mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-03 09:01:52 -05:00
ucm: implement the toplevel ucm configuration file parser
There is a big issue to validate all possible configuration paths. Let create ucm2/ucm.conf file which describe the lookups. It may be also customized later to follow the kernel-side development. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela
parent
61986c02b0
commit
1b0e77909d
1 changed files with 231 additions and 149 deletions
380
src/ucm/parser.c
380
src/ucm/parser.c
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@ -62,66 +62,20 @@ static int parse_sequence(snd_use_case_mgr_t *uc_mgr,
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snd_config_t *cfg);
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/*
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* compose configuration file
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* compose the absolute ucm filename
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*/
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static void configuration_filename2(char *fn, size_t fn_len, int format,
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const char *dir, const char *file,
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const char *suffix)
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static void ucm_filename(char *fn, size_t fn_len, long version,
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const char *dir, const char *file)
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{
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snprintf(fn, fn_len, "%s/ucm%s/%s/%s%s",
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snd_config_topdir(), format >= 2 ? "2" : "",
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dir, file, suffix);
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}
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const char *env = getenv(version > 1 ? ALSA_CONFIG_UCM2_VAR : ALSA_CONFIG_UCM_VAR);
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static void configuration_filename(snd_use_case_mgr_t *uc_mgr,
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char *fn, size_t fn_len,
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const char *dir, const char *file,
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const char *suffix)
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{
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const char *env;
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if (uc_mgr->conf_format > 0) {
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/* known format */
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env = getenv(uc_mgr->conf_format >= 2 ? ALSA_CONFIG_UCM2_VAR :
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ALSA_CONFIG_UCM_VAR);
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} else {
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/* auto-detect */
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env = getenv(ALSA_CONFIG_UCM2_VAR);
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if (env == NULL) {
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env = getenv(ALSA_CONFIG_UCM_VAR);
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if (env)
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uc_mgr->conf_format = 1;
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} else {
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uc_mgr->conf_format = 2;
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}
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}
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if (env) {
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snprintf(fn, fn_len, "%s/%s/%s%s", env, dir, file, suffix);
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return;
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}
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if (uc_mgr->conf_format > 0) {
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configuration_filename2(fn, fn_len, uc_mgr->conf_format,
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dir, file, suffix);
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return;
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}
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configuration_filename2(fn, fn_len, 2, dir, file, suffix);
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if (access(fn, R_OK) == 0) {
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/* Found an ucm2 file, only look in the ucm2 dir from now on */
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uc_mgr->conf_format = 2;
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return;
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}
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configuration_filename2(fn, fn_len, 0, dir, file, suffix);
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if (access(fn, R_OK) == 0) {
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/* Found an ucm1 file, only look in the ucm dir from now on */
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uc_mgr->conf_format = 1;
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return;
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}
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/* make sure that the error message refers to the new path */
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configuration_filename2(fn, fn_len, 2, dir, file, suffix);
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if (env == NULL)
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snprintf(fn, fn_len, "%s/%s/%s%s%s",
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snd_config_topdir(), version > 1 ? "ucm2" : "ucm",
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dir ?: "", dir ? "/" : "", file);
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else
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snprintf(fn, fn_len, "%s/%s%s%s",
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env, dir ?: "", dir ? "/" : "", file);
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}
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/*
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@ -133,9 +87,9 @@ int uc_mgr_config_load_file(snd_use_case_mgr_t *uc_mgr,
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char filename[PATH_MAX];
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int err;
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configuration_filename(uc_mgr, filename, sizeof(filename),
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file[0] == '/' ? "" : uc_mgr->conf_dir_name,
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file, "");
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ucm_filename(filename, sizeof(filename), uc_mgr->conf_format,
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file[0] == '/' ? NULL : uc_mgr->conf_dir_name,
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file);
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err = uc_mgr_config_load(uc_mgr->conf_format, filename, cfg);
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if (err < 0) {
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uc_error("error: failed to open file %s : %d", filename, -errno);
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@ -150,7 +104,7 @@ int uc_mgr_config_load_file(snd_use_case_mgr_t *uc_mgr,
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static char *replace_string(char **dst, const char *value)
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{
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free(*dst);
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*dst = strdup(value);
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*dst = value ? strdup(value) : NULL;
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return *dst;
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}
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@ -1909,10 +1863,9 @@ static int get_card_info(snd_use_case_mgr_t *mgr,
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return err;
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}
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/* find the card in the local machine and store the card long name */
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static int get_card_long_name(snd_use_case_mgr_t *mgr, char *longname)
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/* find the card in the local machine */
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static int get_by_card_name(snd_use_case_mgr_t *mgr, const char *card_name)
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{
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const char *card_name = mgr->card_name;
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int card, err;
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snd_ctl_t *ctl;
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snd_ctl_card_info_t *info;
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@ -1929,7 +1882,7 @@ static int get_card_long_name(snd_use_case_mgr_t *mgr, char *longname)
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while (card >= 0) {
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char name[32];
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/* most probably, we do not need to cache all CTL devices here */
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/* mandatory - clear the list, keep the only one CTL device */
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uc_mgr_free_ctl_list(mgr);
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sprintf(name, "hw:%d", card);
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@ -1941,10 +1894,8 @@ static int get_card_long_name(snd_use_case_mgr_t *mgr, char *longname)
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_long_name = snd_ctl_card_info_get_longname(info);
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if (!strcmp(card_name, _driver) ||
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!strcmp(card_name, _name) ||
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!strcmp(card_name, _long_name)) {
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snd_strlcpy(longname, _long_name, MAX_CARD_LONG_NAME);
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!strcmp(card_name, _long_name))
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return 0;
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}
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}
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if (snd_card_next(&card) < 0) {
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@ -1959,11 +1910,10 @@ static int get_card_long_name(snd_use_case_mgr_t *mgr, char *longname)
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}
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/* set the driver name and long name by the card ctl name */
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static int get_by_card(snd_use_case_mgr_t *mgr, const char *ctl_name, char *longname)
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static int get_by_card(snd_use_case_mgr_t *mgr, const char *ctl_name)
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{
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snd_ctl_t *ctl;
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snd_ctl_card_info_t *info;
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const char *_driver, *_long_name;
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int err;
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snd_ctl_card_info_alloca(&info);
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@ -1972,114 +1922,246 @@ static int get_by_card(snd_use_case_mgr_t *mgr, const char *ctl_name, char *long
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if (err)
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return err;
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_driver = snd_ctl_card_info_get_driver(info);
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if (replace_string(&mgr->conf_dir_name, _driver) == NULL)
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return -ENOMEM;
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_long_name = snd_ctl_card_info_get_longname(info);
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snd_strlcpy(longname, _long_name, MAX_CARD_LONG_NAME);
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return 0;
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}
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static int load_master_config(snd_use_case_mgr_t *uc_mgr,
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const char *card_name, snd_config_t **cfg, int longname)
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static int parse_toplevel_path(snd_use_case_mgr_t *uc_mgr,
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char *filename,
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snd_config_t *cfg)
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{
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char filename[PATH_MAX];
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snd_config_iterator_t i, next, i2, next2;
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snd_config_t *n, *n2;
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const char *id;
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char *dir = NULL, *file = NULL, fn[PATH_MAX];
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long version;
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int err;
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if (strnlen(card_name, MAX_CARD_LONG_NAME) == MAX_CARD_LONG_NAME) {
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uc_error("error: invalid card name %s (at most %d chars)",
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card_name, MAX_CARD_LONG_NAME - 1);
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if (snd_config_get_type(cfg) != SND_CONFIG_TYPE_COMPOUND) {
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uc_error("compound type expected for UseCasePath node");
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return -EINVAL;
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}
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uc_mgr->conf_format = 0;
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if (longname) {
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if (getenv(ALSA_CONFIG_UCM2_VAR) || !getenv(ALSA_CONFIG_UCM_VAR)) {
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uc_mgr->conf_format = 2;
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configuration_filename(uc_mgr, filename, sizeof(filename),
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uc_mgr->conf_dir_name, card_name, ".conf");
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if (access(filename, R_OK) == 0)
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goto __load;
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/* parse use case path config sections */
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snd_config_for_each(i, next, cfg) {
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n = snd_config_iterator_entry(i);
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if (snd_config_get_type(n) != SND_CONFIG_TYPE_COMPOUND) {
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uc_error("compound type expected for UseCasePath.something node");
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return -EINVAL;
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}
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/* try the old ucm directory */
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uc_mgr->conf_format = 1;
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configuration_filename(uc_mgr, filename, sizeof(filename),
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card_name, card_name, ".conf");
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if (access(filename, R_OK) != 0)
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return -ENOENT;
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} else {
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configuration_filename(uc_mgr, filename, sizeof(filename),
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card_name, card_name, ".conf");
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if (snd_config_get_id(n, &id) < 0)
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continue;
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version = 2;
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/* parse use case path config sections */
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snd_config_for_each(i2, next2, n) {
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n2 = snd_config_iterator_entry(i2);
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if (snd_config_get_id(n2, &id) < 0)
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continue;
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if (strcmp(id, "Version") == 0) {
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err = parse_integer_substitute(uc_mgr, n2, &version);
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if (err < 0) {
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uc_error("unable to parse UcmDirectory");
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goto __error;
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}
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if (version < 1 || version > 2) {
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uc_error("Version must be 1 or 2");
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err = -EINVAL;
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goto __error;
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}
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continue;
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}
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if (strcmp(id, "Directory") == 0) {
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err = parse_string_substitute(uc_mgr, n2, &dir);
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if (err < 0) {
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uc_error("unable to parse Directory");
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goto __error;
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}
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continue;
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}
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if (strcmp(id, "File") == 0) {
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err = parse_string_substitute(uc_mgr, n2, &file);
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if (err < 0) {
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uc_error("unable to parse File");
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goto __error;
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}
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continue;
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}
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uc_error("unknown UseCasePath field %s", id);
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}
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if (dir == NULL) {
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uc_error("Directory is not defined in %s!", filename);
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free(file);
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continue;
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}
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if (file == NULL) {
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uc_error("File is not defined in %s!", filename);
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free(dir);
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continue;
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}
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ucm_filename(fn, sizeof(fn), version, dir, file);
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if (access(fn, R_OK) == 0) {
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if (replace_string(&uc_mgr->conf_dir_name, dir) == NULL) {
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err = -ENOMEM;
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goto __error;
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}
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if (replace_string(&uc_mgr->conf_file_name, file) == NULL) {
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err = -ENOMEM;
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goto __error;
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}
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strncpy(filename, fn, PATH_MAX);
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uc_mgr->conf_format = version;
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goto __ok;
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}
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free(file);
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free(dir);
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dir = NULL;
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file = NULL;
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}
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__load:
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err = -ENOENT;
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goto __error;
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__ok:
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err = 0;
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__error:
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free(file);
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free(dir);
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return err;
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}
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static int parse_toplevel_config(snd_use_case_mgr_t *uc_mgr,
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char *filename,
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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;
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const char *id;
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long l;
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int err;
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if (snd_config_get_type(cfg) != SND_CONFIG_TYPE_COMPOUND) {
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uc_error("compound type expected for toplevel file");
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return -EINVAL;
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}
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err = snd_config_search(cfg, "Syntax", &n);
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if (err < 0) {
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uc_error("Syntax field not found in %s", filename);
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return -EINVAL;
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}
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err = snd_config_get_integer(n, &l);
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if (err < 0) {
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uc_error("Syntax field is invalid in %s", filename);
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return err;
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}
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if (l < 2 || l > SYNTAX_VERSION_MAX) {
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uc_error("Incompatible syntax %d in %s", l, filename);
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return -EINVAL;
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}
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/* delete this field to avoid strcmp() call in the loop */
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snd_config_delete(n);
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uc_mgr->conf_format = l;
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/* in-place evaluation */
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err = uc_mgr_evaluate_inplace(uc_mgr, cfg);
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if (err < 0)
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return err;
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/* parse toplevel config sections */
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snd_config_for_each(i, next, cfg) {
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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 (strcmp(id, "UseCasePath") == 0) {
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err = parse_toplevel_path(uc_mgr, filename, n);
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if (err == 0)
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return err;
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continue;
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}
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uc_error("uknown toplevel field %s", id);
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}
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return -ENOENT;
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}
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static int load_toplevel_config(snd_use_case_mgr_t *uc_mgr,
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snd_config_t **cfg)
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{
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char filename[PATH_MAX];
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snd_config_t *tcfg;
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int err;
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ucm_filename(filename, sizeof(filename), 2, NULL, "ucm.conf");
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if (access(filename, R_OK) != 0) {
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uc_error("Unable to find the top-level configuration file '%s'.", filename);
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return -ENOENT;
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}
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err = uc_mgr_config_load(2, filename, &tcfg);
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if (err < 0)
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goto __error;
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/* filename is shared for function input and output! */
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err = parse_toplevel_config(uc_mgr, filename, tcfg);
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snd_config_delete(tcfg);
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if (err < 0)
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goto __error;
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err = uc_mgr_config_load(uc_mgr->conf_format, filename, cfg);
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if (err < 0) {
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uc_error("error: could not parse configuration for card %s",
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card_name);
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return err;
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uc_mgr->card_name);
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goto __error;
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}
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if (replace_string(&uc_mgr->conf_file_name, card_name) == NULL)
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return -ENOMEM;
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return 0;
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__error:
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return err;
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}
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/* load master use case file for sound card
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*
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* The same ASoC machine driver can be shared by many different devices.
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* For user space to differentiate them and get the best device-specific
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* configuration, ASoC machine drivers may use the DMI info
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* (vendor-product-version-board) as the card long name. And user space can
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* define configuration files like longnamei/longname.conf for a specific device.
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*
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* This function will try to find the card in the local machine and get its
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* long name, then load the file longname/longname.conf to get the best
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* device-specific configuration. If the card is not found in the local
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* machine or the device-specific file is not available, fall back to load
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* the default configuration file name/name.conf.
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/* load master use case file for sound card based on rules in ucm2/ucm.conf
|
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*/
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int uc_mgr_import_master_config(snd_use_case_mgr_t *uc_mgr)
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{
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snd_config_t *cfg;
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const char *name = uc_mgr->card_name;
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char longname[MAX_CARD_LONG_NAME];
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const char *name;
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int err;
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if (replace_string(&uc_mgr->conf_dir_name,
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strncmp(name, "strict:", 7) ? name : name + 7) == NULL)
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return -ENOMEM;
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name = uc_mgr->card_name;
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if (strncmp(name, "hw:", 3) == 0) {
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err = get_by_card(uc_mgr, name, longname);
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if (err == 0)
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goto __longname;
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uc_error("card '%s' is not valid", name);
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goto __error;
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err = get_by_card(uc_mgr, name);
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if (err < 0) {
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uc_error("card '%s' is not valid", name);
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goto __error;
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}
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} else if (strncmp(name, "strict:", 7)) {
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err = get_card_long_name(uc_mgr, longname);
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if (err == 0) { /* load file that matches the card long name */
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__longname:
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err = load_master_config(uc_mgr, longname, &cfg, 1);
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}
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if (err == 0) {
|
||||
/* got device-specific file that matches the card long name */
|
||||
if (uc_mgr->conf_format < 2)
|
||||
snd_strlcpy(uc_mgr->conf_dir_name, longname,
|
||||
sizeof(uc_mgr->conf_dir_name));
|
||||
goto __parse;
|
||||
}
|
||||
/* do not handle the error here */
|
||||
/* we can refer the virtual UCM config */
|
||||
get_by_card_name(uc_mgr, name);
|
||||
} else {
|
||||
name += 7;
|
||||
}
|
||||
|
||||
/* standard path */
|
||||
err = load_master_config(uc_mgr, uc_mgr->conf_dir_name, &cfg, 0);
|
||||
err = load_toplevel_config(uc_mgr, &cfg);
|
||||
if (err < 0)
|
||||
goto __error;
|
||||
|
||||
__parse:
|
||||
err = parse_master_file(uc_mgr, cfg);
|
||||
snd_config_delete(cfg);
|
||||
if (err < 0) {
|
||||
|
|
@ -2091,7 +2173,7 @@ __parse:
|
|||
|
||||
__error:
|
||||
uc_mgr_free_ctl_list(uc_mgr);
|
||||
uc_mgr->conf_dir_name[0] = '\0';
|
||||
replace_string(&uc_mgr->conf_dir_name, NULL);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
@ -2136,7 +2218,7 @@ static int is_component_directory(const char *dir)
|
|||
*/
|
||||
int uc_mgr_scan_master_configs(const char **_list[])
|
||||
{
|
||||
char filename[PATH_MAX], dfl[PATH_MAX];
|
||||
char filename[PATH_MAX], dfl[PATH_MAX], fn[FILENAME_MAX];
|
||||
char *env = getenv(ALSA_CONFIG_UCM2_VAR);
|
||||
const char **list, *d_name;
|
||||
snd_config_t *cfg, *c;
|
||||
|
|
@ -2193,8 +2275,8 @@ int uc_mgr_scan_master_configs(const char **_list[])
|
|||
if (is_component_directory(d_name))
|
||||
continue;
|
||||
|
||||
configuration_filename2(filename, sizeof(filename), 2,
|
||||
d_name, d_name, ".conf");
|
||||
snprintf(fn, sizeof(fn), "%s.conf", d_name);
|
||||
ucm_filename(filename, sizeof(filename), 2, d_name, fn);
|
||||
if (eaccess(filename, R_OK))
|
||||
continue;
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue