Start seamcarving video filter. I'm commiting this mainly to get it in a...

Start seamcarving video filter. I'm commiting this mainly to get it in a windows build. This still needs some heavy optimisation, support for vertical resizing, colors and upscaling.

Sample command line for those who want to test: time ./vlc fake: --fake-file ~/images/NATURE-Fakarava_400x300.jpg --fake-fps 5 -I dummy --control rc -V x11 --video-filter seamcarving@s
You can change the croping by using commands like:
@s crop 200 (a crop value of 0 resets it to the default mode)

configure.ac

@@ -1194,7 +1194,7 @@ dnl
 VLC_ADD_PLUGINS([dummy logger memcpy])
 VLC_ADD_PLUGINS([mpgv mpga m4v m4a h264 vc1 ps pva avi asf mp4 rawdv rawvid nsv real aiff mjpeg demuxdump flacsys tta])
 VLC_ADD_PLUGINS([cvdsub svcdsub spudec subsdec dvbsub mpeg_audio lpcm a52 dts cinepak flac])
-VLC_ADD_PLUGINS([deinterlace invert adjust transform wave ripple psychedelic gradient motionblur rv32 rotate noise grain extract sharpen])
+VLC_ADD_PLUGINS([deinterlace invert adjust transform wave ripple psychedelic gradient motionblur rv32 rotate noise grain extract sharpen seamcarving])
 VLC_ADD_PLUGINS([converter_fixed mono])
 VLC_ADD_PLUGINS([trivial_resampler ugly_resampler])
 VLC_ADD_PLUGINS([trivial_channel_mixer trivial_mixer])

modules/video_filter/Modules.am

@@ -34,4 +34,5 @@ SOURCES_bluescreen = bluescreen.c
 SOURCES_alphamask = alphamask.c
 SOURCES_gaussianblur = gaussianblur.c
 SOURCES_grain = grain.c
+SOURCES_seamcarving = seamcarving.c
 noinst_HEADERS = filter_common.h