885 lines
28 KiB
C
885 lines
28 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019-2020 Pengutronix, Michael Tretter <kernel@pengutronix.de>
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*
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* Convert NAL units between raw byte sequence payloads (RBSP) and C structs.
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*
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* The conversion is defined in "ITU-T Rec. H.265 (02/2018) high efficiency
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* video coding". Decoder drivers may use the parser to parse RBSP from
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* encoded streams and configure the hardware, if the hardware is not able to
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* parse RBSP itself. Encoder drivers may use the generator to generate the
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* RBSP for VPS/SPS/PPS nal units and add them to the encoded stream if the
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* hardware does not generate the units.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/v4l2-controls.h>
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/log2.h>
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#include "nal-hevc.h"
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#include "nal-rbsp.h"
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/*
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* See Rec. ITU-T H.265 (02/2018) Table 7-1 - NAL unit type codes and NAL unit
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* type classes
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*/
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enum nal_unit_type {
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VPS_NUT = 32,
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SPS_NUT = 33,
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PPS_NUT = 34,
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FD_NUT = 38,
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};
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static void nal_hevc_write_start_code_prefix(struct rbsp *rbsp)
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{
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u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
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int i = 4;
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if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) {
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rbsp->error = -EINVAL;
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return;
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}
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p[0] = 0x00;
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p[1] = 0x00;
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p[2] = 0x00;
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p[3] = 0x01;
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rbsp->pos += i * 8;
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}
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static void nal_hevc_read_start_code_prefix(struct rbsp *rbsp)
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{
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u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
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int i = 4;
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if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) {
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rbsp->error = -EINVAL;
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return;
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}
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if (p[0] != 0x00 || p[1] != 0x00 || p[2] != 0x00 || p[3] != 0x01) {
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rbsp->error = -EINVAL;
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return;
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}
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rbsp->pos += i * 8;
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}
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static void nal_hevc_write_filler_data(struct rbsp *rbsp)
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{
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u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
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int i;
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/* Keep 1 byte extra for terminating the NAL unit */
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i = rbsp->size - DIV_ROUND_UP(rbsp->pos, 8) - 1;
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memset(p, 0xff, i);
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rbsp->pos += i * 8;
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}
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static void nal_hevc_read_filler_data(struct rbsp *rbsp)
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{
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u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
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while (*p == 0xff) {
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if (DIV_ROUND_UP(rbsp->pos, 8) > rbsp->size) {
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rbsp->error = -EINVAL;
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return;
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}
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p++;
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rbsp->pos += 8;
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}
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}
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static void nal_hevc_rbsp_profile_tier_level(struct rbsp *rbsp,
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struct nal_hevc_profile_tier_level *ptl)
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{
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unsigned int i;
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unsigned int max_num_sub_layers_minus_1 = 0;
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rbsp_bits(rbsp, 2, &ptl->general_profile_space);
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rbsp_bit(rbsp, &ptl->general_tier_flag);
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rbsp_bits(rbsp, 5, &ptl->general_profile_idc);
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for (i = 0; i < 32; i++)
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rbsp_bit(rbsp, &ptl->general_profile_compatibility_flag[i]);
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rbsp_bit(rbsp, &ptl->general_progressive_source_flag);
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rbsp_bit(rbsp, &ptl->general_interlaced_source_flag);
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rbsp_bit(rbsp, &ptl->general_non_packed_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_frame_only_constraint_flag);
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if (ptl->general_profile_idc == 4 ||
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ptl->general_profile_compatibility_flag[4] ||
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ptl->general_profile_idc == 5 ||
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ptl->general_profile_compatibility_flag[5] ||
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ptl->general_profile_idc == 6 ||
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ptl->general_profile_compatibility_flag[6] ||
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ptl->general_profile_idc == 7 ||
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ptl->general_profile_compatibility_flag[7] ||
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ptl->general_profile_idc == 8 ||
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ptl->general_profile_compatibility_flag[8] ||
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ptl->general_profile_idc == 9 ||
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ptl->general_profile_compatibility_flag[9] ||
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ptl->general_profile_idc == 10 ||
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ptl->general_profile_compatibility_flag[10]) {
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rbsp_bit(rbsp, &ptl->general_max_12bit_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_max_10bit_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_max_8bit_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_max_422chroma_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_max_420chroma_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_max_monochrome_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_intra_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_one_picture_only_constraint_flag);
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rbsp_bit(rbsp, &ptl->general_lower_bit_rate_constraint_flag);
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if (ptl->general_profile_idc == 5 ||
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ptl->general_profile_compatibility_flag[5] ||
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ptl->general_profile_idc == 9 ||
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ptl->general_profile_compatibility_flag[9] ||
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ptl->general_profile_idc == 10 ||
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ptl->general_profile_compatibility_flag[10]) {
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rbsp_bit(rbsp, &ptl->general_max_14bit_constraint_flag);
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rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_33bits);
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rbsp_bits(rbsp, 33 - 32, &ptl->general_reserved_zero_33bits);
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} else {
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rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_34bits);
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rbsp_bits(rbsp, 34 - 2, &ptl->general_reserved_zero_34bits);
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}
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} else if (ptl->general_profile_idc == 2 ||
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ptl->general_profile_compatibility_flag[2]) {
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rbsp_bits(rbsp, 7, &ptl->general_reserved_zero_7bits);
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rbsp_bit(rbsp, &ptl->general_one_picture_only_constraint_flag);
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rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_35bits);
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rbsp_bits(rbsp, 35 - 32, &ptl->general_reserved_zero_35bits);
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} else {
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rbsp_bits(rbsp, 32, &ptl->general_reserved_zero_43bits);
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rbsp_bits(rbsp, 43 - 32, &ptl->general_reserved_zero_43bits);
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}
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if ((ptl->general_profile_idc >= 1 && ptl->general_profile_idc <= 5) ||
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ptl->general_profile_idc == 9 ||
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ptl->general_profile_compatibility_flag[1] ||
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ptl->general_profile_compatibility_flag[2] ||
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ptl->general_profile_compatibility_flag[3] ||
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ptl->general_profile_compatibility_flag[4] ||
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ptl->general_profile_compatibility_flag[5] ||
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ptl->general_profile_compatibility_flag[9])
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rbsp_bit(rbsp, &ptl->general_inbld_flag);
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else
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rbsp_bit(rbsp, &ptl->general_reserved_zero_bit);
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rbsp_bits(rbsp, 8, &ptl->general_level_idc);
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if (max_num_sub_layers_minus_1 > 0)
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rbsp_unsupported(rbsp);
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}
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static void nal_hevc_rbsp_vps(struct rbsp *rbsp, struct nal_hevc_vps *vps)
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{
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unsigned int i, j;
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unsigned int reserved_0xffff_16bits = 0xffff;
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rbsp_bits(rbsp, 4, &vps->video_parameter_set_id);
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rbsp_bit(rbsp, &vps->base_layer_internal_flag);
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rbsp_bit(rbsp, &vps->base_layer_available_flag);
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rbsp_bits(rbsp, 6, &vps->max_layers_minus1);
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rbsp_bits(rbsp, 3, &vps->max_sub_layers_minus1);
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rbsp_bits(rbsp, 1, &vps->temporal_id_nesting_flag);
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rbsp_bits(rbsp, 16, &reserved_0xffff_16bits);
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nal_hevc_rbsp_profile_tier_level(rbsp, &vps->profile_tier_level);
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rbsp_bit(rbsp, &vps->sub_layer_ordering_info_present_flag);
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for (i = vps->sub_layer_ordering_info_present_flag ? 0 : vps->max_sub_layers_minus1;
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i <= vps->max_sub_layers_minus1; i++) {
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rbsp_uev(rbsp, &vps->max_dec_pic_buffering_minus1[i]);
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rbsp_uev(rbsp, &vps->max_num_reorder_pics[i]);
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rbsp_uev(rbsp, &vps->max_latency_increase_plus1[i]);
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}
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rbsp_bits(rbsp, 6, &vps->max_layer_id);
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rbsp_uev(rbsp, &vps->num_layer_sets_minus1);
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for (i = 0; i <= vps->num_layer_sets_minus1; i++)
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for (j = 0; j <= vps->max_layer_id; j++)
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rbsp_bit(rbsp, &vps->layer_id_included_flag[i][j]);
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rbsp_bit(rbsp, &vps->timing_info_present_flag);
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if (vps->timing_info_present_flag)
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rbsp_unsupported(rbsp);
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rbsp_bit(rbsp, &vps->extension_flag);
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if (vps->extension_flag)
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rbsp_unsupported(rbsp);
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}
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static void nal_hevc_rbsp_sub_layer_hrd_parameters(struct rbsp *rbsp,
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struct nal_hevc_sub_layer_hrd_parameters *hrd)
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{
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unsigned int i;
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unsigned int cpb_cnt = 1;
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for (i = 0; i < cpb_cnt; i++) {
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rbsp_uev(rbsp, &hrd->bit_rate_value_minus1[i]);
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rbsp_uev(rbsp, &hrd->cpb_size_value_minus1[i]);
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rbsp_bit(rbsp, &hrd->cbr_flag[i]);
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}
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}
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static void nal_hevc_rbsp_hrd_parameters(struct rbsp *rbsp,
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struct nal_hevc_hrd_parameters *hrd)
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{
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unsigned int i;
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unsigned int max_num_sub_layers_minus_1 = 0;
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rbsp_bit(rbsp, &hrd->nal_hrd_parameters_present_flag);
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rbsp_bit(rbsp, &hrd->vcl_hrd_parameters_present_flag);
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if (hrd->nal_hrd_parameters_present_flag || hrd->vcl_hrd_parameters_present_flag) {
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rbsp_bit(rbsp, &hrd->sub_pic_hrd_params_present_flag);
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if (hrd->sub_pic_hrd_params_present_flag) {
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rbsp_bits(rbsp, 8, &hrd->tick_divisor_minus2);
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rbsp_bits(rbsp, 5, &hrd->du_cpb_removal_delay_increment_length_minus1);
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rbsp_bit(rbsp, &hrd->sub_pic_cpb_params_in_pic_timing_sei_flag);
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rbsp_bits(rbsp, 5, &hrd->dpb_output_delay_du_length_minus1);
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}
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rbsp_bits(rbsp, 4, &hrd->bit_rate_scale);
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rbsp_bits(rbsp, 4, &hrd->cpb_size_scale);
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if (hrd->sub_pic_hrd_params_present_flag)
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rbsp_bits(rbsp, 4, &hrd->cpb_size_du_scale);
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rbsp_bits(rbsp, 5, &hrd->initial_cpb_removal_delay_length_minus1);
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rbsp_bits(rbsp, 5, &hrd->au_cpb_removal_delay_length_minus1);
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rbsp_bits(rbsp, 5, &hrd->dpb_output_delay_length_minus1);
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}
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for (i = 0; i <= max_num_sub_layers_minus_1; i++) {
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rbsp_bit(rbsp, &hrd->fixed_pic_rate_general_flag[i]);
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if (!hrd->fixed_pic_rate_general_flag[i])
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rbsp_bit(rbsp, &hrd->fixed_pic_rate_within_cvs_flag[i]);
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if (hrd->fixed_pic_rate_within_cvs_flag[i])
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rbsp_uev(rbsp, &hrd->elemental_duration_in_tc_minus1[i]);
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else
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rbsp_bit(rbsp, &hrd->low_delay_hrd_flag[i]);
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if (!hrd->low_delay_hrd_flag[i])
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rbsp_uev(rbsp, &hrd->cpb_cnt_minus1[i]);
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if (hrd->nal_hrd_parameters_present_flag)
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nal_hevc_rbsp_sub_layer_hrd_parameters(rbsp, &hrd->vcl_hrd[i]);
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if (hrd->vcl_hrd_parameters_present_flag)
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nal_hevc_rbsp_sub_layer_hrd_parameters(rbsp, &hrd->vcl_hrd[i]);
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}
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}
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static void nal_hevc_rbsp_vui_parameters(struct rbsp *rbsp,
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struct nal_hevc_vui_parameters *vui)
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{
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if (!vui) {
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rbsp->error = -EINVAL;
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return;
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}
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rbsp_bit(rbsp, &vui->aspect_ratio_info_present_flag);
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if (vui->aspect_ratio_info_present_flag) {
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rbsp_bits(rbsp, 8, &vui->aspect_ratio_idc);
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if (vui->aspect_ratio_idc == 255) {
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rbsp_bits(rbsp, 16, &vui->sar_width);
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rbsp_bits(rbsp, 16, &vui->sar_height);
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}
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}
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rbsp_bit(rbsp, &vui->overscan_info_present_flag);
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if (vui->overscan_info_present_flag)
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rbsp_bit(rbsp, &vui->overscan_appropriate_flag);
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rbsp_bit(rbsp, &vui->video_signal_type_present_flag);
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if (vui->video_signal_type_present_flag) {
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rbsp_bits(rbsp, 3, &vui->video_format);
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rbsp_bit(rbsp, &vui->video_full_range_flag);
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rbsp_bit(rbsp, &vui->colour_description_present_flag);
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if (vui->colour_description_present_flag) {
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rbsp_bits(rbsp, 8, &vui->colour_primaries);
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rbsp_bits(rbsp, 8, &vui->transfer_characteristics);
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rbsp_bits(rbsp, 8, &vui->matrix_coeffs);
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}
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}
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rbsp_bit(rbsp, &vui->chroma_loc_info_present_flag);
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if (vui->chroma_loc_info_present_flag) {
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rbsp_uev(rbsp, &vui->chroma_sample_loc_type_top_field);
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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);
|