aformat/bfi: use ff_get_extradata()

libavformat/bfi.c

@@ -54,7 +54,7 @@ static int bfi_read_header(AVFormatContext * s)
     AVIOContext *pb = s->pb;
     AVStream *vstream;
     AVStream *astream;
-    int fps, chunk_header;
+    int ret, fps, chunk_header;
 
     /* Initialize the video codec... */
     vstream = avformat_new_stream(s, NULL);
@@ -80,12 +80,9 @@ static int bfi_read_header(AVFormatContext * s)
 
     /*Load the palette to extradata */
     avio_skip(pb, 8);
-    vstream->codecpar->extradata      = av_malloc(768);
-    if (!vstream->codecpar->extradata)
-        return AVERROR(ENOMEM);
-    vstream->codecpar->extradata_size = 768;
-    avio_read(pb, vstream->codecpar->extradata,
-               vstream->codecpar->extradata_size);
+    ret = ff_get_extradata(s, vstream->codecpar, pb, 768);
+    if (ret < 0)
+        return ret;
 
     astream->codecpar->sample_rate = avio_rl32(pb);
     if (astream->codecpar->sample_rate <= 0) {