/****************************************************************************** * * Copyright (C) 2022 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 * isvcd_iquant_itrans.c * * @brief * Contains definition of functions for h264 inverse quantization inverse transformation and resd comp * * @author * Kishore * * @par List of Functions: * - isvcd_iquant_itrans_4x4() * - isvcd_iquant_itrans_8x8() * - isvcd_iquant_itrans_4x4_dc() * - isvcd_iquant_itrans_8x8_dc() * - isvcd_iquant_itrans_chroma_4x4() * - isvcd_iquant_itrans_chroma_4x4_dc() * * @remarks * ******************************************************************************* */ /*****************************************************************************/ /* File Includes */ /*****************************************************************************/ /* User include files */ #include "ih264_typedefs.h" #include "ih264_defs.h" #include "ih264_trans_macros.h" #include "ih264_macros.h" #include "ih264_platform_macros.h" #include "ih264_trans_data.h" #include "ih264_size_defs.h" #include "ih264_structs.h" #include "isvcd_iquant_itrans.h" /*****************************************************************************/ /* */ /* Function Name : isvcd_iquant_itrans_4x4 */ /* */ /* Description : this function computes the inverse quantized and */ /* inverse transformed output */ /* */ /* Inputs : */ /* Globals : none */ /* Processing : */ /* */ /* Outputs : none */ /* Returns : none */ /* */ /* Issues : none */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 25 11 2021 Kishore creation */ /* */ /*****************************************************************************/ void isvcd_iquant_itrans_4x4(WORD16 *pi2_src, WORD16 *pi2_out, WORD32 out_strd, const UWORD16 *pu2_iscal_mat, const UWORD16 *pu2_weigh_mat, UWORD32 u4_qp_div_6, WORD16 *pi2_tmp, WORD32 iq_start_idx, WORD16 *pi2_dc_ld_addr) { WORD16 *pi2_src_ptr = pi2_src; WORD16 *pi2_tmp_ptr = pi2_tmp; WORD16 *pi2_out_ptr = pi2_out; WORD16 x0, x1, x2, x3, i; WORD32 q0, q1, q2, q3; WORD16 i_macro; WORD16 rnd_fact = (u4_qp_div_6 < 4) ? 1 << (3 - u4_qp_div_6) : 0; /* inverse quant */ /*horizontal inverse transform */ for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) { q0 = pi2_src_ptr[0]; INV_QUANT(q0, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, rnd_fact, 4); if(i == 0 && iq_start_idx == 1) q0 = pi2_dc_ld_addr[0]; // Restoring dc value for intra case q2 = pi2_src_ptr[2]; INV_QUANT(q2, pu2_iscal_mat[2], pu2_weigh_mat[2], u4_qp_div_6, rnd_fact, 4); x0 = q0 + q2; x1 = q0 - q2; q1 = pi2_src_ptr[1]; INV_QUANT(q1, pu2_iscal_mat[1], pu2_weigh_mat[1], u4_qp_div_6, rnd_fact, 4); q3 = pi2_src_ptr[3]; INV_QUANT(q3, pu2_iscal_mat[3], pu2_weigh_mat[3], u4_qp_div_6, rnd_fact, 4); x2 = (q1 >> 1) - q3; x3 = q1 + (q3 >> 1); pi2_tmp_ptr[0] = x0 + x3; pi2_tmp_ptr[1] = x1 + x2; pi2_tmp_ptr[2] = x1 - x2; pi2_tmp_ptr[3] = x0 - x3; pi2_src_ptr += SUB_BLK_WIDTH_4x4; pi2_tmp_ptr += SUB_BLK_WIDTH_4x4; pu2_iscal_mat += SUB_BLK_WIDTH_4x4; pu2_weigh_mat += SUB_BLK_WIDTH_4x4; } /* vertical inverse transform */ pi2_tmp_ptr = pi2_tmp; for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) { pi2_out = pi2_out_ptr; x0 = (pi2_tmp_ptr[0] + pi2_tmp_ptr[8]); x1 = (pi2_tmp_ptr[0] - pi2_tmp_ptr[8]); x2 = (pi2_tmp_ptr[4] >> 1) - pi2_tmp_ptr[12]; x3 = pi2_tmp_ptr[4] + (pi2_tmp_ptr[12] >> 1); /* inverse prediction */ i_macro = x0 + x3; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_out += out_strd; i_macro = x1 + x2; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_out += out_strd; i_macro = x1 - x2; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_out += out_strd; i_macro = x0 - x3; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_tmp_ptr++; pi2_out_ptr++; } } /*****************************************************************************/ /* */ /* Function Name : isvcd_iquant_itrans_4x4_dc */ /* */ /* Description : this function computes the inverse quantized and */ /* inverse transformed output */ /* */ /* Inputs : */ /* Globals : none */ /* Processing : */ /* */ /* Outputs : none */ /* Returns : none */ /* */ /* Issues : none */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 25 11 2021 Kishore creation */ /* */ /*****************************************************************************/ void isvcd_iquant_itrans_4x4_dc(WORD16 *pi2_src, WORD16 *pi2_out, WORD32 out_strd, const UWORD16 *pu2_iscal_mat, const UWORD16 *pu2_weigh_mat, UWORD32 u4_qp_div_6, WORD16 *pi2_tmp, WORD32 iq_start_idx, WORD16 *pi2_dc_ld_addr) { WORD16 *pi2_out_ptr = pi2_out; WORD32 q0; WORD16 i_macro, i; WORD16 rnd_fact = (u4_qp_div_6 < 4) ? 1 << (3 - u4_qp_div_6) : 0; UNUSED(pi2_tmp); if(iq_start_idx == 0) { q0 = pi2_src[0]; INV_QUANT(q0, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, rnd_fact, 4); } else { q0 = pi2_dc_ld_addr[0]; // Restoring dc value for intra case3 } i_macro = CLIP_RSD((q0 + 32) >> 6); for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) { pi2_out = pi2_out_ptr; /* inverse prediction */ *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out_ptr++; } } /*****************************************************************************/ /* */ /* Function Name : isvcd_iquant_itrans_chroma_4x4 */ /* */ /* Description : this function computes the inverse quantized and */ /* inverse transformed output */ /* */ /* Inputs : */ /* Globals : none */ /* Processing : */ /* */ /* Outputs : none */ /* Returns : none */ /* */ /* Issues : none */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 25 11 2021 Kishore creation */ /* */ /*****************************************************************************/ void isvcd_iquant_itrans_chroma_4x4(WORD16 *pi2_src, WORD16 *pi2_out, WORD32 out_strd, const UWORD16 *pu2_iscal_mat, const UWORD16 *pu2_weigh_mat, UWORD32 u4_qp_div_6, WORD16 *pi2_tmp, WORD16 *pi2_dc_src) { WORD16 *pi2_src_ptr = pi2_src; WORD16 *pi2_tmp_ptr = pi2_tmp; WORD16 *pi2_out_ptr = pi2_out; WORD16 x0, x1, x2, x3, i; WORD32 q0, q1, q2, q3; WORD16 i_macro; WORD16 rnd_fact = (u4_qp_div_6 < 4) ? 1 << (3 - u4_qp_div_6) : 0; /* inverse quant */ /*horizontal inverse transform */ for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) { if(i == 0) { q0 = pi2_dc_src[0]; } else { q0 = pi2_src_ptr[0]; INV_QUANT(q0, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, rnd_fact, 4); } q2 = pi2_src_ptr[2]; INV_QUANT(q2, pu2_iscal_mat[2], pu2_weigh_mat[2], u4_qp_div_6, rnd_fact, 4); x0 = q0 + q2; x1 = q0 - q2; q1 = pi2_src_ptr[1]; INV_QUANT(q1, pu2_iscal_mat[1], pu2_weigh_mat[1], u4_qp_div_6, rnd_fact, 4); q3 = pi2_src_ptr[3]; INV_QUANT(q3, pu2_iscal_mat[3], pu2_weigh_mat[3], u4_qp_div_6, rnd_fact, 4); x2 = (q1 >> 1) - q3; x3 = q1 + (q3 >> 1); pi2_tmp_ptr[0] = x0 + x3; pi2_tmp_ptr[1] = x1 + x2; pi2_tmp_ptr[2] = x1 - x2; pi2_tmp_ptr[3] = x0 - x3; pi2_src_ptr += SUB_BLK_WIDTH_4x4; pi2_tmp_ptr += SUB_BLK_WIDTH_4x4; pu2_iscal_mat += SUB_BLK_WIDTH_4x4; pu2_weigh_mat += SUB_BLK_WIDTH_4x4; } /* vertical inverse transform */ pi2_tmp_ptr = pi2_tmp; for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) { pi2_out = pi2_out_ptr; x0 = (pi2_tmp_ptr[0] + pi2_tmp_ptr[8]); x1 = (pi2_tmp_ptr[0] - pi2_tmp_ptr[8]); x2 = (pi2_tmp_ptr[4] >> 1) - pi2_tmp_ptr[12]; x3 = pi2_tmp_ptr[4] + (pi2_tmp_ptr[12] >> 1); /* inverse prediction */ i_macro = x0 + x3; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_out += out_strd; i_macro = x1 + x2; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_out += out_strd; i_macro = x1 - x2; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_out += out_strd; i_macro = x0 - x3; *pi2_out = CLIP_RSD((i_macro + 32) >> 6); pi2_tmp_ptr++; pi2_out_ptr += 2; // Interleaved store for output } } /*****************************************************************************/ /* */ /* Function Name : isvcd_iquant_itrans_chroma_4x4_dc */ /* */ /* Description : this function computes the inverse quantized and */ /* inverse transformed output */ /* */ /* Inputs : */ /* Globals : none */ /* Processing : */ /* */ /* Outputs : none */ /* Returns : none */ /* */ /* Issues : none */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 25 11 2021 Kishore creation */ /* */ /*****************************************************************************/ void isvcd_iquant_itrans_chroma_4x4_dc(WORD16 *pi2_src, WORD16 *pi2_out, WORD32 out_strd, const UWORD16 *pu2_iscal_mat, const UWORD16 *pu2_weigh_mat, UWORD32 u4_qp_div_6, WORD16 *pi2_tmp, WORD16 *pi2_dc_src) { WORD16 *pi2_out_ptr = pi2_out; WORD32 q0; WORD16 i_macro, i; UNUSED(pi2_src); UNUSED(pu2_iscal_mat); UNUSED(pu2_weigh_mat); UNUSED(u4_qp_div_6); UNUSED(pi2_tmp); q0 = pi2_dc_src[0]; // Restoring dc value for intra case3 i_macro = CLIP_RSD((q0 + 32) >> 6); for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) { pi2_out = pi2_out_ptr; /* inverse prediction */ *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out_ptr += 2; } } /** ******************************************************************************* * * @brief * This function performs inverse quant and Inverse transform type Ci4 for 8x8 *block * * @par Description: * Performs inverse transform Ci8 and adds the residue to get the * reconstructed block * * @param[in] pi2_src * Input 8x8coefficients * * @param[in] pu1_pred * Prediction 8x8 block * * @param[out] pu1_recon * Output 8x8 block * * @param[in] q_div * QP/6 * * @param[in] q_rem * QP%6 * * @param[in] q_lev * Quantizer level * * @param[in] src_strd * Input stride * * @param[in] pred_strd, * Prediction stride * * @param[in] out_strd * Output Stride * * @param[in] pi4_tmp * temporary buffer of size 1*16 we dont need a bigger blcok since we reuse * the tmp for each block * * @param[in] pu4_iquant_mat * Pointer to the inverse quantization matrix * * @returns Void * * @remarks * None * ******************************************************************************* */ void isvcd_iquant_itrans_8x8_dc(WORD16 *pi2_src, WORD16 *pi2_out, WORD32 out_strd, const UWORD16 *pu2_iscale_mat, const UWORD16 *pu2_weigh_mat, UWORD32 qp_div, WORD16 *pi2_tmp, WORD32 iq_start_idx, WORD16 *pi2_dc_ld_addr) { WORD16 *pi2_out_ptr = pi2_out; WORD16 i, i_macro; WORD32 q; WORD32 rnd_fact = (qp_div < 6) ? (1 << (5 - qp_div)) : 0; UNUSED(pi2_tmp); UNUSED(iq_start_idx); UNUSED(pi2_dc_ld_addr); /*************************************************************/ /* Dequantization of coefficients. Will be replaced by SIMD */ /* operations on platform. Note : DC coeff is not scaled */ /*************************************************************/ q = pi2_src[0]; INV_QUANT(q, pu2_iscale_mat[0], pu2_weigh_mat[0], qp_div, rnd_fact, 6); i_macro = CLIP_RSD((q + 32) >> 6); /* Perform Inverse transform */ /*--------------------------------------------------------------------*/ /* IDCT [ Horizontal transformation ] */ /*--------------------------------------------------------------------*/ /*--------------------------------------------------------------------*/ /* IDCT [ Vertical transformation] and Xij = (xij + 32)>>6 */ /* */ /* Add the prediction and store it back to reconstructed frame buffer */ /* [Prediction buffer itself in this case] */ /*--------------------------------------------------------------------*/ for(i = 0; i < SUB_BLK_WIDTH_8x8; i++) { pi2_out = pi2_out_ptr; *pi2_out = i_macro; /* Change uc_recBuffer to Point to next element in the same column*/ pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out += out_strd; *pi2_out = i_macro; pi2_out_ptr++; } } /*****************************************************************************/ /* */ /* Function Name : isvcd_iquant_itrans_8x8 */ /* */ /* Description : this function computes the inverse quantized and */ /* inverse transformed output */ /* */ /* Inputs : */ /* Globals : none */ /* Processing : */ /* */ /* Outputs : none */ /* Returns : none */ /* */ /* Issues : none */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 25 11 2021 Kishore creation */ /* */ /*****************************************************************************/ void isvcd_iquant_itrans_8x8(WORD16 *pi2_src, WORD16 *pi2_out, WORD32 out_strd, const UWORD16 *pu2_iscale_mat, const UWORD16 *pu2_weigh_mat, UWORD32 qp_div, WORD16 *pi2_tmp, WORD32 iq_start_idx, WORD16 *pi2_dc_ld_addr) { WORD32 i; WORD16 *pi2_tmp_ptr = pi2_tmp; WORD16 *pi2_out_ptr = pi2_out; WORD16 i_z0, i_z1, i_z2, i_z3, i_z4, i_z5, i_z6, i_z7; WORD16 i_y0, i_y1, i_y2, i_y3, i_y4, i_y5, i_y6, i_y7; WORD32 q; WORD32 rnd_fact = (qp_div < 6) ? (1 << (5 - qp_div)) : 0; UNUSED(iq_start_idx); UNUSED(pi2_dc_ld_addr); /*************************************************************/ /* De quantization of coefficients. Will be replaced by SIMD */ /* operations on platform. Note : DC coeff is not scaled */ /*************************************************************/ for(i = 0; i < (SUB_BLK_WIDTH_8x8 * SUB_BLK_WIDTH_8x8); i++) { q = pi2_src[i]; INV_QUANT(q, pu2_iscale_mat[i], pu2_weigh_mat[i], qp_div, rnd_fact, 6); pi2_tmp_ptr[i] = q; } /* Perform Inverse transform */ /*--------------------------------------------------------------------*/ /* IDCT [ Horizontal transformation ] */ /*--------------------------------------------------------------------*/ for(i = 0; i < SUB_BLK_WIDTH_8x8; i++) { /*------------------------------------------------------------------*/ /* y0 = w0 + w4 */ /* y1 = -w3 + w5 - w7 - (w7 >> 1) */ /* y2 = w0 - w4 */ /* y3 = w1 + w7 - w3 - (w3 >> 1) */ /* y4 = (w2 >> 1) - w6 */ /* y5 = -w1 + w7 + w5 + (w5 >> 1) */ /* y6 = w2 + (w6 >> 1) */ /* y7 = w3 + w5 + w1 + (w1 >> 1) */ /*------------------------------------------------------------------*/ i_y0 = (pi2_tmp_ptr[0] + pi2_tmp_ptr[4]); i_y1 = ((WORD32) (-pi2_tmp_ptr[3]) + pi2_tmp_ptr[5] - pi2_tmp_ptr[7] - (pi2_tmp_ptr[7] >> 1)); i_y2 = (pi2_tmp_ptr[0] - pi2_tmp_ptr[4]); i_y3 = ((WORD32) pi2_tmp_ptr[1] + pi2_tmp_ptr[7] - pi2_tmp_ptr[3] - (pi2_tmp_ptr[3] >> 1)); i_y4 = ((pi2_tmp_ptr[2] >> 1) - pi2_tmp_ptr[6]); i_y5 = ((WORD32) (-pi2_tmp_ptr[1]) + pi2_tmp_ptr[7] + pi2_tmp_ptr[5] + (pi2_tmp_ptr[5] >> 1)); i_y6 = (pi2_tmp_ptr[2] + (pi2_tmp_ptr[6] >> 1)); i_y7 = ((WORD32) pi2_tmp_ptr[3] + pi2_tmp_ptr[5] + pi2_tmp_ptr[1] + (pi2_tmp_ptr[1] >> 1)); /*------------------------------------------------------------------*/ /* z0 = y0 + y6 */ /* z1 = y1 + (y7 >> 2) */ /* z2 = y2 + y4 */ /* z3 = y3 + (y5 >> 2) */ /* z4 = y2 - y4 */ /* z5 = (y3 >> 2) - y5 */ /* z6 = y0 - y6 */ /* z7 = y7 - (y1 >> 2) */ /*------------------------------------------------------------------*/ i_z0 = i_y0 + i_y6; i_z1 = i_y1 + (i_y7 >> 2); i_z2 = i_y2 + i_y4; i_z3 = i_y3 + (i_y5 >> 2); i_z4 = i_y2 - i_y4; i_z5 = (i_y3 >> 2) - i_y5; i_z6 = i_y0 - i_y6; i_z7 = i_y7 - (i_y1 >> 2); /*------------------------------------------------------------------*/ /* x0 = z0 + z7 */ /* x1 = z2 + z5 */ /* x2 = z4 + z3 */ /* x3 = z6 + z1 */ /* x4 = z6 - z1 */ /* x5 = z4 - z3 */ /* x6 = z2 - z5 */ /* x7 = z0 - z7 */ /*------------------------------------------------------------------*/ pi2_tmp_ptr[0] = i_z0 + i_z7; pi2_tmp_ptr[1] = i_z2 + i_z5; pi2_tmp_ptr[2] = i_z4 + i_z3; pi2_tmp_ptr[3] = i_z6 + i_z1; pi2_tmp_ptr[4] = i_z6 - i_z1; pi2_tmp_ptr[5] = i_z4 - i_z3; pi2_tmp_ptr[6] = i_z2 - i_z5; pi2_tmp_ptr[7] = i_z0 - i_z7; /* move to the next row */ // pi2_src_ptr += SUB_BLK_WIDTH_8x8; pi2_tmp_ptr += SUB_BLK_WIDTH_8x8; } /*--------------------------------------------------------------------*/ /* IDCT [ Vertical transformation] and Xij = (xij + 32)>>6 */ /* */ /* Add the prediction and store it back to reconstructed frame buffer */ /* [Prediction buffer itself in this case] */ /*--------------------------------------------------------------------*/ pi2_tmp_ptr = pi2_tmp; for(i = 0; i < SUB_BLK_WIDTH_8x8; i++) { pi2_out = pi2_out_ptr; /*------------------------------------------------------------------*/ /* y0j = w0j + w4j */ /* y1j = -w3j + w5j -w7j -(w7j >> 1) */ /* y2j = w0j -w4j */ /* y3j = w1j + w7j -w3j -(w3j >> 1) */ /* y4j = ( w2j >> 1 ) -w6j */ /* y5j = -w1j + w7j + w5j + (w5j >> 1) */ /* y6j = w2j + ( w6j >> 1 ) */ /* y7j = w3j + w5j + w1j + (w1j >> 1) */ /*------------------------------------------------------------------*/ i_y0 = pi2_tmp_ptr[0] + pi2_tmp_ptr[32]; i_y1 = (WORD32) (-pi2_tmp_ptr[24]) + pi2_tmp_ptr[40] - pi2_tmp_ptr[56] - (pi2_tmp_ptr[56] >> 1); i_y2 = pi2_tmp_ptr[0] - pi2_tmp_ptr[32]; i_y3 = (WORD32) pi2_tmp_ptr[8] + pi2_tmp_ptr[56] - pi2_tmp_ptr[24] - (pi2_tmp_ptr[24] >> 1); i_y4 = (pi2_tmp_ptr[16] >> 1) - pi2_tmp_ptr[48]; i_y5 = (WORD32) (-pi2_tmp_ptr[8]) + pi2_tmp_ptr[56] + pi2_tmp_ptr[40] + (pi2_tmp_ptr[40] >> 1); i_y6 = pi2_tmp_ptr[16] + (pi2_tmp_ptr[48] >> 1); i_y7 = (WORD32) pi2_tmp_ptr[24] + pi2_tmp_ptr[40] + pi2_tmp_ptr[8] + (pi2_tmp_ptr[8] >> 1); /*------------------------------------------------------------------*/ /* z0j = y0j + y6j */ /* z1j = y1j + (y7j >> 2) */ /* z2j = y2j + y4j */ /* z3j = y3j + (y5j >> 2) */ /* z4j = y2j -y4j */ /* z5j = (y3j >> 2) -y5j */ /* z6j = y0j -y6j */ /* z7j = y7j -(y1j >> 2) */ /*------------------------------------------------------------------*/ i_z0 = i_y0 + i_y6; i_z1 = i_y1 + (i_y7 >> 2); i_z2 = i_y2 + i_y4; i_z3 = i_y3 + (i_y5 >> 2); i_z4 = i_y2 - i_y4; i_z5 = (i_y3 >> 2) - i_y5; i_z6 = i_y0 - i_y6; i_z7 = i_y7 - (i_y1 >> 2); /*------------------------------------------------------------------*/ /* x0j = z0j + z7j */ /* x1j = z2j + z5j */ /* x2j = z4j + z3j */ /* x3j = z6j + z1j */ /* x4j = z6j -z1j */ /* x5j = z4j -z3j */ /* x6j = z2j -z5j */ /* x7j = z0j -z7j */ /*------------------------------------------------------------------*/ *pi2_out = CLIP_RSD((i_z0 + i_z7 + 32) >> 6); /* Change uc_recBuffer to Point to next element in the same column*/ pi2_out += out_strd; *pi2_out = CLIP_RSD((i_z2 + i_z5 + 32) >> 6); pi2_out += out_strd; *pi2_out = CLIP_RSD((i_z4 + i_z3 + 32) >> 6); pi2_out += out_strd; *pi2_out = CLIP_RSD((i_z6 + i_z1 + 32) >> 6); pi2_out += out_strd; *pi2_out = CLIP_RSD((i_z6 - i_z1 + 32) >> 6); pi2_out += out_strd; *pi2_out = CLIP_RSD((i_z4 - i_z3 + 32) >> 6); pi2_out += out_strd; *pi2_out = CLIP_RSD((i_z2 - i_z5 + 32) >> 6); pi2_out += out_strd; *pi2_out = CLIP_RSD((i_z0 - i_z7 + 32) >> 6); pi2_tmp_ptr++; pi2_out_ptr++; } }