va: Refactor _change_resolution() to _update_frame_size().

Rename gst_va_decoder_change_resolution() to
gst_va_decoder_update_frame_size() which resembles
gst_va_decoder_set_frame_size().

Also added a comment to clarify the function use and makes more
specific the error message.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2417>

3 files changed, 6 insertions, 4 deletions

diff --git a/sys/va/gstvadecoder.c b/sys/va/gstvadecoder.c
index 3993a32e1..44d4e6dbf 100644
--- a/sys/va/gstvadecoder.c
+++ b/sys/va/gstvadecoder.c
@@ -354,8 +354,10 @@ gst_va_decoder_set_frame_size (GstVaDecoder * self, gint coded_width,
       coded_height, NULL);
 }
 
+/* This function is only used by codecs where frame size can change
+ * without a context reset, as for example VP9 */
 gboolean
-gst_va_decoder_change_resolution (GstVaDecoder * self, gint coded_width,
+gst_va_decoder_update_frame_size (GstVaDecoder * self, gint coded_width,
     gint coded_height)
 {
   g_return_val_if_fail (GST_IS_VA_DECODER (self), FALSE);
@@ -368,7 +370,7 @@ gst_va_decoder_change_resolution (GstVaDecoder * self, gint coded_width,
   GST_OBJECT_LOCK (self);
   if (self->context == VA_INVALID_ID) {
     GST_OBJECT_UNLOCK (self);
-    GST_INFO_OBJECT (self, "decoder does not have a format");
+    GST_INFO_OBJECT (self, "decoder does not have a context");
     return FALSE;
   }
   GST_OBJECT_UNLOCK (self);
diff --git a/sys/va/gstvadecoder.h b/sys/va/gstvadecoder.h
index 3b91f33c1..60bb63d0c 100644
--- a/sys/va/gstvadecoder.h
+++ b/sys/va/gstvadecoder.h
@@ -52,7 +52,7 @@ gboolean              gst_va_decoder_set_frame_size_with_surfaces
 gboolean              gst_va_decoder_set_frame_size       (GstVaDecoder * self,
                                                            gint coded_width,
                                                            gint coded_height);
-gboolean              gst_va_decoder_change_resolution    (GstVaDecoder * self,
+gboolean              gst_va_decoder_update_frame_size    (GstVaDecoder * self,
                                                            gint coded_width,
                                                            gint coded_height);
 GstCaps *             gst_va_decoder_get_srcpad_caps      (GstVaDecoder * self);
diff --git a/sys/va/gstvavp9dec.c b/sys/va/gstvavp9dec.c
index d12fbc9df..dcecd8dae 100644
--- a/sys/va/gstvavp9dec.c
+++ b/sys/va/gstvavp9dec.c
@@ -557,7 +557,7 @@ gst_va_vp9_dec_negotiate (GstVideoDecoder * decoder)
       return FALSE;
 
     if (base->profile == cur_profile && base->rt_format == cur_rtformat) {
-      if (!gst_va_decoder_change_resolution (base->decoder, base->width,
+      if (!gst_va_decoder_update_frame_size (base->decoder, base->width,
               base->height))
         return FALSE;