va: h265dec: Set Screen Content extension (SCC) for picture parameters.

We already declare the support of HEVC screen content extension profiles
in the profile mapping list, but we fail to generate the correct VA picture
parameters buffers. This may cause the GPU hang.

We need to fill the buffer of VAPictureParameterBufferHEVCExtension correctly.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2255>

diff --git a/sys/va/gstvah265dec.c b/sys/va/gstvah265dec.c
index 94507ef..795e87d 100644 (file)
--- a/sys/va/gstvah265dec.c
+++ b/sys/va/gstvah265dec.c
@@ -123,6 +123,17 @@ _is_range_extension_profile (VAProfile profile)
   return FALSE;
 }
 
+static gboolean
+_is_screen_content_ext_profile (VAProfile profile)
+{
+  if (profile == VAProfileHEVCSccMain
+      || profile == VAProfileHEVCSccMain10
+      || profile == VAProfileHEVCSccMain444)
+    return TRUE;
+
+  return FALSE;
+}
+
 static inline void
 _set_last_slice_flag (GstVaH265Dec * self)
 {
@@ -166,7 +177,8 @@ _submit_previous_slice (GstVaBaseDec * base, GstVaDecodePicture * va_pic)
   if (!slice->data || slice->size == 0)
     return FALSE;
 
-  param_size = _is_range_extension_profile (self->parent.profile) ?
+  param_size = _is_range_extension_profile (self->parent.profile)
+      || _is_screen_content_ext_profile (self->parent.profile) ?
       sizeof (slice->param) : sizeof (slice->param.base);
   ret = gst_va_decoder_add_slice_buffer (base->decoder, va_pic, &slice->param,
       param_size, slice->data, slice->size);
@@ -514,7 +526,8 @@ gst_va_h265_dec_decode_slice (GstH265Decoder * decoder,
   };
   /* *INDENT-ON* */
 
-  if (_is_range_extension_profile (base->profile)) {
+  if (_is_range_extension_profile (base->profile)
+      || _is_screen_content_ext_profile (base->profile)) {
     /* *INDENT-OFF* */
     slice_param->rext = (VASliceParameterBufferHEVCRext) {
       .slice_ext_flags.bits = {
@@ -579,6 +592,55 @@ _fill_picture_range_ext_parameter (GstVaH265Dec * decoder,
       sizeof (pic_param->cr_qp_offset_list));
 }
 
+static void
+_fill_screen_content_ext_parameter (GstVaH265Dec * decoder,
+    GstH265SPS * sps, GstH265PPS * pps)
+{
+  VAPictureParameterBufferHEVCScc *pic_param = &decoder->pic_param.scc;
+  const GstH265PPSSccExtensionParams *pps_scc = &pps->pps_scc_extension_params;
+  const GstH265SPSSccExtensionParams *sps_scc = &sps->sps_scc_extension_params;
+  guint32 num_comps;
+  guint i, n;
+
+  /* *INDENT-OFF* */
+  *pic_param = (VAPictureParameterBufferHEVCScc) {
+    .screen_content_pic_fields.bits = {
+      .pps_curr_pic_ref_enabled_flag = pps_scc->pps_curr_pic_ref_enabled_flag,
+      .palette_mode_enabled_flag = sps_scc->palette_mode_enabled_flag,
+      .motion_vector_resolution_control_idc = sps_scc->motion_vector_resolution_control_idc,
+      .intra_boundary_filtering_disabled_flag = sps_scc->intra_boundary_filtering_disabled_flag,
+      .residual_adaptive_colour_transform_enabled_flag = pps_scc->residual_adaptive_colour_transform_enabled_flag,
+      .pps_slice_act_qp_offsets_present_flag = pps_scc->pps_slice_act_qp_offsets_present_flag,
+    },
+    .palette_max_size = sps_scc->palette_max_size,
+    .delta_palette_max_predictor_size = sps_scc->delta_palette_max_predictor_size,
+    .pps_act_y_qp_offset_plus5 = pps_scc->pps_act_y_qp_offset_plus5,
+    .pps_act_cb_qp_offset_plus5 = pps_scc->pps_act_cb_qp_offset_plus5,
+    .pps_act_cr_qp_offset_plus3 = pps_scc->pps_act_cr_qp_offset_plus3,
+  };
+  /* *INDENT-ON* */
+
+  /* firstly use the pps, then sps */
+  num_comps = sps->chroma_format_idc ? 3 : 1;
+
+  if (pps_scc->pps_palette_predictor_initializers_present_flag) {
+    pic_param->predictor_palette_size =
+        pps_scc->pps_num_palette_predictor_initializer;
+    for (n = 0; n < num_comps; n++)
+      for (i = 0; i < pps_scc->pps_num_palette_predictor_initializer; i++)
+        pic_param->predictor_palette_entries[n][i] =
+            (uint16_t) pps_scc->pps_palette_predictor_initializer[n][i];
+  } else if (sps_scc->sps_palette_predictor_initializers_present_flag) {
+    pic_param->predictor_palette_size =
+        sps_scc->sps_num_palette_predictor_initializer_minus1 + 1;
+    for (n = 0; n < num_comps; n++)
+      for (i = 0;
+          i < sps_scc->sps_num_palette_predictor_initializer_minus1 + 1; i++)
+        pic_param->predictor_palette_entries[n][i] =
+            (uint16_t) sps_scc->sps_palette_predictor_initializer[n][i];
+  }
+}
+
 static gboolean
 gst_va_h265_dec_start_picture (GstH265Decoder * decoder,
     GstH265Picture * picture, GstH265Slice * slice, GstH265Dpb * dpb)
@@ -674,8 +736,12 @@ gst_va_h265_dec_start_picture (GstH265Decoder * decoder,
   };
   /* *INDENT-ON* */
 
-  if (_is_range_extension_profile (self->parent.profile))
+  if (_is_range_extension_profile (self->parent.profile)
+      || _is_screen_content_ext_profile (self->parent.profile)) {
     _fill_picture_range_ext_parameter (self, sps, pps);
+    if (_is_screen_content_ext_profile (self->parent.profile))
+      _fill_screen_content_ext_parameter (self, sps, pps);
+  }
 
   for (i = 0; i <= pps->num_tile_columns_minus1; i++)
     pic_param->base.column_width_minus1[i] = pps->column_width_minus1[i];
@@ -698,7 +764,8 @@ gst_va_h265_dec_start_picture (GstH265Decoder * decoder,
       _init_vaapi_pic (&pic_param->base.ReferenceFrames[i]);
   }
 
-  pic_param_size = _is_range_extension_profile (self->parent.profile) ?
+  pic_param_size = _is_range_extension_profile (self->parent.profile)
+      || _is_screen_content_ext_profile (self->parent.profile) ?
       sizeof (*pic_param) : sizeof (pic_param->base);
   if (!gst_va_decoder_add_param_buffer (base->decoder, va_pic,
           VAPictureParameterBufferType, pic_param, pic_param_size))