def build_graph():
sample_rate = 8000
scale_factor = 32000
tb = gr.top_block()
src = audio.source(sample_rate, "plughw:0,0")
src_scale = blocks.multiply_const_ff(scale_factor)
interp = filter.rational_resampler_fff(8, 1)
f2s = blocks.float_to_short()
enc = vocoder.cvsd_encode_sb()
dec = vocoder.cvsd_decode_bs()
s2f = blocks.short_to_float()
decim = filter.rational_resampler_fff(1, 8)
sink_scale = blocks.multiply_const_ff(1.0/scale_factor)
sink = audio.sink(sample_rate, "plughw:0,0")
tb.connect(src, src_scale, interp, f2s, enc)
tb.connect(enc, dec, s2f, decim, sink_scale, sink)
if 0: # debug
tb.conect(src, blocks.file_sink(gr.sizeof_float, "source.dat"))
tb.conect(src_scale, blocks.file_sink(gr.sizeof_float, "src_scale.dat"))
tb.conect(interp, blocks.file_sink(gr.sizeof_float, "interp.dat"))
tb.conect(f2s, blocks.file_sink(gr.sizeof_short, "f2s.dat"))
tb.conect(enc, blocks.file_sink(gr.sizeof_char, "enc.dat"))
tb.conect(dec, blocks.file_sink(gr.sizeof_short, "dec.dat"))
tb.conect(s2f, blocks.file_sink(gr.sizeof_float, "s2f.dat"))
tb.conect(decim, blocks.file_sink(gr.sizeof_float, "decim.dat"))
tb.conect(sink_scale, blocks.file_sink(gr.sizeof_float, "sink_scale.dat"))
return tb
def build_graph():
sample_rate = 8000
scale_factor = 32000
tb = gr.top_block()
src = audio.source(sample_rate, "plughw:0,0")
src_scale = gr.multiply_const_ff(scale_factor)
interp = blks2.rational_resampler_fff(8, 1)
f2s = gr.float_to_short()
enc = vocoder.cvsd_encode_sb()
dec = vocoder.cvsd_decode_bs()
s2f = gr.short_to_float()
decim = blks2.rational_resampler_fff(1, 8)
sink_scale = gr.multiply_const_ff(1.0 / scale_factor)
sink = audio.sink(sample_rate, "plughw:0,0")
tb.connect(src, src_scale, interp, f2s, enc)
tb.connect(enc, dec, s2f, decim, sink_scale, sink)
if 0: # debug
tb.conect(src, gr.file_sink(gr.sizeof_float, "source.dat"))
tb.conect(src_scale, gr.file_sink(gr.sizeof_float, "src_scale.dat"))
tb.conect(interp, gr.file_sink(gr.sizeof_float, "interp.dat"))
tb.conect(f2s, gr.file_sink(gr.sizeof_short, "f2s.dat"))
tb.conect(enc, gr.file_sink(gr.sizeof_char, "enc.dat"))
tb.conect(dec, gr.file_sink(gr.sizeof_short, "dec.dat"))
tb.conect(s2f, gr.file_sink(gr.sizeof_float, "s2f.dat"))
tb.conect(decim, gr.file_sink(gr.sizeof_float, "decim.dat"))
tb.conect(sink_scale, gr.file_sink(gr.sizeof_float, "sink_scale.dat"))
return tb
def test001_module_load (self):
raw_enc = vocoder.cvsd_encode_sb()
raw_dec = vocoder.cvsd_decode_bs()
hb_enc = cvsd.cvsd_encode_fb()
hb_dec = cvsd.cvsd_decode_bf()
def test001_module_load (self):
raw_enc = vocoder.cvsd_encode_sb()
raw_dec = vocoder.cvsd_decode_bs()
hb_enc = cvsd.cvsd_encode_fb()
hb_dec = cvsd.cvsd_decode_bf()