avfilter/internal: Combine get_(audio|video)_buffer into union

These fields are mutually exclusive, so putting them in a union
is possible and makes AVFilterPad smaller.

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/libavfilter/avf_concat.c b/libavfilter/avf_concat.c
index 333a0b090c..5f4e2f74df 100644
--- a/libavfilter/avf_concat.c
+++ b/libavfilter/avf_concat.c
@@ -313,9 +313,11 @@ static av_cold int init(AVFilterContext *ctx)
             for (str = 0; str < cat->nb_streams[type]; str++) {
                 AVFilterPad pad = {
                     .type             = type,
-                    .get_video_buffer = get_video_buffer,
-                    .get_audio_buffer = get_audio_buffer,
                 };
+                if (type == AVMEDIA_TYPE_VIDEO)
+                    pad.get_buffer.video = get_video_buffer;
+                else
+                    pad.get_buffer.audio = get_audio_buffer;
                 pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
                 if ((ret = ff_insert_inpad(ctx, ctx->nb_inputs, &pad)) < 0) {
                     av_freep(&pad.name);