Remove guest side video time-stamping

The multimedia time is defined by the server side monotonic time [1],
but the drawing time-stamp is done in guest side, so it requires
synchronization between host and guest. This is expensive, when no audio
is playing, there is a ~30x/sec wakeup to update the qxl device mmtime,
and it requires marking dirty the rom region.

Instead, the video timestamping can be done more efficiently on server
side, without visible drawbacks.

[1] a better timestamp could be the audio time, since audio players are
    usually sync with audio time)

Related to:
https://bugzilla.redhat.com/show_bug.cgi?id=912763

1 files changed, 0 insertions, 9 deletions

diff --git a/server/red_dispatcher.c b/server/red_dispatcher.c
index a6ffe7be..d8389bc5 100644
--- a/server/red_dispatcher.c
+++ b/server/red_dispatcher.c
@@ -751,15 +751,6 @@ static void qxl_worker_loadvm_commands(QXLWorker *qxl_worker,
     red_dispatcher_loadvm_commands((RedDispatcher*)qxl_worker, ext, count);
 }
 
-void red_dispatcher_set_mm_time(uint32_t mm_time)
-{
-    RedDispatcher *now = dispatchers;
-    while (now) {
-        now->qxl->st->qif->set_mm_time(now->qxl, mm_time);
-        now = now->next;
-    }
-}
-
 static inline int calc_compression_level(void)
 {
     spice_assert(streaming_video != STREAM_VIDEO_INVALID);