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pulseaudio-13.0
0016-alsa-ucm-add-comments-to-ucm_get_mixer_id....
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File 0016-alsa-ucm-add-comments-to-ucm_get_mixer_id.patch of Package pulseaudio-13.0
From f5c02dfcd821ab77fc7f91da985254a7bdb658ad Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela <perex@perex.cz> Date: Wed, 4 Dec 2019 16:29:51 +0100 Subject: [PATCH] alsa-ucm: add comments to ucm_get_mixer_id() Signed-off-by: Jaroslav Kysela <perex@perex.cz> --- src/modules/alsa/alsa-ucm.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/modules/alsa/alsa-ucm.c b/src/modules/alsa/alsa-ucm.c index 221fed719284..3ee271845c19 100644 --- a/src/modules/alsa/alsa-ucm.c +++ b/src/modules/alsa/alsa-ucm.c @@ -241,7 +241,7 @@ static char *ucm_get_mixer_id( const char *cprop, const char *cid) { -#if SND_LIB_VERSION >= 0x10201 +#if SND_LIB_VERSION >= 0x10201 /* alsa-lib-1.2.1+ check */ snd_ctl_elem_id_t *ctl; int err; #endif @@ -249,13 +249,17 @@ static char *ucm_get_mixer_id( char *value2; int index; + /* mixer element as first, if it's found, return it without modifications */ value = pa_proplist_gets(device->proplist, mprop); if (value) return pa_xstrdup(value); + /* fallback, get the control element identifier */ + /* and try to do some heuristic to determine the mixer element name */ value = pa_proplist_gets(device->proplist, cprop); if (value == NULL) return NULL; -#if SND_LIB_VERSION >= 0x10201 +#if SND_LIB_VERSION >= 0x10201 /* alsa-lib-1.2.1+ check */ + /* The new parser may return also element index. */ snd_ctl_elem_id_alloca(&ctl); err = snd_use_case_parse_ctl_elem_id(ctl, cid, value); if (err < 0) -- 2.16.4
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