/
main.go
196 lines (165 loc) · 4.88 KB
/
main.go
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package main
import (
"fmt"
"log"
"os"
"strings"
"time"
"github.com/faiface/beep"
"github.com/faiface/beep/effects"
"github.com/faiface/beep/mp3"
"github.com/faiface/beep/speaker"
"github.com/fatih/color"
)
var yellow = color.New(color.FgYellow).SprintFunc()
var green = color.New(color.FgGreen).SprintFunc()
var blue = color.New(color.FgBlue).SprintFunc()
var red = color.New(color.FgRed).SprintFunc()
func main() {
me := &MusicEntry{
//Source: "/Users/wyb/Music/陈奕迅-孤勇者1.mp3",
//Source: "/Users/wyb/Music/网易云音乐/电台节目/袁少有为 - 往后余生(粤语版)-亮声open.mp3",
//Source: "/Users/wyb/Music/网易云音乐/电台节目/袁少有为 - 谁能明白我-亮声open.mp3",
//Source: "/Users/wyb/Music/网易云音乐/电台节目/袁少有为 - 心碎-易欣-亮声open.mp3",
//Source: "/Users/wyb/Music/网易云音乐/电台节目/袁少有为 - 暧昧-亮声open.mp3",
//Source: "/Users/wyb/Music/网易云音乐/电台节目/袁少有为 - 爱的故事上集-亮声open.mp3",
Source: "/Users/wyb/Music/网易云音乐/电台节目/袁少有为 - 一生所爱-亮声open.mp3",
}
me.Open()
me.Play()
}
type MusicEntry struct {
Id string //编号
Name string //歌名
Artist string //作者
Source string //位置
Type string //类型
Filestream *os.File // 文件流
}
func (m *MusicEntry) Open() {
var err error
m.Filestream, err = os.Open(m.Source)
if err != nil {
log.Fatal(err)
}
}
func (m *MusicEntry) Play() {
streamer, format, err := mp3.Decode(m.Filestream)
if err != nil {
log.Fatal(err)
}
defer streamer.Close()
separator := string(os.PathSeparator)
path := strings.Split(m.Filestream.Name(), separator)
name := path[len(path)-1]
size := fmt.Sprintf("%dMB", streamer.Len()/1024/1024)
timeAll := streamer.Len() / int(format.SampleRate)
timeMinute := timeAll / 60
timeSecond := timeAll % 60
timeString := fmt.Sprintf("%dm%ds", timeMinute, timeSecond)
fmt.Println(green(name), yellow(timeString), blue(size))
//play1(format, streamer)
//play2(format, streamer)
play3(format, streamer)
//play4(format, streamer)
//play5(format, streamer)
}
func play1(format beep.Format, streamer beep.StreamSeekCloser) {
sampleRate := format.SampleRate
bufferSize := format.SampleRate.N(time.Second / 10)
if err := speaker.Init(sampleRate, bufferSize); err != nil {
log.Fatal(err)
}
speaker.Play(streamer)
select {}
}
func play2(format beep.Format, streamer beep.StreamSeekCloser) {
sampleRate := format.SampleRate * 2
resampled := beep.Resample(4, format.SampleRate, sampleRate, streamer)
if err := speaker.Init(sampleRate, sampleRate.N(time.Second/10)); err != nil {
log.Fatal(err)
}
done := make(chan struct{})
speaker.Play(beep.Seq(resampled, beep.Callback(func() {
close(done)
})))
//<-done
for {
select {
case <-done:
return
case <-time.After(time.Second):
speaker.Lock()
s := format.SampleRate.D(streamer.Position()).Round(time.Second)
fmt.Printf("%v ", red(s))
speaker.Unlock()
}
}
}
func play3(format beep.Format, streamer beep.StreamSeekCloser) {
sampleRate := format.SampleRate
bufferSize := format.SampleRate.N(time.Second / 10)
if err := speaker.Init(sampleRate, bufferSize); err != nil {
log.Fatal(err)
}
//loop := beep.Loop(3, streamer) //重复3次
//fast := beep.ResampleRatio(4, 5, loop) //快进5、6秒
buffer := beep.NewBuffer(format)
buffer.Append(streamer)
streamer.Close()
fast := buffer.Streamer(0, buffer.Len())
done := make(chan struct{})
speaker.Play(beep.Seq(fast, beep.Callback(func() {
close(done)
})))
for {
select {
case <-done:
return
case <-time.After(time.Second):
speaker.Lock()
s := format.SampleRate.D(fast.Position()).Round(time.Second)
fmt.Printf("%v ", red(s))
speaker.Unlock()
}
}
}
func play4(format beep.Format, streamer beep.StreamSeekCloser) {
sampleRate := format.SampleRate
bufferSize := format.SampleRate.N(time.Second / 10)
if err := speaker.Init(sampleRate, bufferSize); err != nil {
log.Fatal(err)
}
ctrl := &beep.Ctrl{Streamer: beep.Loop(-1, streamer), Paused: false}
volume := &effects.Volume{
Streamer: ctrl,
Base: 2,
Volume: 0,
Silent: false,
}
speedy := beep.ResampleRatio(4, 1, volume)
speaker.Play(speedy)
for {
fmt.Print("Press [ENTER] to pause/resume. ")
fmt.Scanln()
speaker.Lock()
ctrl.Paused = !ctrl.Paused
volume.Volume += 0.5 //增加音量
speedy.SetRatio(speedy.Ratio() + 0.1) //快进、慢放
speaker.Unlock()
}
}
func play5(format beep.Format, streamer beep.StreamSeekCloser) {
if err := speaker.Init(format.SampleRate, format.SampleRate.N(time.Second/60)); err != nil {
log.Fatal(err)
}
buffer := beep.NewBuffer(format)
buffer.Append(streamer)
streamer.Close()
for {
fmt.Print("Press [ENTER] to fire a gunshot! ")
fmt.Scanln()
shot := buffer.Streamer(0, buffer.Len())
speaker.Play(shot)
}
}