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Add multiple audio channels (WIP)

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This commit is contained in:
Alessandro Proto 2023-02-16 20:14:39 +01:00
parent 9907232af7
commit 32d5299a3f
2 changed files with 157 additions and 33 deletions
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77
Capy64/Core/Audio.cs
View file

@ -30,24 +30,78 @@ public class Audio : IDisposable
}
public const int SampleRate = 48000;
public const AudioChannels Channels = AudioChannels.Mono;
public readonly DynamicSoundEffectInstance Sound;
public const AudioChannels AudioChannel = AudioChannels.Mono;
public const int ChannelsCount = 5;
public readonly DynamicSoundEffectInstance[] Channels = new DynamicSoundEffectInstance[ChannelsCount];
private bool[] freeChannels = new bool[ChannelsCount];
private static readonly Random rng = new();
public Audio()
{
Sound = new DynamicSoundEffectInstance(SampleRate, Channels);
for (int i = 0; i < ChannelsCount; i++)
{
Channels[i] = new DynamicSoundEffectInstance(SampleRate, AudioChannel);
freeChannels[i] = true;
Channels[i].BufferNeeded += Audio_BufferNeeded;
}
}
public TimeSpan Submit(byte[] buffer)
private void Audio_BufferNeeded(object sender, EventArgs e)
{
Sound.SubmitBuffer(buffer);
return Sound.GetSampleDuration(buffer.Length);
for (int i = 0; i < ChannelsCount; i++)
{
if (Channels[i] == sender)
{
freeChannels[i] = true;
}
}
}
public byte[] GenerateWave(Waveform form, double frequency, TimeSpan time, float volume = 1f)
public int GetChannelId(int inp)
{
var size = Sound.GetSampleSizeInBytes(time);
if (inp >= 0)
return inp;
if (inp == -1)
{
for (int i = 0; i < ChannelsCount; i++)
{
if (freeChannels[i])
return i;
}
}
// -2 is all?
return -3;
}
public bool TryGetChannel(int id, out DynamicSoundEffectInstance channel, out int resolvedId)
{
resolvedId = GetChannelId(id);
if (resolvedId >= 0)
channel = Channels[resolvedId];
else
channel = null;
return channel != null;
}
public TimeSpan Submit(int id, byte[] buffer)
{
if (!TryGetChannel(id, out var channel, out var rId))
return TimeSpan.Zero;
channel.SubmitBuffer(buffer);
freeChannels[rId] = false;
return channel.GetSampleDuration(buffer.Length);
}
public byte[] GenerateWave(DynamicSoundEffectInstance channel, Waveform form, double frequency, TimeSpan time, float volume = 1f)
{
var size = channel.GetSampleSizeInBytes(time);
var buffer = new byte[size];
var step = 1d / SampleRate;
@ -63,7 +117,7 @@ public class Audio : IDisposable
Waveform.Noise => rng.NextDouble() * 2 - 1,
_ => throw new NotImplementedException(),
};
value = Math.Clamp(value, -1, 1);
var sample = (short)((value >= 0.0f ? value * short.MaxValue : value * short.MinValue * -1) * volume);
if (!BitConverter.IsLittleEndian)
@ -117,6 +171,9 @@ public class Audio : IDisposable
public void Dispose()
{
GC.SuppressFinalize(this);
Sound.Dispose();
for (int i = 0; i < ChannelsCount; i++)
{
Channels[i]?.Dispose();
}
}
}

113
Capy64/Runtime/Libraries/Audio.cs
View file

@ -90,7 +90,7 @@ public class Audio : IComponent
return 1;
}
private static async Task DelayEmit(TimeSpan time)
private static async Task DelayEmit(TimeSpan time, DynamicSoundEffectInstance channel)
{
var waitTime = time - TimeSpan.FromMilliseconds(1000 / 60);
if (waitTime.TotalMilliseconds < 0)
@ -98,7 +98,7 @@ public class Audio : IComponent
await Task.Delay(waitTime);
_game.LuaRuntime.QueueEvent("audio_end", LK =>
{
LK.PushInteger(_game.Audio.Sound.PendingBufferCount);
LK.PushInteger(channel.PendingBufferCount);
return 1;
});
}
@ -127,7 +127,16 @@ public class Audio : IComponent
}
}
if (_game.Audio.Sound.PendingBufferCount > queueLimit)
var id = (int)L.OptInteger(2, -1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushBoolean(false);
L.PushString("Channel not available");
return 2;
}
if (channel.PendingBufferCount > queueLimit)
{
L.PushBoolean(false);
L.PushString("queue is full");
@ -137,11 +146,11 @@ public class Audio : IComponent
try
{
var ts = _game.Audio.Submit(buffer);
DelayEmit(ts);
var ts = _game.Audio.Submit(rid, buffer);
DelayEmit(ts, channel);
if (_game.Audio.Sound.State != SoundState.Playing)
_game.Audio.Sound.Play();
if (channel.State != SoundState.Playing)
channel.Play();
}
catch (Exception ex)
{
@ -157,11 +166,11 @@ public class Audio : IComponent
var freq = L.OptNumber(1, 440);
var time = L.OptNumber(2, 1);
var timespan = TimeSpan.FromSeconds(time);
var volume = (float)L.OptNumber(3, 1);
volume = Math.Clamp(volume, 0, 1);
var timespan = TimeSpan.FromSeconds(time);
var form = L.CheckOption(4, "sine", new string[]
{
"sine",
@ -172,37 +181,71 @@ public class Audio : IComponent
null,
});
var buffer = _game.Audio.GenerateWave((Waveform)form, freq, timespan, volume);
var id = (int)L.OptInteger(5, -1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushBoolean(false);
return 1;
}
var buffer = _game.Audio.GenerateWave(channel, (Waveform)form, freq, timespan, volume);
try
{
var ts = _game.Audio.Submit(buffer);
DelayEmit(ts);
var ts = _game.Audio.Submit(rid, buffer);
DelayEmit(ts, channel);
if (_game.Audio.Sound.State != SoundState.Playing)
_game.Audio.Sound.Play();
if (channel.State != SoundState.Playing)
channel.Play();
L.PushBoolean(true);
}
catch (Exception ex)
{
L.Error(ex.Message);
}
return 0;
return 1;
}
private static int L_Resume(IntPtr state)
{
_game.Audio.Sound.Resume();
var L = Lua.FromIntPtr(state);
var id = (int)L.CheckInteger(1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushBoolean(false);
return 1;
}
channel.Resume();
return 0;
}
private static int L_Pause(IntPtr state)
{
_game.Audio.Sound.Pause();
var L = Lua.FromIntPtr(state);
var id = (int)L.CheckInteger(1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushBoolean(false);
return 1;
}
channel.Pause();
return 0;
}
private static int L_Stop(IntPtr state)
{
_game.Audio.Sound.Stop();
var L = Lua.FromIntPtr(state);
var id = (int)L.CheckInteger(1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushBoolean(false);
return 1;
}
channel.Stop();
return 0;
}
@ -211,7 +254,14 @@ public class Audio : IComponent
{
var L = Lua.FromIntPtr(state);
L.PushNumber(_game.Audio.Sound.Volume);
var id = (int)L.CheckInteger(1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushNil();
return 1;
}
L.PushNumber(channel.Volume);
return 1;
}
@ -219,10 +269,17 @@ public class Audio : IComponent
{
var L = Lua.FromIntPtr(state);
var volume = (float)L.CheckNumber(1);
var id = (int)L.CheckInteger(1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushNil();
return 1;
}
var volume = (float)L.CheckNumber(2);
volume = Math.Clamp(volume, 0, 1);
_game.Audio.Sound.Volume = volume;
channel.Volume = volume;
return 0;
}
@ -231,7 +288,14 @@ public class Audio : IComponent
{
var L = Lua.FromIntPtr(state);
var status = _game.Audio.Sound.State switch
var id = (int)L.CheckInteger(1);
if (!_game.Audio.TryGetChannel(id, out var channel, out var rid))
{
L.PushNil();
return 1;
}
var status = channel.State switch
{
SoundState.Playing => "playing",
SoundState.Paused => "paused",
@ -246,6 +310,9 @@ public class Audio : IComponent
private void OnClose(object sender, EventArgs e)
{
_game.Audio.Sound.Stop(true);
foreach (var channel in _game.Audio.Channels)
{
channel.Stop();
}
}
}