vaapipostproc: allow user defined scaling mode.

Add new "scale-method" property to expose the scaling mode to use during
video processing. Note that this is only a hint, and the actual behaviour
may differ from implementation (VA driver) to implementation.

2 files changed, 27 insertions, 0 deletions

diff --git a/gst/vaapi/gstvaapipostproc.c b/gst/vaapi/gstvaapipostproc.c
index fa6ffe5d..bcddea6e 100644
--- a/gst/vaapi/gstvaapipostproc.c
+++ b/gst/vaapi/gstvaapipostproc.c
@@ -122,6 +122,7 @@ enum {
     PROP_SATURATION,
     PROP_BRIGHTNESS,
     PROP_CONTRAST,
+    PROP_SCALE_METHOD,
 };
 
 #define DEFAULT_FORMAT                  GST_VIDEO_FORMAT_ENCODED
@@ -559,6 +560,11 @@ gst_vaapipostproc_process_vpp(GstBaseTransform *trans, GstBuffer *inbuf,
             postproc->contrast))
         return GST_FLOW_NOT_SUPPORTED;
 
+    if ((postproc->flags & GST_VAAPI_POSTPROC_FLAG_SCALE) &&
+        !gst_vaapi_filter_set_scaling(postproc->filter,
+            postproc->scale_method))
+        return GST_FLOW_NOT_SUPPORTED;
+
     inbuf_meta = gst_buffer_get_vaapi_video_meta(inbuf);
     if (!inbuf_meta)
         goto error_invalid_buffer;
@@ -1439,6 +1445,10 @@ gst_vaapipostproc_set_property(
         postproc->contrast = g_value_get_float(value);
         postproc->flags |= GST_VAAPI_POSTPROC_FLAG_CONTRAST;
         break;
+    case PROP_SCALE_METHOD:
+        postproc->scale_method = g_value_get_enum(value);
+        postproc->flags |= GST_VAAPI_POSTPROC_FLAG_SCALE;
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
         break;
@@ -1492,6 +1502,9 @@ gst_vaapipostproc_get_property(
     case PROP_CONTRAST:
         g_value_set_float(value, postproc->contrast);
         break;
+    case PROP_SCALE_METHOD:
+        g_value_set_enum(value, postproc->scale_method);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
         break;
@@ -1705,6 +1718,17 @@ gst_vaapipostproc_class_init(GstVaapiPostprocClass *klass)
         g_object_class_install_property(object_class,
             PROP_CONTRAST, filter_op->pspec);
 
+    /**
+     * GstVaapiPostproc:scale-method:
+     *
+     * The scaling method to use, expressed as an enum value. See
+     * #GstVaapiScaleMethod.
+     */
+    filter_op = find_filter_op(filter_ops, GST_VAAPI_FILTER_OP_SCALING);
+    if (filter_op)
+        g_object_class_install_property(object_class,
+            PROP_SCALE_METHOD, filter_op->pspec);
+
     g_ptr_array_unref(filter_ops);
 }
 
diff --git a/gst/vaapi/gstvaapipostproc.h b/gst/vaapi/gstvaapipostproc.h
index c27b29a1..af6fdf9d 100644
--- a/gst/vaapi/gstvaapipostproc.h
+++ b/gst/vaapi/gstvaapipostproc.h
@@ -93,6 +93,7 @@ typedef enum {
  * @GST_VAAPI_POSTPROC_FLAG_CONTRAST: Change contrast.
  * @GST_VAAPI_POSTPROC_FLAG_DEINTERLACE: Deinterlacing.
  * @GST_VAAPI_POSTPROC_FLAG_SIZE: Video scaling.
+ * @GST_VAAPI_POSTPROC_FLAG_SCALE: Video scaling mode.
  *
  * The set of operations that are to be performed for each frame.
  */
@@ -105,6 +106,7 @@ typedef enum {
     GST_VAAPI_POSTPROC_FLAG_BRIGHTNESS  = 1 << GST_VAAPI_FILTER_OP_BRIGHTNESS,
     GST_VAAPI_POSTPROC_FLAG_CONTRAST    = 1 << GST_VAAPI_FILTER_OP_CONTRAST,
     GST_VAAPI_POSTPROC_FLAG_DEINTERLACE = 1 << GST_VAAPI_FILTER_OP_DEINTERLACING,
+    GST_VAAPI_POSTPROC_FLAG_SCALE       = 1 << GST_VAAPI_FILTER_OP_SCALING,
 
     /* Additional custom flags */
     GST_VAAPI_POSTPROC_FLAG_CUSTOM      = 1 << 20,
@@ -162,6 +164,7 @@ struct _GstVaapiPostproc {
     gfloat                      sharpen_level;
 
     /* Color balance filter values */
+    GstVaapiScaleMethod         scale_method;
     gfloat                      hue;
     gfloat                      saturation;
     gfloat                      brightness;