ebiten/exp/audio/vorbis/vorbis.go
2016-03-18 02:42:47 +09:00

53 lines
1.4 KiB
Go

// Copyright 2016 Hajime Hoshi
//
// 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.
// +build !js
package vorbis
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"github.com/hajimehoshi/ebiten/exp/audio"
"github.com/hajimehoshi/go-vorbis"
)
func Decode(context *audio.Context, src io.Reader) (Stream, error) {
decoded, channels, sampleRate, err := vorbis.Decode(src)
if err != nil {
return nil, err
}
if channels != 2 {
return nil, errors.New("audio: number of channels must be 2")
}
if sampleRate != context.SampleRate() {
return nil, fmt.Errorf("audio: sample rate must be %d but %d", context.SampleRate(), sampleRate)
}
// TODO: Read all data once so that Seek can be implemented easily.
// We should look for a wiser way.
b, err := ioutil.ReadAll(decoded)
if err != nil {
return nil, err
}
s := &stream{
buf: bytes.NewReader(b),
sampleRate: sampleRate,
}
return s, nil
}