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lavfi/setfield: add support to named options and introspection

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This commit is contained in:
Stefano Sabatini 2012-12-08 17:35:37 +01:00
parent 0110108a7c
commit 642a60f1c2
3 changed files with 32 additions and 26 deletions
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5
doc/filters.texi
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@ -3632,7 +3632,10 @@ output frames. It does not change the input frame, but only sets the
corresponding property, which affects how the frame is treated by
following filters (e.g. @code{fieldorder} or @code{yadif}).
It accepts a string parameter, which can assume the following values:
This filter accepts a single option @option{mode}, which can be
specified either by setting @code{mode=VALUE} either setting the
value alone. Available values are:
@table @samp
@item auto
Keep the same field property.

2
libavfilter/version.h
View File

@ -30,7 +30,7 @@
#define LIBAVFILTER_VERSION_MAJOR 3
#define LIBAVFILTER_VERSION_MINOR 26
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_MICRO 101
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \

49
libavfilter/vf_setfield.c
View File

@ -23,6 +23,7 @@
* set field order
*/
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
@ -35,39 +36,39 @@ enum SetFieldMode {
};
typedef struct {
const AVClass *class;
enum SetFieldMode mode;
} SetFieldContext;
#define OFFSET(x) offsetof(SetFieldContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption setfield_options[] = {
{"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_AUTO}, -1, MODE_PROG, FLAGS, "mode"},
{"auto", "keep the same input field", 0, AV_OPT_TYPE_CONST, {.i64=MODE_AUTO}, INT_MIN, INT_MAX, FLAGS, "mode"},
{"bff", "mark as bottom-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_BFF}, INT_MIN, INT_MAX, FLAGS, "mode"},
{"tff", "mark as top-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_TFF}, INT_MIN, INT_MAX, FLAGS, "mode"},
{"prog", "mark as progressive", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PROG}, INT_MIN, INT_MAX, FLAGS, "mode"},
{NULL}
};
AVFILTER_DEFINE_CLASS(setfield);
static av_cold int init(AVFilterContext *ctx, const char *args)
{
SetFieldContext *setfield = ctx->priv;
static const char *shorthand[] = { "mode", NULL };
setfield->mode = MODE_AUTO;
setfield->class = &setfield_class;
av_opt_set_defaults(setfield);
if (args) {
char c;
if (sscanf(args, "%d%c", &setfield->mode, &c) != 1) {
if (!strcmp("tff", args)) setfield->mode = MODE_TFF;
else if (!strcmp("bff", args)) setfield->mode = MODE_BFF;
else if (!strcmp("prog", args)) setfield->mode = MODE_PROG;
else if (!strcmp("auto", args)) setfield->mode = MODE_AUTO;
else {
av_log(ctx, AV_LOG_ERROR, "Invalid argument '%s'\n", args);
return AVERROR(EINVAL);
}
} else {
if (setfield->mode < -1 || setfield->mode > 1) {
av_log(ctx, AV_LOG_ERROR,
"Provided integer value %d must be included between -1 and +1\n",
setfield->mode);
return AVERROR(EINVAL);
}
av_log(ctx, AV_LOG_WARNING,
"Using -1/0/1 is deprecated, use auto/tff/bff/prog\n");
}
return av_opt_set_from_string(setfield, args, shorthand, "=", ":");
}
return 0;
static av_cold void uninit(AVFilterContext *ctx)
{
SetFieldContext *setfield = ctx->priv;
av_opt_free(setfield);
}
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
@ -105,8 +106,10 @@ AVFilter avfilter_vf_setfield = {
.name = "setfield",
.description = NULL_IF_CONFIG_SMALL("Force field for the output video frame."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(SetFieldContext),
.inputs = setfield_inputs,
.outputs = setfield_outputs,
.priv_class = &setfield_class,
};