mirror of https://github.com/python/cpython
Support for CMIF video 3.0 files (more color systems).
This commit is contained in:
Guido van Rossum
parent
8f72bbb2c8
commit
444339d463
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@ -5,9 +5,16 @@
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import sys
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import gl
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import GL
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import colorsys
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Error = 'VFile.Error' # Exception
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def conv_grey(l,x,y): return colorsys.yiq_to_rgb(l,0,0)
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def conv_yiq (y,i,q): return colorsys.yiq_to_rgb(y, (i-0.5)*1.2, q-0.5)
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def conv_hls (l,h,s): return colorsys.hls_to_rgb(h,l,s)
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def conv_hsv (v,h,s): return colorsys.hsv_to_rgb(h,s,v)
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def conv_rgb (r,g,b):
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raise Error, 'Attempt to make RGB colormap'
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# Class VinFile represents a video file used for input.
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#
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@ -23,7 +30,9 @@ Error = 'VFile.Error' # Exception
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# filename
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# width, height
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# packfactor
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# ybits, ibits, qbits, chrompack
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# c0bits, c1bits, c2bits, chrompack
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# offset
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# format
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#
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# These writable data members provide additional parametrization:
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# xorigin, yorigin
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@ -50,25 +59,57 @@ class VinFile():
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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.ybits, self.ibits, self.qbits = 8, 0, 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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else:
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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.ybits, self.ibits, self.qbits, \
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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, self.filename + ': bad color info'
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raise Error, 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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pass
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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, 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, 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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@ -112,7 +153,7 @@ class VinFile():
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def skipnextframedata(self, (size, chromsize)):
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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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self.fp.seek(size + chromsize, 1) # Relatc1ve 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)
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@ -154,6 +195,8 @@ class VinFile():
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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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if not self.colormapinited:
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self.initcolormap()
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factor = self.magnify
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if pf: factor = factor * pf
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if chromdata:
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@ -162,15 +205,13 @@ class VinFile():
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ch = (h+cp-1)/cp
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gl.rectzoom(factor*cp, factor*cp)
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gl.pixmode(GL.PM_SIZE, 16)
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gl.writemask(0x7ff - ((1 << self.ybits) - 1))
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gl.writemask(self.mask - ((1 << self.c0bits) - 1))
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gl.lrectwrite(self.xorigin, self.yorigin, \
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self.xorigin + cw - 1, self.yorigin + ch - 1, \
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chromdata)
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#
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if pf:
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if not self.colormapinited:
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self.initcolormap()
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gl.writemask((1 << self.ybits) - 1)
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gl.writemask((1 << self.c0bits) - 1)
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gl.pixmode(GL.PM_SIZE, 8)
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gl.rectzoom(factor, factor)
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w = w/pf
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@ -179,36 +220,47 @@ class VinFile():
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self.xorigin + w - 1, self.yorigin + h - 1, data)
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def initcolormap(self):
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initcmap(self.ybits, self.ibits, self.qbits, self.chrompack)
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gl.color(0x800)
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gl.clear()
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self.colormapinited = 1
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if self.format = 'rgb':
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gl.RGBmode()
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gl.gconfig()
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return
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initcmap(self.convcolor, self.c0bits, self.c1bits, self.c2bits, self.chrompack, self.offset)
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if self.offset == 0:
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gl.color(0x800)
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self.mask = 0x7ff
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else:
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self.mask = 0xfff
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gl.clear()
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def initcmap(ybits, ibits, qbits, chrompack):
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if ybits+ibits+qbits > 11:
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def initcmap(convcolor, c0bits, c1bits, c2bits, chrompack, offset):
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if c0bits+c1bits+c2bits > 11:
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raise Error, 'Sorry, 11 bits max'
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import colorsys
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maxy = 1 << ybits
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maxi = 1 << ibits
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maxq = 1 << qbits
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for i in range(2048, 4096-256):
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maxc0 = 1 << c0bits
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maxc1 = 1 << c1bits
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maxc2 = 1 << c2bits
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if offset = 0:
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offset = 2048
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rng = (offset, 4192-256)
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for i in range(rng):
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gl.mapcolor(i, 0, 255, 0)
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for y in range(maxy):
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yv = y/float(maxy-1)
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for i in range(maxi):
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if maxi = 1:
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iv = 0
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for c0 in range(maxc0):
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c0v = c0/float(maxc0-1)
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for c1 in range(maxc1):
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if maxc1 = 1:
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c1v = 0
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else:
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iv = (i/float(maxi-1))-0.5
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for q in range(maxq):
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if maxq = 1:
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qv = 0
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c1v = c1/float(maxc1-1)
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for c2 in range(maxc2):
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if maxc2 = 1:
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c2v = 0
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else:
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qv = (q/float(maxq-1))-0.5
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index = 2048 + y + \
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(i << ybits) + (q << (ybits+ibits))
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rv, gv, bv = colorsys.yiq_to_rgb(yv, iv, qv)
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c2v = c2/float(maxc2-1)
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index = offset + c0 + \
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(c1 << c0bits) + (c2 << (c0bits+c1bits))
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rv, gv, bv = convcolor(c0v, c1v, c2v)
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r, g, b = \
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int(rv*255.0), int(gv*255.0), int(bv*255.0)
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if index < 4096 - 256:
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@ -220,6 +272,12 @@ def test():
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filename = 'film.video'
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if sys.argv[1:]: filename = sys.argv[1]
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vin = VinFile().init(filename)
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print 'Version: ', vin.version
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print 'Size: ', vin.width, 'x', vin.height
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print 'Pack: ', vin.packfactor, vin.chrompack
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print 'Bits: ', vin.c0bits, vin.c1bits, vin.c2bits
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print 'Format: ', vin.format
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print 'Offset: ', vin.offset
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gl.foreground()
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gl.prefsize(vin.width, vin.height)
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wid = gl.winopen('VFile.test: ' + filename)
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@ -228,3 +286,5 @@ def test():
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t = vin.shownextframe()
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except EOFError:
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pass
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import time
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time.sleep(5)
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