Merge commit '33b97faa'

* commit '33b97faa':
  vf_setpts: switch to an AVOptions-based system.

Conflicts:
	doc/filters.texi
	libavfilter/f_setpts.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/filters.texi

@@ -6712,8 +6712,17 @@ Change the PTS (presentation timestamp) of the input frames.
 
 @code{asetpts} works on audio frames, @code{setpts} on video frames.
 
-Accept in input an expression evaluated through the eval API, which
-can contain the following constants:
+This filter accepts the following options:
+
+@table @option
+
+@item expr
+The expression which is evaluated for each frame to construct its timestamp.
+
+@end table
+
+The expression is evaluated through the eval API and can contain the following
+constants:
 
 @table @option
 @item FRAME_RATE

libavfilter/avfilter.c

@@ -690,6 +690,7 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
         !strcmp(filter->filter->name, "pp"   )  ||
         !strcmp(filter->filter->name, "aperms") ||
         !strcmp(filter->filter->name, "resample") ||
+        !strcmp(filter->filter->name, "setpts"       ) ||
         !strcmp(filter->filter->name, "showspectrum") ||
         !strcmp(filter->filter->name, "silencedetect") ||
         !strcmp(filter->filter->name, "subtitles") ||

libavfilter/f_setpts.c

@@ -27,6 +27,7 @@
 #include "libavutil/eval.h"
 #include "libavutil/internal.h"
 #include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
 #include "libavutil/time.h"
 #include "avfilter.h"
 #include "internal.h"
@@ -78,6 +79,8 @@ enum var_name {
 };
 
 typedef struct {
+    const AVClass *class;
+    char *expr_str;
     AVExpr *expr;
     double var_values[VAR_VARS_NB];
     enum AVMediaType type;
@@ -88,9 +91,9 @@ static av_cold int init(AVFilterContext *ctx, const char *args)
     SetPTSContext *setpts = ctx->priv;
     int ret;
 
-    if ((ret = av_expr_parse(&setpts->expr, args ? args : "PTS",
+    if ((ret = av_expr_parse(&setpts->expr, setpts->expr_str,
                              var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
-        av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", args);
+        av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", setpts->expr_str);
         return ret;
     }
 
@@ -236,6 +239,21 @@ AVFilter avfilter_af_asetpts = {
 #endif /* CONFIG_ASETPTS_FILTER */
 
 #if CONFIG_SETPTS_FILTER
+
+#define OFFSET(x) offsetof(SetPTSContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption options[] = {
+    { "expr", "Expression determining the frame timestamp", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "PTS" }, .flags = FLAGS },
+    { NULL },
+};
+
+static const AVClass setpts_class = {
+    .class_name = "setpts",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
 static const AVFilterPad avfilter_vf_setpts_inputs[] = {
     {
         .name             = "default",
@@ -262,6 +280,7 @@ AVFilter avfilter_vf_setpts = {
     .uninit    = uninit,
 
     .priv_size = sizeof(SetPTSContext),
+    .priv_class = &setpts_class,
 
     .inputs    = avfilter_vf_setpts_inputs,
     .outputs   = avfilter_vf_setpts_outputs,