[client v14 29/29] spice-gtk: Use decodebin as a fallback for the GStreamer video decoder

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This means future video codecs may be supported automatically.
One can also force usage of decodebin by setting $SPICE_GSTVIDEO_AUTO.

Signed-off-by: Francois Gouget <fgouget@xxxxxxxxxxxxxxx>
---
 src/channel-display-gst.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/channel-display-gst.c b/src/channel-display-gst.c
index 8934371..0253367 100644
--- a/src/channel-display-gst.c
+++ b/src/channel-display-gst.c
@@ -245,8 +245,20 @@ static gboolean create_pipeline(SpiceGstDecoder *decoder)
         gstdec_name = "h264parse ! avdec_h264";
         break;
     default:
-        spice_warning("Unknown codec type %d", decoder->base.codec_type);
-        return -1;
+        SPICE_DEBUG("Unknown codec type %d. Trying decodebin.",
+                    decoder->base.codec_type);
+        src_caps = "";
+        gstdec_name = NULL;
+        break;
+    }
+
+    /* decodebin will use vaapi if installed, which for a time could
+     * intentionally crash the application. So only use decodebin as a
+     * fallback or when SPICE_GSTVIDEO_AUTO is set.
+     * See: https://bugs.freedesktop.org/show_bug.cgi?id=90884
+     */
+    if (!gstdec_name || getenv("SPICE_GSTVIDEO_AUTO")) {
+        gstdec_name = "decodebin";
     }
 
     /* - We schedule the frame display ourselves so set sync=false on appsink
-- 
2.8.0.rc3
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