[PATCH v4 4/5] mf: Initialise the grabber sample count when setting state after a seek.

[Conor McCarthy]

From: Conor McCarthy

If sample_count is zero in this case, we end up with no samples being
requested.
---
 dlls/mf/samplegrabber.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dlls/mf/samplegrabber.c b/dlls/mf/samplegrabber.c
index de599139736..4d54afc1d31 100644
--- a/dlls/mf/samplegrabber.c
+++ b/dlls/mf/samplegrabber.c
@@ -1195,6 +1195,10 @@ static HRESULT sample_grabber_set_state(struct sample_grabber *grabber, enum sin

if (state == SINK_STATE_RUNNING && grabber->state != SINK_STATE_RUNNING)
             {
+                /* Unpause at a position is a seek operation which drops everything pending. */
+                if (grabber->state == SINK_STATE_PAUSED && offset != PRESENTATION_CURRENT_POSITION)
+                    grabber->sample_count = MAX_SAMPLE_QUEUE_LENGTH;
+
                 /* Every transition to running state sends a bunch requests to build up initial queue. */
                 for (i = 0; i < grabber->sample_count; ++i)
                 {