uhd: Moved USRP analog TV receiver examples to gr-uhd/examples. They seem to run with the UHD, but I can't really test them since there's no NTSC signals around...

1 files changed, 206 insertions, 0 deletions

diff --git a/gr-uhd/examples/usrp_tv_rcv_nogui.py b/gr-uhd/examples/usrp_tv_rcv_nogui.py
new file mode 100755
index 000000000..a44e20d39
--- /dev/null
+++ b/gr-uhd/examples/usrp_tv_rcv_nogui.py
@@ -0,0 +1,206 @@
+#!/usr/bin/env python
+#
+# Copyright 2005-2007,2011 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+"""
+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 uhd
+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_top_block(gr.top_block):
+
+    def __init__(self):
+        gr.top_block.__init__(self)
+
+        usage=("%prog: [options] output_filename.\nSpecial 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("-a", "--address", type="string",
+                          default="addr=192.168.10.2",
+                          help="Address of UHD device, [default=%default]")
+        parser.add_option("-A", "--antenna", type="string", default=None,
+                          help="select Rx Antenna where appropriate")
+        parser.add_option("-s", "--samp-rate", type="eng_float", default=1e6,
+                          help="set sample rate")
+        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("-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=519.25e6,
+                          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("-N", "--nframes", type="eng_float", default=None,
+                          help="number of frames to collect [default=+inf]")
+        parser.add_option("", "--freq-min", type="eng_float", default=50.25e6,
+                          help="Set a minimum frequency [default=%default]")
+        parser.add_option("", "--freq-max", type="eng_float", default=900.25e6,
+                          help="Set a maximum frequency [default=%default]")
+        (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]
+
+        self.tv_freq_min = options.freq_min
+        self.tv_freq_max = options.freq_max
+
+        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
+
+        input_rate = options.samp_rate
+        print "video sample rate %s" % (eng_notation.num_to_str(input_rate))
+
+        if not (options.in_filename=="usrp"):
+          # file is data source, capture with usr_rx_csfile.py
+          self.filesource = gr.file_source(gr.sizeof_short,
+                                           options.in_filename,
+                                           options.repeat) 
+          self.istoc = gr.interleaved_short_to_complex()
+          self.connect(self.filesource,self.istoc)
+          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
+
+          # build the graph
+          self.u = uhd.usrp_source(device_addr=options.address,
+                                   io_type=uhd.io_type.COMPLEX_FLOAT32,
+                                   num_channels=1)
+
+          self.u.set_samp_rate(input_rate)
+          dev_rate = self.u.get_samp_rate()
+
+          self.src=self.u
+
+          if options.gain is None:
+              # if no gain was specified, use the mid-point in dB
+              g = self.u.get_gain_range()
+              options.gain = float(g.start()+g.stop())/2.0
+          self.u.set_gain(options.gain)
+
+          r = self.u.set_center_freq(options.freq)
+          if not r:
+              sys.stderr.write('Failed to set frequency\n')
+              raise SystemExit, 1
+
+        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_top_block().run()
+    except KeyboardInterrupt:
+        pass