使用麦克风录音¶

Godot支持Windows, macOS, Linux, Android和iOS的游戏内音频录制.

一定要查看Viewport演示！可以下载演示档案中的Viewport文件夹, 或: https://github.com/godotengine/godot-demo-projects/tree/master/audio/mic_record.

你需要在项目设置中启用音频输入，否则只能获得空的音频文件。

根节点的结构¶

该演示由单一场景组成, 这个场景包括两个主要部分:GUI和音频.

我们将重点介绍音频部分. 在本演示中, 创建了一个名为 Record 的总线, 效果为 Record, 用于处理音频录制. 用一个名为 AudioStreamPlayer 的 AudioStreamRecord 进行录音.

var effect
var recording


func _ready():
    # We get the index of the "Record" bus.
    var idx = AudioServer.get_bus_index("Record")
    # And use it to retrieve its first effect, which has been defined
    # as an "AudioEffectRecord" resource.
    effect = AudioServer.get_bus_effect(idx, 0)

private AudioEffectRecord _effect;
private AudioStreamSample _recording;

public override void _Ready()
{
    // We get the index of the "Record" bus.
    int idx = AudioServer.GetBusIndex("Record");
    // And use it to retrieve its first effect, which has been defined
    // as an "AudioEffectRecord" resource.
    _effect = (AudioEffectRecord)AudioServer.GetBusEffect(idx, 0);
}

音频录制由 AudioEffectRecord 资源处理, 它有三个方法: get_recording(), is_recording_active(), 以及 set_recording_active().

func _on_RecordButton_pressed():
    if effect.is_recording_active():
        recording = effect.get_recording()
        $PlayButton.disabled = false
        $SaveButton.disabled = false
        effect.set_recording_active(false)
        $RecordButton.text = "Record"
        $Status.text = ""
    else:
        $PlayButton.disabled = true
        $SaveButton.disabled = true
        effect.set_recording_active(true)
        $RecordButton.text = "Stop"
        $Status.text = "Recording..."

public void OnRecordButtonPressed()
{
    if (_effect.IsRecordingActive())
    {
        _recording = _effect.GetRecording();
        GetNode<Button>("PlayButton").Disabled = false;
        GetNode<Button>("SaveButton").Disabled = false;
        _effect.SetRecordingActive(false);
        GetNode<Button>("RecordButton").Text = "Record";
        GetNode<Label>("Status").Text = "";
    }
    else
    {
        GetNode<Button>("PlayButton").Disabled = true;
        GetNode<Button>("SaveButton").Disabled = true;
        _effect.SetRecordingActive(true);
        GetNode<Button>("RecordButton").Text = "Stop";
        GetNode<Label>("Status").Text = "Recording...";
    }
}

在演示开始时, 录音效果是未激活. 当用户按下 RecordButton 时, 用 set_recording_active(true) 启用该效果.

在下一次按下按钮时, 由于 effect.is_recording_active() 为 true, 可以通过调用 effect.get_recording() 将录制的流存储到 recording 变量中.

func _on_PlayButton_pressed():
    print(recording)
    print(recording.format)
    print(recording.mix_rate)
    print(recording.stereo)
    var data = recording.get_data()
    print(data.size())
    $AudioStreamPlayer.stream = recording
    $AudioStreamPlayer.play()

public void OnPlayButtonPressed()
{
    GD.Print(_recording);
    GD.Print(_recording.Format);
    GD.Print(_recording.MixRate);
    GD.Print(_recording.Stereo);
    byte[] data = _recording.Data;
    GD.Print(data.Length);
    var audioStreamPlayer = GetNode<AudioStreamPlayer>("AudioStreamPlayer");
    audioStreamPlayer.Stream = _recording;
    audioStreamPlayer.Play();
}

要回放录音, 你可以将录音指定为 AudioStreamPlayer 的流, 并调用 play().

func _on_SaveButton_pressed():
    var save_path = $SaveButton/Filename.text
    recording.save_to_wav(save_path)
    $Status.text = "Saved WAV file to: %s\n(%s)" % [save_path, ProjectSettings.globalize_path(save_path)]

public void OnSavebuttonPressed()
{
    string savePath = GetNode<LineEdit>("SaveButton/Filename").Text;
    _recording.SaveToWav(savePath);
    GetNode<Label>("Status").Text = string.Format("Saved WAV file to: {0}\n({1})", savePath, ProjectSettings.GlobalizePath(savePath));
}

要保存录音, 你需要调用 save_to_wav(), 并提供文件的路径. 在本演示中, 路径由用户通过 LineEdit 输入框定义.