infer object, sample rate, clock of MPEG4AudioLATM from config (#255)

pkg/formats/mpeg4_audio_latm_test.go

@@ -3,6 +3,7 @@ package formats
 import (
 	"testing"
 
+	"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4audio"
 	"github.com/pion/rtp"
 	"github.com/stretchr/testify/require"
 )
@@ -10,13 +11,21 @@ import (
 func TestMPEG4AudioLATMAttributes(t *testing.T) {
 	format := &MPEG4AudioLATM{
 		PayloadTyp:     96,
-		SampleRate:     48000,
-		Channels:       2,
-		Object:         2,
 		ProfileLevelID: 1,
-		Config:         []byte{0x01, 0x02, 0x03},
+		Config: &mpeg4audio.StreamMuxConfig{
+			Programs: []*mpeg4audio.StreamMuxConfigProgram{{
+				Layers: []*mpeg4audio.StreamMuxConfigLayer{{
+					AudioSpecificConfig: &mpeg4audio.Config{
+						Type:         2,
+						SampleRate:   44100,
+						ChannelCount: 2,
+					},
+					LatmBufferFullness: 255,
+				}},
+			}},
+		},
 	}
 	require.Equal(t, "MPEG4-audio-latm", format.String())
-	require.Equal(t, 48000, format.ClockRate())
+	require.Equal(t, 44100, format.ClockRate())
 	require.Equal(t, true, format.PTSEqualsDTS(&rtp.Packet{}))
 }