vaapipostproc: get "interlaced" attribute from surface proxy.

Add new "interlaced" attribute to GstVaapiSurfaceProxy. Use this in
vaapipostproc so that to handles cases where bitstream is interlaced
but almost only frame pictures are generated. In this case, we should
not be alternating between top/bottom fields.

gst-libs/gst/vaapi/gstvaapidecoder_ffmpeg.c

@@ -496,7 +496,7 @@ render_frame(GstVaapiDecoderFfmpeg *decoder, AVFrame *frame)
         return GST_VAAPI_DECODER_STATUS_ERROR_INVALID_SURFACE;
 
     gst_vaapi_surface_proxy_set_timestamp(proxy, frame->pts);
-    if (frame->interlaced_frame)
+    gst_vaapi_surface_proxy_set_interlaced(proxy, !!frame->interlaced_frame);
     gst_vaapi_surface_proxy_set_tff(proxy, frame->top_field_first);
     gst_vaapi_decoder_push_surface_proxy(base_decoder, g_object_ref(proxy));
     return GST_VAAPI_DECODER_STATUS_SUCCESS;

gst-libs/gst/vaapi/gstvaapisurfaceproxy.c

@@ -43,7 +43,8 @@ struct _GstVaapiSurfaceProxyPrivate {
     GstVaapiContext    *context;
     GstVaapiSurface    *surface;
     GstClockTime        timestamp;
-    gboolean            tff;
+    guint               is_interlaced   : 1;
+    guint               tff             : 1;
 };
 
 enum {
@@ -52,6 +53,7 @@ enum {
     PROP_CONTEXT,
     PROP_SURFACE,
     PROP_TIMESTAMP,
+    PROP_INTERLACED,
     PROP_TFF
 };
 
@@ -86,6 +88,9 @@ gst_vaapi_surface_proxy_set_property(
     case PROP_TIMESTAMP:
         gst_vaapi_surface_proxy_set_timestamp(proxy, g_value_get_uint64(value));
         break;
+    case PROP_INTERLACED:
+        gst_vaapi_surface_proxy_set_interlaced(proxy, g_value_get_boolean(value));
+        break;
     case PROP_TFF:
         gst_vaapi_surface_proxy_set_tff(proxy, g_value_get_boolean(value));
         break;
@@ -115,6 +120,9 @@ gst_vaapi_surface_proxy_get_property(
     case PROP_TIMESTAMP:
         g_value_set_uint64(value, gst_vaapi_surface_proxy_get_timestamp(proxy));
         break;
+    case PROP_INTERLACED:
+        g_value_set_boolean(value, gst_vaapi_surface_proxy_get_interlaced(proxy));
+        break;
     case PROP_TFF:
         g_value_set_boolean(value, gst_vaapi_surface_proxy_get_tff(proxy));
         break;
@@ -160,6 +168,15 @@ gst_vaapi_surface_proxy_class_init(GstVaapiSurfaceProxyClass *klass)
                              0, G_MAXUINT64, GST_CLOCK_TIME_NONE,
                              G_PARAM_READWRITE));
 
+    g_object_class_install_property
+        (object_class,
+         PROP_INTERLACED,
+         g_param_spec_boolean("interlaced",
+                              "Interlaced",
+                              "Flag indicating whether surface is interlaced",
+                              FALSE,
+                              G_PARAM_READWRITE));
+
     g_object_class_install_property
         (object_class,
          PROP_TFF,
@@ -180,6 +197,7 @@ gst_vaapi_surface_proxy_init(GstVaapiSurfaceProxy *proxy)
     priv->context       = NULL;
     priv->surface       = NULL;
     priv->timestamp     = GST_CLOCK_TIME_NONE;
+    priv->is_interlaced = FALSE;
     priv->tff           = FALSE;
 }
 
@@ -351,6 +369,39 @@ gst_vaapi_surface_proxy_set_timestamp(
     proxy->priv->timestamp = timestamp;
 }
 
+/**
+ * gst_vaapi_surface_proxy_get_interlaced:
+ * @proxy: a #GstVaapiSurfaceProxy
+ *
+ * Returns whether the @proxy holds an interlaced #GstVaapiSurface or not.
+ *
+ * Return value: %TRUE if the underlying surface is interlaced, %FALSE
+ *     otherwise.
+ */
+gboolean
+gst_vaapi_surface_proxy_get_interlaced(GstVaapiSurfaceProxy *proxy)
+{
+    g_return_val_if_fail(GST_VAAPI_IS_SURFACE_PROXY(proxy), FALSE);
+
+    return proxy->priv->is_interlaced;
+}
+
+/**
+ * gst_vaapi_surface_proxy_set_interlaced:
+ * @proxy: a #GstVaapiSurfaceProxy
+ * @b: a boolean value
+ *
+ * Sets whether the underlying #GstVaapiSurface for @proxy is interlaced
+ * or not.
+ */
+void
+gst_vaapi_surface_proxy_set_interlaced(GstVaapiSurfaceProxy *proxy, gboolean b)
+{
+    g_return_if_fail(GST_VAAPI_IS_SURFACE_PROXY(proxy));
+
+    proxy->priv->is_interlaced = b;
+}
+
 /**
  * gst_vaapi_surface_proxy_get_tff:
  * @proxy: a #GstVaapiSurfaceProxy
@@ -364,7 +415,7 @@ gst_vaapi_surface_proxy_get_tff(GstVaapiSurfaceProxy *proxy)
 {
     g_return_val_if_fail(GST_VAAPI_IS_SURFACE_PROXY(proxy), FALSE);
 
-    return proxy->priv->tff;
+    return proxy->priv->is_interlaced && proxy->priv->tff;
 }
 
 /**

gst-libs/gst/vaapi/gstvaapisurfaceproxy.h

@@ -72,6 +72,15 @@ G_BEGIN_DECLS
 #define GST_VAAPI_SURFACE_PROXY_TIMESTAMP(surface) \
     gst_vaapi_surface_proxy_get_timestamp(surface)
 
+/**
+ * GST_VAAPI_SURFACE_PROXY_INTERLACED:
+ * @surface: a #GstVaapiSurfaceProxy
+ *
+ * Macro that evaluates to %TRUE if the @surface is interlaced.
+ */
+#define GST_VAAPI_SURFACE_PROXY_INTERLACED(surface) \
+    gst_vaapi_surface_proxy_get_interlaced(surface)
+
 /**
  * GST_VAAPI_SURFACE_PROXY_TFF:
  * @surface: a #GstVaapiSurfaceProxy
@@ -143,6 +152,12 @@ gst_vaapi_surface_proxy_set_timestamp(
     GstClockTime          timestamp
 );
 
+gboolean
+gst_vaapi_surface_proxy_get_interlaced(GstVaapiSurfaceProxy *proxy);
+
+void
+gst_vaapi_surface_proxy_set_interlaced(GstVaapiSurfaceProxy *proxy, gboolean b);
+
 gboolean
 gst_vaapi_surface_proxy_get_tff(GstVaapiSurfaceProxy *proxy);
 

gst/vaapi/gstvaapipostproc.c

@@ -239,8 +239,10 @@ gst_vaapipostproc_process(GstVaapiPostproc *postproc, GstBuffer *buf)
     GstClockTime timestamp;
     GstFlowReturn ret;
     GstBuffer *outbuf = NULL;
-    guint outbuf_flags, flags = 0;
+    guint outbuf_flags, flags;
-    gboolean tff;
+    gboolean interlaced, tff;
+
+    flags = gst_vaapi_video_buffer_get_render_flags(vbuf);
 
     /* Deinterlacing disabled, push frame */
     if (!postproc->deinterlace) {
@@ -253,8 +255,12 @@ gst_vaapipostproc_process(GstVaapiPostproc *postproc, GstBuffer *buf)
 
     timestamp  = GST_BUFFER_TIMESTAMP(buf);
     proxy      = gst_vaapi_video_buffer_get_surface_proxy(vbuf);
+    interlaced = gst_vaapi_surface_proxy_get_interlaced(proxy);
     tff        = gst_vaapi_surface_proxy_get_tff(proxy);
 
+    flags &= ~(GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD|
+               GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD);
+
     /* First field */
     outbuf = gst_vaapi_video_buffer_new_with_surface_proxy(proxy);
     if (!outbuf)
@@ -262,9 +268,11 @@ gst_vaapipostproc_process(GstVaapiPostproc *postproc, GstBuffer *buf)
 
     vbuf = GST_VAAPI_VIDEO_BUFFER(outbuf);
     outbuf_flags = flags;
-    outbuf_flags |= tff ?
+    outbuf_flags |= interlaced ? (
+        tff ?
         GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD :
-        GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD;
+        GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD) :
+        GST_VAAPI_PICTURE_STRUCTURE_FRAME;
     gst_vaapi_video_buffer_set_render_flags(vbuf, outbuf_flags);
 
     GST_BUFFER_TIMESTAMP(outbuf) = timestamp;
@@ -281,9 +289,11 @@ gst_vaapipostproc_process(GstVaapiPostproc *postproc, GstBuffer *buf)
 
     vbuf = GST_VAAPI_VIDEO_BUFFER(outbuf);
     outbuf_flags = flags;
-    outbuf_flags |= tff ?
+    outbuf_flags |= interlaced ? (
+        tff ?
         GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD :
-        GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD;
+        GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD) :
+        GST_VAAPI_PICTURE_STRUCTURE_FRAME;
     gst_vaapi_video_buffer_set_render_flags(vbuf, outbuf_flags);
 
     GST_BUFFER_TIMESTAMP(outbuf) = timestamp + postproc->field_duration;