change the alsa dev.d script that runs on udev add events to a program

that:
a) runs alsactl restore if there is a saved config b) unmutes playback
    channels if there isn't
#132575

alsa-utils.spec

@@ -1,12 +1,12 @@
 Summary: 	Advanced Linux Sound Architecture (ALSA) utilities
 Name: 		alsa-utils
 Version: 	1.0.8
-Release:	3
+Release:	4
 License: 	GPL
 Group: 		Applications/Multimedia
 URL: 		http://www.alsa-project.org/
 Source: 	ftp://ftp.alsa-project.org/pub/utils/alsa-utils-%{version}%{?prever}.tar.bz2
-Source2:	alsa.dev
+Source2:	salsa.c
 #Source3:	xinit-alsa-launch.sh
 #Patch1:	alsa-utils-1.0.7-alsa-launch.patch
 BuildRoot: 	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@@ -28,6 +28,7 @@ Architecture (ALSA).
 autoreconf -f -i
 %configure CFLAGS="$RPM_OPT_FLAGS" --sbindir=/sbin 
 %{__make} %{?_smp_mflags}
+%{__cc} $RPM_OPT_FLAGS -o salsa %{SOURCE2} -lasound
 
 %install
 %{__rm} -rf ${RPM_BUILD_ROOT}
@@ -40,7 +41,7 @@ mkdir -p $RPM_BUILD_ROOT/%{_sbindir}
 ln -s ../../sbin/alsactl $RPM_BUILD_ROOT/%{_sbindir}/alsactl
 
 mkdir -p -m755 $RPM_BUILD_ROOT/etc/dev.d/sound
-install -m 755 %{SOURCE2} $RPM_BUILD_ROOT/etc/dev.d/sound/alsa.dev
+install -m 755 salsa $RPM_BUILD_ROOT/etc/dev.d/sound/alsa.dev
 
 %clean
 %{__rm} -rf $RPM_BUILD_ROOT
@@ -59,6 +60,11 @@ install -m 755 %{SOURCE2} $RPM_BUILD_ROOT/etc/dev.d/sound/alsa.dev
 
 
 %changelog
+* Fri Apr 1 2005 Bill Nottingham <notting@redhat.com> 1.0.8-4
+- replace the dev.d script with a program that calls alsactl to
+  restore the volume if there is a saved config, and just unmutes
+  the playback channels if there isn't one (#132575)
+
 * Mon Mar 7 2005 Martin Stransky <stransky@redhat.com>
 - rebuilt
 

salsa.c

@@ -0,0 +1,147 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <alsa/asoundlib.h>
+
+#define ALSA_CONFIG_PATH	"/etc/asound.state"
+
+int get_card_number()
+{
+	char *devname, *action;
+	
+	action = getenv("ACTION");
+	if (!action || strcmp(action,"add"))
+		return -1;
+	devname = getenv("DEVNAME");
+	if (!devname)
+		return -1;
+	if (!strncmp(devname,"/dev/snd/controlC",17))
+		return atoi(devname+17);
+	if (!strncmp(devname,"/dev/snd/pcmC",13))
+		return atoi(devname+13);
+	return -1;
+}
+
+int has_config(int index)
+{
+	int rc = 0;
+	snd_config_t *config, *control;
+	snd_input_t *in;
+	snd_ctl_t *handle;
+        snd_ctl_card_info_t *info;
+	const char *id;
+	char path[32];
+	
+	rc = snd_config_top(&config);
+	if (rc < 0)
+		goto out;
+	rc = snd_input_stdio_open(&in, ALSA_CONFIG_PATH, "r");
+	if (rc >= 0) {
+		rc = snd_config_load(config, in);
+		snd_input_close(in);
+		if (rc < 0)
+			goto out;
+	}
+	sprintf(path, "hw:%d", index);
+	rc = snd_ctl_open(&handle, path, 0);
+	if (rc < 0) 
+		goto out;
+	snd_ctl_card_info_alloca(&info);
+	rc = snd_ctl_card_info(handle, info);
+	if (rc < 0)
+		goto out_close;
+	id = snd_ctl_card_info_get_id(info);
+	rc = snd_config_searchv(config, &control, "state", id, "control", 0);
+out_close:
+	snd_ctl_close(handle);
+out:
+	return !rc;
+	
+}
+
+int run_alsactl(int index)
+{
+	char *args[] = { "/sbin/alsactl", "restore", NULL, NULL };
+	char num[10];
+	
+	sprintf(num,"%d",index);
+	args[2] = num;
+	execv(args[0],args);
+        return 1;
+}
+
+int frob_mixer(int index)
+{
+	int rc = 0;
+	char card[32];
+	snd_mixer_t *handle;
+	snd_mixer_selem_id_t *sid;
+	snd_mixer_elem_t *elem;
+	snd_mixer_selem_id_alloca(&sid);
+	
+	sprintf(card,"hw:%d",index);
+	if ((rc = snd_mixer_open(&handle, 0)) < 0) {
+		return rc;
+	}
+	if ((rc = snd_mixer_attach(handle, card)) < 0) {
+		goto out;
+	}
+	if ((rc = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
+		goto out;
+	}
+	rc = snd_mixer_load(handle);
+	if (rc < 0) {
+		goto out;
+	}
+	for (elem = snd_mixer_first_elem(handle); elem; elem = snd_mixer_elem_next(elem)) {
+		long pmin, pmax;
+		int c;
+		
+		snd_mixer_selem_get_id(elem, sid);
+		snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
+		for (c = 0; c < SND_MIXER_SCHN_LAST; c++) {
+			if (snd_mixer_selem_has_capture_channel(elem, c)) {
+				if (snd_mixer_selem_has_capture_volume(elem))
+					snd_mixer_selem_set_capture_volume(elem, c, 0);
+				if (!strcmp(snd_mixer_selem_id_get_name(sid),"CD")) {
+					if (snd_mixer_selem_has_capture_switch(elem))
+						snd_mixer_selem_set_capture_switch(elem, c, 1);
+				} else {
+					if (snd_mixer_selem_has_capture_switch(elem))
+						snd_mixer_selem_set_capture_switch(elem, c, 0);
+					if (snd_mixer_selem_has_playback_switch(elem))
+						snd_mixer_selem_set_playback_switch(elem, c, 0);
+					if (snd_mixer_selem_has_playback_volume(elem))
+						snd_mixer_selem_set_playback_volume(elem, c, 0);
+				} 
+			}
+			if (snd_mixer_selem_has_playback_channel(elem, c)) {
+				if (!snd_mixer_selem_has_capture_channel(elem, c) ||
+				    !strcmp(snd_mixer_selem_id_get_name(sid),"CD")) {
+					if (snd_mixer_selem_has_playback_switch(elem))
+						snd_mixer_selem_set_playback_switch(elem, c, 1);
+					if (snd_mixer_selem_has_playback_volume(elem))
+						snd_mixer_selem_set_playback_volume(elem, c, pmin + (pmax - pmin) * 0.75);
+				}
+			}
+		}
+	}
+out:
+	snd_mixer_close(handle);
+	return rc;
+}
+
+int main(int argc, char **argv)
+{
+	int i;
+	
+	i = get_card_number();
+	if (i < 0)
+		return 0;
+	if (has_config(i))
+		return run_alsactl(i);
+	else
+		return frob_mixer(i);
+}