diff options
Diffstat (limited to 'gr-uhd/examples/python/usrp_tv_rcv.py')
| -rwxr-xr-x | gr-uhd/examples/python/usrp_tv_rcv.py | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/gr-uhd/examples/python/usrp_tv_rcv.py b/gr-uhd/examples/python/usrp_tv_rcv.py new file mode 100755 index 000000000..700915bf8 --- /dev/null +++ b/gr-uhd/examples/python/usrp_tv_rcv.py @@ -0,0 +1,443 @@ +#!/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. +# + +""" +Realtime capture and display of analog Tv stations. + +Can also use a file as source or sink + +When you use an output file you can show the results frame-by-frame +using ImageMagick + +When you want to use the realtime sdl display window you must first +install gr-video-sdl. + +When you use a file source, instead of the usrp, make sure you +capture interleaved shorts. (Use usrp_rx_file.py, or use +usrp_rx_cfile.py --output-shorts if you have a recent enough +usrp_rx_cfile.py) + +There is no synchronisation yet. The sync blocks are in development +but not yet in cvs. +""" + +from gnuradio import gr +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" +from gnuradio import uhd +from gnuradio.eng_option import eng_option +from gnuradio.wxgui import slider, powermate +from gnuradio.wxgui import stdgui2, fftsink2, form +from optparse import OptionParser +import sys +import wx + + +class tv_rx_block (stdgui2.std_top_block): + def __init__(self,frame,panel,vbox,argv): + stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv) + + usage="%prog: [options] [input_filename]. \n If you don't specify an input filename the usrp will be used as source\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", "--args", type="string", default="", + help="UHD device address args [default=%default]") + parser.add_option("", "--spec", type="string", default=None, + help="Subdevice of UHD device where appropriate") + 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("-f", "--freq", type="eng_float", default=519.25e6, + help="set frequency to FREQ", metavar="FREQ") + parser.add_option("-g", "--gain", type="eng_float", default=None, + help="set gain in dB (default is midpoint)") + 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("-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("-o", "--out-filename", type="string", default="sdl", + help="For example out_raw_uchar.gray. If you don't specify an output filename you will get a video_sink_sdl realtime output window. You then need to have gr-video-sdl installed)") + parser.add_option("-r", "--repeat", action="store_false", default=True, + help="repeat file in a loop") + 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) or (len(args) == 0)): + parser.print_help() + sys.exit(1) + + if len(args) == 1: + filename = args[0] + else: + filename = None + + self.frame = frame + self.panel = panel + + self.contrast = options.contrast + self.brightness = options.brightness + self.state = "FREQ" + self.freq = 0 + + self.tv_freq_min = options.freq_min + self.tv_freq_max = options.freq_max + + # build graph + self.u=None + + if not (options.out_filename=="sdl"): + options.repeat=False + + usrp_rate = options.samp_rate + + if not ((filename is None) or (filename=="usrp")): + # file is data source + self.filesource = gr.file_source(gr.sizeof_short,filename,options.repeat) + self.istoc = gr.interleaved_short_to_complex() + self.connect(self.filesource,self.istoc) + self.src=self.istoc + + options.gain=0.0 + self.gain=0.0 + + else: # use a UHD device + self.u = uhd.usrp_source(device_addr=options.args, stream_args=uhd.stream_args('fc32')) + + # Set the subdevice spec + if(options.spec): + self.u.set_subdev_spec(options.spec, 0) + + # Set the antenna + if(options.antenna): + self.u.set_antenna(options.antenna, 0) + + self.u.set_samp_rate(usrp_rate) + dev_rate = self.u.get_samp_rate() + + 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.src=self.u + + self.gain = options.gain + + 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(usrp_rate/(lines_per_frame*frames_per_sec)) + height=int(lines_per_frame) + + if (options.out_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:" + options.out_filename + print "(Use the spacebar to advance to next frames)" + options.repeat=False + file_sink=gr.file_sink(gr.sizeof_char, options.out_filename) + self.dst =file_sink + + 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(0.0) + self.invert_and_scale = gr.multiply_const_ff (0.0) #-self.contrast *128.0*255.0/(200.0) + + # now wire it all together + #sample_rate=options.width*options.height*options.framerate + + process_type='do_no_sync' + if process_type=='do_no_sync': + self.connect (self.src, self.agc,self.am_demod, + self.invert_and_scale, self.set_blacklevel, + f2uc,self.dst) + elif process_type=='do_tv_sync_adv': + #defaults: gr.tv_sync_adv (double sampling_freq, unsigned + #int tv_format,bool output_active_video_only=false, bool + #do_invert=false, double wanted_black_level=0.0, double + #wanted_white_level=255.0, double avg_alpha=0.1, double + #initial_gain=1.0, double initial_offset=0.0,bool + #debug=false) + + #note, this block is not yet in cvs + self.tv_sync_adv=gr.tv_sync_adv(usrp_rate, 0, False, False, + 0.0, 255.0, 0.01, 1.0, 0.0, False) + self.connect (self.src, self.am_demod, self.invert_and_scale, + self.tv_sync_adv, s2f, f2uc, self.dst) + + elif process_type=='do_nullsink': + #self.connect (self.src, self.am_demod,self.invert_and_scale,f2uc,video_sink) + c2r=gr.complex_to_real() + nullsink=gr.null_sink(gr.sizeof_float) + self.connect (self.src, c2r,nullsink) #video_sink) + elif process_type=='do_tv_sync_corr': + frame_size=width*height #int(usrp_rate/25.0) + nframes=10# 32 + search_window=20*nframes + debug=False + video_alpha=0.3 #0.1 + corr_alpha=0.3 + + #Note: this block is not yet in cvs + tv_corr=gr.tv_correlator_ff(frame_size,nframes, search_window, + video_alpha, corr_alpha,debug) + shift=gr.add_const_ff(-0.7) + + self.connect (self.src, self.agc, self.am_demod, tv_corr, + self.invert_and_scale, self.set_blacklevel, + f2uc, self.dst) + else: # process_type=='do_test_image': + src_vertical_bars = gr.sig_source_f (usrp_rate, gr.GR_SIN_WAVE, + 10.0 *usrp_rate/320, 255,128) + self.connect(src_vertical_bars, f2uc, self.dst) + + self._build_gui(vbox, usrp_rate, usrp_rate, usrp_rate) + + + frange = self.u.get_freq_range() + if(frange.start() > self.tv_freq_max or frange.stop() < self.tv_freq_min): + sys.stderr.write("Radio does not support required frequency range.\n") + sys.exit(1) + if(options.freq < self.tv_freq_min or options.freq > self.tv_freq_max): + sys.stderr.write("Requested frequency is outside of required frequency range.\n") + sys.exit(1) + + # set initial values + self.set_gain(options.gain) + self.set_contrast(self.contrast) + self.set_brightness(options.brightness) + if not(self.set_freq(options.freq)): + self._set_status_msg("Failed to set initial frequency") + + + def _set_status_msg(self, msg, which=0): + self.frame.GetStatusBar().SetStatusText(msg, which) + + + def _build_gui(self, vbox, usrp_rate, demod_rate, audio_rate): + + def _form_set_freq(kv): + return self.set_freq(kv['freq']) + + + if 0: + self.src_fft = fftsink.fft_sink_c (self, self.panel, title="Data from USRP", + fft_size=512, sample_rate=usrp_rate) + self.connect (self.src, self.src_fft) + vbox.Add (self.src_fft.win, 4, wx.EXPAND) + + if 0: + post_demod_fft = fftsink.fft_sink_f (self, self.panel, title="Post Demod", + fft_size=512, sample_rate=demod_rate, + y_per_div=10, ref_level=-40) + self.connect (self.am_demod, post_demod_fft) + vbox.Add (post_demod_fft.win, 4, wx.EXPAND) + + if 0: + post_filt_fft = fftsink.fft_sink_f (self, self.panel, title="Post Filter", + fft_size=512, sample_rate=audio_rate, + y_per_div=10, ref_level=-40) + self.connect (self.set_blacklevel, post_filt) + vbox.Add (fft_win4, 4, wx.EXPAND) + + + # control area form at bottom + self.myform = myform = form.form() + + if not (self.u is None): + hbox = wx.BoxSizer(wx.HORIZONTAL) + hbox.Add((5,0), 0) + myform['freq'] = form.float_field( + parent=self.panel, sizer=hbox, label="Freq", weight=1, + callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg)) + + hbox.Add((5,0), 0) + myform['freq_slider'] = \ + form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3, + range=(self.tv_freq_min, self.tv_freq_max, 0.25e6), + callback=self.set_freq) + hbox.Add((5,0), 0) + vbox.Add(hbox, 0, wx.EXPAND) + + hbox = wx.BoxSizer(wx.HORIZONTAL) + hbox.Add((5,0), 0) + + myform['contrast'] = \ + form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Contrast", + weight=3, range=(-2.0, 2.0, 0.1), + callback=self.set_contrast) + hbox.Add((5,0), 1) + + myform['brightness'] = \ + form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Brightness", + weight=3, range=(-255.0, 255.0, 1.0), + callback=self.set_brightness) + hbox.Add((5,0), 0) + + if not (self.u is None): + g = self.u.get_gain_range() + myform['gain'] = \ + form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain", + weight=3, range=(g.start(), g.stop(), g.step()), + callback=self.set_gain) + hbox.Add((5,0), 0) + vbox.Add(hbox, 0, wx.EXPAND) + + try: + self.knob = powermate.powermate(self.frame) + self.rot = 0 + powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate) + powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button) + except: + print "FYI: No Powermate or Contour Knob found" + + + def on_rotate (self, event): + self.rot += event.delta + if (self.state == "FREQ"): + if self.rot >= 3: + self.set_freq(self.freq + .1e6) + self.rot -= 3 + elif self.rot <=-3: + self.set_freq(self.freq - .1e6) + self.rot += 3 + elif (self.state == "CONTRAST"): + step = 0.1 + if self.rot >= 3: + self.set_contrast(self.contrast + step) + self.rot -= 3 + elif self.rot <=-3: + self.set_contrast(self.contrast - step) + self.rot += 3 + else: + step = 1 + if self.rot >= 3: + self.set_brightness(self.brightness + step) + self.rot -= 3 + elif self.rot <=-3: + self.set_brightness(self.brightness - step) + self.rot += 3 + + def on_button (self, event): + if event.value == 0: # button up + return + self.rot = 0 + if self.state == "FREQ": + self.state = "CONTRAST" + elif self.state == "CONTRAST": + self.state = "BRIGHTNESS" + else: + self.state = "FREQ" + self.update_status_bar () + + + def set_contrast (self, contrast): + self.contrast = contrast + self.invert_and_scale.set_k(-self.contrast *128.0*255.0/(200.0)) + self.myform['contrast'].set_value(self.contrast) + self.update_status_bar () + + def set_brightness (self, brightness): + self.brightness = brightness + self.set_blacklevel.set_k(self.brightness +255.0) + self.myform['brightness'].set_value(self.brightness) + self.update_status_bar () + + def set_freq(self, target_freq): + """ + Set the center frequency we're interested in. + + @param target_freq: frequency in Hz + @rypte: bool + + Tuning is a two step process. First we ask the front-end to + tune as close to the desired frequency as it can. Then we use + the result of that operation and our target_frequency to + determine the value for the digital down converter. + """ + if not (self.u is None): + r = self.u.set_center_freq(target_freq) + if r: + self.freq = target_freq + self.myform['freq'].set_value(target_freq) # update displayed value + self.myform['freq_slider'].set_value(target_freq) # update displayed value + self.update_status_bar() + self._set_status_msg("OK", 0) + return True + + self._set_status_msg("Failed", 0) + return False + + def set_gain(self, gain): + if not (self.u is None): + self.gain=gain + self.myform['gain'].set_value(gain) # update displayed value + self.u.set_gain(gain) + self.update_status_bar() + + def update_status_bar (self): + msg = "Setting:%s Contrast:%r Brightness:%r Gain: %r" % \ + (self.state, self.contrast,self.brightness,self.gain) + self._set_status_msg(msg, 1) + #self.src_fft.set_baseband_freq(self.freq) + + +if __name__ == '__main__': + app = stdgui2.stdapp (tv_rx_block, "USRP TV RX black-and-white") + app.MainLoop () |