[PATCH] alsa-ucm: Fallback to stereo duplex

[david.henningsson@xxxxxxxxxxxxx (David Henningsson)]

If 'PlaybackChannels' and 'CaptureChannels' are absent in the UCM
file for a device, assume the device is stereo duplex.

Reported-by: Luke Yelavich <luke.yelavich at canonical.com>
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
---
 src/modules/alsa/alsa-ucm.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/modules/alsa/alsa-ucm.c b/src/modules/alsa/alsa-ucm.c
index 80e98ea..9e62dcb 100644
--- a/src/modules/alsa/alsa-ucm.c
+++ b/src/modules/alsa/alsa-ucm.c
@@ -247,7 +247,12 @@ static int ucm_get_device_property(
         }
     }
 
-    pa_assert(device->playback_channels || device->capture_channels);
+    if (device->playback_channels == 0 && device->capture_channels == 0) {
+        pa_log_warn("UCM file does not specify 'PlaybackChannels' or 'CaptureChannels'"
+                    "for device %s, assuming stereo duplex.", device_name);
+        device->playback_channels = 2;
+        device->capture_channels = 2;
+    }
 
     /* get priority of device */
     if (device->playback_channels) { /* sink device */
-- 
1.7.9.5