add new function pa_alsa_get_driver_name()

diff --git a/src/modules/alsa/alsa-util.c b/src/modules/alsa/alsa-util.c
index 7e5a350..f23056a 100644 (file)
--- a/src/modules/alsa/alsa-util.c
+++ b/src/modules/alsa/alsa-util.c
@@ -31,6 +31,7 @@
 #include <pulse/sample.h>
 #include <pulse/xmalloc.h>
 #include <pulse/timeval.h>
+#include <pulse/util.h>
 
 #include <pulsecore/log.h>
 #include <pulsecore/macro.h>
@@ -1477,3 +1478,21 @@ int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas
 
     return r;
 }
+
+char *pa_alsa_get_driver_name(int card) {
+    char *t, *m, *n;
+
+    pa_assert(card >= 0);
+
+    t = pa_sprintf_malloc("/sys/class/sound/card%i/device/driver/module", card);
+    m = pa_readlink(t);
+    pa_xfree(t);
+
+    if (!m)
+        return NULL;
+
+    n = pa_xstrdup(pa_path_get_filename(m));
+    pa_xfree(m);
+
+    return n;
+}

diff --git a/src/modules/alsa/alsa-util.h b/src/modules/alsa/alsa-util.h
index f2d3278..8a20934 100644 (file)
--- a/src/modules/alsa/alsa-util.h
+++ b/src/modules/alsa/alsa-util.h
@@ -129,4 +129,6 @@ pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll);
 snd_pcm_sframes_t pa_alsa_safe_avail_update(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss);
 int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss);
 
+char *pa_alsa_get_driver_name(int card);
+
 #endif