mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-02 09:01:48 -05:00
ucm: add support for verb variants
The bellow configuration example creates two verbs ("HiFi" and "HiFi 7+1")
with different playback channels for the "Speaker" device.
SectionUseCase."HiFi" {
File "HiFi.conf"
Variant."HiFi" {
Comment "Default"
}
Variant."HiFi 7+1" {
Comment "HiFi 7.1"
}
}
SectionDevice."Speaker" {
Value {
PlaybackChannels 2
}
Variant."HiFi 7+1".Value {
PlaybackChannels 8
}
}
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela
parent
25e44bbeb9
commit
c3a5d32ac3
2 changed files with 189 additions and 20 deletions
207
src/ucm/parser.c
207
src/ucm/parser.c
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@ -531,8 +531,7 @@ static int evaluate_include(snd_use_case_mgr_t *uc_mgr,
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/*
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* Evaluate condition (in-place)
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*/
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static int evaluate_condition(snd_use_case_mgr_t *uc_mgr,
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snd_config_t *cfg)
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static int evaluate_condition(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg)
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{
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snd_config_t *n;
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int err;
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@ -548,6 +547,58 @@ static int evaluate_condition(snd_use_case_mgr_t *uc_mgr,
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return err;
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}
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/*
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* Evaluate variant (in-place)
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*/
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static int evaluate_variant(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg)
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{
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snd_config_iterator_t i, next;
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snd_config_t *n, *c;
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const char *id;
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int err;
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err = snd_config_search(cfg, "Variant", &c);
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if (err == -ENOENT)
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return 1;
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if (err < 0)
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return err;
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if (uc_mgr->conf_format < 6) {
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uc_error("Variant is supported in v6+ syntax");
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return -EINVAL;
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}
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if (uc_mgr->parse_master_section)
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return 1;
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if (uc_mgr->parse_variant == NULL)
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goto __ret;
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snd_config_for_each(i, next, c) {
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n = snd_config_iterator_entry(i);
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if (snd_config_get_id(n, &id) < 0)
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return -EINVAL;
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if (strcmp(id, uc_mgr->parse_variant))
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continue;
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err = uc_mgr_evaluate_inplace(uc_mgr, n);
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if (err < 0)
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return err;
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err = uc_mgr_config_tree_merge(uc_mgr, cfg, n, NULL, NULL);
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if (err < 0)
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return err;
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snd_config_delete(c);
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return 0;
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}
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__ret:
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snd_config_delete(c);
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return 1;
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}
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/*
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* In-place evaluate
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*/
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@ -555,9 +606,9 @@ int uc_mgr_evaluate_inplace(snd_use_case_mgr_t *uc_mgr,
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snd_config_t *cfg)
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{
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long iterations = 10000;
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int err1 = 0, err2 = 0, err3 = 0, err4 = 0;
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int err1 = 0, err2 = 0, err3 = 0, err4 = 0, err5 = 0;
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while (err1 == 0 || err2 == 0 || err3 == 0 || err4 == 0) {
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while (err1 == 0 || err2 == 0 || err3 == 0 || err4 == 0 || err5 == 0) {
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if (iterations == 0) {
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uc_error("Maximal inplace evaluation iterations number reached (recursive references?)");
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return -EINVAL;
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@ -575,20 +626,25 @@ int uc_mgr_evaluate_inplace(snd_use_case_mgr_t *uc_mgr,
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/* conditions may depend on them */
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if (err2 == 0)
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continue;
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err3 = evaluate_variant(uc_mgr, cfg);
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if (err3 < 0)
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return err3;
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if (err3 == 0)
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continue;
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uc_mgr->macro_hops++;
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if (uc_mgr->macro_hops > 100) {
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uc_error("Maximal macro hops reached!");
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return -EINVAL;
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}
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err3 = evaluate_macro(uc_mgr, cfg);
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err4 = evaluate_macro(uc_mgr, cfg);
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uc_mgr->macro_hops--;
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if (err3 < 0)
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return err3;
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if (err3 == 0)
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continue;
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err4 = evaluate_condition(uc_mgr, cfg);
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if (err4 < 0)
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return err3;
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return err4;
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if (err4 == 0)
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continue;
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err5 = evaluate_condition(uc_mgr, cfg);
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if (err5 < 0)
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return err5;
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}
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return 0;
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}
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@ -1998,6 +2054,65 @@ static int parse_verb_file(snd_use_case_mgr_t *uc_mgr,
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return err;
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}
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/*
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* Parse variant information
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*/
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static int parse_variant(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg,
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char **_vfile, char **_vcomment)
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{
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snd_config_iterator_t i, next;
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snd_config_t *n;
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char *file = NULL, *comment = NULL;
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int err;
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/* parse master config sections */
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snd_config_for_each(i, next, cfg) {
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const char *id;
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n = snd_config_iterator_entry(i);
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if (snd_config_get_id(n, &id) < 0)
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continue;
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/* get use case verb file name */
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if (strcmp(id, "File") == 0) {
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if (_vfile) {
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err = parse_string_substitute3(uc_mgr, n, &file);
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if (err < 0) {
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uc_error("failed to get File");
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goto __error;
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}
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}
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continue;
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}
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/* get optional use case comment */
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if (strncmp(id, "Comment", 7) == 0) {
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if (_vcomment) {
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err = parse_string_substitute3(uc_mgr, n, &comment);
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if (err < 0) {
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uc_error("error: failed to get Comment");
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goto __error;
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}
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}
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continue;
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}
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uc_error("unknown field '%s' in Variant section", id);
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err = -EINVAL;
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goto __error;
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}
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if (_vfile)
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*_vfile = file;
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if (_vcomment)
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*_vcomment = comment;
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return 0;
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__error:
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free(file);
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free(comment);
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return err;
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}
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/*
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* Parse master section for "Use Case" and "File" tags.
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*/
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@ -2006,8 +2121,9 @@ static int parse_master_section(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg,
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void *data2 ATTRIBUTE_UNUSED)
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{
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snd_config_iterator_t i, next;
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snd_config_t *n;
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snd_config_t *n, *variant = NULL;
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char *use_case_name, *file = NULL, *comment = NULL;
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bool variant_ok = false;
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int err;
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if (snd_config_get_type(cfg) != SND_CONFIG_TYPE_COMPOUND) {
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@ -2022,7 +2138,9 @@ static int parse_master_section(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg,
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}
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/* in-place evaluation */
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uc_mgr->parse_master_section = 1;
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err = uc_mgr_evaluate_inplace(uc_mgr, cfg);
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uc_mgr->parse_master_section = 0;
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if (err < 0)
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goto __error;
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@ -2053,20 +2171,69 @@ static int parse_master_section(snd_use_case_mgr_t *uc_mgr, snd_config_t *cfg,
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continue;
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}
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uc_error("unknown field %s in master section");
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if (uc_mgr->conf_format >= 6 && strcmp(id, "Variant") == 0) {
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snd_config_iterator_t i2, next2;
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variant = n;
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snd_config_for_each(i2, next2, n) {
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const char *id2;
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snd_config_t *n2;
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n2 = snd_config_iterator_entry(i2);
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if (snd_config_get_id(n2, &id2) < 0)
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continue;
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err = uc_mgr_evaluate_inplace(uc_mgr, n2);
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if (err < 0)
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goto __error;
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if (strcmp(use_case_name, id2) == 0)
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variant_ok = true;
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}
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continue;
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}
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uc_error("unknown field '%s' in SectionUseCase", id);
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}
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uc_dbg("use_case_name %s file '%s'", use_case_name, file);
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/* do we have both use case name and file ? */
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if (!file) {
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uc_error("error: use case missing file");
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if (variant && !variant_ok) {
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uc_error("error: undefined variant '%s'", use_case_name);
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err = -EINVAL;
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goto __error;
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}
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/* parse verb file */
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err = parse_verb_file(uc_mgr, use_case_name, comment, file);
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if (!variant) {
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uc_dbg("use_case_name %s file '%s'", use_case_name, file);
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/* do we have both use case name and file ? */
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if (!file) {
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uc_error("error: use case missing file");
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err = -EINVAL;
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goto __error;
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}
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/* parse verb file */
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err = parse_verb_file(uc_mgr, use_case_name, comment, file);
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} else {
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/* parse variants */
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snd_config_for_each(i, next, variant) {
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char *vfile, *vcomment;
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const char *id;
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n = snd_config_iterator_entry(i);
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if (snd_config_get_id(n, &id) < 0)
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continue;
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if (!parse_is_name_safe(id)) {
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err = -EINVAL;
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goto __error;
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}
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err = parse_variant(uc_mgr, n, &vfile, &vcomment);
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if (err < 0)
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break;
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uc_mgr->parse_variant = id;
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err = parse_verb_file(uc_mgr, id,
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vcomment ? vcomment : comment,
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vfile ? vfile : file);
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uc_mgr->parse_variant = NULL;
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free(vfile);
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free(vcomment);
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}
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}
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__error:
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free(use_case_name);
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