/*
  * HEVC parameter set parsing
  *

  * This file is part of FFmpeg.

  *

  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVCODEC_HEVC_PS_H
 #define AVCODEC_HEVC_PS_H
 
 #include <stdint.h>
 
 #include "libavutil/buffer.h"
 #include "libavutil/pixfmt.h"
 #include "libavutil/rational.h"
 
 #include "avcodec.h"
 #include "get_bits.h"
 #include "hevc.h"
 
 typedef struct ShortTermRPS {
     unsigned int num_negative_pics;
     int num_delta_pocs;
     int rps_idx_num_delta_pocs;
     int32_t delta_poc[32];
     uint8_t used[32];
 } ShortTermRPS;
 

 typedef struct LongTermRPS {
     int     poc[32];
     uint8_t used[32];
     uint8_t nb_refs;
 } LongTermRPS;
 
 typedef struct SliceHeader {
     unsigned int pps_id;
 
     ///< address (in raster order) of the first block in the current slice segment
     unsigned int   slice_segment_addr;
     ///< address (in raster order) of the first block in the current slice
     unsigned int   slice_addr;
 
     enum HEVCSliceType slice_type;
 
     int pic_order_cnt_lsb;
 
     uint8_t first_slice_in_pic_flag;
     uint8_t dependent_slice_segment_flag;
     uint8_t pic_output_flag;
     uint8_t colour_plane_id;
 
     ///< RPS coded in the slice header itself is stored here
     int short_term_ref_pic_set_sps_flag;
     int short_term_ref_pic_set_size;
     ShortTermRPS slice_rps;
     const ShortTermRPS *short_term_rps;
     int long_term_ref_pic_set_size;
     LongTermRPS long_term_rps;
     unsigned int list_entry_lx[2][32];
 
     uint8_t rpl_modification_flag[2];
     uint8_t no_output_of_prior_pics_flag;
     uint8_t slice_temporal_mvp_enabled_flag;
 
     unsigned int nb_refs[2];
 
     uint8_t slice_sample_adaptive_offset_flag[3];
     uint8_t mvd_l1_zero_flag;
 
     uint8_t cabac_init_flag;
     uint8_t disable_deblocking_filter_flag; ///< slice_header_disable_deblocking_filter_flag
     uint8_t slice_loop_filter_across_slices_enabled_flag;
     uint8_t collocated_list;
 
     unsigned int collocated_ref_idx;
 
     int slice_qp_delta;
     int slice_cb_qp_offset;
     int slice_cr_qp_offset;
 
     uint8_t cu_chroma_qp_offset_enabled_flag;
 
     int beta_offset;    ///< beta_offset_div2 * 2
     int tc_offset;      ///< tc_offset_div2 * 2
 
     unsigned int max_num_merge_cand; ///< 5 - 5_minus_max_num_merge_cand
 
     unsigned *entry_point_offset;
     int * offset;
     int * size;
     int num_entry_point_offsets;
 
     int8_t slice_qp;
 
     uint8_t luma_log2_weight_denom;
     int16_t chroma_log2_weight_denom;
 
     int16_t luma_weight_l0[16];
     int16_t chroma_weight_l0[16][2];
     int16_t chroma_weight_l1[16][2];
     int16_t luma_weight_l1[16];
 
     int16_t luma_offset_l0[16];
     int16_t chroma_offset_l0[16][2];
 
     int16_t luma_offset_l1[16];
     int16_t chroma_offset_l1[16][2];
 
     int slice_ctb_addr_rs;
 } SliceHeader;
 

 typedef struct HEVCWindow {
     unsigned int left_offset;
     unsigned int right_offset;
     unsigned int top_offset;
     unsigned int bottom_offset;
 } HEVCWindow;
 
 typedef struct VUI {
     AVRational sar;
 
     int overscan_info_present_flag;
     int overscan_appropriate_flag;
 
     int video_signal_type_present_flag;
     int video_format;
     int video_full_range_flag;
     int colour_description_present_flag;
     uint8_t colour_primaries;
     uint8_t transfer_characteristic;
     uint8_t matrix_coeffs;
 
     int chroma_loc_info_present_flag;
     int chroma_sample_loc_type_top_field;
     int chroma_sample_loc_type_bottom_field;
     int neutra_chroma_indication_flag;
 
     int field_seq_flag;
     int frame_field_info_present_flag;
 
     int default_display_window_flag;
     HEVCWindow def_disp_win;
 
     int vui_timing_info_present_flag;
     uint32_t vui_num_units_in_tick;
     uint32_t vui_time_scale;
     int vui_poc_proportional_to_timing_flag;
     int vui_num_ticks_poc_diff_one_minus1;
     int vui_hrd_parameters_present_flag;
 
     int bitstream_restriction_flag;
     int tiles_fixed_structure_flag;
     int motion_vectors_over_pic_boundaries_flag;
     int restricted_ref_pic_lists_flag;
     int min_spatial_segmentation_idc;
     int max_bytes_per_pic_denom;
     int max_bits_per_min_cu_denom;
     int log2_max_mv_length_horizontal;
     int log2_max_mv_length_vertical;
 } VUI;
 
 typedef struct PTLCommon {
     uint8_t profile_space;
     uint8_t tier_flag;
     uint8_t profile_idc;
     uint8_t profile_compatibility_flag[32];
     uint8_t level_idc;
     uint8_t progressive_source_flag;
     uint8_t interlaced_source_flag;
     uint8_t non_packed_constraint_flag;
     uint8_t frame_only_constraint_flag;
 } PTLCommon;
 
 typedef struct PTL {
     PTLCommon general_ptl;
     PTLCommon sub_layer_ptl[HEVC_MAX_SUB_LAYERS];
 
     uint8_t sub_layer_profile_present_flag[HEVC_MAX_SUB_LAYERS];
     uint8_t sub_layer_level_present_flag[HEVC_MAX_SUB_LAYERS];
 } PTL;
 
 typedef struct HEVCVPS {
     uint8_t vps_temporal_id_nesting_flag;
     int vps_max_layers;
     int vps_max_sub_layers; ///< vps_max_temporal_layers_minus1 + 1
 
     PTL ptl;
     int vps_sub_layer_ordering_info_present_flag;
     unsigned int vps_max_dec_pic_buffering[HEVC_MAX_SUB_LAYERS];
     unsigned int vps_num_reorder_pics[HEVC_MAX_SUB_LAYERS];
     unsigned int vps_max_latency_increase[HEVC_MAX_SUB_LAYERS];
     int vps_max_layer_id;
     int vps_num_layer_sets; ///< vps_num_layer_sets_minus1 + 1
     uint8_t vps_timing_info_present_flag;
     uint32_t vps_num_units_in_tick;
     uint32_t vps_time_scale;
     uint8_t vps_poc_proportional_to_timing_flag;
     int vps_num_ticks_poc_diff_one; ///< vps_num_ticks_poc_diff_one_minus1 + 1
     int vps_num_hrd_parameters;

 
     uint8_t data[4096];
     int data_size;

 } HEVCVPS;
 
 typedef struct ScalingList {
     /* This is a little wasteful, since sizeID 0 only needs 8 coeffs,
      * and size ID 3 only has 2 arrays, not 6. */
     uint8_t sl[4][6][64];
     uint8_t sl_dc[2][6];
 } ScalingList;
 
 typedef struct HEVCSPS {

     unsigned vps_id;

     int chroma_format_idc;
     uint8_t separate_colour_plane_flag;
 
     HEVCWindow output_window;
 
     HEVCWindow pic_conf_win;
 
     int bit_depth;

     int bit_depth_chroma;

     int pixel_shift;
     enum AVPixelFormat pix_fmt;
 
     unsigned int log2_max_poc_lsb;
     int pcm_enabled_flag;
 
     int max_sub_layers;
     struct {
         int max_dec_pic_buffering;
         int num_reorder_pics;
         int max_latency_increase;
     } temporal_layer[HEVC_MAX_SUB_LAYERS];

     uint8_t temporal_id_nesting_flag;

 
     VUI vui;
     PTL ptl;
 
     uint8_t scaling_list_enable_flag;
     ScalingList scaling_list;
 
     unsigned int nb_st_rps;

     ShortTermRPS st_rps[HEVC_MAX_SHORT_TERM_REF_PIC_SETS];

 
     uint8_t amp_enabled_flag;
     uint8_t sao_enabled;
 
     uint8_t long_term_ref_pics_present_flag;

     uint16_t lt_ref_pic_poc_lsb_sps[HEVC_MAX_LONG_TERM_REF_PICS];
     uint8_t used_by_curr_pic_lt_sps_flag[HEVC_MAX_LONG_TERM_REF_PICS];

     uint8_t num_long_term_ref_pics_sps;
 
     struct {
         uint8_t bit_depth;
         uint8_t bit_depth_chroma;
         unsigned int log2_min_pcm_cb_size;
         unsigned int log2_max_pcm_cb_size;
         uint8_t loop_filter_disable_flag;
     } pcm;
     uint8_t sps_temporal_mvp_enabled_flag;
     uint8_t sps_strong_intra_smoothing_enable_flag;
 
     unsigned int log2_min_cb_size;
     unsigned int log2_diff_max_min_coding_block_size;
     unsigned int log2_min_tb_size;
     unsigned int log2_max_trafo_size;
     unsigned int log2_ctb_size;
     unsigned int log2_min_pu_size;
 
     int max_transform_hierarchy_depth_inter;
     int max_transform_hierarchy_depth_intra;
 

     int transform_skip_rotation_enabled_flag;
     int transform_skip_context_enabled_flag;
     int implicit_rdpcm_enabled_flag;
     int explicit_rdpcm_enabled_flag;
     int intra_smoothing_disabled_flag;

     int high_precision_offsets_enabled_flag;

     int persistent_rice_adaptation_enabled_flag;
 

     ///< coded frame dimension in various units
     int width;
     int height;
     int ctb_width;
     int ctb_height;
     int ctb_size;
     int min_cb_width;
     int min_cb_height;
     int min_tb_width;
     int min_tb_height;
     int min_pu_width;
     int min_pu_height;

     int tb_mask;

 
     int hshift[3];
     int vshift[3];
 
     int qp_bd_offset;

 
     uint8_t data[4096];
     int data_size;

 } HEVCSPS;
 
 typedef struct HEVCPPS {
     unsigned int sps_id; ///< seq_parameter_set_id
 
     uint8_t sign_data_hiding_flag;
 
     uint8_t cabac_init_present_flag;
 
     int num_ref_idx_l0_default_active; ///< num_ref_idx_l0_default_active_minus1 + 1
     int num_ref_idx_l1_default_active; ///< num_ref_idx_l1_default_active_minus1 + 1
     int pic_init_qp_minus26;
 
     uint8_t constrained_intra_pred_flag;
     uint8_t transform_skip_enabled_flag;
 
     uint8_t cu_qp_delta_enabled_flag;
     int diff_cu_qp_delta_depth;
 
     int cb_qp_offset;
     int cr_qp_offset;
     uint8_t pic_slice_level_chroma_qp_offsets_present_flag;
     uint8_t weighted_pred_flag;
     uint8_t weighted_bipred_flag;
     uint8_t output_flag_present_flag;
     uint8_t transquant_bypass_enable_flag;
 
     uint8_t dependent_slice_segments_enabled_flag;
     uint8_t tiles_enabled_flag;
     uint8_t entropy_coding_sync_enabled_flag;
 
     int num_tile_columns;   ///< num_tile_columns_minus1 + 1
     int num_tile_rows;      ///< num_tile_rows_minus1 + 1
     uint8_t uniform_spacing_flag;
     uint8_t loop_filter_across_tiles_enabled_flag;
 
     uint8_t seq_loop_filter_across_slices_enabled_flag;
 
     uint8_t deblocking_filter_control_present_flag;
     uint8_t deblocking_filter_override_enabled_flag;
     uint8_t disable_dbf;
     int beta_offset;    ///< beta_offset_div2 * 2
     int tc_offset;      ///< tc_offset_div2 * 2
 
     uint8_t scaling_list_data_present_flag;
     ScalingList scaling_list;
 
     uint8_t lists_modification_present_flag;
     int log2_parallel_merge_level; ///< log2_parallel_merge_level_minus2 + 2
     int num_extra_slice_header_bits;
     uint8_t slice_header_extension_present_flag;

     uint8_t log2_max_transform_skip_block_size;
     uint8_t cross_component_prediction_enabled_flag;
     uint8_t chroma_qp_offset_list_enabled_flag;
     uint8_t diff_cu_chroma_qp_offset_depth;
     uint8_t chroma_qp_offset_list_len_minus1;

     int8_t  cb_qp_offset_list[6];
     int8_t  cr_qp_offset_list[6];

     uint8_t log2_sao_offset_scale_luma;
     uint8_t log2_sao_offset_scale_chroma;

 
     // Inferred parameters
     unsigned int *column_width;  ///< ColumnWidth
     unsigned int *row_height;    ///< RowHeight
     unsigned int *col_bd;        ///< ColBd
     unsigned int *row_bd;        ///< RowBd
     int *col_idxX;
 
     int *ctb_addr_rs_to_ts; ///< CtbAddrRSToTS
     int *ctb_addr_ts_to_rs; ///< CtbAddrTSToRS
     int *tile_id;           ///< TileId
     int *tile_pos_rs;       ///< TilePosRS
     int *min_tb_addr_zs;    ///< MinTbAddrZS

     int *min_tb_addr_zs_tab;///< MinTbAddrZS
 
     uint8_t data[4096];
     int data_size;

 } HEVCPPS;
 
 typedef struct HEVCParamSets {
     AVBufferRef *vps_list[HEVC_MAX_VPS_COUNT];
     AVBufferRef *sps_list[HEVC_MAX_SPS_COUNT];
     AVBufferRef *pps_list[HEVC_MAX_PPS_COUNT];
 
     /* currently active parameter sets */
     const HEVCVPS *vps;
     const HEVCSPS *sps;
     const HEVCPPS *pps;
 } HEVCParamSets;
 
 /**
  * Parse the SPS from the bitstream into the provided HEVCSPS struct.
  *
  * @param sps_id the SPS id will be written here
  * @param apply_defdispwin if set 1, the default display window from the VUI
  *                         will be applied to the video dimensions
  * @param vps_list if non-NULL, this function will validate that the SPS refers
  *                 to an existing VPS
  */
 int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
                       int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx);
 
 int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
                            HEVCParamSets *ps);
 int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,
                            HEVCParamSets *ps, int apply_defdispwin);
 int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,
                            HEVCParamSets *ps);
 

 void ff_hevc_ps_uninit(HEVCParamSets *ps);
 

 int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
                                   ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header);
 
 int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id,
                            uint8_t *buf, int buf_size);
 

 /**
  * Compute POC of the current frame and return it.
  */
 int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type);
 

 #endif /* AVCODEC_HEVC_PS_H */