/****************************************************************************** * * Copyright (C) 2018 The Android Open Source Project * * 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. * ***************************************************************************** * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore */ /** ******************************************************************************* * @file * ihevce_stasino_helpers.c * * @brief * * @author * Ittiam * * @par List of Functions: * * @remarks * None * ******************************************************************************* */ /*****************************************************************************/ /* File Includes */ /*****************************************************************************/ /* System include files */ #include #include #include #include /* User include files */ #include "ihevc_typedefs.h" #include "itt_video_api.h" #include "ihevce_api.h" #include "rc_cntrl_param.h" #include "rc_frame_info_collector.h" #include "rc_look_ahead_params.h" #include "ihevc_defs.h" #include "ihevc_structs.h" #include "ihevc_platform_macros.h" #include "ihevc_deblk.h" #include "ihevc_itrans_recon.h" #include "ihevc_chroma_itrans_recon.h" #include "ihevc_chroma_intra_pred.h" #include "ihevc_intra_pred.h" #include "ihevc_inter_pred.h" #include "ihevc_mem_fns.h" #include "ihevc_padding.h" #include "ihevc_weighted_pred.h" #include "ihevc_sao.h" #include "ihevc_resi_trans.h" #include "ihevc_quant_iquant_ssd.h" #include "ihevc_cabac_tables.h" #include "ihevce_defs.h" #include "ihevce_lap_enc_structs.h" #include "ihevce_multi_thrd_structs.h" #include "ihevce_me_common_defs.h" #include "ihevce_had_satd.h" #include "ihevce_error_codes.h" #include "ihevce_bitstream.h" #include "ihevce_cabac.h" #include "ihevce_rdoq_macros.h" #include "ihevce_function_selector.h" #include "ihevce_enc_structs.h" #include "ihevce_entropy_structs.h" #include "ihevce_cmn_utils_instr_set_router.h" #include "ihevce_enc_loop_structs.h" #include "ihevce_stasino_helpers.h" /*****************************************************************************/ /* Function Definitions */ /*****************************************************************************/ /** ******************************************************************************* * * @brief * This function calculates the variance of given data set. * * @par Description: * This function is mainly used to find the variance of the block of pixel values. * The block can be rectangular also. Single pass variance calculation * implementation. * * @param[in] p_input * The input buffer to calculate the variance. * * @param[out] pi4_mean * Pointer ot the mean of the datset * * @param[out] pi4_variance * Pointer tot he variabce of the data set * * @param[in] u1_is_hbd * 1 if the data is in high bit depth * * @param[in] stride * Stride for the input buffer * * @param[in] block_height * height of the pixel block * * @param[in] block_width * width of the pixel block * * @remarks * None * ******************************************************************************* */ void ihevce_calc_variance( void *pv_input, WORD32 i4_stride, WORD32 *pi4_mean, UWORD32 *pu4_variance, UWORD8 u1_block_height, UWORD8 u1_block_width, UWORD8 u1_is_hbd, UWORD8 u1_disable_normalization) { UWORD8 *pui1_buffer; // pointer for 8 bit usecase WORD32 i, j; WORD32 total_elements; LWORD64 mean; ULWORD64 variance; ULWORD64 sum; ULWORD64 sq_sum; /* intialisation */ total_elements = u1_block_height * u1_block_width; mean = 0; variance = 0; sum = 0; sq_sum = 0; /* handle the case of 8/10 bit depth separately */ if(!u1_is_hbd) { pui1_buffer = (UWORD8 *)pv_input; /* loop over all the values in the block */ for(i = 0; i < u1_block_height; i++) { /* loop over a row in the block */ for(j = 0; j < u1_block_width; j++) { sum += pui1_buffer[i * i4_stride + j]; sq_sum += (pui1_buffer[i * i4_stride + j] * pui1_buffer[i * i4_stride + j]); } } if(!u1_disable_normalization) { mean = sum / total_elements; variance = ((total_elements * sq_sum) - (sum * sum)) / (total_elements * (total_elements)); } else { mean = sum; variance = ((total_elements * sq_sum) - (sum * sum)); } } /* copy back the values to the output variables */ *pi4_mean = mean; *pu4_variance = variance; } /** ******************************************************************************* * * @brief * This function calcluates the variance of given data set which is WORD16 * * @par Description: * This function is mainly used to find the variance of the block of pixel values. * Single pass variance calculation implementation. * * @param[in] pv_input * The input buffer to calculate the variance. * * * @param[in] stride * Stride for the input buffer * * @param[out] pi4_mean * Pointer ot the mean of the datset * * @param[out] pi4_variance * Pointer tot he variabce of the data set * * @param[in] block_height * height of the pixel block * * @param[in] block_width * width of the pixel block * * * @remarks * None * *******************************************************************************/ void ihevce_calc_variance_signed( WORD16 *pv_input, WORD32 i4_stride, WORD32 *pi4_mean, UWORD32 *pu4_variance, UWORD8 u1_block_height, UWORD8 u1_block_width) { WORD16 *pi2_buffer; // poinbter for 10 bit use case WORD32 i, j; WORD32 total_elements; LWORD64 mean; LWORD64 variance; LWORD64 sum; LWORD64 sq_sum; /* intialisation */ total_elements = u1_block_height * u1_block_width; mean = 0; variance = 0; sum = 0; sq_sum = 0; pi2_buffer = pv_input; for(i = 0; i < u1_block_height; i++) { for(j = 0; j < u1_block_width; j++) { sum += pi2_buffer[i * i4_stride + j]; sq_sum += (pi2_buffer[i * i4_stride + j] * pi2_buffer[i * i4_stride + j]); } } mean = sum; /// total_elements; variance = ((total_elements * sq_sum) - (sum * sum)); // / (total_elements * (total_elements) ) /* copy back the values to the output variables */ *pi4_mean = mean; *pu4_variance = variance; } /** ******************************************************************************* * * @brief * This function calculates the variance of a chrominance plane for 420SP data * * @par Description: * This function is mainly used to find the variance of the block of pixel values. * The block can be rectangular also. Single pass variance calculation * implementation. * * @param[in] p_input * The input buffer to calculate the variance. * * @param[in] stride * Stride for the input buffer * * @param[out] pi4_mean * Pointer ot the mean of the datset * * @param[out] pi4_variance * Pointer tot he variabce of the data set * * @param[in] block_height * height of the pixel block * * @param[in] block_width * width of the pixel block * * @param[in] u1_is_hbd * 1 if the data is in high bit depth * * @param[in] e_chroma_plane * is U or V * * @remarks * None * ******************************************************************************* */ void ihevce_calc_chroma_variance( void *pv_input, WORD32 i4_stride, WORD32 *pi4_mean, UWORD32 *pu4_variance, UWORD8 u1_block_height, UWORD8 u1_block_width, UWORD8 u1_is_hbd, CHROMA_PLANE_ID_T e_chroma_plane) { UWORD8 *pui1_buffer; // pointer for 8 bit usecase WORD32 i, j; WORD32 total_elements; LWORD64 mean; ULWORD64 variance; LWORD64 sum; LWORD64 sq_sum; /* intialisation */ total_elements = u1_block_height * u1_block_width; mean = 0; variance = 0; sum = 0; sq_sum = 0; /* handle the case of 8/10 bit depth separately */ if(!u1_is_hbd) { pui1_buffer = (UWORD8 *)pv_input; pui1_buffer += e_chroma_plane; /* loop over all the values in the block */ for(i = 0; i < u1_block_height; i++) { /* loop over a row in the block */ for(j = 0; j < u1_block_width; j++) { sum += pui1_buffer[i * i4_stride + j * 2]; sq_sum += (pui1_buffer[i * i4_stride + j * 2] * pui1_buffer[i * i4_stride + j * 2]); } } mean = sum / total_elements; variance = ((total_elements * sq_sum) - (sum * sum)) / (total_elements * (total_elements)); } /* copy back the values to the output variables */ *pi4_mean = mean; *pu4_variance = variance; } LWORD64 ihevce_inject_stim_into_distortion( void *pv_src, WORD32 i4_src_stride, void *pv_pred, WORD32 i4_pred_stride, LWORD64 i8_distortion, WORD32 i4_alpha_stim_multiplier, UWORD8 u1_blk_size, UWORD8 u1_is_hbd, UWORD8 u1_enable_psyRDOPT, CHROMA_PLANE_ID_T e_chroma_plane) { if(!u1_enable_psyRDOPT) { UWORD32 u4_src_variance; UWORD32 u4_pred_variance; WORD32 i4_mean; WORD32 i4_noise_term; if(NULL_PLANE == e_chroma_plane) { ihevce_calc_variance( pv_src, i4_src_stride, &i4_mean, &u4_src_variance, u1_blk_size, u1_blk_size, u1_is_hbd, 0); ihevce_calc_variance( pv_pred, i4_pred_stride, &i4_mean, &u4_pred_variance, u1_blk_size, u1_blk_size, u1_is_hbd, 0); } else { ihevce_calc_chroma_variance( pv_src, i4_src_stride, &i4_mean, &u4_src_variance, u1_blk_size, u1_blk_size, u1_is_hbd, e_chroma_plane); ihevce_calc_chroma_variance( pv_pred, i4_pred_stride, &i4_mean, &u4_pred_variance, u1_blk_size, u1_blk_size, u1_is_hbd, e_chroma_plane); } i4_noise_term = ihevce_compute_noise_term(i4_alpha_stim_multiplier, u4_src_variance, u4_pred_variance); MULTIPLY_STIM_WITH_DISTORTION(i8_distortion, i4_noise_term, STIM_Q_FORMAT, ALPHA_Q_FORMAT); return i8_distortion; } else { return i8_distortion; } } UWORD8 ihevce_determine_cu_noise_based_on_8x8Blk_data( UWORD8 *pu1_is_8x8Blk_noisy, UWORD8 u1_cu_x_pos, UWORD8 u1_cu_y_pos, UWORD8 u1_cu_size) { UWORD8 u1_num_noisy_children = 0; UWORD8 u1_start_index = (u1_cu_x_pos / 8) + u1_cu_y_pos; if(8 == u1_cu_size) { return pu1_is_8x8Blk_noisy[u1_start_index]; } u1_num_noisy_children += ihevce_determine_cu_noise_based_on_8x8Blk_data( pu1_is_8x8Blk_noisy, u1_cu_x_pos, u1_cu_y_pos, u1_cu_size / 2); u1_num_noisy_children += ihevce_determine_cu_noise_based_on_8x8Blk_data( pu1_is_8x8Blk_noisy, u1_cu_x_pos + (u1_cu_size / 2), u1_cu_y_pos, u1_cu_size / 2); u1_num_noisy_children += ihevce_determine_cu_noise_based_on_8x8Blk_data( pu1_is_8x8Blk_noisy, u1_cu_x_pos, u1_cu_y_pos + (u1_cu_size / 2), u1_cu_size / 2); u1_num_noisy_children += ihevce_determine_cu_noise_based_on_8x8Blk_data( pu1_is_8x8Blk_noisy, u1_cu_x_pos + (u1_cu_size / 2), u1_cu_y_pos + (u1_cu_size / 2), u1_cu_size / 2); return (u1_num_noisy_children >= 2); } /*! ****************************************************************************** * \if Function name : ihevce_psy_rd_cost_croma \endif * * \brief * Calculates the psyco visual cost for RD opt. This is * * \param[in] pui4_source_satd * This is the pointer to the array of 8x8 satd of the corresponding source CTB. This is pre calculated. * \param[in] *pui1_recon * This si the pointer to the pred data. * \param[in] recon_stride * This si the pred stride * \param[in] pic_type * Picture type. * \param[in] layer_id * Indicates the temporal layer. * \param[in] lambda * This is the weighting factor for the cost. * \param[in] is_hbd * This is the high bit depth flag which indicates if the bit depth of the pixels is 10 bit or 8 bit. * \param[in] sub_sampling_type * This is the chroma subsampling type. 11 - for 420 and 13 for 422 * \return * the cost for the psyRDopt * * \author * Ittiam * ***************************************************************************** */ LWORD64 ihevce_psy_rd_cost_croma( LWORD64 *pui4_source_satd, void *p_recon, WORD32 recon_stride_vert, WORD32 recond_stride_horz, WORD32 cu_size_luma, WORD32 pic_type, WORD32 layer_id, WORD32 lambda, WORD32 start_index, WORD32 is_hbd, WORD32 sub_sampling_type, ihevce_cmn_opt_func_t *ps_cmn_utils_optimised_function_list) { /* declare local variables to store the SATD values for the pred for the current block. */ LWORD64 psy_rd_cost; UWORD32 lambda_mod; WORD32 psy_factor; /* declare local variables */ WORD32 i; WORD32 cu_total_size; WORD32 num_comp_had_blocks; UWORD8 *pu1_l0_block; UWORD8 *pu1_l0_block_prev; UWORD8 *pu1_recon; WORD32 ht_offset; WORD32 wd_offset; WORD32 cu_ht; WORD32 cu_wd; WORD32 num_horz_blocks; WORD16 pi2_residue_had[64]; /* this is used as a buffer with all values equal to 0. This is emulate the case with pred being zero in HAD fucntion */ UWORD8 ai1_zeros_buffer[64]; WORD32 had_block_size; LWORD64 source_satd; // to hold source for current 8x8 block LWORD64 recon_satd; // holds the current recon 8x8 satd WORD32 index_for_src_satd; (void)recond_stride_horz; (void)pic_type; (void)layer_id; if(!is_hbd) { pu1_recon = (UWORD8 *)p_recon; } /**** initialize the variables ****/ had_block_size = 4; if(sub_sampling_type == 1) // 420 { cu_ht = cu_size_luma / 2; cu_wd = cu_size_luma / 2; } else { cu_ht = cu_size_luma; cu_wd = cu_size_luma / 2; } num_horz_blocks = 2 * cu_wd / had_block_size; //ctb_width / had_block_size; ht_offset = -had_block_size; wd_offset = 0; //-had_block_size; cu_total_size = cu_ht * cu_wd; num_comp_had_blocks = 2 * cu_total_size / (had_block_size * had_block_size); index_for_src_satd = start_index; for(i = 0; i < 64; i++) { ai1_zeros_buffer[i] = 0; } psy_factor = PSY_STRENGTH_CHROMA; psy_rd_cost = 0; lambda_mod = lambda * psy_factor; /************************************************************/ /* loop over for every 4x4 blocks in the CU for Cb */ for(i = 0; i < num_comp_had_blocks; i++) { if(i % num_horz_blocks == 0) { wd_offset = -had_block_size; ht_offset += had_block_size; } wd_offset += had_block_size; /* source satd for the current 8x8 block */ source_satd = pui4_source_satd[index_for_src_satd]; if(i % 2 != 0) { if(!is_hbd) { pu1_l0_block = pu1_l0_block_prev + 1; } } else { if(!is_hbd) { /* get memory pointers for each of L0 and L1 blocks whose hadamard has to be computed */ pu1_l0_block = pu1_recon + recon_stride_vert * ht_offset + wd_offset; pu1_l0_block_prev = pu1_l0_block; } } if(had_block_size == 4) { if(!is_hbd) { recon_satd = ps_cmn_utils_optimised_function_list->pf_chroma_AC_HAD_4x4_8bit( pu1_l0_block, recon_stride_vert, ai1_zeros_buffer, had_block_size, pi2_residue_had, had_block_size); } /* get the additional cost function based on the absolute SATD diff of source and recon. */ psy_rd_cost += (lambda_mod * llabs(source_satd - recon_satd)); index_for_src_satd++; if((i % num_horz_blocks) == (num_horz_blocks - 1)) { index_for_src_satd -= num_horz_blocks; index_for_src_satd += (MAX_CU_SIZE / 8); /* Assuming CTB size = 64 and blocksize = 8 */ } } // if had block size ==4 } // for loop for all 4x4 block in the cu psy_rd_cost = psy_rd_cost >> (Q_PSY_STRENGTH_CHROMA + LAMBDA_Q_SHIFT); /* reutrn the additional cost for the psy RD opt */ return (psy_rd_cost); } /*! ****************************************************************************** * \if Function name : ihevce_psy_rd_cost \endif * * \brief * Calculates the psyco visual cost for RD opt. This is * * \param[in] pui4_source_satd * This is the pointer to the array of 8x8 satd of the corresponding source CTB. This is pre calculated. * \param[in] *pui1_recon * This si the pointer to the pred data. * \param[in] recon_stride * This si the pred stride * \param[in] pic_type * Picture type. * \param[in] layer_id * Indicates the temporal layer. * \param[in] lambda * This is the weighting factor for the cost. * * \return * the cost for the psyRDopt * * \author * Ittiam * ***************************************************************************** */ LWORD64 ihevce_psy_rd_cost( LWORD64 *pui4_source_satd, void *pv_recon, WORD32 recon_stride_vert, WORD32 recond_stride_horz, WORD32 cu_size, WORD32 pic_type, WORD32 layer_id, WORD32 lambda, WORD32 start_index, WORD32 is_hbd, UWORD32 u4_psy_strength, ihevce_cmn_opt_func_t *ps_cmn_utils_optimised_function_list) { /* declare local variables to store the SATD values for the pred for the current block. */ LWORD64 psy_rd_cost; // TODO : check if overflow is there. UWORD32 lambda_mod; WORD32 psy_factor; /* declare local variables */ WORD32 i; WORD32 cu_total_size; WORD32 num_comp_had_blocks; UWORD8 *pu1_l0_block; UWORD8 *pu1_recon; WORD32 ht_offset; WORD32 wd_offset; WORD32 cu_ht; WORD32 cu_wd; WORD32 num_horz_blocks; //WORD16 pi2_residue_had[64]; WORD16 pi2_residue_had_zscan[64]; //WORD16 pi2_residue[64]; /* this is used as a buffer with all values equal to 0. This is emulate the case with pred being zero in HAD fucntion */ UWORD8 ai1_zeros_buffer[64]; WORD32 had_block_size; LWORD64 source_satd; // to hold source for current 8x8 block LWORD64 recon_satd; // holds the current recon 8x8 satd WORD32 index_for_src_satd; (void)recond_stride_horz; (void)pic_type; (void)layer_id; /***** initialize the variables ****/ had_block_size = 8; cu_ht = cu_size; cu_wd = cu_size; num_horz_blocks = cu_wd / had_block_size; //ctb_width / had_block_size; ht_offset = -had_block_size; wd_offset = 0 - had_block_size; cu_total_size = cu_ht * cu_wd; num_comp_had_blocks = cu_total_size / (had_block_size * had_block_size); index_for_src_satd = start_index; for(i = 0; i < 64; i++) { ai1_zeros_buffer[i] = 0; } psy_factor = u4_psy_strength; //PSY_STRENGTH; psy_rd_cost = 0; lambda_mod = lambda * psy_factor; if(!is_hbd) { pu1_recon = (UWORD8 *)pv_recon; } /**************************************************************/ /* loop over for every 8x8 blocks in the CU */ for(i = 0; i < num_comp_had_blocks; i++) { if(i % num_horz_blocks == 0) { wd_offset = -had_block_size; ht_offset += had_block_size; } wd_offset += had_block_size; /* source satd for the current 8x8 block */ source_satd = pui4_source_satd[index_for_src_satd]; if(had_block_size == 8) { //WORD32 index; //WORD32 u4_satd; //WORD32 dst_strd = 8; //WORD32 i4_frm_qstep = 0; //WORD32 early_cbf; if(!is_hbd) { /* get memory pointers for each of L0 and L1 blocks whose hadamard has to be computed */ pu1_l0_block = pu1_recon + recon_stride_vert * ht_offset + wd_offset; recon_satd = ps_cmn_utils_optimised_function_list->pf_AC_HAD_8x8_8bit( pu1_l0_block, recon_stride_vert, ai1_zeros_buffer, had_block_size, pi2_residue_had_zscan, had_block_size); } /* get the additional cost function based on the absolute SATD diff of source and recon. */ psy_rd_cost += (lambda_mod * llabs(source_satd - recon_satd)); index_for_src_satd++; if((i % num_horz_blocks) == (num_horz_blocks - 1)) { index_for_src_satd -= num_horz_blocks; index_for_src_satd += (MAX_CU_SIZE / 8); /* Assuming CTB size = 64 and blocksize = 8 */ } } // if } // for loop psy_rd_cost = psy_rd_cost >> (Q_PSY_STRENGTH + LAMBDA_Q_SHIFT); /* reutrn the additional cost for the psy RD opt */ return (psy_rd_cost); } unsigned long ihevce_calc_stim_injected_variance( ULWORD64 *pu8_sigmaX, ULWORD64 *pu8_sigmaXSquared, ULWORD64 *u8_var, WORD32 i4_inv_wpred_wt, WORD32 i4_inv_wt_shift_val, WORD32 i4_wpred_log_wdc, WORD32 i4_part_id) { ULWORD64 u8_X_Square, u8_temp_var; WORD32 i4_bits_req; const WORD32 i4_default_src_wt = ((1 << 15) + (WGHT_DEFAULT >> 1)) / WGHT_DEFAULT; u8_X_Square = (pu8_sigmaX[i4_part_id] * pu8_sigmaX[i4_part_id]); u8_temp_var = pu8_sigmaXSquared[i4_part_id] - u8_X_Square; if(i4_inv_wpred_wt != i4_default_src_wt) { i4_inv_wpred_wt = i4_inv_wpred_wt >> i4_inv_wt_shift_val; u8_temp_var = SHR_NEG( (u8_temp_var * i4_inv_wpred_wt * i4_inv_wpred_wt), (30 - (2 * i4_inv_wt_shift_val) - i4_wpred_log_wdc * 2)); } GETRANGE64(i4_bits_req, u8_temp_var); if(i4_bits_req > 27) { *u8_var = u8_temp_var >> (i4_bits_req - 27); return (i4_bits_req - 27); } else { *u8_var = u8_temp_var; return 0; } } unsigned long ihevce_calc_variance_for_diff_weights( ULWORD64 *pu8_sigmaX, ULWORD64 *pu8_sigmaXSquared, ULWORD64 *u8_var, WORD32 *pi4_inv_wt, WORD32 *pi4_inv_wt_shift_val, pu_result_t *ps_result, WORD32 i4_wpred_log_wdc, PART_ID_T *pe_part_id, UWORD8 u1_cu_size, UWORD8 u1_num_parts, UWORD8 u1_is_for_src) { WORD32 i4_k; UWORD32 u4_wd, u4_ht; UWORD8 u1_num_base_blks; UWORD32 u4_num_pixels_in_part; UWORD8 u1_index; WORD32 i4_bits_req; UWORD8 u1_base_blk_size = 4; UWORD32 u4_tot_num_pixels = u1_cu_size * u1_cu_size; ULWORD64 u8_temp_sigmaX[MAX_NUM_INTER_PARTS] = { 0, 0 }; ULWORD64 u8_temp_sigmaXsquared[MAX_NUM_INTER_PARTS] = { 0, 0 }; ULWORD64 u8_z; const WORD32 i4_default_src_wt = ((1 << 15) + (WGHT_DEFAULT >> 1)) / WGHT_DEFAULT; for(i4_k = 0; i4_k < u1_num_parts; i4_k++) { u4_wd = ps_result[i4_k].pu.b4_wd + 1; u4_ht = ps_result[i4_k].pu.b4_ht + 1; u1_num_base_blks = u4_wd * u4_ht; u4_num_pixels_in_part = u1_num_base_blks * u1_base_blk_size * u1_base_blk_size; if(u1_is_for_src) { u1_index = pe_part_id[i4_k]; } else { u1_index = i4_k; } u8_temp_sigmaXsquared[i4_k] = pu8_sigmaXSquared[u1_index] / u4_num_pixels_in_part; u8_temp_sigmaX[i4_k] = pu8_sigmaX[u1_index]; if(u1_is_for_src) { if(pi4_inv_wt[i4_k] != i4_default_src_wt) { pi4_inv_wt[i4_k] = pi4_inv_wt[i4_k] >> pi4_inv_wt_shift_val[i4_k]; u8_temp_sigmaX[i4_k] = SHR_NEG( (u8_temp_sigmaX[i4_k] * pi4_inv_wt[i4_k]), (15 - pi4_inv_wt_shift_val[i4_k] - i4_wpred_log_wdc)); u8_temp_sigmaXsquared[i4_k] = SHR_NEG( (u8_temp_sigmaXsquared[i4_k] * pi4_inv_wt[i4_k] * pi4_inv_wt[i4_k]), (30 - (2 * pi4_inv_wt_shift_val[i4_k]) - i4_wpred_log_wdc * 2)); } } } u8_z = (u4_tot_num_pixels * (u8_temp_sigmaXsquared[0] + u8_temp_sigmaXsquared[1])) - ((u8_temp_sigmaX[0] + u8_temp_sigmaX[1]) * (u8_temp_sigmaX[0] + u8_temp_sigmaX[1])); GETRANGE64(i4_bits_req, u8_z); if(i4_bits_req > 27) { *u8_var = u8_z >> (i4_bits_req - 27); return (i4_bits_req - 27); } else { *u8_var = u8_z; return 0; } }