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[feature]<process>: support fast forward/backward (#14)
Signed-off-by: o98k-ok <hggend@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,211 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "time" | ||
| "unicode" | ||
|
|
||
| "github.com/faiface/beep" | ||
| "github.com/faiface/beep/effects" | ||
| "github.com/faiface/beep/speaker" | ||
| "github.com/faiface/beep/wav" | ||
| "github.com/gdamore/tcell" | ||
| ) | ||
|
|
||
| func drawTextLine(screen tcell.Screen, x, y int, s string, style tcell.Style) { | ||
| for _, r := range s { | ||
| screen.SetContent(x, y, r, nil, style) | ||
| x++ | ||
| } | ||
| } | ||
|
|
||
| type audioPanel struct { | ||
| sampleRate beep.SampleRate | ||
| streamer beep.StreamSeeker | ||
| ctrl *beep.Ctrl | ||
| resampler *beep.Resampler | ||
| volume *effects.Volume | ||
| } | ||
|
|
||
| func newAudioPanel(sampleRate beep.SampleRate, streamer beep.StreamSeeker) *audioPanel { | ||
| ctrl := &beep.Ctrl{Streamer: beep.Loop(-1, streamer)} | ||
| resampler := beep.ResampleRatio(4, 1, ctrl) | ||
| volume := &effects.Volume{Streamer: resampler, Base: 2} | ||
| return &audioPanel{sampleRate, streamer, ctrl, resampler, volume} | ||
| } | ||
|
|
||
| func (ap *audioPanel) play() { | ||
| speaker.Play(ap.volume) | ||
| } | ||
|
|
||
| func (ap *audioPanel) draw(screen tcell.Screen) { | ||
| mainStyle := tcell.StyleDefault. | ||
| Background(tcell.NewHexColor(0x473437)). | ||
| Foreground(tcell.NewHexColor(0xD7D8A2)) | ||
| statusStyle := mainStyle. | ||
| Foreground(tcell.NewHexColor(0xDDC074)). | ||
| Bold(true) | ||
|
|
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| screen.Fill(' ', mainStyle) | ||
|
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| drawTextLine(screen, 0, 0, "Welcome to the Speedy Player!", mainStyle) | ||
| drawTextLine(screen, 0, 1, "Press [ESC] to quit.", mainStyle) | ||
| drawTextLine(screen, 0, 2, "Press [SPACE] to pause/resume.", mainStyle) | ||
| drawTextLine(screen, 0, 3, "Use keys in (?/?) to turn the buttons.", mainStyle) | ||
|
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||
| speaker.Lock() | ||
| position := ap.sampleRate.D(ap.streamer.Position()) | ||
| length := ap.sampleRate.D(ap.streamer.Len()) | ||
| volume := ap.volume.Volume | ||
| speed := ap.resampler.Ratio() | ||
| speaker.Unlock() | ||
|
|
||
| positionStatus := fmt.Sprintf("%v / %v", position.Round(time.Second), length.Round(time.Second)) | ||
| volumeStatus := fmt.Sprintf("%.1f", volume) | ||
| speedStatus := fmt.Sprintf("%.3fx", speed) | ||
|
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| drawTextLine(screen, 0, 5, "Position (Q/W):", mainStyle) | ||
| drawTextLine(screen, 16, 5, positionStatus, statusStyle) | ||
|
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||
| drawTextLine(screen, 0, 6, "Volume (A/S):", mainStyle) | ||
| drawTextLine(screen, 16, 6, volumeStatus, statusStyle) | ||
|
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||
| drawTextLine(screen, 0, 7, "Speed (Z/X):", mainStyle) | ||
| drawTextLine(screen, 16, 7, speedStatus, statusStyle) | ||
| } | ||
|
|
||
| func (ap *audioPanel) handle(event tcell.Event) (changed, quit bool) { | ||
| switch event := event.(type) { | ||
| case *tcell.EventKey: | ||
| if event.Key() == tcell.KeyESC { | ||
| return false, true | ||
| } | ||
|
|
||
| if event.Key() != tcell.KeyRune { | ||
| return false, false | ||
| } | ||
|
|
||
| switch unicode.ToLower(event.Rune()) { | ||
| case ' ': | ||
| speaker.Lock() | ||
| ap.ctrl.Paused = !ap.ctrl.Paused | ||
| speaker.Unlock() | ||
| return false, false | ||
|
|
||
| case 'q', 'w': | ||
| speaker.Lock() | ||
| newPos := ap.streamer.Position() | ||
| if event.Rune() == 'q' { | ||
| newPos -= ap.sampleRate.N(time.Second) | ||
| } | ||
| if event.Rune() == 'w' { | ||
| newPos += ap.sampleRate.N(time.Second) | ||
| } | ||
| if newPos < 0 { | ||
| newPos = 0 | ||
| } | ||
| if newPos >= ap.streamer.Len() { | ||
| newPos = ap.streamer.Len() - 1 | ||
| } | ||
| if err := ap.streamer.Seek(newPos); err != nil { | ||
| report(err) | ||
| } | ||
| speaker.Unlock() | ||
| return true, false | ||
|
|
||
| case 'a': | ||
| speaker.Lock() | ||
| ap.volume.Volume -= 0.1 | ||
| speaker.Unlock() | ||
| return true, false | ||
|
|
||
| case 's': | ||
| speaker.Lock() | ||
| ap.volume.Volume += 0.1 | ||
| speaker.Unlock() | ||
| return true, false | ||
|
|
||
| case 'z': | ||
| speaker.Lock() | ||
| ap.resampler.SetRatio(ap.resampler.Ratio() * 15 / 16) | ||
| speaker.Unlock() | ||
| return true, false | ||
|
|
||
| case 'x': | ||
| speaker.Lock() | ||
| ap.resampler.SetRatio(ap.resampler.Ratio() * 16 / 15) | ||
| speaker.Unlock() | ||
| return true, false | ||
| } | ||
| } | ||
| return false, false | ||
| } | ||
|
|
||
| func main() { | ||
| if len(os.Args) != 2 { | ||
| fmt.Fprintf(os.Stderr, "Usage: %s song.mp3\n", os.Args[0]) | ||
| os.Exit(1) | ||
| } | ||
| f, err := os.Open(os.Args[1]) | ||
| if err != nil { | ||
| report(err) | ||
| } | ||
| streamer, format, err := wav.Decode(f) | ||
| if err != nil { | ||
| report(err) | ||
| } | ||
| defer streamer.Close() | ||
|
|
||
| speaker.Init(format.SampleRate, format.SampleRate.N(time.Second/30)) | ||
| screen, err := tcell.NewScreen() | ||
| if err != nil { | ||
| report(err) | ||
| } | ||
| err = screen.Init() | ||
| if err != nil { | ||
| report(err) | ||
| } | ||
| defer screen.Fini() | ||
|
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| ap := newAudioPanel(format.SampleRate, streamer) | ||
|
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| screen.Clear() | ||
| ap.draw(screen) | ||
| screen.Show() | ||
|
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| ap.play() | ||
|
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| seconds := time.Tick(time.Second) | ||
| events := make(chan tcell.Event) | ||
| go func() { | ||
| for { | ||
| events <- screen.PollEvent() | ||
| } | ||
| }() | ||
|
|
||
| loop: | ||
| for { | ||
| select { | ||
| case event := <-events: | ||
| changed, quit := ap.handle(event) | ||
| if quit { | ||
| break loop | ||
| } | ||
| if changed { | ||
| screen.Clear() | ||
| ap.draw(screen) | ||
| screen.Show() | ||
| } | ||
| case <-seconds: | ||
| screen.Clear() | ||
| ap.draw(screen) | ||
| screen.Show() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func report(err error) { | ||
| fmt.Fprintln(os.Stderr, err) | ||
| os.Exit(1) | ||
| } |
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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