winegstreamer: Move the EOS handling from read_buffer() to the Unix library.

dlls/winegstreamer/gstdemux.c

@@ -794,14 +794,6 @@ static GstFlowReturn read_buffer(struct parser *This, guint64 ofs, guint len, Gs
 
     TRACE("filter %p, offset %s, length %u, buffer %p.\n", This, wine_dbgstr_longlong(ofs), len, buffer);
 
-    if (ofs >= This->file_size)
-    {
-        WARN("Reading past eof: %s, %u\n", wine_dbgstr_longlong(ofs), len);
-        return GST_FLOW_EOS;
-    }
-    if (len + ofs > This->file_size)
-        len = This->file_size - ofs;
-
     gst_buffer_map(buffer, &info, GST_MAP_WRITE);
     hr = IAsyncReader_SyncRead(This->reader, ofs, len, info.data);
     gst_buffer_unmap(buffer, &info);

dlls/winegstreamer/wg_parser.c

@@ -992,6 +992,10 @@ static GstFlowReturn request_buffer_src(GstPad *pad, GstObject *parent, guint64
     if (offset == GST_BUFFER_OFFSET_NONE)
         offset = parser->next_pull_offset;
     parser->next_pull_offset = offset + size;
+    if (offset >= parser->file_size)
+        return GST_FLOW_EOS;
+    if (offset + size >= parser->file_size)
+        size = parser->file_size - offset;
 
     if (!*buffer)
         *buffer = new_buffer = gst_buffer_new_and_alloc(size);