49 double (*
const *
funcs1)(
void *,
double a);
51 double (*
const *
funcs2)(
void *,
double a,
double b);
65 .log_level_offset_offset = offsetof(
Parser, log_offset),
66 .parent_log_context_offset = offsetof(
Parser, log_ctx),
74 [
'y'-
'E']= { 8.271806125530276749e-25, 1e-24, -24 },
75 [
'z'-
'E']= { 8.4703294725430034e-22, 1e-21, -21 },
76 [
'a'-
'E']= { 8.6736173798840355e-19, 1e-18, -18 },
77 [
'f'-
'E']= { 8.8817841970012523e-16, 1e-15, -15 },
78 [
'p'-
'E']= { 9.0949470177292824e-13, 1e-12, -12 },
79 [
'n'-
'E']= { 9.3132257461547852e-10, 1e-9, -9 },
80 [
'u'-
'E']= { 9.5367431640625e-7, 1e-6, -6 },
81 [
'm'-
'E']= { 9.765625e-4, 1e-3, -3 },
82 [
'c'-
'E']= { 9.8431332023036951e-3, 1e-2, -2 },
83 [
'd'-
'E']= { 9.921256574801246e-2, 1e-1, -1 },
84 [
'h'-
'E']= { 1.0159366732596479e2, 1e2, 2 },
85 [
'k'-
'E']= { 1.024e3, 1e3, 3 },
86 [
'K'-
'E']= { 1.024e3, 1e3, 3 },
87 [
'M'-
'E']= { 1.048576e6, 1e6, 6 },
88 [
'G'-
'E']= { 1.073741824e9, 1e9, 9 },
89 [
'T'-
'E']= { 1.099511627776e12, 1e12, 12 },
90 [
'P'-
'E']= { 1.125899906842624e15, 1e15, 15 },
91 [
'E'-
'E']= { 1.152921504606847e18, 1e18, 18 },
92 [
'Z'-
'E']= { 1.1805916207174113e21, 1e21, 21 },
93 [
'Y'-
'E']= { 1.2089258196146292e24, 1e24, 24 },
110 if(numstr[0]==
'0' && (numstr[1]|0x20)==
'x') {
111 d = strtoul(numstr, &next, 16);
113 d =
strtod(numstr, &next);
116 if (next[0] ==
'd' && next[1] ==
'B') {
120 }
else if (*next >=
'E' && *next <=
'z') {
123 if (next[1] ==
'i') {
145 #define IS_IDENTIFIER_CHAR(c) ((c) - '0' <= 9U || (c) - 'a' <= 25U || (c) - 'A' <= 25U || (c) == '_')
150 for (
i=0; prefix[
i];
i++) {
151 if (prefix[
i] !=
s[
i])
return 0;
173 double (*
func2)(
void *, double, double);
224 return v0 + (v1 -
v0) *
f;
235 r=
r*1664525+1013904223;
237 return e->
value * (
r * (1.0/UINT64_MAX));
246 double t = 1, d = 0, v;
250 double var0 = p->
var[
id];
251 for(
i=0;
i<1000;
i++) {
265 double low = -1, high = -1, v, low_v = -DBL_MAX, high_v = DBL_MAX;
266 double var0 = p->
var[0];
268 for(
i=-1;
i<1024;
i++) {
272 p->
var[0] = x_max*pow(0.9,
i-255);
273 if (
i&1) p->
var[0] *= -1;
274 if (
i&2) p->
var[0] += low;
275 else p->
var[0] += high;
278 if (v<=0 && v>low_v) {
282 if (v>=0 && v<high_v) {
286 if (low>=0 && high>=0){
287 for (j=0; j<1000; j++) {
288 p->
var[0] = (low+high)*0.5;
289 if (low == p->
var[0] || high == p->
var[0])
292 if (v<=0) low = p->
var[0];
293 if (v>=0) high= p->
var[0];
303 return -low_v<high_v ? low : high;
311 case e_max:
return e->
value * (d > d2 ? d : d2);
312 case e_min:
return e->
value * (d < d2 ? d : d2);
313 case e_eq:
return e->
value * (d == d2 ? 1.0 : 0.0);
314 case e_gt:
return e->
value * (d > d2 ? 1.0 : 0.0);
315 case e_gte:
return e->
value * (d >= d2 ? 1.0 : 0.0);
316 case e_lt:
return e->
value * (d < d2 ? 1.0 : 0.0);
317 case e_lte:
return e->
value * (d <= d2 ? 1.0 : 0.0);
349 char *next = p->
s, *
s0 = p->
s;
385 p->
s= strchr(p->
s,
'(');
397 if (p->
s[0] !=
')') {
418 if (p->
s[0] !=
')') {
520 *sign= (*p->
s ==
'+') - (*p->
s ==
'-');
532 if (next != p->
s && next[0] ==
'd' && next[1] ==
'B') {
542 int sign, sign2, ret;
544 if ((ret =
parse_dB(&e0, p, &sign)) < 0)
549 if ((ret =
parse_dB(&e2, p, &sign2)) < 0) {
561 if (e0) e0->
value *= (sign|1);
573 while (p->
s[0]==
'*' || p->
s[0]==
'/') {
597 while (*p->
s ==
'+' || *p->
s ==
'-') {
625 while (*p->
s ==
';') {
688 const char *
const *
func2_names,
double (*
const *funcs2)(
void *,
double,
double),
689 int log_offset,
void *log_ctx)
744 if (!e || !counter || !
size)
779 const char *
const *
func2_names,
double (*
const *funcs2)(
void *,
double,
double),
780 void *opaque,
int log_offset,
void *log_ctx)
static const char *const func2_names[]
Macro definitions for various function/variable attributes.
Convenience header that includes libavutil's core.
common internal and external API header
#define FFDIFFSIGN(x, y)
Comparator.
static __device__ float ceil(float a)
static __device__ float fabs(float a)
static __device__ float floor(float a)
static __device__ float trunc(float a)
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
static int strmatch(const char *s, const char *prefix)
int av_expr_count_vars(AVExpr *e, unsigned *counter, int size)
Track the presence of variables and their number of occurrences in a parsed expression.
static int parse_pow(AVExpr **e, Parser *p, int *sign)
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
static int parse_primary(AVExpr **e, Parser *p)
static int parse_term(AVExpr **e, Parser *p)
static int parse_dB(AVExpr **e, Parser *p, int *sign)
double av_strtod(const char *numstr, char **tail)
Parse the string in numstr and return its value as a double.
#define IS_IDENTIFIER_CHAR(c)
static double etime(double v)
static const struct @291 constants[]
static int parse_subexpr(AVExpr **e, Parser *p)
static int parse_expr(AVExpr **e, Parser *p)
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
static double eval_expr(Parser *p, AVExpr *e)
static const struct @290 si_prefixes[ 'z' - 'E'+1]
static int parse_factor(AVExpr **e, Parser *p)
static int verify_expr(AVExpr *e)
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
static const AVClass eval_class
static int expr_count(AVExpr *e, unsigned *counter, int size, int type)
static AVExpr * make_eval_expr(int type, int value, AVExpr *p0, AVExpr *p1)
int av_expr_count_func(AVExpr *e, unsigned *counter, int size, int arg)
Track the presence of user provided functions and their number of occurrences in a parsed expression.
simple arithmetic expression evaluator
internal math functions header
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
#define AV_LOG_INFO
Standard information.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
const char * av_default_item_name(void *ptr)
Return the context name.
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
#define LIBAVUTIL_VERSION_INT
common internal API header
const uint8_t ff_reverse[256]
static av_const double hypot(double x, double y)
static av_always_inline av_const double round(double x)
#define FF_ARRAY_ELEMS(a)
double strtod(const char *, char **)
Describe the class of an AVClass context structure.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
double(* func1)(void *, double)
double(* func2)(void *, double, double)
double(*const funcs2)(void *, double a, double b)
const char *const * func2_names
const double * const_values
const char *const * func1_names
double(*const funcs1)(void *, double a)
const char *const * const_names
static const double const_values[]
static const char *const const_names[]
int64_t av_gettime(void)
Get the current time in microseconds.
static double(*const funcs1[])(void *, double)
static const char *const func1_names[]