move RTP decoders/encoders into pkt/rtpcodecs

pkg/rtpcodecs/rtplpcm/decoder_test.go

@@ -0,0 +1,108 @@
+package rtplpcm
+
+import (
+	"bytes"
+	"testing"
+	"time"
+
+	"github.com/pion/rtp"
+	"github.com/stretchr/testify/require"
+)
+
+var cases = []struct {
+	name    string
+	samples []byte
+	pts     time.Duration
+	pkts    []*rtp.Packet
+}{
+	{
+		"single",
+		[]byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06},
+		25 * time.Millisecond,
+		[]*rtp.Packet{
+			{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         false,
+					PayloadType:    96,
+					SequenceNumber: 17645,
+					Timestamp:      2289527557,
+					SSRC:           0x9dbb7812,
+				},
+				Payload: []byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06},
+			},
+		},
+	},
+	{
+		"splitted",
+		bytes.Repeat([]byte{0x41, 0x42, 0x43}, 680),
+		25 * time.Millisecond,
+		[]*rtp.Packet{
+			{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         false,
+					PayloadType:    96,
+					SequenceNumber: 17645,
+					Timestamp:      2289527557,
+					SSRC:           0x9dbb7812,
+				},
+				Payload: bytes.Repeat([]byte{0x41, 0x42, 0x43}, 486),
+			},
+			{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         false,
+					PayloadType:    96,
+					SequenceNumber: 17646,
+					Timestamp:      2289527800,
+					SSRC:           0x9dbb7812,
+				},
+				Payload: bytes.Repeat([]byte{0x41, 0x42, 0x43}, 194),
+			},
+		},
+	},
+}
+
+func TestDecode(t *testing.T) {
+	for _, ca := range cases {
+		t.Run(ca.name, func(t *testing.T) {
+			d := &Decoder{
+				BitDepth:     24,
+				SampleRate:   48000,
+				ChannelCount: 2,
+			}
+			d.Init()
+
+			// send an initial packet downstream
+			// in order to compute the right timestamp,
+			// that is relative to the initial packet
+			pkt := rtp.Packet{
+				Header: rtp.Header{
+					Version:        2,
+					Marker:         false,
+					PayloadType:    0,
+					SequenceNumber: 17645,
+					Timestamp:      2289526357,
+					SSRC:           0x9dbb7812,
+				},
+				Payload: []byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06},
+			}
+			_, _, err := d.Decode(&pkt)
+			require.NoError(t, err)
+
+			var samples []byte
+			expPTS := ca.pts
+
+			for _, pkt := range ca.pkts {
+				partial, pts, err := d.Decode(pkt)
+				require.NoError(t, err)
+				require.Equal(t, expPTS, pts)
+				samples = append(samples, partial...)
+				expPTS += time.Duration(len(partial)/(24*2/8)) * time.Second / 48000
+			}
+
+			require.Equal(t, ca.samples, samples)
+		})
+	}
+}