diff options
| -rwxr-xr-x | Demo/sgi/video/LiveVideoIn.py | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/Demo/sgi/video/LiveVideoIn.py b/Demo/sgi/video/LiveVideoIn.py index 47fae67..4e000b1 100755 --- a/Demo/sgi/video/LiveVideoIn.py +++ b/Demo/sgi/video/LiveVideoIn.py @@ -54,7 +54,7 @@ class LiveVideoIn: # Initialize capture (mode, self.realwidth, self.realheight, qsize, rate) = \ v.InitContinuousCapture(SV.RGB8_FRAMES, \ - self.realwidth, self.realheight, 1, 5) + self.realwidth, self.realheight, 1, 2) self.width = vw self.height = vh self.x0 = (self.realwidth-self.width)/2 @@ -62,8 +62,8 @@ class LiveVideoIn: self.y0 = (self.realheight-self.height)/2 self.y1 = self.y0 + self.height - 1 # Compute # full lines per packet - self.lpp = pktmax / self.width - self.pktsize = self.lpp*self.width + self.lpp = pktmax / self.linewidth() + self.pktsize = self.lpp*self.linewidth() self.data = None self.dataoffset = 0 self.lpos = 0 @@ -86,6 +86,17 @@ class LiveVideoIn: def close(self): v.EndContinuousCapture() + # Get the length in bytes of a video line + def linewidth(self): + if self.type == 'mono': + return (self.width+7)/8 + elif self.type == 'grey2': + return (self.width+3)/4 + elif self.type == 'grey4': + return (self.width+1)/2 + else: + return self.width + # Get the next video packet. # This returns (lpos, data) where: # - lpos is the line position @@ -125,12 +136,5 @@ class LiveVideoIn: data = self.data[self.dataoffset:self.dataoffset+self.pktsize] lpos = self.lpos self.dataoffset = self.dataoffset + self.pktsize - if self.type == 'mono': - self.lpos = self.lpos + self.lpp*8 - elif self.type == 'grey2': - self.lpos = self.lpos + self.lpp*4 - elif self.type == 'grey4': - self.lpos = self.lpos + self.lpp*2 - else: - self.lpos = self.lpos + self.lpp + self.lpos = self.lpos + self.lpp return lpos, data |