dec3_test.go

package mp4

import (
	"encoding/hex"
	"testing"

	"github.com/Eyevinn/mp4ff/bits"
)

func TestEncDecDec3(t *testing.T) {
	b := &Dec3Box{DataRate: 448,
		NumIndSub: 0,
		EC3Subs: []EC3Sub{
			{FSCod: 2}},
		Reserved: []byte{}}
	boxDiffAfterEncodeAndDecode(t, b)
}

func TestGetChannelInfoDec3(t *testing.T) {
	testCases := []struct {
		name             string
		hexIn            string
		wantedNrChannels int
		wantedChannelMap uint16
	}{
		{
			name:             "7+1",
			hexIn:            "0000000e646563330c00200f0202",
			wantedNrChannels: 8,
			wantedChannelMap: 0xfa01,
		},
		{
			name:             "5+1",
			hexIn:            "0000000d646563330800200f00",
			wantedNrChannels: 6,
			wantedChannelMap: 0xf801,
		},
		{
			name:             "2+0",
			hexIn:            "0000000d646563330400200400",
			wantedNrChannels: 2,
			wantedChannelMap: 0xa000,
		},
	}
	for _, tc := range testCases {
		dec3Bytes, err := hex.DecodeString(tc.hexIn)
		if err != nil {
			t.Error(err)
		}
		sr := bits.NewFixedSliceReader(dec3Bytes)
		box, err := DecodeBoxSR(0, sr)
		if err != nil {
			t.Error(err)
		}
		dec3 := box.(*Dec3Box)
		gotNrChannels, gotChanmap := dec3.ChannelInfo()
		if gotNrChannels != tc.wantedNrChannels {
			t.Errorf("got %d channels instead of %d", gotNrChannels, tc.wantedNrChannels)
		}
		if gotChanmap != tc.wantedChannelMap {
			t.Errorf("got chanmap %d instead of %d", gotChanmap, tc.wantedChannelMap)
		}
	}
}