bufferpool: Don't stop the pool in set_config()

Don't stop the pool in set_config(). Instead, let the controlling
element manage it. Most of the time, when an active pool is being
configured is because the caps didn't change.

https://bugzilla.gnome.org/show_bug.cgi?id=745377

2 files changed, 8 insertions, 34 deletions

diff --git a/gst/gstbufferpool.c b/gst/gstbufferpool.c
index 60cc77ca3..f8657909c 100644
--- a/gst/gstbufferpool.c
+++ b/gst/gstbufferpool.c
@@ -609,9 +609,9 @@ wrong_config:
  *
  * Set the configuration of the pool. If the pool is already configured, and
  * the configuration haven't change, this function will return %TRUE. If the
- * pool is active, this function will try deactivating it. Buffers allocated
- * form this pool must be returned or else this function will do nothing and
- * return %FALSE.
+ * pool is active, this method will return %FALSE and active configuration
+ * will remain. Buffers allocated form this pool must be returned or else this
+ * function will do nothing and return %FALSE.
  *
  * @config is a #GstStructure that contains the configuration parameters for
  * the pool. A default and mandatory set of parameters can be configured with
@@ -645,18 +645,8 @@ gst_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
     goto config_unchanged;
 
   /* can't change the settings when active */
-  if (priv->active) {
-    GST_BUFFER_POOL_UNLOCK (pool);
-    if (!gst_buffer_pool_set_active (pool, FALSE)) {
-      GST_BUFFER_POOL_LOCK (pool);
-      goto was_active;
-    }
-    GST_BUFFER_POOL_LOCK (pool);
-
-    /* not likely but as we released the lock */
-    if (priv->active)
-      goto was_active;
-  }
+  if (priv->active)
+    goto was_active;
 
   /* we can't change when outstanding buffers */
   if (g_atomic_int_get (&priv->outstanding) != 0)
@@ -694,7 +684,7 @@ config_unchanged:
 was_active:
   {
     gst_structure_free (config);
-    GST_WARNING_OBJECT (pool, "can't change config, we are active");
+    GST_INFO_OBJECT (pool, "can't change config, we are active");
     GST_BUFFER_POOL_UNLOCK (pool);
     return FALSE;
   }
diff --git a/tests/check/gst/gstbufferpool.c b/tests/check/gst/gstbufferpool.c
index 96769cb93..8dd265a13 100644
--- a/tests/check/gst/gstbufferpool.c
+++ b/tests/check/gst/gstbufferpool.c
@@ -179,7 +179,6 @@ GST_START_TEST (test_pool_activation_and_config)
   GstBufferPool *pool = gst_buffer_pool_new ();
   GstStructure *config = gst_buffer_pool_get_config (pool);
   GstCaps *caps = gst_caps_new_empty_simple ("test/data");
-  GstBuffer *buffer = NULL;
 
   /* unconfigured pool cannot be activated */
   fail_if (gst_buffer_pool_set_active (pool, TRUE));
@@ -192,26 +191,11 @@ GST_START_TEST (test_pool_activation_and_config)
   config = gst_buffer_pool_get_config (pool);
   fail_unless (gst_buffer_pool_set_config (pool, config));
 
-  /* setting a different config should deactivate the pool */
+  /* setting a different config on active pool should fail */
   config = gst_buffer_pool_get_config (pool);
   gst_buffer_pool_config_set_params (config, caps, 12, 10, 0);
-  fail_unless (gst_buffer_pool_set_config (pool, config));
-  fail_if (gst_buffer_pool_is_active (pool));
-
-  /* though it should fail if there is outstanding buffers */
-  gst_buffer_pool_set_active (pool, TRUE);
-  gst_buffer_pool_acquire_buffer (pool, &buffer, NULL);
-  fail_if (buffer == NULL);
-  config = gst_buffer_pool_get_config (pool);
-  gst_buffer_pool_config_set_params (config, caps, 10, 10, 0);
   fail_if (gst_buffer_pool_set_config (pool, config));
-
-  /* and work when last buffer is back */
-  config = gst_buffer_pool_get_config (pool);
-  gst_buffer_pool_config_set_params (config, caps, 10, 10, 0);
-  gst_buffer_unref (buffer);
-  fail_unless (gst_buffer_pool_set_config (pool, config));
-  fail_unless (gst_buffer_pool_set_active (pool, TRUE));
+  fail_unless (gst_buffer_pool_is_active (pool));
 
   gst_buffer_pool_set_active (pool, FALSE);
   gst_object_unref (pool);