109 lines
3 KiB
Python
109 lines
3 KiB
Python
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# $Id$
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# PLAYFILE -> RECFILE:
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# Input file is played and is recorded to output, then compare them.
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# Useful to tes clock rates compatibility and resample quality
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# null-audio
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# port 1: wav file input xxxxxx.clock_rate.wav, e.g: test1.8.wav
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# port 2: wav file ouput xxxxxx.clock_rate.wav, e.g: res1.8.wav
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# wav input must be more than 3 seconds long
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import time
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import imp
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import sys
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import re
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import subprocess
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import inc_const as const
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from inc_cfg import *
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# Load configuration
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cfg_file = imp.load_source("cfg_file", ARGS[1])
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# WAV similarity calculator
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COMPARE_WAV_EXE = ""
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if sys.platform.find("win32")!=-1:
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COMPARE_WAV_EXE = "tools/cmp_wav.exe"
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G_INUNIX = False
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else:
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COMPARE_WAV_EXE = "tools/cmp_wav"
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G_INUNIX = True
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# Threshold to declare degradation is too high when result is lower than this value
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COMPARE_THRESHOLD = 2
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# COMPARE params
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input_filename = "" # Input filename
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output_filename = "" # Output filename
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# Test body function
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def test_func(t):
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global input_filename
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global output_filename
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endpt = t.process[0]
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# Get input file name
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input_filename = re.compile(const.MEDIA_PLAY_FILE).search(endpt.inst_param.arg).group(1)
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endpt.trace("Input file = " + input_filename)
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# Get output file name
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output_filename = re.compile(const.MEDIA_REC_FILE).search(endpt.inst_param.arg).group(1)
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endpt.trace("Output file = " + output_filename)
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# Find appropriate clock rate for the input file
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clock_rate = re.compile(".+(\.\d+\.wav)$").match(output_filename).group(1)
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if (clock_rate==None):
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endpt.trace("Cannot compare input & output, incorrect output filename format")
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return
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input_filename = re.sub("\.\d+\.wav$", clock_rate, input_filename)
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endpt.trace("WAV file to be compared with output = " + input_filename)
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# Connect input-output file
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endpt.sync_stdout()
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endpt.send("cc 1 2")
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endpt.expect(const.MEDIA_CONN_PORT_SUCCESS)
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# Wait
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time.sleep(3)
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endpt.sync_stdout()
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# Disconnect input-output file
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endpt.send("cd 1 2")
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endpt.expect(const.MEDIA_DISCONN_PORT_SUCCESS)
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# Post body function
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def post_func(t):
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global input_filename
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global output_filename
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endpt = t.process[0]
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# Check WAV similarity
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fullcmd = COMPARE_WAV_EXE + " " + input_filename + " " + output_filename + " " + "3000"
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endpt.trace("Popen " + fullcmd)
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cmp_proc = subprocess.Popen(fullcmd, shell=G_INUNIX, stdout=subprocess.PIPE, universal_newlines=True)
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# Parse similarity ouput
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line = cmp_proc.stdout.readline()
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mo_sim_val = re.match(".+=\s+(\d+)", line)
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if (mo_sim_val == None):
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raise TestError("Error comparing WAV files")
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return
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# Evaluate the similarity value
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sim_val = mo_sim_val.group(1)
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if (sim_val >= COMPARE_THRESHOLD):
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endpt.trace("WAV similarity = " + sim_val)
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else:
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raise TestError("WAV degraded heavily, similarity = " + sim_val)
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# Here where it all comes together
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test = cfg_file.test_param
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test.test_func = test_func
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test.post_func = post_func
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