lavfi: replace empty input/output lists with null pointers

Signed-off-by: Mans Rullgard <mans@mansr.com>

libavfilter/af_amix.c

@@ -556,7 +556,7 @@ AVFilter avfilter_af_amix = {
     .uninit         = uninit,
     .query_formats  = query_formats,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL}},
+    .inputs    = NULL,
     .outputs   = (const AVFilterPad[]) {{ .name          = "default",
                                           .type          = AVMEDIA_TYPE_AUDIO,
                                           .config_props  = config_output,

libavfilter/af_channelsplit.c

@@ -148,5 +148,5 @@ AVFilter avfilter_af_channelsplit = {
                                        .type           = AVMEDIA_TYPE_AUDIO,
                                        .filter_samples = filter_samples, },
                                      { NULL }},
-    .outputs = (const AVFilterPad[]){{ NULL }},
+    .outputs = NULL,
 };

libavfilter/af_join.c

@@ -495,7 +495,7 @@ AVFilter avfilter_af_join = {
     .uninit         = join_uninit,
     .query_formats  = join_query_formats,
 
-    .inputs  = (const AVFilterPad[]){{ NULL }},
+    .inputs  = NULL,
     .outputs = (const AVFilterPad[]){{ .name          = "default",
                                        .type          = AVMEDIA_TYPE_AUDIO,
                                        .config_props  = join_config_output,

libavfilter/asink_anullsink.c

@@ -39,5 +39,5 @@ AVFilter avfilter_asink_anullsink = {
         },
         { .name = NULL},
     },
-    .outputs   = (const AVFilterPad[]) {{ .name = NULL }},
+    .outputs   = NULL,
 };

libavfilter/asrc_anullsrc.c

@@ -91,7 +91,7 @@ AVFilter avfilter_asrc_anullsrc = {
     .init        = init,
     .priv_size   = sizeof(ANullContext),
 
-    .inputs      = (const AVFilterPad[]) {{ .name = NULL}},
+    .inputs      = NULL,
 
     .outputs     = (const AVFilterPad[]) {{ .name = "default",
                                             .type = AVMEDIA_TYPE_AUDIO,

libavfilter/avfilter.c

@@ -302,6 +302,9 @@ static int pad_count(const AVFilterPad *pads)
 {
     int count;
 
+    if (!pads)
+        return 0;
+
     for(count = 0; pads->name; count ++) pads ++;
     return count;
 }

libavfilter/buffersink.c

@@ -152,7 +152,7 @@ AVFilter avfilter_vsink_buffer = {
                                           .min_perms     = AV_PERM_READ,
                                           .needs_fifo    = 1 },
                                         { .name = NULL }},
-    .outputs   = (const AVFilterPad[]) {{ .name = NULL }},
+    .outputs   = NULL,
 };
 
 AVFilter avfilter_asink_abuffer = {
@@ -167,5 +167,5 @@ AVFilter avfilter_asink_abuffer = {
                                           .min_perms      = AV_PERM_READ,
                                           .needs_fifo     = 1 },
                                         { .name = NULL }},
-    .outputs   = (const AVFilterPad[]) {{ .name = NULL }},
+    .outputs   = NULL,
 };

libavfilter/buffersrc.c

@@ -364,7 +364,7 @@ AVFilter avfilter_vsrc_buffer = {
     .init      = init_video,
     .uninit    = uninit,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL }},
+    .inputs    = NULL,
     .outputs   = (const AVFilterPad[]) {{ .name            = "default",
                                           .type            = AVMEDIA_TYPE_VIDEO,
                                           .request_frame   = request_frame,
@@ -382,7 +382,7 @@ AVFilter avfilter_asrc_abuffer = {
     .init      = init_audio,
     .uninit    = uninit,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL }},
+    .inputs    = NULL,
     .outputs   = (const AVFilterPad[]) {{ .name            = "default",
                                           .type            = AVMEDIA_TYPE_AUDIO,
                                           .request_frame   = request_frame,

libavfilter/split.c

@@ -124,7 +124,7 @@ AVFilter avfilter_vf_split = {
                                           .draw_slice      = draw_slice,
                                           .end_frame       = end_frame, },
                                         { .name = NULL}},
-    .outputs   = (const AVFilterPad[]) {{ .name = NULL}},
+    .outputs   = NULL,
 };
 
 static int filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
@@ -160,5 +160,5 @@ AVFilter avfilter_af_asplit = {
                                         .get_audio_buffer = ff_null_get_audio_buffer,
                                         .filter_samples   = filter_samples },
                                       { .name = NULL }},
-    .outputs = (const AVFilterPad[]) {{ .name = NULL }},
+    .outputs = NULL,
 };

libavfilter/vf_frei0r.c

@@ -488,7 +488,7 @@ AVFilter avfilter_vsrc_frei0r_src = {
 
     .query_formats = query_formats,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL}},
+    .inputs    = NULL,
 
     .outputs   = (const AVFilterPad[]) {{ .name            = "default",
                                           .type            = AVMEDIA_TYPE_VIDEO,

libavfilter/vsink_nullsink.c

@@ -45,5 +45,5 @@ AVFilter avfilter_vsink_nullsink = {
         },
         { .name = NULL},
     },
-    .outputs   = (const AVFilterPad[]) {{ .name = NULL }},
+    .outputs   = NULL,
 };

libavfilter/vsrc_color.c

@@ -192,7 +192,7 @@ AVFilter avfilter_vsrc_color = {
 
     .query_formats = query_formats,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL}},
+    .inputs    = NULL,
 
     .outputs   = (const AVFilterPad[]) {{ .name            = "default",
                                           .type            = AVMEDIA_TYPE_VIDEO,

libavfilter/vsrc_movie.c

@@ -317,7 +317,7 @@ AVFilter avfilter_vsrc_movie = {
     .uninit        = uninit,
     .query_formats = query_formats,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL }},
+    .inputs    = NULL,
     .outputs   = (const AVFilterPad[]) {{ .name            = "default",
                                           .type            = AVMEDIA_TYPE_VIDEO,
                                           .request_frame   = request_frame,

libavfilter/vsrc_nullsrc.c

@@ -121,7 +121,7 @@ AVFilter avfilter_vsrc_nullsrc = {
     .init       = init,
     .priv_size = sizeof(NullContext),
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL}},
+    .inputs    = NULL,
 
     .outputs   = (const AVFilterPad[]) {
         {

libavfilter/vsrc_testsrc.c

@@ -367,7 +367,7 @@ AVFilter avfilter_vsrc_testsrc = {
 
     .query_formats = test_query_formats,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL}},
+    .inputs    = NULL,
 
     .outputs   = (const AVFilterPad[]) {{ .name = "default",
                                           .type = AVMEDIA_TYPE_VIDEO,
@@ -494,7 +494,7 @@ AVFilter avfilter_vsrc_rgbtestsrc = {
 
     .query_formats = rgbtest_query_formats,
 
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL}},
+    .inputs    = NULL,
 
     .outputs   = (const AVFilterPad[]) {{ .name = "default",
                                           .type = AVMEDIA_TYPE_VIDEO,