[PATCH v2 2/5] mf: Drop transform node input events when unpausing at a specific position.

[Conor McCarthy]

From: Conor McCarthy

The start position is empty when starting at the current position from
the paused state, but if it is not empty, this is a seek operation.
---
 dlls/mf/session.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/dlls/mf/session.c b/dlls/mf/session.c
index e595cadd185..876dd6eb95c 100644
--- a/dlls/mf/session.c
+++ b/dlls/mf/session.c
@@ -1061,7 +1061,7 @@ static void session_handle_start_error(struct media_session *session, HRESULT hr
     session_command_complete_with_event(session, MESessionStarted, hr, NULL);
 }

-static void session_reset_transforms(struct media_session *session)
+static void session_reset_transforms(struct media_session *session, BOOL drop)
 {
     struct topo_node *topo_node;
     UINT i;
@@ -1071,10 +1071,15 @@ static void session_reset_transforms(struct media_session *session)
         if (topo_node->type != MF_TOPOLOGY_TRANSFORM_NODE)
             continue;

+        if (drop)
+            IMFTransform_ProcessMessage(topo_node->object.transform, MFT_MESSAGE_COMMAND_FLUSH, 0);
+
         for (i = 0; i < topo_node->u.transform.input_count; i++)
         {
             struct transform_stream *stream = &topo_node->u.transform.inputs[i];
             stream->draining = FALSE;
+            if (drop)
+                transform_stream_drop_events(stream);
         }
     }
 }
@@ -1119,7 +1124,7 @@ static void session_start(struct media_session *session, const GUID *time_format
                 }
             }

-            session_reset_transforms(session);
+            session_reset_transforms(session, start_position->vt == VT_I8);

session->state = SESSION_STATE_STARTING_SOURCES;
             break;