Fix compilation with --disable-everything --enable-outdev=alsa.

[ffmpeg] / libavfilter / vf_pad.c

diff --git a/libavfilter/vf_pad.c b/libavfilter/vf_pad.c
index 0ca5bd08fc4a70d84a16f0bdd296af5250a9e80f..c4edc23cc5e85a29ccca049c665febbed4d0ff6a 100644 (file)
--- a/libavfilter/vf_pad.c
+++ b/libavfilter/vf_pad.c
@@ -32,6 +32,7 @@
 #include "libavutil/avassert.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/parseutils.h"
+#include "libavutil/mathematics.h"
 #include "drawutils.h"
 
 static const char *var_names[] = {
@@ -45,6 +46,8 @@ static const char *var_names[] = {
     "x",
     "y",
     "a",
+    "sar",
+    "dar",
     "hsub",
     "vsub",
     NULL
@@ -61,6 +64,8 @@ enum var_name {
     VAR_X,
     VAR_Y,
     VAR_A,
+    VAR_SAR,
+    VAR_DAR,
     VAR_HSUB,
     VAR_VSUB,
     VARS_NB
@@ -156,8 +161,11 @@ static int config_input(AVFilterLink *inlink)
     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_SAR]   = inlink->sample_aspect_ratio.num ?
+        (float) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
+    var_values[VAR_DAR]   = var_values[VAR_A] * var_values[VAR_SAR];
     var_values[VAR_HSUB]  = 1<<pad->hsub;
-    var_values[VAR_VSUB]  = 2<<pad->vsub;
+    var_values[VAR_VSUB]  = 1<<pad->vsub;
 
     /* evaluate width and height */
     av_expr_parse_and_eval(&res, (expr = pad->w_expr),