| /****************************************************************************** |
| * |
| * Copyright (C) 2015 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 |
| * ih264_resi_trans_quant.c |
| * |
| * @brief |
| * Contains function definitions single stage forward transform for H.264 |
| * It will calculate the residue, do the cf and then do quantization |
| * |
| * @author |
| * Ittiam |
| * |
| * @par List of Functions: |
| * - ih264_resi_trans_quant_4x4() |
| * - ih264_resi_trans_quant_chroma_4x4 |
| * - ih264_hadamard_quant_4x4 |
| * - ih264_hadamard_quant_2x2_uv |
| * - ih264_resi_trans_quant_8x8 |
| * |
| * @remarks |
| ******************************************************************************* |
| */ |
| |
| /*****************************************************************************/ |
| /* File Includes */ |
| /*****************************************************************************/ |
| |
| /* System include files */ |
| #include <stddef.h> |
| |
| /* User include files */ |
| #include "ih264_typedefs.h" |
| #include "ih264_defs.h" |
| #include "ih264_size_defs.h" |
| #include "ih264_macros.h" |
| #include "ih264_trans_macros.h" |
| #include "ih264_trans_data.h" |
| #include "ih264_structs.h" |
| #include "ih264_trans_quant_itrans_iquant.h" |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs forward transform and quantization on a 4*4 block |
| * |
| * @par Description: |
| * The function accepts source buffer and estimation buffer. From these, it |
| * computes the residue. This is residue is then transformed and quantized. |
| * The transform and quantization are in placed computed. They use the residue |
| * buffer for this. |
| * |
| * @param[in] pu1_src |
| * Pointer to source sub-block |
| * |
| * @param[in] pu1_pred |
| * Pointer to prediction sub-block |
| * |
| * @param[in] pi2_out |
| * Pointer to residual sub-block |
| * |
| * @param[in] src_strd |
| * Source stride |
| * |
| * @param[in] pred_strd |
| * Prediction stride |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] u4_qbits |
| * QP_BITS_h264_4x4 + floor(QP/6) |
| * |
| * @param[in] pu2_threshold_matrix |
| * Pointer to Forward Quant Threshold Matrix |
| * |
| * @param[in] pu2_scale_matrix |
| * Pointer to Forward Quant Scale Matrix |
| * |
| * @param[in] u4_round_factor |
| * Quantization Round factor |
| * |
| * @param[out] pu1_nnz |
| * Total non-zero coefficients in the current sub-block |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| void ih264_resi_trans_quant_4x4(UWORD8 *pu1_src, |
| UWORD8 *pu1_pred, |
| WORD16 *pi2_out, |
| WORD32 src_strd, |
| WORD32 pred_strd, |
| const UWORD16 *pu2_scale_matrix, |
| const UWORD16 *pu2_threshold_matrix, |
| UWORD32 u4_qbits, |
| UWORD32 u4_round_factor, |
| UWORD8 *pu1_nnz, |
| WORD16 *pi2_alt_dc_addr) |
| { |
| UWORD32 i; |
| WORD32 x0, x1, x2, x3, x4, x5, x6, x7; |
| WORD32 i4_value, i4_sign; |
| UWORD32 u4_abs_value; |
| WORD16 *pi2_out_tmp = pi2_out; |
| UWORD32 u4_nonzero_coeff = 0; |
| |
| for (i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
| { |
| /* computing prediction error (residue) */ |
| x4 = pu1_src[0] - pu1_pred[0]; |
| x5 = pu1_src[1] - pu1_pred[1]; |
| x6 = pu1_src[2] - pu1_pred[2]; |
| x7 = pu1_src[3] - pu1_pred[3]; |
| |
| /* Horizontal transform */ |
| x0 = x4 + x7; |
| x1 = x5 + x6; |
| x2 = x5 - x6; |
| x3 = x4 - x7; |
| |
| pi2_out_tmp[0] = x0 + x1; |
| pi2_out_tmp[1] = (x3 <<1) + x2; |
| pi2_out_tmp[2] = x0 - x1; |
| pi2_out_tmp[3] = x3 - (x2<<1); |
| |
| /* pointing to next row; */ |
| pu1_src += src_strd; |
| pu1_pred += pred_strd; |
| pi2_out_tmp += 4; |
| |
| } |
| pi2_out_tmp = pi2_out; |
| for (i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
| { |
| |
| /* Vertical transform and quantization */ |
| x4 = pi2_out_tmp[0]; |
| x5 = pi2_out_tmp[4]; |
| x6 = pi2_out_tmp[8]; |
| x7 = pi2_out_tmp[12]; |
| |
| |
| x0 = x4 + x7; |
| x1 = x5 + x6; |
| x2 = x5 - x6; |
| x3 = x4 - x7; |
| |
| /* quantization is done in place */ |
| |
| i4_value = x0 + x1; |
| |
| if(i==0) |
| { |
| (*pi2_alt_dc_addr) = i4_value; |
| } |
| |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], pu2_scale_matrix[0], u4_round_factor, u4_qbits, u4_nonzero_coeff); |
| pi2_out_tmp[0] = i4_value; |
| |
| |
| i4_value = (x3 << 1) + x2; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[4], pu2_scale_matrix[4], u4_round_factor, u4_qbits, u4_nonzero_coeff); |
| pi2_out_tmp[4] = i4_value; |
| |
| |
| i4_value = x0 - x1; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[8], pu2_scale_matrix[8], u4_round_factor, u4_qbits, u4_nonzero_coeff); |
| pi2_out_tmp[8] = i4_value; |
| |
| |
| i4_value = x3 - (x2 << 1); |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[12], pu2_scale_matrix[12], u4_round_factor, u4_qbits, u4_nonzero_coeff); |
| pi2_out_tmp[12] = i4_value; |
| |
| pi2_out_tmp ++; |
| pu2_scale_matrix++; |
| pu2_threshold_matrix++; |
| } |
| |
| /* Return total nonzero coefficients in the current sub block */ |
| *pu1_nnz = u4_nonzero_coeff; |
| } |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs forward transform and quantization on a 4*4 chroma block |
| * with interleaved values |
| * |
| * @par Description: |
| * The function accepts source buffer and estimation buffer. From these, it |
| * computes the residue. This is residue is then transformed and quantized. |
| * The transform and quantization are in placed computed. They use the residue |
| * buffer for this. |
| * |
| * @param[in] pu1_src |
| * Pointer to source sub-block |
| * |
| * @param[in] pu1_pred |
| * Pointer to prediction sub-block |
| * |
| * @param[in] pi2_out |
| * Pointer to residual sub-block |
| * |
| * @param[in] src_strd |
| * Source stride |
| * |
| * @param[in] pred_strd |
| * Prediction stride |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] u4_qbits |
| * QP_BITS_h264_4x4 + floor(QP/6) |
| * |
| * @param[in] pu2_threshold_matrix |
| * Pointer to Forward Quant Threshold Matrix |
| * |
| * @param[in] pu2_scale_matrix |
| * Pointer to Forward Quant Scale Matrix |
| * |
| * @param[in] u4_round_factor |
| * Quantization Round factor |
| * |
| * @param[out] pu1_nnz |
| * Total non-zero coefficients in the current sub-block |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| void ih264_resi_trans_quant_chroma_4x4(UWORD8 *pu1_src, |
| UWORD8 *pu1_pred, |
| WORD16 *pi2_out, |
| WORD32 src_strd, |
| WORD32 pred_strd, |
| const UWORD16 *pu2_scale_matrix, |
| const UWORD16 *pu2_threshold_matrix, |
| UWORD32 u4_qbits, |
| UWORD32 u4_round_factor, |
| UWORD8 *pu1_nnz, |
| WORD16 *pu1_dc_alt_addr) |
| { |
| UWORD32 i; |
| WORD32 x0, x1, x2, x3, x4, x5, x6, x7; |
| WORD32 i4_value, i4_sign; |
| UWORD32 u4_abs_value; |
| WORD16 *pi2_out_tmp = pi2_out; |
| UWORD32 u4_nonzero_coeff = 0; |
| |
| for (i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
| { |
| /* computing prediction error (residue) */ |
| x4 = pu1_src[0] - pu1_pred[0]; |
| x5 = pu1_src[2] - pu1_pred[2]; |
| x6 = pu1_src[4] - pu1_pred[4]; |
| x7 = pu1_src[6] - pu1_pred[6]; |
| |
| /* Horizontal transform */ |
| x0 = x4 + x7; |
| x1 = x5 + x6; |
| x2 = x5 - x6; |
| x3 = x4 - x7; |
| |
| pi2_out_tmp[0] = x0 + x1; |
| pi2_out_tmp[1] = (x3 <<1) + x2; |
| pi2_out_tmp[2] = x0 - x1; |
| pi2_out_tmp[3] = x3 - (x2<<1); |
| |
| /* pointing to next row; */ |
| pu1_src += src_strd; |
| pu1_pred += pred_strd; |
| pi2_out_tmp += 4; |
| |
| } |
| pi2_out_tmp = pi2_out; |
| for (i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
| { |
| |
| /* Vertical transform and quantization */ |
| x4 = pi2_out_tmp[0]; |
| x5 = pi2_out_tmp[4]; |
| x6 = pi2_out_tmp[8]; |
| x7 = pi2_out_tmp[12]; |
| |
| |
| x0 = x4 + x7; |
| x1 = x5 + x6; |
| x2 = x5 - x6; |
| x3 = x4 - x7; |
| |
| /* quantization is done in place */ |
| |
| i4_value = x0 + x1; |
| |
| if(i==0) |
| { |
| *pu1_dc_alt_addr = i4_value; |
| } |
| |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[0] = i4_value; |
| |
| i4_value = (x3 << 1) + x2; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[4], |
| pu2_scale_matrix[4], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[4] = i4_value; |
| |
| i4_value = x0 - x1; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[8], |
| pu2_scale_matrix[8], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[8] = i4_value; |
| |
| i4_value = x3 - (x2 << 1); |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[12], |
| pu2_scale_matrix[12], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[12] = i4_value; |
| |
| pi2_out_tmp ++; |
| pu2_scale_matrix++; |
| pu2_threshold_matrix++; |
| } |
| |
| /* Return total nonzero coefficients in the current sub block */ |
| *pu1_nnz = u4_nonzero_coeff; |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs forward hadamard transform and quantization on a 4*4 block |
| * |
| * @par Description: |
| * The function accepts source buffer and estimation buffer. From these, it |
| * computes the residue. This is residue is then transformed and quantized. |
| * The transform and quantization are in placed computed. They use the residue |
| * buffer for this. |
| * |
| * @param[in] pu1_src |
| * Pointer to source sub-block |
| * |
| * @param[in] pu1_pred |
| * Pointer to prediction sub-block |
| * |
| * @param[in] pi2_out |
| * Pointer to residual sub-block |
| * |
| * @param[in] src_strd |
| * Source stride |
| * |
| * @param[in] pred_strd |
| * Prediction stride |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] u4_qbits |
| * QP_BITS_h264_4x4 + floor(QP/6) |
| * |
| * @param[in] pu2_threshold_matrix |
| * Pointer to Forward Quant Threshold Matrix |
| * |
| * @param[in] pu2_scale_matrix |
| * Pointer to Forward Quant Scale Matrix |
| * |
| * @param[in] u4_round_factor |
| * Quantization Round factor |
| * |
| * @param[out] pu1_nnz |
| * Total non-zero coefficients in the current sub-block |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| */ |
| |
| void ih264_hadamard_quant_4x4(WORD16 *pi2_src, |
| WORD16 *pi2_dst, |
| const UWORD16 *pu2_scale_matrix, |
| const UWORD16 *pu2_threshold_matrix, |
| UWORD32 u4_qbits, |
| UWORD32 u4_round_factor, |
| UWORD8 *pu1_nnz) |
| { |
| WORD32 i; |
| WORD32 x0,x1,x2,x3,x4,x5,x6,x7,i4_value; |
| UWORD32 u4_abs_value; |
| WORD32 i4_sign; |
| |
| *pu1_nnz = 0; |
| |
| for (i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
| { |
| x4 = pi2_src[0]; |
| x5 = pi2_src[1]; |
| x6 = pi2_src[2]; |
| x7 = pi2_src[3]; |
| |
| x0 = x4 + x7; |
| x1 = x5 + x6; |
| x2 = x5 - x6; |
| x3 = x4 - x7; |
| |
| pi2_dst[0] = x0 + x1; |
| pi2_dst[1] = x3 + x2; |
| pi2_dst[2] = x0 - x1; |
| pi2_dst[3] = x3 - x2; |
| |
| pi2_src += 4; |
| pi2_dst += 4; |
| } |
| |
| /* Vertical transform and quantization */ |
| pi2_dst -= SUB_BLK_WIDTH_4x4<<2; |
| |
| for (i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
| { |
| x4 = pi2_dst[0]; |
| x5 = pi2_dst[4]; |
| x6 = pi2_dst[8]; |
| x7 = pi2_dst[12] ; |
| |
| x0 = x4 + x7; |
| x1 = x5 + x6; |
| x2 = x5 - x6; |
| x3 = x4 - x7; |
| |
| |
| i4_value = (x0 + x1) >> 1; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]); |
| pi2_dst[0] = i4_value; |
| |
| i4_value = (x3 + x2) >> 1; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]); |
| pi2_dst[4] = i4_value; |
| |
| i4_value = (x0 - x1) >> 1; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]); |
| pi2_dst[8] = i4_value; |
| |
| i4_value = (x3 - x2) >> 1; |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, pu1_nnz[0]); |
| pi2_dst[12] = i4_value; |
| |
| pi2_dst ++; |
| } |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs forward hadamard transform and quantization on a 2*2 block |
| * for both U and V planes |
| * |
| * @par Description: |
| * The function accepts source buffer and estimation buffer. From these, it |
| * computes the residue. This is residue is then transformed and quantized. |
| * The transform and quantization are in placed computed. They use the residue |
| * buffer for this. |
| * |
| * @param[in] pu1_src |
| * Pointer to source sub-block |
| * |
| * @param[in] pu1_pred |
| * Pointer to prediction sub-block |
| * |
| * @param[in] pi2_out |
| * Pointer to residual sub-block |
| * |
| * @param[in] src_strd |
| * Source stride |
| * |
| * @param[in] pred_strd |
| * Prediction stride |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] u4_qbits |
| * QP_BITS_h264_4x4 + floor(QP/6) |
| * |
| * @param[in] pu2_threshold_matrix |
| * Pointer to Forward Quant Threshold Matrix |
| * |
| * @param[in] pu2_scale_matrix |
| * Pointer to Forward Quant Scale Matrix |
| * |
| * @param[in] u4_round_factor |
| * Quantization Round factor |
| * |
| * @param[out] pu1_nnz |
| * Total non-zero coefficients in the current sub-block |
| * |
| * @returns |
| * |
| * @remarks |
| * NNZ for dc is populated at 0 and 5th position of pu1_nnz |
| * |
| */ |
| |
| void ih264_hadamard_quant_2x2_uv(WORD16 *pi2_src, |
| WORD16 *pi2_dst, |
| const UWORD16 *pu2_scale_matrix, |
| const UWORD16 *pu2_threshold_matrix, |
| UWORD32 u4_qbits, |
| UWORD32 u4_round_factor, |
| UWORD8 *pu1_nnz) |
| { |
| WORD32 x0, x1, x2, x3, x4, x5, x6, x7; |
| WORD32 i4_value, i4_sign, plane; |
| UWORD32 u4_abs_value; |
| |
| for(plane = 0; plane < 2; plane++) |
| { |
| pu1_nnz[plane] = 0; |
| |
| /* Horizontal transform */ |
| x4 = pi2_src[0]; |
| x5 = pi2_src[1]; |
| x6 = pi2_src[2]; |
| x7 = pi2_src[3]; |
| |
| x0 = x4 + x5; |
| x1 = x4 - x5; |
| x2 = x6 + x7; |
| x3 = x6 - x7; |
| |
| /* Vertical transform and quantization */ |
| i4_value = (x0 + x2); |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, |
| pu1_nnz[plane]); |
| pi2_dst[0] = i4_value; |
| |
| i4_value = (x0 - x2); |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, |
| pu1_nnz[plane]); |
| pi2_dst[2] = i4_value; |
| |
| i4_value = (x1 - x3); |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, |
| pu1_nnz[plane]); |
| pi2_dst[3] = i4_value; |
| |
| i4_value = (x1 + x3); |
| FWD_QUANT(i4_value, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, |
| pu1_nnz[plane]); |
| pi2_dst[1] = i4_value; |
| |
| pi2_dst += 4; |
| pi2_src += 4; |
| |
| } |
| } |
| |
| /* |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs Single stage forward transform CF8 and quantization on 8*8 blocks |
| * for h.264 |
| * |
| * @par Description: |
| * Performs single stage 8x8 forward transform CF8 after calculating the residue |
| * The result is then quantized |
| * |
| * @param[in] pu1_src |
| * Input 8x8 pixels |
| * |
| * @param[in] pu1_pred |
| * Input 8x8 pixels |
| * |
| * @param[in] pi1_out |
| * Output 8x8 pixels |
| * |
| * @param[in] u4_thresh |
| * Threshold under which the coeffs are not quantized |
| * |
| * @param[in] u4_qp_div |
| * QP/6 |
| * |
| * @param[in] u4_qp_rem |
| * QP%6 |
| * |
| * @param[in] u2_src_stride |
| * Source stride |
| * |
| * @param[in] pred_strd |
| * stride for prediciton buffer |
| * |
| * @param[in] dst_strd |
| * stride for destination buffer |
| * |
| * @param[in] pu4_quant_mat |
| * Pointer to the 4x4 quantization matrix |
| * |
| * @returns Void |
| * |
| * |
| ******************************************************************************* |
| */ |
| void ih264_resi_trans_quant_8x8(UWORD8 *pu1_src, |
| UWORD8 *pu1_pred, |
| WORD16 *pi2_out, |
| WORD32 src_strd, |
| WORD32 pred_strd, |
| const UWORD16 *pu2_scale_matrix, |
| const UWORD16 *pu2_threshold_matrix, |
| UWORD32 u4_qbits, |
| UWORD32 u4_round_factor, |
| UWORD8 *pu1_nnz, |
| WORD16 *pu1_dc_alt_addr) |
| |
| { |
| WORD16 *pi2_out_tmp = pi2_out; |
| UWORD32 i; |
| WORD32 a0, a1, a2, a3, a4, a5, a6, a7; |
| WORD32 r0, r1, r2, r3, r4, r5, r6, r7; |
| WORD32 i4_sign; |
| UWORD32 u4_abs_value; |
| UWORD32 u4_nonzero_coeff = 0; |
| |
| UNUSED(pu1_dc_alt_addr); |
| |
| /*Horizontal transform */ |
| /* we are going to use the a's and r's in a twisted way since */ |
| /*i dont want to declare more variables */ |
| for(i = 0; i < SUB_BLK_WIDTH_8x8; ++i) |
| { |
| r0 = pu1_src[0]; |
| r0 -= pu1_pred[0]; |
| r1 = pu1_src[1]; |
| r1 -= pu1_pred[1]; |
| r2 = pu1_src[2];r2 -= pu1_pred[2]; |
| r3 = pu1_src[3];r3 -= pu1_pred[3]; |
| r4 = pu1_src[4];r4 -= pu1_pred[4]; |
| r5 = pu1_src[5];r5 -= pu1_pred[5]; |
| r6 = pu1_src[6];r6 -= pu1_pred[6]; |
| r7 = pu1_src[7];r7 -= pu1_pred[7]; |
| |
| |
| a0 = r0 + r7; |
| a1 = r1 + r6; |
| a2 = r2 + r5; |
| a3 = r3 + r4; |
| |
| a4 = a0 + a3; |
| a5 = a1 + a2; |
| a6 = a0 - a3; |
| a7 = a1 - a2; |
| |
| pi2_out_tmp[0] = a4 + a5; |
| |
| pi2_out_tmp[2] = a6 + (a7>>1); |
| pi2_out_tmp[4] = a4 - a5; |
| pi2_out_tmp[6] = (a6>>1) - a7; |
| |
| a0 = r0 - r7; |
| a1 = r1 - r6; |
| a2 = r2 - r5; |
| a3 = r3 - r4; |
| |
| a4 = a1 + a2 + ((a0>>1) + a0); |
| a5 = a0 - a3 - ((a2>>1) + a2); |
| a6 = a0 + a3 - ((a1>>1) + a1); |
| a7 = a1 - a2 + ((a3>>1) + a3); |
| |
| pi2_out_tmp[1] = a4 + (a7>>2); |
| pi2_out_tmp[3] = a5 + (a6>>2); |
| pi2_out_tmp[5] = a6 - (a5>>2); |
| pi2_out_tmp[7] = (a4>>2) - a7; |
| |
| pu1_src += src_strd; |
| pu1_pred += pred_strd; |
| pi2_out_tmp += 8; |
| } |
| |
| /*vertical transform and quant */ |
| |
| pi2_out_tmp = pi2_out; |
| |
| for (i = 0; i < SUB_BLK_WIDTH_8x8; ++i) |
| { |
| |
| r0 = pi2_out_tmp[0]; |
| r1 = pi2_out_tmp[8]; |
| r2 = pi2_out_tmp[16]; |
| r3 = pi2_out_tmp[24]; |
| r4 = pi2_out_tmp[32]; |
| r5 = pi2_out_tmp[40]; |
| r6 = pi2_out_tmp[48]; |
| r7 = pi2_out_tmp[56]; |
| |
| a0 = r0 + r7; |
| a1 = r1 + r6; |
| a2 = r2 + r5; |
| a3 = r3 + r4; |
| |
| a4 = a0 + a3; |
| a5 = a1 + a2; |
| a6 = a0 - a3; |
| a7 = a1 - a2; |
| |
| a0 = r0 - r7; |
| a1 = r1 - r6; |
| a2 = r2 - r5; |
| a3 = r3 - r4; |
| |
| r0 = a4 + a5; |
| r2 = a6 + (a7>>1); |
| r4 = a4 - a5; |
| r6 = (a6>>1) - a7; |
| |
| a4 = a1 + a2 + ((a0>>1) + a0); |
| a5 = a0 - a3 - ((a2>>1) + a2); |
| a6 = a0 + a3 - ((a1>>1) + a1); |
| a7 = a1 - a2 + ((a3>>1) + a3); |
| |
| r1 = a4 + (a7>>2); |
| r3 = a5 + (a6>>2); |
| r5 = a6 - (a5>>2); |
| r7 = (a4>>2) - a7; |
| |
| FWD_QUANT(r0, u4_abs_value, i4_sign, pu2_threshold_matrix[0], |
| pu2_scale_matrix[0], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[0] = r0; |
| |
| FWD_QUANT(r1, u4_abs_value, i4_sign, pu2_threshold_matrix[8], |
| pu2_scale_matrix[8], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[8] = r1; |
| |
| FWD_QUANT(r2, u4_abs_value, i4_sign, pu2_threshold_matrix[16], |
| pu2_scale_matrix[16], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[16] = r2; |
| |
| FWD_QUANT(r3, u4_abs_value, i4_sign, pu2_threshold_matrix[24], |
| pu2_scale_matrix[24], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[24] = r3; |
| |
| FWD_QUANT(r4, u4_abs_value, i4_sign, pu2_threshold_matrix[32], |
| pu2_scale_matrix[32], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[32] = r4; |
| |
| FWD_QUANT(r5, u4_abs_value, i4_sign, pu2_threshold_matrix[40], |
| pu2_scale_matrix[40], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[40] = r5; |
| |
| FWD_QUANT(r6, u4_abs_value, i4_sign, pu2_threshold_matrix[48], |
| pu2_scale_matrix[48], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[48] = r6; |
| |
| FWD_QUANT(r7, u4_abs_value, i4_sign, pu2_threshold_matrix[56], |
| pu2_scale_matrix[56], u4_round_factor, u4_qbits, |
| u4_nonzero_coeff); |
| pi2_out_tmp[56] = r7; |
| |
| pi2_out_tmp++; |
| pu2_scale_matrix++; |
| pu2_threshold_matrix++; |
| } |
| /* Return total nonzero coefficients in the current sub block */ |
| *pu1_nnz = u4_nonzero_coeff; |
| } |
