lavfi: remove avfilter_null_* from public API on next bump.

Those functions are only useful inside filters. It is better to not
support user filters until the API is more stable.

diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 0d40b76..54adc5c 100644 (file)
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -487,18 +487,24 @@ int avfilter_default_query_formats(AVFilterContext *ctx);
  */
 void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats);
 
+#if FF_API_FILTERS_PUBLIC
 /** start_frame() handler for filters which simply pass video along */
+attribute_deprecated
 void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
 
 /** draw_slice() handler for filters which simply pass video along */
+attribute_deprecated
 void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
 
 /** end_frame() handler for filters which simply pass video along */
+attribute_deprecated
 void avfilter_null_end_frame(AVFilterLink *link);
 
 /** get_video_buffer() handler for filters which simply pass video along */
+attribute_deprecated
 AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link,
                                                   int perms, int w, int h);
+#endif
 
 /**
  * Filter definition. This defines the pads a filter contains, and all the

diff --git a/libavfilter/split.c b/libavfilter/split.c
index 83ad765..da33b7d 100644 (file)
--- a/libavfilter/split.c
+++ b/libavfilter/split.c
@@ -25,6 +25,7 @@
 
 #include "avfilter.h"
 #include "audio.h"
+#include "video.h"
 
 static int split_init(AVFilterContext *ctx, const char *args, void *opaque)
 {
@@ -100,7 +101,7 @@ AVFilter avfilter_vf_split = {
 
     .inputs    = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer= avfilter_null_get_video_buffer,
+                                    .get_video_buffer= ff_null_get_video_buffer,
                                     .start_frame     = start_frame,
                                     .draw_slice      = draw_slice,
                                     .end_frame       = end_frame, },

diff --git a/libavfilter/vf_aspect.c b/libavfilter/vf_aspect.c
index 9db29c7..4e1fdac 100644 (file)
--- a/libavfilter/vf_aspect.c
+++ b/libavfilter/vf_aspect.c
@@ -25,6 +25,7 @@
 
 #include "libavutil/mathematics.h"
 #include "avfilter.h"
+#include "video.h"
 
 typedef struct {
     AVRational aspect;
@@ -100,9 +101,9 @@ AVFilter avfilter_vf_setdar = {
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
                                     .config_props     = setdar_config_props,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .start_frame      = start_frame,
-                                    .end_frame        = avfilter_null_end_frame },
+                                    .end_frame        = ff_null_end_frame },
                                   { .name = NULL}},
 
     .outputs   = (AVFilterPad[]) {{ .name             = "default",
@@ -133,9 +134,9 @@ AVFilter avfilter_vf_setsar = {
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
                                     .config_props     = setsar_config_props,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .start_frame      = start_frame,
-                                    .end_frame        = avfilter_null_end_frame },
+                                    .end_frame        = ff_null_end_frame },
                                   { .name = NULL}},
 
     .outputs   = (AVFilterPad[]) {{ .name             = "default",

diff --git a/libavfilter/vf_blackframe.c b/libavfilter/vf_blackframe.c
index 770eec9..7e69ccb 100644 (file)
--- a/libavfilter/vf_blackframe.c
+++ b/libavfilter/vf_blackframe.c
@@ -28,6 +28,7 @@
  */
 
 #include "avfilter.h"
+#include "video.h"
 
 typedef struct {
     unsigned int bamount; ///< black amount
@@ -118,8 +119,8 @@ AVFilter avfilter_vf_blackframe = {
     .inputs    = (AVFilterPad[]) {{ .name = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
                                     .draw_slice       = draw_slice,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
-                                    .start_frame      = avfilter_null_start_frame,
+                                    .get_video_buffer = ff_null_get_video_buffer,
+                                    .start_frame      = ff_null_start_frame,
                                     .end_frame        = end_frame, },
                                   { .name = NULL}},
 

diff --git a/libavfilter/vf_copy.c b/libavfilter/vf_copy.c
index 705ad1e..271a729 100644 (file)
--- a/libavfilter/vf_copy.c
+++ b/libavfilter/vf_copy.c
@@ -22,6 +22,7 @@
  */
 
 #include "avfilter.h"
+#include "video.h"
 
 AVFilter avfilter_vf_copy = {
     .name      = "copy",
@@ -29,9 +30,9 @@ AVFilter avfilter_vf_copy = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
-                                    .start_frame      = avfilter_null_start_frame,
-                                    .end_frame        = avfilter_null_end_frame,
+                                    .get_video_buffer = ff_null_get_video_buffer,
+                                    .start_frame      = ff_null_start_frame,
+                                    .end_frame        = ff_null_end_frame,
                                     .rej_perms        = ~0 },
                                   { .name = NULL}},
     .outputs   = (AVFilterPad[]) {{ .name             = "default",

diff --git a/libavfilter/vf_crop.c b/libavfilter/vf_crop.c
index d3b5a09..5452601 100644 (file)
--- a/libavfilter/vf_crop.c
+++ b/libavfilter/vf_crop.c
@@ -26,6 +26,7 @@
 /* #define DEBUG */
 
 #include "avfilter.h"
+#include "video.h"
 #include "libavutil/eval.h"
 #include "libavutil/avstring.h"
 #include "libavutil/libm.h"
@@ -333,7 +334,7 @@ AVFilter avfilter_vf_crop = {
                                     .start_frame      = start_frame,
                                     .draw_slice       = draw_slice,
                                     .end_frame        = end_frame,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .config_props     = config_input, },
                                   { .name = NULL}},
     .outputs   = (AVFilterPad[]) {{ .name             = "default",

diff --git a/libavfilter/vf_cropdetect.c b/libavfilter/vf_cropdetect.c
index 34b5dc9..d321afd 100644 (file)
--- a/libavfilter/vf_cropdetect.c
+++ b/libavfilter/vf_cropdetect.c
@@ -25,6 +25,7 @@
 
 #include "libavutil/imgutils.h"
 #include "avfilter.h"
+#include "video.h"
 
 typedef struct {
     int x1, y1, x2, y2;
@@ -203,8 +204,8 @@ AVFilter avfilter_vf_cropdetect = {
     .inputs    = (AVFilterPad[]) {{ .name = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
                                     .config_props     = config_input,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
-                                    .start_frame      = avfilter_null_start_frame,
+                                    .get_video_buffer = ff_null_get_video_buffer,
+                                    .start_frame      = ff_null_start_frame,
                                     .end_frame        = end_frame, },
                                   { .name = NULL}},
 

diff --git a/libavfilter/vf_delogo.c b/libavfilter/vf_delogo.c
index ca31568..a54abe1 100644 (file)
--- a/libavfilter/vf_delogo.c
+++ b/libavfilter/vf_delogo.c
@@ -29,6 +29,7 @@
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
+#include "video.h"
 
 /**
  * Apply a simple delogo algorithm to the image in dst and put the
@@ -271,7 +272,7 @@ AVFilter avfilter_vf_delogo = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .start_frame      = start_frame,
                                     .draw_slice       = null_draw_slice,
                                     .end_frame        = end_frame,

diff --git a/libavfilter/vf_drawbox.c b/libavfilter/vf_drawbox.c
index ab5cb03..fc80402 100644 (file)
--- a/libavfilter/vf_drawbox.c
+++ b/libavfilter/vf_drawbox.c
@@ -28,6 +28,7 @@
 #include "libavutil/pixdesc.h"
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
+#include "video.h"
 
 enum { Y, U, V, A };
 
@@ -130,10 +131,10 @@ AVFilter avfilter_vf_drawbox = {
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
                                     .config_props     = config_input,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
-                                    .start_frame      = avfilter_null_start_frame,
+                                    .get_video_buffer = ff_null_get_video_buffer,
+                                    .start_frame      = ff_null_start_frame,
                                     .draw_slice       = draw_slice,
-                                    .end_frame        = avfilter_null_end_frame,
+                                    .end_frame        = ff_null_end_frame,
                                     .min_perms        = AV_PERM_WRITE | AV_PERM_READ,
                                     .rej_perms        = AV_PERM_PRESERVE },
                                   { .name = NULL}},

diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
index 4846716..5ef0d8c 100644 (file)
--- a/libavfilter/vf_drawtext.c
+++ b/libavfilter/vf_drawtext.c
@@ -41,6 +41,7 @@
 #include "libavutil/lfg.h"
 #include "avfilter.h"
 #include "drawutils.h"
+#include "video.h"
 
 #undef time
 
@@ -875,7 +876,7 @@ AVFilter avfilter_vf_drawtext = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .start_frame      = start_frame,
                                     .draw_slice       = null_draw_slice,
                                     .end_frame        = end_frame,

diff --git a/libavfilter/vf_fade.c b/libavfilter/vf_fade.c
index 9f748b8..a0f37d2 100644 (file)
--- a/libavfilter/vf_fade.c
+++ b/libavfilter/vf_fade.c
@@ -27,6 +27,7 @@
 
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
+#include "video.h"
 
 typedef struct {
     int factor, fade_per_frame;
@@ -157,8 +158,8 @@ AVFilter avfilter_vf_fade = {
     .inputs    = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO,
                                     .config_props    = config_props,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
-                                    .start_frame      = avfilter_null_start_frame,
+                                    .get_video_buffer = ff_null_get_video_buffer,
+                                    .start_frame      = ff_null_start_frame,
                                     .draw_slice      = draw_slice,
                                     .end_frame       = end_frame,
                                     .min_perms       = AV_PERM_READ | AV_PERM_WRITE,

diff --git a/libavfilter/vf_fifo.c b/libavfilter/vf_fifo.c
index 836cce2..b99cec3 100644 (file)
--- a/libavfilter/vf_fifo.c
+++ b/libavfilter/vf_fifo.c
@@ -24,6 +24,7 @@
  */
 
 #include "avfilter.h"
+#include "video.h"
 
 typedef struct BufPic {
     AVFilterBufferRef *picref;
@@ -106,7 +107,7 @@ AVFilter avfilter_vf_fifo = {
 
     .inputs    = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer= avfilter_null_get_video_buffer,
+                                    .get_video_buffer= ff_null_get_video_buffer,
                                     .start_frame     = start_frame,
                                     .draw_slice      = draw_slice,
                                     .end_frame       = end_frame,

diff --git a/libavfilter/vf_format.c b/libavfilter/vf_format.c
index 9c1e0d4..aaaca27 100644 (file)
--- a/libavfilter/vf_format.c
+++ b/libavfilter/vf_format.c
@@ -25,6 +25,7 @@
 
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
+#include "video.h"
 
 typedef struct {
     /**
@@ -104,10 +105,10 @@ AVFilter avfilter_vf_format = {
 
     .inputs    = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer= avfilter_null_get_video_buffer,
-                                    .start_frame     = avfilter_null_start_frame,
-                                    .draw_slice      = avfilter_null_draw_slice,
-                                    .end_frame       = avfilter_null_end_frame, },
+                                    .get_video_buffer= ff_null_get_video_buffer,
+                                    .start_frame     = ff_null_start_frame,
+                                    .draw_slice      = ff_null_draw_slice,
+                                    .end_frame       = ff_null_end_frame, },
                                   { .name = NULL}},
     .outputs   = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO },
@@ -134,10 +135,10 @@ AVFilter avfilter_vf_noformat = {
 
     .inputs    = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer= avfilter_null_get_video_buffer,
-                                    .start_frame     = avfilter_null_start_frame,
-                                    .draw_slice      = avfilter_null_draw_slice,
-                                    .end_frame       = avfilter_null_end_frame, },
+                                    .get_video_buffer= ff_null_get_video_buffer,
+                                    .start_frame     = ff_null_start_frame,
+                                    .draw_slice      = ff_null_draw_slice,
+                                    .end_frame       = ff_null_end_frame, },
                                   { .name = NULL}},
     .outputs   = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO },

diff --git a/libavfilter/vf_null.c b/libavfilter/vf_null.c
index 8414c5f..470c3d2 100644 (file)
--- a/libavfilter/vf_null.c
+++ b/libavfilter/vf_null.c
@@ -22,6 +22,7 @@
  */
 
 #include "avfilter.h"
+#include "video.h"
 
 AVFilter avfilter_vf_null = {
     .name      = "null",
@@ -31,9 +32,9 @@ AVFilter avfilter_vf_null = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
-                                    .start_frame      = avfilter_null_start_frame,
-                                    .end_frame        = avfilter_null_end_frame },
+                                    .get_video_buffer = ff_null_get_video_buffer,
+                                    .start_frame      = ff_null_start_frame,
+                                    .end_frame        = ff_null_end_frame },
                                   { .name = NULL}},
 
     .outputs   = (AVFilterPad[]) {{ .name             = "default",

diff --git a/libavfilter/vf_select.c b/libavfilter/vf_select.c
index 13ec040..2b6b49c 100644 (file)
--- a/libavfilter/vf_select.c
+++ b/libavfilter/vf_select.c
@@ -27,6 +27,7 @@
 #include "libavutil/fifo.h"
 #include "libavutil/mathematics.h"
 #include "avfilter.h"
+#include "video.h"
 
 static const char *const var_names[] = {
     "E",                 ///< Euler number
@@ -339,7 +340,7 @@ AVFilter avfilter_vf_select = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .config_props     = config_input,
                                     .start_frame      = start_frame,
                                     .draw_slice       = draw_slice,

diff --git a/libavfilter/vf_setpts.c b/libavfilter/vf_setpts.c
index b49ca5e..103f265 100644 (file)
--- a/libavfilter/vf_setpts.c
+++ b/libavfilter/vf_setpts.c
@@ -29,6 +29,7 @@
 #include "libavutil/eval.h"
 #include "libavutil/mathematics.h"
 #include "avfilter.h"
+#include "video.h"
 
 static const char *const var_names[] = {
     "E",           ///< Euler number
@@ -148,7 +149,7 @@ AVFilter avfilter_vf_setpts = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .config_props     = config_input,
                                     .start_frame      = start_frame, },
                                   { .name = NULL }},

diff --git a/libavfilter/vf_settb.c b/libavfilter/vf_settb.c
index 49f7a57..b40ede8 100644 (file)
--- a/libavfilter/vf_settb.c
+++ b/libavfilter/vf_settb.c
@@ -29,6 +29,7 @@
 #include "libavutil/rational.h"
 #include "avfilter.h"
 #include "internal.h"
+#include "video.h"
 
 static const char *const var_names[] = {
     "E",
@@ -130,9 +131,9 @@ AVFilter avfilter_vf_settb = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .start_frame      = start_frame,
-                                    .end_frame        = avfilter_null_end_frame },
+                                    .end_frame        = ff_null_end_frame },
                                   { .name = NULL }},
 
     .outputs   = (AVFilterPad[]) {{ .name            = "default",

diff --git a/libavfilter/vf_showinfo.c b/libavfilter/vf_showinfo.c
index aa2a7f1..0475f9b 100644 (file)
--- a/libavfilter/vf_showinfo.c
+++ b/libavfilter/vf_showinfo.c
@@ -26,6 +26,7 @@
 #include "libavutil/imgutils.h"
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
+#include "video.h"
 
 typedef struct {
     unsigned int frame;
@@ -86,8 +87,8 @@ AVFilter avfilter_vf_showinfo = {
 
     .inputs    = (AVFilterPad[]) {{ .name = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
-                                    .start_frame      = avfilter_null_start_frame,
+                                    .get_video_buffer = ff_null_get_video_buffer,
+                                    .start_frame      = ff_null_start_frame,
                                     .end_frame        = end_frame,
                                     .min_perms        = AV_PERM_READ, },
                                   { .name = NULL}},

diff --git a/libavfilter/vf_slicify.c b/libavfilter/vf_slicify.c
index cc56fe8..31d7497 100644 (file)
--- a/libavfilter/vf_slicify.c
+++ b/libavfilter/vf_slicify.c
@@ -24,6 +24,7 @@
  */
 
 #include "avfilter.h"
+#include "video.h"
 #include "libavutil/pixdesc.h"
 
 typedef struct {
@@ -105,11 +106,11 @@ AVFilter avfilter_vf_slicify = {
 
     .inputs    = (AVFilterPad[]) {{ .name             = "default",
                                     .type             = AVMEDIA_TYPE_VIDEO,
-                                    .get_video_buffer = avfilter_null_get_video_buffer,
+                                    .get_video_buffer = ff_null_get_video_buffer,
                                     .start_frame      = start_frame,
                                     .draw_slice       = draw_slice,
                                     .config_props     = config_props,
-                                    .end_frame        = avfilter_null_end_frame, },
+                                    .end_frame        = ff_null_end_frame, },
                                   { .name = NULL}},
     .outputs   = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO, },

diff --git a/libavfilter/video.c b/libavfilter/video.c
index 74b0837..6a19388 100644 (file)
--- a/libavfilter/video.c
+++ b/libavfilter/video.c
@@ -65,7 +65,7 @@ static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
     av_dlog(ctx, "]%s", end ? "\n" : "");
 }
 
-AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
+AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
 {
     return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
 }
@@ -160,7 +160,7 @@ AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int
     return ret;
 }
 
-void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
+void ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
 {
     avfilter_start_frame(link->dst->outputs[0], picref);
 }
@@ -211,7 +211,7 @@ void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
     start_frame(link, link->cur_buf);
 }
 
-void avfilter_null_end_frame(AVFilterLink *link)
+void ff_null_end_frame(AVFilterLink *link)
 {
     avfilter_end_frame(link->dst->outputs[0]);
 }
@@ -252,7 +252,7 @@ void avfilter_end_frame(AVFilterLink *link)
     }
 }
 
-void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
+void ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
 {
     avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
 }
@@ -326,4 +326,20 @@ void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_d
 {
     default_draw_slice(inlink, y, h, slice_dir);
 }
+AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
+{
+    return ff_null_get_video_buffer(link, perms, w, h);
+}
+void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
+{
+    ff_null_start_frame(link, picref);
+}
+void avfilter_null_end_frame(AVFilterLink *link)
+{
+    ff_null_end_frame(link);
+}
+void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
+{
+    ff_null_draw_slice(link, y, h, slice_dir);
+}
 #endif

diff --git a/libavfilter/video.h b/libavfilter/video.h
index 99f84ec..f20f30b 100644 (file)
--- a/libavfilter/video.h
+++ b/libavfilter/video.h
@@ -21,4 +21,10 @@
 
 AVFilterBufferRef *ff_default_get_video_buffer(AVFilterLink *link,
                                                int perms, int w, int h);
+AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h);
+
+void ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
+void ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
+void ff_null_end_frame(AVFilterLink *link);
+
 #endif /* AVFILTER_VIDEO_H */