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37 lines
1 KiB
Python
37 lines
1 KiB
Python
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#!/usr/bin/env python
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# audio-controller.py
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# (c) 2005 Edward Hervey <edward at fluendo dot com>
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# Test case for the GstController on sinesrc -> alsasink
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# Inspired from ensonic's examples/controller/audio-controller.c
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import gst
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import time
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def main():
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pipeline = gst.Pipeline("audiocontroller")
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src = gst.element_factory_make("sinesrc", "src")
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sink = gst.element_factory_make("alsasink", "sink")
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pipeline.add_many(src, sink)
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src.link(sink)
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control = gst.Controller(src, "freq", "volume")
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control.set_interpolation_mode("volume", gst.INTERPOLATE_LINEAR)
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control.set_interpolation_mode("volume", gst.INTERPOLATE_LINEAR)
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control.set("volume", 0, 0.0)
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control.set("volume", 2 * gst.SECOND, 1.0)
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control.set("volume", 4 * gst.SECOND, 0.0)
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control.set("volume", 6 * gst.SECOND, 1.0)
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control.set("freq", 0, 440.0)
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control.set("freq", 3 * gst.SECOND, 3000.0)
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control.set("freq", 6 * gst.SECOND, 880.0)
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pipeline.set_state(gst.STATE_PLAYING)
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time.sleep(7)
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if __name__ == "__main__":
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main()
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