ebiten/audio/internal/cbackend/context.go
2021-12-23 22:20:04 +09:00

68 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.
//go:build ebitencbackend
// +build ebitencbackend
package cbackend
import (
"io"
"github.com/hajimehoshi/ebiten/v2/internal/cbackend"
)
type Context struct {
sampleRate int
channelNum int
bitDepthInBytes int
players *players
}
func NewContext(sampleRate, channelNum, bitDepthInBytes int) (*Context, chan struct{}, error) {
c := &Context{
sampleRate: sampleRate,
channelNum: channelNum,
bitDepthInBytes: bitDepthInBytes,
players: newPlayers(),
}
cbackend.OpenAudio(sampleRate, channelNum, c.players.read)
ready := make(chan struct{})
close(ready)
return c, ready, nil
}
func (c *Context) NewPlayer(src io.Reader) *Player {
return newPlayer(c, src)
}
func (c *Context) Suspend() error {
// Do nothing so far.
return nil
}
func (c *Context) Resume() error {
// Do nothing so far.
return nil
}
func (c *Context) Err() error {
return nil
}
func (c *Context) bufferSize() int {
return c.sampleRate * c.channelNum * c.bitDepthInBytes / 4 // 0.25[s]
}