@@ -46,22 +46,68 @@ 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;
+#if !defined(SND_LIB_VER) || SND_LIB_VERSION < SND_LIB_VER(1, 2, 6)
+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);
@@ -71,7 +117,7 @@ void find_controls(void)
ksft_exit_fail();
}
- 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));
@@ -147,6 +193,8 @@ void find_controls(void)
break;
}
}
+
+ snd_config_delete(config);
}
/*
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. Cc: Mark Brown <broonie@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Takashi Sakamoto <o-takashi@sakamocchi.jp> Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Cc: linux-kselftest@vger.kernel.org Link: https://lore.kernel.org/alsa-devel/Ya7TAHdMe9i41bsC@workstation/ Signed-off-by: Jaroslav Kysela <perex@perex.cz> --- tools/testing/selftests/alsa/mixer-test.c | 50 ++++++++++++++++++++++- 1 file changed, 49 insertions(+), 1 deletion(-)