62 lines
1.6 KiB
Python
62 lines
1.6 KiB
Python
from pycsdr.modules import Buffer
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import logging
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logger = logging.getLogger(__name__)
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class Chain:
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def __init__(self, *workers):
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self.input = None
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self.output = None
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self.workers = workers
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for i in range(1, len(self.workers)):
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self._connect(self.workers[i - 1], self.workers[i])
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def _connect(self, w1, w2):
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buffer = Buffer(w1.getOutputFormat())
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w1.setOutput(buffer)
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w2.setInput(buffer)
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def stop(self):
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for w in self.workers:
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w.stop()
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self.setInput(None)
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self.setOutput(None)
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def setInput(self, buffer):
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if self.input == buffer:
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return
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self.input = buffer
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self.workers[0].setInput(buffer)
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def setOutput(self, buffer):
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if self.output == buffer:
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return
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if self.output is not None:
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self.output.stop()
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self.output = buffer
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self.workers[-1].setOutput(buffer)
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def getOutputFormat(self):
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return self.workers[-1].getOutputFormat()
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def pump(self, write):
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if self.output is None:
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self.setOutput(Buffer(self.getOutputFormat()))
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def copy():
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run = True
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while run:
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data = None
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try:
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data = self.output.read()
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except ValueError:
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pass
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if data is None or (isinstance(data, bytes) and len(data) == 0):
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run = False
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else:
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write(data)
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return copy
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