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      1 #!/bin/sh
      2 
      3 # Copyright (c) 2011-2014, Intel Corporation
      4 # All rights reserved.
      5 #
      6 # Redistribution and use in source and binary forms, with or without modification,
      7 # are permitted provided that the following conditions are met:
      8 #
      9 # 1. Redistributions of source code must retain the above copyright notice, this
     10 # list of conditions and the following disclaimer.
     11 #
     12 # 2. Redistributions in binary form must reproduce the above copyright notice,
     13 # this list of conditions and the following disclaimer in the documentation and/or
     14 # other materials provided with the distribution.
     15 #
     16 # 3. Neither the name of the copyright holder nor the names of its contributors
     17 # may be used to endorse or promote products derived from this software without
     18 # specific prior written permission.
     19 #
     20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
     21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     22 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     23 # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
     24 # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     25 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     26 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     27 # ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     29 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30 
     31 
     32 
     33 # This script reads an asound.conf file and produce for each alsa mixeur
     34 # it's differend values and pcm
     35 #
     36 # ouput example :
     37 #
     38 # my_alsa_mixeur
     39 #     true
     40 #        a_pcm
     41 #         an_other_pcm
     42 #    false
     43 #         in_this_pcm_my_alsa_mixer_takes_the_value_false
     44 # ...
     45 
     46 set -eu
     47 
     48 if test $# = 0
     49 then
     50     file="-"
     51 else
     52     file="$1"
     53 fi
     54 
     55 space="    "
     56 previous_command=""
     57 
     58 sed -nr -e 's#^pcm.(.*)\{.*$#\1#; t save;
     59         b next;
     60         :save;h;b' \
     61     \
     62     -e ':next; s/.*name\s+"(.*)"\s+value\s+([^}]*).*/\1 = \2 # /; t pcm;
     63         b;
     64         :pcm; G;s/\n//p;' -- "$file" |
     65     sort | \
     66     while read line
     67     do
     68         current_command="$( echo "$line" | sed 's/ =.*#.*//' )"
     69         #values are case insensitive
     70         current_value="$( echo "$line" | sed 's/.*= \(.*\) #.*/\1/' | tr [:upper:] [:lower:] )"
     71         current_mode="$( echo "$line" | sed 's/.*# //' )"
     72 
     73         if test "$previous_command" != "$current_command"
     74         then
     75             echo "$current_command"
     76             previous_command="$current_command"
     77             previous_value=""
     78         fi
     79 
     80 
     81         if test  "$previous_value" != "$current_value"
     82         then
     83             echo "$space$current_value"
     84             previous_value="$current_value"
     85         fi
     86 
     87         echo "$space$space$current_mode"
     88     done
     89