6a39e4f5f5
Renamed directory "dev" to "dev_tools". Replaced the ecasound-2.7.2 with a new download of ecasound. The reason is that the previous ecasound directory had all the Makefiles checked in with hardcoded paths from Naomi's computer. This prevented anyone else from being able to build. I copied over the modified version of ecacontrol.py.
67 lines
1.9 KiB
Python
67 lines
1.9 KiB
Python
#!/usr/local/bin/python
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# -----------------------------------------------------------------------
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# Example of an audio file volume normalizer (peak amplitude).
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#
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# 1. Takes the filename to be processed from the command line.
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# 2. Runs the audio file through ecasound's volume analyzer.
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# 3. If the signal isn't normalized (gain factor > 1), it is amplified
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# (gain factor from the analyzer) and the original file is replaced.
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# 4. Removes the temp file and exits.
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#
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# Known "bugs":
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# - if ecasound's internal sample rate doesn't match audio file's
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# sample rate, signal will get resampled twice
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# - might change the audio format of the processed files
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# -----------------------------------------------------------------------
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import os
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import sys
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from tempfile import mktemp
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from pyeca import *
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# check arguments
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if len(sys.argv) < 2: sys.exit(-1)
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filename = sys.argv[1]
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if not os.path.isfile(filename): sys.exit(-1)
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tmpfile = mktemp(".wav")
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# create and configure the 'analyze' chainsetup
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e = ECA_CONTROL_INTERFACE()
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e.command("cs-add analyze")
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e.command("c-add 1")
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print "Normalizing file " + filename
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print "Using tempfile " + tmpfile
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e.command("ai-add " + filename)
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e.command("ao-add " + tmpfile)
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e.command("cop-add -ev")
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print "Analyzing sample data."
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e.command("cs-connect")
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e.command("run")
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e.command("cop-select 1")
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e.command("copp-select 2")
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e.command("copp-get")
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gain_factor = e.last_float()
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e.command("cs-disconnect")
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if gain_factor <= 1:
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print "File already normalized!"
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sys.exit(0)
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# create and config the 'apply' chainsetup
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a = ECA_CONTROL_INTERFACE()
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a.command("cs-add apply")
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a.command("c-add 1")
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a.command("ai-add " + tmpfile)
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a.command("ao-add " + filename)
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print "Applying gain factor: ", gain_factor
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a.command("cop-add -ea:100")
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a.command("cop-select 1")
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a.command("copp-select 1")
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a.command_float_arg("copp-set", gain_factor * 100)
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a.command("cs-connect")
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a.command("run")
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# remove the tempfile and exit
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os.remove(tmpfile)
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print "Done!"
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sys.exit(0)
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