Merge commit '7e86c27b4ee9e5a3fbe6cf5249b9d918b2a5e731'

* commit '7e86c27b4ee9e5a3fbe6cf5249b9d918b2a5e731':
  lavr: add a function for checking whether AVAudioResampleContext is open

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavresample/utils.c

@@ -254,6 +254,11 @@ error:
     return ret;
 }
 
+int avresample_is_open(AVAudioResampleContext *avr)
+{
+    return !!avr->out_fifo;
+}
+
 void avresample_close(AVAudioResampleContext *avr)
 {
     ff_audio_data_free(&avr->in_buffer);