af_hdcd: Don't warn if converting from AV_SAMPLE_FMT_S16P

Also checking AVFilterLink->type is AVMEDIA_TYPE_AUDIO before
calling av_get_sample_fmt_name() on AVFilterLink->format.
Signed-off-by: Burt P <pburt0@gmail.com>

libavfilter/af_hdcd.c

@@ -1714,7 +1714,10 @@ static int config_input(AVFilterLink *inlink) {
     AVFilterLink *lk = inlink;
     while(lk != NULL) {
         AVFilterContext *nextf = lk->src;
-        if (lk->format != AV_SAMPLE_FMT_S16 || lk->sample_rate != 44100) {
+        if (lk->type == AVMEDIA_TYPE_AUDIO) {
+            int sfok = (lk->format == AV_SAMPLE_FMT_S16 ||
+                        lk->format == AV_SAMPLE_FMT_S16P);
+            if ( !sfok || lk->sample_rate != 44100) {
                 av_log(ctx, AV_LOG_WARNING, "An input format is %s@%dHz at %s. It will truncated/resampled to s16@44100Hz.\n",
                     av_get_sample_fmt_name(lk->format), lk->sample_rate,
                     (nextf->name) ? nextf->name : "<unknown>"
@@ -1722,6 +1725,7 @@ static int config_input(AVFilterLink *inlink) {
                 s->bad_config = 1;
                 break;
             }
+        }
         lk = (nextf->inputs) ? nextf->inputs[0] : NULL;
     }
     /* more warning will appear after config_output() */
@@ -1746,14 +1750,16 @@ static int config_output(AVFilterLink *outlink) {
     AVFilterLink *lk = outlink;
     while(lk != NULL) {
         AVFilterContext *nextf = lk->dst;
+        if (lk->type == AVMEDIA_TYPE_AUDIO) {
             if (lk->format == AV_SAMPLE_FMT_S16 || lk->format == AV_SAMPLE_FMT_U8) {
-            av_log(ctx, AV_LOG_WARNING, "s24 output is being truncated to %s at %s. (Try -f s24le after the filter)\n",
+                av_log(ctx, AV_LOG_WARNING, "s24 output is being truncated to %s at %s.\n",
                     av_get_sample_fmt_name(lk->format),
                     (nextf->name) ? nextf->name : "<unknown>"
                     );
                 s->bad_config = 1;
                 break;
             }
+        }
         lk = (nextf->outputs) ? nextf->outputs[0] : NULL;
     }
     if (s->bad_config)