diff options
Diffstat (limited to 'vendor/github.com/abema/go-mp4/field.go')
| -rw-r--r-- | vendor/github.com/abema/go-mp4/field.go | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/vendor/github.com/abema/go-mp4/field.go b/vendor/github.com/abema/go-mp4/field.go deleted file mode 100644 index 585833e0d..000000000 --- a/vendor/github.com/abema/go-mp4/field.go +++ /dev/null @@ -1,290 +0,0 @@ -package mp4 - -import ( - "fmt" - "os" - "reflect" - "sort" - "strconv" - "strings" -) - -type ( - stringType uint8 - fieldFlag uint16 -) - -const ( - stringType_C stringType = iota - stringType_C_P - - fieldString fieldFlag = 1 << iota // 0 - fieldExtend // 1 - fieldDec // 2 - fieldHex // 3 - fieldISO639_2 // 4 - fieldUUID // 5 - fieldHidden // 6 - fieldOptDynamic // 7 - fieldVarint // 8 - fieldSizeDynamic // 9 - fieldLengthDynamic // 10 -) - -type field struct { - children []*field - name string - cnst string - order int - optFlag uint32 - nOptFlag uint32 - size uint - length uint - flags fieldFlag - strType stringType - version uint8 - nVersion uint8 -} - -func (f *field) set(flag fieldFlag) { - f.flags |= flag -} - -func (f *field) is(flag fieldFlag) bool { - return f.flags&flag != 0 -} - -func buildFields(box IImmutableBox) []*field { - t := reflect.TypeOf(box).Elem() - return buildFieldsStruct(t) -} - -func buildFieldsStruct(t reflect.Type) []*field { - fs := make([]*field, 0, 8) - for i := 0; i < t.NumField(); i++ { - ft := t.Field(i).Type - tag, ok := t.Field(i).Tag.Lookup("mp4") - if !ok { - continue - } - f := buildField(t.Field(i).Name, tag) - f.children = buildFieldsAny(ft) - fs = append(fs, f) - } - sort.SliceStable(fs, func(i, j int) bool { - return fs[i].order < fs[j].order - }) - return fs -} - -func buildFieldsAny(t reflect.Type) []*field { - switch t.Kind() { - case reflect.Struct: - return buildFieldsStruct(t) - case reflect.Ptr, reflect.Array, reflect.Slice: - return buildFieldsAny(t.Elem()) - default: - return nil - } -} - -func buildField(fieldName string, tag string) *field { - f := &field{ - name: fieldName, - } - tagMap := parseFieldTag(tag) - for key, val := range tagMap { - if val != "" { - continue - } - if order, err := strconv.Atoi(key); err == nil { - f.order = order - break - } - } - - if val, contained := tagMap["string"]; contained { - f.set(fieldString) - if val == "c_p" { - f.strType = stringType_C_P - fmt.Fprint(os.Stderr, "go-mp4: string=c_p tag is deprecated!! See https://github.com/abema/go-mp4/issues/76\n") - } - } - - if _, contained := tagMap["varint"]; contained { - f.set(fieldVarint) - } - - if val, contained := tagMap["opt"]; contained { - if val == "dynamic" { - f.set(fieldOptDynamic) - } else { - base := 10 - if strings.HasPrefix(val, "0x") { - val = val[2:] - base = 16 - } - opt, err := strconv.ParseUint(val, base, 32) - if err != nil { - panic(err) - } - f.optFlag = uint32(opt) - } - } - - if val, contained := tagMap["nopt"]; contained { - base := 10 - if strings.HasPrefix(val, "0x") { - val = val[2:] - base = 16 - } - nopt, err := strconv.ParseUint(val, base, 32) - if err != nil { - panic(err) - } - f.nOptFlag = uint32(nopt) - } - - if _, contained := tagMap["extend"]; contained { - f.set(fieldExtend) - } - - if _, contained := tagMap["dec"]; contained { - f.set(fieldDec) - } - - if _, contained := tagMap["hex"]; contained { - f.set(fieldHex) - } - - if _, contained := tagMap["iso639-2"]; contained { - f.set(fieldISO639_2) - } - - if _, contained := tagMap["uuid"]; contained { - f.set(fieldUUID) - } - - if _, contained := tagMap["hidden"]; contained { - f.set(fieldHidden) - } - - if val, contained := tagMap["const"]; contained { - f.cnst = val - } - - f.version = anyVersion - if val, contained := tagMap["ver"]; contained { - ver, err := strconv.Atoi(val) - if err != nil { - panic(err) - } - f.version = uint8(ver) - } - - f.nVersion = anyVersion - if val, contained := tagMap["nver"]; contained { - ver, err := strconv.Atoi(val) - if err != nil { - panic(err) - } - f.nVersion = uint8(ver) - } - - if val, contained := tagMap["size"]; contained { - if val == "dynamic" { - f.set(fieldSizeDynamic) - } else { - size, err := strconv.ParseUint(val, 10, 32) - if err != nil { - panic(err) - } - f.size = uint(size) - } - } - - f.length = LengthUnlimited - if val, contained := tagMap["len"]; contained { - if val == "dynamic" { - f.set(fieldLengthDynamic) - } else { - l, err := strconv.ParseUint(val, 10, 32) - if err != nil { - panic(err) - } - f.length = uint(l) - } - } - - return f -} - -func parseFieldTag(str string) map[string]string { - tag := make(map[string]string, 8) - - list := strings.Split(str, ",") - for _, e := range list { - kv := strings.SplitN(e, "=", 2) - if len(kv) == 2 { - tag[strings.Trim(kv[0], " ")] = strings.Trim(kv[1], " ") - } else { - tag[strings.Trim(kv[0], " ")] = "" - } - } - - return tag -} - -type fieldInstance struct { - field - cfo ICustomFieldObject -} - -func resolveFieldInstance(f *field, box IImmutableBox, parent reflect.Value, ctx Context) *fieldInstance { - fi := fieldInstance{ - field: *f, - } - - cfo, ok := parent.Addr().Interface().(ICustomFieldObject) - if ok { - fi.cfo = cfo - } else { - fi.cfo = box - } - - if fi.is(fieldSizeDynamic) { - fi.size = fi.cfo.GetFieldSize(f.name, ctx) - } - - if fi.is(fieldLengthDynamic) { - fi.length = fi.cfo.GetFieldLength(f.name, ctx) - } - - return &fi -} - -func isTargetField(box IImmutableBox, fi *fieldInstance, ctx Context) bool { - if box.GetVersion() != anyVersion { - if fi.version != anyVersion && box.GetVersion() != fi.version { - return false - } - - if fi.nVersion != anyVersion && box.GetVersion() == fi.nVersion { - return false - } - } - - if fi.optFlag != 0 && box.GetFlags()&fi.optFlag == 0 { - return false - } - - if fi.nOptFlag != 0 && box.GetFlags()&fi.nOptFlag != 0 { - return false - } - - if fi.is(fieldOptDynamic) && !fi.cfo.IsOptFieldEnabled(fi.name, ctx) { - return false - } - - return true -} |