From 5d69a524f81f234b3fbc41d49ba18d6f6886baba Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 3 Aug 2006 04:51:51 +0000
Subject: Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/usrp/usrp_tv_rcv_nogui.py | 179 +++++++++++++++++++++
1 file changed, 179 insertions(+)
create mode 100755 gnuradio-examples/python/usrp/usrp_tv_rcv_nogui.py
(limited to 'gnuradio-examples/python/usrp/usrp_tv_rcv_nogui.py')
diff --git a/gnuradio-examples/python/usrp/usrp_tv_rcv_nogui.py b/gnuradio-examples/python/usrp/usrp_tv_rcv_nogui.py
new file mode 100755
index 0000000000..e563188b9c
--- /dev/null
+++ b/gnuradio-examples/python/usrp/usrp_tv_rcv_nogui.py
@@ -0,0 +1,179 @@
+#!/usr/bin/env python
+
+"""
+Reads from a file and generates PAL TV pictures in black and white
+which can be displayed using ImageMagick or realtime using gr-video-sdl
+(To capture the input file Use usrp_rx_file.py, or use usrp_rx_cfile.py --output-shorts if you have a recent enough usrp_rx_cfile.py)
+Can also use usrp directly as capture source, but then you need a higher decimation factor (64)
+and thus get a lower horizontal resulution.
+There is no synchronisation yet. The sync blocks are in development but not yet in cvs.
+
+"""
+
+from gnuradio import gr, eng_notation
+from gnuradio import audio
+from gnuradio import usrp
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import sys
+
+try:
+ from gnuradio import video_sdl
+except:
+ print "FYI: gr-video-sdl is not installed"
+ print "realtime \"sdl\" video output window will not be available"
+
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ usage="%prog: [options] output_filename. \n Special output_filename \"sdl\" will use video_sink_sdl as realtime output window. " \
+ "You then need to have gr-video-sdl installed. \n" \
+ "Make sure your input capture file containes interleaved shorts not complex floats"
+ parser = OptionParser(option_class=eng_option, usage=usage)
+ parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
+ help="select USRP Rx side A or B (default=A)")
+ parser.add_option("-c", "--contrast", type="eng_float", default=1.0,
+ help="set contrast (default is 1.0)")
+ parser.add_option("-b", "--brightness", type="eng_float", default=0.0,
+ help="set brightness (default is 0)")
+ parser.add_option("-d", "--decim", type="int", default=8,
+ help="set fgpa decimation rate to DECIM [default=%default]")
+ parser.add_option("-i", "--in-filename", type="string", default=None,
+ help="Use input file as source. samples must be interleaved shorts \n " +
+ "Use usrp_rx_file.py or usrp_rx_cfile.py --output-shorts. \n"
+ "Special name \"usrp\" results in realtime capturing and processing using usrp. \n" +
+ "You then probably need a decimation factor of 64 or higher.")
+ parser.add_option("-f", "--freq", type="eng_float", default=None,
+ help="set frequency to FREQ.\nNote that the frequency of the video carrier is not at the middle of the TV channel", metavar="FREQ")
+ parser.add_option("-g", "--gain", type="eng_float", default=None,
+ help="set gain in dB (default is midpoint)")
+ parser.add_option("-p", "--pal", action="store_true", default=False,
+ help="PAL video format (this is the default)")
+ parser.add_option("-n", "--ntsc", action="store_true", default=False,
+ help="NTSC video format")
+ parser.add_option("-r", "--repeat", action="store_false", default=True,
+ help="repeat in_file in a loop")
+ parser.add_option("-8", "--width-8", action="store_true", default=False,
+ help="Enable 8-bit samples across USB")
+ parser.add_option("-N", "--nframes", type="eng_float", default=None,
+ help="number of frames to collect [default=+inf]")
+ parser.add_option( "--no-hb", action="store_true", default=False,
+ help="don't use halfband filter in usrp")
+ (options, args) = parser.parse_args ()
+ if not (len(args) == 1):
+ parser.print_help()
+ sys.stderr.write('You must specify the output. FILENAME or sdl \n');
+ sys.exit(1)
+
+ filename = args[0]
+
+ if options.in_filename is None:
+ parser.print_help()
+ sys.stderr.write('You must specify the input -i FILENAME or -i usrp\n');
+ raise SystemExit, 1
+
+ if not (filename=="sdl"):
+ options.repeat=False
+
+ if not (options.in_filename=="usrp"):
+ self.filesource = gr.file_source(gr.sizeof_short,options.in_filename,options.repeat) # file is data source, capture with usr_rx_csfile.py
+ self.istoc = gr.interleaved_short_to_complex()
+ self.connect(self.filesource,self.istoc)
+ self.adc_rate=64e6
+ self.src=self.istoc
+ else:
+ if options.freq is None:
+ parser.print_help()
+ sys.stderr.write('You must specify the frequency with -f FREQ\n');
+ raise SystemExit, 1
+ if abs(options.freq) < 1e6:
+ options.freq *= 1e6
+ if options.no_hb or (options.decim<8):
+ self.fpga_filename="std_4rx_0tx.rbf" #contains 4 Rx paths without halfbands and 0 tx paths
+ else:
+ self.fpga_filename="std_2rxhb_2tx.rbf" # contains 2 Rx paths with halfband filters and 2 tx paths (the default)
+
+ # build the graph
+ self.u = usrp.source_c(decim_rate=options.decim,fpga_filename=self.fpga_filename)
+ self.src=self.u
+ if options.width_8:
+ sample_width = 8
+ sample_shift = 8
+ format = self.u.make_format(sample_width, sample_shift)
+ r = self.u.set_format(format)
+ self.adc_rate=self.u.adc_freq()
+ if options.rx_subdev_spec is None:
+ options.rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
+ self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
+ # determine the daughterboard subdevice we're using
+ self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
+ print "Using RX d'board %s" % (self.subdev.side_and_name(),)
+
+ if options.gain is None:
+ # if no gain was specified, use the mid-point in dB
+ g = self.subdev.gain_range()
+ options.gain = float(g[0]+g[1])/2
+ self.subdev.set_gain(options.gain)
+
+ r = self.u.tune(0, self.subdev, options.freq)
+ if not r:
+ sys.stderr.write('Failed to set frequency\n')
+ raise SystemExit, 1
+
+ input_rate = self.adc_rate / options.decim
+ print "video sample rate %s" % (eng_notation.num_to_str(input_rate))
+
+ self.agc=gr.agc_cc(1e-7,1.0,1.0) #1e-7
+ self.am_demod = gr.complex_to_mag ()
+ self.set_blacklevel=gr.add_const_ff(options.brightness +255.0)
+ self.invert_and_scale = gr.multiply_const_ff (-options.contrast *128.0*255.0/(200.0))
+ self.f2uc=gr.float_to_uchar()
+
+ # sdl window as final sink
+ if not (options.pal or options.ntsc):
+ options.pal=True #set default to PAL
+ if options.pal:
+ lines_per_frame=625.0
+ frames_per_sec=25.0
+ show_width=768
+ elif options.ntsc:
+ lines_per_frame=525.0
+ frames_per_sec=29.97002997
+ show_width=640
+ width=int(input_rate/(lines_per_frame*frames_per_sec))
+ height=int(lines_per_frame)
+
+ if filename=="sdl":
+ #Here comes the tv screen, you have to build and install gr-video-sdl for this (subproject of gnuradio, only in cvs for now)
+ try:
+ video_sink = video_sdl.sink_uc ( frames_per_sec, width, height,0,show_width,height)
+ except:
+ print "gr-video-sdl is not installed"
+ print "realtime \"sdl\" video output window is not available"
+ raise SystemExit, 1
+ self.dst=video_sink
+ else:
+ print "You can use the imagemagick display tool to show the resulting imagesequence"
+ print "use the following line to show the demodulated TV-signal:"
+ print "display -depth 8 -size " +str(width)+ "x" + str(height) + " gray:" +filename
+ print "(Use the spacebar to advance to next frames)"
+ file_sink=gr.file_sink(gr.sizeof_char, filename)
+ self.dst =file_sink
+
+ if options.nframes is None:
+ self.connect(self.src, self.agc)
+ else:
+ self.head = gr.head(gr.sizeof_gr_complex, int(options.nframes*width*height))
+ self.connect(self.src, self.head, self.agc)
+
+ self.connect (self.agc,self.am_demod,self.invert_and_scale, self.set_blacklevel,self.f2uc,self.dst)
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
--
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