ebiten/audio/context_js.go

// Copyright 2020 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 audio

import (
	"io"
	"syscall/js"
	"time"
)

type nullContext struct {
	sampleRate int
}

type nullPlayer struct {
	sampleRate int
}

func (c *nullContext) NewPlayer() io.WriteCloser {
	return &nullPlayer{
		sampleRate: c.sampleRate,
	}
}

func (c *nullContext) Close() error {
	return nil
}

func (p *nullPlayer) Write(data []byte) (int, error) {
	time.Sleep(time.Second * time.Duration(len(data)) / time.Duration(p.sampleRate*4))
	return len(data), nil
}

func (p *nullPlayer) Close() error {
	return nil
}

func newContextImpl(sampleRate int, initCh chan struct{}) context {
	if js.Global().Get("go2cpp").Truthy() {
		return &nullContext{
			sampleRate: sampleRate,
		}
	}

	return newOtoContext(sampleRate, initCh)
}