bits,self.c2bits,\
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self.chrompack,self.offset = rest
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except:
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raise Error, \
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self.filename + ': bad 3.0 color info'
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try:
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self.convcolor = eval('conv_'+self.format)
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except:
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raise Error, \
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self.filename + ': unknown colorsys ' + self.format
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#
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line = self.fp.readline()
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try:
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x = eval(line[:-1])
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if self.version > 1.0 or len(x) == 3:
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self.width, self.height, self.packfactor = x
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if self.packfactor == 0:
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self.format = 'rgb'
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else:
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sef.width, self.height = x
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self.packfactor = 2
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except:
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raise Error, self.filename + ': bad (w,h,pf) info'
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self.frameno = 0
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self.framecache = []
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self.hascache = 0
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#
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return self
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def warmcache(self):
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if self.hascache: return
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n = 0
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try:
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while 1:
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void = self.skipnextframe()
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n = n + 1
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except EOFError:
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pass
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if not self.hascache:
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raise Error, 'Cannot warm cache'
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def close(self):
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self.fp.close()
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self.fp = None
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# XXX it's a total mess now -- VFile is a new base class
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# XXX to support common functionality (e.g. showframe)
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class VFile:
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#
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# getinfo returns all info pertaining to a film. The returned tuple
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@ -179,96 +75,12 @@ class VinFile:
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self.fp.seek(0)
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x = self.initfp(self.fp, self.filename)
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def rewind(self):
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if self.hascache:
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self.frameno = 0
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else:
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self.reopen()
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def position(self):
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if self.frameno >= len(self.framecache):
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raise EOFError
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self.fp.seek(self.framecache[self.frameno][0])
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# getnextframe() raises EOFError (built-in) if there is no next frame,
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# or if the next frame is broken.
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# So to getnextframeheader(), getnextframedata() and skipnextframe().
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def getnextframe(self):
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time, size, chromsize = self.getnextframeheader()
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data, chromdata = self.getnextframedata(size, chromsize)
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return time, data, chromdata
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def getnextframedata(self, size, chromsize):
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if self.hascache:
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self.position()
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self.frameno = self.frameno + 1
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data = self.fp.read(size)
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if len(data) <> size: raise EOFError
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if chromsize:
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chromdata = self.fp.read(chromsize)
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if len(chromdata) <> chromsize: raise EOFError
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else:
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chromdata = None
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#
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return data, chromdata
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def skipnextframe(self):
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time, size, chromsize = self.getnextframeheader()
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self.skipnextframedata(size, chromsize)
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return time
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def skipnextframedata(self, size, chromsize):
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if self.hascache:
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self.frameno = self.frameno + 1
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return
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# Note that this won't raise EOFError for a partial frame.
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def setconvcolor(self):
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try:
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self.fp.seek(size + chromsize, 1) # Relative seek
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self.convcolor = eval('conv_'+self.format)
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except:
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# Assume it's a pipe -- read the data to discard it
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dummy = self.fp.read(size + chromsize)
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def getnextframeheader(self):
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if self.hascache:
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if self.frameno >= len(self.framecache):
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raise EOFError
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return self.framecache[self.frameno][1]
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line = self.fp.readline()
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if not line:
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self.hascache = 1
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raise EOFError
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#
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w, h, pf = self.width, self.height, self.packfactor
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try:
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x = eval(line[:-1])
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if type(x) in (type(0), type(0.0)):
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time = x
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if pf == 0:
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size = w * h * 4
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else:
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size = (w/pf) * (h/pf)
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elif len(x) == 2:
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time, size = x
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cp = self.chrompack
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if cp:
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cw = (w + cp - 1) / cp
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ch = (h + cp - 1) / cp
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chromsize = 2 * cw * ch
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else:
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chromsize = 0
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else:
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time, size, chromsize = x
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except:
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raise Error, self.filename + ': bad frame header'
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cdata = (self.fp.tell(), (time, size, chromsize))
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self.framecache.append(cdata)
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return time, size, chromsize
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def shownextframe(self):
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time, data, chromdata = self.getnextframe()
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self.showframe(data, chromdata)
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return time
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raise Error, \
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self.filename + ': unknown colorsys ' + self.format
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def showframe(self, data, chromdata):
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w, h, pf = self.width, self.height, self.packfactor
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@ -369,6 +181,205 @@ class VinFile:
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gl.mapcolor(index, r, g, b)
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void = gl.gflush()
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class VinFile(VFile):
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# init() and initfp() raise Error if the header is bad.
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# init() raises whatever open() raises if the file can't be opened.
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def init(self, filename):
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if filename == '-':
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return self.initfp(sys.stdin, filename)
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return self.initfp(open(filename, 'r'), filename)
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def initfp(self, fp, filename):
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self.colormapinited = 0
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self.magnify = 1.0
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self.xorigin = self.yorigin = 0
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self.fallback = 1
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self.skipchrom = 0
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self.fp = fp
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self.filename = filename
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self.quiet = 0
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#
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line = self.fp.readline()
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if line == 'CMIF video 1.0\n':
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self.version = 1.0
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elif line == 'CMIF video 2.0\n':
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self.version = 2.0
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elif line == 'CMIF video 3.0\n':
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self.version = 3.0
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else:
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raise Error, self.filename + ': bad video format'
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#
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if self.version < 2.0:
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self.c0bits, self.c1bits, self.c2bits = 8, 0, 0
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self.chrompack = 0
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self.offset = 0
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self.format = 'grey'
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elif self.version == 2.0:
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line = self.fp.readline()
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try:
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self.c0bits, self.c1bits, self.c2bits, \
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self.chrompack = eval(line[:-1])
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if self.c1bits or self.c2bits:
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self.format = 'yiq'
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else:
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self.format = 'grey'
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self.offset = 0
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except:
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raise Error, \
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self.filename + ': bad 2.0 color info'
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elif self.version == 3.0:
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line = self.fp.readline()
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try:
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self.format, rest = eval(line[:-1])
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if self.format == 'rgb':
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self.offset = 0
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self.c0bits = 0
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self.c1bits = 0
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self.c2bits = 0
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self.chrompack = 0
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elif self.format == 'grey':
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self.offset = 0
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self.c0bits = rest
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self.c1bits = self.c2bits = \
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self.chrompack = 0
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else:
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self.c0bits,self.c1bits,self.c2bits,\
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self.chrompack,self.offset = rest
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except:
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raise Error, \
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self.filename + ': bad 3.0 color info'
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self.setconvcolor()
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#
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line = self.fp.readline()
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try:
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x = eval(line[:-1])
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if self.version > 1.0 or len(x) == 3:
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self.width, self.height, self.packfactor = x
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if self.packfactor == 0:
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self.format = 'rgb'
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else:
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sef.width, self.height = x
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self.packfactor = 2
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except:
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raise Error, self.filename + ': bad (w,h,pf) info'
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self.frameno = 0
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self.framecache = []
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self.hascache = 0
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#
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return self
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def warmcache(self):
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if self.hascache: return
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n = 0
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try:
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while 1:
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void = self.skipnextframe()
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n = n + 1
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except EOFError:
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pass
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if not self.hascache:
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raise Error, 'Cannot warm cache'
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def close(self):
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self.fp.close()
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self.fp = None
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def rewind(self):
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if self.hascache:
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self.frameno = 0
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else:
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self.reopen()
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def position(self):
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if self.frameno >= len(self.framecache):
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raise EOFError
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self.fp.seek(self.framecache[self.frameno][0])
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# getnextframe() raises EOFError (built-in) if there is no next frame,
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# or if the next frame is broken.
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# So to getnextframeheader(), getnextframedata() and skipnextframe().
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def getnextframe(self):
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time, size, chromsize = self.getnextframeheader()
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data, chromdata = self.getnextframedata(size, chromsize)
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return time, data, chromdata
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def getnextframedata(self, size, chromsize):
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if self.hascache:
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self.position()
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self.frameno = self.frameno + 1
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data = self.fp.read(size)
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if len(data) <> size: raise EOFError
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if chromsize:
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chromdata = self.fp.read(chromsize)
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if len(chromdata) <> chromsize: raise EOFError
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else:
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chromdata = None
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#
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return data, chromdata
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def skipnextframe(self):
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time, size, chromsize = self.getnextframeheader()
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self.skipnextframedata(size, chromsize)
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return time
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def skipnextframedata(self, size, chromsize):
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if self.hascache:
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self.frameno = self.frameno + 1
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return
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# Note that this won't raise EOFError for a partial frame.
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try:
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self.fp.seek(size + chromsize, 1) # Relative seek
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except:
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# Assume it's a pipe -- read the data to discard it
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dummy = self.fp.read(size + chromsize)
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def getnextframeheader(self):
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if self.hascache:
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if self.frameno >= len(self.framecache):
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raise EOFError
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return self.framecache[self.frameno][1]
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line = self.fp.readline()
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if not line:
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self.hascache = 1
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raise EOFError
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#
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w, h, pf = self.width, self.height, self.packfactor
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try:
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x = eval(line[:-1])
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if type(x) in (type(0), type(0.0)):
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time = x
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if pf == 0:
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size = w * h * 4
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else:
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size = (w/pf) * (h/pf)
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elif len(x) == 2:
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time, size = x
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cp = self.chrompack
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if cp:
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cw = (w + cp - 1) / cp
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ch = (h + cp - 1) / cp
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chromsize = 2 * cw * ch
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else:
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chromsize = 0
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else:
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time, size, chromsize = x
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except:
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raise Error, self.filename + ': bad frame header'
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cdata = (self.fp.tell(), (time, size, chromsize))
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self.framecache.append(cdata)
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return time, size, chromsize
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def shownextframe(self):
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time, data, chromdata = self.getnextframe()
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self.showframe(data, chromdata)
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return time
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#
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# A set of routines to grab images from windows
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#
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@ -417,7 +428,7 @@ def grab_hsv(w, h, pf):
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# Notably it will accept almost any garbage and write it to the video
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# output file
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#
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class VoutFile:
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class VoutFile(VFile):
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def init(self, filename):
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if filename == '-':
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return self.initfp(sys.stdout, filename)
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@ -434,21 +445,21 @@ class VoutFile:
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self.offset = 0
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self.chrompack = 0
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self.headerwritten = 0
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self.quiet = 0
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self.magnify = 1
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self.setconvcolor()
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self.xorigin = self.yorigin = 0
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return self
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def close(self):
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self.fp.close()
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x = self.initfp(None, None)
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def getinfo(self):
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return (self.format, self.width, self.height, self.packfactor,\
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self.c0bits, self.c1bits, self.c2bits, self.offset, \
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self.chrompack)
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def setinfo(self, values):
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self.format, self.width, self.height, self.packfactor,\
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self.c0bits, self.c1bits, self.c2bits, self.offset, \
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self.chrompack = values
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self.setconvcolor()
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def writeheader(self):
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self.headerwritten = 1
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