Tests for nack stream filter

pion · Oct 2, 2024 · 8edb5c7 · 8edb5c7
1 parent ed32ece
commit 8edb5c7
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diff --git a/pkg/nack/generator_interceptor_test.go b/pkg/nack/generator_interceptor_test.go
@@ -76,3 +76,60 @@ func TestGeneratorInterceptor_InvalidSize(t *testing.T) {
 	_, err := f.NewInterceptor("")
 	assert.Error(t, err, ErrInvalidSize)
 }
+
+func TestGeneratorInterceptor_StreamFilter(t *testing.T) {
+	const interval = time.Millisecond * 10
+	f, err := NewGeneratorInterceptor(
+		GeneratorSize(64),
+		GeneratorSkipLastN(2),
+		GeneratorInterval(interval),
+		GeneratorLog(logging.NewDefaultLoggerFactory().NewLogger("test")),
+		GeneratorStreamsFilter(func(info *interceptor.StreamInfo) bool {
+			return info.SSRC != 1 // enable nacks only for ssrc 2
+		}),
+	)
+	assert.NoError(t, err)
+
+	i, err := f.NewInterceptor("")
+	assert.NoError(t, err)
+
+	streamWithoutNacks := test.NewMockStream(&interceptor.StreamInfo{
+		SSRC:         1,
+		RTCPFeedback: []interceptor.RTCPFeedback{{Type: "nack"}},
+	}, i)
+	defer func() {
+		assert.NoError(t, streamWithoutNacks.Close())
+	}()
+
+	streamWithNacks := test.NewMockStream(&interceptor.StreamInfo{
+		SSRC:         2,
+		RTCPFeedback: []interceptor.RTCPFeedback{{Type: "nack"}},
+	}, i)
+	defer func() {
+		assert.NoError(t, streamWithNacks.Close())
+	}()
+
+	for _, seqNum := range []uint16{10, 11, 12, 14, 16, 18} {
+		streamWithNacks.ReceiveRTP(&rtp.Packet{Header: rtp.Header{SequenceNumber: seqNum}})
+		streamWithoutNacks.ReceiveRTP(&rtp.Packet{Header: rtp.Header{SequenceNumber: seqNum}})
+	}
+
+	time.Sleep(interval * 2) // wait for at least 2 nack packets
+
+	// both test streams receive RTCP packets about both test streams (as they both call BindRTCPWriter), so we
+	// can check only one
+	rtcpStream := streamWithNacks.WrittenRTCP()
+
+	for {
+		select {
+		case pkts := <-rtcpStream:
+			for _, pkt := range pkts {
+				if nack, isNack := pkt.(*rtcp.TransportLayerNack); isNack {
+					assert.NotEqual(t, uint32(2), nack.MediaSSRC) // check there are no nacks for ssrc 1
+				}
+			}
+		default:
+			return
+		}
+	}
+}
diff --git a/pkg/nack/responder_interceptor_test.go b/pkg/nack/responder_interceptor_test.go
@@ -150,3 +150,84 @@ func TestResponderInterceptor_Race(t *testing.T) {
 		}
 	}
 }
+
+func TestResponderInterceptor_StreamFilter(t *testing.T) {
+	f, err := NewResponderInterceptor(
+		ResponderSize(8),
+		ResponderLog(logging.NewDefaultLoggerFactory().NewLogger("test")),
+		ResponderStreamsFilter(func(info *interceptor.StreamInfo) bool {
+			return info.SSRC != 1 // enable nacks only for ssrc 2
+		}))
+
+	require.NoError(t, err)
+
+	i, err := f.NewInterceptor("")
+	require.NoError(t, err)
+
+	streamWithoutNacks := test.NewMockStream(&interceptor.StreamInfo{
+		SSRC:         1,
+		RTCPFeedback: []interceptor.RTCPFeedback{{Type: "nack"}},
+	}, i)
+	defer func() {
+		require.NoError(t, streamWithoutNacks.Close())
+	}()
+
+	streamWithNacks := test.NewMockStream(&interceptor.StreamInfo{
+		SSRC:         2,
+		RTCPFeedback: []interceptor.RTCPFeedback{{Type: "nack"}},
+	}, i)
+	defer func() {
+		require.NoError(t, streamWithNacks.Close())
+	}()
+
+	for _, seqNum := range []uint16{10, 11, 12, 14, 15} {
+		require.NoError(t, streamWithoutNacks.WriteRTP(&rtp.Packet{Header: rtp.Header{SequenceNumber: seqNum, SSRC: 1}}))
+		require.NoError(t, streamWithNacks.WriteRTP(&rtp.Packet{Header: rtp.Header{SequenceNumber: seqNum, SSRC: 2}}))
+
+		select {
+		case p := <-streamWithoutNacks.WrittenRTP():
+			require.Equal(t, seqNum, p.SequenceNumber)
+		case <-time.After(10 * time.Millisecond):
+			t.Fatal("written rtp packet not found")
+		}
+
+		select {
+		case p := <-streamWithNacks.WrittenRTP():
+			require.Equal(t, seqNum, p.SequenceNumber)
+		case <-time.After(10 * time.Millisecond):
+			t.Fatal("written rtp packet not found")
+		}
+	}
+
+	streamWithoutNacks.ReceiveRTCP([]rtcp.Packet{
+		&rtcp.TransportLayerNack{
+			MediaSSRC:  1,
+			SenderSSRC: 2,
+			Nacks: []rtcp.NackPair{
+				{PacketID: 11, LostPackets: 0b1011}, // sequence numbers: 11, 12, 13, 15
+			},
+		},
+	})
+
+	streamWithNacks.ReceiveRTCP([]rtcp.Packet{
+		&rtcp.TransportLayerNack{
+			MediaSSRC:  2,
+			SenderSSRC: 2,
+			Nacks: []rtcp.NackPair{
+				{PacketID: 11, LostPackets: 0b1011}, // sequence numbers: 11, 12, 13, 15
+			},
+		},
+	})
+
+	select {
+	case <-streamWithNacks.WrittenRTP():
+	case <-time.After(10 * time.Millisecond):
+		t.Fatal("nack response expected")
+	}
+
+	select {
+	case <-streamWithoutNacks.WrittenRTP():
+		t.Fatal("no nack response expected")
+	case <-time.After(10 * time.Millisecond):
+	}
+}