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ucm: implement MacroDefine and Macro subtree evaluation

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The arguments are set as temporary variables as /MACRO_NAME/_/ARGUMENT_NAME/.

Example:

  # define new macro MyMacro with arguments ctl_name and ctl_value
  DefineMacro.MyMacro {
    BootSequence [
      cset "name='${var:MyMacro_ctl_name}' ${var:MyMacro_ctl_value}"
    ]
  }

  # instantiate macro for Speaker control (short version)
  Macro.headphone.MyMacro "ctl_name='Speaker Switch',ctl_value=off"

  # instantiate macro for Mic control (second version)
  Macro.mic.MyMacro {
	ctl_name "Mic Switch"
	ctl_value "off"
  }

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2022-05-13 16:07:38 +02:00
parent 3e5a894378
commit d7d5c724ed
6 changed files with 252 additions and 9 deletions
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6
src/ucm/ucm_subs.c
View file

@ -866,6 +866,12 @@ int uc_mgr_substitute_tree(snd_use_case_mgr_t *uc_mgr, snd_config_t *node)
}
return 0;
}
/* exception - macros are evaluated when instantied */
err = snd_config_get_id(node, &id);
if (err < 0)
return err;
if (id && strcmp(id, "DefineMacro") == 0)
return 0;
snd_config_for_each(i, next, node) {
n = snd_config_iterator_entry(i);
err = uc_mgr_substitute_tree(uc_mgr, n);