mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 04:57:26 +01:00
audio: refactoring: remove audio/internal/cbackend
This commit is contained in:
Hajime Hoshi
parent
2826555044
commit
2b248ef783
@ -20,20 +20,40 @@ package audio
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import (
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"io"
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"github.com/hajimehoshi/ebiten/v2/audio/internal/cbackend"
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"github.com/hajimehoshi/oto/v2/mux"
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"github.com/hajimehoshi/ebiten/v2/internal/cbackend"
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)
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func newContext(sampleRate, channelCount, bitDepthInBytes int) (context, chan struct{}, error) {
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ctx, ready, err := cbackend.NewContext(sampleRate, channelCount, bitDepthInBytes)
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return &contextProxy{ctx}, ready, err
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ready := make(chan struct{})
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close(ready)
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c := &contextProxy{mux.New(sampleRate, channelCount, bitDepthInBytes)}
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cbackend.OpenAudio(sampleRate, channelCount, c.mux.ReadFloat32s)
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return c, ready, nil
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}
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// contextProxy is a proxy between cbackend.Context and context.
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type contextProxy struct {
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*cbackend.Context
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mux *mux.Mux
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}
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// NewPlayer implements context.
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func (c *contextProxy) NewPlayer(r io.Reader) player {
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return c.Context.NewPlayer(r)
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return c.mux.NewPlayer(r)
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}
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func (c *contextProxy) Suspend() error {
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// Do nothing so far.
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return nil
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}
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func (c *contextProxy) Resume() error {
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// Do nothing so far.
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return nil
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}
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func (c *contextProxy) Err() error {
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return nil
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}
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@ -1,67 +0,0 @@
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// 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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//go:build ebitenginecbackend || ebitencbackend
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// +build ebitenginecbackend ebitencbackend
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package cbackend
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import (
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"io"
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"github.com/hajimehoshi/ebiten/v2/internal/cbackend"
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)
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type Context struct {
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sampleRate int
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channelCount int
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bitDepthInBytes int
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players *players
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}
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func NewContext(sampleRate, channelCount, bitDepthInBytes int) (*Context, chan struct{}, error) {
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c := &Context{
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sampleRate: sampleRate,
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channelCount: channelCount,
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bitDepthInBytes: bitDepthInBytes,
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players: newPlayers(),
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}
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cbackend.OpenAudio(sampleRate, channelCount, c.players.read)
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ready := make(chan struct{})
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close(ready)
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return c, ready, nil
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}
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func (c *Context) NewPlayer(src io.Reader) *Player {
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return newPlayer(c, src)
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}
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func (c *Context) Suspend() error {
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// Do nothing so far.
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return nil
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}
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func (c *Context) Resume() error {
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// Do nothing so far.
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return nil
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}
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func (c *Context) Err() error {
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return nil
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}
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func (c *Context) defaultBufferSize() int {
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return c.sampleRate * c.channelCount * c.bitDepthInBytes / 2 // 0.5[s]
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}
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@ -1,435 +0,0 @@
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// 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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//go:build ebitenginecbackend || ebitencbackend
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// +build ebitenginecbackend ebitencbackend
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// TODO: This implementation is very similar to github.com/hajimehoshi/oto/v2's player.go
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// Unify them if possible.
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package cbackend
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import (
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"errors"
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"io"
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"runtime"
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"sync"
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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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type players struct {
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players map[*playerImpl]struct{}
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buf []float32
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cond *sync.Cond
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}
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func newPlayers() *players {
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p := &players{
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cond: sync.NewCond(&sync.Mutex{}),
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}
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go p.loop()
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return p
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}
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func (ps *players) shouldWait() bool {
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for p := range ps.players {
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if p.canReadSourceToBuffer() {
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return false
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}
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}
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return true
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}
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func (ps *players) wait() {
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ps.cond.L.Lock()
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defer ps.cond.L.Unlock()
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for ps.shouldWait() {
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ps.cond.Wait()
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}
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}
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func (ps *players) loop() {
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var players []*playerImpl
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for {
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ps.wait()
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ps.cond.L.Lock()
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players = players[:0]
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for p := range ps.players {
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players = append(players, p)
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}
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ps.cond.L.Unlock()
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for _, p := range players {
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p.readSourceToBuffer()
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}
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}
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}
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func (ps *players) addPlayer(player *playerImpl) {
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ps.cond.L.Lock()
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defer ps.cond.L.Unlock()
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if ps.players == nil {
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ps.players = map[*playerImpl]struct{}{}
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}
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ps.players[player] = struct{}{}
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ps.cond.Signal()
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}
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func (ps *players) removePlayer(player *playerImpl) {
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ps.cond.L.Lock()
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defer ps.cond.L.Unlock()
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delete(ps.players, player)
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ps.cond.Signal()
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}
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func (ps *players) read(buf []float32) {
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ps.cond.L.Lock()
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players := make([]*playerImpl, 0, len(ps.players))
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for p := range ps.players {
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players = append(players, p)
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}
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ps.cond.L.Unlock()
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for i := range buf {
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buf[i] = 0
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}
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for _, p := range players {
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p.readBufferAndAdd(buf)
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}
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ps.cond.Signal()
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}
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type Player struct {
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p *playerImpl
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}
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type playerImpl struct {
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context *Context
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src io.Reader
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volume float64
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err error
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state playerState
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tmpbuf []byte
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buf []byte
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eof bool
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bufferSize int
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m sync.Mutex
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}
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func newPlayer(context *Context, src io.Reader) *Player {
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p := &Player{
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p: &playerImpl{
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context: context,
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src: src,
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volume: 1,
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bufferSize: context.defaultBufferSize(),
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},
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}
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runtime.SetFinalizer(p, (*Player).Close)
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return p
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}
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func (p *Player) Err() error {
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return p.p.Err()
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}
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func (p *playerImpl) Err() error {
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p.m.Lock()
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defer p.m.Unlock()
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return p.err
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}
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func (p *Player) Play() {
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p.p.Play()
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}
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func (p *playerImpl) Play() {
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ch := make(chan struct{})
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go func() {
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p.m.Lock()
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defer p.m.Unlock()
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close(ch)
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p.playImpl()
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}()
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<-ch
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}
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func (p *Player) SetBufferSize(bufferSize int) {
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p.p.setBufferSize(bufferSize)
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}
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func (p *playerImpl) setBufferSize(bufferSize int) {
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p.m.Lock()
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defer p.m.Unlock()
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orig := p.bufferSize
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p.bufferSize = bufferSize
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if bufferSize == 0 {
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p.bufferSize = p.context.defaultBufferSize()
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}
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if orig != p.bufferSize {
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p.tmpbuf = nil
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}
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}
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func (p *playerImpl) ensureTmpBuf() []byte {
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if p.tmpbuf == nil {
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p.tmpbuf = make([]byte, p.bufferSize)
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}
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return p.tmpbuf
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}
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func (p *playerImpl) playImpl() {
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if p.err != nil {
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return
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}
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if p.state != playerPaused {
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return
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}
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if !p.eof {
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buf := p.ensureTmpBuf()
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for len(p.buf) < p.bufferSize {
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n, err := p.src.Read(buf)
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if err != nil && err != io.EOF {
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p.setErrorImpl(err)
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return
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}
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p.buf = append(p.buf, buf[:n]...)
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if err == io.EOF {
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p.eof = true
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break
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}
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}
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}
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if !p.eof || len(p.buf) > 0 {
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p.state = playerPlay
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}
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p.m.Unlock()
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p.context.players.addPlayer(p)
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p.m.Lock()
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}
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func (p *Player) Pause() {
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p.p.Pause()
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}
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func (p *playerImpl) Pause() {
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p.m.Lock()
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defer p.m.Unlock()
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if p.state != playerPlay {
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return
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}
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p.state = playerPaused
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}
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func (p *Player) Seek(offset int64, whence int) (int64, error) {
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return p.p.Seek(offset, whence)
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}
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func (p *playerImpl) Seek(offset int64, whence int) (int64, error) {
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p.m.Lock()
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defer p.m.Unlock()
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// If a player is playing, keep playing even after this seeking.
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if p.state == playerPlay {
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defer p.playImpl()
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}
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// Reset the internal buffer.
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p.resetImpl()
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// Check if the source implements io.Seeker.
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s, ok := p.src.(io.Seeker)
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if !ok {
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return 0, errors.New("cbackend: the source must implement io.Seeker")
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}
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return s.Seek(offset, whence)
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}
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func (p *playerImpl) resetImpl() {
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if p.state == playerClosed {
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return
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}
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p.state = playerPaused
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p.buf = p.buf[:0]
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p.eof = false
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}
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func (p *Player) IsPlaying() bool {
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return p.p.IsPlaying()
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}
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func (p *playerImpl) IsPlaying() bool {
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p.m.Lock()
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defer p.m.Unlock()
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return p.state == playerPlay
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}
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func (p *Player) Volume() float64 {
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return p.p.Volume()
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}
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func (p *playerImpl) Volume() float64 {
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p.m.Lock()
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defer p.m.Unlock()
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return p.volume
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}
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func (p *Player) SetVolume(volume float64) {
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p.p.SetVolume(volume)
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}
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func (p *playerImpl) SetVolume(volume float64) {
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p.m.Lock()
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defer p.m.Unlock()
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p.volume = volume
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}
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func (p *Player) UnplayedBufferSize() int {
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return p.p.UnplayedBufferSize()
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}
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func (p *playerImpl) UnplayedBufferSize() int {
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p.m.Lock()
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defer p.m.Unlock()
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return len(p.buf)
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}
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func (p *Player) Close() error {
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runtime.SetFinalizer(p, nil)
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return p.p.Close()
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}
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func (p *playerImpl) Close() error {
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p.m.Lock()
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defer p.m.Unlock()
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return p.closeImpl()
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}
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func (p *playerImpl) closeImpl() error {
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p.m.Unlock()
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p.context.players.removePlayer(p)
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p.m.Lock()
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if p.state == playerClosed {
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return p.err
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}
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p.state = playerClosed
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p.buf = nil
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return p.err
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}
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func (p *playerImpl) readBufferAndAdd(buf []float32) int {
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p.m.Lock()
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defer p.m.Unlock()
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if p.state != playerPlay {
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return 0
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}
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bitDepthInBytes := p.context.bitDepthInBytes
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n := len(p.buf) / bitDepthInBytes
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if n > len(buf) {
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n = len(buf)
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}
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volume := float32(p.volume)
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src := p.buf[:n*bitDepthInBytes]
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for i := 0; i < n; i++ {
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var v float32
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switch bitDepthInBytes {
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case 1:
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v8 := src[i]
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v = float32(v8-(1<<7)) / (1 << 7)
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case 2:
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v16 := int16(src[2*i]) | (int16(src[2*i+1]) << 8)
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v = float32(v16) / (1 << 15)
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}
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buf[i] += v * volume
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}
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copy(p.buf, p.buf[n*bitDepthInBytes:])
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p.buf = p.buf[:len(p.buf)-n*bitDepthInBytes]
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if p.eof && len(p.buf) == 0 {
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p.state = playerPaused
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}
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return n
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}
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|
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func (p *playerImpl) canReadSourceToBuffer() bool {
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p.m.Lock()
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defer p.m.Unlock()
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|
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if p.eof {
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return false
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}
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return len(p.buf) < p.bufferSize
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}
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|
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func (p *playerImpl) readSourceToBuffer() {
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p.m.Lock()
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defer p.m.Unlock()
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|
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if p.err != nil {
|
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return
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}
|
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if p.state == playerClosed {
|
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return
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}
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|
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if len(p.buf) >= p.bufferSize {
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return
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}
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buf := p.ensureTmpBuf()
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n, err := p.src.Read(buf)
|
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|
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if err != nil && err != io.EOF {
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p.setErrorImpl(err)
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return
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}
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p.buf = append(p.buf, buf[:n]...)
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if err == io.EOF {
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p.eof = true
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if len(p.buf) == 0 {
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p.state = playerPaused
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}
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}
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}
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func (p *playerImpl) setErrorImpl(err error) {
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p.err = err
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p.closeImpl()
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}
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2
go.mod
2
go.mod
@ -8,7 +8,7 @@ require (
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github.com/hajimehoshi/bitmapfont/v2 v2.2.1
|
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github.com/hajimehoshi/file2byteslice v0.0.0-20210813153925-5340248a8f41
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github.com/hajimehoshi/go-mp3 v0.3.3
|
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github.com/hajimehoshi/oto/v2 v2.3.0-alpha.6.0.20220802151442-4f655ffe7bb4
|
||||
github.com/hajimehoshi/oto/v2 v2.3.0-alpha.6.0.20220808142854-0d70fdd8205d
|
||||
github.com/jakecoffman/cp v1.2.1
|
||||
github.com/jezek/xgb v1.0.1
|
||||
github.com/jfreymuth/oggvorbis v1.0.3
|
||||
|
||||
4
go.sum
4
go.sum
@ -11,8 +11,8 @@ github.com/hajimehoshi/go-mp3 v0.3.3 h1:cWnfRdpye2m9ElSoVqneYRcpt/l3ijttgjMeQh+r
|
||||
github.com/hajimehoshi/go-mp3 v0.3.3/go.mod h1:qMJj/CSDxx6CGHiZeCgbiq2DSUkbK0UbtXShQcnfyMM=
|
||||
github.com/hajimehoshi/oto v0.6.1 h1:7cJz/zRQV4aJvMSSRqzN2TImoVVMpE0BCY4nrNJaDOM=
|
||||
github.com/hajimehoshi/oto v0.6.1/go.mod h1:0QXGEkbuJRohbJaxr7ZQSxnju7hEhseiPx2hrh6raOI=
|
||||
github.com/hajimehoshi/oto/v2 v2.3.0-alpha.6.0.20220802151442-4f655ffe7bb4 h1:tykbQMVvjFgSvX5ndg05alWI0mfD7rm/DtysW9Z757U=
|
||||
github.com/hajimehoshi/oto/v2 v2.3.0-alpha.6.0.20220802151442-4f655ffe7bb4/go.mod h1:ZH5KyijkM53TgspdS9sArUe7vv9EP7x4aNYJAmfGhvE=
|
||||
github.com/hajimehoshi/oto/v2 v2.3.0-alpha.6.0.20220808142854-0d70fdd8205d h1:T64feTPB+qGhPnLRsyzlYNiz+jTd/pcPCqB8/VTgooY=
|
||||
github.com/hajimehoshi/oto/v2 v2.3.0-alpha.6.0.20220808142854-0d70fdd8205d/go.mod h1:ZH5KyijkM53TgspdS9sArUe7vv9EP7x4aNYJAmfGhvE=
|
||||
github.com/jakecoffman/cp v1.2.1 h1:zkhc2Gpo9l4NLUZfeG3j33+3bQD7MkqPa+n5PdX+5mI=
|
||||
github.com/jakecoffman/cp v1.2.1/go.mod h1:JjY/Fp6d8E1CHnu74gWNnU0+b9VzEdUVPoJxg2PsTQg=
|
||||
github.com/jezek/xgb v1.0.1 h1:YUGhxps0aR7J2Xplbs23OHnV1mWaxFVcOl9b+1RQkt8=
|
||||
|
||||
Loading…
Reference in New Issue
Block a user