mirror of
https://github.com/alsa-project/alsa-utils
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1422c09afd
Add a helper function look up attribute definition in the "DefineAttribute" config in the class definition. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
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Copyright(c) 2021 Intel Corporation
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution
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in the file called LICENSE.GPL.
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*/
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#include <limits.h>
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#include <stdio.h>
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#include <alsa/input.h>
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#include <alsa/output.h>
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#include <alsa/conf.h>
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#include <alsa/error.h>
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#include "topology.h"
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#include "pre-processor.h"
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/*
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* Helper function to look up class definition from the Object config.
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* ex: For an object declaration, Object.Widget.pga.0{}, return the config correspdonding to
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* Class.Widget.pga{}. Note that input config , "cfg" does not include the "Object" node.
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*/
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snd_config_t *tplg_class_lookup(struct tplg_pre_processor *tplg_pp, snd_config_t *cfg)
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{
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snd_config_iterator_t first, end;
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snd_config_t *class, *class_cfg = NULL;
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const char *class_type, *class_name;
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char *class_config_id;
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int ret;
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if (snd_config_get_id(cfg, &class_type) < 0)
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return NULL;
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first = snd_config_iterator_first(cfg);
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end = snd_config_iterator_end(cfg);
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if (first == end) {
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SNDERR("No class name provided for object type: %s\n", class_type);
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return NULL;
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}
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class = snd_config_iterator_entry(first);
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if (snd_config_get_id(class, &class_name) < 0)
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return NULL;
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class_config_id = tplg_snprintf("Class.%s.%s", class_type, class_name);
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if (!class_config_id)
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return NULL;
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ret = snd_config_search(tplg_pp->input_cfg, class_config_id, &class_cfg);
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if (ret < 0)
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SNDERR("No Class definition found for %s\n", class_config_id);
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free(class_config_id);
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return class_cfg;
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}
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/* find the attribute config by name in the class definition */
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snd_config_t *tplg_class_find_attribute_by_name(struct tplg_pre_processor *tplg_pp,
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snd_config_t *class, const char *name)
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{
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snd_config_t *attr = NULL;
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const char *class_id;
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char *attr_str;
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int ret;
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if (snd_config_get_id(class, &class_id) < 0)
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return NULL;
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attr_str = tplg_snprintf("DefineAttribute.%s", name);
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if (!attr_str)
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return NULL;
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ret = snd_config_search(class, attr_str, &attr);
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if (ret < 0)
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SNDERR("No definition for attribute '%s' in class '%s'\n",
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name, class_id);
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free(attr_str);
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return attr;
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}
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