Remove useless video filters

Most of these have very limited actual use, or are even entirely
useless. They only serve to bloat the codebase and to make life harder.
Drowning users in tons of barely useful filters isn't exactly helpful
either. Some of these filters were redundant or marked as obsolete.

The dlopen and lua (to be added soon) video filters provide ways to add
custom filters.

Detailed listing for each filter with reasons (with contributions from
divVerent and lachs0r):

1bpp:
    Replaced by "scale".
2xsai:
    Pixel art scaling algorithm, useless with lossy video.
blackframe:
    Not very useful. Apparently one use is combining it with scripts,
    that pass the
bmovl:
    Weirdly complex and insane (using FIFO commands), questionable use.
cropdetect:
    Only sort-of useful when used with scripts, and then it will be
    very fragile.
    It's probably better to use the dlopen rectangle filter, or to
    implement the common use-case in a better way.
decimate:
    Not needed/useful with modern video codecs, is an
    encoding-only filter.
denoise3d:
    "hqdn3d" is better.
detc:
    Some of the worse deteleciners.
dint:
    Useless, actually crashes. (On an assert in vf.c that is disabled
    by default in mplayer-svn.)
dvbscale:
    Not even practical, and the same effect can be achieved through
    other means.
eq:
    Worse/older version of eq2.
field:
    Limited use, available as dlopen filter.
fil:
    Quoting the manpage:
        This filter is very similar to the il filter but much faster,
        the main disadvantage is that it does not always work.
        Especially if combined with other filters it may produce
        randomly messed up images, so be happy if it works but do not
        complain if it does not for your combination of filters.
filmdint:
    Kind of redundant with pullup, and slightly worse.
fixpts:
    Never useful. (Most if not all filters have been fixed for PTS.)
framestep:
    Questionable use. For things like creating thumbnails, ffmpeg or
    --sstep should be used.
geq:
    Limited use, will be redundant with the "lua" filter.
halfpack:
    Useless, probably redundant with "scale".
harddup:
    Useless.
hue:
    Most VOs support this.
il:
    Useless.
ivtc:
    Another of the worse deteleciners.
kerndeint:
    A bad deinterlacer.
lavc:
    For DVB output devices. We removed that support.
lavcdeint:
    A bad deinterlacer, was already deprecated.
    Still available as --vf=pp=fd.
mcdeint:
    A broken deinterlacer that uses lavc internals.
ow:
    Very slow, barely any quality benefit over "hqdn3d".
palette:
    Done by "scale".
perspective:
    Files with incorrect perspective are extremely rare. About the
    only real-world use for this is keystone correction, which is
    usually done in hardware by the projector or by graphics
    drivers/compositors.
pp7:
    Another useless postprocessing filter with bad and complicated code.
    Use libpostprocess with "pp" instead.
qp:
    Useless.
remove-logo:
    Redundant with delogo, which is better and more practical.
rgbtest:
    Useless.
sab, smartblur, boxblur:
    Blur filters, redundant to "unsharp".
softskip:
    Does nothing.
spp, fspp, uspp:
    Useless postprocessing filters. "spp" needs ffmpeg internals.
    "fspp" is the optimized version of the "spp" filter (???), while
    "uspp" is the slow version (????).
    Use libpostprocess with "pp" instead.
telecine:
    Evil and useless. Available as dlopen filter for testing
    purposes.
test:
    Useless.
tfields:
    Useless, probably.
tile:
    Questionable use. Available as dlopen filter.
tinterlace:
    Evil and useless.
yuvcsp:
    Probably useless.
yvu9:
    Redundant with "scale".

Also remove the following left-over files: vd_null.c, vqf.h

1 files changed, 1 insertions, 98 deletions

diff --git a/libmpcodecs/vf.c b/libmpcodecs/vf.c
index f847dd69b8..5ec7d19570 100644
--- a/libmpcodecs/vf.c
+++ b/libmpcodecs/vf.c
@@ -38,7 +38,6 @@
 #include "libvo/fastmemcpy.h"
 
 extern const vf_info_t vf_info_vo;
-extern const vf_info_t vf_info_bmovl;
 extern const vf_info_t vf_info_crop;
 extern const vf_info_t vf_info_expand;
 extern const vf_info_t vf_info_pp;
@@ -48,161 +47,65 @@ extern const vf_info_t vf_info_noformat;
 extern const vf_info_t vf_info_flip;
 extern const vf_info_t vf_info_rotate;
 extern const vf_info_t vf_info_mirror;
-extern const vf_info_t vf_info_palette;
-extern const vf_info_t vf_info_lavc;
-extern const vf_info_t vf_info_dvbscale;
-extern const vf_info_t vf_info_cropdetect;
-extern const vf_info_t vf_info_test;
 extern const vf_info_t vf_info_noise;
-extern const vf_info_t vf_info_yvu9;
-extern const vf_info_t vf_info_lavcdeint;
-extern const vf_info_t vf_info_eq;
 extern const vf_info_t vf_info_eq2;
 extern const vf_info_t vf_info_gradfun;
-extern const vf_info_t vf_info_halfpack;
-extern const vf_info_t vf_info_dint;
-extern const vf_info_t vf_info_1bpp;
-extern const vf_info_t vf_info_2xsai;
 extern const vf_info_t vf_info_unsharp;
 extern const vf_info_t vf_info_swapuv;
-extern const vf_info_t vf_info_il;
-extern const vf_info_t vf_info_fil;
-extern const vf_info_t vf_info_boxblur;
-extern const vf_info_t vf_info_sab;
-extern const vf_info_t vf_info_smartblur;
-extern const vf_info_t vf_info_perspective;
 extern const vf_info_t vf_info_down3dright;
-extern const vf_info_t vf_info_field;
-extern const vf_info_t vf_info_denoise3d;
 extern const vf_info_t vf_info_hqdn3d;
-extern const vf_info_t vf_info_detc;
-extern const vf_info_t vf_info_telecine;
-extern const vf_info_t vf_info_tinterlace;
-extern const vf_info_t vf_info_tfields;
-extern const vf_info_t vf_info_ivtc;
 extern const vf_info_t vf_info_ilpack;
 extern const vf_info_t vf_info_dsize;
-extern const vf_info_t vf_info_decimate;
 extern const vf_info_t vf_info_softpulldown;
 extern const vf_info_t vf_info_pullup;
-extern const vf_info_t vf_info_filmdint;
-extern const vf_info_t vf_info_framestep;
-extern const vf_info_t vf_info_tile;
 extern const vf_info_t vf_info_delogo;
-extern const vf_info_t vf_info_remove_logo;
-extern const vf_info_t vf_info_hue;
-extern const vf_info_t vf_info_spp;
-extern const vf_info_t vf_info_uspp;
-extern const vf_info_t vf_info_fspp;
-extern const vf_info_t vf_info_pp7;
-extern const vf_info_t vf_info_yuvcsp;
-extern const vf_info_t vf_info_kerndeint;
-extern const vf_info_t vf_info_rgbtest;
-extern const vf_info_t vf_info_qp;
 extern const vf_info_t vf_info_phase;
 extern const vf_info_t vf_info_divtc;
-extern const vf_info_t vf_info_harddup;
 extern const vf_info_t vf_info_softskip;
 extern const vf_info_t vf_info_screenshot;
 extern const vf_info_t vf_info_screenshot_force;
 extern const vf_info_t vf_info_ass;
-extern const vf_info_t vf_info_mcdeint;
 extern const vf_info_t vf_info_yadif;
-extern const vf_info_t vf_info_blackframe;
-extern const vf_info_t vf_info_geq;
-extern const vf_info_t vf_info_ow;
-extern const vf_info_t vf_info_fixpts;
 extern const vf_info_t vf_info_stereo3d;
 extern const vf_info_t vf_info_dlopen;
 
 // list of available filters:
 static const vf_info_t *const filter_list[] = {
-#ifdef HAVE_POSIX_SELECT
-    &vf_info_bmovl,
-#endif
     &vf_info_crop,
     &vf_info_expand,
     &vf_info_scale,
-//    &vf_info_osd,
     &vf_info_vo,
     &vf_info_format,
     &vf_info_noformat,
     &vf_info_flip,
     &vf_info_rotate,
     &vf_info_mirror,
-    &vf_info_palette,
-    &vf_info_pp7,
 
 #ifdef CONFIG_LIBPOSTPROC
     &vf_info_pp,
 #endif
-    &vf_info_lavc,
-    &vf_info_lavcdeint,
+
     &vf_info_screenshot,
     &vf_info_screenshot_force,
-    &vf_info_fspp,
-    &vf_info_uspp,
 
-    &vf_info_dvbscale,
-    &vf_info_cropdetect,
-    &vf_info_test,
     &vf_info_noise,
-    &vf_info_yvu9,
-    &vf_info_eq,
     &vf_info_eq2,
     &vf_info_gradfun,
-    &vf_info_halfpack,
-    &vf_info_dint,
-    &vf_info_1bpp,
-    &vf_info_2xsai,
     &vf_info_unsharp,
     &vf_info_swapuv,
-    &vf_info_il,
-    &vf_info_fil,
-    &vf_info_boxblur,
-    &vf_info_sab,
-    &vf_info_smartblur,
-    &vf_info_perspective,
     &vf_info_down3dright,
-    &vf_info_field,
-    &vf_info_denoise3d,
     &vf_info_hqdn3d,
-    &vf_info_detc,
-    &vf_info_telecine,
-    &vf_info_tinterlace,
-    &vf_info_tfields,
-    &vf_info_ivtc,
     &vf_info_ilpack,
     &vf_info_dsize,
-    &vf_info_decimate,
     &vf_info_softpulldown,
     &vf_info_pullup,
-    &vf_info_filmdint,
-    &vf_info_framestep,
-    &vf_info_tile,
     &vf_info_delogo,
-    &vf_info_remove_logo,
-    &vf_info_hue,
-#ifdef CONFIG_FFMPEG_INTERNALS
-    &vf_info_spp,
-    &vf_info_mcdeint,
-#endif
-    &vf_info_geq,
-    &vf_info_qp,
-    &vf_info_yuvcsp,
-    &vf_info_kerndeint,
-    &vf_info_rgbtest,
     &vf_info_phase,
     &vf_info_divtc,
-    &vf_info_harddup,
-    &vf_info_softskip,
 #ifdef CONFIG_ASS
     &vf_info_ass,
 #endif
     &vf_info_yadif,
-    &vf_info_blackframe,
-    &vf_info_ow,
-    &vf_info_fixpts,
     &vf_info_stereo3d,
     &vf_info_dlopen,
     NULL