Add a 'resume' metadata tag for when the stream is about to play

player.c

@@ -562,6 +562,9 @@ static abuf_t *buffer_get_frame(void) {
                 // debug(1,"Exact frame gap is %llu; play %d frames of silence. Dac_delay is %d, with %d packets.",exact_frame_gap,fs,dac_delay,seq_diff(ab_read, ab_write));
                 config.output->play(silence, fs);
                 free(silence);
+                if (ab_buffering==0) {
+                  send_ssnc_metadata('prsm',NULL,0); // "resume"
+                }
               }
             }
           }

rtsp.c

@@ -789,10 +789,11 @@ static void handle_set_parameter_parameter(rtsp_conn_info *conn,
 //    'pbeg' -- play stream begin. No arguments
 //    'pend' -- play stream end. No arguments
 //    'pfls' -- play stream flush. No arguments
+//    'prsm' -- play stream resume. No arguments
 //    'pvol' -- play volume. The volume is sent as a string.
 //    'mdst' -- a sequence of metadata is about to start
 //    'mden' -- a sequence of metadata has ended
-//    'snam' -- the name of the originator -- e.g. "Joe's iPhone" or "iTunes". The UTF-8 string and its length are passed is a malloc'ed block
+//    'snam' -- the name of the originator -- e.g. "Joe's iPhone" or "iTunes...".
 //    
 // including a simple base64 encoder to minimise malloc/free activity