avfilter/avf_showcqt: rewrite showcqt and add features

[ffmpeg] / libavfilter / vf_showpalette.c

diff --git a/libavfilter/vf_showpalette.c b/libavfilter/vf_showpalette.c
index e4d59b62c8ee383ddcadcdefd39e9e6b45c40c28..807dfb1d9549953261a147189bb8618eef7c6802 100644 (file)
--- a/libavfilter/vf_showpalette.c
+++ b/libavfilter/vf_showpalette.c
@@ -46,6 +46,7 @@ static int query_formats(AVFilterContext *ctx)
 {
     static const enum AVPixelFormat in_fmts[]  = {AV_PIX_FMT_PAL8,  AV_PIX_FMT_NONE};
     static const enum AVPixelFormat out_fmts[] = {AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE};
+    int ret;
     AVFilterFormats *in  = ff_make_format_list(in_fmts);
     AVFilterFormats *out = ff_make_format_list(out_fmts);
     if (!in || !out) {
@@ -53,8 +54,9 @@ static int query_formats(AVFilterContext *ctx)
         av_freep(&out);
         return AVERROR(ENOMEM);
     }
-    ff_formats_ref(in,  &ctx->inputs[0]->out_formats);
-    ff_formats_ref(out, &ctx->outputs[0]->in_formats);
+    if ((ret = ff_formats_ref(in , &ctx->inputs[0]->out_formats)) < 0 ||
+        (ret = ff_formats_ref(out, &ctx->outputs[0]->in_formats)) < 0)
+        return ret;
     return 0;
 }