[PATCH 2/2] mf/session: Fail start requests when no topology was set.

[Nikolay Sivov]

Signed-off-by: Nikolay Sivov 
---
 dlls/mf/session.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/dlls/mf/session.c b/dlls/mf/session.c
index 80cc8ab7135..0377b19c51f 100644
--- a/dlls/mf/session.c
+++ b/dlls/mf/session.c
@@ -841,6 +841,15 @@ static void session_start(struct media_session *session, const GUID *time_format
     switch (session->state)
     {
         case SESSION_STATE_STOPPED:
+
+            /* Start request with no current topology. */
+            if (session->presentation.topo_status == MF_TOPOSTATUS_INVALID)
+            {
+                session_command_complete_with_event(session, MESessionStarted, MF_E_INVALIDREQUEST, NULL);
+                break;
+            }
+
+            /* fallthrough */
         case SESSION_STATE_PAUSED:

session->presentation.time_format = *time_format;