simplify format.Unmarshal; improve tests (#631)

pkg/format/mpeg4_audio_test.go

@@ -124,109 +124,3 @@ func TestMPEG4AudioDecEncoder(t *testing.T) {
 		require.Equal(t, [][]byte{{0x01, 0x02, 0x03, 0x04}}, byts)
 	})
 }
-
-func FuzzUnmarshalMPEG4AudioGeneric(f *testing.F) {
-	f.Fuzz(func(
-		_ *testing.T,
-		a bool,
-		b string,
-		c bool,
-		d string,
-		e bool,
-		f string,
-		g bool,
-		h string,
-		i bool,
-		j string,
-		k bool,
-		l string,
-		m bool,
-		n string,
-	) {
-		ma := map[string]string{}
-
-		if a {
-			ma["streamtype"] = b
-		}
-
-		if c {
-			ma["mode"] = d
-		}
-
-		if e {
-			ma["profile-level-id"] = f
-		}
-
-		if g {
-			ma["config"] = h
-		}
-
-		if i {
-			ma["sizelength"] = j
-		}
-
-		if k {
-			ma["indexlength"] = l
-		}
-
-		if m {
-			ma["indexdeltalength"] = n
-		}
-
-		fo, err := Unmarshal("audio", 96, "MPEG4-generic/48000/2", ma) //nolint:errcheck
-		if err == nil {
-			fo.(*MPEG4Audio).GetConfig()
-		}
-	})
-}
-
-func FuzzUnmarshalMPEG4AudioLATM(f *testing.F) {
-	f.Fuzz(func(
-		_ *testing.T,
-		a bool,
-		b string,
-		c bool,
-		d string,
-		e bool,
-		f string,
-		g bool,
-		h string,
-		i bool,
-		j string,
-		k bool,
-		l string,
-	) {
-		ma := map[string]string{}
-
-		if a {
-			ma["profile-level-id"] = b
-		}
-
-		if c {
-			ma["bitrate"] = d
-		}
-
-		if e {
-			ma["cpresent"] = f
-		}
-
-		if g {
-			ma["config"] = h
-		}
-
-		if i {
-			ma["object"] = j
-		}
-
-		if k {
-			ma["sbr-enabled"] = l
-		}
-
-		fo, err := Unmarshal("audio", 96, "MP4A-LATM/48000/2", ma)
-		if err == nil {
-			fo.(*MPEG4Audio).RTPMap()
-			fo.(*MPEG4Audio).FMTP()
-			fo.(*MPEG4Audio).GetConfig()
-		}
-	})
-}