protocol/rtp: Client.ErrChan => Client.err and wrote accessor function Client.Err() to access this chan as only receive

protocol/rtp/client.go

@@ -56,13 +56,13 @@ type log func(lvl int8, msg string, args ...interface{})
 // Client describes an RTP client that can receive an RTP stream and implements
 // io.Reader.
 type Client struct {
-	conn    *net.UDPConn                 // The UDP connection RTP packets will be read from.
-	wg      sync.WaitGroup               // Used to wait for recv routine to finish.
-	done    chan struct{}                // Used to terminate the recv routine.
-	ring    *ring.Buffer                 // Processed data from RTP packets will be stored here.
-	op      func([]byte) ([]byte, error) // The operation to perform on received RTP packets before storing.
-	ErrChan chan error                   // Errors encountered during recv will be sent to this chan.
-	rt      time.Duration                // Read timeout used when reading from the ringbuffer.
+	conn *net.UDPConn                 // The UDP connection RTP packets will be read from.
+	wg   sync.WaitGroup               // Used to wait for recv routine to finish.
+	done chan struct{}                // Used to terminate the recv routine.
+	ring *ring.Buffer                 // Processed data from RTP packets will be stored here.
+	op   func([]byte) ([]byte, error) // The operation to perform on received RTP packets before storing.
+	err  chan error                   // Errors encountered during recv will be sent to this chan.
+	rt   time.Duration                // Read timeout used when reading from the ringbuffer.
 	log
 }
 
@@ -77,12 +77,12 @@ type Client struct {
 // reading from the client ringbuffer.
 func NewClient(addr string, op func([]byte) ([]byte, error), l log, rt time.Duration) (*Client, error) {
 	c := &Client{
-		done:    make(chan struct{}, chanSize),
-		ring:    ring.NewBuffer(ringBufferSize, ringBufferElementSize, 0),
-		op:      op,
-		log:     l,
-		ErrChan: make(chan error),
-		rt:      rt,
+		done: make(chan struct{}, chanSize),
+		ring: ring.NewBuffer(ringBufferSize, ringBufferElementSize, 0),
+		op:   op,
+		log:  l,
+		err:  make(chan error),
+		rt:   rt,
 	}
 
 	a, err := net.ResolveUDPAddr("udp", addr)
@@ -114,6 +114,10 @@ func (c *Client) Stop() {
 	c.wg.Wait()
 }
 
+func (c *Client) Err() <-chan error {
+	return c.err
+}
+
 // recv will read RTP packets from the UDP connection, perform the operation
 // on them given at creation of the Client and then store the result in the
 // ringBuffer for Reading.
@@ -129,7 +133,7 @@ func (c *Client) recv() {
 			c.log(logger.Debug, pkg+"waiting for packet")
 			n, _, err := c.conn.ReadFromUDP(buf)
 			if err != nil {
-				c.ErrChan <- err
+				c.err <- err
 				continue
 			}
 			c.log(logger.Debug, pkg+"packet received", "packet", buf[:n])
@@ -141,7 +145,7 @@ func (c *Client) recv() {
 			default:
 				_buf, err = c.op(buf[:n])
 				if err != nil {
-					c.ErrChan <- err
+					c.err <- err
 					continue
 				}
 			}
@@ -149,7 +153,7 @@ func (c *Client) recv() {
 			_, err = c.ring.Write(_buf)
 			c.ring.Flush()
 			if err != nil {
-				c.ErrChan <- err
+				c.err <- err
 				continue
 			}
 		}

protocol/rtp/client_test.go

@@ -86,7 +86,7 @@ func TestReceive(t *testing.T) {
 		// Log any errors from client.
 		go func() {
 			for {
-				err := <-c.ErrChan
+				err := <-c.Err()
 				t.Logf("unexpected error from client: %v", err)
 			}
 		}()