msk
98 lines
2.2 KiB
C#
98 lines
2.2 KiB
C#
using Godot;
|
|
using Godot.Collections;
|
|
using System;
|
|
|
|
public partial class BGM : AudioStreamPlayer
|
|
{
|
|
// latency compensation
|
|
private ulong timeStartUsec;
|
|
private float timeDelay;
|
|
|
|
public float CurTime
|
|
{
|
|
get
|
|
{
|
|
float time = (Time.GetTicksUsec() - timeStartUsec) / 1000000f;
|
|
return time - timeDelay;
|
|
}
|
|
}
|
|
|
|
public void LoadFromUser(string path)
|
|
{
|
|
if (!path.StartsWith("user://"))
|
|
{
|
|
GD.PrintErr("Tried to load audio that isn't in user directory.");
|
|
return;
|
|
}
|
|
|
|
var f = FileAccess.Open(path, FileAccess.ModeFlags.Read);
|
|
if (f == null)
|
|
{
|
|
GD.PrintErr($"Unable to open {path} for loading audio! {FileAccess.GetOpenError()}");
|
|
return;
|
|
}
|
|
|
|
var ext = path.Split('.')[^1].ToLower();
|
|
switch (ext)
|
|
{
|
|
case "mp3":
|
|
GD.Print($"audio is MP3");
|
|
var mp3 = new AudioStreamMP3()
|
|
{
|
|
Data = f.GetBuffer((long)f.GetLength())
|
|
};
|
|
Stream = mp3;
|
|
break;
|
|
case "wav":
|
|
case "wave":
|
|
GD.Print("audio is WAV");
|
|
var buffer = f.GetBuffer((long)f.GetLength());
|
|
|
|
/// WAV HEADER PARSING ///
|
|
// bit format
|
|
var bf = new byte[]{ buffer[34], buffer[35] };
|
|
var bitFormat = BitConverter.ToUInt16(bf) switch
|
|
{
|
|
8 => AudioStreamWav.FormatEnum.Format8Bits,
|
|
16 => AudioStreamWav.FormatEnum.Format16Bits,
|
|
_ => AudioStreamWav.FormatEnum.ImaAdpcm
|
|
};
|
|
GD.Print($"Bit format: {bitFormat}");
|
|
|
|
// sample rate
|
|
var sr = new byte[] { buffer[24], buffer[25], buffer[26], buffer[27] };
|
|
var sampleRate = BitConverter.ToUInt32(sr);
|
|
GD.Print($"Sample rate: {sampleRate}");
|
|
|
|
// stereo or mono
|
|
var c = new byte[] { buffer[22], buffer[23] };
|
|
var channels = BitConverter.ToUInt16(c);
|
|
GD.Print($"Channels: {channels}");
|
|
|
|
var wav = new AudioStreamWav()
|
|
{
|
|
Data = buffer,
|
|
Format = bitFormat,
|
|
MixRate = (int)sampleRate,
|
|
Stereo = channels <= 1 ? false : true
|
|
};
|
|
Stream = wav;
|
|
break;
|
|
case "ogg":
|
|
// TODO: implement
|
|
GD.PrintErr("External OGGs not supported in Godot 4.1...");
|
|
break;
|
|
default:
|
|
GD.PrintErr("Unknown audio!");
|
|
break;
|
|
}
|
|
}
|
|
|
|
public void Play()
|
|
{
|
|
timeStartUsec = Time.GetTicksUsec();
|
|
timeDelay = (float) (AudioServer.GetTimeToNextMix() + AudioServer.GetOutputLatency());
|
|
base.Play();
|
|
}
|
|
}
|