From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Thu, 5 Sep 2013 17:57:22 +0100 Subject: making act segmenter --- ffmpeg/libavutil/eval.c | 854 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 854 insertions(+) create mode 100644 ffmpeg/libavutil/eval.c (limited to 'ffmpeg/libavutil/eval.c') diff --git a/ffmpeg/libavutil/eval.c b/ffmpeg/libavutil/eval.c new file mode 100644 index 0000000..9a688ae --- /dev/null +++ b/ffmpeg/libavutil/eval.c @@ -0,0 +1,854 @@ +/* + * Copyright (c) 2002-2006 Michael Niedermayer + * Copyright (c) 2006 Oded Shimon + * + * 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 +#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 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, + } 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_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 && vvar[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_vparam[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 { + 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 *new_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 v = 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 = new_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 = new_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 = new_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 = new_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])); + 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 = &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 + +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)", + 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 -- cgit v1.2.3