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lavfi/framestep: switch to an AVOptions-based system

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-04-11 00:03:23 +00:00
parent ac217bda30
commit f77db72965
3 changed files with 18 additions and 20 deletions
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10
doc/filters.texi
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@ -3216,10 +3216,14 @@ See also the @ref{setpts} filter.
@section framestep
Select one frame every N.
Select one frame every N-th frame.
This filter accepts in input a string representing a positive
integer. Default argument is @code{1}.
This filter accepts the following option:
@table @option
@item step
Select frame after every @code{step} frames.
Allowed values are positive integers higher than 0. Default value is @code{1}.
@end table
@anchor{frei0r}
@section frei0r

1
libavfilter/avfilter.c
View File

@ -677,6 +677,7 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
!strcmp(filter->filter->name, "field" ) ||
!strcmp(filter->filter->name, "fieldorder") ||
!strcmp(filter->filter->name, "fps" ) ||
!strcmp(filter->filter->name, "framestep" ) ||
!strcmp(filter->filter->name, "frei0r" ) ||
!strcmp(filter->filter->name, "frei0r_src") ||
!strcmp(filter->filter->name, "geq" ) ||

27
libavfilter/vf_framestep.c
View File

@ -23,32 +23,25 @@
* Daniele Fornighieri <guru AT digitalfantasy it>.
*/
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct {
const AVClass *class;
int frame_step, frame_count, frame_selected;
} FrameStepContext;
static av_cold int init(AVFilterContext *ctx, const char *args)
{
FrameStepContext *framestep = ctx->priv;
char *tailptr;
long int n = 1;
#define OFFSET(x) offsetof(FrameStepContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
if (args) {
n = strtol(args, &tailptr, 10);
if (*tailptr || n <= 0 || n >= INT_MAX) {
av_log(ctx, AV_LOG_ERROR,
"Invalid argument '%s', must be a positive integer <= INT_MAX\n", args);
return AVERROR(EINVAL);
}
}
static const AVOption framestep_options[] = {
{ "step", "set frame step", OFFSET(frame_step), AV_OPT_TYPE_INT, {.i64=1}, 1, INT_MAX, FLAGS},
{NULL},
};
framestep->frame_step = n;
return 0;
}
AVFILTER_DEFINE_CLASS(framestep);
static int config_output_props(AVFilterLink *outlink)
{
@ -117,8 +110,8 @@ static const AVFilterPad framestep_outputs[] = {
AVFilter avfilter_vf_framestep = {
.name = "framestep",
.description = NULL_IF_CONFIG_SMALL("Select one frame every N frames."),
.init = init,
.priv_size = sizeof(FrameStepContext),
.priv_class = &framestep_class,
.inputs = framestep_inputs,
.outputs = framestep_outputs,
};