avfilter: add remap filter

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Changelog

@@ -21,6 +21,7 @@ version <next>:
 - ADPCM IMA DAT4 decoder
 - musx demuxer
 - aix demuxer
+- remap filter
 
 version 3.0:
 - Common Encryption (CENC) MP4 encoding and decoding support

doc/filters.texi

@@ -10419,6 +10419,18 @@ less than @code{0}, the filter will try to use a good random seed on a
 best effort basis.
 @end table
 
+@section remap
+
+Remap pixels using 2nd: Xmap and 3rd: Ymap input video stream.
+
+Destination pixel at position (X, Y) will be picked from source (x, y) position
+where x = Xmap(X, Y) and y = Ymap(X, Y). If mapping values are out of range, zero
+value for pixel will be used for destination pixel.
+
+Xmap and Ymap input video streams must be of same dimensions. Output video stream
+will have Xmap/Ymap video stream dimensions.
+Xmap and Ymap input video streams are 16bit depth, single channel.
+
 @section removegrain
 
 The removegrain filter is a spatial denoiser for progressive video.

libavfilter/Makefile

@@ -224,6 +224,7 @@ OBJS-$(CONFIG_PULLUP_FILTER)                 += vf_pullup.o
 OBJS-$(CONFIG_QP_FILTER)                     += vf_qp.o
 OBJS-$(CONFIG_RANDOM_FILTER)                 += vf_random.o
 OBJS-$(CONFIG_REALTIME_FILTER)               += f_realtime.o
+OBJS-$(CONFIG_REMAP_FILTER)                  += vf_remap.o framesync.o
 OBJS-$(CONFIG_REMOVEGRAIN_FILTER)            += vf_removegrain.o
 OBJS-$(CONFIG_REMOVELOGO_FILTER)             += bbox.o lswsutils.o lavfutils.o vf_removelogo.o
 OBJS-$(CONFIG_REPEATFIELDS_FILTER)           += vf_repeatfields.o

libavfilter/allfilters.c

@@ -244,6 +244,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(QP,             qp,             vf);
     REGISTER_FILTER(RANDOM,         random,         vf);
     REGISTER_FILTER(REALTIME,       realtime,       vf);
+    REGISTER_FILTER(REMAP,          remap,          vf);
     REGISTER_FILTER(REMOVEGRAIN,    removegrain,    vf);
     REGISTER_FILTER(REMOVELOGO,     removelogo,     vf);
     REGISTER_FILTER(REPEATFIELDS,   repeatfields,   vf);

libavfilter/version.h

@@ -30,8 +30,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR   6
-#define LIBAVFILTER_VERSION_MINOR  40
-#define LIBAVFILTER_VERSION_MICRO 102
+#define LIBAVFILTER_VERSION_MINOR  41
+#define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \