mirror of https://github.com/python/cpython
All combinations of video format and capture mode (cont/burst) now
work. Reorganized a lot of the code, still not satisfied...
This commit is contained in:
Guido van Rossum
parent
e17c6c355a
commit
bc6d3c37d1
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@ -2,6 +2,8 @@
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# Video bag-of-tricks
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# XXX To do: audio; rationalize user interface; ...?
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import sys
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import getopt
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import string
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@ -33,9 +35,10 @@ def main():
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StopCapture = 'StopCapture'
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formats = ['rgb8', 'grey8', 'grey4', 'grey2', \
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'grey2_dith', 'mono_dith', 'mono_thresh']
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formatmap = {'rgb24': 'rgb', 'grey8': 'grey'}
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Labels = ['rgb8', 'grey8', 'grey4', 'grey2', \
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'grey2 dith', 'mono dith', 'mono thresh']
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Formats = ['rgb8', 'grey', 'grey4', 'grey2', \
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'grey2', 'mono', 'mono']
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class VideoBagOfTricks:
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@ -53,22 +56,13 @@ class VideoBagOfTricks:
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fl.set_event_call_back(self.do_event)
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return self
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def setwatch(self):
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gl.winset(self.form.window)
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gl.setcursor(WATCH, 0, 0)
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def setarrow(self):
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gl.winset(self.form.window)
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gl.setcursor(ARROW, 0, 0)
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def setdefaults(self):
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self.mono_thresh = 128
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self.format = 'rgb8'
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self.c_format.clear_choice()
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for label in formats:
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for label in Labels:
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self.c_format.addto_choice(label)
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self.c_format.set_choice(1 + formats.index(self.format))
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self.mono_thresh = 128
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self.mono_use_thresh = 0
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self.get_format()
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self.b_drop.set_button(1)
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self.b_burst.set_button(0)
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self.in_rate.set_input('2')
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@ -77,9 +71,14 @@ class VideoBagOfTricks:
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self.in_file.set_input('film.video')
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def openvideo(self):
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self.video = sv.OpenVideo()
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param = [SV.BROADCAST, 0]
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self.video.GetParam(param)
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try:
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self.video = sv.OpenVideo()
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except sv.error, msg:
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print 'Error opening video:', msg
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self.video = None
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#sys.exit(1)
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param = [SV.BROADCAST, SV.PAL]
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if self.video: self.video.GetParam(param)
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if param[1] == SV.PAL:
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x = SV.PAL_XMAX
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y = SV.PAL_YMAX
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@ -118,9 +117,12 @@ class VideoBagOfTricks:
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def settitle(self):
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gl.winset(self.window)
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gl.wintitle(self.maketitle())
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x, y = gl.getsize()
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title = 'Vb:' + self.in_file.get_input() + ' (%dx%d)' % (x, y)
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gl.wintitle(title)
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def bindvideo(self):
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if not self.video: return
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x, y = gl.getsize()
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self.video.SetSize(x, y)
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drop = self.b_drop.get_button()
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@ -128,7 +130,7 @@ class VideoBagOfTricks:
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param = [SV.FIELDDROP, 1, SV.GENLOCK, SV.GENLOCK_OFF]
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else:
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param = [SV.FIELDDROP, 0, SV.GENLOCK, SV.GENLOCK_ON]
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if self.getformat()[:3] == 'rgb':
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if self.rgb:
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param = param+[SV.COLOR, SV.DEFAULT_COLOR, \
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SV.DITHER, 1, \
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SV.INPUT_BYPASS, 0]
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@ -150,35 +152,47 @@ class VideoBagOfTricks:
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self.rebindvideo()
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self.settitle()
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def cb_format(self, *args):
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def get_format(self):
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i = self.c_format.get_choice()
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label = format = formats[i-1]
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if '_' in format:
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i = string.find(format, '_')
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format = format[:i]
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if formatmap.has_key(format):
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format = formatmap[format]
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label = Labels[i-1]
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format = Formats[i-1]
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self.format = format
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#
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if label == 'mono_thresh':
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self.mono_use_thresh = 1
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self.rgb = (format[:3] == 'rgb')
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self.mono = (format == 'mono')
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self.grey = (format[:4] == 'grey')
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self.mono_use_thresh = (label == 'mono thresh')
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s = format[4:]
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if s:
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self.greybits = string.atoi(s)
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else:
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self.greybits = 8
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if label == 'grey2 dith':
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self.greybits = -2
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#
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convertor = None
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if self.grey:
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if self.greybits == 2:
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convertor = imageop.grey2grey2
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elif self.greybits == 4:
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convertor = imageop.grey2grey4
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elif self.greybits == -2:
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convertor = imageop.dither2grey2
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self.convertor = convertor
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def cb_format(self, *args):
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self.get_format()
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if self.mono_use_thresh:
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s = `self.mono_thresh`
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s = fl.show_input('Please enter mono threshold', s)
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if s:
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try:
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self.mono_thresh = string.atoi(s)
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except string.atoi_error:
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fl.show_message( \
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'Bad input, using ' + \
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`self.mono_thresh`)
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else:
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self.mono_use_thresh = 0
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#
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fl.show_message('Bad input, using', \
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`self.mono_thresh`, '')
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self.rebindvideo()
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def getformat(self):
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return self.format
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def cb_rate(self, *args):
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pass
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@ -222,39 +236,103 @@ class VideoBagOfTricks:
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gl.ringbell()
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def cb_capture(self, *args):
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if not self.video:
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gl.ringbell()
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return
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if self.b_burst.get_button():
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self.burst_capture()
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else:
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self.cont_capture()
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def burst_capture(self):
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self.setwatch()
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self.g_main.hide_object()
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self.cb_file() # Make sure filename is OK
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filename = self.in_file.get_input()
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format = self.getformat()
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vout = VFile.VoutFile().init(filename)
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vout.setformat(format)
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gl.winset(self.window)
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x, y = gl.getsize()
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vout.setsize(x, y)
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vout.writeheader()
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convertor = None
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if format[:4] == 'grey':
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s = format[4:]
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if s:
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greybits = string.atoi(s)
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else:
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greybits = 8
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# XXX Should get this from somewhere else?
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if greybits == 2:
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convertor = imageop.grey2grey2
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elif greybits == 4:
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convertor = imageop.grey2grey4
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elif greybits == -2:
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convertor = imageop.dither2grey2
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mono = (format == 'mono')
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vformat = SV.RGB8_FRAMES
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qsize = 0
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rate = eval(self.in_rate.get_input())
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try:
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nframes = string.atoi(self.in_nframes.get_input())
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except string.atoi_error:
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nframes = 0
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if nframes == 0:
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try:
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maxmem = \
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float(eval(self.in_maxmem.get_input()))
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except:
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maxmem = 1.0
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memsize = int(maxmem * 1024 * 1024)
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nframes = calcnframes(x, y, \
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self.mono or self.grey, memsize)
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print 'nframes =', nframes
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rate = string.atoi(self.in_rate.get_input())
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# XXX Should check ranges and not crash if non-integer
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info = (vformat, x, y, nframes, rate)
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try:
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info2, data, bitvec = self.video.CaptureBurst(info)
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except sv.error, msg:
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fl.show_message('Capture error:', str(msg), '')
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self.setarrow()
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return
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print info2
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self.save_burst(info2, data, bitvec)
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self.setarrow()
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def save_burst(self, info, data, bitvec):
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(vformat, x, y, nframes, rate) = info
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self.open_file()
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fieldsize = x*y/2
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nskipped = 0
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realframeno = 0
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tpf = 1000 / 50.0 #XXXX
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# Trying to find the pattern in frame skipping
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okstretch = 0
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skipstretch = 0
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for frameno in range(0, nframes*2):
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if frameno <> 0 and \
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bitvec[frameno] == bitvec[frameno-1]:
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nskipped = nskipped + 1
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if okstretch:
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#print okstretch, 'ok',
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okstretch = 0
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skipstretch = skipstretch + 1
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continue
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if skipstretch:
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#print skipstretch, 'skipped'
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skipstretch = 0
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okstretch = okstretch + 1
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#
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# Save field.
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# XXXX Works only for fields and top-to-bottom
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#
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start = frameno*fieldsize
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field = data[start:start+fieldsize]
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realframeno = realframeno + 1
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fn = int(realframeno*tpf)
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if not self.write_frame(fn, field):
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break
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#print okstretch, 'ok',
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#print skipstretch, 'skipped'
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#print 'Skipped', nskipped, 'duplicate frames'
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self.close_file()
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def cont_capture(self):
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self.setwatch()
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self.g_main.hide_object()
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self.open_file()
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vformat = SV.RGB8_FRAMES
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qsize = 1 # XXX Should be an option?
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try:
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rate = string.atoi(self.in_rate.get_input())
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except string.atoi_error:
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rate = 2
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x, y = self.vout.getsize()
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info = (vformat, x, y, qsize, rate)
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ids = []
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tpf = 50
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self.video.InitContinuousCapture(info)
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fps = 59.64 # Fields per second
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# XXX (fps of Indigo monitor, not of PAL or NTSC!)
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tpf = 1000.0 / fps # Time per field in msec
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info2 = self.video.InitContinuousCapture(info)
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if info2 <> info:
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print 'Info mismatch: requested', info, 'got', info2
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self.capturing = 1
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self.g_stop.show_object()
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self.setarrow()
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@ -273,37 +351,75 @@ class VideoBagOfTricks:
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data = cd.InterleaveFields(1)
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cd.UnlockCaptureData()
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t = id*tpf
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if convertor:
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data = convertor(data, len(data), 1)
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elif mono:
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if self.mono_use_thresh:
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data = imageop.grey2mono(data, \
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len(data), 1,\
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self.mono_thresh)
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else:
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data = imageop.dither2mono(data, \
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len(data), 1)
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try:
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vout.writeframe(t, data, None)
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except IOError, msg:
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if msg == (0, 'Error 0'):
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msg = 'disk full??'
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fl.show_message('IOError: ' + str(msg))
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if not self.write_frame(t, data):
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break
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self.setwatch()
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self.g_stop.hide_object()
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self.capturing = 0
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vout.close()
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self.video.EndContinuousCapture()
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self.close_file()
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self.g_main.show_object()
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self.setarrow()
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def open_file(self):
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gl.winset(self.window)
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x, y = gl.getsize()
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self.cb_file() # Make sure filename is OK
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filename = self.in_file.get_input()
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vout = VFile.VoutFile().init(filename)
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vout.setformat(self.format)
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vout.setsize(x, y)
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if self.b_burst.get_button():
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vout.setpf((1, -2))
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vout.writeheader()
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self.vout = vout
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def close_file(self):
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try:
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self.vout.close()
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except IOError, msg:
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if msg == (0, 'Error 0'):
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msg = 'disk full??'
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fl.show_message('IOError', str(msg), '')
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del self.vout
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def write_frame(self, t, data):
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if self.convertor:
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data = self.convertor(data, len(data), 1)
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elif self.mono:
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if self.mono_use_thresh:
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data = imageop.grey2mono(data, \
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len(data), 1,\
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self.mono_thresh)
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else:
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data = imageop.dither2mono(data, \
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len(data), 1)
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try:
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self.vout.writeframe(t, data, None)
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except IOError, msg:
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if msg == (0, 'Error 0'):
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msg = 'disk full??'
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fl.show_message('IOError', str(msg), '')
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return 0
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return 1
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def cb_quit(self, *args):
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raise SystemExit, 0
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def maketitle(self):
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x, y = gl.getsize()
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return 'Vb:' + self.in_file.get_input() + ' (%dx%d)' % (x, y)
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def setwatch(self):
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gl.winset(self.form.window)
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gl.setcursor(WATCH, 0, 0)
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def setarrow(self):
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gl.winset(self.form.window)
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gl.setcursor(ARROW, 0, 0)
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def calcnframes(x, y, grey, memsize):
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pixels = x*y
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pixels = pixels/2 # XXX always assume fields
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if grey: n = memsize/pixels
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else: n = memsize/(4*pixels)
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return max(1, n)
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try:
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main()
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