dshowvideosrc: don't make a range if min==max

Fixes bug #625138

1 files changed, 28 insertions, 8 deletions

diff --git a/sys/dshowsrcwrapper/gstdshow.cpp b/sys/dshowsrcwrapper/gstdshow.cpp
index b916dccf6..b2d577b71 100644
--- a/sys/dshowsrcwrapper/gstdshow.cpp
+++ b/sys/dshowsrcwrapper/gstdshow.cpp
@@ -417,6 +417,9 @@ gst_dshow_new_video_caps (GstVideoFormat video_format, const gchar * name,
 {
   GstCaps *video_caps = NULL;
   GstStructure *video_structure = NULL;
+  gint min_w, max_w;
+  gint min_h, max_h;
+  gint min_fr, max_fr;
 
   /* raw video format */
   switch (video_format) {
@@ -462,14 +465,31 @@ gst_dshow_new_video_caps (GstVideoFormat video_format, const gchar * name,
   /* "The IAMStreamConfig::SetFormat method will set the frame rate to the closest  */
   /* value that the filter supports" as it said in the VIDEO_STREAM_CONFIG_CAPS dshwo doc */
 
-  gst_structure_set (video_structure,
-      "width", GST_TYPE_INT_RANGE, pin_mediatype->vscc.MinOutputSize.cx,
-      pin_mediatype->vscc.MaxOutputSize.cx, "height", GST_TYPE_INT_RANGE,
-      pin_mediatype->vscc.MinOutputSize.cy,
-      pin_mediatype->vscc.MaxOutputSize.cy, "framerate",
-      GST_TYPE_FRACTION_RANGE,
-      (gint) (10000000 / pin_mediatype->vscc.MaxFrameInterval), 1,
-      (gint) (10000000 / pin_mediatype->vscc.MinFrameInterval), 1, NULL);
+  min_w = pin_mediatype->vscc.MinOutputSize.cx;
+  max_w = pin_mediatype->vscc.MaxOutputSize.cx;
+  min_h = pin_mediatype->vscc.MinOutputSize.cy;
+  max_h = pin_mediatype->vscc.MaxOutputSize.cy;
+  min_fr = (gint) (10000000 / pin_mediatype->vscc.MaxFrameInterval);
+  max_fr = (gint)(10000000 / pin_mediatype->vscc.MinFrameInterval);
+
+  if (min_w == max_w)
+    gst_structure_set (video_structure, "width", G_TYPE_INT, min_w, NULL);
+  else
+     gst_structure_set (video_structure,
+       "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);
+
+  if (min_h == max_h)
+    gst_structure_set (video_structure, "height", G_TYPE_INT, min_h, NULL);
+  else
+     gst_structure_set (video_structure,
+       "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);
+
+  if (min_fr == max_fr)
+    gst_structure_set (video_structure, "framerate",
+        GST_TYPE_FRACTION, min_fr, 1, NULL);
+  else
+     gst_structure_set (video_structure, "framerate",
+         GST_TYPE_FRACTION_RANGE, min_fr, 1, max_fr, 1, NULL);
 
   return video_caps;
 }