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vf_transpose: switch to an AVOptions-based system.

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This commit is contained in:
Anton Khirnov 2013-02-25 21:21:29 +01:00
parent ffea3b00c3
commit 0c2466dec7
2 changed files with 44 additions and 28 deletions
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20
doc/filters.texi
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@ -2107,11 +2107,19 @@ will create 5 copies of the input video.
Transpose rows with columns in the input video and optionally flip it.
It accepts a parameter representing an integer, which can assume the
values:
This filter accepts the following options:
@table @option
@item dir
The direction of the transpose.
@end table
The direction can assume the following values:
@table @samp
@item 0
@item cclock_flip
Rotate by 90 degrees counterclockwise and vertically flip (default), that is:
@example
L.R L.l
@ -2119,7 +2127,7 @@ L.R L.l
l.r R.r
@end example
@item 1
@item clock
Rotate by 90 degrees clockwise, that is:
@example
L.R l.L
@ -2127,7 +2135,7 @@ L.R l.L
l.r r.R
@end example
@item 2
@item cclock
Rotate by 90 degrees counterclockwise, that is:
@example
L.R R.r
@ -2135,7 +2143,7 @@ L.R R.r
l.r L.l
@end example
@item 3
@item clock_flip
Rotate by 90 degrees clockwise and vertically flip, that is:
@example
L.R r.R

52
libavfilter/vf_transpose.c
View File

@ -31,38 +31,27 @@
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
enum TransposeDir {
TRANSPOSE_CCLOCK_FLIP,
TRANSPOSE_CLOCK,
TRANSPOSE_CCLOCK,
TRANSPOSE_CLOCK_FLIP,
};
typedef struct {
const AVClass *class;
int hsub, vsub;
int pixsteps[4];
/* 0 Rotate by 90 degrees counterclockwise and vflip. */
/* 1 Rotate by 90 degrees clockwise. */
/* 2 Rotate by 90 degrees counterclockwise. */
/* 3 Rotate by 90 degrees clockwise and vflip. */
int dir;
enum TransposeDir dir;
} TransContext;
static av_cold int init(AVFilterContext *ctx, const char *args)
{
TransContext *trans = ctx->priv;
trans->dir = 0;
if (args)
sscanf(args, "%d", &trans->dir);
if (trans->dir < 0 || trans->dir > 3) {
av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
trans->dir);
return AVERROR(EINVAL);
}
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
enum AVPixelFormat pix_fmts[] = {
@ -198,6 +187,25 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
return ff_filter_frame(outlink, out);
}
#define OFFSET(x) offsetof(TransContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
static const AVOption options[] = {
{ "dir", "Transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP },
TRANSPOSE_CCLOCK_FLIP, TRANSPOSE_CLOCK_FLIP, FLAGS, "dir" },
{ "cclock_flip", "counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" },
{ "clock", "clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" },
{ "cclock", "counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" },
{ "clock_flip", "clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" },
{ NULL },
};
static const AVClass transpose_class = {
.class_name = "transpose",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad avfilter_vf_transpose_inputs[] = {
{
.name = "default",
@ -220,8 +228,8 @@ AVFilter avfilter_vf_transpose = {
.name = "transpose",
.description = NULL_IF_CONFIG_SMALL("Transpose input video."),
.init = init,
.priv_size = sizeof(TransContext),
.priv_class = &transpose_class,
.query_formats = query_formats,