Added class VoutFile.
Added rgb8 support.
Added cache of frame offsets to VinFile.
Misc hacks to grab rgb8 data.
diff --git a/Demo/sgi/video/VFile.py b/Demo/sgi/video/VFile.py
index 6d67543..1711b4b 100755
--- a/Demo/sgi/video/VFile.py
+++ b/Demo/sgi/video/VFile.py
@@ -9,6 +9,9 @@
Error = 'VFile.Error' # Exception
+# Missing from GL.py:
+DMRGB = 0
+
MAXMAP = 4096 - 256
def conv_grey(l,x,y): return colorsys.yiq_to_rgb(l,0,0)
@@ -17,6 +20,12 @@
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'
+def conv_rgb8(rgb,d1,d2):
+ rgb = int(rgb*255.0)
+ r = (rgb >> 5) & 0x07
+ g = (rgb ) & 0x07
+ b = (rgb >> 3) & 0x03
+ return (r/7.0, g/7.0, b/3.0)
# Class VinFile represents a video file used for input.
#
@@ -39,6 +48,7 @@
# These writable data members provide additional parametrization:
# magnify
# xorigin, yorigin
+# fallback
class VinFile():
@@ -54,6 +64,8 @@
self.colormapinited = 0
self.magnify = 1.0
self.xorigin = self.yorigin = 0
+ self.fallback = 1
+ self.skipchrom = 0
self.fp = fp
self.filename = filename
#
@@ -90,7 +102,11 @@
try:
self.format, rest = eval(line[:-1])
if self.format == 'rgb':
- pass
+ self.offset = 0
+ self.c0bits = 0
+ self.c1bits = 0
+ self.c2bits = 0
+ self.chrompack = 0
elif self.format == 'grey':
self.offset = 0
self.c0bits = rest
@@ -121,9 +137,34 @@
self.packfactor = 2
except:
raise Error, self.filename + ': bad (w,h,pf) info'
+ self.frameno = 0
+ self.framecache = []
+ self.hascache = 0
#
return self
+ def warmcache(self):
+ if self.hascache: return
+ n = 0
+ try:
+ while 1:
+ void = self.skipnextframe()
+ n = n + 1
+ except EOFError:
+ pass
+ if not self.hascache:
+ raise Error, 'Cannot warm cache'
+
+
+ #
+ # getinfo returns all info pertaining to a film. The returned tuple
+ # can be passed to VoutFile.setinfo()
+ #
+ def getinfo(self):
+ return (self.format, self.width, self.height, self.packfactor,\
+ self.c0bits, self.c1bits, self.c2bits, self.offset, \
+ self.chrompack)
+
# rewind() raises Error if the header is bad (which can only
# happen if the file was written to since opened).
@@ -131,6 +172,11 @@
self.fp.seek(0)
x = self.initfp(self.fp, self.filename)
+ def position(self):
+ if self.frameno >= len(self.framecache):
+ raise EOFError
+ self.fp.seek(self.framecache[self.frameno][0])
+
# getnextframe() raises EOFError (built-in) if there is no next frame,
# or if the next frame is broken.
# So to getnextframeheader(), getnextframedata() and skipnextframe().
@@ -141,6 +187,9 @@
return time, data, chromdata
def getnextframedata(self, (size, chromsize)):
+ if self.hascache:
+ self.position()
+ self.frameno = self.frameno + 1
data = self.fp.read(size)
if len(data) <> size: raise EOFError
if chromsize:
@@ -157,6 +206,9 @@
return time
def skipnextframedata(self, (size, chromsize)):
+ if self.hascache:
+ self.frameno = self.frameno + 1
+ return
# Note that this won't raise EOFError for a partial frame.
try:
self.fp.seek(size + chromsize, 1) # Relative seek
@@ -165,8 +217,13 @@
dummy = self.fp.read(size + chromsize)
def getnextframeheader(self):
+ if self.hascache:
+ if self.frameno >= len(self.framecache):
+ raise EOFError
+ return self.framecache[self.frameno][1]
line = self.fp.readline()
if not line:
+ self.hascache = 1
raise EOFError
#
w, h, pf = self.width, self.height, self.packfactor
@@ -191,6 +248,8 @@
time, size, chromsize = x
except:
raise Error, self.filename + ': bad frame header'
+ cdata = (self.fp.tell(), (time, size, chromsize))
+ self.framecache.append(cdata)
return time, size, chromsize
def shownextframe(self):
@@ -204,7 +263,7 @@
self.initcolormap()
factor = self.magnify
if pf: factor = factor * pf
- if chromdata:
+ if chromdata and not self.skipchrom:
cp = self.chrompack
cw = (w+cp-1)/cp
ch = (h+cp-1)/cp
@@ -232,49 +291,188 @@
return
gl.cmode()
gl.gconfig()
+ self.skipchrom = 0
sys.stderr.write('Initializing color map...')
- initcmap(self.convcolor, self.c0bits, self.c1bits, \
- self.c2bits, self.chrompack, self.offset)
+ self.initcmap()
sys.stderr.write(' Done.\n')
if self.offset == 0:
gl.color(0x800)
+ gl.clear()
self.mask = 0x7ff
else:
self.mask = 0xfff
gl.clear()
-def initcmap(convcolor, c0bits, c1bits, c2bits, chrompack, offset):
- if c0bits+c1bits+c2bits > 11:
- raise Error, 'Sorry, 11 bits max'
- maxc0 = 1 << c0bits
- maxc1 = 1 << c1bits
- maxc2 = 1 << c2bits
- 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:
- c1v = 0
+ def initcmap(self):
+ maxbits = gl.getgdesc(GL.GD_BITS_NORM_SNG_CMODE)
+ if maxbits > 11:
+ maxbits = 11
+ c0bits, c1bits, c2bits = self.c0bits, self.c1bits, self.c2bits
+ if c0bits+c1bits+c2bits > maxbits:
+ if self.fallback and c0bits < maxbits:
+ # Cannot display film in this mode, use mono
+ self.skipchrom = 1
+ c1bits = c2bits = 0
+ self.convcolor = conv_grey
else:
- c1v = c1/float(maxc1-1)
- for c2 in range(maxc2):
- if maxc2 == 1:
- c2v = 0
+ raise Error, 'Sorry, '+`maxbits`+ \
+ ' bits max on this machine'
+ maxc0 = 1 << c0bits
+ maxc1 = 1 << c1bits
+ maxc2 = 1 << c2bits
+ if self.offset == 0 and maxbits == 11:
+ offset = 2048
+ else:
+ offset = self.offset
+ if maxbits <> 11:
+ offset = offset & ((1<<maxbits)-1)
+ #for i in range(512, MAXMAP):
+ # gl.mapcolor(i, 0, 0, 0)
+ #void = gl.qtest() # Should be gl.gflush()
+ for c0 in range(maxc0):
+ c0v = c0/float(maxc0-1)
+ for c1 in range(maxc1):
+ if maxc1 == 1:
+ c1v = 0
else:
- c2v = c2/float(maxc2-1)
- index = offset + c0 + \
- (c1<<c0bits) + (c2 << (c0bits+c1bits))
- rv, gv, bv = convcolor(c0v, c1v, c2v)
- r, g, b = \
- int(rv*255.0), int(gv*255.0), int(bv*255.0)
- if index < MAXMAP:
- gl.mapcolor(index, r, g, b)
+ c1v = c1/float(maxc1-1)
+ for c2 in range(maxc2):
+ if maxc2 == 1:
+ c2v = 0
+ else:
+ c2v = c2/float(maxc2-1)
+ index = offset + c0 + (c1<<c0bits) + \
+ (c2 << (c0bits+c1bits))
+ rv, gv, bv = self.convcolor( \
+ c0v, c1v, c2v)
+ r, g, b = int(rv*255.0), \
+ int(gv*255.0), int(bv*255.0)
+ if index < MAXMAP:
+ gl.mapcolor(index, r, g, b)
+ void = gl.gflush()
+#
+# A set of routines to grab images from windows
+#
+def grab_rgb(w, h, pf):
+ if gl.getdisplaymode() <> DMRGB:
+ raise Error, 'Sorry, can only grab rgb in single-buf rgbmode'
+ if pf <> 1 and pf <> 0:
+ raise Error, 'Sorry, only grab with packfactor=1'
+ return gl.lrectread(0, 0, w-1, h-1), None
+
+def grab_rgb8(w, h, pf):
+ if gl.getdisplaymode() <> DMRGB:
+ raise Error, 'Sorry, can only grab rgb in single-buf rgbmode'
+ if pf <> 1 and pf <> 0:
+ raise Error, 'Sorry, can only grab with packfactor=1'
+ r = gl.getgdesc(GL.GD_BITS_NORM_SNG_RED)
+ g = gl.getgdesc(GL.GD_BITS_NORM_SNG_GREEN)
+ b = gl.getgdesc(GL.GD_BITS_NORM_SNG_BLUE)
+ if (r,g,b) <> (3,3,2):
+ raise Error, 'Sorry, can only grab rgb8 on 8-bit Indigo'
+ # Dirty Dirty here. Set buffer to cmap mode, grab image and set it back
+ gl.cmode()
+ gl.gconfig()
+ gl.pixmode(GL.PM_SIZE, 8)
+ data = gl.lrectread(0, 0, w-1, h-1)
+ data = data[:w*h] # BUG FIX for python lrectread
+ gl.RGBmode()
+ gl.gconfig()
+ gl.pixmode(GL.PM_SIZE, 32)
+ return data, None
+
+def grab_grey(w, h, pf):
+ raise Error, 'Sorry, grabbing grey not implemented'
+def grab_yiq(w, h, pf):
+ raise Error, 'Sorry, grabbing yiq not implemented'
+
+def grab_hls(w, h, pf):
+ raise Error, 'Sorry, grabbing hls not implemented'
+
+def grab_hsv(w, h, pf):
+ raise Error, 'Sorry, grabbing hsv not implemented'
+
+#
+# The class VoutFile is not as well-designed (and tested) as VinFile.
+# Notably it will accept almost any garbage and write it to the video
+# output file
+#
+class VoutFile():
+ def init(self, filename):
+ if filename == '-':
+ return self.initfp(sys.stdout, filename)
+ else:
+ return self.initfp(open(filename,'w'), filename)
+
+ def initfp(self, fp, filename):
+ self.fp = fp
+ self.format = 'grey'
+ self.width = self.height = 0
+ self.packfactor = 1
+ self.c0bits = 8
+ self.c1bits = self.c2bits = 0
+ self.offset = 0
+ self.chrompack = 0
+ self.headerwritten = 0
+ return self
+
+ def close(self):
+ self.fp.close()
+ self.initfp(None, None)
+
+ def setinfo(self, values):
+ self.format, self.width, self.height, self.packfactor,\
+ self.c0bits, self.c1bits, self.c2bits, self.offset, \
+ self.chrompack = values
+
+ def writeheader(self):
+ self.headerwritten = 1
+ if self.format == 'rgb':
+ self.packfactor = 0
+ elif self.packfactor == 0:
+ self.packfactor = 1
+ self.fp.write('CMIF video 3.0\n')
+ if self.format == 'rgb':
+ data = ('rgb', 0)
+ elif self.format == 'grey':
+ data = ('grey', 0)
+ else:
+ data = (self.format, (self.c0bits, self.c1bits, \
+ self.c2bits, self.chrompack, self.offset))
+ self.fp.write(`data`+'\n')
+ data = (self.width, self.height, self.packfactor)
+ self.fp.write(`data`+'\n')
+ try:
+ self._grabber = eval('grab_' + self.format)
+ except:
+ raise Error, 'unknown colorsys: ' + self.format
+
+ def writeframeheader(self, data):
+ if not self.headerwritten:
+ raise Error, 'Writing frame data before header'
+ # XXXX Should we sanity check here?
+ self.fp.write(`data`+'\n')
+
+ def writeframedata(self, data, chromdata):
+ # XXXX Check sizes here
+ self.fp.write(data)
+ if chromdata:
+ self.fp.write(chromdata)
+
+ def writeframe(self, time, data, chromdata):
+ if chromdata:
+ clen = len(chromdata)
+ else:
+ clen = 0
+ self.writeframeheader((time, len(data), clen))
+ self.writeframedata(data, chromdata)
+
+ def grabframe(self):
+ return self._grabber(self.width, self.height, self.packfactor)
+
def test():
import sys, time
filename = 'film.video'
@@ -303,3 +501,4 @@
vin.showframe(data, chromdata)
print 'Done.'
time.sleep(2)
+