| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2019-2020 Pengutronix, Michael Tretter <kernel@pengutronix.de> |
| * |
| * Convert NAL units between raw byte sequence payloads (RBSP) and C structs. |
| * |
| * The conversion is defined in "ITU-T Rec. H.265 (02/2018) high efficiency |
| * video coding". Decoder drivers may use the parser to parse RBSP from |
| * encoded streams and configure the hardware, if the hardware is not able to |
| * parse RBSP itself. Encoder drivers may use the generator to generate the |
| * RBSP for VPS/SPS/PPS nal units and add them to the encoded stream if the |
| * hardware does not generate the units. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/v4l2-controls.h> |
| |
| #include <linux/device.h> |
| #include <linux/export.h> |
| #include <linux/log2.h> |
| |
| #include "nal-hevc.h" |
| #include "nal-rbsp.h" |
| |
| /* |
| * See Rec. ITU-T H.265 (02/2018) Table 7-1 - NAL unit type codes and NAL unit |
| * type classes |
| */ |
| enum nal_unit_type { |
| VPS_NUT = 32, |
| SPS_NUT = 33, |
| PPS_NUT = 34, |
| FD_NUT = 38, |
| }; |
| |
| static void nal_hevc_write_start_code_prefix(struct rbsp *rbsp) |
| { |
| u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); |
| int i = 4; |
| |
| if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) { |
| rbsp->error = -EINVAL; |
| return; |
| } |
| |
| p[0] = 0x00; |
| p[1] = 0x00; |
| p[2] = 0x00; |
| p[3] = 0x01; |
| |
| rbsp->pos += i * 8; |
| } |
| |
| static void nal_hevc_read_start_code_prefix(struct rbsp *rbsp) |
| { |
| u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); |
| int i = 4; |
| |
| if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) { |
| rbsp->error = -EINVAL; |
| return; |
| } |
| |
| if (p[0] != 0x00 || p[1] != 0x00 || p[2] != 0x00 || p[3] != 0x01) { |
| rbsp->error = -EINVAL; |
| return; |
| } |
| |
| rbsp->pos += i * 8; |
| } |
| |
| static void nal_hevc_write_filler_data(struct rbsp *rbsp) |
| { |
| u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); |
| int i; |
| |
| /* Keep 1 byte extra for terminating the NAL unit */ |
| i = rbsp->size - DIV_ROUND_UP(rbsp->pos, 8) - 1; |
| memset(p, 0xff, i); |
| rbsp->pos += i * 8; |
| } |
| |
| static void nal_hevc_read_filler_data(struct rbsp *rbsp) |
| { |
| u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); |
| |
| while (*p == 0xff) { |
| if (DIV_ROUND_UP(rbsp->pos, 8) > rbsp->size) { |
| rbsp->error = -EINVAL; |
| return; |
| } |
| |
| p++; |
| rbsp->pos += 8; |
| } |
| } |
| |
| static void nal_hevc_rbsp_profile_tier_level(struct rbsp *rbsp, |
| struct nal_hevc_profile_tier_level *ptl) |
| { |
| unsigned int i; |
| unsigned int max_num_sub_layers_minus_1 = 0; |
| |
| rbsp_bits(rbsp, 2, &ptl->general_profile_space); |
| rbsp_bit(rbsp, &ptl->general_tier_flag); |
| rbsp_bits(rbsp, 5, &ptl->general_profile_idc); |
| for (i = 0; i < 32; i++) |
| rbsp_bit(rbsp, &ptl->general_profile_compatibility_flag[i]); |
| rbsp_bit(rbsp, &ptl->general_progressive_source_flag); |
| rbsp_bit(rbsp, &ptl->general_interlaced_source_flag); |
| rbsp_bit(rbsp, &ptl->general_non_packed_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_frame_only_constraint_flag); |
| if (ptl->general_profile_idc == 4 || |
| ptl->general_profile_compatibility_flag[4] || |
| ptl->general_profile_idc == 5 || |
| ptl->general_profile_compatibility_flag[5] || |
| ptl->general_profile_idc == 6 || |
| ptl->general_profile_compatibility_flag[6] || |
| ptl->general_profile_idc == 7 || |
| ptl->general_profile_compatibility_flag[7] || |
| ptl->general_profile_idc == 8 || |
| ptl->general_profile_compatibility_flag[8] || |
| ptl->general_profile_idc == 9 || |
| ptl->general_profile_compatibility_flag[9] || |
| ptl->general_profile_idc == 10 || |
| ptl->general_profile_compatibility_flag[10]) { |
| rbsp_bit(rbsp, &ptl->general_max_12bit_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_max_10bit_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_max_8bit_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_max_422chroma_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_max_420chroma_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_max_monochrome_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_intra_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_one_picture_only_constraint_flag); |
| rbsp_bit(rbsp, &ptl->general_lower_bit_rate_constraint_flag); |
| if (ptl->general_profile_idc == 5 || |
| ptl->general_profile_compatibility_flag[5] || |
| ptl->general_profile_idc == 9 || |
| ptl->general_profile_compatibility_flag[9] || |
| ptl->general_profile_idc == 10 || |
| ptl->general_profile_compatibility_flag[10]) { |
| rbsp_bit(rbsp, &ptl->general_max_14bit_constraint_flag); |
| rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_33bits); |
| rbsp_bits(rbsp, 33 - 32, &ptl->general_reserved_zero_33bits); |
| } else { |
| rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_34bits); |
| rbsp_bits(rbsp, 34 - 2, &ptl->general_reserved_zero_34bits); |
| } |
| } else if (ptl->general_profile_idc == 2 || |
| ptl->general_profile_compatibility_flag[2]) { |
| rbsp_bits(rbsp, 7, &ptl->general_reserved_zero_7bits); |
| rbsp_bit(rbsp, &ptl->general_one_picture_only_constraint_flag); |
| rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_35bits); |
| rbsp_bits(rbsp, 35 - 32, &ptl->general_reserved_zero_35bits); |
| } else { |
| rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_43bits); |
| rbsp_bits(rbsp, 43 - 32, &ptl->general_reserved_zero_43bits); |
| } |
| if ((ptl->general_profile_idc >= 1 && ptl->general_profile_idc <= 5) || |
| ptl->general_profile_idc == 9 || |
| ptl->general_profile_compatibility_flag[1] || |
| ptl->general_profile_compatibility_flag[2] || |
| ptl->general_profile_compatibility_flag[3] || |
| ptl->general_profile_compatibility_flag[4] || |
| ptl->general_profile_compatibility_flag[5] || |
| ptl->general_profile_compatibility_flag[9]) |
| rbsp_bit(rbsp, &ptl->general_inbld_flag); |
| else |
| rbsp_bit(rbsp, &ptl->general_reserved_zero_bit); |
| rbsp_bits(rbsp, 8, &ptl->general_level_idc); |
| if (max_num_sub_layers_minus_1 > 0) |
| rbsp_unsupported(rbsp); |
| } |
| |
| static void nal_hevc_rbsp_vps(struct rbsp *rbsp, struct nal_hevc_vps *vps) |
| { |
| unsigned int i, j; |
| unsigned int reserved_0xffff_16bits = 0xffff; |
| |
| rbsp_bits(rbsp, 4, &vps->video_parameter_set_id); |
| rbsp_bit(rbsp, &vps->base_layer_internal_flag); |
| rbsp_bit(rbsp, &vps->base_layer_available_flag); |
| rbsp_bits(rbsp, 6, &vps->max_layers_minus1); |
| rbsp_bits(rbsp, 3, &vps->max_sub_layers_minus1); |
| rbsp_bits(rbsp, 1, &vps->temporal_id_nesting_flag); |
| rbsp_bits(rbsp, 16, &reserved_0xffff_16bits); |
| nal_hevc_rbsp_profile_tier_level(rbsp, &vps->profile_tier_level); |
| rbsp_bit(rbsp, &vps->sub_layer_ordering_info_present_flag); |
| for (i = vps->sub_layer_ordering_info_present_flag ? 0 : vps->max_sub_layers_minus1; |
| i <= vps->max_sub_layers_minus1; i++) { |
| rbsp_uev(rbsp, &vps->max_dec_pic_buffering_minus1[i]); |
| rbsp_uev(rbsp, &vps->max_num_reorder_pics[i]); |
| rbsp_uev(rbsp, &vps->max_latency_increase_plus1[i]); |
| } |
| rbsp_bits(rbsp, 6, &vps->max_layer_id); |
| rbsp_uev(rbsp, &vps->num_layer_sets_minus1); |
| for (i = 0; i <= vps->num_layer_sets_minus1; i++) |
| for (j = 0; j <= vps->max_layer_id; j++) |
| rbsp_bit(rbsp, &vps->layer_id_included_flag[i][j]); |
| rbsp_bit(rbsp, &vps->timing_info_present_flag); |
| if (vps->timing_info_present_flag) |
| rbsp_unsupported(rbsp); |
| rbsp_bit(rbsp, &vps->extension_flag); |
| if (vps->extension_flag) |
| 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_bits(rbsp, 4, &sps->video_parameter_set_id); |
| rbsp_bits(rbsp, 3, &sps->max_sub_layers_minus1); |
| rbsp_bit(rbsp, &sps->temporal_id_nesting_flag); |
| nal_hevc_rbsp_profile_tier_level(rbsp, &sps->profile_tier_level); |
| rbsp_uev(rbsp, &sps->seq_parameter_set_id); |
| |
| rbsp_uev(rbsp, &sps->chroma_format_idc); |
| if (sps->chroma_format_idc == 3) |
| rbsp_bit(rbsp, &sps->separate_colour_plane_flag); |
| rbsp_uev(rbsp, &sps->pic_width_in_luma_samples); |
| rbsp_uev(rbsp, &sps->pic_height_in_luma_samples); |
| rbsp_bit(rbsp, &sps->conformance_window_flag); |
| if (sps->conformance_window_flag) { |
| rbsp_uev(rbsp, &sps->conf_win_left_offset); |
| rbsp_uev(rbsp, &sps->conf_win_right_offset); |
| rbsp_uev(rbsp, &sps->conf_win_top_offset); |
| rbsp_uev(rbsp, &sps->conf_win_bottom_offset); |
| } |
| rbsp_uev(rbsp, &sps->bit_depth_luma_minus8); |
| rbsp_uev(rbsp, &sps->bit_depth_chroma_minus8); |
| |
| rbsp_uev(rbsp, &sps->log2_max_pic_order_cnt_lsb_minus4); |
| |
| rbsp_bit(rbsp, &sps->sub_layer_ordering_info_present_flag); |
| for (i = (sps->sub_layer_ordering_info_present_flag ? 0 : sps->max_sub_layers_minus1); |
| i <= sps->max_sub_layers_minus1; i++) { |
| rbsp_uev(rbsp, &sps->max_dec_pic_buffering_minus1[i]); |
| rbsp_uev(rbsp, &sps->max_num_reorder_pics[i]); |
| rbsp_uev(rbsp, &sps->max_latency_increase_plus1[i]); |
| } |
| rbsp_uev(rbsp, &sps->log2_min_luma_coding_block_size_minus3); |
| rbsp_uev(rbsp, &sps->log2_diff_max_min_luma_coding_block_size); |
| rbsp_uev(rbsp, &sps->log2_min_luma_transform_block_size_minus2); |
| rbsp_uev(rbsp, &sps->log2_diff_max_min_luma_transform_block_size); |
| rbsp_uev(rbsp, &sps->max_transform_hierarchy_depth_inter); |
| rbsp_uev(rbsp, &sps->max_transform_hierarchy_depth_intra); |
| |
| rbsp_bit(rbsp, &sps->scaling_list_enabled_flag); |
| if (sps->scaling_list_enabled_flag) |
| rbsp_unsupported(rbsp); |
| |
| rbsp_bit(rbsp, &sps->amp_enabled_flag); |
| rbsp_bit(rbsp, &sps->sample_adaptive_offset_enabled_flag); |
| rbsp_bit(rbsp, &sps->pcm_enabled_flag); |
| if (sps->pcm_enabled_flag) { |
| rbsp_bits(rbsp, 4, &sps->pcm_sample_bit_depth_luma_minus1); |
| rbsp_bits(rbsp, 4, &sps->pcm_sample_bit_depth_chroma_minus1); |
| rbsp_uev(rbsp, &sps->log2_min_pcm_luma_coding_block_size_minus3); |
| rbsp_uev(rbsp, &sps->log2_diff_max_min_pcm_luma_coding_block_size); |
| rbsp_bit(rbsp, &sps->pcm_loop_filter_disabled_flag); |
| } |
| |
| rbsp_uev(rbsp, &sps->num_short_term_ref_pic_sets); |
| if (sps->num_short_term_ref_pic_sets > 0) |
| rbsp_unsupported(rbsp); |
| |
| rbsp_bit(rbsp, &sps->long_term_ref_pics_present_flag); |
| if (sps->long_term_ref_pics_present_flag) |
| rbsp_unsupported(rbsp); |
| |
| rbsp_bit(rbsp, &sps->sps_temporal_mvp_enabled_flag); |
| rbsp_bit(rbsp, &sps->strong_intra_smoothing_enabled_flag); |
| rbsp_bit(rbsp, &sps->vui_parameters_present_flag); |
| if (sps->vui_parameters_present_flag) |
| nal_hevc_rbsp_vui_parameters(rbsp, &sps->vui); |
| |
| rbsp_bit(rbsp, &sps->extension_present_flag); |
| if (sps->extension_present_flag) { |
| rbsp_bit(rbsp, &sps->sps_range_extension_flag); |
| rbsp_bit(rbsp, &sps->sps_multilayer_extension_flag); |
| rbsp_bit(rbsp, &sps->sps_3d_extension_flag); |
| rbsp_bit(rbsp, &sps->sps_scc_extension_flag); |
| rbsp_bits(rbsp, 5, &sps->sps_extension_4bits); |
| } |
| if (sps->sps_range_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (sps->sps_multilayer_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (sps->sps_3d_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (sps->sps_scc_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (sps->sps_extension_4bits) |
| rbsp_unsupported(rbsp); |
| } |
| |
| static void nal_hevc_rbsp_pps(struct rbsp *rbsp, struct nal_hevc_pps *pps) |
| { |
| unsigned int i; |
| |
| rbsp_uev(rbsp, &pps->pps_pic_parameter_set_id); |
| rbsp_uev(rbsp, &pps->pps_seq_parameter_set_id); |
| rbsp_bit(rbsp, &pps->dependent_slice_segments_enabled_flag); |
| rbsp_bit(rbsp, &pps->output_flag_present_flag); |
| rbsp_bits(rbsp, 3, &pps->num_extra_slice_header_bits); |
| rbsp_bit(rbsp, &pps->sign_data_hiding_enabled_flag); |
| rbsp_bit(rbsp, &pps->cabac_init_present_flag); |
| rbsp_uev(rbsp, &pps->num_ref_idx_l0_default_active_minus1); |
| rbsp_uev(rbsp, &pps->num_ref_idx_l1_default_active_minus1); |
| rbsp_sev(rbsp, &pps->init_qp_minus26); |
| rbsp_bit(rbsp, &pps->constrained_intra_pred_flag); |
| rbsp_bit(rbsp, &pps->transform_skip_enabled_flag); |
| rbsp_bit(rbsp, &pps->cu_qp_delta_enabled_flag); |
| if (pps->cu_qp_delta_enabled_flag) |
| rbsp_uev(rbsp, &pps->diff_cu_qp_delta_depth); |
| rbsp_sev(rbsp, &pps->pps_cb_qp_offset); |
| rbsp_sev(rbsp, &pps->pps_cr_qp_offset); |
| rbsp_bit(rbsp, &pps->pps_slice_chroma_qp_offsets_present_flag); |
| rbsp_bit(rbsp, &pps->weighted_pred_flag); |
| rbsp_bit(rbsp, &pps->weighted_bipred_flag); |
| rbsp_bit(rbsp, &pps->transquant_bypass_enabled_flag); |
| rbsp_bit(rbsp, &pps->tiles_enabled_flag); |
| rbsp_bit(rbsp, &pps->entropy_coding_sync_enabled_flag); |
| if (pps->tiles_enabled_flag) { |
| rbsp_uev(rbsp, &pps->num_tile_columns_minus1); |
| rbsp_uev(rbsp, &pps->num_tile_rows_minus1); |
| rbsp_bit(rbsp, &pps->uniform_spacing_flag); |
| if (!pps->uniform_spacing_flag) { |
| for (i = 0; i < pps->num_tile_columns_minus1; i++) |
| rbsp_uev(rbsp, &pps->column_width_minus1[i]); |
| for (i = 0; i < pps->num_tile_rows_minus1; i++) |
| rbsp_uev(rbsp, &pps->row_height_minus1[i]); |
| } |
| rbsp_bit(rbsp, &pps->loop_filter_across_tiles_enabled_flag); |
| } |
| rbsp_bit(rbsp, &pps->pps_loop_filter_across_slices_enabled_flag); |
| rbsp_bit(rbsp, &pps->deblocking_filter_control_present_flag); |
| if (pps->deblocking_filter_control_present_flag) { |
| rbsp_bit(rbsp, &pps->deblocking_filter_override_enabled_flag); |
| rbsp_bit(rbsp, &pps->pps_deblocking_filter_disabled_flag); |
| if (!pps->pps_deblocking_filter_disabled_flag) { |
| rbsp_sev(rbsp, &pps->pps_beta_offset_div2); |
| rbsp_sev(rbsp, &pps->pps_tc_offset_div2); |
| } |
| } |
| rbsp_bit(rbsp, &pps->pps_scaling_list_data_present_flag); |
| if (pps->pps_scaling_list_data_present_flag) |
| rbsp_unsupported(rbsp); |
| rbsp_bit(rbsp, &pps->lists_modification_present_flag); |
| rbsp_uev(rbsp, &pps->log2_parallel_merge_level_minus2); |
| rbsp_bit(rbsp, &pps->slice_segment_header_extension_present_flag); |
| rbsp_bit(rbsp, &pps->pps_extension_present_flag); |
| if (pps->pps_extension_present_flag) { |
| rbsp_bit(rbsp, &pps->pps_range_extension_flag); |
| rbsp_bit(rbsp, &pps->pps_multilayer_extension_flag); |
| rbsp_bit(rbsp, &pps->pps_3d_extension_flag); |
| rbsp_bit(rbsp, &pps->pps_scc_extension_flag); |
| rbsp_bits(rbsp, 4, &pps->pps_extension_4bits); |
| } |
| if (pps->pps_range_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (pps->pps_multilayer_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (pps->pps_3d_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (pps->pps_scc_extension_flag) |
| rbsp_unsupported(rbsp); |
| if (pps->pps_extension_4bits) |
| rbsp_unsupported(rbsp); |
| } |
| |
| /** |
| * nal_hevc_write_vps() - Write PPS NAL unit into RBSP format |
| * @dev: device pointer |
| * @dest: the buffer that is filled with RBSP data |
| * @n: maximum size of @dest in bytes |
| * @vps: &struct nal_hevc_vps to convert to RBSP |
| * |
| * Convert @vps to RBSP data and write it into @dest. |
| * |
| * The size of the VPS NAL unit is not known in advance and this function will |
| * fail, if @dest does not hold sufficient space for the VPS NAL unit. |
| * |
| * Return: number of bytes written to @dest or negative error code |
| */ |
| ssize_t nal_hevc_write_vps(const struct device *dev, |
| void *dest, size_t n, struct nal_hevc_vps *vps) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit = 0; |
| unsigned int nal_unit_type = VPS_NUT; |
| unsigned int nuh_layer_id = 0; |
| unsigned int nuh_temporal_id_plus1 = 1; |
| |
| if (!dest) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, dest, n, &write); |
| |
| nal_hevc_write_start_code_prefix(&rbsp); |
| |
| /* NAL unit header */ |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| nal_hevc_rbsp_vps(&rbsp, vps); |
| |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_write_vps); |
| |
| /** |
| * nal_hevc_read_vps() - Read VPS NAL unit from RBSP format |
| * @dev: device pointer |
| * @vps: the &struct nal_hevc_vps to fill from the RBSP data |
| * @src: the buffer that contains the RBSP data |
| * @n: size of @src in bytes |
| * |
| * Read RBSP data from @src and use it to fill @vps. |
| * |
| * Return: number of bytes read from @src or negative error code |
| */ |
| ssize_t nal_hevc_read_vps(const struct device *dev, |
| struct nal_hevc_vps *vps, void *src, size_t n) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit; |
| unsigned int nal_unit_type; |
| unsigned int nuh_layer_id; |
| unsigned int nuh_temporal_id_plus1; |
| |
| if (!src) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, src, n, &read); |
| |
| nal_hevc_read_start_code_prefix(&rbsp); |
| |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| if (rbsp.error || |
| forbidden_zero_bit != 0 || |
| nal_unit_type != VPS_NUT) |
| return -EINVAL; |
| |
| nal_hevc_rbsp_vps(&rbsp, vps); |
| |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_read_vps); |
| |
| /** |
| * nal_hevc_write_sps() - Write SPS NAL unit into RBSP format |
| * @dev: device pointer |
| * @dest: the buffer that is filled with RBSP data |
| * @n: maximum size of @dest in bytes |
| * @sps: &struct nal_hevc_sps to convert to RBSP |
| * |
| * Convert @sps to RBSP data and write it into @dest. |
| * |
| * The size of the SPS NAL unit is not known in advance and this function will |
| * fail, if @dest does not hold sufficient space for the SPS NAL unit. |
| * |
| * Return: number of bytes written to @dest or negative error code |
| */ |
| ssize_t nal_hevc_write_sps(const struct device *dev, |
| void *dest, size_t n, struct nal_hevc_sps *sps) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit = 0; |
| unsigned int nal_unit_type = SPS_NUT; |
| unsigned int nuh_layer_id = 0; |
| unsigned int nuh_temporal_id_plus1 = 1; |
| |
| if (!dest) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, dest, n, &write); |
| |
| nal_hevc_write_start_code_prefix(&rbsp); |
| |
| /* NAL unit header */ |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| nal_hevc_rbsp_sps(&rbsp, sps); |
| |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_write_sps); |
| |
| /** |
| * nal_hevc_read_sps() - Read SPS NAL unit from RBSP format |
| * @dev: device pointer |
| * @sps: the &struct nal_hevc_sps to fill from the RBSP data |
| * @src: the buffer that contains the RBSP data |
| * @n: size of @src in bytes |
| * |
| * Read RBSP data from @src and use it to fill @sps. |
| * |
| * Return: number of bytes read from @src or negative error code |
| */ |
| ssize_t nal_hevc_read_sps(const struct device *dev, |
| struct nal_hevc_sps *sps, void *src, size_t n) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit; |
| unsigned int nal_unit_type; |
| unsigned int nuh_layer_id; |
| unsigned int nuh_temporal_id_plus1; |
| |
| if (!src) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, src, n, &read); |
| |
| nal_hevc_read_start_code_prefix(&rbsp); |
| |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| if (rbsp.error || |
| forbidden_zero_bit != 0 || |
| nal_unit_type != SPS_NUT) |
| return -EINVAL; |
| |
| nal_hevc_rbsp_sps(&rbsp, sps); |
| |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_read_sps); |
| |
| /** |
| * nal_hevc_write_pps() - Write PPS NAL unit into RBSP format |
| * @dev: device pointer |
| * @dest: the buffer that is filled with RBSP data |
| * @n: maximum size of @dest in bytes |
| * @pps: &struct nal_hevc_pps to convert to RBSP |
| * |
| * Convert @pps to RBSP data and write it into @dest. |
| * |
| * The size of the PPS NAL unit is not known in advance and this function will |
| * fail, if @dest does not hold sufficient space for the PPS NAL unit. |
| * |
| * Return: number of bytes written to @dest or negative error code |
| */ |
| ssize_t nal_hevc_write_pps(const struct device *dev, |
| void *dest, size_t n, struct nal_hevc_pps *pps) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit = 0; |
| unsigned int nal_unit_type = PPS_NUT; |
| unsigned int nuh_layer_id = 0; |
| unsigned int nuh_temporal_id_plus1 = 1; |
| |
| if (!dest) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, dest, n, &write); |
| |
| nal_hevc_write_start_code_prefix(&rbsp); |
| |
| /* NAL unit header */ |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| nal_hevc_rbsp_pps(&rbsp, pps); |
| |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_write_pps); |
| |
| /** |
| * nal_hevc_read_pps() - Read PPS NAL unit from RBSP format |
| * @dev: device pointer |
| * @pps: the &struct nal_hevc_pps to fill from the RBSP data |
| * @src: the buffer that contains the RBSP data |
| * @n: size of @src in bytes |
| * |
| * Read RBSP data from @src and use it to fill @pps. |
| * |
| * Return: number of bytes read from @src or negative error code |
| */ |
| ssize_t nal_hevc_read_pps(const struct device *dev, |
| struct nal_hevc_pps *pps, void *src, size_t n) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit; |
| unsigned int nal_unit_type; |
| unsigned int nuh_layer_id; |
| unsigned int nuh_temporal_id_plus1; |
| |
| if (!src) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, src, n, &read); |
| |
| nal_hevc_read_start_code_prefix(&rbsp); |
| |
| /* NAL unit header */ |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| nal_hevc_rbsp_pps(&rbsp, pps); |
| |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_read_pps); |
| |
| /** |
| * nal_hevc_write_filler() - Write filler data RBSP |
| * @dev: device pointer |
| * @dest: buffer to fill with filler data |
| * @n: size of the buffer to fill with filler data |
| * |
| * Write a filler data RBSP to @dest with a size of @n bytes and return the |
| * number of written filler data bytes. |
| * |
| * Use this function to generate dummy data in an RBSP data stream that can be |
| * safely ignored by hevc decoders. |
| * |
| * The RBSP format of the filler data is specified in Rec. ITU-T H.265 |
| * (02/2018) 7.3.2.8 Filler data RBSP syntax. |
| * |
| * Return: number of filler data bytes (including marker) or negative error |
| */ |
| ssize_t nal_hevc_write_filler(const struct device *dev, void *dest, size_t n) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit = 0; |
| unsigned int nal_unit_type = FD_NUT; |
| unsigned int nuh_layer_id = 0; |
| unsigned int nuh_temporal_id_plus1 = 1; |
| |
| if (!dest) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, dest, n, &write); |
| |
| nal_hevc_write_start_code_prefix(&rbsp); |
| |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| nal_hevc_write_filler_data(&rbsp); |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_write_filler); |
| |
| /** |
| * nal_hevc_read_filler() - Read filler data RBSP |
| * @dev: device pointer |
| * @src: buffer with RBSP data that is read |
| * @n: maximum size of src that shall be read |
| * |
| * Read a filler data RBSP from @src up to a maximum size of @n bytes and |
| * return the size of the filler data in bytes including the marker. |
| * |
| * This function is used to parse filler data and skip the respective bytes in |
| * the RBSP data. |
| * |
| * The RBSP format of the filler data is specified in Rec. ITU-T H.265 |
| * (02/2018) 7.3.2.8 Filler data RBSP syntax. |
| * |
| * Return: number of filler data bytes (including marker) or negative error |
| */ |
| ssize_t nal_hevc_read_filler(const struct device *dev, void *src, size_t n) |
| { |
| struct rbsp rbsp; |
| unsigned int forbidden_zero_bit; |
| unsigned int nal_unit_type; |
| unsigned int nuh_layer_id; |
| unsigned int nuh_temporal_id_plus1; |
| |
| if (!src) |
| return -EINVAL; |
| |
| rbsp_init(&rbsp, src, n, &read); |
| |
| nal_hevc_read_start_code_prefix(&rbsp); |
| |
| rbsp_bit(&rbsp, &forbidden_zero_bit); |
| rbsp_bits(&rbsp, 6, &nal_unit_type); |
| rbsp_bits(&rbsp, 6, &nuh_layer_id); |
| rbsp_bits(&rbsp, 3, &nuh_temporal_id_plus1); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| if (forbidden_zero_bit != 0 || |
| nal_unit_type != FD_NUT) |
| return -EINVAL; |
| |
| nal_hevc_read_filler_data(&rbsp); |
| rbsp_trailing_bits(&rbsp); |
| |
| if (rbsp.error) |
| return rbsp.error; |
| |
| return DIV_ROUND_UP(rbsp.pos, 8); |
| } |
| EXPORT_SYMBOL_GPL(nal_hevc_read_filler); |
