From 64fa5b882f53b24d78fd3c84191150000e79b391 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 30 May 2006 22:48:17 +0000
Subject: * alsa-sink: if "PCM" is not found as mixer track name, fallback to
 "Master" * alsa-source: if "Capture" is not found as mixer track name,
 fallback to "Mic"

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@993 fefdeb5f-60dc-0310-8127-8f9354f1896f
---
 src/modules/alsa-util.c          | 23 +++++++++++++++++------
 src/modules/alsa-util.h          |  2 +-
 src/modules/module-alsa-sink.c   |  2 +-
 src/modules/module-alsa-source.c |  2 +-
 4 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/src/modules/alsa-util.c b/src/modules/alsa-util.c
index 22e623f6..be0fc064 100644
--- a/src/modules/alsa-util.c
+++ b/src/modules/alsa-util.c
@@ -337,18 +337,29 @@ int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev) {
     return 0;
 }
 
-snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name) {
+snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name, const char *fallback) {
     snd_mixer_elem_t *elem;
-    snd_mixer_selem_id_t *sid;
+    snd_mixer_selem_id_t *sid = NULL;
     snd_mixer_selem_id_alloca(&sid);
 
-    assert(mixer && name);
+    assert(mixer);
+    assert(name);
 
     snd_mixer_selem_id_set_name(sid, name);
 
-    elem = snd_mixer_find_selem(mixer, sid);
-    if (!elem)
-        pa_log_warn(__FILE__": Cannot find mixer control %s", snd_mixer_selem_id_get_name(sid));
+    if (!(elem = snd_mixer_find_selem(mixer, sid))) {
+        pa_log_warn(__FILE__": Cannot find mixer control \"%s\".", snd_mixer_selem_id_get_name(sid));
+
+        if (fallback) {
+            snd_mixer_selem_id_set_name(sid, fallback);
+            
+            if (!(elem = snd_mixer_find_selem(mixer, sid)))
+                pa_log_warn(__FILE__": Cannot find fallback mixer control \"%s\".", snd_mixer_selem_id_get_name(sid));
+        }
+    }
+
+    if (elem)
+        pa_log_warn(__FILE__": Using mixer control \"%s\".", snd_mixer_selem_id_get_name(sid));
 
     return elem;
 }
diff --git a/src/modules/alsa-util.h b/src/modules/alsa-util.h
index 4bee8625..83d1481f 100644
--- a/src/modules/alsa-util.h
+++ b/src/modules/alsa-util.h
@@ -40,6 +40,6 @@ int pa_alsa_fdlist_init_mixer(struct pa_alsa_fdlist *fdl, snd_mixer_t *mixer_han
 int pa_alsa_set_hw_params(snd_pcm_t *pcm_handle, pa_sample_spec *ss, uint32_t *periods, snd_pcm_uframes_t *period_size);
 
 int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev);
-snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name);
+snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name, const char *fallback);
 
 #endif
diff --git a/src/modules/module-alsa-sink.c b/src/modules/module-alsa-sink.c
index a0b6dc08..620047b7 100644
--- a/src/modules/module-alsa-sink.c
+++ b/src/modules/module-alsa-sink.c
@@ -373,7 +373,7 @@ int pa__init(pa_core *c, pa_module*m) {
     }
 
     if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
-        !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "PCM"))) {
+        !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "PCM", "Master"))) {
         snd_mixer_close(u->mixer_handle);
         u->mixer_handle = NULL;
     }
diff --git a/src/modules/module-alsa-source.c b/src/modules/module-alsa-source.c
index 10b98f75..0999c65f 100644
--- a/src/modules/module-alsa-source.c
+++ b/src/modules/module-alsa-source.c
@@ -366,7 +366,7 @@ int pa__init(pa_core *c, pa_module*m) {
     }
 
     if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
-        !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture"))) {
+        !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture", "Mic"))) {
         snd_mixer_close(u->mixer_handle);
         u->mixer_handle = NULL;
     }
-- 
cgit