diff options
Diffstat (limited to 'libavutil/eval.c')
| -rw-r--r-- | libavutil/eval.c | 279 |
1 files changed, 227 insertions, 52 deletions
diff --git a/libavutil/eval.c b/libavutil/eval.c index b5d71c6000..7e866155db 100644 --- a/libavutil/eval.c +++ b/libavutil/eval.c @@ -2,20 +2,20 @@ * Copyright (c) 2002-2006 Michael Niedermayer <michaelni@gmx.at> * Copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -26,14 +26,19 @@ * 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 "ffmath.h" +#include "internal.h" #include "log.h" #include "mathematics.h" +#include "time.h" #include "avstring.h" #include "timer.h" +#include "reverse.h" typedef struct Parser { const AVClass *class; @@ -49,53 +54,70 @@ typedef struct Parser { int log_offset; void *log_ctx; #define VARS 10 - double var[VARS]; + 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 AVClass eval_class = { "Eval", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT, offsetof(Parser,log_offset), offsetof(Parser,log_ctx) }; + +static const struct { + double bin_val; + double dec_val; + int8_t exp; +} si_prefixes['z' - 'E' + 1] = { + ['y'-'E']= { 8.271806125530276749e-25, 1e-24, -24 }, + ['z'-'E']= { 8.4703294725430034e-22, 1e-21, -21 }, + ['a'-'E']= { 8.6736173798840355e-19, 1e-18, -18 }, + ['f'-'E']= { 8.8817841970012523e-16, 1e-15, -15 }, + ['p'-'E']= { 9.0949470177292824e-13, 1e-12, -12 }, + ['n'-'E']= { 9.3132257461547852e-10, 1e-9, -9 }, + ['u'-'E']= { 9.5367431640625e-7, 1e-6, -6 }, + ['m'-'E']= { 9.765625e-4, 1e-3, -3 }, + ['c'-'E']= { 9.8431332023036951e-3, 1e-2, -2 }, + ['d'-'E']= { 9.921256574801246e-2, 1e-1, -1 }, + ['h'-'E']= { 1.0159366732596479e2, 1e2, 2 }, + ['k'-'E']= { 1.024e3, 1e3, 3 }, + ['K'-'E']= { 1.024e3, 1e3, 3 }, + ['M'-'E']= { 1.048576e6, 1e6, 6 }, + ['G'-'E']= { 1.073741824e9, 1e9, 9 }, + ['T'-'E']= { 1.099511627776e12, 1e12, 12 }, + ['P'-'E']= { 1.125899906842624e15, 1e15, 15 }, + ['E'-'E']= { 1.152921504606847e18, 1e18, 18 }, + ['Z'-'E']= { 1.1805916207174113e21, 1e21, 21 }, + ['Y'-'E']= { 1.2089258196146292e24, 1e24, 24 }, +}; + +static const struct { + const char *name; + double value; +} constants[] = { + { "E", M_E }, + { "PI", M_PI }, + { "PHI", M_PHI }, + { "QP2LAMBDA", FF_QP2LAMBDA }, }; double av_strtod(const char *numstr, char **tail) { double d; char *next; - d = strtod(numstr, &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); + d = ff_exp10(d / 20); next += 2; } else if (*next >= 'E' && *next <= 'z') { - int e= si_prefixes[*next - 'E']; + int e= si_prefixes[*next - 'E'].exp; if (e) { if (next[1] == 'i') { - d*= pow( 2, e/0.3); + d*= si_prefixes[*next - 'E'].bin_val; next+=2; } else { - d*= pow(10, e); + d*= si_prefixes[*next - 'E'].dec_val; next++; } } @@ -129,10 +151,11 @@ 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_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_floor, e_ceil, e_trunc, - e_sqrt, e_not, + 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, e_clip, e_atan2 } type; double value; // is sign in other types union { @@ -141,9 +164,15 @@ struct AVExpr { double (*func1)(void *, double); double (*func2)(void *, double, double); } a; - struct AVExpr *param[2]; + 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) { @@ -161,29 +190,125 @@ static double eval_expr(Parser *p, AVExpr *e) 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_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_clip: { + double x = eval_expr(p, e->param[0]); + double min = eval_expr(p, e->param[1]), max = eval_expr(p, e->param[2]); + if (isnan(min) || isnan(max) || isnan(x) || min > max) + return NAN; + return e->value * av_clipd(eval_expr(p, e->param[0]), min, max); + } + 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] = ff_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(d/d2)*d2); + 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 * (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 * hypot(d, d2); + case e_atan2:return e->value * atan2(d, 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); } } } @@ -197,6 +322,8 @@ 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); } @@ -229,6 +356,15 @@ static int parse_primary(AVExpr **e, Parser *p) 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) { @@ -259,6 +395,10 @@ static int parse_primary(AVExpr **e, Parser *p) 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); @@ -279,6 +419,7 @@ static int parse_primary(AVExpr **e, Parser *p) 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; @@ -287,18 +428,32 @@ static int parse_primary(AVExpr **e, Parser *p) 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" )) { AVExpr *tmp = d->param[1]; d->param[1] = d->param[0]; d->param[0] = tmp; d->type = e_gte; } - else if (strmatch(next, "lt" )) { AVExpr *tmp = d->param[1]; d->param[1] = d->param[0]; d->param[0] = tmp; 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 if (strmatch(next, "clip" )) d->type = e_clip; + else if (strmatch(next, "atan2" )) d->type = e_atan2; else { for (i=0; p->func1_names && p->func1_names[i]; i++) { if (strmatch(next, p->func1_names[i])) { @@ -327,7 +482,7 @@ static int parse_primary(AVExpr **e, Parser *p) return 0; } -static AVExpr *new_eval_expr(int type, int value, AVExpr *p0, AVExpr *p1) +static AVExpr *make_eval_expr(int type, int value, AVExpr *p0, AVExpr *p1) { AVExpr *e = av_mallocz(sizeof(AVExpr)); if (!e) @@ -374,7 +529,7 @@ static int parse_factor(AVExpr **e, Parser *p) av_expr_free(e1); return ret; } - e0 = new_eval_expr(e_pow, 1, e1, e2); + e0 = make_eval_expr(e_pow, 1, e1, e2); if (!e0) { av_expr_free(e1); av_expr_free(e2); @@ -401,7 +556,7 @@ static int parse_term(AVExpr **e, Parser *p) av_expr_free(e1); return ret; } - e0 = new_eval_expr(c == '*' ? e_mul : e_div, 1, e1, e2); + e0 = make_eval_expr(c == '*' ? e_mul : e_div, 1, e1, e2); if (!e0) { av_expr_free(e1); av_expr_free(e2); @@ -424,7 +579,7 @@ static int parse_subexpr(AVExpr **e, Parser *p) av_expr_free(e1); return ret; } - e0 = new_eval_expr(e_add, 1, e1, e2); + e0 = make_eval_expr(e_add, 1, e1, e2); if (!e0) { av_expr_free(e1); av_expr_free(e2); @@ -453,7 +608,7 @@ static int parse_expr(AVExpr **e, Parser *p) av_expr_free(e1); return ret; } - e0 = new_eval_expr(e_last, 1, e1, e2); + e0 = make_eval_expr(e_last, 1, e1, e2); if (!e0) { av_expr_free(e1); av_expr_free(e2); @@ -484,8 +639,22 @@ static int verify_expr(AVExpr *e) case e_trunc: case e_sqrt: case e_not: - return verify_expr(e->param[0]); - default: return verify_expr(e->param[0]) && verify_expr(e->param[1]); + 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: + case e_clip: + 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]; } } @@ -509,7 +678,7 @@ int av_expr_parse(AVExpr **expr, const char *s, if (!av_isspace(*s++)) *wp++ = s[-1]; *wp++ = 0; - p.class = &class; + p.class = &eval_class; p.stack_index=100; p.s= w; p.const_names = const_names; @@ -523,18 +692,23 @@ int av_expr_parse(AVExpr **expr, const char *s, 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); + if (!e->var) { + ret = AVERROR(ENOMEM); + goto end; + } *expr = e; + e = NULL; end: + av_expr_free(e); av_free(w); return ret; } @@ -542,6 +716,7 @@ end: 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; |