text: /*
   * Copyright 2021 Rockchip Electronics Co. LTD
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  #define MODULE_TAG "av1d_cbs"
  
  #include <string.h>
  
  #include "mpp_mem.h"
  #include "mpp_bitread.h"
  
  #include "av1d_parser.h"
  
  #ifndef UINT32_MAX
  #define UINT32_MAX 0xFFFFFFFF
  #endif
  
  #ifndef INT_MAX
  #define INT_MAX       2147483647      /* maximum (signed) int value */
  #endif
  
  #define BUFFER_PADDING_SIZE 64
  #define MAX_UINT_BITS(length) ((UINT64_C(1) << (length)) - 1)
  #define MAX_INT_BITS(length) ((INT64_C(1) << ((length) - 1)) - 1)
  #define MIN_INT_BITS(length) (-(INT64_C(1) << ((length) - 1)))
  /**
   * Clip a signed integer into the -(2^p),(2^p-1) range.
   * @param  a value to clip
   * @param  p bit position to clip at
   * @return clipped value
   */
  static   RK_U32 mpp_clip_uintp2(RK_S32 a, RK_S32 p)
  {
      if (a & ~((1 << p) - 1)) return -a >> 31 & ((1 << p) - 1);
      else                   return  a;
  }
  
  static RK_S32 mpp_av1_read_uvlc(BitReadCtx_t *gbc, const char *name, RK_U32 *write_to,
                                  RK_U32 range_min, RK_U32 range_max)
  {
      RK_U32 value;
  
      mpp_read_ue(gbc, &value);
  
      if (value < range_min || value > range_max) {
          mpp_err_f("%s out of range: "
                    "%d, but must be in [%d,%d].\n",
                    name, value, range_min, range_max);
          return MPP_NOK;
      }
      *write_to = value;
      return MPP_OK;
  }
  
  
  static RK_S32 mpp_av1_read_leb128(BitReadCtx_t *gbc, RK_U64 *write_to)
  {
      RK_U64 value;
      RK_S32 err = 0, i;
  
      value = 0;
      for (i = 0; i < 8; i++) {
          RK_U32 byte;
  
          READ_BITS(gbc, 8, &byte);
  
          if (err < 0)
              return err;
  
          value |= (RK_U64)(byte & 0x7f) << (i * 7);
          if (!(byte & 0x80))
              break;
      }
  
      if (value > UINT32_MAX)
          return MPP_NOK;
  
  
      *write_to = value;
      return MPP_OK;
  
  __bitread_error:
      return MPP_NOK;
  
  }
  
  static RK_S32 mpp_av1_read_ns(BitReadCtx_t *gbc, const char *name,
                                RK_U32 n, RK_U32 *write_to)
  {
      RK_U32 m, v, extra_bit, value;
      RK_S32 w;
  
      w = mpp_log2(n) + 1;
      m = (1 << w) - n;
  
      if (mpp_get_bits_left(gbc) < w) {
          mpp_err_f("Invalid non-symmetric value at "
                    "%s: bitstream ended.\n", name);
          return MPP_NOK;
      }
      if (w - 1 > 0)
          READ_BITS(gbc, w - 1, &v);
      else
          v = 0;
  
      if (v < m) {
          value = v;
      } else {
          READ_ONEBIT(gbc, &extra_bit);
          value = (v << 1) - m + extra_bit;
      }
  
      *write_to = value;
      return MPP_OK;
  
  __bitread_error:
      return MPP_NOK;
  
  }
  
  static RK_S32 mpp_av1_read_increment(BitReadCtx_t *gbc, RK_U32 range_min,
                                       RK_U32 range_max, const char *name,
                                       RK_U32 *write_to)
  {
      RK_U32 value;
      RK_S32 i;
      RK_S8 bits[33];
  
      mpp_assert(range_min <= range_max && range_max - range_min < sizeof(bits) - 1);
  
      for (i = 0, value = range_min; value < range_max;) {
          RK_U8 tmp = 0;
          if (mpp_get_bits_left(gbc) < 1) {
              mpp_err_f("Invalid increment value at "
                        "%s: bitstream ended.\n", name);
              return MPP_NOK;
          }
          READ_ONEBIT(gbc, &tmp);
          if (tmp) {
              bits[i++] = '1';
              ++value;
          } else {
              bits[i++] = '0';
              break;
          }
      }
      *write_to = value;
      return MPP_OK;
  
  __bitread_error:
      return MPP_NOK;
  }
  
  RK_S32 mpp_av1_read_unsigned(BitReadCtx_t *gbc,
                               RK_S32 width, const char *name,
                               RK_U32 *write_to, RK_U32 range_min,
                               RK_U32 range_max)
  {
      RK_U32 value;
  
      mpp_assert(width > 0 && width <= 32);
  
      if (mpp_get_bits_left(gbc) < width) {
          mpp_err_f("Invalid value at "
                    "%s: bitstream ended.\n", name);
          return MPP_NOK;
      }
  
      READ_BITS(gbc, width, &value);
  
      if (value < range_min || value > range_max) {
          mpp_err_f("%s out of range: "
                    "%d, but must be in [%d,%d].\n",
                    name, value, range_min, range_max);
          return MPP_NOK;
      }
  
      *write_to = value;
      return 0;
  
  __bitread_error:
      return MPP_NOK;
  
  }
  
  static RK_S32 sign_extend(RK_S32 val, RK_U8 bits)
  {
      RK_U8 shift = 8 * sizeof(RK_S32) - bits;
      union { RK_U8 u; RK_S32 s; } v = { (RK_U8) val << shift };
      return v.s >> shift;
  }
  
  RK_S32 mpp_av1_read_signed(BitReadCtx_t *gbc,
                             RK_S32 width, const char *name,
                             RK_S32 *write_to, RK_S32 range_min,
                             RK_S32 range_max)
  {
      RK_S32 value;
  
      mpp_assert(width > 0 && width <= 32);
  
      if (mpp_get_bits_left(gbc) < width) {
          mpp_err_f("Invalid value at "
                    "%s: bitstream ended.\n", name);
          return MPP_NOK;
      }
  
      READ_BITS(gbc, width, &value);
      value = sign_extend(value, width);
      if (value < range_min || value > range_max) {
          mpp_err_f("%s out of range: "
                    "%d, but must be in [%d,%d].\n",
                    name, value, range_min, range_max);
          return MPP_NOK;
      }
  
      *write_to = value;
      return 0;
  
  __bitread_error:
      return MPP_NOK;
  
  }
  
  static RK_S32 mpp_av1_read_subexp(BitReadCtx_t *gbc,
                                    RK_U32 range_max, RK_U32 *write_to)
  {
      RK_U32 value;
      RK_S32 err;
      RK_U32 max_len, len, range_offset, range_bits;
  
      max_len = mpp_log2(range_max - 1) - 3;
  
      err = mpp_av1_read_increment(gbc, 0, max_len, "subexp_more_bits", &len);
      if (err < 0)
          return err;
  
      if (len) {
          range_bits   = 2 + len;
          range_offset = 1 << range_bits;
      } else {
          range_bits   = 3;
          range_offset = 0;
      }
  
      if (len < max_len) {
          err = mpp_av1_read_unsigned(gbc, range_bits,
                                      "subexp_bits", &value,
                                      0, MAX_UINT_BITS(range_bits));
          if (err < 0)
              return err;
  
      } else {
          err = mpp_av1_read_ns(gbc, "subexp_final_bits", range_max - range_offset,
                                &value);
          if (err < 0)
              return err;
      }
      value += range_offset;
  
      *write_to = value;
      return err;
  }
  
  
  static RK_S32 mpp_av1_tile_log2(RK_S32 blksize, RK_S32 target)
  {
      RK_S32 k;
      for (k = 0; (blksize << k) < target; k++);
      return k;
  }
  
  static RK_S32 mpp_av1_get_relative_dist(const AV1RawSequenceHeader *seq,
                                          RK_U32 a, RK_U32 b)
  {
      RK_U32 diff, m;
      if (!seq->enable_order_hint)
          return 0;
      diff = a - b;
      m = 1 << seq->order_hint_bits_minus_1;
      diff = (diff & (m - 1)) - (diff & m);
      return diff;
  }
  
  static size_t mpp_av1_get_payload_bytes_left(BitReadCtx_t *gbc)
  {
      size_t size = 0;
      RK_U8 value = 0;
      RK_S32 i = 0;
  
      for (i = 0; mpp_get_bits_left(gbc) >= 8; i++) {
          READ_BITS(gbc, 8, &value);
          if (value)
              size = i;
      }
      return size;
  
  __bitread_error:
      return MPP_NOK;
  
  }
  
  #define CHECK(call) do { \
          err = (call); \
          if (err < 0) \
              return err; \
      } while (0)
  
  
  #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((RK_S32[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
  #define fb(width, name) \
          xf(width, name, current->name, 0, MAX_UINT_BITS(width), 0, )
  #define fc(width, name, range_min, range_max) \
          xf(width, name, current->name, range_min, range_max, 0, )
  #define flag(name) fb(1, name)
  #define su(width, name) \
          xsu(width, name, current->name, 0, )
  
  #define fbs(width, name, subs, ...) \
          xf(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
  #define fcs(width, name, range_min, range_max, subs, ...) \
          xf(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
  #define flags(name, subs, ...) \
          xf(1, name, current->name, 0, 1, subs, __VA_ARGS__)
  #define sus(width, name, subs, ...) \
          xsu(width, name, current->name, subs, __VA_ARGS__)
  
  #define xf(width, name, var, range_min, range_max, subs, ...) do { \
          RK_U32 value; \
          CHECK(mpp_av1_read_unsigned(gb, width, #name, \
                                     &value, range_min, range_max)); \
          var = value; \
      } while (0)
  
  #define xsu(width, name, var, subs, ...) do { \
          RK_S32 value; \
          CHECK(mpp_av1_read_signed(gb, width, #name, \
                                   &value, \
                                   MIN_INT_BITS(width), \
                                   MAX_INT_BITS(width))); \
          var = value; \
      } while (0)
  
  #define uvlc(name, range_min, range_max) do { \
          RK_U32 value; \
          CHECK(mpp_av1_read_uvlc(gb, #name, \
                                  &value, range_min, range_max)); \
          current->name = value; \
      } while (0)
  
  #define ns(max_value, name) do { \
          RK_U32 value; \
          CHECK(mpp_av1_read_ns(gb, #name, max_value, \
                                 &value)); \
          current->name = value; \
      } while (0)
  
  #define increment(name, min, max) do { \
          RK_U32 value; \
          CHECK(mpp_av1_read_increment(gb, min, max, #name, &value)); \
          current->name = value; \
      } while (0)
  
  #define subexp(name, max) do { \
          RK_U32 value = 0; \
          CHECK(mpp_av1_read_subexp(gb, max, \
                                    &value)); \
          current->name = value; \
      } while (0)
  
  #define delta_q(name) do { \
          RK_U8 delta_coded; \
          RK_S8 delta_q; \
          xf(1, name.delta_coded, delta_coded, 0, 1, 0, ); \
          if (delta_coded) \
              xsu(1 + 6, name.delta_q, delta_q, 0, ); \
          else \
              delta_q = 0; \
          current->name = delta_q; \
      } while (0)
  
  #define leb128(name) do { \
          RK_U64 value; \
          CHECK(mpp_av1_read_leb128(gb, &value)); \
          current->name = value; \
      } while (0)
  
  #define infer(name, value) do { \
          current->name = value; \
      } while (0)
  
  #define byte_alignment(gb) (mpp_get_bits_count(gb) % 8)
  
  static RK_S32 mpp_av1_read_obu_header(AV1Context *ctx, BitReadCtx_t *gb,
                                        AV1RawOBUHeader *current)
  {
      RK_S32 err;
  
      fc(1, obu_forbidden_bit, 0, 0);
  
      fc(4, obu_type, 0, AV1_OBU_PADDING);
      flag(obu_extension_flag);
      flag(obu_has_size_field);
  
      fc(1, obu_reserved_1bit, 0, 0);
  
      if (current->obu_extension_flag) {
          fb(3, temporal_id);
          fb(2, spatial_id);
          fc(3, extension_header_reserved_3bits, 0, 0);
      } else {
          infer(temporal_id, 0);
          infer(spatial_id, 0);
      }
  
      ctx->temporal_id = current->temporal_id;
      ctx->spatial_id  = current->spatial_id;
  
      return 0;
  }
  
  static RK_S32 mpp_av1_trailing_bits(AV1Context *ctx, BitReadCtx_t *gb, RK_S32 nb_bits)
  {
      (void)ctx;
      mpp_assert(nb_bits > 0);
  
      // fixed(1, trailing_one_bit, 1);
      mpp_skip_bits(gb, 1);
  
      --nb_bits;
  
      while (nb_bits > 0) {
          // fixed(1, trailing_zero_bit, 0);
          mpp_skip_bits(gb, 1);
          --nb_bits;
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_byte_alignment(AV1Context *ctx, BitReadCtx_t *gb)
  {
  
      (void)ctx;
  
      while (byte_alignment(gb) != 0)
          mpp_skip_bits(gb, 1);
      //fixed(1, zero_bit, 0);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_color_config(AV1Context *ctx, BitReadCtx_t *gb,
                                     AV1RawColorConfig *current, RK_S32 seq_profile)
  {
      RK_S32 err;
  
      flag(high_bitdepth);
  
      if (seq_profile == PROFILE_AV1_PROFESSIONAL &&
          current->high_bitdepth) {
          flag(twelve_bit);
          ctx->bit_depth = current->twelve_bit ? 12 : 10;
      } else {
          ctx->bit_depth = current->high_bitdepth ? 10 : 8;
      }
  
      if (seq_profile == PROFILE_AV1_HIGH)
          infer(mono_chrome, 0);
      else
          flag(mono_chrome);
      ctx->num_planes = current->mono_chrome ? 1 : 3;
  
      flag(color_description_present_flag);
      if (current->color_description_present_flag) {
          fb(8, color_primaries);
          fb(8, transfer_characteristics);
          fb(8, matrix_coefficients);
      } else {
          infer(color_primaries,          MPP_FRAME_PRI_UNSPECIFIED);
          infer(transfer_characteristics, MPP_FRAME_TRC_UNSPECIFIED);
          infer(matrix_coefficients,      MPP_FRAME_SPC_UNSPECIFIED);
      }
  
      if (current->mono_chrome) {
          flag(color_range);
  
          infer(subsampling_x, 1);
          infer(subsampling_y, 1);
          infer(chroma_sample_position, AV1_CSP_UNKNOWN);
          infer(separate_uv_delta_q, 0);
  
      } else if (current->color_primaries          == MPP_FRAME_PRI_BT709 &&
                 current->transfer_characteristics == MPP_FRAME_TRC_IEC61966_2_1 &&
                 current->matrix_coefficients      == MPP_FRAME_SPC_RGB) {
          infer(color_range,   1);
          infer(subsampling_x, 0);
          infer(subsampling_y, 0);
          flag(separate_uv_delta_q);
  
      } else {
          flag(color_range);
  
          if (seq_profile == PROFILE_AV1_MAIN) {
              infer(subsampling_x, 1);
              infer(subsampling_y, 1);
          } else if (seq_profile == PROFILE_AV1_HIGH) {
              infer(subsampling_x, 0);
              infer(subsampling_y, 0);
          } else {
              if (ctx->bit_depth == 12) {
                  fb(1, subsampling_x);
                  if (current->subsampling_x)
                      fb(1, subsampling_y);
                  else
                      infer(subsampling_y, 0);
              } else {
                  infer(subsampling_x, 1);
                  infer(subsampling_y, 0);
              }
          }
          if (current->subsampling_x && current->subsampling_y) {
              fc(2, chroma_sample_position, AV1_CSP_UNKNOWN,
                 AV1_CSP_COLOCATED);
          }
  
          flag(separate_uv_delta_q);
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_timing_info(AV1Context *ctx, BitReadCtx_t *gb,
                                    AV1RawTimingInfo *current)
  {
      (void)ctx;
      RK_S32 err;
  
      fc(32, num_units_in_display_tick, 1, MAX_UINT_BITS(32));
      fc(32, time_scale,                1, MAX_UINT_BITS(32));
  
      flag(equal_picture_interval);
      if (current->equal_picture_interval)
          uvlc(num_ticks_per_picture_minus_1, 0, MAX_UINT_BITS(32) - 1);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_decoder_model_info(AV1Context *ctx, BitReadCtx_t *gb,
                                           AV1RawDecoderModelInfo *current)
  {
      RK_S32 err;
      (void)ctx;
      fb(5, buffer_delay_length_minus_1);
      fb(32, num_units_in_decoding_tick);
      fb(5,  buffer_removal_time_length_minus_1);
      fb(5,  frame_presentation_time_length_minus_1);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_sequence_header_obu(AV1Context *ctx, BitReadCtx_t *gb,
                                            AV1RawSequenceHeader *current)
  {
      RK_S32 i, err;
  
      fc(3, seq_profile, PROFILE_AV1_MAIN,
         PROFILE_AV1_PROFESSIONAL);
      flag(still_picture);
      flag(reduced_still_picture_header);
  
      if (current->reduced_still_picture_header) {
          infer(timing_info_present_flag,           0);
          infer(decoder_model_info_present_flag,    0);
          infer(initial_display_delay_present_flag, 0);
          infer(operating_points_cnt_minus_1,       0);
          infer(operating_point_idc[0],             0);
  
          fb(5, seq_level_idx[0]);
  
          infer(seq_tier[0], 0);
          infer(decoder_model_present_for_this_op[0],         0);
          infer(initial_display_delay_present_for_this_op[0], 0);
  
      } else {
          flag(timing_info_present_flag);
          if (current->timing_info_present_flag) {
              CHECK(mpp_av1_timing_info(ctx, gb, &current->timing_info));
  
              flag(decoder_model_info_present_flag);
              if (current->decoder_model_info_present_flag) {
                  CHECK(mpp_av1_decoder_model_info
                        (ctx, gb, &current->decoder_model_info));
              }
          } else {
              infer(decoder_model_info_present_flag, 0);
          }
  
          flag(initial_display_delay_present_flag);
  
          fb(5, operating_points_cnt_minus_1);
          for (i = 0; i <= current->operating_points_cnt_minus_1; i++) {
              fbs(12, operating_point_idc[i], 1, i);
              fbs(5,  seq_level_idx[i], 1, i);
  
              if (current->seq_level_idx[i] > 7)
                  flags(seq_tier[i], 1, i);
              else
                  infer(seq_tier[i], 0);
  
              if (current->decoder_model_info_present_flag) {
                  flags(decoder_model_present_for_this_op[i], 1, i);
                  if (current->decoder_model_present_for_this_op[i]) {
                      RK_S32 n = current->decoder_model_info.buffer_delay_length_minus_1 + 1;
                      fbs(n, decoder_buffer_delay[i], 1, i);
                      fbs(n, encoder_buffer_delay[i], 1, i);
                      flags(low_delay_mode_flag[i], 1, i);
                  }
              } else {
                  infer(decoder_model_present_for_this_op[i], 0);
              }
  
              if (current->initial_display_delay_present_flag) {
                  flags(initial_display_delay_present_for_this_op[i], 1, i);
                  if (current->initial_display_delay_present_for_this_op[i])
                      fbs(4, initial_display_delay_minus_1[i], 1, i);
              }
          }
      }
  
      fb(4, frame_width_bits_minus_1);
      fb(4, frame_height_bits_minus_1);
  
      fb(current->frame_width_bits_minus_1  + 1, max_frame_width_minus_1);
      fb(current->frame_height_bits_minus_1 + 1, max_frame_height_minus_1);
  
      if (current->reduced_still_picture_header)
          infer(frame_id_numbers_present_flag, 0);
      else
          flag(frame_id_numbers_present_flag);
      if (current->frame_id_numbers_present_flag) {
          fb(4, delta_frame_id_length_minus_2);
          fb(3, additional_frame_id_length_minus_1);
      }
  
      flag(use_128x128_superblock);
      flag(enable_filter_intra);
      flag(enable_intra_edge_filter);
  
      if (current->reduced_still_picture_header) {
          infer(enable_interintra_compound, 0);
          infer(enable_masked_compound,     0);
          infer(enable_warped_motion,       0);
          infer(enable_dual_filter,         0);
          infer(enable_order_hint,          0);
          infer(enable_jnt_comp,            0);
          infer(enable_ref_frame_mvs,       0);
  
          infer(seq_force_screen_content_tools,
                AV1_SELECT_SCREEN_CONTENT_TOOLS);
          infer(seq_force_integer_mv,
                AV1_SELECT_INTEGER_MV);
      } else {
          flag(enable_interintra_compound);
          flag(enable_masked_compound);
          flag(enable_warped_motion);
          flag(enable_dual_filter);
  
          flag(enable_order_hint);
          if (current->enable_order_hint) {
              flag(enable_jnt_comp);
              flag(enable_ref_frame_mvs);
          } else {
              infer(enable_jnt_comp,      0);
              infer(enable_ref_frame_mvs, 0);
          }
  
          flag(seq_choose_screen_content_tools);
          if (current->seq_choose_screen_content_tools)
              infer(seq_force_screen_content_tools,
                    AV1_SELECT_SCREEN_CONTENT_TOOLS);
          else
              fb(1, seq_force_screen_content_tools);
          if (current->seq_force_screen_content_tools > 0) {
              flag(seq_choose_integer_mv);
              if (current->seq_choose_integer_mv)
                  infer(seq_force_integer_mv,
                        AV1_SELECT_INTEGER_MV);
              else
                  fb(1, seq_force_integer_mv);
          } else {
              infer(seq_force_integer_mv, AV1_SELECT_INTEGER_MV);
          }
  
          if (current->enable_order_hint)
              fb(3, order_hint_bits_minus_1);
      }
  
      flag(enable_superres);
      flag(enable_cdef);
      flag(enable_restoration);
  
      CHECK(mpp_av1_color_config(ctx, gb, &current->color_config,
                                 current->seq_profile));
  
      flag(film_grain_params_present);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_temporal_delimiter_obu(AV1Context *ctx, BitReadCtx_t *gb)
  {
      (void)gb;
      ctx->seen_frame_header = 0;
  
      return 0;
  }
  static RK_S32 mpp_av1_set_frame_refs(AV1Context *ctx, BitReadCtx_t *gb,
                                       AV1RawFrameHeader *current)
  {
      (void)gb;
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      static const RK_U8 ref_frame_list[AV1_NUM_REF_FRAMES - 2] = {
          AV1_REF_FRAME_LAST2, AV1_REF_FRAME_LAST3, AV1_REF_FRAME_BWDREF,
          AV1_REF_FRAME_ALTREF2, AV1_REF_FRAME_ALTREF
      };
      RK_S8 ref_frame_idx[AV1_REFS_PER_FRAME], used_frame[AV1_NUM_REF_FRAMES];
      RK_S8 shifted_order_hints[AV1_NUM_REF_FRAMES];
      RK_S32 cur_frame_hint, latest_order_hint, earliest_order_hint, ref;
      RK_S32 i, j;
  
      for (i = 0; i < AV1_REFS_PER_FRAME; i++)
          ref_frame_idx[i] = -1;
      ref_frame_idx[AV1_REF_FRAME_LAST - AV1_REF_FRAME_LAST] = current->last_frame_idx;
      ref_frame_idx[AV1_REF_FRAME_GOLDEN - AV1_REF_FRAME_LAST] = current->golden_frame_idx;
  
      for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
          used_frame[i] = 0;
      used_frame[current->last_frame_idx] = 1;
      used_frame[current->golden_frame_idx] = 1;
  
      cur_frame_hint = 1 << (seq->order_hint_bits_minus_1);
      for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
          shifted_order_hints[i] = cur_frame_hint +
                                   mpp_av1_get_relative_dist(seq, ctx->ref_s[i].order_hint,
                                                             ctx->order_hint);
  
      latest_order_hint = shifted_order_hints[current->last_frame_idx];
      earliest_order_hint = shifted_order_hints[current->golden_frame_idx];
  
      ref = -1;
      for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
          RK_S32 hint = shifted_order_hints[i];
          if (!used_frame[i] && hint >= cur_frame_hint &&
              (ref < 0 || hint >= latest_order_hint)) {
              ref = i;
              latest_order_hint = hint;
          }
      }
      if (ref >= 0) {
          ref_frame_idx[AV1_REF_FRAME_ALTREF - AV1_REF_FRAME_LAST] = ref;
          used_frame[ref] = 1;
      }
  
      ref = -1;
      for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
          RK_S32 hint = shifted_order_hints[i];
          if (!used_frame[i] && hint >= cur_frame_hint &&
              (ref < 0 || hint < earliest_order_hint)) {
              ref = i;
              earliest_order_hint = hint;
          }
      }
      if (ref >= 0) {
          ref_frame_idx[AV1_REF_FRAME_BWDREF - AV1_REF_FRAME_LAST] = ref;
          used_frame[ref] = 1;
      }
  
      ref = -1;
      for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
          RK_S32 hint = shifted_order_hints[i];
          if (!used_frame[i] && hint >= cur_frame_hint &&
              (ref < 0 || hint < earliest_order_hint)) {
              ref = i;
              earliest_order_hint = hint;
          }
      }
      if (ref >= 0) {
          ref_frame_idx[AV1_REF_FRAME_ALTREF2 - AV1_REF_FRAME_LAST] = ref;
          used_frame[ref] = 1;
      }
  
      for (i = 0; i < AV1_REFS_PER_FRAME - 2; i++) {
          RK_S32 ref_frame = ref_frame_list[i];
          if (ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] < 0 ) {
              ref = -1;
              for (j = 0; j < AV1_NUM_REF_FRAMES; j++) {
                  RK_S32 hint = shifted_order_hints[j];
                  if (!used_frame[j] && hint < cur_frame_hint &&
                      (ref < 0 || hint >= latest_order_hint)) {
                      ref = j;
                      latest_order_hint = hint;
                  }
              }
              if (ref >= 0) {
                  ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] = ref;
                  used_frame[ref] = 1;
              }
          }
      }
  
      ref = -1;
      for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
          RK_S32 hint = shifted_order_hints[i];
          if (ref < 0 || hint < earliest_order_hint) {
              ref = i;
              earliest_order_hint = hint;
          }
      }
      for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
          if (ref_frame_idx[i] < 0)
              ref_frame_idx[i] = ref;
          infer(ref_frame_idx[i], ref_frame_idx[i]);
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_superres_params(AV1Context *ctx, BitReadCtx_t *gb,
                                        AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 denom, err;
  
      if (seq->enable_superres)
          flag(use_superres);
      else
          infer(use_superres, 0);
  
      if (current->use_superres) {
          fb(3, coded_denom);
          denom = current->coded_denom + AV1_SUPERRES_DENOM_MIN;
      } else {
          denom = AV1_SUPERRES_NUM;
      }
  
      ctx->upscaled_width = ctx->frame_width;
      ctx->frame_width = (ctx->upscaled_width * AV1_SUPERRES_NUM +
                          denom / 2) / denom;
      return 0;
  }
  
  static RK_S32 mpp_av1_frame_size(AV1Context *ctx, BitReadCtx_t *gb,
                                   AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 err;
  
      if (current->frame_size_override_flag) {
          fb(seq->frame_width_bits_minus_1 + 1,  frame_width_minus_1);
          fb(seq->frame_height_bits_minus_1 + 1, frame_height_minus_1);
      } else {
          infer(frame_width_minus_1,  seq->max_frame_width_minus_1);
          infer(frame_height_minus_1, seq->max_frame_height_minus_1);
      }
  
      ctx->frame_width  = current->frame_width_minus_1  + 1;
      ctx->frame_height = current->frame_height_minus_1 + 1;
  
      CHECK(mpp_av1_superres_params(ctx, gb, current));
  
      return 0;
  }
  
  static RK_S32 mpp_av1_render_size(AV1Context *ctx, BitReadCtx_t *gb,
                                    AV1RawFrameHeader *current)
  {
      RK_S32 err;
  
      flag(render_and_frame_size_different);
  
      if (current->render_and_frame_size_different) {
          fb(16, render_width_minus_1);
          fb(16, render_height_minus_1);
      } else {
          infer(render_width_minus_1,  current->frame_width_minus_1);
          infer(render_height_minus_1, current->frame_height_minus_1);
      }
  
      ctx->render_width  = current->render_width_minus_1  + 1;
      ctx->render_height = current->render_height_minus_1 + 1;
  
      return 0;
  }
  
  static RK_S32 mpp_av1_frame_size_with_refs(AV1Context *ctx, BitReadCtx_t *gb,
                                             AV1RawFrameHeader *current)
  {
      RK_S32 i, err;
  
      for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
          flags(found_ref[i], 1, i);
          if (current->found_ref[i]) {
              AV1ReferenceFrameState *ref =
                  &ctx->ref_s[current->ref_frame_idx[i]];
  
              if (!ref->valid) {
                  mpp_err_f("Missing reference frame needed for frame size "
                            "(ref = %d, ref_frame_idx = %d).\n",
                            i, current->ref_frame_idx[i]);
                  return MPP_ERR_PROTOL;
              }
  
              infer(frame_width_minus_1,   ref->upscaled_width - 1);
              infer(frame_height_minus_1,  ref->frame_height - 1);
              infer(render_width_minus_1,  ref->render_width - 1);
              infer(render_height_minus_1, ref->render_height - 1);
  
              ctx->upscaled_width = ref->upscaled_width;
              ctx->frame_width    = ctx->upscaled_width;
              ctx->frame_height   = ref->frame_height;
              ctx->render_width   = ref->render_width;
              ctx->render_height  = ref->render_height;
              break;
          }
      }
  
      if (i >= AV1_REFS_PER_FRAME) {
          CHECK(mpp_av1_frame_size(ctx, gb, current));
          CHECK(mpp_av1_render_size(ctx, gb, current));
      } else {
          CHECK(mpp_av1_superres_params(ctx, gb, current));
      }
  
      return 0;
  }
  
  static RK_S32  mpp_av1_interpolation_filter(AV1Context *ctx, BitReadCtx_t *gb,
                                              AV1RawFrameHeader *current)
  {
      RK_S32 err;
      (void)ctx;
      flag(is_filter_switchable);
      if (current->is_filter_switchable)
          infer(interpolation_filter,
                AV1_INTERPOLATION_FILTER_SWITCHABLE);
      else
          fb(2, interpolation_filter);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_tile_info(AV1Context *ctx, BitReadCtx_t *gb,
                                  AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 mi_cols, mi_rows, sb_cols, sb_rows, sb_shift, sb_size;
      RK_S32 max_tile_width_sb, max_tile_height_sb, max_tile_area_sb;
      RK_S32 min_log2_tile_cols, max_log2_tile_cols, max_log2_tile_rows;
      RK_S32 min_log2_tiles, min_log2_tile_rows;
      RK_S32 i, err;
  
      mi_cols = 2 * ((ctx->frame_width  + 7) >> 3);
      mi_rows = 2 * ((ctx->frame_height + 7) >> 3);
  
      sb_cols = seq->use_128x128_superblock ? ((mi_cols + 31) >> 5)
                : ((mi_cols + 15) >> 4);
      sb_rows = seq->use_128x128_superblock ? ((mi_rows + 31) >> 5)
                : ((mi_rows + 15) >> 4);
  
      sb_shift = seq->use_128x128_superblock ? 5 : 4;
      sb_size  = sb_shift + 2;
  
      max_tile_width_sb = AV1_MAX_TILE_WIDTH >> sb_size;
      max_tile_area_sb  = AV1_MAX_TILE_AREA  >> (2 * sb_size);
  
      min_log2_tile_cols = mpp_av1_tile_log2(max_tile_width_sb, sb_cols);
      max_log2_tile_cols = mpp_av1_tile_log2(1, MPP_MIN(sb_cols, AV1_MAX_TILE_COLS));
      max_log2_tile_rows = mpp_av1_tile_log2(1, MPP_MIN(sb_rows, AV1_MAX_TILE_ROWS));
      min_log2_tiles = MPP_MAX(min_log2_tile_cols,
                               mpp_av1_tile_log2(max_tile_area_sb, sb_rows * sb_cols));
  
      flag(uniform_tile_spacing_flag);
  
      if (current->uniform_tile_spacing_flag) {
          RK_S32 tile_width_sb, tile_height_sb;
  
          increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
  
          tile_width_sb = (sb_cols + (1 << current->tile_cols_log2) - 1) >>
                          current->tile_cols_log2;
          current->tile_cols = (sb_cols + tile_width_sb - 1) / tile_width_sb;
  
          min_log2_tile_rows = MPP_MAX(min_log2_tiles - current->tile_cols_log2, 0);
  
          increment(tile_rows_log2, min_log2_tile_rows, max_log2_tile_rows);
  
          tile_height_sb = (sb_rows + (1 << current->tile_rows_log2) - 1) >>
                           current->tile_rows_log2;
          current->tile_rows = (sb_rows + tile_height_sb - 1) / tile_height_sb;
  
          for (i = 0; i < current->tile_cols - 1; i++)
              infer(width_in_sbs_minus_1[i], tile_width_sb - 1);
          infer(width_in_sbs_minus_1[i],
                sb_cols - (current->tile_cols - 1) * tile_width_sb - 1);
          for (i = 0; i < current->tile_rows - 1; i++)
              infer(height_in_sbs_minus_1[i], tile_height_sb - 1);
          infer(height_in_sbs_minus_1[i],
                sb_rows - (current->tile_rows - 1) * tile_height_sb - 1);
  
      } else {
          RK_S32 widest_tile_sb, start_sb, size_sb, max_width, max_height;
  
          widest_tile_sb = 0;
  
          start_sb = 0;
          for (i = 0; start_sb < sb_cols && i < AV1_MAX_TILE_COLS; i++) {
              max_width = MPP_MIN(sb_cols - start_sb, max_tile_width_sb);
              ns(max_width, width_in_sbs_minus_1[i]);
              //ns(max_width, width_in_sbs_minus_1[i]);
              size_sb = current->width_in_sbs_minus_1[i] + 1;
              widest_tile_sb = MPP_MAX(size_sb, widest_tile_sb);
              start_sb += size_sb;
          }
          current->tile_cols_log2 = mpp_av1_tile_log2(1, i);
          current->tile_cols = i;
  
          if (min_log2_tiles > 0)
              max_tile_area_sb = (sb_rows * sb_cols) >> (min_log2_tiles + 1);
          else
              max_tile_area_sb = sb_rows * sb_cols;
          max_tile_height_sb = MPP_MAX(max_tile_area_sb / widest_tile_sb, 1);
  
          start_sb = 0;
          for (i = 0; start_sb < sb_rows && i < AV1_MAX_TILE_ROWS; i++) {
              max_height = MPP_MIN(sb_rows - start_sb, max_tile_height_sb);
              ns(max_height, height_in_sbs_minus_1[i]);
              size_sb = current->height_in_sbs_minus_1[i] + 1;
              start_sb += size_sb;
          }
          current->tile_rows_log2 = mpp_av1_tile_log2(1, i);
          current->tile_rows = i;
      }
  
      if (current->tile_cols_log2 > 0 ||
          current->tile_rows_log2 > 0) {
          fb(current->tile_cols_log2 + current->tile_rows_log2,
             context_update_tile_id);
          fb(2, tile_size_bytes_minus1);
      } else {
          infer(context_update_tile_id, 0);
          current->tile_size_bytes_minus1 = 3;
      }
  
      ctx->tile_cols = current->tile_cols;
      ctx->tile_rows = current->tile_rows;
  
      return 0;
  }
  
  static RK_S32 mpp_av1_quantization_params(AV1Context *ctx, BitReadCtx_t *gb,
                                            AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 err;
  
      fb(8, base_q_idx);
  
      delta_q(delta_q_y_dc);
  
      if (ctx->num_planes > 1) {
          if (seq->color_config.separate_uv_delta_q)
              flag(diff_uv_delta);
          else
              infer(diff_uv_delta, 0);
  
          delta_q(delta_q_u_dc);
          delta_q(delta_q_u_ac);
  
          if (current->diff_uv_delta) {
              delta_q(delta_q_v_dc);
              delta_q(delta_q_v_ac);
          } else {
              infer(delta_q_v_dc, current->delta_q_u_dc);
              infer(delta_q_v_ac, current->delta_q_u_ac);
          }
      } else {
          infer(delta_q_u_dc, 0);
          infer(delta_q_u_ac, 0);
          infer(delta_q_v_dc, 0);
          infer(delta_q_v_ac, 0);
      }
  
      flag(using_qmatrix);
      if (current->using_qmatrix) {
          fb(4, qm_y);
          fb(4, qm_u);
          if (seq->color_config.separate_uv_delta_q)
              fb(4, qm_v);
          else
              infer(qm_v, current->qm_u);
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_segmentation_params(AV1Context *ctx, BitReadCtx_t *gb,
                                            AV1RawFrameHeader *current)
  {
      static const RK_U8 bits[AV1_SEG_LVL_MAX] = { 8, 6, 6, 6, 6, 3, 0, 0 };
      static const RK_U8 sign[AV1_SEG_LVL_MAX] = { 1, 1, 1, 1, 1, 0, 0, 0 };
      static const RK_U8 default_feature_enabled[AV1_SEG_LVL_MAX] = { 0 };
      static const RK_S16 default_feature_value[AV1_SEG_LVL_MAX] = { 0 };
      RK_S32 i, j, err;
  
      flag(segmentation_enabled);
  
      if (current->segmentation_enabled) {
          if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
              infer(segmentation_update_map,      1);
              infer(segmentation_temporal_update, 0);
              infer(segmentation_update_data,     1);
          } else {
              flag(segmentation_update_map);
              if (current->segmentation_update_map)
                  flag(segmentation_temporal_update);
              else
                  infer(segmentation_temporal_update, 0);
              flag(segmentation_update_data);
          }
  
          for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
              const RK_U8 *ref_feature_enabled;
              const RK_S16 *ref_feature_value;
  
              if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
                  ref_feature_enabled = default_feature_enabled;
                  ref_feature_value = default_feature_value;
              } else {
                  ref_feature_enabled =
                      ctx->ref_s[current->ref_frame_idx[current->primary_ref_frame]].feature_enabled[i];
                  ref_feature_value =
                      ctx->ref_s[current->ref_frame_idx[current->primary_ref_frame]].feature_value[i];
              }
  
              for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
                  if (current->segmentation_update_data) {
                      flags(feature_enabled[i][j], 2, i, j);
  
                      if (current->feature_enabled[i][j] && bits[j] > 0) {
                          if (sign[j])
                              sus(1 + bits[j], feature_value[i][j], 2, i, j);
                          else
                              fbs(bits[j], feature_value[i][j], 2, i, j);
                      } else {
                          infer(feature_value[i][j], 0);
                      }
                  } else {
                      infer(feature_enabled[i][j], ref_feature_enabled[j]);
                      infer(feature_value[i][j], ref_feature_value[j]);
                  }
              }
          }
      } else {
          for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
              for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
                  infer(feature_enabled[i][j], 0);
                  infer(feature_value[i][j],   0);
              }
          }
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_delta_q_params(AV1Context *ctx, BitReadCtx_t *gb,
                                       AV1RawFrameHeader *current)
  {
      RK_S32 err;
      (void)ctx;
      if (current->base_q_idx > 0)
          flag(delta_q_present);
      else
          infer(delta_q_present, 0);
  
      if (current->delta_q_present)
          fb(2, delta_q_res);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_delta_lf_params(AV1Context *ctx, BitReadCtx_t *gb,
                                        AV1RawFrameHeader *current)
  {
      RK_S32 err;
      (void)ctx;
      if (current->delta_q_present) {
          if (!current->allow_intrabc)
              flag(delta_lf_present);
          else
              infer(delta_lf_present, 0);
          if (current->delta_lf_present) {
              fb(2, delta_lf_res);
              flag(delta_lf_multi);
          } else {
              infer(delta_lf_res,   0);
              infer(delta_lf_multi, 0);
          }
      } else {
          infer(delta_lf_present, 0);
          infer(delta_lf_res,     0);
          infer(delta_lf_multi,   0);
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_loop_filter_params(AV1Context *ctx, BitReadCtx_t *gb,
                                           AV1RawFrameHeader *current)
  {
      static const RK_S8 default_loop_filter_ref_deltas[AV1_TOTAL_REFS_PER_FRAME] =
      { 1, 0, 0, 0, -1, 0, -1, -1 };
      static const RK_S8 default_loop_filter_mode_deltas[2] = { 0, 0 };
      RK_S32 i, err;
  
      if (ctx->coded_lossless || current->allow_intrabc) {
          infer(loop_filter_level[0], 0);
          infer(loop_filter_level[1], 0);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_INTRA],    1);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST],     0);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST2],    0);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST3],    0);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_BWDREF],   0);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_GOLDEN],  -1);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF],  -1);
          infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF2], -1);
          for (i = 0; i < 2; i++)
              infer(loop_filter_mode_deltas[i], 0);
          return 0;
      }
  
      fb(6, loop_filter_level[0]);
      fb(6, loop_filter_level[1]);
  
      if (ctx->num_planes > 1) {
          if (current->loop_filter_level[0] ||
              current->loop_filter_level[1]) {
              fb(6, loop_filter_level[2]);
              fb(6, loop_filter_level[3]);
          }
      }
  
      fb(3, loop_filter_sharpness);
  
      flag(loop_filter_delta_enabled);
      if (current->loop_filter_delta_enabled) {
          const RK_S8 *ref_loop_filter_ref_deltas, *ref_loop_filter_mode_deltas;
  
          if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
              ref_loop_filter_ref_deltas = default_loop_filter_ref_deltas;
              ref_loop_filter_mode_deltas = default_loop_filter_mode_deltas;
          } else {
              ref_loop_filter_ref_deltas =
                  ctx->ref_s[current->ref_frame_idx[current->primary_ref_frame]].loop_filter_ref_deltas;
              ref_loop_filter_mode_deltas =
                  ctx->ref_s[current->ref_frame_idx[current->primary_ref_frame]].loop_filter_mode_deltas;
          }
  
          flag(loop_filter_delta_update);
          for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
              if (current->loop_filter_delta_update)
                  flags(update_ref_delta[i], 1, i);
              else
                  infer(update_ref_delta[i], 0);
              if (current->update_ref_delta[i])
                  sus(1 + 6, loop_filter_ref_deltas[i], 1, i);
              else
                  infer(loop_filter_ref_deltas[i], ref_loop_filter_ref_deltas[i]);
          }
          for (i = 0; i < 2; i++) {
              if (current->loop_filter_delta_update)
                  flags(update_mode_delta[i], 1, i);
              else
                  infer(update_mode_delta[i], 0);
              if (current->update_mode_delta[i])
                  sus(1 + 6, loop_filter_mode_deltas[i], 1, i);
              else
                  infer(loop_filter_mode_deltas[i], ref_loop_filter_mode_deltas[i]);
          }
      } else {
          for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++)
              infer(loop_filter_ref_deltas[i], default_loop_filter_ref_deltas[i]);
          for (i = 0; i < 2; i++)
              infer(loop_filter_mode_deltas[i], default_loop_filter_mode_deltas[i]);
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_cdef_params(AV1Context *ctx, BitReadCtx_t *gb,
                                    AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 i, err;
      if (ctx->coded_lossless || current->allow_intrabc ||
          !seq->enable_cdef) {
          infer(cdef_damping_minus_3, 0);
          infer(cdef_bits, 0);
          infer(cdef_y_pri_strength[0],  0);
          infer(cdef_y_sec_strength[0],  0);
          infer(cdef_uv_pri_strength[0], 0);
          infer(cdef_uv_sec_strength[0], 0);
  
          return 0;
      }
  
      fb(2, cdef_damping_minus_3);
      fb(2, cdef_bits);
  
      for (i = 0; i < (1 << current->cdef_bits); i++) {
          fbs(4, cdef_y_pri_strength[i], 1, i);
          fbs(2, cdef_y_sec_strength[i], 1, i);
  
          if (ctx->num_planes > 1) {
              fbs(4, cdef_uv_pri_strength[i], 1, i);
              fbs(2, cdef_uv_sec_strength[i], 1, i);
          }
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_lr_params(AV1Context *ctx, BitReadCtx_t *gb,
                                  AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 uses_lr,  uses_chroma_lr;
      RK_S32 i, err;
  
      if (ctx->all_lossless || current->allow_intrabc ||
          !seq->enable_restoration) {
          return 0;
      }
  
      uses_lr = uses_chroma_lr = 0;
      for (i = 0; i < ctx->num_planes; i++) {
          fbs(2, lr_type[i], 1, i);
  
          if (current->lr_type[i] != AV1_RESTORE_NONE) {
              uses_lr = 1;
              if (i > 0)
                  uses_chroma_lr = 1;
          }
      }
  
      if (uses_lr) {
          if (seq->use_128x128_superblock)
              increment(lr_unit_shift, 1, 2);
          else
              increment(lr_unit_shift, 0, 2);
  
          if (seq->color_config.subsampling_x &&
              seq->color_config.subsampling_y && uses_chroma_lr) {
              fb(1, lr_uv_shift);
          } else {
              infer(lr_uv_shift, 0);
          }
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_read_tx_mode(AV1Context *ctx, BitReadCtx_t *gb,
                                     AV1RawFrameHeader *current)
  {
      RK_S32 err;
  
      if (ctx->coded_lossless)
          infer(tx_mode, 0);
      else
          increment(tx_mode, 1, 2);
      if (current->tx_mode == 1) {
          current->tx_mode = 3;
      } else {
          current->tx_mode = 4;
      }
      return 0;
  }
  
  static RK_S32 mpp_av1_frame_reference_mode(AV1Context *ctx, BitReadCtx_t *gb,
                                             AV1RawFrameHeader *current)
  {
      RK_S32 err;
      (void)ctx;
      if (current->frame_type == AV1_FRAME_INTRA_ONLY ||
          current->frame_type == AV1_FRAME_KEY)
          infer(reference_select, 0);
      else
          flag(reference_select);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_skip_mode_params(AV1Context *ctx, BitReadCtx_t *gb,
                                         AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 skip_mode_allowed;
      RK_S32 err;
  
      if (current->frame_type == AV1_FRAME_KEY ||
          current->frame_type == AV1_FRAME_INTRA_ONLY ||
          !current->reference_select || !seq->enable_order_hint) {
          skip_mode_allowed = 0;
      } else {
          RK_S32 forward_idx,  backward_idx;
          RK_S32 forward_hint, backward_hint;
          RK_S32 ref_hint, dist, i;
  
          forward_idx  = -1;
          backward_idx = -1;
          forward_hint = -1;
          backward_hint = -1;
          for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
              ref_hint = ctx->ref_s[current->ref_frame_idx[i]].order_hint;
              dist = mpp_av1_get_relative_dist(seq, ref_hint,
                                               ctx->order_hint);
              if (dist < 0) {
                  if (forward_idx < 0 ||
                      mpp_av1_get_relative_dist(seq, ref_hint,
                                                forward_hint) > 0) {
                      forward_idx  = i;
                      forward_hint = ref_hint;
                  }
              } else if (dist > 0) {
                  if (backward_idx < 0 ||
                      mpp_av1_get_relative_dist(seq, ref_hint,
                                                backward_hint) < 0) {
                      backward_idx  = i;
                      backward_hint = ref_hint;
                  }
              }
          }
  
          if (forward_idx < 0) {
              skip_mode_allowed = 0;
          } else if (backward_idx >= 0) {
              skip_mode_allowed = 1;
              ctx->skip_ref0 = MPP_MIN(forward_idx, backward_idx) + 1;
              ctx->skip_ref1 = MPP_MAX(forward_idx, backward_idx) + 1;
              // Frames for skip mode are forward_idx and backward_idx.
          } else {
              RK_S32 second_forward_idx;
              RK_S32 second_forward_hint;
              second_forward_idx = -1;
              for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
                  ref_hint = ctx->ref_s[current->ref_frame_idx[i]].order_hint;
                  if (mpp_av1_get_relative_dist(seq, ref_hint,
                                                forward_hint) < 0) {
                      if (second_forward_idx < 0 ||
                          mpp_av1_get_relative_dist(seq, ref_hint,
                                                    second_forward_hint) > 0) {
                          second_forward_idx  = i;
                          second_forward_hint = ref_hint;
                      }
                  }
              }
  
              if (second_forward_idx < 0) {
                  skip_mode_allowed = 0;
              } else {
                  ctx->skip_ref0 = MPP_MIN(forward_idx, second_forward_idx) + 1;
                  ctx->skip_ref1 = MPP_MAX(forward_idx, second_forward_idx) + 1;
                  skip_mode_allowed = 1;
                  // Frames for skip mode are forward_idx and second_forward_idx.
              }
          }
      }
  
      if (skip_mode_allowed)
          flag(skip_mode_present);
      else
          infer(skip_mode_present, 0);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_global_motion_param(AV1Context *ctx, BitReadCtx_t *gb,
                                            AV1RawFrameHeader *current,
                                            RK_S32 type, RK_S32 ref, RK_S32 idx)
  {
      RK_U32 abs_bits, prec_bits, num_syms;
      RK_S32 err;
      (void)ctx;
      if (idx < 2) {
          if (type == AV1_WARP_MODEL_TRANSLATION) {
              abs_bits  = AV1_GM_ABS_TRANS_ONLY_BITS  - !current->allow_high_precision_mv;
              prec_bits = AV1_GM_TRANS_ONLY_PREC_BITS - !current->allow_high_precision_mv;
          } else {
              abs_bits  = AV1_GM_ABS_TRANS_BITS;
              prec_bits = AV1_GM_TRANS_PREC_BITS;
          }
      } else {
          abs_bits  = AV1_GM_ABS_ALPHA_BITS;
          prec_bits = AV1_GM_ALPHA_PREC_BITS;
      }
  
      num_syms = 2 * (1 << abs_bits) + 1;
      subexp(gm_params[ref][idx], num_syms);// 2, ref, idx);
  
      // Actual gm_params value is not reconstructed here.
      (void)prec_bits;
  
      return 0;
  }
  
  static RK_S32 mpp_av1_global_motion_params(AV1Context *ctx, BitReadCtx_t *gb,
                                             AV1RawFrameHeader *current)
  {
      RK_S32 ref, type;
      RK_S32 err;
  
      if (current->frame_type == AV1_FRAME_KEY ||
          current->frame_type == AV1_FRAME_INTRA_ONLY)
          return 0;
  
      for (ref = AV1_REF_FRAME_LAST; ref <= AV1_REF_FRAME_ALTREF; ref++) {
          flags(is_global[ref], 1, ref);
          if (current->is_global[ref]) {
              flags(is_rot_zoom[ref], 1, ref);
              if (current->is_rot_zoom[ref]) {
                  type = AV1_WARP_MODEL_ROTZOOM;
              } else {
                  flags(is_translation[ref], 1, ref);
                  type = current->is_translation[ref] ? AV1_WARP_MODEL_TRANSLATION
                         : AV1_WARP_MODEL_AFFINE;
              }
          } else {
              type = AV1_WARP_MODEL_IDENTITY;
          }
  
          if (type >= AV1_WARP_MODEL_ROTZOOM) {
              CHECK(mpp_av1_global_motion_param(ctx, gb, current, type, ref, 2));
              CHECK(mpp_av1_global_motion_param(ctx, gb, current, type, ref, 3));
              if (type == AV1_WARP_MODEL_AFFINE) {
                  CHECK(mpp_av1_global_motion_param(ctx, gb, current, type, ref, 4));
                  CHECK(mpp_av1_global_motion_param(ctx, gb, current, type, ref, 5));
              } else {
                  current->gm_params[ref][4] =  -current->gm_params[ref][3];
                  current->gm_params[ref][5] =   current->gm_params[ref][2];
              }
          }
          if (type >= AV1_WARP_MODEL_TRANSLATION) {
              CHECK(mpp_av1_global_motion_param(ctx, gb, current, type, ref, 0));
              CHECK(mpp_av1_global_motion_param(ctx, gb, current, type, ref, 1));
          }
      }
      /* // update alpha..
      if (params->wmtype <= AFFINE) {
          int good_shear_params = get_shear_params(params);
          if (!good_shear_params) return 0;
      }
       */
  
      return 0;
  }
  
  static RK_S32 mpp_av1_film_grain_params(AV1Context *ctx, BitReadCtx_t *gb,
                                          AV1RawFilmGrainParams *current,
                                          AV1RawFrameHeader *frame_header)
  {
      const AV1RawSequenceHeader *seq = ctx->sequence_header;
      RK_S32 num_pos_luma, num_pos_chroma;
      RK_S32 i, err;
  
      if (!seq->film_grain_params_present ||
          (!frame_header->show_frame && !frame_header->showable_frame))
          return 0;
  
      flag(apply_grain);
  
      if (!current->apply_grain)
          return 0;
  
      fb(16, grain_seed);
  
      if (frame_header->frame_type == AV1_FRAME_INTER)
          flag(update_grain);
      else
          infer(update_grain, 1);
  
      if (!current->update_grain) {
          fb(3, film_grain_params_ref_idx);
          return 0;
      }
  
      fc(4, num_y_points, 0, 14);
      for (i = 0; i < current->num_y_points; i++) {
          fcs(8, point_y_value[i],
              i ? current->point_y_value[i - 1] + 1 : 0,
              MAX_UINT_BITS(8) - (current->num_y_points - i - 1),
              1, i);
          fbs(8, point_y_scaling[i], 1, i);
      }
  
      if (seq->color_config.mono_chrome)
          infer(chroma_scaling_from_luma, 0);
      else
          flag(chroma_scaling_from_luma);
  
      if (seq->color_config.mono_chrome ||
          current->chroma_scaling_from_luma ||
          (seq->color_config.subsampling_x == 1 &&
           seq->color_config.subsampling_y == 1 &&
           current->num_y_points == 0)) {
          infer(num_cb_points, 0);
          infer(num_cr_points, 0);
      } else {
          fc(4, num_cb_points, 0, 10);
          for (i = 0; i < current->num_cb_points; i++) {
              fcs(8, point_cb_value[i],
                  i ? current->point_cb_value[i - 1] + 1 : 0,
                  MAX_UINT_BITS(8) - (current->num_cb_points - i - 1),
                  1, i);
              fbs(8, point_cb_scaling[i], 1, i);
          }
          fc(4, num_cr_points, 0, 10);
          for (i = 0; i < current->num_cr_points; i++) {
              fcs(8, point_cr_value[i],
                  i ? current->point_cr_value[i - 1] + 1 : 0,
                  MAX_UINT_BITS(8) - (current->num_cr_points - i - 1),
                  1, i);
              fbs(8, point_cr_scaling[i], 1, i);
          }
      }
  
      fb(2, grain_scaling_minus_8);
      fb(2, ar_coeff_lag);
      num_pos_luma = 2 * current->ar_coeff_lag * (current->ar_coeff_lag + 1);
      if (current->num_y_points) {
          num_pos_chroma = num_pos_luma + 1;
          for (i = 0; i < num_pos_luma; i++)
              fbs(8, ar_coeffs_y_plus_128[i], 1, i);
      } else {
          num_pos_chroma = num_pos_luma;
      }
      if (current->chroma_scaling_from_luma || current->num_cb_points) {
          for (i = 0; i < num_pos_chroma; i++)
              fbs(8, ar_coeffs_cb_plus_128[i], 1, i);
      }
      if (current->chroma_scaling_from_luma || current->num_cr_points) {
          for (i = 0; i < num_pos_chroma; i++)
              fbs(8, ar_coeffs_cr_plus_128[i], 1, i);
      }
      fb(2, ar_coeff_shift_minus_6);
      fb(2, grain_scale_shift);
      if (current->num_cb_points) {
          fb(8, cb_mult);
          fb(8, cb_luma_mult);
          fb(9, cb_offset);
      }
      if (current->num_cr_points) {
          fb(8, cr_mult);
          fb(8, cr_luma_mult);
          fb(9, cr_offset);
      }
  
      flag(overlap_flag);
      flag(clip_to_restricted_range);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_uncompressed_header(AV1Context *ctx, BitReadCtx_t *gb,
                                            AV1RawFrameHeader *current)
  {
      const AV1RawSequenceHeader *seq;
      RK_S32 id_len, diff_len, all_frames, frame_is_intra, order_hint_bits;
      RK_S32 i, err;
  
      RK_S32 start_pos = mpp_get_bits_count(gb);
  
      if (!ctx->sequence_header) {
          mpp_err_f("No sequence header available: "
                    "unable to decode frame header.\n");
          return MPP_ERR_UNKNOW;
      }
      seq = ctx->sequence_header;
  
      id_len = seq->additional_frame_id_length_minus_1 +
               seq->delta_frame_id_length_minus_2 + 3;
      all_frames = (1 << AV1_NUM_REF_FRAMES) - 1;
  
      if (seq->reduced_still_picture_header) {
          infer(show_existing_frame, 0);
          infer(frame_type,     AV1_FRAME_KEY);
          infer(show_frame,     1);
          infer(showable_frame, 0);
          frame_is_intra = 1;
  
      } else {
          flag(show_existing_frame);
  
          if (current->show_existing_frame) {
              AV1ReferenceFrameState *ref;
  
              fb(3, frame_to_show_map_idx);
              ref = &ctx->ref_s[current->frame_to_show_map_idx];
  
              if (!ref->valid) {
                  mpp_err_f("Missing reference frame needed for "
                            "show_existing_frame (frame_to_show_map_idx = %d).\n",
                            current->frame_to_show_map_idx);
                  return MPP_ERR_UNKNOW;
              }
  
              if (seq->decoder_model_info_present_flag &&
                  !seq->timing_info.equal_picture_interval) {
                  fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
                     frame_presentation_time);
              }
  
              if (seq->frame_id_numbers_present_flag)
                  fb(id_len, display_frame_id);
  
              infer(frame_type, ref->frame_type);
              if (current->frame_type == AV1_FRAME_KEY) {
                  infer(refresh_frame_flags, all_frames);
  
                  // Section 7.21
                  infer(current_frame_id, ref->frame_id);
                  ctx->upscaled_width  = ref->upscaled_width;
                  ctx->frame_width     = ref->frame_width;
                  ctx->frame_height    = ref->frame_height;
                  ctx->render_width    = ref->render_width;
                  ctx->render_height   = ref->render_height;
                  ctx->bit_depth       = ref->bit_depth;
                  ctx->order_hint      = ref->order_hint;
              } else
                  infer(refresh_frame_flags, 0);
  
              infer(frame_width_minus_1,   ref->upscaled_width - 1);
              infer(frame_height_minus_1,  ref->frame_height - 1);
              infer(render_width_minus_1,  ref->render_width - 1);
              infer(render_height_minus_1, ref->render_height - 1);
  
              // Section 7.20
              goto update_refs;
          }
  
          fb(2, frame_type);
          frame_is_intra = (current->frame_type == AV1_FRAME_INTRA_ONLY ||
                            current->frame_type == AV1_FRAME_KEY);
  
          ctx->frame_is_intra = frame_is_intra;
          if (current->frame_type == AV1_FRAME_KEY) {
              RK_U32 refresh_frame_flags = (1 << NUM_REF_FRAMES) - 1;
  
              Av1GetCDFs(ctx, current->frame_to_show_map_idx);
              Av1StoreCDFs(ctx, refresh_frame_flags);
          }
  
          flag(show_frame);
          if (current->show_frame &&
              seq->decoder_model_info_present_flag &&
              !seq->timing_info.equal_picture_interval) {
              fb(seq->decoder_model_info.frame_presentation_time_length_minus_1 + 1,
                 frame_presentation_time);
          }
          if (current->show_frame)
              infer(showable_frame, current->frame_type != AV1_FRAME_KEY);
          else
              flag(showable_frame);
  
          if (current->frame_type == AV1_FRAME_SWITCH ||
              (current->frame_type == AV1_FRAME_KEY && current->show_frame))
              infer(error_resilient_mode, 1);
          else
              flag(error_resilient_mode);
      }
  
      if (current->frame_type == AV1_FRAME_KEY && current->show_frame) {
          for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
              ctx->ref_s[i].valid = 0;
              ctx->ref_s[i].order_hint = 0;
          }
      }
  
      flag(disable_cdf_update);
  
      if (seq->seq_force_screen_content_tools ==
          AV1_SELECT_SCREEN_CONTENT_TOOLS) {
          flag(allow_screen_content_tools);
      } else {
          infer(allow_screen_content_tools,
                seq->seq_force_screen_content_tools);
      }
      if (current->allow_screen_content_tools) {
          if (seq->seq_force_integer_mv == AV1_SELECT_INTEGER_MV)
              flag(force_integer_mv);
          else
              infer(force_integer_mv, seq->seq_force_integer_mv);
      } else {
          infer(force_integer_mv, 0);
      }
  
      if (seq->frame_id_numbers_present_flag) {
          fb(id_len, current_frame_id);
  
          diff_len = seq->delta_frame_id_length_minus_2 + 2;
          for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
              if (current->current_frame_id > (RK_S32)(1 << diff_len)) {
                  if (ctx->ref_s[i].frame_id > current->current_frame_id ||
                      ctx->ref_s[i].frame_id < (current->current_frame_id -
                                                (RK_S32)(1 << diff_len)))
                      ctx->ref_s[i].valid = 0;
              } else {
                  if (ctx->ref_s[i].frame_id > current->current_frame_id &&
                      ctx->ref_s[i].frame_id < ((RK_S32)(1 << id_len) +
                                                current->current_frame_id -
                                                (RK_S32)(1 << diff_len)))
                      ctx->ref_s[i].valid = 0;
              }
          }
      } else {
          infer(current_frame_id, 0);
      }
  
      if (current->frame_type == AV1_FRAME_SWITCH)
          infer(frame_size_override_flag, 1);
      else if (seq->reduced_still_picture_header)
          infer(frame_size_override_flag, 0);
      else
          flag(frame_size_override_flag);
  
      order_hint_bits =
          seq->enable_order_hint ? seq->order_hint_bits_minus_1 + 1 : 0;
      if (order_hint_bits > 0)
          fb(order_hint_bits, order_hint);
      else
          infer(order_hint, 0);
      ctx->order_hint = current->order_hint;
  
      if (frame_is_intra || current->error_resilient_mode)
          infer(primary_ref_frame, AV1_PRIMARY_REF_NONE);
      else
          fb(3, primary_ref_frame);
  
      if (seq->decoder_model_info_present_flag) {
          flag(buffer_removal_time_present_flag);
          if (current->buffer_removal_time_present_flag) {
              for (i = 0; i <= seq->operating_points_cnt_minus_1; i++) {
                  if (seq->decoder_model_present_for_this_op[i]) {
                      RK_S32 op_pt_idc = seq->operating_point_idc[i];
                      RK_S32 in_temporal_layer = (op_pt_idc >>  ctx->temporal_id    ) & 1;
                      RK_S32 in_spatial_layer  = (op_pt_idc >> (ctx->spatial_id + 8)) & 1;
                      if (seq->operating_point_idc[i] == 0 ||
                          (in_temporal_layer && in_spatial_layer)) {
                          fbs(seq->decoder_model_info.buffer_removal_time_length_minus_1 + 1,
                              buffer_removal_time[i], 1, i);
                      }
                  }
              }
          }
      }
  
      if (current->frame_type == AV1_FRAME_SWITCH ||
          (current->frame_type == AV1_FRAME_KEY && current->show_frame))
          infer(refresh_frame_flags, all_frames);
      else
          fb(8, refresh_frame_flags);
  
      ctx->refresh_frame_flags = current->refresh_frame_flags;
      if (!frame_is_intra || current->refresh_frame_flags != all_frames) {
          if (seq->enable_order_hint) {
              for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
                  if (current->error_resilient_mode)
                      fbs(order_hint_bits, ref_order_hint[i], 1, i);
                  else
                      infer(ref_order_hint[i], ctx->ref_s[i].order_hint);
                  if (current->ref_order_hint[i] != ctx->ref_s[i].order_hint)
                      ctx->ref_s[i].valid = 0;
              }
          }
      }
  
      if (current->frame_type == AV1_FRAME_KEY ||
          current->frame_type == AV1_FRAME_INTRA_ONLY) {
          CHECK(mpp_av1_frame_size(ctx, gb, current));
          CHECK(mpp_av1_render_size(ctx, gb, current));
  
          if (current->allow_screen_content_tools &&
              ctx->upscaled_width == ctx->frame_width)
              flag(allow_intrabc);
          else
              infer(allow_intrabc, 0);
  
      } else {
          if (!seq->enable_order_hint) {
              infer(frame_refs_short_signaling, 0);
          } else {
              flag(frame_refs_short_signaling);
              if (current->frame_refs_short_signaling) {
                  fb(3, last_frame_idx);
                  fb(3, golden_frame_idx);
                  CHECK(mpp_av1_set_frame_refs(ctx, gb, current));
              }
          }
  
          for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
              if (!current->frame_refs_short_signaling)
                  fbs(3, ref_frame_idx[i], 1, i);
              if (seq->frame_id_numbers_present_flag) {
                  fbs(seq->delta_frame_id_length_minus_2 + 2,
                      delta_frame_id_minus1[i], 1, i);
              }
          }
  
          if (current->frame_size_override_flag &&
              !current->error_resilient_mode) {
              CHECK(mpp_av1_frame_size_with_refs(ctx, gb, current));
          } else {
              CHECK(mpp_av1_frame_size(ctx, gb, current));
              CHECK(mpp_av1_render_size(ctx, gb, current));
          }
  
          if (current->force_integer_mv)
              infer(allow_high_precision_mv, 0);
          else
              flag(allow_high_precision_mv);
  
          CHECK(mpp_av1_interpolation_filter(ctx, gb, current));
  
          flag(is_motion_mode_switchable);
  
          if (current->error_resilient_mode ||
              !seq->enable_ref_frame_mvs)
              infer(use_ref_frame_mvs, 0);
          else
              flag(use_ref_frame_mvs);
  
          infer(allow_intrabc, 0);
      }
  
      if (!frame_is_intra) {
          // Derive reference frame sign biases.
      }
  
      if (seq->reduced_still_picture_header || current->disable_cdf_update)
          infer(disable_frame_end_update_cdf, 1);
      else
          flag(disable_frame_end_update_cdf);
  
      ctx->disable_frame_end_update_cdf = current->disable_frame_end_update_cdf;
  
      if (current->use_ref_frame_mvs) {
          // Perform motion field estimation process.
      }
      av1d_dbg(AV1D_DBG_HEADER, "ptile_info in %d", mpp_get_bits_count(gb));
      CHECK(mpp_av1_tile_info(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "ptile_info out %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_quantization_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "quantization out %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_segmentation_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "segmentation out %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_delta_q_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "delta_q out %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_delta_lf_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "lf out %d", mpp_get_bits_count(gb));
  
      // Init coeff CDFs / load previous segments.
      if (current->error_resilient_mode || frame_is_intra || current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
          // Init non-coeff CDFs.
          // Setup past independence.
          ctx->cdfs = &ctx->default_cdfs;
          ctx->cdfs_ndvc = &ctx->default_cdfs_ndvc;
          Av1DefaultCoeffProbs(current->base_q_idx, ctx->cdfs);
      } else {
          // Load CDF tables from previous frame.
          // Load params from previous frame.
          RK_U32 idx = current->ref_frame_idx[current->primary_ref_frame];
  
          Av1GetCDFs(ctx, idx);
      }
      av1d_dbg(AV1D_DBG_HEADER, "show_existing_frame_index %d primary_ref_frame %d %d (%d) refresh_frame_flags %d base_q_idx %d\n",
               current->frame_to_show_map_idx,
               current->ref_frame_idx[current->primary_ref_frame],
               ctx->ref[current->ref_frame_idx[current->primary_ref_frame]].slot_index,
               current->primary_ref_frame,
               current->refresh_frame_flags,
               current->base_q_idx);
      Av1StoreCDFs(ctx, current->refresh_frame_flags);
  
      ctx->coded_lossless = 1;
      for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
          RK_S32 qindex;
          if (current->feature_enabled[i][AV1_SEG_LVL_ALT_Q]) {
              qindex = (current->base_q_idx +
                        current->feature_value[i][AV1_SEG_LVL_ALT_Q]);
          } else {
              qindex = current->base_q_idx;
          }
          qindex = mpp_clip_uintp2(qindex, 8);
  
          if (qindex                || current->delta_q_y_dc ||
              current->delta_q_u_ac || current->delta_q_u_dc ||
              current->delta_q_v_ac || current->delta_q_v_dc) {
              ctx->coded_lossless = 0;
          }
      }
      ctx->all_lossless = ctx->coded_lossless &&
                          ctx->frame_width == ctx->upscaled_width;
      av1d_dbg(AV1D_DBG_HEADER, "filter in %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_loop_filter_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "cdef in %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_cdef_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "lr in %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_lr_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "read_tx in %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_read_tx_mode(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "reference in%d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_frame_reference_mode(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "kip_mode in %d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_skip_mode_params(ctx, gb, current));
  
      if (frame_is_intra || current->error_resilient_mode ||
          !seq->enable_warped_motion)
          infer(allow_warped_motion, 0);
      else
          flag(allow_warped_motion);
  
      flag(reduced_tx_set);
      av1d_dbg(AV1D_DBG_HEADER, "motion in%d", mpp_get_bits_count(gb));
  
      CHECK(mpp_av1_global_motion_params(ctx, gb, current));
      av1d_dbg(AV1D_DBG_HEADER, "grain in %d", mpp_get_bits_count(gb));
      CHECK(mpp_av1_film_grain_params(ctx, gb, &current->film_grain, current));
      av1d_dbg(AV1D_DBG_HEADER, "film_grain out %d", mpp_get_bits_count(gb));
      ctx->frame_tag_size = ((mpp_get_bits_count(gb) - start_pos) + 7) / 8;
  
  
      av1d_dbg(AV1D_DBG_REF, "Frame %d:  size %dx%d  "
               "upscaled %d  render %dx%d  subsample %dx%d  "
               "bitdepth %d  tiles %dx%d.\n", ctx->order_hint,
               ctx->frame_width, ctx->frame_height, ctx->upscaled_width,
               ctx->render_width, ctx->render_height,
               seq->color_config.subsampling_x + 1,
               seq->color_config.subsampling_y + 1, ctx->bit_depth,
               ctx->tile_rows, ctx->tile_cols);
  
  update_refs:
      for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
          if (current->refresh_frame_flags & (1 << i)) {
              ctx->ref_s[i] = (AV1ReferenceFrameState) {
                  .valid          = 1,
                   .frame_id       = current->current_frame_id,
                    .upscaled_width = ctx->upscaled_width,
                     .frame_width    = ctx->frame_width,
                      .frame_height   = ctx->frame_height,
                       .render_width   = ctx->render_width,
                        .render_height  = ctx->render_height,
                         .frame_type     = current->frame_type,
                          .subsampling_x  = seq->color_config.subsampling_x,
                           .subsampling_y  = seq->color_config.subsampling_y,
                            .bit_depth      = ctx->bit_depth,
                             .order_hint     = ctx->order_hint,
              };
              memcpy(ctx->ref_s[i].loop_filter_ref_deltas, current->loop_filter_ref_deltas,
                     sizeof(current->loop_filter_ref_deltas));
              memcpy(ctx->ref_s[i].loop_filter_mode_deltas, current->loop_filter_mode_deltas,
                     sizeof(current->loop_filter_mode_deltas));
              memcpy(ctx->ref_s[i].feature_enabled, current->feature_enabled,
                     sizeof(current->feature_enabled));
              memcpy(ctx->ref_s[i].feature_value, current->feature_value,
                     sizeof(current->feature_value));
          }
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_frame_header_obu(AV1Context *ctx, BitReadCtx_t *gb,
                                         AV1RawFrameHeader *current, RK_S32 redundant,
                                         void *rw_buffer_ref)
  {
      RK_S32 start_pos, fh_bits, fh_bytes, err;
      RK_U8 *fh_start;
      (void)rw_buffer_ref;
      if (ctx->seen_frame_header) {
          if (!redundant) {
              mpp_err_f("Invalid repeated "
                        "frame header OBU.\n");
              return MPP_ERR_UNKNOW;
          } else {
              BitReadCtx_t fh;
              size_t i, b;
              RK_U32 val;
  
  //            mpp_assert(ctx->frame_header_ref && ctx->frame_header);
  
              mpp_set_bitread_ctx(&fh, ctx->frame_header,
                                  ctx->frame_header_size);
  
              for (i = 0; i < ctx->frame_header_size; i += 8) {
                  b = MPP_MIN(ctx->frame_header_size - i, 8);
                  mpp_read_bits(&fh, b, (RK_S32*)&val);
                  xf(b, frame_header_copy[i],
                     val, val, val, 1, i / 8);
              }
          }
      } else {
  
          start_pos = mpp_get_bits_count(gb);
  
          CHECK(mpp_av1_uncompressed_header(ctx, gb, current));
  
          ctx->tile_num = 0;
  
          if (current->show_existing_frame) {
              ctx->seen_frame_header = 0;
          } else {
              ctx->seen_frame_header = 1;
  
              fh_bits  = mpp_get_bits_count(gb) - start_pos;
              fh_start = (RK_U8*)gb->buf + start_pos / 8;
  
              fh_bytes = (fh_bits + 7) / 8;
  
              ctx->frame_header_size = fh_bits;
              MPP_FREE(ctx->frame_header);
  
              ctx->frame_header =
                  mpp_malloc(RK_U8, fh_bytes + BUFFER_PADDING_SIZE);
              if (!ctx->frame_header)
                  return MPP_ERR_NOMEM;
              memcpy(ctx->frame_header, fh_start, fh_bytes);
          }
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_tile_group_obu(AV1Context *ctx, BitReadCtx_t *gb,
                                       AV1RawTileGroup *current)
  {
      RK_S32 num_tiles, tile_bits;
      RK_S32 err;
      RK_S32 cur_pos = mpp_get_bits_count(gb);
  
      num_tiles = ctx->tile_cols * ctx->tile_rows;
      if (num_tiles > 1)
          flag(tile_start_and_end_present_flag);
      else
          infer(tile_start_and_end_present_flag, 0);
  
      if (num_tiles == 1 || !current->tile_start_and_end_present_flag) {
          infer(tg_start, 0);
          infer(tg_end, num_tiles - 1);
      } else {
          tile_bits = mpp_av1_tile_log2(1, ctx->tile_cols) +
                      mpp_av1_tile_log2(1, ctx->tile_rows);
          fc(tile_bits, tg_start, ctx->tile_num, num_tiles - 1);
          fc(tile_bits, tg_end, current->tg_start, num_tiles - 1);
      }
  
      ctx->tile_num = current->tg_end + 1;
  
      CHECK(mpp_av1_byte_alignment(ctx, gb));
  
      // Reset header for next frame.
      if (current->tg_end == num_tiles - 1)
          ctx->seen_frame_header = 0;
  
      ctx->frame_tag_size += MPP_ALIGN(mpp_get_bits_count(gb) - cur_pos, 8) / 8;
  
      // Tile data follows.
  
      return 0;
  }
  
  static RK_S32 mpp_av1_frame_obu(AV1Context *ctx, BitReadCtx_t *gb,
                                  AV1RawFrame *current,
                                  void *rw_buffer_ref)
  {
      RK_S32 err;
  
      CHECK(mpp_av1_frame_header_obu(ctx, gb, &current->header,
                                     0, rw_buffer_ref));
  
      CHECK(mpp_av1_byte_alignment(ctx, gb));
  
      CHECK(mpp_av1_tile_group_obu(ctx, gb, &current->tile_group));
  
      return 0;
  }
  
  static RK_S32 mpp_av1_tile_list_obu(AV1Context *ctx, BitReadCtx_t *gb,
                                      AV1RawTileList *current)
  {
      RK_S32 err;
      (void)ctx;
      fb(8, output_frame_width_in_tiles_minus_1);
      fb(8, output_frame_height_in_tiles_minus_1);
  
      fb(16, tile_count_minus_1);
  
      // Tile data follows.
  
      return 0;
  }
  
  static RK_S32 mpp_av1_metadata_hdr_cll(AV1Context *ctx, BitReadCtx_t *gb,
                                         AV1RawMetadataHDRCLL *current)
  {
      RK_S32 err;
      (void)ctx;
      fb(16, max_cll);
      fb(16, max_fall);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_metadata_hdr_mdcv(AV1Context *ctx, BitReadCtx_t *gb,
                                          AV1RawMetadataHDRMDCV *current)
  {
      RK_S32 err, i;
      (void)ctx;
      for (i = 0; i < 3; i++) {
          fbs(16, primary_chromaticity_x[i], 1, i);
          fbs(16, primary_chromaticity_y[i], 1, i);
      }
  
      fb(16, white_point_chromaticity_x);
      fb(16, white_point_chromaticity_y);
  
      fc(32, luminance_max, 1, MAX_UINT_BITS(32));
      // luminance_min must be lower than luminance_max. Convert luminance_max from
      // 24.8 fixed point to 18.14 fixed point in order to compare them.
      fc(32, luminance_min, 0, MPP_MIN(((RK_U64)current->luminance_max << 6) - 1,
                                       MAX_UINT_BITS(32)));
  
      return 0;
  }
  
  static RK_S32 mpp_av1_scalability_structure(AV1Context *ctx, BitReadCtx_t *gb,
                                              AV1RawMetadataScalability *current)
  {
      const AV1RawSequenceHeader *seq;
      RK_S32 err, i, j;
  
      if (!ctx->sequence_header) {
          mpp_err_f("No sequence header available: "
                    "unable to parse scalability metadata.\n");
          return MPP_ERR_UNKNOW;
      }
      seq = ctx->sequence_header;
  
      fb(2, spatial_layers_cnt_minus_1);
      flag(spatial_layer_dimensions_present_flag);
      flag(spatial_layer_description_present_flag);
      flag(temporal_group_description_present_flag);
      fc(3, scalability_structure_reserved_3bits, 0, 0);
      if (current->spatial_layer_dimensions_present_flag) {
          for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++) {
              fcs(16, spatial_layer_max_width[i],
                  0, seq->max_frame_width_minus_1 + 1, 1, i);
              fcs(16, spatial_layer_max_height[i],
                  0, seq->max_frame_height_minus_1 + 1, 1, i);
          }
      }
      if (current->spatial_layer_description_present_flag) {
          for (i = 0; i <= current->spatial_layers_cnt_minus_1; i++)
              fbs(8, spatial_layer_ref_id[i], 1, i);
      }
      if (current->temporal_group_description_present_flag) {
          fb(8, temporal_group_size);
          for (i = 0; i < current->temporal_group_size; i++) {
              fbs(3, temporal_group_temporal_id[i], 1, i);
              flags(temporal_group_temporal_switching_up_point_flag[i], 1, i);
              flags(temporal_group_spatial_switching_up_point_flag[i], 1, i);
              fbs(3, temporal_group_ref_cnt[i], 1, i);
              for (j = 0; j < current->temporal_group_ref_cnt[i]; j++) {
                  fbs(8, temporal_group_ref_pic_diff[i][j], 2, i, j);
              }
          }
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_metadata_scalability(AV1Context *ctx, BitReadCtx_t *gb,
                                             AV1RawMetadataScalability *current)
  {
      RK_S32 err;
  
      fb(8, scalability_mode_idc);
  
      if (current->scalability_mode_idc == AV1_SCALABILITY_SS)
          CHECK(mpp_av1_scalability_structure(ctx, gb, current));
  
      return 0;
  }
  
  static RK_S32 mpp_av1_metadata_itut_t35(AV1Context *ctx, BitReadCtx_t *gb,
                                          AV1RawMetadataITUTT35 *current)
  {
      RK_S32 err;
      size_t i;
      (void)ctx;
  
      fb(8, itu_t_t35_country_code);
      if (current->itu_t_t35_country_code == 0xff)
          fb(8, itu_t_t35_country_code_extension_byte);
  
      current->payload_size = mpp_av1_get_payload_bytes_left(gb);
  
      current->payload = mpp_malloc(RK_U8, current->payload_size);
      if (!current->payload)
          return MPP_ERR_NOMEM;
  
      for (i = 0; i < current->payload_size; i++)
          xf(8, itu_t_t35_payload_bytes[i], current->payload[i],
             0x00, 0xff, 1, i);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_metadata_timecode(AV1Context *ctx, BitReadCtx_t *gb,
                                          AV1RawMetadataTimecode *current)
  {
      RK_S32 err;
      (void)ctx;
  
      fb(5, counting_type);
      flag(full_timestamp_flag);
      flag(discontinuity_flag);
      flag(cnt_dropped_flag);
      fb(9, n_frames);
  
      if (current->full_timestamp_flag) {
          fc(6, seconds_value, 0, 59);
          fc(6, minutes_value, 0, 59);
          fc(5, hours_value,   0, 23);
      } else {
          flag(seconds_flag);
          if (current->seconds_flag) {
              fc(6, seconds_value, 0, 59);
              flag(minutes_flag);
              if (current->minutes_flag) {
                  fc(6, minutes_value, 0, 59);
                  flag(hours_flag);
                  if (current->hours_flag)
                      fc(5, hours_value, 0, 23);
              }
          }
      }
  
      fb(5, time_offset_length);
      if (current->time_offset_length > 0)
          fb(current->time_offset_length, time_offset_value);
      else
          infer(time_offset_length, 0);
  
      return 0;
  }
  
  static RK_S32 mpp_av1_metadata_obu(AV1Context *ctx, BitReadCtx_t *gb,
                                     AV1RawMetadata *current)
  {
      RK_S32 err;
  
      leb128(metadata_type);
  
      switch (current->metadata_type) {
      case AV1_METADATA_TYPE_HDR_CLL:
          CHECK(mpp_av1_metadata_hdr_cll(ctx, gb, &current->metadata.hdr_cll));
          break;
      case AV1_METADATA_TYPE_HDR_MDCV:
          CHECK(mpp_av1_metadata_hdr_mdcv(ctx, gb, &current->metadata.hdr_mdcv));
          break;
      case AV1_METADATA_TYPE_SCALABILITY:
          CHECK(mpp_av1_metadata_scalability(ctx, gb, &current->metadata.scalability));
          break;
      case AV1_METADATA_TYPE_ITUT_T35:
          CHECK(mpp_av1_metadata_itut_t35(ctx, gb, &current->metadata.itut_t35));
          break;
      case AV1_METADATA_TYPE_TIMECODE:
          CHECK(mpp_av1_metadata_timecode(ctx, gb, &current->metadata.timecode));
          break;
      default:
          // Unknown metadata type.
          return MPP_ERR_UNKNOW;
      }
  
      return 0;
  }
  
  static RK_S32 mpp_av1_padding_obu(AV1Context *ctx, BitReadCtx_t *gb,
                                    AV1RawPadding *current)
  {
      RK_S32 err;
      RK_U32 i;
      (void)ctx;
      current->payload_size = mpp_av1_get_payload_bytes_left(gb);
  
      current->payload  = mpp_malloc(RK_U8, current->payload_size);
      if (!current->payload )
          return MPP_ERR_NOMEM;
  
      for (i = 0; i < current->payload_size; i++)
          xf(8, obu_padding_byte[i], current->payload[i], 0x00, 0xff, 1, i);
  
      return 0;
  }
  
  
  
  static MPP_RET mpp_insert_unit(Av1UnitFragment *frag, RK_S32 position)
  {
      Av1ObuUnit *units;
  
      if (frag->nb_units < frag->nb_units_allocated) {
          units = frag->units;
  
          if (position < frag->nb_units)
              memmove(units + position + 1, units + position,
                      (frag->nb_units - position) * sizeof(*units));
      } else {
          units = mpp_malloc(Av1ObuUnit, frag->nb_units * 2 + 1);
          if (!units)
              return MPP_ERR_NOMEM;
  
          frag->nb_units_allocated = 2 * frag->nb_units_allocated + 1;
  
          if (position > 0)
              memcpy(units, frag->units, position * sizeof(*units));
  
          if (position < frag->nb_units)
              memcpy(units + position + 1, frag->units + position,
                     (frag->nb_units - position) * sizeof(*units));
      }
  
      memset(units + position, 0, sizeof(*units));
  
      if (units != frag->units) {
          mpp_free(frag->units);
          frag->units = units;
      }
  
      ++frag->nb_units;
  
      return MPP_OK;
  }
  
  static MPP_RET mpp_insert_unit_data(Av1UnitFragment *frag,
                                      RK_S32 position,
                                      Av1UnitType type,
                                      RK_U8 *data, size_t data_size)
  {
      Av1ObuUnit *unit;
      MPP_RET ret;
  
      if (position == -1)
          position = frag->nb_units;
  
      mpp_assert(position >= 0 && position <= frag->nb_units);
      ret = mpp_insert_unit(frag, position);
      if (ret < 0) {
          return ret;
      }
  
      unit = &frag->units[position];
      unit->type      = type;
      unit->data      = data;
      unit->data_size = data_size;
  
      return MPP_OK;
  }
  
  RK_S32 mpp_av1_split_fragment(AV1Context *ctx, Av1UnitFragment *frag, RK_S32 header_flag)
  {
      BitReadCtx_t gbc;
      RK_U8 *data;
      size_t size;
      RK_U64 obu_length;
      RK_S32 pos, err;
  
      data = frag->data;
      size = frag->data_size;
  
      if (INT_MAX / 8 < size) {
          mpp_err( "Invalid fragment: "
                   "too large (%d bytes).\n", size);
          err = MPP_NOK;
          goto fail;
      }
  
      if (header_flag && size && data[0] & 0x80) {
          // first bit is nonzero, the extradata does not consist purely of
          // OBUs. Expect MP4/Matroska AV1CodecConfigurationRecord
          RK_S32 config_record_version = data[0] & 0x7f;
  
          if (config_record_version != 1) {
              mpp_err(
                  "Unknown version %d of AV1CodecConfigurationRecord "
                  "found!\n",
                  config_record_version);
              err = MPP_NOK;
              goto fail;
          }
  
          if (size <= 4) {
              if (size < 4) {
                  av1d_dbg(AV1D_DBG_STRMIN,
                           "Undersized AV1CodecConfigurationRecord v%d found!\n",
                           config_record_version);
                  err = MPP_NOK;
                  goto fail;
              }
  
              goto success;
          }
  
          // In AV1CodecConfigurationRecord v1, actual OBUs start after
          // four bytes. Thus set the offset as required for properly
          // parsing them.
          data += 4;
          size -= 4;
      }
  
      while (size > 0) {
          AV1RawOBUHeader header;
          RK_U64 obu_size = 0;
  
          mpp_set_bitread_ctx(&gbc, data, size);
  
          err = mpp_av1_read_obu_header(ctx, &gbc, &header);
          if (err < 0)
              goto fail;
  
          if (header.obu_has_size_field) {
              if (mpp_get_bits_left(&gbc) < 8) {
                  mpp_err( "Invalid OBU: fragment "
                           "too short (%d bytes).\n", size);
                  err = MPP_NOK;
                  goto fail;
              }
              err = mpp_av1_read_leb128(&gbc, &obu_size);
              if (err < 0)
                  goto fail;
          } else
              obu_size = size - 1 - header.obu_extension_flag;
  
          pos = mpp_get_bits_count(&gbc);
  
          mpp_assert(pos % 8 == 0 && pos / 8 <= (RK_S32)size);
  
          obu_length = pos / 8 + obu_size;
  
          if (size < obu_length) {
              mpp_err( "Invalid OBU length: "
                       "%lld, but only %d bytes remaining in fragment.\n",
                       obu_length, size);
              err = MPP_NOK;
              goto fail;
          }
          err = mpp_insert_unit_data(frag, -1, header.obu_type,
                                     data, obu_length);
          if (err < 0)
              goto fail;
  
          data += obu_length;
          size -= obu_length;
      }
  
  success:
      err = 0;
  fail:
      return err;
  }
  
  static RK_S32 mpp_av1_ref_tile_data(Av1ObuUnit *unit,
                                      BitReadCtx_t *gbc,
                                      AV1RawTileData *td)
  {
      RK_S32 pos;
  
      pos = mpp_get_bits_count(gbc);
      if (pos >= (RK_S32)(8 * unit->data_size)) {
          mpp_err( "Bitstream ended before "
                   "any data in tile group (%d bits read).\n", pos);
          return MPP_NOK;
      }
      // Must be byte-aligned at this point.
      mpp_assert(pos % 8 == 0);
  
  
  
      td->data      = unit->data      + pos / 8;
      td->data_size = unit->data_size - pos / 8;
  
      return 0;
  }
  
  static MPP_RET mpp_av1_alloc_unit_content(Av1ObuUnit *unit)
  {
      (void)unit;
      MPP_FREE(unit->content);
      unit->content = mpp_calloc(AV1RawOBU, 1);
      if (!unit->content) {
          return MPP_ERR_NOMEM; // drop_obu()
      }
      return MPP_OK;
  }
  
  MPP_RET mpp_av1_read_unit(AV1Context *ctx, Av1ObuUnit *unit)
  {
      AV1RawOBU *obu;
      BitReadCtx_t gbc;
      RK_S32 err = 0, start_pos, end_pos, hdr_start_pos;
  
      err = mpp_av1_alloc_unit_content(unit);
  
      if (err < 0)
          return err;
  
      obu = unit->content;
  
      mpp_set_bitread_ctx(&gbc, unit->data, unit->data_size);
  
      hdr_start_pos = mpp_get_bits_count(&gbc);
  
      err = mpp_av1_read_obu_header(ctx, &gbc, &obu->header);
      if (err < 0)
          return err;
      mpp_assert(obu->header.obu_type == unit->type);
  
      if (obu->header.obu_has_size_field) {
          RK_U64 obu_size = 0;
          err = mpp_av1_read_leb128(&gbc, &obu_size);
          if (err < 0)
              return err;
          obu->obu_size = obu_size;
      } else {
          if (unit->data_size < (RK_U32)(1 + obu->header.obu_extension_flag)) {
              mpp_err( "Invalid OBU length: "
                       "unit too short (%d).\n", unit->data_size);
              return MPP_NOK;
          }
          obu->obu_size = unit->data_size - 1 - obu->header.obu_extension_flag;
      }
  
      start_pos = mpp_get_bits_count(&gbc);
      ctx->obu_len += ((start_pos - hdr_start_pos) >> 3);
      if (obu->header.obu_extension_flag) {
          if (obu->header.obu_type != AV1_OBU_SEQUENCE_HEADER &&
              obu->header.obu_type != AV1_OBU_TEMPORAL_DELIMITER &&
              ctx->operating_point_idc) {
              RK_S32 in_temporal_layer =
                  (ctx->operating_point_idc >>  ctx->temporal_id    ) & 1;
              RK_S32 in_spatial_layer  =
                  (ctx->operating_point_idc >> (ctx->spatial_id + 8)) & 1;
              if (!in_temporal_layer || !in_spatial_layer) {
                  return MPP_ERR_PROTOL; // drop_obu()
              }
          }
      }
  
      switch (obu->header.obu_type) {
      case AV1_OBU_SEQUENCE_HEADER: {
          err = mpp_av1_sequence_header_obu(ctx, &gbc,
                                            &obu->obu.sequence_header);
          if (err < 0)
              return err;
  
          if (ctx->operating_point >= 0) {
              AV1RawSequenceHeader *sequence_header = &obu->obu.sequence_header;
  
              if (ctx->operating_point > sequence_header->operating_points_cnt_minus_1) {
                  mpp_err("Invalid Operating Point %d requested. "
                          "Must not be higher than %u.\n",
                          ctx->operating_point, sequence_header->operating_points_cnt_minus_1);
                  return MPP_ERR_PROTOL;
              }
              ctx->operating_point_idc = sequence_header->operating_point_idc[ctx->operating_point];
          }
  
          ctx->sequence_header = NULL;
          ctx->sequence_header = &obu->obu.sequence_header;
      } break;
      case AV1_OBU_TEMPORAL_DELIMITER: {
          err = mpp_av1_temporal_delimiter_obu(ctx, &gbc);
          if (err < 0)
              return err;
      } break;
      case AV1_OBU_FRAME_HEADER:
      case AV1_OBU_REDUNDANT_FRAME_HEADER: {
          err = mpp_av1_frame_header_obu(ctx, &gbc,
                                         &obu->obu.frame_header,
                                         obu->header.obu_type ==
                                         AV1_OBU_REDUNDANT_FRAME_HEADER,
                                         NULL);
          if (err < 0)
              return err;
      } break;
      case AV1_OBU_TILE_GROUP: {
          err = mpp_av1_tile_group_obu(ctx, &gbc, &obu->obu.tile_group);
          if (err < 0)
              return err;
  
          err = mpp_av1_ref_tile_data(unit, &gbc,
                                      &obu->obu.tile_group.tile_data);
          if (err < 0)
              return err;
      } break;
      case AV1_OBU_FRAME: {
          err = mpp_av1_frame_obu(ctx, &gbc, &obu->obu.frame,
                                  NULL);
          if (err < 0)
              return err;
  
          err = mpp_av1_ref_tile_data(unit, &gbc,
                                      &obu->obu.frame.tile_group.tile_data);
          if (err < 0)
              return err;
      } break;
      case AV1_OBU_TILE_LIST: {
          err = mpp_av1_tile_list_obu(ctx, &gbc, &obu->obu.tile_list);
          if (err < 0)
              return err;
  
          err = mpp_av1_ref_tile_data(unit, &gbc,
                                      &obu->obu.tile_list.tile_data);
          if (err < 0)
              return err;
      } break;
      case AV1_OBU_METADATA: {
          err = mpp_av1_metadata_obu(ctx, &gbc, &obu->obu.metadata);
          if (err < 0)
              return err;
      } break;
      case AV1_OBU_PADDING: {
          err = mpp_av1_padding_obu(ctx, &gbc, &obu->obu.padding);
          if (err < 0)
              return err;
      } break;
      default:
          return MPP_ERR_VALUE;
      }
  
      end_pos = mpp_get_bits_count(&gbc);
      mpp_assert(end_pos <= (RK_S32)(unit->data_size * 8));
  
      if (obu->obu_size > 0 &&
          obu->header.obu_type != AV1_OBU_TILE_GROUP &&
          obu->header.obu_type != AV1_OBU_TILE_LIST &&
          obu->header.obu_type != AV1_OBU_FRAME) {
          RK_S32 nb_bits = obu->obu_size * 8 + start_pos - end_pos;
  
          if (nb_bits <= 0)
              return MPP_NOK;
  
          err = mpp_av1_trailing_bits(ctx, &gbc, nb_bits);
          if (err < 0)
              return err;
      }
  
      return 0;
  }
  
  RK_S32 mpp_av1_read_fragment_content(AV1Context *ctx, Av1UnitFragment *frag)
  {
      int err, i, j;
      ctx->obu_len = 0;
      AV1RawOBU *obu;
      for (i = 0; i < frag->nb_units; i++) {
          Av1ObuUnit *unit = &frag->units[i];
          if (ctx->unit_types) {
              for (j = 0; j < ctx->nb_unit_types; j++) {
                  if (ctx->unit_types[j] == unit->type)
                      break;
              }
              if (j >= ctx->nb_unit_types)
                  continue;
          }
          MPP_FREE(unit->content);
          mpp_assert(unit->data);
          err = mpp_av1_read_unit(ctx, unit);
  
          if (err == MPP_ERR_VALUE) {
              mpp_err_f("Decomposition unimplemented for unit %d "
                        "(type %d).\n", i, unit->type);
          } else if (err == MPP_ERR_PROTOL) {
              mpp_err_f("Skipping decomposition of"
                        "unit %d (type %d).\n", i, unit->type);
              MPP_FREE(unit->content);
              unit->content = NULL;
          } else if (err < 0) {
              mpp_err_f("Failed to read unit %d (type %d).\n", i, unit->type);
              return err;
          }
          obu = unit->content;
          av1d_dbg(AV1D_DBG_HEADER, "obu->header.obu_type %d, obu->obu_size = %d ctx->frame_tag_size %d",
                   obu->header.obu_type, obu->obu_size, ctx->frame_tag_size);
          if ((obu->header.obu_type != AV1_OBU_FRAME) &&
              (obu->header.obu_type != AV1_OBU_TILE_GROUP)) {
              ctx->obu_len +=  obu->obu_size;
          }
      }
      ctx->frame_tag_size += ctx->obu_len;
      return 0;
  }
  
  int mpp_av1_set_context_with_sequence(Av1CodecContext *ctx,
                                        const AV1RawSequenceHeader *seq)
  {
      int width = seq->max_frame_width_minus_1 + 1;
      int height = seq->max_frame_height_minus_1 + 1;
  
      ctx->profile = seq->seq_profile;
      ctx->level = seq->seq_level_idx[0];
  
      ctx->color_range =
          seq->color_config.color_range ? MPP_FRAME_RANGE_JPEG : MPP_FRAME_RANGE_MPEG;
      ctx->color_primaries = seq->color_config.color_primaries;
      ctx->colorspace = seq->color_config.color_primaries;
      ctx->color_trc = seq->color_config.transfer_characteristics;
  
      switch (seq->color_config.chroma_sample_position) {
      case AV1_CSP_VERTICAL:
          ctx->chroma_sample_location = MPP_CHROMA_LOC_LEFT;
          break;
      case AV1_CSP_COLOCATED:
          ctx->chroma_sample_location =  MPP_CHROMA_LOC_TOPLEFT;
          break;
      }
  
      if (ctx->width != width || ctx->height != height) {
          ctx->width = width;
          ctx->height = height;
      }
      return 0;
  }
  
  void mpp_av1_fragment_reset(Av1UnitFragment *frag)
  {
      int i;
  
      for (i = 0; i < frag->nb_units; i++) {
          Av1ObuUnit *unit = &frag->units[i];
          MPP_FREE(unit->content);
          unit->data             = NULL;
          unit->data_size        = 0;
      }
      frag->nb_units         = 0;
      frag->data             = NULL;
      frag->data_size        = 0;
  }
  
  RK_S32 mpp_av1_assemble_fragment(AV1Context *ctx, Av1UnitFragment *frag)
  {
      size_t size, pos;
      RK_S32 i;
      (void)ctx;
      size = 0;
      for (i = 0; i < frag->nb_units; i++)
          size += frag->units[i].data_size;
  
      frag->data = mpp_malloc(RK_U8, size + BUFFER_PADDING_SIZE);
      if (!frag->data)
          return MPP_ERR_NOMEM;
  
      memset(frag->data + size, 0, BUFFER_PADDING_SIZE);
  
      pos = 0;
      for (i = 0; i < frag->nb_units; i++) {
          memcpy(frag->data + pos, frag->units[i].data,
                 frag->units[i].data_size);
          pos += frag->units[i].data_size;
      }
      mpp_assert(pos == size);
      frag->data_size = size;
  
      return 0;
  }
  
  void mpp_av1_flush(AV1Context *ctx)
  {
      //  ctx->sequencframe_headere_header = NULL;
      //  ctx-> = NULL;
  
      memset(ctx->ref_s, 0, sizeof(ctx->ref_s));
      ctx->operating_point_idc = 0;
      ctx->seen_frame_header = 0;
      ctx->tile_num = 0;
  }
  
  void mpp_av1_close(AV1Context *ctx)
  {
      MPP_FREE(ctx->frame_header);
      MPP_FREE(ctx->sequence_header);
      MPP_FREE(ctx->raw_frame_header);
  }
  
  void mpp_av1_free_metadata(void *unit, RK_U8 *content)
  {
      AV1RawOBU *obu = (AV1RawOBU*)content;
      (void)unit;
      mpp_assert(obu->header.obu_type == AV1_OBU_METADATA);
      MPP_FREE(content);
  }
  