media: allegro: nal-hevc: implement generator for vui

The NAL unit generator for HEVC does not support the generation of vui
parameters. Implement it to allow drivers to set the vui parameters in
the coded video stream.

Signed-off-by: Michael Tretter <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/allegro-dvt/nal-hevc.c

···
 		rbsp_unsupported(rbsp);
 }
 
+static void nal_hevc_rbsp_sub_layer_hrd_parameters(struct rbsp *rbsp,
+						   struct nal_hevc_sub_layer_hrd_parameters *hrd)
+{
+	unsigned int i;
+	unsigned int cpb_cnt = 1;
+
+	for (i = 0; i < cpb_cnt; i++) {
+		rbsp_uev(rbsp, &hrd->bit_rate_value_minus1[i]);
+		rbsp_uev(rbsp, &hrd->cpb_size_value_minus1[i]);
+		rbsp_bit(rbsp, &hrd->cbr_flag[i]);
+	}
+}
+
+static void nal_hevc_rbsp_hrd_parameters(struct rbsp *rbsp,
+					 struct nal_hevc_hrd_parameters *hrd)
+{
+	unsigned int i;
+	unsigned int max_num_sub_layers_minus_1 = 0;
+
+	rbsp_bit(rbsp, &hrd->nal_hrd_parameters_present_flag);
+	rbsp_bit(rbsp, &hrd->vcl_hrd_parameters_present_flag);
+	if (hrd->nal_hrd_parameters_present_flag || hrd->vcl_hrd_parameters_present_flag) {
+		rbsp_bit(rbsp, &hrd->sub_pic_hrd_params_present_flag);
+		if (hrd->sub_pic_hrd_params_present_flag) {
+			rbsp_bits(rbsp, 8, &hrd->tick_divisor_minus2);
+			rbsp_bits(rbsp, 5, &hrd->du_cpb_removal_delay_increment_length_minus1);
+			rbsp_bit(rbsp, &hrd->sub_pic_cpb_params_in_pic_timing_sei_flag);
+			rbsp_bits(rbsp, 5, &hrd->dpb_output_delay_du_length_minus1);
+		}
+		rbsp_bits(rbsp, 4, &hrd->bit_rate_scale);
+		rbsp_bits(rbsp, 4, &hrd->cpb_size_scale);
+		if (hrd->sub_pic_hrd_params_present_flag)
+			rbsp_bits(rbsp, 4, &hrd->cpb_size_du_scale);
+		rbsp_bits(rbsp, 5, &hrd->initial_cpb_removal_delay_length_minus1);
+		rbsp_bits(rbsp, 5, &hrd->au_cpb_removal_delay_length_minus1);
+		rbsp_bits(rbsp, 5, &hrd->dpb_output_delay_length_minus1);
+	}
+	for (i = 0; i <= max_num_sub_layers_minus_1; i++) {
+		rbsp_bit(rbsp, &hrd->fixed_pic_rate_general_flag[i]);
+		if (!hrd->fixed_pic_rate_general_flag[i])
+			rbsp_bit(rbsp, &hrd->fixed_pic_rate_within_cvs_flag[i]);
+		if (hrd->fixed_pic_rate_within_cvs_flag[i])
+			rbsp_uev(rbsp, &hrd->elemental_duration_in_tc_minus1[i]);
+		else
+			rbsp_bit(rbsp, &hrd->low_delay_hrd_flag[i]);
+		if (!hrd->low_delay_hrd_flag[i])
+			rbsp_uev(rbsp, &hrd->cpb_cnt_minus1[i]);
+		if (hrd->nal_hrd_parameters_present_flag)
+			nal_hevc_rbsp_sub_layer_hrd_parameters(rbsp, &hrd->vcl_hrd[i]);
+		if (hrd->vcl_hrd_parameters_present_flag)
+			nal_hevc_rbsp_sub_layer_hrd_parameters(rbsp, &hrd->vcl_hrd[i]);
+	}
+}
+
+static void nal_hevc_rbsp_vui_parameters(struct rbsp *rbsp,
+					 struct nal_hevc_vui_parameters *vui)
+{
+	if (!vui) {
+		rbsp->error = -EINVAL;
+		return;
+	}
+
+	rbsp_bit(rbsp, &vui->aspect_ratio_info_present_flag);
+	if (vui->aspect_ratio_info_present_flag) {
+		rbsp_bits(rbsp, 8, &vui->aspect_ratio_idc);
+		if (vui->aspect_ratio_idc == 255) {
+			rbsp_bits(rbsp, 16, &vui->sar_width);
+			rbsp_bits(rbsp, 16, &vui->sar_height);
+		}
+	}
+
+	rbsp_bit(rbsp, &vui->overscan_info_present_flag);
+	if (vui->overscan_info_present_flag)
+		rbsp_bit(rbsp, &vui->overscan_appropriate_flag);
+
+	rbsp_bit(rbsp, &vui->video_signal_type_present_flag);
+	if (vui->video_signal_type_present_flag) {
+		rbsp_bits(rbsp, 3, &vui->video_format);
+		rbsp_bit(rbsp, &vui->video_full_range_flag);
+
+		rbsp_bit(rbsp, &vui->colour_description_present_flag);
+		if (vui->colour_description_present_flag) {
+			rbsp_bits(rbsp, 8, &vui->colour_primaries);
+			rbsp_bits(rbsp, 8, &vui->transfer_characteristics);
+			rbsp_bits(rbsp, 8, &vui->matrix_coeffs);
+		}
+	}
+
+	rbsp_bit(rbsp, &vui->chroma_loc_info_present_flag);
+	if (vui->chroma_loc_info_present_flag) {
+		rbsp_uev(rbsp, &vui->chroma_sample_loc_type_top_field);
+		rbsp_uev(rbsp, &vui->chroma_sample_loc_type_bottom_field);
+	}
+
+	rbsp_bit(rbsp, &vui->neutral_chroma_indication_flag);
+	rbsp_bit(rbsp, &vui->field_seq_flag);
+	rbsp_bit(rbsp, &vui->frame_field_info_present_flag);
+	rbsp_bit(rbsp, &vui->default_display_window_flag);
+	if (vui->default_display_window_flag) {
+		rbsp_uev(rbsp, &vui->def_disp_win_left_offset);
+		rbsp_uev(rbsp, &vui->def_disp_win_right_offset);
+		rbsp_uev(rbsp, &vui->def_disp_win_top_offset);
+		rbsp_uev(rbsp, &vui->def_disp_win_bottom_offset);
+	}
+
+	rbsp_bit(rbsp, &vui->vui_timing_info_present_flag);
+	if (vui->vui_timing_info_present_flag) {
+		rbsp_bits(rbsp, 32, &vui->vui_num_units_in_tick);
+		rbsp_bits(rbsp, 32, &vui->vui_time_scale);
+		rbsp_bit(rbsp, &vui->vui_poc_proportional_to_timing_flag);
+		if (vui->vui_poc_proportional_to_timing_flag)
+			rbsp_uev(rbsp, &vui->vui_num_ticks_poc_diff_one_minus1);
+		rbsp_bit(rbsp, &vui->vui_hrd_parameters_present_flag);
+		if (vui->vui_hrd_parameters_present_flag)
+			nal_hevc_rbsp_hrd_parameters(rbsp, &vui->nal_hrd_parameters);
+	}
+
+	rbsp_bit(rbsp, &vui->bitstream_restriction_flag);
+	if (vui->bitstream_restriction_flag) {
+		rbsp_bit(rbsp, &vui->tiles_fixed_structure_flag);
+		rbsp_bit(rbsp, &vui->motion_vectors_over_pic_boundaries_flag);
+		rbsp_bit(rbsp, &vui->restricted_ref_pic_lists_flag);
+		rbsp_uev(rbsp, &vui->min_spatial_segmentation_idc);
+		rbsp_uev(rbsp, &vui->max_bytes_per_pic_denom);
+		rbsp_uev(rbsp, &vui->max_bits_per_min_cu_denom);
+		rbsp_uev(rbsp, &vui->log2_max_mv_length_horizontal);
+		rbsp_uev(rbsp, &vui->log2_max_mv_length_vertical);
+	}
+}
+
 static void nal_hevc_rbsp_sps(struct rbsp *rbsp, struct nal_hevc_sps *sps)
 {
 	unsigned int i;
···
 	rbsp_bit(rbsp, &sps->strong_intra_smoothing_enabled_flag);
 	rbsp_bit(rbsp, &sps->vui_parameters_present_flag);
 	if (sps->vui_parameters_present_flag)
-		rbsp_unsupported(rbsp);
+		nal_hevc_rbsp_vui_parameters(rbsp, &sps->vui);
 
 	rbsp_bit(rbsp, &sps->extension_present_flag);
 	if (sps->extension_present_flag) {