func TestParseBlocks(t *testing.T) {
for i, g := range golden {
stream, err := flac.ParseFile(g.name)
if err != nil {
t.Fatal(err)
}
defer stream.Close()
blocks := stream.Blocks
if len(blocks) != len(g.blocks) {
t.Errorf("i=%d: invalid number of metadata blocks; expected %d, got %d", i, len(g.blocks), len(blocks))
continue
}
got := stream.Info
want := g.info
if !reflect.DeepEqual(got, want) {
t.Errorf("i=%d: metadata StreamInfo block bodies differ; expected %#v, got %#v", i, want, got)
}
for j, got := range blocks {
want := g.blocks[j]
if !reflect.DeepEqual(got.Header, want.Header) {
t.Errorf("i=%d, j=%d: metadata block headers differ; expected %#v, got %#v", i, j, want.Header, got.Header)
}
if !reflect.DeepEqual(got.Body, want.Body) {
t.Errorf("i=%d, j=%d: metadata block bodies differ; expected %#v, got %#v", i, j, want.Body, got.Body)
}
}
}
}
func list(path string) error {
var blockNums []int
if flagBlockNum != "" {
// Parse "--block-number" command line flag.
rawBlockNums := strings.Split(flagBlockNum, ",")
for _, rawBlockNum := range rawBlockNums {
blockNum, err := strconv.Atoi(rawBlockNum)
if err != nil {
return err
}
blockNums = append(blockNums, blockNum)
}
}
// Open FLAC stream.
stream, err := flac.ParseFile(path)
if err != nil {
return err
}
if blockNums != nil {
// Only list blocks specified in the "--block-number" command line flag.
for _, blockNum := range blockNums {
if blockNum == 0 {
listStreamInfo(stream.Info)
} else {
// strea.Blocks doesn't contain StreamInfo, therefore the blockNum
// is one less.
blockNum--
}
if blockNum < len(stream.Blocks) {
listBlock(stream.Blocks[blockNum], blockNum)
}
}
} else {
// List all blocks.
var isLast bool
if len(stream.Blocks) == 0 {
isLast = true
}
listStreamInfoHeader(isLast)
listStreamInfo(stream.Info)
for blockNum, block := range stream.Blocks {
// strea.Blocks doesn't contain StreamInfo, therefore the blockNum
// is one less.
blockNum--
listBlock(block, blockNum)
}
}
return nil
}
func TestEncode(t *testing.T) {
paths := []string{
"meta/testdata/input-SCPAP.flac",
"meta/testdata/input-SCVA.flac",
"meta/testdata/input-SCVPAP.flac",
"meta/testdata/input-VA.flac",
"meta/testdata/silence.flac",
"testdata/19875.flac",
"testdata/44127.flac",
"testdata/59996.flac",
"testdata/80574.flac",
"testdata/172960.flac",
"testdata/189983.flac",
"testdata/191885.flac",
"testdata/212768.flac",
"testdata/220014.flac",
"testdata/243749.flac",
"testdata/256529.flac",
"testdata/257344.flac",
"testdata/love.flac",
}
for _, path := range paths {
// Decode source file.
stream, err := flac.ParseFile(path)
if err != nil {
t.Errorf("%q: unable to parse FLAC file; %v", path, err)
continue
}
defer stream.Close()
// Encode FLAC stream.
out := new(bytes.Buffer)
if err := flac.Encode(out, stream); err != nil {
t.Errorf("%q: unable to encode FLAC stream; %v", path, err)
continue
}
// Compare source and destination FLAC streams.
want, err := ioutil.ReadFile(path)
if err != nil {
t.Errorf("%q: unable to read file; %v", path, err)
continue
}
got := out.Bytes()
if !bytes.Equal(got, want) {
t.Errorf("%q: content mismatch; expected % X, got % X", path, want, got)
continue
}
}
}
func ExampleParseFile() {
// Parse metadata of love.flac
stream, err := flac.ParseFile("testdata/love.flac")
if err != nil {
log.Fatal(err)
}
defer stream.Close()
fmt.Printf("unencoded audio md5sum: %032x\n", stream.Info.MD5sum[:])
for i, block := range stream.Blocks {
fmt.Printf("block %d: %v\n", i, block.Type)
}
// Output:
// unencoded audio md5sum: bdf6f7d31f77cb696a02b2192d192a89
// block 0: seek table
// block 1: vorbis comment
// block 2: padding
}
func TestEncodeComment(t *testing.T) {
// Decode FLAC file.
src, err := flac.ParseFile("testdata/love.flac")
if err != nil {
t.Fatalf("unable to parse input FLAC file; %v", err)
}
defer src.Close()
// Add custom vorbis comment.
const want = "FLAC encoding test case"
for _, block := range src.Blocks {
if comment, ok := block.Body.(*meta.VorbisComment); ok {
comment.Vendor = want
}
}
// Encode FLAC file.
out := new(bytes.Buffer)
if err := flac.Encode(out, src); err != nil {
t.Fatalf("unable to encode FLAC file; %v", err)
}
stream, err := flac.Parse(out)
if err != nil {
t.Fatalf("unable to parse output FLAC file; %v", err)
}
defer stream.Close()
// Add custom vorbis comment.
for _, block := range stream.Blocks {
if comment, ok := block.Body.(*meta.VorbisComment); ok {
got := comment.Vendor
if got != want {
t.Errorf("Vorbis comment mismatch; expected %q, got %q", want, got)
continue
}
}
}
}
func TestParsePicture(t *testing.T) {
stream, err := flac.ParseFile("testdata/silence.flac")
if err != nil {
t.Fatal(err)
}
defer stream.Close()
want, err := ioutil.ReadFile("testdata/silence.jpg")
if err != nil {
t.Fatal(err)
}
for _, block := range stream.Blocks {
if block.Type == meta.TypePicture {
pic := block.Body.(*meta.Picture)
got := pic.Data
if !bytes.Equal(got, want) {
t.Errorf("picture data differ; expected %v, got %v", want, got)
}
break
}
}
}
// TODO: better error verification than string-based comparisons.
func TestMissingValue(t *testing.T) {
_, err := flac.ParseFile("testdata/missing-value.flac")
if err.Error() != `meta.Block.parseVorbisComment: unable to locate '=' in vector "title 2"` {
t.Fatal(err)
}
}