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alsa-mixer: add required-any and required-* for enum options

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Now you can add required-any to elements in a path and the path
will be valid as long as at least one of the elements are present.
Also you can have required, required-any and required-absent in
element options, causing a path to be unsupported if an option is
(not) present (simplified example: to skip line in path if
"Capture source" doesn't have a "Line In" option).

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
This commit is contained in:
David Henningsson 2010-12-20 12:29:27 +01:00 • committed by Colin Guthrie
parent 0ce3017b74
commit b0f72311cf
3 changed files with 91 additions and 12 deletions
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8
src/modules/alsa/alsa-mixer.h
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@ -112,6 +112,10 @@ struct pa_alsa_option {
char *name;
char *description;
unsigned priority;
pa_alsa_required_t required;
pa_alsa_required_t required_any;
pa_alsa_required_t required_absent;
};
/* And element wraps one specific ALSA element. A series of elements *
@ -129,6 +133,7 @@ struct pa_alsa_element {
pa_alsa_enumeration_use_t enumeration_use;
pa_alsa_required_t required;
pa_alsa_required_t required_any;
pa_alsa_required_t required_absent;
pa_bool_t override_map:1;
@ -164,6 +169,9 @@ struct pa_alsa_path {
pa_bool_t has_mute:1;
pa_bool_t has_volume:1;
pa_bool_t has_dB:1;
/* These two are used during probing only */
pa_bool_t has_req_any:1;
pa_bool_t req_any_present:1;
long min_volume, max_volume;
double min_dB, max_dB;