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| 1 | #! /usr/bin/python | ||
| 2 | |||
| 3 | import pygst | ||
| 4 | pygst.require('0.10') | ||
| 5 | import gst | ||
| 6 | import gobject | ||
| 7 | gobject.threads_init () | ||
| 8 | |||
| 9 | def gst_buffer_to_numpy_array(buffer, chan): | ||
| 10 | import numpy | ||
| 11 | samples = numpy.frombuffer(buffer.data, dtype=numpy.float32) | ||
| 12 | if chan == 1: | ||
| 13 | return samples.T | ||
| 14 | else: | ||
| 15 | samples.resize([len(samples)/chan, chan]) | ||
| 16 | return samples.T | ||
| 17 | |||
| 18 | class AubioSink(gst.BaseSink): | ||
| 19 | _caps = gst.caps_from_string('audio/x-raw-float, \ | ||
| 20 | rate=[ 1, 2147483647 ], \ | ||
| 21 | channels=[ 1, 2147483647 ], \ | ||
| 22 | endianness={ 1234, 4321 }, \ | ||
| 23 | width=32') | ||
| 24 | |||
| 25 | __gsttemplates__ = ( | ||
| 26 | gst.PadTemplate ("sink", | ||
| 27 | gst.PAD_SINK, | ||
| 28 | gst.PAD_ALWAYS, | ||
| 29 | _caps), | ||
| 30 | ) | ||
| 31 | |||
| 32 | def __init__(self, name, process): | ||
| 33 | self.__gobject_init__() | ||
| 34 | self.set_name(name) | ||
| 35 | self.process = process | ||
| 36 | self.adapter = gst.Adapter() | ||
| 37 | self.set_property('sync', False) | ||
| 38 | self.pos = 0 | ||
| 39 | |||
| 40 | def set_property(self, name, value): | ||
| 41 | if name == 'hopsize': | ||
| 42 | # blocksize is in byte, convert from hopsize | ||
| 43 | from struct import calcsize | ||
| 44 | self.set_property('blocksize', value * calcsize('f')) | ||
| 45 | else: | ||
| 46 | super(gst.BaseSink, self).set_property(name, value) | ||
| 47 | |||
| 48 | def do_render(self, buffer): | ||
| 49 | blocksize = self.get_property('blocksize') | ||
| 50 | caps = buffer.get_caps() | ||
| 51 | chan = caps[0]['channels'] | ||
| 52 | self.adapter.push(buffer) | ||
| 53 | while self.adapter.available() >= blocksize: | ||
| 54 | block = self.adapter.take_buffer(blocksize) | ||
| 55 | v = gst_buffer_to_numpy_array(block, chan) | ||
| 56 | if self.process: | ||
| 57 | self.process(v, self.pos) | ||
| 58 | self.pos += 1 | ||
| 59 | remaining = self.adapter.available() | ||
| 60 | if remaining < blocksize and remaining > 0: | ||
| 61 | block = self.adapter.take_buffer(remaining) | ||
| 62 | v = gst_buffer_to_numpy_array(block, chan) | ||
| 63 | if self.process: | ||
| 64 | self.process(v, self.pos) | ||
| 65 | self.pos += 1 | ||
| 66 | return gst.FLOW_OK | ||
| 67 | |||
| 68 | gobject.type_register(AubioSink) | ||
| 69 | |||
| 70 | class aubioinput(gst.Bin): | ||
| 71 | |||
| 72 | ret = 0 | ||
| 73 | |||
| 74 | def __init__(self, uri, process = None, hopsize = 512, | ||
| 75 | caps = None): | ||
| 76 | if uri.startswith('/'): | ||
| 77 | from urllib import quote | ||
| 78 | uri = 'file://'+quote(uri) | ||
| 79 | src = gst.element_factory_make('uridecodebin') | ||
| 80 | src.set_property('uri', uri) | ||
| 81 | src.connect('pad-added', self.source_pad_added_cb) | ||
| 82 | conv = gst.element_factory_make('audioconvert') | ||
| 83 | self.conv = conv | ||
| 84 | rsmpl = gst.element_factory_make('audioresample') | ||
| 85 | capsfilter = gst.element_factory_make('capsfilter') | ||
| 86 | if caps: | ||
| 87 | capsfilter.set_property('caps', gst.caps_from_string(caps)) | ||
| 88 | sink = AubioSink("AubioSink", process = process) | ||
| 89 | sink.set_property('hopsize', hopsize) # * calcsize('f')) | ||
| 90 | |||
| 91 | self.pipeline = gst.Pipeline() | ||
| 92 | |||
| 93 | self.bus = self.pipeline.get_bus() | ||
| 94 | self.bus.add_signal_watch() | ||
| 95 | self.bus.connect('message', self.on_eos) | ||
| 96 | |||
| 97 | self.apad = conv.get_pad('sink') | ||
| 98 | |||
| 99 | self.pipeline.add(src, conv, rsmpl, capsfilter, sink) | ||
| 100 | |||
| 101 | gst.element_link_many(conv, rsmpl, capsfilter, sink) | ||
| 102 | |||
| 103 | self.mainloop = gobject.MainLoop() | ||
| 104 | self.pipeline.set_state(gst.STATE_PLAYING) | ||
| 105 | |||
| 106 | def run(self): | ||
| 107 | self.mainloop.run() | ||
| 108 | return self.ret | ||
| 109 | |||
| 110 | def source_pad_added_cb(self, src, pad): | ||
| 111 | name = pad.get_caps()[0].get_name() | ||
| 112 | if name == 'audio/x-raw-float' or name == 'audio/x-raw-int': | ||
| 113 | pad.link(self.conv.get_pad("sink")) | ||
| 114 | |||
| 115 | def source_pad_removed_cb(self, src, pad): | ||
| 116 | pad.unlink(self.conv.get_pad("sink")) | ||
| 117 | |||
| 118 | def on_eos(self, bus, msg): | ||
| 119 | if msg.type == gst.MESSAGE_EOS: | ||
| 120 | self.bus.remove_signal_watch() | ||
| 121 | self.pipeline.set_state(gst.STATE_PAUSED) | ||
| 122 | self.mainloop.quit() | ||
| 123 | elif msg.type == gst.MESSAGE_ERROR: | ||
| 124 | print "ERROR", msg.parse_error() | ||
| 125 | self.bus.remove_signal_watch() | ||
| 126 | self.pipeline.set_state(gst.STATE_PAUSED) | ||
| 127 | self.mainloop.quit() | ||
| 128 | self.ret = 1 # set return value to 1 in case of error | ||
| 129 | |||
| 130 | if __name__ == '__main__': | ||
| 131 | import sys | ||
| 132 | if len(sys.argv) < 2: | ||
| 133 | print "Usage: %s <filename>" % sys.argv[0] | ||
| 134 | sys.exit(1) | ||
| 135 | for filename in sys.argv[1:]: | ||
| 136 | peak = [0.] # use a mutable | ||
| 137 | def process(buf, hop): | ||
| 138 | peak[0] = max( peak[0], abs(buf.max()) ) | ||
| 139 | a = aubioinput(filename, process = process, hopsize = 512) | ||
| 140 | if a.run() == 0: # only display the results if no | ||
| 141 | print "Finished reading %s, peak value is %f" % (filename, max(peak)) | ||