This filter is a simple wrapper around the LUT filter.
hqdn3d_filter_deps="gpl"
movie_filter_deps="avcodec avformat"
mp_filter_deps="gpl avcodec"
+negate_filter_deps="lut_filter"
ocv_filter_deps="libopencv"
scale_filter_deps="swscale"
yadif_filter_deps="gpl"
See also mplayer(1), @url{http://www.mplayerhq.hu/}.
+@section negate
+
+Negate input video.
+
+This filter accepts an integer in input, if non-zero it negates the
+alpha component (if available). The default value in input is 0.
+
@section noformat
Force libavfilter not to use any of the specified pixel formats for the
OBJS-$(CONFIG_LUTRGB_FILTER) += vf_lut.o
OBJS-$(CONFIG_LUTYUV_FILTER) += vf_lut.o
OBJS-$(CONFIG_MP_FILTER) += vf_mp.o
+OBJS-$(CONFIG_NEGATE_FILTER) += vf_lut.o
OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_NULL_FILTER) += vf_null.o
OBJS-$(CONFIG_OCV_FILTER) += vf_libopencv.o
REGISTER_FILTER (LUTRGB, lutrgb, vf);
REGISTER_FILTER (LUTYUV, lutyuv, vf);
REGISTER_FILTER (MP, mp, vf);
+ REGISTER_FILTER (NEGATE, negate, vf);
REGISTER_FILTER (NOFORMAT, noformat, vf);
REGISTER_FILTER (NULL, null, vf);
REGISTER_FILTER (OCV, ocv, vf);
#include "libavutil/samplefmt.h"
#define LIBAVFILTER_VERSION_MAJOR 2
-#define LIBAVFILTER_VERSION_MINOR 19
+#define LIBAVFILTER_VERSION_MINOR 20
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
int is_rgb, is_yuv;
int rgba_map[4];
int step;
+ int negate_alpha; /* only used by negate */
} LutContext;
#define Y 0
DEFINE_LUT_FILTER(lut, "Compute and apply a lookup table to the RGB/YUV input video.", init);
DEFINE_LUT_FILTER(lutyuv, "Compute and apply a lookup table to the YUV input video.", init);
DEFINE_LUT_FILTER(lutrgb, "Compute and apply a lookup table to the RGB input video.", init);
+
+#if CONFIG_NEGATE_FILTER
+
+static int negate_init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+ LutContext *lut = ctx->priv;
+ char lut_params[1024];
+
+ if (args)
+ sscanf(args, "%d", &lut->negate_alpha);
+
+ av_log(ctx, AV_LOG_INFO, "negate_alpha:%d\n", lut->negate_alpha);
+
+ snprintf(lut_params, sizeof(lut_params), "c0=negval:c1=negval:c2=negval:a=%s",
+ lut->negate_alpha ? "negval" : "val");
+
+ return init(ctx, lut_params, opaque);
+}
+
+DEFINE_LUT_FILTER(negate, "Negate input video.", negate_init);
+
+#endif