protected override void Render(Widget widget)
{
base.Render(widget);
Animator <AudioAction> actionAnimator;
if (!audio.Animators.TryFind("Action", out actionAnimator))
{
return;
}
foreach (var key in actionAnimator.ReadonlyKeys)
{
if (key.Value == AudioAction.Play)
{
var sample = GetSampleAtFrame(key.Frame);
Waveform waveform = null;
try {
waveform = GetWaveform(sample.Path);
} catch (System.Exception) {
continue;
}
var pos = new Vector2(key.Frame * TimelineMetrics.ColWidth + 1, 0);
var scale = Document.Current.Format == DocumentFormat.Scene ? 0.5f : 1;
foreach (var p in waveform.Parts)
{
var size = new Vector2(p.Width * scale * TimelineMetrics.ColWidth / pixelsPerFrame, widget.Height);
Renderer.DrawRect(pos, pos + size, ColorTheme.Current.TimelineGrid.WaveformBackground);
Renderer.DrawSprite(p.Texture, ColorTheme.Current.TimelineGrid.WaveformColor, pos, size, Vector2.Zero, Vector2.One);
pos.X += size.X;
}
}
}
}
static unsafe Waveform GetWaveform(string path)
{
Waveform waveform;
if (waveforms.TryGetValue(path, out waveform))
{
return(waveform);
}
waveform = new Waveform();
var textureWidth = 256;
var textureHeight = 64;
using (var fs = AssetBundle.Current.OpenFile(path + ".ogg")) {
using (var decoder = AudioDecoderFactory.CreateDecoder(fs)) {
var stereo = decoder.GetFormat() == AudioFormat.Stereo16;
while (true)
{
var maxPartLength = textureWidth / (AnimationUtils.FramesPerSecond * pixelsPerFrame);
var maxPartSamples = (int)(maxPartLength * decoder.GetFrequency());
var maxBlocks = maxPartSamples / decoder.GetBlockSize() * (stereo ? 4 : 2);
var samples = Marshal.AllocHGlobal(maxBlocks * decoder.GetBlockSize());
try {
var numBlocks = decoder.ReadBlocks(samples, 0, maxBlocks);
if (numBlocks == 0)
{
break;
}
var numSamples = numBlocks * decoder.GetBlockSize() / (stereo ? 4 : 2);
var pixels = new Color4[textureWidth * textureHeight];
int width = numSamples * textureWidth / maxPartSamples;
if (stereo)
{
BuildMonoWaveform((short *)samples, 2, numSamples, pixels, textureWidth, width, 0, textureHeight / 2 - 1);
BuildMonoWaveform(((short *)samples + 1), 2, numSamples, pixels, textureWidth, width, textureHeight / 2 + 1, textureHeight - 1);
}
else
{
BuildMonoWaveform((short *)samples, 1, numSamples, pixels, textureWidth, width, 0, textureHeight - 1);
}
var texture = new Texture2D();
texture.LoadImage(pixels, textureWidth, textureHeight);
waveform.Parts.Add(new Waveform.Part {
Texture = texture, Width = width
});
} finally {
Marshal.FreeHGlobal(samples);
}
}
}
}
waveforms.Add(path, waveform);
return(waveform);
}