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authorMax Kellermann <max@duempel.org>2009-10-20 22:10:56 +0200
committerMax Kellermann <max@duempel.org>2009-10-20 22:10:56 +0200
commit4e2fb3fb89b8b80d5366466f391f21386120019e (patch)
treeb483ed23c73afbbefcba86c1ce0d2b8c4afa824b /src/mixer/alsa_mixer_plugin.c
parent9cd2129eeb22280836e87bfa12389adf4ddb2488 (diff)
downloadmpd-4e2fb3fb89b8b80d5366466f391f21386120019e.tar.gz
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mixer_plugin: use GError for error handling
Diffstat (limited to '')
-rw-r--r--src/mixer/alsa_mixer_plugin.c55
1 files changed, 36 insertions, 19 deletions
diff --git a/src/mixer/alsa_mixer_plugin.c b/src/mixer/alsa_mixer_plugin.c
index 1a32ea9e1..0f23bc03f 100644
--- a/src/mixer/alsa_mixer_plugin.c
+++ b/src/mixer/alsa_mixer_plugin.c
@@ -42,8 +42,18 @@ struct alsa_mixer {
int volume_set;
};
+/**
+ * The quark used for GError.domain.
+ */
+static inline GQuark
+alsa_mixer_quark(void)
+{
+ return g_quark_from_static_string("alsa_mixer");
+}
+
static struct mixer *
-alsa_mixer_init(const struct config_param *param)
+alsa_mixer_init(const struct config_param *param,
+ G_GNUC_UNUSED GError **error_r)
{
struct alsa_mixer *am = g_new(struct alsa_mixer, 1);
@@ -81,7 +91,7 @@ alsa_mixer_close(struct mixer *data)
}
static bool
-alsa_mixer_open(struct mixer *data)
+alsa_mixer_open(struct mixer *data, GError **error_r)
{
struct alsa_mixer *am = (struct alsa_mixer *)data;
int err;
@@ -91,29 +101,33 @@ alsa_mixer_open(struct mixer *data)
err = snd_mixer_open(&am->handle, 0);
if (err < 0) {
- g_warning("problems opening alsa mixer: %s\n", snd_strerror(err));
+ g_set_error(error_r, alsa_mixer_quark(), err,
+ "snd_mixer_open() failed: %s", snd_strerror(err));
return false;
}
if ((err = snd_mixer_attach(am->handle, am->device)) < 0) {
- g_warning("problems attaching alsa mixer: %s\n",
- snd_strerror(err));
alsa_mixer_close(data);
+ g_set_error(error_r, alsa_mixer_quark(), err,
+ "failed to attach to %s: %s",
+ am->device, snd_strerror(err));
return false;
}
if ((err = snd_mixer_selem_register(am->handle, NULL,
NULL)) < 0) {
- g_warning("problems snd_mixer_selem_register'ing: %s\n",
- snd_strerror(err));
alsa_mixer_close(data);
+ g_set_error(error_r, alsa_mixer_quark(), err,
+ "snd_mixer_selem_register() failed: %s",
+ snd_strerror(err));
return false;
}
if ((err = snd_mixer_load(am->handle)) < 0) {
- g_warning("problems snd_mixer_selem_register'ing: %s\n",
- snd_strerror(err));
alsa_mixer_close(data);
+ g_set_error(error_r, alsa_mixer_quark(), err,
+ "snd_mixer_load() failed: %s\n",
+ snd_strerror(err));
return false;
}
@@ -138,14 +152,14 @@ alsa_mixer_open(struct mixer *data)
return true;
}
- g_warning("can't find alsa mixer control \"%s\"\n", am->control);
-
alsa_mixer_close(data);
+ g_set_error(error_r, alsa_mixer_quark(), 0,
+ "no such mixer control: %s", am->control);
return false;
}
static int
-alsa_mixer_get_volume(struct mixer *mixer)
+alsa_mixer_get_volume(struct mixer *mixer, GError **error_r)
{
struct alsa_mixer *am = (struct alsa_mixer *)mixer;
int err;
@@ -156,8 +170,9 @@ alsa_mixer_get_volume(struct mixer *mixer)
err = snd_mixer_handle_events(am->handle);
if (err < 0) {
- g_warning("problems getting alsa volume: %s (snd_mixer_%s)\n",
- snd_strerror(err), "handle_events");
+ g_set_error(error_r, alsa_mixer_quark(), err,
+ "snd_mixer_handle_events() failed: %s",
+ snd_strerror(err));
return false;
}
@@ -165,8 +180,9 @@ alsa_mixer_get_volume(struct mixer *mixer)
SND_MIXER_SCHN_FRONT_LEFT,
&level);
if (err < 0) {
- g_warning("problems getting alsa volume: %s (snd_mixer_%s)\n",
- snd_strerror(err), "selem_get_playback_volume");
+ g_set_error(error_r, alsa_mixer_quark(), err,
+ "failed to read ALSA volume: %s",
+ snd_strerror(err));
return false;
}
@@ -183,7 +199,7 @@ alsa_mixer_get_volume(struct mixer *mixer)
}
static bool
-alsa_mixer_set_volume(struct mixer *mixer, unsigned volume)
+alsa_mixer_set_volume(struct mixer *mixer, unsigned volume, GError **error_r)
{
struct alsa_mixer *am = (struct alsa_mixer *)mixer;
float vol;
@@ -203,8 +219,9 @@ alsa_mixer_set_volume(struct mixer *mixer, unsigned volume)
err = snd_mixer_selem_set_playback_volume_all(am->elem, level);
if (err < 0) {
- g_warning("problems setting alsa volume: %s\n",
- snd_strerror(err));
+ g_set_error(error_r, alsa_mixer_quark(), err,
+ "failed to set ALSA volume: %s",
+ snd_strerror(err));
return false;
}