va: postproc: Set one buffer in pools as minimum.

Because some elements, such as videorate check that minimum are
different of maximum number of buffers in the proposed pool, since
they might hold one or more buffers.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2102>

diff --git a/sys/va/gstvavpp.c b/sys/va/gstvavpp.c
index 3fa4f06..2851322 100644 (file)
--- a/sys/va/gstvavpp.c
+++ b/sys/va/gstvavpp.c
@@ -543,7 +543,7 @@ gst_va_vpp_propose_allocation (GstBaseTransform * trans,
         return FALSE;
     }
 
-    pool = _create_sinkpad_bufferpool (caps, size, 0, 0, usage_hint, allocator,
+    pool = _create_sinkpad_bufferpool (caps, size, 1, 0, usage_hint, allocator,
         &params);
     if (!pool) {
       gst_object_unref (allocator);
@@ -555,7 +555,7 @@ gst_va_vpp_propose_allocation (GstBaseTransform * trans,
     else
       gst_query_add_allocation_param (query, allocator, &params);
 
-    gst_query_add_allocation_pool (query, pool, size, 0, 0);
+    gst_query_add_allocation_pool (query, pool, size, 1, 0);
 
     GST_DEBUG_OBJECT (self,
         "proposing %" GST_PTR_FORMAT " with allocator %" GST_PTR_FORMAT,
@@ -649,7 +649,8 @@ gst_va_vpp_decide_allocation (GstBaseTransform * trans, GstQuery * query)
     gst_video_info_init (&vinfo);
     gst_video_info_from_caps (&vinfo, outcaps);
     size = GST_VIDEO_INFO_SIZE (&vinfo);
-    min = max = 0;
+    min = 1;
+    max = 0;
     update_pool = FALSE;
   }
 
@@ -1112,7 +1113,7 @@ _get_sinkpad_pool (GstVaVpp * self)
 
   allocator = _create_allocator (self, self->incaps, usage_hint);
 
-  self->sinkpad_pool = _create_sinkpad_bufferpool (self->incaps, size, 0, 0,
+  self->sinkpad_pool = _create_sinkpad_bufferpool (self->incaps, size, 1, 0,
       usage_hint, allocator, &params);
 
   if (GST_IS_VA_DMABUF_ALLOCATOR (allocator)) {