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# $Id: mod_media_playrec.py 2884 2009-08-17 08:29:47Z bennylp $
# PLAYFILE -> RECFILE:
# Input file is played and is recorded to output, then compare them.
# Useful to tes clock rates compatibility and resample quality
# null-audio
# port 1: wav file input xxxxxx.clock_rate.wav, e.g: test1.8.wav
# port 2: wav file ouput xxxxxx.clock_rate.wav, e.g: res1.8.wav
# wav input must be more than 3 seconds long
import time
import imp
import sys
import re
import subprocess
import inc_const as const
from inc_cfg import *
# Load configuration
cfg_file = imp.load_source("cfg_file", ARGS[1])
# WAV similarity calculator
COMPARE_WAV_EXE = ""
if sys.platform.find("win32")!=-1:
COMPARE_WAV_EXE = "tools/cmp_wav.exe"
G_INUNIX = False
else:
COMPARE_WAV_EXE = "tools/cmp_wav"
G_INUNIX = True
# Threshold to declare degradation is too high when result is lower than this value
COMPARE_THRESHOLD = 2
# COMPARE params
input_filename = "" # Input filename
output_filename = "" # Output filename
# Test body function
def test_func(t):
global input_filename
global output_filename
endpt = t.process[0]
# Get input file name
input_filename = re.compile(const.MEDIA_PLAY_FILE).search(endpt.inst_param.arg).group(1)
endpt.trace("Input file = " + input_filename)
# Get output file name
output_filename = re.compile(const.MEDIA_REC_FILE).search(endpt.inst_param.arg).group(1)
endpt.trace("Output file = " + output_filename)
# Find appropriate clock rate for the input file
clock_rate = re.compile(".+(\.\d+\.wav)$").match(output_filename).group(1)
if (clock_rate==None):
endpt.trace("Cannot compare input & output, incorrect output filename format")
return
input_filename = re.sub("\.\d+\.wav$", clock_rate, input_filename)
endpt.trace("WAV file to be compared with output = " + input_filename)
# Connect input-output file
endpt.sync_stdout()
endpt.send("cc 1 2")
endpt.expect(const.MEDIA_CONN_PORT_SUCCESS)
# Wait
time.sleep(3)
endpt.sync_stdout()
# Disconnect input-output file
endpt.send("cd 1 2")
endpt.expect(const.MEDIA_DISCONN_PORT_SUCCESS)
# Post body function
def post_func(t):
global input_filename
global output_filename
endpt = t.process[0]
# Check WAV similarity
fullcmd = COMPARE_WAV_EXE + " " + input_filename + " " + output_filename + " " + "3000"
endpt.trace("Popen " + fullcmd)
cmp_proc = subprocess.Popen(fullcmd, shell=G_INUNIX, stdout=subprocess.PIPE, universal_newlines=True)
# Parse similarity ouput
line = cmp_proc.stdout.readline()
mo_sim_val = re.match(".+=\s+(\d+)", line)
if (mo_sim_val == None):
raise TestError("Error comparing WAV files")
return
# Evaluate the similarity value
sim_val = mo_sim_val.group(1)
if (sim_val >= COMPARE_THRESHOLD):
endpt.trace("WAV similarity = " + sim_val)
else:
raise TestError("WAV degraded heavily, similarity = " + sim_val)
# Here where it all comes together
test = cfg_file.test_param
test.test_func = test_func
test.post_func = post_func
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