Divide box_types.go by specification #139

box_types_3gpp.go

@@ -0,0 +1,24 @@
+package mp4
+
+var udta3GppMetaBoxTypes = []BoxType{
+	StrToBoxType("titl"),
+	StrToBoxType("dscp"),
+	StrToBoxType("cprt"),
+	StrToBoxType("perf"),
+	StrToBoxType("auth"),
+	StrToBoxType("gnre"),
+}
+
+func init() {
+	for _, bt := range udta3GppMetaBoxTypes {
+		AddAnyTypeBoxDefEx(&Udta3GppString{}, bt, isUnderUdta, 0)
+	}
+}
+
+type Udta3GppString struct {
+	AnyTypeBox
+	FullBox  `mp4:"0,extend"`
+	Pad      bool    `mp4:"1,size=1,hidden"`
+	Language [3]byte `mp4:"2,size=5,iso639-2"` // ISO-639-2/T language code
+	Data     []byte  `mp4:"3,size=8,string"`
+}

box_types_3gpp_test.go

@@ -0,0 +1,75 @@
+package mp4
+
+import (
+	"bytes"
+	"io"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestBoxTypes3GPP(t *testing.T) {
+	testCases := []struct {
+		name string
+		src  IImmutableBox
+		dst  IBox
+		bin  []byte
+		str  string
+		ctx  Context
+	}{
+		{
+			name: "udta 3gpp string",
+			src: &Udta3GppString{
+				AnyTypeBox: AnyTypeBox{Type: StrToBoxType("titl")},
+				Language:   [3]byte{0x5, 0xe, 0x7},
+				Data:       []byte("SING"),
+			},
+			dst: &Udta3GppString{
+				AnyTypeBox: AnyTypeBox{Type: StrToBoxType("titl")},
+			},
+			bin: []byte{
+				0,                // version
+				0x00, 0x00, 0x00, // flags
+				0x15, 0xc7, // language
+				0x53, 0x49, 0x4e, 0x47, // data
+			},
+			str: `Version=0 Flags=0x000000 Language="eng" Data="SING"`,
+			ctx: Context{UnderUdta: true},
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Marshal
+			buf := bytes.NewBuffer(nil)
+			n, err := Marshal(buf, tc.src, tc.ctx)
+			require.NoError(t, err)
+			assert.Equal(t, uint64(len(tc.bin)), n)
+			assert.Equal(t, tc.bin, buf.Bytes())
+
+			// Unmarshal
+			r := bytes.NewReader(tc.bin)
+			n, err = Unmarshal(r, uint64(len(tc.bin)), tc.dst, tc.ctx)
+			require.NoError(t, err)
+			assert.Equal(t, uint64(buf.Len()), n)
+			assert.Equal(t, tc.src, tc.dst)
+			s, err := r.Seek(0, io.SeekCurrent)
+			require.NoError(t, err)
+			assert.Equal(t, int64(buf.Len()), s)
+
+			// UnmarshalAny
+			dst, n, err := UnmarshalAny(bytes.NewReader(tc.bin), tc.src.GetType(), uint64(len(tc.bin)), tc.ctx)
+			require.NoError(t, err)
+			assert.Equal(t, uint64(buf.Len()), n)
+			assert.Equal(t, tc.src, dst)
+			s, err = r.Seek(0, io.SeekCurrent)
+			require.NoError(t, err)
+			assert.Equal(t, int64(buf.Len()), s)
+
+			// Stringify
+			str, err := Stringify(tc.src, tc.ctx)
+			require.NoError(t, err)
+			assert.Equal(t, tc.str, str)
+		})
+	}
+}