1 /******************************************************************************
2 *
3 * Copyright (C) 2015 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 /**
21 *******************************************************************************
22 * @file
23 * ih264_ihadamard_scaling_ssse3.c
24 *
25 * @brief
26 * Contains definition of functions for h264 inverse hadamard 4x4 transform and scaling
27 *
28 * @author
29 * Mohit
30 *
31 * @par List of Functions:
32 * - ih264_ihadamard_scaling_4x4_ssse3()
33 *
34 * @remarks
35 *
36 *******************************************************************************
37 */
38 /*****************************************************************************/
39 /* File Includes */
40 /*****************************************************************************/
41
42 /* User include files */
43 #include "ih264_typedefs.h"
44 #include "ih264_defs.h"
45 #include "ih264_trans_macros.h"
46 #include "ih264_macros.h"
47 #include "ih264_trans_data.h"
48 #include "ih264_size_defs.h"
49 #include "ih264_structs.h"
50 #include "ih264_trans_quant_itrans_iquant.h"
51 #include <immintrin.h>
52
53 /*
54 ********************************************************************************
55 *
56 * @brief This function performs a 4x4 inverse hadamard transform on the 4x4 DC coefficients
57 * of a 16x16 intra prediction macroblock, and then performs scaling.
58 * prediction buffer
59 *
60 * @par Description:
61 * The DC coefficients pass through a 2-stage inverse hadamard transform.
62 * This inverse transformed content is scaled to based on Qp value.
63 *
64 * @param[in] pi2_src
65 * input 4x4 block of DC coefficients
66 *
67 * @param[out] pi2_out
68 * output 4x4 block
69 *
70 * @param[in] pu2_iscal_mat
71 * pointer to scaling list
72 *
73 * @param[in] pu2_weigh_mat
74 * pointer to weight matrix
75 *
76 * @param[in] u4_qp_div_6
77 * Floor (qp/6)
78 *
79 * @param[in] pi4_tmp
80 * temporary buffer of size 1*16
81 *
82 * @returns none
83 *
84 * @remarks none
85 *
86 *******************************************************************************
87 */
ih264_ihadamard_scaling_4x4_ssse3(WORD16 * pi2_src,WORD16 * pi2_out,const UWORD16 * pu2_iscal_mat,const UWORD16 * pu2_weigh_mat,UWORD32 u4_qp_div_6,WORD32 * pi4_tmp)88 void ih264_ihadamard_scaling_4x4_ssse3(WORD16* pi2_src,
89 WORD16* pi2_out,
90 const UWORD16 *pu2_iscal_mat,
91 const UWORD16 *pu2_weigh_mat,
92 UWORD32 u4_qp_div_6,
93 WORD32* pi4_tmp)
94 {
95 int val = 0xFFFF;
96 __m128i src_r0_r1, src_r2_r3, sign_reg, zero_8x16b = _mm_setzero_si128();
97 __m128i src_r0, src_r1, src_r2, src_r3;
98 __m128i temp0, temp1, temp2, temp3;
99 __m128i add_rshift = _mm_set1_epi32((1 << (5 - u4_qp_div_6)));
100 __m128i mult_val = _mm_set1_epi32(pu2_iscal_mat[0] * pu2_weigh_mat[0]);
101
102 __m128i mask = _mm_set1_epi32(val);
103 UNUSED (pi4_tmp);
104
105 mult_val = _mm_and_si128(mult_val, mask);
106
107 src_r0_r1 = _mm_loadu_si128((__m128i *) (pi2_src)); //a00 a01 a02 a03 a10 a11 a12 a13 -- the source matrix 0th,1st row
108 src_r2_r3 = _mm_loadu_si128((__m128i *) (pi2_src + 8)); //a20 a21 a22 a23 a30 a31 a32 a33 -- the source matrix 2nd,3rd row
109 sign_reg = _mm_cmpgt_epi16(zero_8x16b, src_r0_r1);
110 src_r0 = _mm_unpacklo_epi16(src_r0_r1, sign_reg);
111 src_r1 = _mm_unpackhi_epi16(src_r0_r1, sign_reg);
112 sign_reg = _mm_cmpgt_epi16(zero_8x16b, src_r2_r3);
113 src_r2 = _mm_unpacklo_epi16(src_r2_r3, sign_reg);
114 src_r3 = _mm_unpackhi_epi16(src_r2_r3, sign_reg);
115
116 /* Perform Inverse transform */
117 /*-------------------------------------------------------------*/
118 /* IDCT [ Horizontal transformation ] */
119 /*-------------------------------------------------------------*/
120 // Matrix transpose
121 /*
122 * a0 a1 a2 a3
123 * b0 b1 b2 b3
124 * c0 c1 c2 c3
125 * d0 d1 d2 d3
126 */
127 temp0 = _mm_unpacklo_epi32(src_r0, src_r1); //a0 b0 a1 b1
128 temp2 = _mm_unpacklo_epi32(src_r2, src_r3); //c0 d0 c1 d1
129 temp1 = _mm_unpackhi_epi32(src_r0, src_r1); //a2 b2 a3 b3
130 temp3 = _mm_unpackhi_epi32(src_r2, src_r3); //c2 d2 c3 d3
131 src_r0 = _mm_unpacklo_epi64(temp0, temp2); //a0 b0 c0 d0
132 src_r1 = _mm_unpackhi_epi64(temp0, temp2); //a1 b1 c1 d1
133 src_r2 = _mm_unpacklo_epi64(temp1, temp3); //a2 b2 c2 d2
134 src_r3 = _mm_unpackhi_epi64(temp1, temp3); //a3 b3 c3 d3
135
136 temp0 = _mm_add_epi32(src_r0, src_r3);
137 temp1 = _mm_add_epi32(src_r1, src_r2);
138 temp2 = _mm_sub_epi32(src_r1, src_r2);
139 temp3 = _mm_sub_epi32(src_r0, src_r3);
140
141 src_r0 = _mm_add_epi32(temp0, temp1);
142 src_r1 = _mm_add_epi32(temp2, temp3);
143 src_r2 = _mm_sub_epi32(temp0, temp1);
144 src_r3 = _mm_sub_epi32(temp3, temp2);
145
146 /*-------------------------------------------------------------*/
147 /* IDCT [ Vertical transformation ] */
148 /*-------------------------------------------------------------*/
149 // Matrix transpose
150 /*
151 * a0 b0 c0 d0
152 * a1 b1 c1 d1
153 * a2 b2 c2 d2
154 * a3 b3 c3 d3
155 */
156 temp0 = _mm_unpacklo_epi32(src_r0, src_r1); //a0 a1 b0 b1
157 temp2 = _mm_unpacklo_epi32(src_r2, src_r3); //a2 a3 b2 b3
158 temp1 = _mm_unpackhi_epi32(src_r0, src_r1); //c0 c1 d0 d1
159 temp3 = _mm_unpackhi_epi32(src_r2, src_r3); //c2 c3 d2 d3
160 src_r0 = _mm_unpacklo_epi64(temp0, temp2); //a0 a1 a2 a3
161 src_r1 = _mm_unpackhi_epi64(temp0, temp2); //b0 b1 b2 b3
162 src_r2 = _mm_unpacklo_epi64(temp1, temp3); //c0 c1 c2 c3
163 src_r3 = _mm_unpackhi_epi64(temp1, temp3); //d0 d1 d2 d3
164
165 temp0 = _mm_add_epi32(src_r0, src_r3);
166 temp1 = _mm_add_epi32(src_r1, src_r2);
167 temp2 = _mm_sub_epi32(src_r1, src_r2);
168 temp3 = _mm_sub_epi32(src_r0, src_r3);
169
170 src_r0 = _mm_add_epi32(temp0, temp1);
171 src_r1 = _mm_add_epi32(temp2, temp3);
172 src_r2 = _mm_sub_epi32(temp0, temp1);
173 src_r3 = _mm_sub_epi32(temp3, temp2);
174
175 src_r0 = _mm_and_si128(src_r0, mask);
176 src_r1 = _mm_and_si128(src_r1, mask);
177 src_r2 = _mm_and_si128(src_r2, mask);
178 src_r3 = _mm_and_si128(src_r3, mask);
179
180 src_r0 = _mm_madd_epi16(src_r0, mult_val);
181 src_r1 = _mm_madd_epi16(src_r1, mult_val);
182 src_r2 = _mm_madd_epi16(src_r2, mult_val);
183 src_r3 = _mm_madd_epi16(src_r3, mult_val);
184
185 //Scaling
186 if(u4_qp_div_6 >= 6)
187 {
188 src_r0 = _mm_slli_epi32(src_r0, u4_qp_div_6 - 6);
189 src_r1 = _mm_slli_epi32(src_r1, u4_qp_div_6 - 6);
190 src_r2 = _mm_slli_epi32(src_r2, u4_qp_div_6 - 6);
191 src_r3 = _mm_slli_epi32(src_r3, u4_qp_div_6 - 6);
192 }
193 else
194 {
195 temp0 = _mm_add_epi32(src_r0, add_rshift);
196 temp1 = _mm_add_epi32(src_r1, add_rshift);
197 temp2 = _mm_add_epi32(src_r2, add_rshift);
198 temp3 = _mm_add_epi32(src_r3, add_rshift);
199 src_r0 = _mm_srai_epi32(temp0, 6 - u4_qp_div_6);
200 src_r1 = _mm_srai_epi32(temp1, 6 - u4_qp_div_6);
201 src_r2 = _mm_srai_epi32(temp2, 6 - u4_qp_div_6);
202 src_r3 = _mm_srai_epi32(temp3, 6 - u4_qp_div_6);
203 }
204 src_r0_r1 = _mm_packs_epi32(src_r0, src_r1);
205 src_r2_r3 = _mm_packs_epi32(src_r2, src_r3);
206
207 _mm_storeu_si128((__m128i *) (&pi2_out[0]), src_r0_r1);
208 _mm_storeu_si128((__m128i *) (&pi2_out[8]), src_r2_r3);
209 }
210