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Diffstat (limited to 'ffmpeg/libavutil/eval.c')
| -rw-r--r-- | ffmpeg/libavutil/eval.c | 868 |
1 files changed, 0 insertions, 868 deletions
diff --git a/ffmpeg/libavutil/eval.c b/ffmpeg/libavutil/eval.c deleted file mode 100644 index 635e538..0000000 --- a/ffmpeg/libavutil/eval.c +++ /dev/null @@ -1,868 +0,0 @@ -/* - * Copyright (c) 2002-2006 Michael Niedermayer <michaelni@gmx.at> - * Copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org> - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * simple arithmetic expression evaluator. - * - * see http://joe.hotchkiss.com/programming/eval/eval.html - */ - -#include <float.h> -#include "attributes.h" -#include "avutil.h" -#include "common.h" -#include "eval.h" -#include "log.h" -#include "mathematics.h" -#include "time.h" -#include "avstring.h" - -typedef struct Parser { - const AVClass *class; - int stack_index; - char *s; - const double *const_values; - const char * const *const_names; // NULL terminated - double (* const *funcs1)(void *, double a); // NULL terminated - const char * const *func1_names; // NULL terminated - double (* const *funcs2)(void *, double a, double b); // NULL terminated - const char * const *func2_names; // NULL terminated - void *opaque; - int log_offset; - void *log_ctx; -#define VARS 10 - double *var; -} Parser; - -static const AVClass eval_class = { "Eval", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT, offsetof(Parser,log_offset), offsetof(Parser,log_ctx) }; - -static const int8_t si_prefixes['z' - 'E' + 1] = { - ['y'-'E']= -24, - ['z'-'E']= -21, - ['a'-'E']= -18, - ['f'-'E']= -15, - ['p'-'E']= -12, - ['n'-'E']= - 9, - ['u'-'E']= - 6, - ['m'-'E']= - 3, - ['c'-'E']= - 2, - ['d'-'E']= - 1, - ['h'-'E']= 2, - ['k'-'E']= 3, - ['K'-'E']= 3, - ['M'-'E']= 6, - ['G'-'E']= 9, - ['T'-'E']= 12, - ['P'-'E']= 15, - ['E'-'E']= 18, - ['Z'-'E']= 21, - ['Y'-'E']= 24, -}; - -static const struct { - const char *name; - double value; -} constants[] = { - { "E", M_E }, - { "PI", M_PI }, - { "PHI", M_PHI }, -}; - -double av_strtod(const char *numstr, char **tail) -{ - double d; - char *next; - if(numstr[0]=='0' && (numstr[1]|0x20)=='x') { - d = strtoul(numstr, &next, 16); - } else - d = strtod(numstr, &next); - /* if parsing succeeded, check for and interpret postfixes */ - if (next!=numstr) { - if (next[0] == 'd' && next[1] == 'B') { - /* treat dB as decibels instead of decibytes */ - d = pow(10, d / 20); - next += 2; - } else if (*next >= 'E' && *next <= 'z') { - int e= si_prefixes[*next - 'E']; - if (e) { - if (next[1] == 'i') { - d*= pow( 2, e/0.3); - next+=2; - } else { - d*= pow(10, e); - next++; - } - } - } - - if (*next=='B') { - d*=8; - next++; - } - } - /* if requested, fill in tail with the position after the last parsed - character */ - if (tail) - *tail = next; - return d; -} - -#define IS_IDENTIFIER_CHAR(c) ((c) - '0' <= 9U || (c) - 'a' <= 25U || (c) - 'A' <= 25U || (c) == '_') - -static int strmatch(const char *s, const char *prefix) -{ - int i; - for (i=0; prefix[i]; i++) { - if (prefix[i] != s[i]) return 0; - } - /* return 1 only if the s identifier is terminated */ - return !IS_IDENTIFIER_CHAR(s[i]); -} - -struct AVExpr { - enum { - e_value, e_const, e_func0, e_func1, e_func2, - e_squish, e_gauss, e_ld, e_isnan, e_isinf, - e_mod, e_max, e_min, e_eq, e_gt, e_gte, e_lte, e_lt, - e_pow, e_mul, e_div, e_add, - e_last, e_st, e_while, e_taylor, e_root, e_floor, e_ceil, e_trunc, - e_sqrt, e_not, e_random, e_hypot, e_gcd, - e_if, e_ifnot, e_print, e_bitand, e_bitor, e_between, - } type; - double value; // is sign in other types - union { - int const_index; - double (*func0)(double); - double (*func1)(void *, double); - double (*func2)(void *, double, double); - } a; - struct AVExpr *param[3]; - double *var; -}; - -static double etime(double v) -{ - return av_gettime() * 0.000001; -} - -static double eval_expr(Parser *p, AVExpr *e) -{ - switch (e->type) { - case e_value: return e->value; - case e_const: return e->value * p->const_values[e->a.const_index]; - case e_func0: return e->value * e->a.func0(eval_expr(p, e->param[0])); - case e_func1: return e->value * e->a.func1(p->opaque, eval_expr(p, e->param[0])); - case e_func2: return e->value * e->a.func2(p->opaque, eval_expr(p, e->param[0]), eval_expr(p, e->param[1])); - case e_squish: return 1/(1+exp(4*eval_expr(p, e->param[0]))); - case e_gauss: { double d = eval_expr(p, e->param[0]); return exp(-d*d/2)/sqrt(2*M_PI); } - case e_ld: return e->value * p->var[av_clip(eval_expr(p, e->param[0]), 0, VARS-1)]; - case e_isnan: return e->value * !!isnan(eval_expr(p, e->param[0])); - case e_isinf: return e->value * !!isinf(eval_expr(p, e->param[0])); - case e_floor: return e->value * floor(eval_expr(p, e->param[0])); - case e_ceil : return e->value * ceil (eval_expr(p, e->param[0])); - case e_trunc: return e->value * trunc(eval_expr(p, e->param[0])); - case e_sqrt: return e->value * sqrt (eval_expr(p, e->param[0])); - case e_not: return e->value * (eval_expr(p, e->param[0]) == 0); - case e_if: return e->value * (eval_expr(p, e->param[0]) ? eval_expr(p, e->param[1]) : - e->param[2] ? eval_expr(p, e->param[2]) : 0); - case e_ifnot: return e->value * (!eval_expr(p, e->param[0]) ? eval_expr(p, e->param[1]) : - e->param[2] ? eval_expr(p, e->param[2]) : 0); - case e_between: { - double d = eval_expr(p, e->param[0]); - return e->value * (d >= eval_expr(p, e->param[1]) && - d <= eval_expr(p, e->param[2])); - } - case e_print: { - double x = eval_expr(p, e->param[0]); - int level = e->param[1] ? av_clip(eval_expr(p, e->param[1]), INT_MIN, INT_MAX) : AV_LOG_INFO; - av_log(p, level, "%f\n", x); - return x; - } - case e_random:{ - int idx= av_clip(eval_expr(p, e->param[0]), 0, VARS-1); - uint64_t r= isnan(p->var[idx]) ? 0 : p->var[idx]; - r= r*1664525+1013904223; - p->var[idx]= r; - return e->value * (r * (1.0/UINT64_MAX)); - } - case e_while: { - double d = NAN; - while (eval_expr(p, e->param[0])) - d=eval_expr(p, e->param[1]); - return d; - } - case e_taylor: { - double t = 1, d = 0, v; - double x = eval_expr(p, e->param[1]); - int id = e->param[2] ? av_clip(eval_expr(p, e->param[2]), 0, VARS-1) : 0; - int i; - double var0 = p->var[id]; - for(i=0; i<1000; i++) { - double ld = d; - p->var[id] = i; - v = eval_expr(p, e->param[0]); - d += t*v; - if(ld==d && v) - break; - t *= x / (i+1); - } - p->var[id] = var0; - return d; - } - case e_root: { - int i, j; - double low = -1, high = -1, v, low_v = -DBL_MAX, high_v = DBL_MAX; - double var0 = p->var[0]; - double x_max = eval_expr(p, e->param[1]); - for(i=-1; i<1024; i++) { - if(i<255) { - p->var[0] = av_reverse[i&255]*x_max/255; - } else { - p->var[0] = x_max*pow(0.9, i-255); - if (i&1) p->var[0] *= -1; - if (i&2) p->var[0] += low; - else p->var[0] += high; - } - v = eval_expr(p, e->param[0]); - if (v<=0 && v>low_v) { - low = p->var[0]; - low_v = v; - } - if (v>=0 && v<high_v) { - high = p->var[0]; - high_v = v; - } - if (low>=0 && high>=0){ - for (j=0; j<1000; j++) { - p->var[0] = (low+high)*0.5; - if (low == p->var[0] || high == p->var[0]) - break; - v = eval_expr(p, e->param[0]); - if (v<=0) low = p->var[0]; - if (v>=0) high= p->var[0]; - if (isnan(v)) { - low = high = v; - break; - } - } - break; - } - } - p->var[0] = var0; - return -low_v<high_v ? low : high; - } - default: { - double d = eval_expr(p, e->param[0]); - double d2 = eval_expr(p, e->param[1]); - switch (e->type) { - case e_mod: return e->value * (d - floor((!CONFIG_FTRAPV || d2) ? d / d2 : d * INFINITY) * d2); - case e_gcd: return e->value * av_gcd(d,d2); - case e_max: return e->value * (d > d2 ? d : d2); - case e_min: return e->value * (d < d2 ? d : d2); - case e_eq: return e->value * (d == d2 ? 1.0 : 0.0); - case e_gt: return e->value * (d > d2 ? 1.0 : 0.0); - case e_gte: return e->value * (d >= d2 ? 1.0 : 0.0); - case e_lt: return e->value * (d < d2 ? 1.0 : 0.0); - case e_lte: return e->value * (d <= d2 ? 1.0 : 0.0); - case e_pow: return e->value * pow(d, d2); - case e_mul: return e->value * (d * d2); - case e_div: return e->value * ((!CONFIG_FTRAPV || d2 ) ? (d / d2) : d * INFINITY); - case e_add: return e->value * (d + d2); - case e_last:return e->value * d2; - case e_st : return e->value * (p->var[av_clip(d, 0, VARS-1)]= d2); - case e_hypot:return e->value * (sqrt(d*d + d2*d2)); - case e_bitand: return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d & (long int)d2); - case e_bitor: return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d | (long int)d2); - } - } - } - return NAN; -} - -static int parse_expr(AVExpr **e, Parser *p); - -void av_expr_free(AVExpr *e) -{ - if (!e) return; - av_expr_free(e->param[0]); - av_expr_free(e->param[1]); - av_expr_free(e->param[2]); - av_freep(&e->var); - av_freep(&e); -} - -static int parse_primary(AVExpr **e, Parser *p) -{ - AVExpr *d = av_mallocz(sizeof(AVExpr)); - char *next = p->s, *s0 = p->s; - int ret, i; - - if (!d) - return AVERROR(ENOMEM); - - /* number */ - d->value = av_strtod(p->s, &next); - if (next != p->s) { - d->type = e_value; - p->s= next; - *e = d; - return 0; - } - d->value = 1; - - /* named constants */ - for (i=0; p->const_names && p->const_names[i]; i++) { - if (strmatch(p->s, p->const_names[i])) { - p->s+= strlen(p->const_names[i]); - d->type = e_const; - d->a.const_index = i; - *e = d; - return 0; - } - } - for (i = 0; i < FF_ARRAY_ELEMS(constants); i++) { - if (strmatch(p->s, constants[i].name)) { - p->s += strlen(constants[i].name); - d->type = e_value; - d->value = constants[i].value; - *e = d; - return 0; - } - } - - p->s= strchr(p->s, '('); - if (p->s==NULL) { - av_log(p, AV_LOG_ERROR, "Undefined constant or missing '(' in '%s'\n", s0); - p->s= next; - av_expr_free(d); - return AVERROR(EINVAL); - } - p->s++; // "(" - if (*next == '(') { // special case do-nothing - av_freep(&d); - if ((ret = parse_expr(&d, p)) < 0) - return ret; - if (p->s[0] != ')') { - av_log(p, AV_LOG_ERROR, "Missing ')' in '%s'\n", s0); - av_expr_free(d); - return AVERROR(EINVAL); - } - p->s++; // ")" - *e = d; - return 0; - } - if ((ret = parse_expr(&(d->param[0]), p)) < 0) { - av_expr_free(d); - return ret; - } - if (p->s[0]== ',') { - p->s++; // "," - parse_expr(&d->param[1], p); - } - if (p->s[0]== ',') { - p->s++; // "," - parse_expr(&d->param[2], p); - } - if (p->s[0] != ')') { - av_log(p, AV_LOG_ERROR, "Missing ')' or too many args in '%s'\n", s0); - av_expr_free(d); - return AVERROR(EINVAL); - } - p->s++; // ")" - - d->type = e_func0; - if (strmatch(next, "sinh" )) d->a.func0 = sinh; - else if (strmatch(next, "cosh" )) d->a.func0 = cosh; - else if (strmatch(next, "tanh" )) d->a.func0 = tanh; - else if (strmatch(next, "sin" )) d->a.func0 = sin; - else if (strmatch(next, "cos" )) d->a.func0 = cos; - else if (strmatch(next, "tan" )) d->a.func0 = tan; - else if (strmatch(next, "atan" )) d->a.func0 = atan; - else if (strmatch(next, "asin" )) d->a.func0 = asin; - else if (strmatch(next, "acos" )) d->a.func0 = acos; - else if (strmatch(next, "exp" )) d->a.func0 = exp; - else if (strmatch(next, "log" )) d->a.func0 = log; - else if (strmatch(next, "abs" )) d->a.func0 = fabs; - else if (strmatch(next, "time" )) d->a.func0 = etime; - else if (strmatch(next, "squish")) d->type = e_squish; - else if (strmatch(next, "gauss" )) d->type = e_gauss; - else if (strmatch(next, "mod" )) d->type = e_mod; - else if (strmatch(next, "max" )) d->type = e_max; - else if (strmatch(next, "min" )) d->type = e_min; - else if (strmatch(next, "eq" )) d->type = e_eq; - else if (strmatch(next, "gte" )) d->type = e_gte; - else if (strmatch(next, "gt" )) d->type = e_gt; - else if (strmatch(next, "lte" )) d->type = e_lte; - else if (strmatch(next, "lt" )) d->type = e_lt; - else if (strmatch(next, "ld" )) d->type = e_ld; - else if (strmatch(next, "isnan" )) d->type = e_isnan; - else if (strmatch(next, "isinf" )) d->type = e_isinf; - else if (strmatch(next, "st" )) d->type = e_st; - else if (strmatch(next, "while" )) d->type = e_while; - else if (strmatch(next, "taylor")) d->type = e_taylor; - else if (strmatch(next, "root" )) d->type = e_root; - else if (strmatch(next, "floor" )) d->type = e_floor; - else if (strmatch(next, "ceil" )) d->type = e_ceil; - else if (strmatch(next, "trunc" )) d->type = e_trunc; - else if (strmatch(next, "sqrt" )) d->type = e_sqrt; - else if (strmatch(next, "not" )) d->type = e_not; - else if (strmatch(next, "pow" )) d->type = e_pow; - else if (strmatch(next, "print" )) d->type = e_print; - else if (strmatch(next, "random")) d->type = e_random; - else if (strmatch(next, "hypot" )) d->type = e_hypot; - else if (strmatch(next, "gcd" )) d->type = e_gcd; - else if (strmatch(next, "if" )) d->type = e_if; - else if (strmatch(next, "ifnot" )) d->type = e_ifnot; - else if (strmatch(next, "bitand")) d->type = e_bitand; - else if (strmatch(next, "bitor" )) d->type = e_bitor; - else if (strmatch(next, "between"))d->type = e_between; - else { - for (i=0; p->func1_names && p->func1_names[i]; i++) { - if (strmatch(next, p->func1_names[i])) { - d->a.func1 = p->funcs1[i]; - d->type = e_func1; - *e = d; - return 0; - } - } - - for (i=0; p->func2_names && p->func2_names[i]; i++) { - if (strmatch(next, p->func2_names[i])) { - d->a.func2 = p->funcs2[i]; - d->type = e_func2; - *e = d; - return 0; - } - } - - av_log(p, AV_LOG_ERROR, "Unknown function in '%s'\n", s0); - av_expr_free(d); - return AVERROR(EINVAL); - } - - *e = d; - return 0; -} - -static AVExpr *make_eval_expr(int type, int value, AVExpr *p0, AVExpr *p1) -{ - AVExpr *e = av_mallocz(sizeof(AVExpr)); - if (!e) - return NULL; - e->type =type ; - e->value =value ; - e->param[0] =p0 ; - e->param[1] =p1 ; - return e; -} - -static int parse_pow(AVExpr **e, Parser *p, int *sign) -{ - *sign= (*p->s == '+') - (*p->s == '-'); - p->s += *sign&1; - return parse_primary(e, p); -} - -static int parse_dB(AVExpr **e, Parser *p, int *sign) -{ - /* do not filter out the negative sign when parsing a dB value. - for example, -3dB is not the same as -(3dB) */ - if (*p->s == '-') { - char *next; - double av_unused ignored = strtod(p->s, &next); - if (next != p->s && next[0] == 'd' && next[1] == 'B') { - *sign = 0; - return parse_primary(e, p); - } - } - return parse_pow(e, p, sign); -} - -static int parse_factor(AVExpr **e, Parser *p) -{ - int sign, sign2, ret; - AVExpr *e0, *e1, *e2; - if ((ret = parse_dB(&e0, p, &sign)) < 0) - return ret; - while(p->s[0]=='^'){ - e1 = e0; - p->s++; - if ((ret = parse_dB(&e2, p, &sign2)) < 0) { - av_expr_free(e1); - return ret; - } - e0 = make_eval_expr(e_pow, 1, e1, e2); - if (!e0) { - av_expr_free(e1); - av_expr_free(e2); - return AVERROR(ENOMEM); - } - if (e0->param[1]) e0->param[1]->value *= (sign2|1); - } - if (e0) e0->value *= (sign|1); - - *e = e0; - return 0; -} - -static int parse_term(AVExpr **e, Parser *p) -{ - int ret; - AVExpr *e0, *e1, *e2; - if ((ret = parse_factor(&e0, p)) < 0) - return ret; - while (p->s[0]=='*' || p->s[0]=='/') { - int c= *p->s++; - e1 = e0; - if ((ret = parse_factor(&e2, p)) < 0) { - av_expr_free(e1); - return ret; - } - e0 = make_eval_expr(c == '*' ? e_mul : e_div, 1, e1, e2); - if (!e0) { - av_expr_free(e1); - av_expr_free(e2); - return AVERROR(ENOMEM); - } - } - *e = e0; - return 0; -} - -static int parse_subexpr(AVExpr **e, Parser *p) -{ - int ret; - AVExpr *e0, *e1, *e2; - if ((ret = parse_term(&e0, p)) < 0) - return ret; - while (*p->s == '+' || *p->s == '-') { - e1 = e0; - if ((ret = parse_term(&e2, p)) < 0) { - av_expr_free(e1); - return ret; - } - e0 = make_eval_expr(e_add, 1, e1, e2); - if (!e0) { - av_expr_free(e1); - av_expr_free(e2); - return AVERROR(ENOMEM); - } - }; - - *e = e0; - return 0; -} - -static int parse_expr(AVExpr **e, Parser *p) -{ - int ret; - AVExpr *e0, *e1, *e2; - if (p->stack_index <= 0) //protect against stack overflows - return AVERROR(EINVAL); - p->stack_index--; - - if ((ret = parse_subexpr(&e0, p)) < 0) - return ret; - while (*p->s == ';') { - p->s++; - e1 = e0; - if ((ret = parse_subexpr(&e2, p)) < 0) { - av_expr_free(e1); - return ret; - } - e0 = make_eval_expr(e_last, 1, e1, e2); - if (!e0) { - av_expr_free(e1); - av_expr_free(e2); - return AVERROR(ENOMEM); - } - }; - - p->stack_index++; - *e = e0; - return 0; -} - -static int verify_expr(AVExpr *e) -{ - if (!e) return 0; - switch (e->type) { - case e_value: - case e_const: return 1; - case e_func0: - case e_func1: - case e_squish: - case e_ld: - case e_gauss: - case e_isnan: - case e_isinf: - case e_floor: - case e_ceil: - case e_trunc: - case e_sqrt: - case e_not: - case e_random: - return verify_expr(e->param[0]) && !e->param[1]; - case e_print: - return verify_expr(e->param[0]) - && (!e->param[1] || verify_expr(e->param[1])); - case e_if: - case e_ifnot: - case e_taylor: - return verify_expr(e->param[0]) && verify_expr(e->param[1]) - && (!e->param[2] || verify_expr(e->param[2])); - case e_between: - return verify_expr(e->param[0]) && - verify_expr(e->param[1]) && - verify_expr(e->param[2]); - default: return verify_expr(e->param[0]) && verify_expr(e->param[1]) && !e->param[2]; - } -} - -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) -{ - Parser p = { 0 }; - AVExpr *e = NULL; - char *w = av_malloc(strlen(s) + 1); - char *wp = w; - const char *s0 = s; - int ret = 0; - - if (!w) - return AVERROR(ENOMEM); - - while (*s) - if (!av_isspace(*s++)) *wp++ = s[-1]; - *wp++ = 0; - - p.class = &eval_class; - p.stack_index=100; - p.s= w; - p.const_names = const_names; - p.funcs1 = funcs1; - p.func1_names = func1_names; - p.funcs2 = funcs2; - p.func2_names = func2_names; - p.log_offset = log_offset; - p.log_ctx = log_ctx; - - if ((ret = parse_expr(&e, &p)) < 0) - goto end; - if (*p.s) { - av_expr_free(e); - av_log(&p, AV_LOG_ERROR, "Invalid chars '%s' at the end of expression '%s'\n", p.s, s0); - ret = AVERROR(EINVAL); - goto end; - } - if (!verify_expr(e)) { - av_expr_free(e); - ret = AVERROR(EINVAL); - goto end; - } - e->var= av_mallocz(sizeof(double) *VARS); - *expr = e; -end: - av_free(w); - return ret; -} - -double av_expr_eval(AVExpr *e, const double *const_values, void *opaque) -{ - Parser p = { 0 }; - p.var= e->var; - - p.const_values = const_values; - p.opaque = opaque; - return eval_expr(&p, e); -} - -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) -{ - AVExpr *e = NULL; - int ret = av_expr_parse(&e, s, const_names, func1_names, funcs1, func2_names, funcs2, log_offset, log_ctx); - - if (ret < 0) { - *d = NAN; - return ret; - } - *d = av_expr_eval(e, const_values, opaque); - av_expr_free(e); - return isnan(*d) ? AVERROR(EINVAL) : 0; -} - -#ifdef TEST -#include <string.h> - -static const double const_values[] = { - M_PI, - M_E, - 0 -}; - -static const char *const const_names[] = { - "PI", - "E", - 0 -}; - -int main(int argc, char **argv) -{ - int i; - double d; - const char *const *expr; - static const char *const exprs[] = { - "", - "1;2", - "-20", - "-PI", - "+PI", - "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", - "80G/80Gi", - "1k", - "1Gi", - "1gi", - "1GiFoo", - "1k+1k", - "1Gi*3foo", - "foo", - "foo(", - "foo()", - "foo)", - "sin", - "sin(", - "sin()", - "sin)", - "sin 10", - "sin(1,2,3)", - "sin(1 )", - "1", - "1foo", - "bar + PI + E + 100f*2 + foo", - "13k + 12f - foo(1, 2)", - "1gi", - "1Gi", - "st(0, 123)", - "st(1, 123); ld(1)", - "lte(0, 1)", - "lte(1, 1)", - "lte(1, 0)", - "lt(0, 1)", - "lt(1, 1)", - "gt(1, 0)", - "gt(2, 7)", - "gte(122, 122)", - /* compute 1+2+...+N */ - "st(0, 1); while(lte(ld(0), 100), st(1, ld(1)+ld(0));st(0, ld(0)+1)); ld(1)", - /* compute Fib(N) */ - "st(1, 1); st(2, 2); st(0, 1); while(lte(ld(0),10), st(3, ld(1)+ld(2)); st(1, ld(2)); st(2, ld(3)); st(0, ld(0)+1)); ld(3)", - "while(0, 10)", - "st(0, 1); while(lte(ld(0),100), st(1, ld(1)+ld(0)); st(0, ld(0)+1))", - "isnan(1)", - "isnan(NAN)", - "isnan(INF)", - "isinf(1)", - "isinf(NAN)", - "isinf(INF)", - "floor(NAN)", - "floor(123.123)", - "floor(-123.123)", - "trunc(123.123)", - "trunc(-123.123)", - "ceil(123.123)", - "ceil(-123.123)", - "sqrt(1764)", - "isnan(sqrt(-1))", - "not(1)", - "not(NAN)", - "not(0)", - "6.0206dB", - "-3.0103dB", - "pow(0,1.23)", - "pow(PI,1.23)", - "PI^1.23", - "pow(-1,1.23)", - "if(1, 2)", - "if(1, 1, 2)", - "if(0, 1, 2)", - "ifnot(0, 23)", - "ifnot(1, NaN) + if(0, 1)", - "ifnot(1, 1, 2)", - "ifnot(0, 1, 2)", - "taylor(1, 1)", - "taylor(eq(mod(ld(1),4),1)-eq(mod(ld(1),4),3), PI/2, 1)", - "root(sin(ld(0))-1, 2)", - "root(sin(ld(0))+6+sin(ld(0)/12)-log(ld(0)), 100)", - "7000000B*random(0)", - "squish(2)", - "gauss(0.1)", - "hypot(4,3)", - "gcd(30,55)*print(min(9,1))", - "bitor(42, 12)", - "bitand(42, 12)", - "bitand(NAN, 1)", - "between(10, -3, 10)", - "between(-4, -2, -1)", - "between(1,2)", - NULL - }; - - for (expr = exprs; *expr; expr++) { - printf("Evaluating '%s'\n", *expr); - av_expr_parse_and_eval(&d, *expr, - const_names, const_values, - NULL, NULL, NULL, NULL, NULL, 0, NULL); - if (isnan(d)) - printf("'%s' -> nan\n\n", *expr); - else - printf("'%s' -> %f\n\n", *expr, d); - } - - av_expr_parse_and_eval(&d, "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", - const_names, const_values, - NULL, NULL, NULL, NULL, NULL, 0, NULL); - printf("%f == 12.7\n", d); - av_expr_parse_and_eval(&d, "80G/80Gi", - const_names, const_values, - NULL, NULL, NULL, NULL, NULL, 0, NULL); - printf("%f == 0.931322575\n", d); - - if (argc > 1 && !strcmp(argv[1], "-t")) { - for (i = 0; i < 1050; i++) { - START_TIMER; - av_expr_parse_and_eval(&d, "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", - const_names, const_values, - NULL, NULL, NULL, NULL, NULL, 0, NULL); - STOP_TIMER("av_expr_parse_and_eval"); - } - } - - return 0; -} -#endif |