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https://github.com/alsa-project/alsa-utils
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44d3e8aa44
Add a simple plugin interface for processing the topology tree. There
can be cases where parts of the topology need to be translated from the
original format into something else. For example one could calculate
some kind of filter coefficients from filter parameters or some other
binary interface parameters from plain text topology tokens.
Mechanism is similar as in alsa-plugins and in the plugin there should
be only 1 function exported of the form:
int _snd_topology_##pluginname##_process (snd_config_t *input, snd_config_t *output)
Input and output parameters are snd_config tree before and after topology2
pre-processing. So the plugin can modify both if needed. There are cases
where the plugin may need to get information from input tree, but make
modifications to the output.
The plugins to be used can be defined in command line with:
alsatplg -DPREPROCESS_PLUGINS="foobar" -c topology.conf -p -o topology.tplg
Multiple plugins should be separated by ":".
Plugins to be used can also be defined with "Define" clause inside the
topology file (but command line takes precedence):
Define {
PREPROCESS_PLUGINS "foobar"
}
Link: https://github.com/alsa-project/alsa-utils/pull/129
Signed-off-by: Jaska Uimonen <jaska.uimonen@linux.intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
120 lines
5.2 KiB
C
120 lines
5.2 KiB
C
/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Lesser General Public License for more details.
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*
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PRE_PROCESSOR_H
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#define __PRE_PROCESSOR_H
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#include <stdarg.h>
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#include <stdbool.h>
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#include <string.h>
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#include "topology.h"
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#define DEBUG_MAX_LENGTH 256
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#define ARRAY_SIZE(a) (sizeof (a) / sizeof (a)[0])
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#define MAX_CONFIGS_IN_TEMPLATE 32
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struct config_template_items {
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char *int_config_ids[MAX_CONFIGS_IN_TEMPLATE];
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char *string_config_ids[MAX_CONFIGS_IN_TEMPLATE];
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char *compound_config_ids[MAX_CONFIGS_IN_TEMPLATE];
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};
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typedef int (*build_func)(struct tplg_pre_processor *tplg_pp, snd_config_t *obj,
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snd_config_t *parent);
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typedef int (*update_auto_attr_func)(struct tplg_pre_processor *tplg_pp,
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snd_config_t *obj, snd_config_t *parent);
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struct build_function_map {
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char *class_type;
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char *class_name;
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char *section_name;
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build_func builder;
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update_auto_attr_func auto_attr_updater;
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const struct config_template_items *template_items;
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};
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extern const struct build_function_map object_build_map[];
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/* debug helpers */
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void tplg_pp_debug(char *fmt, ...);
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void tplg_pp_config_debug(struct tplg_pre_processor *tplg_pp, snd_config_t *cfg);
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/* object build helpers */
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int tplg_build_object_from_template(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t **wtop, snd_config_t *top_config,
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bool skip_name);
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int tplg_build_tlv_object(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_scale_object(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_ops_object(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_channel_object(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_mixer_control(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_bytes_control(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_dapm_route_object(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_hw_cfg_object(struct tplg_pre_processor *tplg_pp,
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snd_config_t *obj_cfg, snd_config_t *parent);
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int tplg_build_fe_dai_object(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent);
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int tplg_build_base_object(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *parent, bool skip_name);
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int tplg_build_pcm_caps_object(struct tplg_pre_processor *tplg_pp,
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snd_config_t *obj_cfg, snd_config_t *parent);
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int tplg_parent_update(struct tplg_pre_processor *tplg_pp, snd_config_t *parent,
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const char *section_name, const char *item_name);
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int tplg_add_object_data(struct tplg_pre_processor *tplg_pp, snd_config_t *obj_cfg,
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snd_config_t *top, const char *array_name);
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/* object helpers */
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int tplg_pre_process_objects(struct tplg_pre_processor *tplg_pp, snd_config_t *cfg,
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snd_config_t *parent);
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snd_config_t *tplg_object_get_instance_config(struct tplg_pre_processor *tplg_pp,
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snd_config_t *class_type);
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const char *tplg_object_get_name(struct tplg_pre_processor *tplg_pp,
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snd_config_t *object);
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snd_config_t *tplg_object_get_section(struct tplg_pre_processor *tplg_pp, snd_config_t *class);
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/* class helpers */
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snd_config_t *tplg_class_lookup(struct tplg_pre_processor *tplg_pp, snd_config_t *cfg);
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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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bool tplg_class_is_attribute_mandatory(const char *attr, snd_config_t *class_cfg);
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bool tplg_class_is_attribute_immutable(const char *attr, snd_config_t *class_cfg);
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bool tplg_class_is_attribute_unique(const char *attr, snd_config_t *class_cfg);
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const char *tplg_class_get_unique_attribute_name(struct tplg_pre_processor *tplg_pp,
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snd_config_t *class);
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snd_config_type_t tplg_class_get_attribute_type(struct tplg_pre_processor *tplg_pp,
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snd_config_t *attr);
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const char *tplg_class_get_attribute_token_ref(struct tplg_pre_processor *tplg_pp,
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snd_config_t *class, const char *attr_name);
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long tplg_class_attribute_valid_tuple_value(struct tplg_pre_processor *tplg_pp,
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snd_config_t *class, snd_config_t *attr);
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/* config helpers */
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snd_config_t *tplg_find_config(snd_config_t *config, const char *name);
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int tplg_config_make_add(snd_config_t **config, const char *id, snd_config_type_t type,
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snd_config_t *parent);
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char *tplg_snprintf(char *fmt, ...);
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#endif
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