mirror of
https://github.com/hajimehoshi/ebiten.git
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64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
// Copyright 2021 The Ebiten Authors
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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 readerdriver
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import (
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"io"
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)
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type Context interface {
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NewPlayer(io.Reader) Player
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Suspend() error
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Resume() error
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}
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type Player interface {
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Pause()
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Play()
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IsPlaying() bool
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Reset()
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Volume() float64
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SetVolume(volume float64)
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UnplayedBufferSize() int
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Err() error
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io.Closer
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}
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type playerState int
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const (
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playerPaused playerState = iota
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playerPlay
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playerClosed
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)
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// TODO: The term 'buffer' is confusing. Name each buffer with good terms.
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// oneBufferSize returns the size of one buffer in the player implementation.
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func (c *context) oneBufferSize() int {
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bytesPerSample := c.channelNum * c.bitDepthInBytes
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s := c.sampleRate * bytesPerSample / 4
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// Align s in multiples of bytes per sample, or a buffer could have extra bytes.
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return s / bytesPerSample * bytesPerSample
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}
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// maxBufferSize returns the maximum size of the buffer for the audio source.
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// This buffer is used when unreading on pausing the player.
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func (c *context) maxBufferSize() int {
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// The number of underlying buffers should be 2.
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return c.oneBufferSize() * 2
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}
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