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508 lines
13 KiB
Python
Executable file
508 lines
13 KiB
Python
Executable file
# VFile -- two classes for Video Files.
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# VinFile -- for video input.
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# VoutFile -- for video output.
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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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# Missing from GL.py:
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DMRGB = 0
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MAXMAP = 4096 - 256
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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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def conv_rgb8(rgb,d1,d2):
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rgb = int(rgb*255.0)
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r = (rgb >> 5) & 0x07
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g = (rgb ) & 0x07
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b = (rgb >> 3) & 0x03
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return (r/7.0, g/7.0, b/3.0)
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# Class VinFile represents a video file used for input.
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#
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# It has the following methods:
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# init(filename)
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# initfp(fp, filename)
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# rewind()
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# getframe()
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# skipframe()
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#
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# The following read-only data members provide public information:
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# version
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# filename
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# width, height
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# packfactor
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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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# magnify
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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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#
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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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#
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# getinfo returns all info pertaining to a film. The returned tuple
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# can be passed to VoutFile.setinfo()
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#
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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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# rewind() raises Error if the header is bad (which can only
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# happen if the file was written to since opened).
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def rewind(self):
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self.fp.seek(0)
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x = self.initfp(self.fp, self.filename)
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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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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 and not self.skipchrom:
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cp = self.chrompack
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cw = (w+cp-1)/cp
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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(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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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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h = h/pf
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gl.lrectwrite(self.xorigin, self.yorigin, \
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self.xorigin + w - 1, self.yorigin + h - 1, data)
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def initcolormap(self):
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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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gl.cmode()
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gl.gconfig()
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self.skipchrom = 0
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sys.stderr.write('Initializing color map...')
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self.initcmap()
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sys.stderr.write(' Done.\n')
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if self.offset == 0:
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gl.color(0x800)
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gl.clear()
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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(self):
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maxbits = gl.getgdesc(GL.GD_BITS_NORM_SNG_CMODE)
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if maxbits > 11:
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maxbits = 11
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c0bits, c1bits, c2bits = self.c0bits, self.c1bits, self.c2bits
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if c0bits+c1bits+c2bits > maxbits:
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if self.fallback and c0bits < maxbits:
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# Cannot display film in this mode, use mono
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self.skipchrom = 1
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c1bits = c2bits = 0
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self.convcolor = conv_grey
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else:
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raise Error, 'Sorry, '+`maxbits`+ \
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' bits max on this machine'
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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 self.offset == 0 and maxbits == 11:
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offset = 2048
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else:
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offset = self.offset
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if maxbits <> 11:
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offset = offset & ((1<<maxbits)-1)
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#for i in range(512, MAXMAP):
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# gl.mapcolor(i, 0, 0, 0)
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#void = gl.qtest() # Should be gl.gflush()
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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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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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c2v = c2/float(maxc2-1)
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index = offset + c0 + (c1<<c0bits) + \
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(c2 << (c0bits+c1bits))
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rv, gv, bv = self.convcolor( \
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c0v, c1v, c2v)
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r, g, b = int(rv*255.0), \
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int(gv*255.0), int(bv*255.0)
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if index < MAXMAP:
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gl.mapcolor(index, r, g, b)
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void = gl.gflush()
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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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def grab_rgb(w, h, pf):
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if gl.getdisplaymode() <> DMRGB:
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raise Error, 'Sorry, can only grab rgb in single-buf rgbmode'
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if pf <> 1 and pf <> 0:
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raise Error, 'Sorry, only grab with packfactor=1'
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return gl.lrectread(0, 0, w-1, h-1), None
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def grab_rgb8(w, h, pf):
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if gl.getdisplaymode() <> DMRGB:
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raise Error, 'Sorry, can only grab rgb in single-buf rgbmode'
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if pf <> 1 and pf <> 0:
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raise Error, 'Sorry, can only grab with packfactor=1'
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r = gl.getgdesc(GL.GD_BITS_NORM_SNG_RED)
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g = gl.getgdesc(GL.GD_BITS_NORM_SNG_GREEN)
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b = gl.getgdesc(GL.GD_BITS_NORM_SNG_BLUE)
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if (r,g,b) <> (3,3,2):
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raise Error, 'Sorry, can only grab rgb8 on 8-bit Indigo'
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# Dirty Dirty here. Set buffer to cmap mode, grab image and set it back
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gl.cmode()
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gl.gconfig()
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gl.pixmode(GL.PM_SIZE, 8)
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data = gl.lrectread(0, 0, w-1, h-1)
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data = data[:w*h] # BUG FIX for python lrectread
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gl.RGBmode()
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gl.gconfig()
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gl.pixmode(GL.PM_SIZE, 32)
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return data, None
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def grab_grey(w, h, pf):
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raise Error, 'Sorry, grabbing grey not implemented'
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def grab_yiq(w, h, pf):
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raise Error, 'Sorry, grabbing yiq not implemented'
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def grab_hls(w, h, pf):
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raise Error, 'Sorry, grabbing hls not implemented'
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def grab_hsv(w, h, pf):
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raise Error, 'Sorry, grabbing hsv not implemented'
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#
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# The class VoutFile is not as well-designed (and tested) as VinFile.
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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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def init(self, filename):
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if filename == '-':
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return self.initfp(sys.stdout, filename)
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else:
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return self.initfp(open(filename,'w'), filename)
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def initfp(self, fp, filename):
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self.fp = fp
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self.format = 'grey'
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self.width = self.height = 0
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self.packfactor = 1
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self.c0bits = 8
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self.c1bits = self.c2bits = 0
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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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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 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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def writeheader(self):
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self.headerwritten = 1
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if self.format == 'rgb':
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self.packfactor = 0
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elif self.packfactor == 0:
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self.packfactor = 1
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self.fp.write('CMIF video 3.0\n')
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if self.format == 'rgb':
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data = ('rgb', 0)
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elif self.format == 'grey':
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data = ('grey', 0)
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else:
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data = (self.format, (self.c0bits, self.c1bits, \
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self.c2bits, self.chrompack, self.offset))
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self.fp.write(`data`+'\n')
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data = (self.width, self.height, self.packfactor)
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self.fp.write(`data`+'\n')
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try:
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self._grabber = eval('grab_' + self.format)
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except:
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raise Error, 'unknown colorsys: ' + self.format
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def writeframeheader(self, data):
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if not self.headerwritten:
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raise Error, 'Writing frame data before header'
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# XXXX Should we sanity check here?
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self.fp.write(`data`+'\n')
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def writeframedata(self, data, chromdata):
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# XXXX Check sizes here
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self.fp.write(data)
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if chromdata:
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self.fp.write(chromdata)
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def writeframe(self, time, data, chromdata):
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if chromdata:
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clen = len(chromdata)
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else:
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clen = 0
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self.writeframeheader((time, len(data), clen))
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self.writeframedata(data, chromdata)
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def grabframe(self):
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return self._grabber(self.width, self.height, self.packfactor)
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def test():
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import sys, time
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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 'File: ', 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, '; chrom:', 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(filename)
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vin.initcolormap()
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t0 = time.millitimer()
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while 1:
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try:
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t, data, chromdata = vin.getnextframe()
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except EOFError:
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break
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dt = t + t0 - time.millitimer()
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if dt > 0:
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time.millisleep(dt)
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vin.showframe(data, chromdata)
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print 'Done.'
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time.sleep(2)
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