Here's a patch that adds the idea of a stream "class" to alsa-streams. It's
against alsa-plugins-1.0.14a. All it does is prepend the name of the ALSA
stream with the class that you indicated. You can put a default class in the
asound.conf file, and also reconfigure it on the fly.
Asound.conf example:
pcm.pulse{
type pulse
class app
}
Runtime configuration example:
* 1:* int err;
* 2:* snd_config_t* classconf;
* 3:*
* 4:* snd_config_update();
* 5:* //you can replace "pulse" with "default" if pulse is set up
as your default device
* 6:* err=snd_config_search(snd_config, "pcm.pulse.class", &classconf);
* 7:*
* 8:* if(!err)
* 9:* snd_config_set_string(classconf, "alert");
*10:* else
*11:* {
*12:* snd_config_make(&classconf, "pcm.pulse.class",
SND_CONFIG_TYPE_STRING);
*13:* snd_config_set_string(classconf, "alert");
*14:* snd_config_add(snd_config, classconf);
*15:* }
Let me know if you have any problems or questions.
Justin
diff -Naur alsa-plugins-1.0.14/pulse/pcm_pulse.c alsa-plugins-1.0.14.patched/pulse/pcm_pulse.c
--- alsa-plugins-1.0.14/pulse/pcm_pulse.c 2007-05-31 01:06:51.000000000 -0700
+++ alsa-plugins-1.0.14.patched/pulse/pcm_pulse.c 2007-07-03 20:06:22.000000000 -0700
@@ -32,6 +32,7 @@
snd_pulse_t *p;
char *device;
+ char *class;
/* Since ALSA expects a ring buffer we must do some voodoo. */
size_t last_size;
@@ -430,6 +431,7 @@
pa_channel_map map;
snd_pcm_pulse_t *pcm = io->private_data;
int err = 0;
+ char* strmname;
assert(pcm);
assert(pcm->p);
@@ -450,12 +452,56 @@
assert(pcm->stream == NULL);
if (io->stream == SND_PCM_STREAM_PLAYBACK)
- pcm->stream = pa_stream_new(pcm->p->context, "ALSA Playback", &pcm->ss,
+ {
+ /*
+ * Added to support different "classes" that can be attenuated
+ * accordingly using module-match
+ */
+ if (pcm->class)
+ {
+ strmname = malloc(strlen(pcm->class)+14);
+ memset(strmname, 0, strlen(pcm->class) + 14);
+ strcat(strmname, pcm->class);
+ strcat(strmname, ":ALSA Playback");
+ }
+ else
+ {
+ strmname = malloc(13);
+ memset(strmname, 0, 13);
+ strcat(strmname, "ALSA Playback");
+ }
+ /*******End of additions*****/
+
+ pcm->stream = pa_stream_new(pcm->p->context, strmname, &pcm->ss,
pa_channel_map_init_auto(&map, pcm->ss.channels, PA_CHANNEL_MAP_ALSA));
+ free(strmname);
+ }
else
- pcm->stream = pa_stream_new(pcm->p->context, "ALSA Capture", &pcm->ss,
+ {
+ /*
+ * Added to support different "classes" that can be attenuated
+ * accordingly using module-match
+ */
+ if (pcm->class)
+ {
+ strmname = malloc(strlen(pcm->class)+13);
+ memset(strmname, 0, strlen(pcm->class) + 13);
+ strcat(strmname, pcm->class);
+ strcat(strmname, ":ALSA Capture");
+ }
+ else
+ {
+ strmname = malloc(12);
+ memset(strmname, 0, 12);
+ strcat(strmname, "ALSA Capture");
+ }
+ /*******End of additions*****/
+
+ pcm->stream = pa_stream_new(pcm->p->context, strmname, &pcm->ss,
pa_channel_map_init_auto(&map, pcm->ss.channels, PA_CHANNEL_MAP_ALSA));
assert(pcm->stream);
+ free(strmname);
+ }
pa_stream_set_state_callback(pcm->stream, pulse_stream_state_cb, pcm->p);
@@ -567,6 +613,9 @@
if (pcm->device)
free(pcm->device);
+ if (pcm->class)
+ free(pcm->class);
+
free(pcm);
return 0;
@@ -656,6 +705,7 @@
snd_config_iterator_t i, next;
const char *server = NULL;
const char *device = NULL;
+ const char *class = NULL;
int err;
snd_pcm_pulse_t *pcm;
@@ -680,6 +730,13 @@
}
continue;
}
+ if (strcmp(id, "class") == 0) {
+ if (snd_config_get_string(n, &class) < 0) {
+ SNDERR("Invalid type for %s", id);
+ return -EINVAL;
+ }
+ continue;
+ }
SNDERR("Unknown field %s", id);
return -EINVAL;
}
@@ -689,6 +746,9 @@
if (device)
pcm->device = strdup(device);
+ if (class)
+ pcm->class = strdup(class);
+
pcm->p = pulse_new();
if (!pcm->p) {
err = -EIO;
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