FFmpeg
fixed_dsp.c
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1 /*
2  * Copyright (c) 2012
3  * MIPS Technologies, Inc., California.
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28  *
29  * Author: Nedeljko Babic (nedeljko.babic imgtec com)
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47 
48 #include "fixed_dsp.h"
49 
50 static void vector_fmul_add_c(int *dst, const int *src0, const int *src1, const int *src2, int len){
51  int i;
52  int64_t accu;
53 
54  for (i=0; i<len; i++) {
55  accu = (int64_t)src0[i] * src1[i];
56  dst[i] = src2[i] + (int)((accu + 0x40000000) >> 31);
57  }
58 }
59 
60 static void vector_fmul_reverse_c(int *dst, const int *src0, const int *src1, int len)
61 {
62  int i;
63  int64_t accu;
64 
65  src1 += len-1;
66  for (i=0; i<len; i++) {
67  accu = (int64_t)src0[i] * src1[-i];
68  dst[i] = (int)((accu+0x40000000) >> 31);
69  }
70 }
71 
72 static void vector_fmul_window_scaled_c(int16_t *dst, const int32_t *src0,
73  const int32_t *src1, const int32_t *win,
74  int len, uint8_t bits)
75 {
76  int32_t s0, s1, wi, wj, i,j, round;
77 
78  dst += len;
79  win += len;
80  src0+= len;
81  round = bits? 1 << (bits-1) : 0;
82 
83  for (i=-len, j=len-1; i<0; i++, j--) {
84  s0 = src0[i];
85  s1 = src1[j];
86  wi = win[i];
87  wj = win[j];
88  dst[i] = av_clip_int16(((((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31) + round) >> bits);
89  dst[j] = av_clip_int16(((((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31) + round) >> bits);
90  }
91 }
92 
93 static void vector_fmul_window_c(int32_t *dst, const int32_t *src0,
94  const int32_t *src1, const int32_t *win,
95  int len)
96 {
97  int32_t s0, s1, wi, wj, i, j;
98 
99  dst += len;
100  win += len;
101  src0+= len;
102 
103  for (i=-len, j=len-1; i<0; i++, j--) {
104  s0 = src0[i];
105  s1 = src1[j];
106  wi = win[i];
107  wj = win[j];
108  dst[i] = ((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31;
109  dst[j] = ((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31;
110  }
111 }
112 
113 static void vector_fmul_c(int *dst, const int *src0, const int *src1, int len)
114 {
115  int i;
116  int64_t accu;
117 
118  for (i = 0; i < len; i++){
119  accu = (int64_t)src0[i] * src1[i];
120  dst[i] = (int)((accu+0x40000000) >> 31);
121  }
122 }
123 
124 static int scalarproduct_fixed_c(const int *v1, const int *v2, int len)
125 {
126  /** p is initialized with 0x40000000 so that the proper rounding will occur
127  * at the end */
128  int64_t p = 0x40000000;
129  int i;
130 
131  for (i = 0; i < len; i++)
132  p += (int64_t)v1[i] * v2[i];
133 
134  return (int)(p >> 31);
135 }
136 
137 static void butterflies_fixed_c(int *v1, int *v2, int len)
138 {
139  int i;
140 
141  for (i = 0; i < len; i++){
142  int t = v1[i] - v2[i];
143  v1[i] += v2[i];
144  v2[i] = t;
145  }
146 }
147 
149 {
151 
152  if (!fdsp)
153  return NULL;
154 
157  fdsp->vector_fmul = vector_fmul_c;
162 
163  if (ARCH_X86)
164  ff_fixed_dsp_init_x86(fdsp);
165 
166  return fdsp;
167 }
#define NULL
Definition: coverity.c:32
static void vector_fmul_c(int *dst, const int *src0, const int *src1, int len)
Definition: fixed_dsp.c:113
static float win(SuperEqualizerContext *s, float n, int N)
static void vector_fmul_add_c(int *dst, const int *src0, const int *src1, const int *src2, int len)
Definition: fixed_dsp.c:50
void(* vector_fmul_add)(int *dst, const int *src0, const int *src1, const int *src2, int len)
Calculate the entry wise product of two vectors of integers, add a third vector of integers and store...
Definition: fixed_dsp.h:132
uint8_t
#define av_malloc(s)
void(* vector_fmul_reverse)(int *dst, const int *src0, const int *src1, int len)
Definition: fixed_dsp.h:116
static void vector_fmul_window_scaled_c(int16_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len, uint8_t bits)
Definition: fixed_dsp.c:72
void ff_fixed_dsp_init_x86(AVFixedDSPContext *fdsp)
int(* scalarproduct_fixed)(const int *v1, const int *v2, int len)
Calculate the scalar product of two vectors of integers.
Definition: fixed_dsp.h:144
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define s0
Definition: regdef.h:37
static av_always_inline av_const double round(double x)
Definition: libm.h:444
uint8_t bits
Definition: vp3data.h:202
static int scalarproduct_fixed_c(const int *v1, const int *v2, int len)
Definition: fixed_dsp.c:124
void(* butterflies_fixed)(int *av_restrict v1, int *av_restrict v2, int len)
Calculate the sum and difference of two vectors of integers.
Definition: fixed_dsp.h:153
static void vector_fmul_reverse_c(int *dst, const int *src0, const int *src1, int len)
Definition: fixed_dsp.c:60
int32_t
void(* vector_fmul_window)(int32_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len)
Overlap/add with window function.
Definition: fixed_dsp.h:98
#define src1
Definition: h264pred.c:139
void(* vector_fmul)(int *dst, const int *src0, const int *src1, int len)
Fixed-point multiplication that calculates the entry wise product of two vectors of integers and stor...
Definition: fixed_dsp.h:113
#define src0
Definition: h264pred.c:138
#define s1
Definition: regdef.h:38
AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact)
Allocate and initialize a fixed DSP context.
Definition: fixed_dsp.c:148
int
static void vector_fmul_window_c(int32_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len)
Definition: fixed_dsp.c:93
int len
static void butterflies_fixed_c(int *v1, int *v2, int len)
Definition: fixed_dsp.c:137
void(* vector_fmul_window_scaled)(int16_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len, uint8_t bits)
Overlap/add with window function.
Definition: fixed_dsp.h:80