// Copyright 2017 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.

// +build js

package audio

import (
	"github.com/hajimehoshi/ebiten/internal/web"
)

func (c *Context) bufferSize() int {
	n := 10
	if !web.IsMobileBrowser() {
		// TODO: On Chrome and Firefox, 1/30[s] doesn't work with 24000 or 48000 [Hz]
		// at least on macOS.
		switch c.sampleRate {
		case 44100, 88200:
			n = 30
		case 22050:
			// #434
			n = 15
		case 24000, 48000:
			n = 20
		default:
			n = 15
		}
	}
	return c.sampleRate * channelNum * bytesPerSample / n
}