def __init__(self, dtype="discrete", limit=10000, randomize=False):
if (dtype == "discrete"):
gr.hier_block2.__init__(self, "source_alphabet",
gr.io_signature(0, 0, 0),
gr.io_signature(1, 1, gr.sizeof_char))
self.src = blocks.file_source(
gr.sizeof_char, "source_material/gutenberg_shakespeare.txt")
self.convert = blocks.packed_to_unpacked_bb(1, gr.GR_LSB_FIRST)
#self.convert = blocks.packed_to_unpacked_bb(8, gr.GR_LSB_FIRST);
self.limit = blocks.head(gr.sizeof_char, limit)
self.connect(self.src, self.convert)
last = self.convert
# whiten our sequence with a random block scrambler (optionally)
if (randomize):
rand_len = 256
rand_bits = np.random.randint(2, size=rand_len)
self.randsrc = blocks.vector_source_b(rand_bits, True)
self.xor = blocks.xor_bb()
self.connect(self.randsrc, (self.xor, 1))
self.connect(last, self.xor)
last = self.xor
else: # "type_continuous"
gr.hier_block2.__init__(self, "source_alphabet",
gr.io_signature(0, 0, 0),
gr.io_signature(1, 1, gr.sizeof_float))
self.src = mediatools.audiosource_s(
["source_material/serial-s01-e01.mp3"])
self.convert2 = blocks.interleaved_short_to_complex()
self.convert3 = blocks.multiply_const_cc(1.0 / 65535)
self.convert = blocks.complex_to_float()
self.limit = blocks.head(gr.sizeof_float, limit)
self.connect(self.src, self.convert2, self.convert3, self.convert)
last = self.convert
# connect head or not, and connect to output
if (limit == None):
self.connect(last, self)
else:
self.connect(last, self.limit, self)
import sys;
from gnuradio import gr,audio;
import mediatools;
sys.path.append(".");
# Construct playlist
pl = mediatools.strvec(["1.mp3","2.ogg"]);
# Setup sample rates
dac_sample_rate = 44100;
file_sample_rate = 44100;
default_device = "";
# Instantiate blocks
tb = gr.top_block();
src = mediatools.audiosource_s(pl);
s2c = gr.interleaved_short_to_complex();
c2f = gr.complex_to_float();
mc = gr.multiply_const_cc(1.0/(32768.0)); # scale to the +1 / -1 range
sink = audio.sink(dac_sample_rate,default_device);
# Connect up flowgraph
tb.connect(src,s2c,mc,c2f); # connect src->scalar->float conversion
tb.connect(c2f,sink); # connect left channel
tb.connect((c2f,1),(sink,1)); # connect right channel
# And go
tb.run();