From 77a1e3876bb11be79b32509d744136f89d76025f Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Sat, 4 Apr 2009 04:12:42 +0200
Subject: [PATCH] refuse to initialize on modem devices

---
 src/modules/alsa/alsa-sink.c   |  5 +++++
 src/modules/alsa/alsa-source.c |  5 +++++
 src/modules/alsa/alsa-util.c   | 12 ++++++++++++
 src/modules/alsa/alsa-util.h   |  2 ++
 4 files changed, 24 insertions(+)

diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c
index b43fa06..cdf1ca8 100644
--- a/src/modules/alsa/alsa-sink.c
+++ b/src/modules/alsa/alsa-sink.c
@@ -1617,6 +1617,11 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
     pa_assert(u->device_name);
     pa_log_info("Successfully opened device %s.", u->device_name);
 
+    if (pa_alsa_pcm_is_modem(u->pcm_handle)) {
+        pa_log_notice("Device %s is modem, refusing further initialization.", u->device_name);
+        goto fail;
+    }
+
     if (profile)
         pa_log_info("Selected configuration '%s' (%s).", profile->description, profile->name);
 
diff --git a/src/modules/alsa/alsa-source.c b/src/modules/alsa/alsa-source.c
index 348cd08..d9c6010 100644
--- a/src/modules/alsa/alsa-source.c
+++ b/src/modules/alsa/alsa-source.c
@@ -1469,6 +1469,11 @@ pa_source *pa_alsa_source_new(pa_module *m, pa_modargs *ma, const char*driver, p
     pa_assert(u->device_name);
     pa_log_info("Successfully opened device %s.", u->device_name);
 
+    if (pa_alsa_pcm_is_modem(u->pcm_handle)) {
+        pa_log_notice("Device %s is modem, refusing further initialization.", u->device_name);
+        goto fail;
+    }
+
     if (profile)
         pa_log_info("Selected configuration '%s' (%s).", profile->description, profile->name);
 
diff --git a/src/modules/alsa/alsa-util.c b/src/modules/alsa/alsa-util.c
index be8cd1c..870cf0f 100644
--- a/src/modules/alsa/alsa-util.c
+++ b/src/modules/alsa/alsa-util.c
@@ -1769,3 +1769,15 @@ pa_bool_t pa_alsa_pcm_is_hw(snd_pcm_t *pcm) {
 
     return snd_pcm_info_get_card(info) >= 0;
 }
+
+pa_bool_t pa_alsa_pcm_is_modem(snd_pcm_t *pcm) {
+    snd_pcm_info_t* info;
+    snd_pcm_info_alloca(&info);
+
+    pa_assert(pcm);
+
+    if (snd_pcm_info(pcm, info) < 0)
+        return FALSE;
+
+    return snd_pcm_info_get_class(info) == SND_PCM_CLASS_MODEM;
+}
diff --git a/src/modules/alsa/alsa-util.h b/src/modules/alsa/alsa-util.h
index 5cad295..94f27d1 100644
--- a/src/modules/alsa/alsa-util.h
+++ b/src/modules/alsa/alsa-util.h
@@ -141,4 +141,6 @@ char *pa_alsa_get_reserve_name(const char *device);
 
 pa_bool_t pa_alsa_pcm_is_hw(snd_pcm_t *pcm);
 
+pa_bool_t pa_alsa_pcm_is_modem(snd_pcm_t *pcm);
+
 #endif
-- 
2.7.4