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210 lines
7.9 KiB
210 lines
7.9 KiB
/******************************************************************************
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*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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/**
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*******************************************************************************
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* @file
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* ih264_ihadamard_scaling_ssse3.c
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*
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* @brief
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* Contains definition of functions for h264 inverse hadamard 4x4 transform and scaling
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*
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* @author
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* Mohit
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*
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* @par List of Functions:
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* - ih264_ihadamard_scaling_4x4_ssse3()
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*
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* @remarks
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*
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*******************************************************************************
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*/
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/*****************************************************************************/
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/* File Includes */
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/*****************************************************************************/
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/* User include files */
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#include "ih264_typedefs.h"
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#include "ih264_defs.h"
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#include "ih264_trans_macros.h"
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#include "ih264_macros.h"
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#include "ih264_trans_data.h"
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#include "ih264_size_defs.h"
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#include "ih264_structs.h"
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#include "ih264_trans_quant_itrans_iquant.h"
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#include <immintrin.h>
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/*
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********************************************************************************
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*
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* @brief This function performs a 4x4 inverse hadamard transform on the 4x4 DC coefficients
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* of a 16x16 intra prediction macroblock, and then performs scaling.
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* prediction buffer
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*
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* @par Description:
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* The DC coefficients pass through a 2-stage inverse hadamard transform.
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* This inverse transformed content is scaled to based on Qp value.
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*
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* @param[in] pi2_src
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* input 4x4 block of DC coefficients
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*
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* @param[out] pi2_out
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* output 4x4 block
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*
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* @param[in] pu2_iscal_mat
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* pointer to scaling list
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*
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* @param[in] pu2_weigh_mat
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* pointer to weight matrix
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*
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* @param[in] u4_qp_div_6
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* Floor (qp/6)
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*
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* @param[in] pi4_tmp
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* temporary buffer of size 1*16
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*
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* @returns none
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*
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* @remarks none
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*
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*******************************************************************************
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*/
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void ih264_ihadamard_scaling_4x4_ssse3(WORD16* pi2_src,
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WORD16* pi2_out,
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const UWORD16 *pu2_iscal_mat,
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const UWORD16 *pu2_weigh_mat,
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UWORD32 u4_qp_div_6,
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WORD32* pi4_tmp)
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{
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int val = 0xFFFF;
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__m128i src_r0_r1, src_r2_r3, sign_reg, zero_8x16b = _mm_setzero_si128();
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__m128i src_r0, src_r1, src_r2, src_r3;
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__m128i temp0, temp1, temp2, temp3;
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__m128i add_rshift = _mm_set1_epi32((u4_qp_div_6 < 6) ? (1 << (5 - u4_qp_div_6)) : 0);
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__m128i mult_val = _mm_set1_epi32(pu2_iscal_mat[0] * pu2_weigh_mat[0]);
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__m128i mask = _mm_set1_epi32(val);
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UNUSED (pi4_tmp);
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mult_val = _mm_and_si128(mult_val, mask);
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src_r0_r1 = _mm_loadu_si128((__m128i *) (pi2_src)); //a00 a01 a02 a03 a10 a11 a12 a13 -- the source matrix 0th,1st row
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src_r2_r3 = _mm_loadu_si128((__m128i *) (pi2_src + 8)); //a20 a21 a22 a23 a30 a31 a32 a33 -- the source matrix 2nd,3rd row
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sign_reg = _mm_cmpgt_epi16(zero_8x16b, src_r0_r1);
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src_r0 = _mm_unpacklo_epi16(src_r0_r1, sign_reg);
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src_r1 = _mm_unpackhi_epi16(src_r0_r1, sign_reg);
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sign_reg = _mm_cmpgt_epi16(zero_8x16b, src_r2_r3);
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src_r2 = _mm_unpacklo_epi16(src_r2_r3, sign_reg);
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src_r3 = _mm_unpackhi_epi16(src_r2_r3, sign_reg);
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/* Perform Inverse transform */
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/*-------------------------------------------------------------*/
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/* IDCT [ Horizontal transformation ] */
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/*-------------------------------------------------------------*/
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// Matrix transpose
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/*
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* a0 a1 a2 a3
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* b0 b1 b2 b3
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* c0 c1 c2 c3
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* d0 d1 d2 d3
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*/
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temp0 = _mm_unpacklo_epi32(src_r0, src_r1); //a0 b0 a1 b1
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temp2 = _mm_unpacklo_epi32(src_r2, src_r3); //c0 d0 c1 d1
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temp1 = _mm_unpackhi_epi32(src_r0, src_r1); //a2 b2 a3 b3
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temp3 = _mm_unpackhi_epi32(src_r2, src_r3); //c2 d2 c3 d3
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src_r0 = _mm_unpacklo_epi64(temp0, temp2); //a0 b0 c0 d0
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src_r1 = _mm_unpackhi_epi64(temp0, temp2); //a1 b1 c1 d1
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src_r2 = _mm_unpacklo_epi64(temp1, temp3); //a2 b2 c2 d2
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src_r3 = _mm_unpackhi_epi64(temp1, temp3); //a3 b3 c3 d3
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temp0 = _mm_add_epi32(src_r0, src_r3);
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temp1 = _mm_add_epi32(src_r1, src_r2);
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temp2 = _mm_sub_epi32(src_r1, src_r2);
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temp3 = _mm_sub_epi32(src_r0, src_r3);
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src_r0 = _mm_add_epi32(temp0, temp1);
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src_r1 = _mm_add_epi32(temp2, temp3);
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src_r2 = _mm_sub_epi32(temp0, temp1);
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src_r3 = _mm_sub_epi32(temp3, temp2);
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/*-------------------------------------------------------------*/
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/* IDCT [ Vertical transformation ] */
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/*-------------------------------------------------------------*/
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// Matrix transpose
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/*
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* a0 b0 c0 d0
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* a1 b1 c1 d1
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* a2 b2 c2 d2
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* a3 b3 c3 d3
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*/
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temp0 = _mm_unpacklo_epi32(src_r0, src_r1); //a0 a1 b0 b1
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temp2 = _mm_unpacklo_epi32(src_r2, src_r3); //a2 a3 b2 b3
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temp1 = _mm_unpackhi_epi32(src_r0, src_r1); //c0 c1 d0 d1
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temp3 = _mm_unpackhi_epi32(src_r2, src_r3); //c2 c3 d2 d3
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src_r0 = _mm_unpacklo_epi64(temp0, temp2); //a0 a1 a2 a3
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src_r1 = _mm_unpackhi_epi64(temp0, temp2); //b0 b1 b2 b3
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src_r2 = _mm_unpacklo_epi64(temp1, temp3); //c0 c1 c2 c3
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src_r3 = _mm_unpackhi_epi64(temp1, temp3); //d0 d1 d2 d3
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temp0 = _mm_add_epi32(src_r0, src_r3);
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temp1 = _mm_add_epi32(src_r1, src_r2);
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temp2 = _mm_sub_epi32(src_r1, src_r2);
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temp3 = _mm_sub_epi32(src_r0, src_r3);
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src_r0 = _mm_add_epi32(temp0, temp1);
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src_r1 = _mm_add_epi32(temp2, temp3);
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src_r2 = _mm_sub_epi32(temp0, temp1);
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src_r3 = _mm_sub_epi32(temp3, temp2);
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src_r0 = _mm_and_si128(src_r0, mask);
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src_r1 = _mm_and_si128(src_r1, mask);
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src_r2 = _mm_and_si128(src_r2, mask);
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src_r3 = _mm_and_si128(src_r3, mask);
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src_r0 = _mm_madd_epi16(src_r0, mult_val);
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src_r1 = _mm_madd_epi16(src_r1, mult_val);
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src_r2 = _mm_madd_epi16(src_r2, mult_val);
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src_r3 = _mm_madd_epi16(src_r3, mult_val);
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//Scaling
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if(u4_qp_div_6 >= 6)
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{
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src_r0 = _mm_slli_epi32(src_r0, u4_qp_div_6 - 6);
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src_r1 = _mm_slli_epi32(src_r1, u4_qp_div_6 - 6);
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src_r2 = _mm_slli_epi32(src_r2, u4_qp_div_6 - 6);
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src_r3 = _mm_slli_epi32(src_r3, u4_qp_div_6 - 6);
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}
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else
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{
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temp0 = _mm_add_epi32(src_r0, add_rshift);
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temp1 = _mm_add_epi32(src_r1, add_rshift);
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temp2 = _mm_add_epi32(src_r2, add_rshift);
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temp3 = _mm_add_epi32(src_r3, add_rshift);
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src_r0 = _mm_srai_epi32(temp0, 6 - u4_qp_div_6);
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src_r1 = _mm_srai_epi32(temp1, 6 - u4_qp_div_6);
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src_r2 = _mm_srai_epi32(temp2, 6 - u4_qp_div_6);
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src_r3 = _mm_srai_epi32(temp3, 6 - u4_qp_div_6);
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}
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src_r0_r1 = _mm_packs_epi32(src_r0, src_r1);
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src_r2_r3 = _mm_packs_epi32(src_r2, src_r3);
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_mm_storeu_si128((__m128i *) (&pi2_out[0]), src_r0_r1);
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_mm_storeu_si128((__m128i *) (&pi2_out[8]), src_r2_r3);
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}
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