ebiten/audio/mp3/decode.go
2017-06-12 23:32:42 +09:00

61 lines
1.5 KiB
Go

// Copyright 2017 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package mp3 provides MP3 decoder.
//
// This package is very experimental.
package mp3
import (
"bytes"
"github.com/hajimehoshi/ebiten/audio"
)
type Stream struct {
inner *bytes.Reader
}
// Read is implementation of io.Reader's Read.
func (s *Stream) Read(p []byte) (int, error) {
return s.inner.Read(p)
}
// Seek is implementation of io.Seeker's Seek.
func (s *Stream) Seek(offset int64, whence int) (int64, error) {
return s.inner.Seek(offset, whence)
}
// Read is implementation of io.Closer's Close.
func (s *Stream) Close() error {
return nil
}
// Size returns the size of decoded stream in bytes.
func (s *Stream) Size() int64 {
return int64(s.inner.Len())
}
func Decode(context *audio.Context, src audio.ReadSeekCloser) (*Stream, error) {
var buf bytes.Buffer
if err := decode(src, &buf); err != nil {
return nil, err
}
s := &Stream{
inner: bytes.NewReader(buf.Bytes()),
}
// TODO: Resampling
return s, nil
}