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vf_pad: add support for a "sar" variable

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Also add a "dar" alias for "a", for avoiding confusion with sar/dar.
This commit is contained in:
Stefano Sabatini 2011-07-02 17:31:18 +02:00
parent 01151a26c0
commit 0bf02fb1ea
3 changed files with 12 additions and 5 deletions
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5
doc/filters.texi
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@ -1129,9 +1129,12 @@ same as @var{out_w} and @var{out_h}
x and y offsets as specified by the @var{x} and @var{y}
expressions, or NAN if not yet specified
@item a
@item dar, a
input display aspect ratio, same as @var{iw} / @var{ih}
@item sar
input sample aspect ratio
@item hsub, vsub
horizontal and vertical chroma subsample values. For example for the
pixel format "yuv422p" @var{hsub} is 2 and @var{vsub} is 1.

2
libavfilter/avfilter.h
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@ -30,7 +30,7 @@
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 24
#define LIBAVFILTER_VERSION_MICRO 2
#define LIBAVFILTER_VERSION_MICRO 3
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \

10
libavfilter/vf_pad.c
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@ -45,7 +45,8 @@ static const char *var_names[] = {
"out_h", "oh",
"x",
"y",
"a",
"a", "dar",
"sar",
"hsub",
"vsub",
NULL
@ -61,7 +62,8 @@ enum var_name {
VAR_OUT_H, VAR_OH,
VAR_X,
VAR_Y,
VAR_A,
VAR_A, VAR_DAR,
VAR_SAR,
VAR_HSUB,
VAR_VSUB,
VARS_NB
@ -156,7 +158,9 @@ static int config_input(AVFilterLink *inlink)
var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
var_values[VAR_A] = (float) inlink->w / inlink->h;
var_values[VAR_DAR] = var_values[VAR_A] = (float) inlink->w / inlink->h;
var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
(float) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
var_values[VAR_HSUB] = 1<<pad->hsub;
var_values[VAR_VSUB] = 2<<pad->vsub;