src/test-srcs

   1 #!/bin/sh
   2
   3 # Sample rate conversion tests.  Create a 20s sweep at the input sampling rate,
   4 # then use each resampler to convert it to the output rate.  Display the results
   5 # in a PNG file for each conversion.
   6
   7 # Set up the following two before running the script:
   8 SOX=./sox                        # The actual sox executable
   9 SSRC_PATH=/usr/local/bin         # Path to the two ssrc executables
  10
  11 RANGE=180
  12
  13 # Temporary files
  14 BASE=`basename $0`
  15 IN=/tmp/$BASE-in-$$.wav
  16 OUT=/tmp/$BASE-out-$$.wav
  17 TIME=/tmp/$BASE-time-$$.wav
  18
  19 test_converters () {
  20   # Create input file
  21   max=`expr $1 / 2`
  22   $SOX -r $1 -n -twavpcm $IN synth 20 sin 0:$max sin $max:0 gain -2
  23   for src in \
  24       "rate -h" \
  25       "rate -v" \
  26       "ssrc" \
  27       "ssrc_hp" \
  28       ; do
  29     echo $src
  30     case "$src" in
  31       ssrc*) time -f %U -o $TIME $SSRC_PATH/$src --quiet --rate $2 $IN $OUT;;
  32       *)     time -f %U -o $TIME $SOX $IN -r $2 $OUT $src;;
  33     esac
  34     t=`cat $TIME`
  35     $SOX $OUT -n spectrogram \
  36       -X 30 -z $RANGE -w kaiser \
  37       -t "$1->$2: $src" -c "${t}s user time" \
  38       -o "$1_$2_`echo $src | tr ' ' '_'`.png"
  39   done
  40
  41   rm -f $IN $OUT $TIME # Clean up
  42 }
  43
  44 test_converters 11025 48000
  45 test_converters 22000 96100
  46 test_converters 44100 96000
  47 test_converters 96000 44100
  48 test_converters 96000 8000 # rabbit 0.1.3 hangs, 0.1.4 is okay