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kselftest: alsa: Use private alsa-lib configuration in mixer test

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As mentined by Takashi Sakamoto, the system-wide alsa-lib configuration
may override the standard device declarations. This patch use the private
alsa-lib configuration to set the predictable environment.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20211208095209.1772296-1-perex@perex.cz
[Restructure version test to keep the preprocessor happy -- broonie]
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211210185410.740009-4-broonie@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jaroslav Kysela 2021-12-10 18:54:10 +00:00 committed by Takashi Iwai
parent 7cc994f27e
commit b73dad8065
1 changed files with 55 additions and 1 deletions
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56
tools/testing/selftests/alsa/mixer-test.c
View File

@ -46,22 +46,74 @@ struct ctl_data {
struct ctl_data *next;
};
static const char *alsa_config =
"ctl.hw {\n"
" @args [ CARD ]\n"
" @args.CARD.type string\n"
" type hw\n"
" card $CARD\n"
"}\n"
;
int num_cards = 0;
int num_controls = 0;
struct card_data *card_list = NULL;
struct ctl_data *ctl_list = NULL;
#ifdef SND_LIB_VER
#if SND_LIB_VERSION >= SND_LIB_VER(1, 2, 6)
#define LIB_HAS_LOAD_STRING
#endif
#endif
#ifndef LIB_HAS_LOAD_STRING
int snd_config_load_string(snd_config_t **config, const char *s, size_t size)
{
snd_input_t *input;
snd_config_t *dst;
int err;
assert(config && s);
if (size == 0)
size = strlen(s);
err = snd_input_buffer_open(&input, s, size);
if (err < 0)
return err;
err = snd_config_top(&dst);
if (err < 0) {
snd_input_close(input);
return err;
}
err = snd_config_load(dst, input);
snd_input_close(input);
if (err < 0) {
snd_config_delete(dst);
return err;
}
*config = dst;
return 0;
}
#endif
void find_controls(void)
{
char name[32];
int card, ctl, err;
struct card_data *card_data;
struct ctl_data *ctl_data;
snd_config_t *config;
card = -1;
if (snd_card_next(&card) < 0 || card < 0)
return;
err = snd_config_load_string(&config, alsa_config, strlen(alsa_config));
if (err < 0) {
ksft_print_msg("Unable to parse custom alsa-lib configuration: %s\n",
snd_strerror(err));
ksft_exit_fail();
}
while (card >= 0) {
sprintf(name, "hw:%d", card);
@ -69,7 +121,7 @@ void find_controls(void)
if (!card_data)
ksft_exit_fail_msg("Out of memory\n");
err = snd_ctl_open(&card_data->handle, name, 0);
err = snd_ctl_open_lconf(&card_data->handle, name, 0, config);
if (err < 0) {
ksft_print_msg("Failed to get hctl for card %d: %s\n",
card, snd_strerror(err));
@ -137,6 +189,8 @@ void find_controls(void)
break;
}
}
snd_config_delete(config);
}
/*