FFmpeg
fixed_dsp.c
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1 /*
2  * Copyright (c) 2012
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29  * Author: Nedeljko Babic (nedeljko.babic imgtec com)
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47 
48 #include "common.h"
49 #include "fixed_dsp.h"
50 #include "mem.h"
51 
52 static void vector_fmul_add_c(int *dst, const int *src0, const int *src1, const int *src2, int len){
53  int i;
54  int64_t accu;
55 
56  for (i=0; i<len; i++) {
57  accu = (int64_t)src0[i] * src1[i];
58  dst[i] = src2[i] + (int)((accu + 0x40000000) >> 31);
59  }
60 }
61 
62 static void vector_fmul_reverse_c(int *dst, const int *src0, const int *src1, int len)
63 {
64  int i;
65  int64_t accu;
66 
67  src1 += len-1;
68  for (i=0; i<len; i++) {
69  accu = (int64_t)src0[i] * src1[-i];
70  dst[i] = (int)((accu+0x40000000) >> 31);
71  }
72 }
73 
74 static void vector_fmul_window_scaled_c(int16_t *dst, const int32_t *src0,
75  const int32_t *src1, const int32_t *win,
76  int len, uint8_t bits)
77 {
78  int32_t s0, s1, wi, wj, i,j, round;
79 
80  dst += len;
81  win += len;
82  src0+= len;
83  round = bits? 1 << (bits-1) : 0;
84 
85  for (i=-len, j=len-1; i<0; i++, j--) {
86  s0 = src0[i];
87  s1 = src1[j];
88  wi = win[i];
89  wj = win[j];
90  dst[i] = av_clip_int16(((((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31) + round) >> bits);
91  dst[j] = av_clip_int16(((((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31) + round) >> bits);
92  }
93 }
94 
96  const int32_t *src1, const int32_t *win,
97  int len)
98 {
99  int32_t s0, s1, wi, wj, i, j;
100 
101  dst += len;
102  win += len;
103  src0+= len;
104 
105  for (i=-len, j=len-1; i<0; i++, j--) {
106  s0 = src0[i];
107  s1 = src1[j];
108  wi = win[i];
109  wj = win[j];
110  dst[i] = ((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31;
111  dst[j] = ((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31;
112  }
113 }
114 
115 static void vector_fmul_c(int *dst, const int *src0, const int *src1, int len)
116 {
117  int i;
118  int64_t accu;
119 
120  for (i = 0; i < len; i++){
121  accu = (int64_t)src0[i] * src1[i];
122  dst[i] = (int)((accu+0x40000000) >> 31);
123  }
124 }
125 
126 static int scalarproduct_fixed_c(const int *v1, const int *v2, int len)
127 {
128  /** p is initialized with 0x40000000 so that the proper rounding will occur
129  * at the end */
130  int64_t p = 0x40000000;
131  int i;
132 
133  for (i = 0; i < len; i++)
134  p += (int64_t)v1[i] * v2[i];
135 
136  return (int)(p >> 31);
137 }
138 
139 static void butterflies_fixed_c(int *restrict v1s, int *restrict v2, int len)
140 {
141  int i;
142  unsigned int *v1 = v1s;
143 
144  for (i = 0; i < len; i++){
145  int t = v1[i] - v2[i];
146  v1[i] += v2[i];
147  v2[i] = t;
148  }
149 }
150 
152 {
154 
155  if (!fdsp)
156  return NULL;
157 
160  fdsp->vector_fmul = vector_fmul_c;
165 
166 #if ARCH_RISCV
168 #elif ARCH_X86
169  ff_fixed_dsp_init_x86(fdsp);
170 #endif
171 
172  return fdsp;
173 }
AVFixedDSPContext::butterflies_fixed
void(* butterflies_fixed)(int *restrict v1, int *restrict v2, int len)
Calculate the sum and difference of two vectors of integers.
Definition: fixed_dsp.h:152
src1
const pixel * src1
Definition: h264pred_template.c:421
int64_t
long long int64_t
Definition: coverity.c:34
vector_fmul_c
static void vector_fmul_c(int *dst, const int *src0, const int *src1, int len)
Definition: fixed_dsp.c:115
AVFixedDSPContext
Definition: fixed_dsp.h:55
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
win
static float win(SuperEqualizerContext *s, float n, int N)
Definition: af_superequalizer.c:119
AVFixedDSPContext::vector_fmul_add
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:131
ff_fixed_dsp_init_riscv
void ff_fixed_dsp_init_riscv(AVFixedDSPContext *fdsp)
Definition: fixed_dsp_init.c:43
butterflies_fixed_c
static void butterflies_fixed_c(int *restrict v1s, int *restrict v2, int len)
Definition: fixed_dsp.c:139
avpriv_alloc_fixed_dsp
AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact)
Allocate and initialize a fixed DSP context.
Definition: fixed_dsp.c:151
bits
uint8_t bits
Definition: vp3data.h:128
AVFixedDSPContext::scalarproduct_fixed
int(* scalarproduct_fixed)(const int *v1, const int *v2, int len)
Calculate the scalar product of two vectors of integers.
Definition: fixed_dsp.h:143
fixed_dsp.h
av_clip_int16
#define av_clip_int16
Definition: common.h:115
NULL
#define NULL
Definition: coverity.c:32
AVFixedDSPContext::vector_fmul_reverse
void(* vector_fmul_reverse)(int *dst, const int *src0, const int *src1, int len)
Definition: fixed_dsp.h:115
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
vector_fmul_reverse_c
static void vector_fmul_reverse_c(int *dst, const int *src0, const int *src1, int len)
Definition: fixed_dsp.c:62
vector_fmul_window_scaled_c
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:74
AVFixedDSPContext::vector_fmul
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:112
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
round
static av_always_inline av_const double round(double x)
Definition: libm.h:444
src2
const pixel * src2
Definition: h264pred_template.c:422
common.h
len
int len
Definition: vorbis_enc_data.h:426
vector_fmul_window_c
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:95
ff_fixed_dsp_init_x86
void ff_fixed_dsp_init_x86(AVFixedDSPContext *fdsp)
Definition: fixed_dsp_init.c:26
src0
const pixel *const src0
Definition: h264pred_template.c:420
mem.h
int32_t
int32_t
Definition: audioconvert.c:56
AVFixedDSPContext::vector_fmul_window_scaled
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:79
scalarproduct_fixed_c
static int scalarproduct_fixed_c(const int *v1, const int *v2, int len)
Definition: fixed_dsp.c:126
AVFixedDSPContext::vector_fmul_window
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:97
vector_fmul_add_c
static void vector_fmul_add_c(int *dst, const int *src0, const int *src1, const int *src2, int len)
Definition: fixed_dsp.c:52