add arb-resample.py

git-svn-id: http://op25.osmocom.org/svn/trunk@317 65a5c917-d112-43f1-993d-58c26a4786be

repeater/src/python/arb-resample.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+import sys
+import math
+from gnuradio import gr, gru, audio, eng_notation, blks2, optfir
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+class my_top_block(gr.top_block):
+    def __init__(self):
+        gr.top_block.__init__(self)
+        parser = OptionParser(option_class=eng_option)
+
+        parser.add_option("-c", "--calibration", type="eng_float", default=0, help="freq offset")
+        parser.add_option("-g", "--gain", type="eng_float", default=1)
+        parser.add_option("-i", "--input-file", type="string", default="in.dat", help="specify the input file")
+        parser.add_option("-o", "--output-file", type="string", default="out.dat", help="specify the output file")
+        parser.add_option("-r", "--new-sample-rate", type="int", default=96000, help="output sample rate")
+        parser.add_option("-s", "--sample-rate", type="int", default=48000, help="input sample rate")
+        (options, args) = parser.parse_args()
+ 
+        sample_rate = options.sample_rate
+        new_sample_rate = options.new_sample_rate
+
+        IN = gr.file_source(gr.sizeof_gr_complex, options.input_file)
+        OUT = gr.file_sink(gr.sizeof_gr_complex, options.output_file)
+
+        LO = gr.sig_source_c(sample_rate, gr.GR_COS_WAVE, options.calibration, 1.0, 0)
+        MIXER = gr.multiply_cc()
+
+        AMP = gr.multiply_const_cc(options.gain)
+
+        nphases = 32
+        frac_bw = 0.05
+        p1 = frac_bw
+        p2 = frac_bw
+        rs_taps = gr.firdes.low_pass(nphases, nphases, p1, p2)
+        #RESAMP = blks2.pfb_arb_resampler_ccf(float(sample_rate) / float(new_sample_rate), (rs_taps), nphases, )
+        RESAMP = blks2.pfb_arb_resampler_ccf(float(new_sample_rate) / float(sample_rate), (rs_taps), nphases, )
+
+        self.connect(IN, (MIXER, 0))
+        self.connect(LO, (MIXER, 1))
+
+        self.connect(MIXER, AMP, RESAMP, OUT)
+
+if __name__ == "__main__":
+    try:
+        my_top_block().run()
+    except KeyboardInterrupt:
+        tb.stop()