build: make libavfilter mandatory

The complex filter support that will be added makes much more complex
use of libavfilter, and I'm not going to bother with adding hacks to
keep libavfilter optional.

audio/filter/af.c

@@ -59,9 +59,7 @@ static const struct af_info *const filter_list[] = {
     &af_info_rubberband,
 #endif
     &af_info_scaletempo,
-#if HAVE_LIBAVFILTER
     &af_info_lavfi,
-#endif
     NULL
 };
 

common/av_log.c

@@ -36,15 +36,12 @@
 #include <libavcodec/avcodec.h>
 #include <libavformat/avformat.h>
 #include <libswscale/swscale.h>
+#include <libavfilter/avfilter.h>
 
 #if HAVE_LIBAVDEVICE
 #include <libavdevice/avdevice.h>
 #endif
 
-#if HAVE_LIBAVFILTER
-#include <libavfilter/avfilter.h>
-#endif
-
 #if HAVE_LIBAVRESAMPLE
 #include <libavresample/avresample.h>
 #endif
@@ -161,10 +158,8 @@ void init_libav(struct mpv_global *global)
     avcodec_register_all();
     av_register_all();
     avformat_network_init();
-
-#if HAVE_LIBAVFILTER
     avfilter_register_all();
-#endif
+
 #if HAVE_LIBAVDEVICE
     avdevice_register_all();
 #endif
@@ -196,9 +191,7 @@ void print_libav_versions(struct mp_log *log, int v)
         {"libavcodec",    LIBAVCODEC_VERSION_INT,    avcodec_version()},
         {"libavformat",   LIBAVFORMAT_VERSION_INT,   avformat_version()},
         {"libswscale",    LIBSWSCALE_VERSION_INT,    swscale_version()},
-#if HAVE_LIBAVFILTER
         {"libavfilter",   LIBAVFILTER_VERSION_INT,   avfilter_version()},
-#endif
 #if HAVE_LIBAVRESAMPLE
         {"libavresample", LIBAVRESAMPLE_VERSION_INT, avresample_version()},
 #endif

video/filter/vf.c

@@ -71,7 +71,6 @@ static const vf_info_t *const filter_list[] = {
     &vf_info_noformat,
     &vf_info_flip,
 
-#if HAVE_LIBAVFILTER
     &vf_info_mirror,
     &vf_info_lavfi,
     &vf_info_rotate,
@@ -79,7 +78,6 @@ static const vf_info_t *const filter_list[] = {
     &vf_info_pullup,
     &vf_info_yadif,
     &vf_info_stereo3d,
-#endif
 
     &vf_info_eq,
     &vf_info_dsize,

wscript

@@ -422,9 +422,10 @@ FFmpeg/Libav libraries. You need at least {0}. Aborting.".format(libav_versions_
         'req':  True,
         'fmsg': 'No resampler found. Install libavresample or libswresample (FFmpeg).'
     }, {
-        'name': '--libavfilter',
+        'name': 'libavfilter',
         'desc': 'libavfilter',
         'func': check_pkg_config('libavfilter', '>= 5.0.0'),
+        'req':  True,
     }, {
         'name': '--libavdevice',
         'desc': 'libavdevice',

wscript_build.py

@@ -120,7 +120,7 @@ def build(ctx):
         ( "audio/filter/af_equalizer.c" ),
         ( "audio/filter/af_format.c" ),
         ( "audio/filter/af_lavcac3enc.c" ),
-        ( "audio/filter/af_lavfi.c",             "libavfilter" ),
+        ( "audio/filter/af_lavfi.c" ),
         ( "audio/filter/af_lavrresample.c" ),
         ( "audio/filter/af_pan.c" ),
         ( "audio/filter/af_rubberband.c",        "rubberband" ),
@@ -298,20 +298,20 @@ def build(ctx):
         ( "video/filter/vf_expand.c" ),
         ( "video/filter/vf_flip.c" ),
         ( "video/filter/vf_format.c" ),
-        ( "video/filter/vf_gradfun.c",           "libavfilter"),
-        ( "video/filter/vf_lavfi.c",             "libavfilter"),
-        ( "video/filter/vf_mirror.c",            "libavfilter"),
+        ( "video/filter/vf_gradfun.c" ),
+        ( "video/filter/vf_lavfi.c" ),
+        ( "video/filter/vf_mirror.c" ),
         ( "video/filter/vf_noformat.c" ),
-        ( "video/filter/vf_pullup.c",            "libavfilter"),
-        ( "video/filter/vf_rotate.c",            "libavfilter"),
+        ( "video/filter/vf_pullup.c" ),
+        ( "video/filter/vf_rotate.c" ),
         ( "video/filter/vf_scale.c" ),
-        ( "video/filter/vf_stereo3d.c",          "libavfilter"),
+        ( "video/filter/vf_stereo3d.c" ),
         ( "video/filter/vf_sub.c" ),
         ( "video/filter/vf_vapoursynth.c",       "vapoursynth-core" ),
         ( "video/filter/vf_vavpp.c",             "vaapi"),
         ( "video/filter/vf_vdpaupp.c",           "vdpau" ),
         ( "video/filter/vf_vdpaurb.c",           "vdpau" ),
-        ( "video/filter/vf_yadif.c",             "libavfilter"),
+        ( "video/filter/vf_yadif.c" ),
         ( "video/out/aspect.c" ),
         ( "video/out/bitmap_packer.c" ),
         ( "video/out/cocoa/video_view.m",        "cocoa" ),