[PATCH v2 16/18] winegstreamer: Calculate the MF_PD_DURATION of the media source's PD.

[Derek Lesho]

Signed-off-by: Derek Lesho 
---
 dlls/winegstreamer/media_source.c | 40 +++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/dlls/winegstreamer/media_source.c b/dlls/winegstreamer/media_source.c
index e6effa0429..4e87546f13 100644
--- a/dlls/winegstreamer/media_source.c
+++ b/dlls/winegstreamer/media_source.c
@@ -1264,6 +1264,46 @@ static HRESULT media_source_constructor(IMFByteStream *bytestream, enum source_t
     CloseHandle(This->init_complete_event);
     This->init_complete_event = NULL;

+    /* miscelaneous presentation descriptor setup */
+    {
+        IMFAttributes *byte_stream_attributes;
+        gint64 total_pres_time = 0;
+
+        if (SUCCEEDED(IMFByteStream_QueryInterface(This->byte_stream, &IID_IMFAttributes, (void **)&byte_stream_attributes)))
+        {
+            WCHAR *mimeW = NULL;
+            DWORD length;
+            if (SUCCEEDED(IMFAttributes_GetAllocatedString(byte_stream_attributes, &MF_BYTESTREAM_CONTENT_TYPE, &mimeW, &length)))
+            {
+                IMFPresentationDescriptor_SetString(This->pres_desc, &MF_PD_MIME_TYPE, mimeW);
+                CoTaskMemFree(mimeW);
+            }
+            IMFAttributes_Release(byte_stream_attributes);
+        }
+
+        for (unsigned int i = 0; i < This->stream_count; i++)
+        {
+            GstQuery *query = gst_query_new_duration(GST_FORMAT_TIME);
+            if (gst_pad_query(This->streams[i]->their_src, query))
+            {
+                gint64 stream_pres_time;
+                gst_query_parse_duration(query, NULL, &stream_pres_time);
+
+                TRACE("Stream %u has duration %lu\n", i, stream_pres_time);
+
+                if (stream_pres_time > total_pres_time)
+                    total_pres_time = stream_pres_time;
+            }
+            else
+            {
+                WARN("Unable to get presentation time of stream %u\n", i);
+            }
+        }
+
+        if (This->stream_count)
+            IMFPresentationDescriptor_SetUINT64(This->pres_desc, &MF_PD_DURATION, total_pres_time / 100);
+    }
+
     gst_element_set_state(This->container, GST_STATE_READY);
     if (!(This->pres_desc))
     {