[Spice-devel] [spice-protocol PATCH v4] audio: Do not volume-sync without audio

[Victor Toso]

In case audio backend is not initialized correctly or there isn't audio
in the VM, we should not try to volume-sync.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1257210
---
 src/channel-main.c | 6 ++++--
 src/spice-audio.c  | 4 ++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/channel-main.c b/src/channel-main.c
index f5115aa..145b081 100644
--- a/src/channel-main.c
+++ b/src/channel-main.c
@@ -1159,7 +1159,8 @@ static void agent_sync_audio_playback(SpiceMainChannel *main_channel)
     SpiceAudio *audio = spice_audio_get(session, NULL);
     SpiceMainChannelPrivate *c = main_channel->priv;
 
-    if (!test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
+    if (audio == NULL ||
+        !test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
         c->agent_volume_playback_sync == TRUE) {
         SPICE_DEBUG("%s - is not going to sync audio with guest", __func__);
         return;
@@ -1215,7 +1216,8 @@ static void agent_sync_audio_record(SpiceMainChannel *main_channel)
     SpiceAudio *audio = spice_audio_get(session, NULL);
     SpiceMainChannelPrivate *c = main_channel->priv;
 
-    if (!test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
+    if (audio == NULL ||
+        !test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
         c->agent_volume_record_sync == TRUE) {
         SPICE_DEBUG("%s - is not going to sync audio with guest", __func__);
         return;
diff --git a/src/spice-audio.c b/src/spice-audio.c
index ce191e1..3bf2217 100644
--- a/src/spice-audio.c
+++ b/src/spice-audio.c
@@ -197,6 +197,7 @@ void spice_audio_get_playback_volume_info_async(SpiceAudio *audio,
                                                 GAsyncReadyCallback callback,
                                                 gpointer user_data)
 {
+    g_return_if_fail (audio != NULL);
     SPICE_AUDIO_GET_CLASS(audio)->get_playback_volume_info_async(audio,
             cancellable, main_channel, callback, user_data);
 }
@@ -208,6 +209,7 @@ gboolean spice_audio_get_playback_volume_info_finish(SpiceAudio *audio,
                                                      guint16 **volume,
                                                      GError **error)
 {
+    g_return_val_if_fail (audio != NULL, FALSE);
     return SPICE_AUDIO_GET_CLASS(audio)->get_playback_volume_info_finish(audio,
             res, mute, nchannels, volume, error);
 }
@@ -218,6 +220,7 @@ void spice_audio_get_record_volume_info_async(SpiceAudio *audio,
                                               GAsyncReadyCallback callback,
                                               gpointer user_data)
 {
+    g_return_if_fail (audio != NULL);
     SPICE_AUDIO_GET_CLASS(audio)->get_record_volume_info_async(audio,
             cancellable, main_channel, callback, user_data);
 }
@@ -229,6 +232,7 @@ gboolean spice_audio_get_record_volume_info_finish(SpiceAudio *audio,
                                                    guint16 **volume,
                                                    GError **error)
 {
+    g_return_val_if_fail (audio != NULL, FALSE);
     return SPICE_AUDIO_GET_CLASS(audio)->get_record_volume_info_finish(audio,
             res, mute, nchannels, volume, error);
 }
-- 
2.4.3