[FFmpeg-cvslog] eval: print() support
Michael Niedermayer
git at videolan.org
Sun Feb 17 17:37:15 CET 2013
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Jan 25 17:51:56 2013 +0100| [09ece9fa6c454e7c039990363a0fbe838d68d5c1] | committer: Michael Niedermayer
eval: print() support
This allows printing values via av_log from expressions.
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=09ece9fa6c454e7c039990363a0fbe838d68d5c1
---
doc/eval.texi | 8 ++++++++
libavutil/eval.c | 12 +++++++++++-
libavutil/version.h | 2 +-
3 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/doc/eval.texi b/doc/eval.texi
index 9b98c18..3b7964c 100644
--- a/doc/eval.texi
+++ b/doc/eval.texi
@@ -124,6 +124,14 @@ Return 1.0 if @var{expr} is zero, 0.0 otherwise.
Compute the power of @var{x} elevated @var{y}, it is equivalent to
"(@var{x})^(@var{y})".
+ at item print(t)
+ at item print(t, l)
+Print the value of expression @var{t} with loglevel @var{l}. If
+ at var{l} is not specified then a default log level is used.
+Returns the value of the expression printed.
+
+Prints t with loglevel l
+
@item random(x)
Return a pseudo random value between 0.0 and 1.0. @var{x} is the index of the
internal variable which will be used to save the seed/state.
diff --git a/libavutil/eval.c b/libavutil/eval.c
index 712d2f2..f940e9a 100644
--- a/libavutil/eval.c
+++ b/libavutil/eval.c
@@ -144,7 +144,7 @@ struct AVExpr {
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_if, e_ifnot, e_print,
} type;
double value; // is sign in other types
union {
@@ -184,6 +184,12 @@ static double eval_expr(Parser *p, AVExpr *e)
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];
@@ -409,6 +415,7 @@ static int parse_primary(AVExpr **e, Parser *p)
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;
@@ -601,6 +608,9 @@ static int verify_expr(AVExpr *e)
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:
diff --git a/libavutil/version.h b/libavutil/version.h
index 3d53261..3b5c04d 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -76,7 +76,7 @@
#define LIBAVUTIL_VERSION_MAJOR 52
#define LIBAVUTIL_VERSION_MINOR 17
-#define LIBAVUTIL_VERSION_MICRO 101
+#define LIBAVUTIL_VERSION_MICRO 102
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \
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