#!/usr/bin/env python """ 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 (is in gnuradio cvs). When you use a file source, in stead 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, gru, eng_notation, optfir, video_analog 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 usrp from gnuradio import uhd from gnuradio.eng_option import eng_option from gnuradio.wxgui import slider, powermate #from gnuradio.wxgui import stdgui, fftsink, form from gnuradio.wxgui import stdgui2, fftsink2, form from optparse import OptionParser import sys import math import wx # To debug, insert this in your test code... #import os #print 'Blocked waiting for GDB attach (pid = %d)' % (os.getpid(),) #raw_input ('Press Enter to continue: ') # remainder of your test code follows... #class tv_rx_graph (stdgui.gui_flow_graph): # def __init__(self,frame,panel,vbox,argv): # stdgui.gui_flow_graph.__init__ (self,frame,panel,vbox,argv) class tv_rx_graph (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) parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, help="select USRP Rx side A or B (default=A)") parser.add_option("-d", "--decim", type="int", default=64, help="set fgpa decimation rate to DECIM [default=%default]") 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("-8", "--width-8", action="store_true", default=False, help="Enable 8-bit samples across USB") 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("-N", "--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) 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 # build graph self.src=None usrp_decim = options.decim # 32 if not (options.out_filename=="sdl"): options.repeat=False if not ((filename is None) or (filename=="usrp")): self.filesource = gr.file_source(gr.sizeof_short,filename,options.repeat) # file is data source self.istoc = gr.interleaved_short_to_complex() self.connect(self.filesource,self.istoc) adc_rate=64e6 self.src=self.istoc options.gain=0.0 self.gain=0.0 else: 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) self.src= uhd.usrp_source(device_addr='', io_type=uhd.io_type.COMPLEX_FLOAT32, num_channels=1) if options.gain is None: # if no gain was specified, use the mid-point in dB g = self.src.get_gain_range() options.gain = g.start() + (g.stop() - g.start()) / 2 self.gain = options.gain #self.src.set_antenna('TX/RX') self.src.set_antenna('RX2') self.src.set_samp_rate(12e6) usrp_rate = self.src.get_samp_rate() print "using rate", usrp_rate f2uc=gr.float_to_uchar() # sdl window as final sink if not (options.pal or options.ntsc): #options.pal=True #set default to PAL options.pal=False # default NTSC 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) print "w/h", width, height self.ntsc_detector = video_analog.field_detector_fub (usrp_rate) width = self.ntsc_detector.get_width() height = self.ntsc_detector.get_height() 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 (0, width, height,0,640,640) 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.agc = video_analog.scale_ff (50000, 0.4) 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.am_demod, self.agc, self.ntsc_detector,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) self.tv_sync_adv=gr.tv_sync_adv(usrp_rate,0,False,False,0.0,255.0,0.01,1.0,0.0,False) #note, this block is not yet in cvs 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 tv_corr=gr.tv_correlator_ff(frame_size,nframes, search_window, video_alpha, corr_alpha,debug) #Note: this block is not yet in cvs 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) #self.agc, 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) if abs(options.freq) < 1e6: options.freq *= 1e6 # 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 = fftsink2.fft_sink_c (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 1: post_demod_fft = fftsink2.fft_sink_f (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 = fftsink2.fft_sink_f (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.src 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=(50.25e6, 900.25e6, 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.src is None): r = self.src.get_gain_range() r = r.start(), r.stop(), r.step() myform['gain'] = \ form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain", weight=3, range=r, 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.ntsc_detector.set_contrast(contrast) 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.ntsc_detector.set_brightness(brightness) 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.src is None): self.src.set_center_freq(target_freq, 0) self.freq = self.src.get_center_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.src is None): self.src.set_gain(gain) self.gain= self.src.get_gain() self.myform['gain'].set_value(gain) # update displayed value 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_graph, "USRP TV RX black-and-white") app.MainLoop ()