[PATCH v2 1/5] winegstreamer: Require media source's IMFByteStream to be seekable.

[Derek Lesho]

If there is ever a need to support an un-seekable bytestream, we'll have to use GstAppSrc.

Signed-off-by: Derek Lesho <dlesho at codeweavers.com>
---
 dlls/winegstreamer/media_source.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/winegstreamer/media_source.c b/dlls/winegstreamer/media_source.c
index dbc656a24da..df5dedd484d 100644
--- a/dlls/winegstreamer/media_source.c
+++ b/dlls/winegstreamer/media_source.c
@@ -1232,6 +1232,7 @@ static HRESULT media_source_constructor(IMFByteStream *bytestream, struct media_
 
     struct media_source *object = heap_alloc_zero(sizeof(*object));
     IMFStreamDescriptor **descriptors = NULL;
+    DWORD bytestream_caps;
     unsigned int i;
     HRESULT hr;
     int ret;
@@ -1239,6 +1240,12 @@ static HRESULT media_source_constructor(IMFByteStream *bytestream, struct media_
     if (!object)
         return E_OUTOFMEMORY;
 
+    if (FAILED(hr = IMFByteStream_GetCapabilities(bytestream, &bytestream_caps)))
+        return hr;
+
+    if (!(bytestream_caps & MFBYTESTREAM_IS_SEEKABLE))
+        return MF_E_BYTESTREAM_NOT_SEEKABLE;
+
     object->IMFMediaSource_iface.lpVtbl = &IMFMediaSource_vtbl;
     object->async_commands_callback.lpVtbl = &source_async_commands_callback_vtbl;
     object->ref = 1;
-- 
2.28.0