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45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
// Copyright 2016 Hajime Hoshi
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package vorbis
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import (
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"bytes"
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"io"
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"time"
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)
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type Stream interface {
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io.ReadSeeker
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Len() time.Duration
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}
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type stream struct {
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buf *bytes.Reader
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sampleRate int
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}
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func (s *stream) Read(p []byte) (int, error) {
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return s.buf.Read(p)
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}
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func (s *stream) Seek(offset int64, whence int) (int64, error) {
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return s.buf.Seek(offset, whence)
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}
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func (s *stream) Len() time.Duration {
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const bytesPerSample = 4
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return time.Duration(s.buf.Len()/bytesPerSample) * time.Second / time.Duration(s.sampleRate)
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}
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