From 58b38ccc9d8ac7937dff4cc86f4908f9217c53f7 Mon Sep 17 00:00:00 2001 From: Guido van Rossum Date: Tue, 11 Feb 1992 14:45:43 +0000 Subject: standardized lay-out; new syntax. --- Demo/sgi/video/VFile.py | 141 ++++++++++++++++++++++++++---------------------- 1 file changed, 78 insertions(+), 63 deletions(-) diff --git a/Demo/sgi/video/VFile.py b/Demo/sgi/video/VFile.py index a0a578d..6d67543 100755 --- a/Demo/sgi/video/VFile.py +++ b/Demo/sgi/video/VFile.py @@ -9,12 +9,14 @@ import colorsys Error = 'VFile.Error' # Exception +MAXMAP = 4096 - 256 + def conv_grey(l,x,y): return colorsys.yiq_to_rgb(l,0,0) def conv_yiq (y,i,q): return colorsys.yiq_to_rgb(y, (i-0.5)*1.2, q-0.5) def conv_hls (l,h,s): return colorsys.hls_to_rgb(h,l,s) def conv_hsv (v,h,s): return colorsys.hsv_to_rgb(h,s,v) def conv_rgb (r,g,b): - raise Error, 'Attempt to make RGB colormap' + raise Error, 'Attempt to make RGB colormap' # Class VinFile represents a video file used for input. # @@ -35,6 +37,7 @@ def conv_rgb (r,g,b): # format # # These writable data members provide additional parametrization: +# magnify # xorigin, yorigin class VinFile(): @@ -43,7 +46,7 @@ class VinFile(): # init() raises whatever open() raises if the file can't be opened. def init(self, filename): - if filename = '-': + if filename == '-': return self.initfp(sys.stdin, filename) return self.initfp(open(filename, 'r'), filename) @@ -55,11 +58,11 @@ class VinFile(): self.filename = filename # line = self.fp.readline() - if line = 'CMIF video 1.0\n': + if line == 'CMIF video 1.0\n': self.version = 1.0 - elif line = 'CMIF video 2.0\n': + elif line == 'CMIF video 2.0\n': self.version = 2.0 - elif line = 'CMIF video 3.0\n': + elif line == 'CMIF video 3.0\n': self.version = 3.0 else: raise Error, self.filename + ': bad video format' @@ -69,47 +72,50 @@ class VinFile(): self.chrompack = 0 self.offset = 0 self.format = 'grey' - elif self.version = 2.0: + elif self.version == 2.0: line = self.fp.readline() try: self.c0bits, self.c1bits, self.c2bits, \ self.chrompack = eval(line[:-1]) if self.c1bits or self.c2bits: - self.format = 'yiq' + self.format = 'yiq' else: - self.format = 'grey' + self.format = 'grey' self.offset = 0 except: - raise Error, self.filename + ': bad 2.0 color info' - elif self.version = 3.0: + raise Error, \ + self.filename + ': bad 2.0 color info' + elif self.version == 3.0: line = self.fp.readline() try: - self.format, rest = eval(line[:-1]) - if self.format = 'rgb': - pass - elif self.format = 'grey': - self.offset = 0 - self.c0bits = rest - self.c1bits = self.c2bits = \ + self.format, rest = eval(line[:-1]) + if self.format == 'rgb': + pass + elif self.format == 'grey': + self.offset = 0 + self.c0bits = rest + self.c1bits = self.c2bits = \ self.chrompack = 0 - else: - self.c0bits,self.c1bits,self.c2bits,\ - self.chrompack,self.offset = rest + else: + self.c0bits,self.c1bits,self.c2bits,\ + self.chrompack,self.offset = rest except: - raise Error, self.filename + ': bad 3.0 color info' + raise Error, \ + self.filename + ': bad 3.0 color info' try: - self.convcolor = eval('conv_'+self.format) + self.convcolor = eval('conv_'+self.format) except: - raise Error, self.filename + ': unknown colorsys ' + self.format + raise Error, \ + self.filename + ': unknown colorsys ' + self.format # line = self.fp.readline() try: x = eval(line[:-1]) - if self.version > 1.0 or len(x) = 3: + if self.version > 1.0 or len(x) == 3: self.width, self.height, self.packfactor = x - if self.packfactor = 0: - self.format = 'rgb' + if self.packfactor == 0: + self.format = 'rgb' else: sef.width, self.height = x self.packfactor = 2 @@ -153,11 +159,10 @@ class VinFile(): def skipnextframedata(self, (size, chromsize)): # Note that this won't raise EOFError for a partial frame. try: - self.fp.seek(size + chromsize, 1) # Relatc1ve seek + self.fp.seek(size + chromsize, 1) # Relative seek except: # Assume it's a pipe -- read the data to discard it - dummy = self.fp.read(size) - dummy = self.fp.read(chromsize) + dummy = self.fp.read(size + chromsize) def getnextframeheader(self): line = self.fp.readline() @@ -169,11 +174,11 @@ class VinFile(): x = eval(line[:-1]) if type(x) in (type(0), type(0.0)): time = x - if pf = 0: + if pf == 0: size = w * h * 4 else: size = (w/pf) * (h/pf) - elif len(x) = 2: + elif len(x) == 2: time, size = x cp = self.chrompack if cp: @@ -221,70 +226,80 @@ class VinFile(): def initcolormap(self): self.colormapinited = 1 - if self.format = 'rgb': - gl.RGBmode() - gl.gconfig() - return - initcmap(self.convcolor, self.c0bits, self.c1bits, self.c2bits, self.chrompack, self.offset) + if self.format == 'rgb': + gl.RGBmode() + gl.gconfig() + return + gl.cmode() + gl.gconfig() + sys.stderr.write('Initializing color map...') + initcmap(self.convcolor, self.c0bits, self.c1bits, \ + self.c2bits, self.chrompack, self.offset) + sys.stderr.write(' Done.\n') if self.offset == 0: - gl.color(0x800) - self.mask = 0x7ff + gl.color(0x800) + self.mask = 0x7ff else: - self.mask = 0xfff + self.mask = 0xfff gl.clear() def initcmap(convcolor, c0bits, c1bits, c2bits, chrompack, offset): if c0bits+c1bits+c2bits > 11: raise Error, 'Sorry, 11 bits max' - import colorsys maxc0 = 1 << c0bits maxc1 = 1 << c1bits maxc2 = 1 << c2bits - if offset = 0: - offset = 2048 - rng = (offset, 4192-256) - for i in range(rng): + if offset == 0: + offset = 2048 + for i in range(offset, MAXMAP): gl.mapcolor(i, 0, 255, 0) for c0 in range(maxc0): c0v = c0/float(maxc0-1) for c1 in range(maxc1): - if maxc1 = 1: + if maxc1 == 1: c1v = 0 else: c1v = c1/float(maxc1-1) for c2 in range(maxc2): - if maxc2 = 1: + if maxc2 == 1: c2v = 0 else: c2v = c2/float(maxc2-1) index = offset + c0 + \ - (c1 << c0bits) + (c2 << (c0bits+c1bits)) + (c1< 0: + time.millisleep(dt) + vin.showframe(data, chromdata) + print 'Done.' + time.sleep(2) -- cgit v0.12