avfilter: do not leak frame if ff_get_audio_buffer() fails

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavfilter/af_adelay.c

@@ -192,8 +192,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
         return ff_filter_frame(ctx->outputs[0], frame);
 
     out_frame = ff_get_audio_buffer(inlink, frame->nb_samples);
-    if (!out_frame)
+    if (!out_frame) {
+        av_frame_free(&frame);
         return AVERROR(ENOMEM);
+    }
     av_frame_copy_props(out_frame, frame);
 
     for (i = 0; i < s->nb_delays; i++) {

libavfilter/af_aecho.c

@@ -279,8 +279,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
         out_frame = frame;
     } else {
         out_frame = ff_get_audio_buffer(inlink, frame->nb_samples);
-        if (!out_frame)
+        if (!out_frame) {
+            av_frame_free(&frame);
             return AVERROR(ENOMEM);
+        }
         av_frame_copy_props(out_frame, frame);
     }
 

libavfilter/af_biquads.c

@@ -401,8 +401,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
         out_buf = buf;
     } else {
         out_buf = ff_get_audio_buffer(inlink, nb_samples);
-        if (!out_buf)
+        if (!out_buf) {
+            av_frame_free(&buf);
             return AVERROR(ENOMEM);
+        }
         av_frame_copy_props(out_buf, buf);
     }
 

libavfilter/af_chorus.c

@@ -247,8 +247,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
         out_frame = frame;
     } else {
         out_frame = ff_get_audio_buffer(inlink, frame->nb_samples);
-        if (!out_frame)
+        if (!out_frame) {
+            av_frame_free(&frame);
             return AVERROR(ENOMEM);
+        }
         av_frame_copy_props(out_frame, frame);
     }