mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 12:18:55 +01:00
64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
// Copyright 2021 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 readerdriver
|
|
|
|
import (
|
|
"io"
|
|
)
|
|
|
|
type Context interface {
|
|
NewPlayer(io.Reader) Player
|
|
Suspend() error
|
|
Resume() error
|
|
}
|
|
|
|
type Player interface {
|
|
Pause()
|
|
Play()
|
|
IsPlaying() bool
|
|
Reset()
|
|
Volume() float64
|
|
SetVolume(volume float64)
|
|
UnplayedBufferSize() int64
|
|
Err() error
|
|
io.Closer
|
|
}
|
|
|
|
type playerState int
|
|
|
|
const (
|
|
playerPaused playerState = iota
|
|
playerPlay
|
|
playerClosed
|
|
)
|
|
|
|
// TODO: The term 'buffer' is confusing. Name each buffer with good terms.
|
|
|
|
// oneBufferSize returns the size of one buffer in the player implementation.
|
|
func (c *context) oneBufferSize() int {
|
|
bytesPerSample := c.channelNum * c.bitDepthInBytes
|
|
s := c.sampleRate * bytesPerSample / 4
|
|
|
|
// Align s in multiples of bytes per sample, or a buffer could have extra bytes.
|
|
return s / bytesPerSample * bytesPerSample
|
|
}
|
|
|
|
// maxBufferSize returns the maximum size of the buffer for the audio source.
|
|
// This buffer is used when unreading on pausing the player.
|
|
func (c *context) maxBufferSize() int {
|
|
// The number of underlying buffers should be 2.
|
|
return c.oneBufferSize() * 2
|
|
}
|