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This commit is contained in:
5684185+vsariola@users.noreply.github.com
2025-10-23 14:53:08 +03:00
parent 7f03664870
commit fa7901c7c6
9 changed files with 184 additions and 62 deletions
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23
tracker/player.go
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@ -5,7 +5,6 @@ import (
"fmt"
"math"
"slices"
"time"
"github.com/vsariola/sointu"
"github.com/vsariola/sointu/vm"
@ -42,7 +41,8 @@ type (
PlayerStatus struct {
SongPos sointu.SongPos // the current position in the score
VoiceLevels [vm.MAX_VOICES]float32 // a level that can be used to visualize the volume of each voice
CPULoad float64 // current CPU load of the player, used to adjust the render rate
NumCores int
CPULoad [vm.MAX_CORES]sointu.CPULoad // current CPU load of the player, used to adjust the render rate
}
// PlayerProcessContext is the context given to the player when processing
@ -97,9 +97,6 @@ func NewPlayer(broker *Broker, synther sointu.Synther) *Player {
// buffer. It is used to trigger and release notes during processing. The
// context is also used to get the current BPM from the host.
func (p *Player) Process(buffer sointu.AudioBuffer, context PlayerProcessContext) {
startTime := time.Now()
startFrame := p.frame
p.processMessages(context)
p.events.adjustTimes(p.frameDeltas, p.frame, p.frame+int64(len(buffer)))
@ -164,7 +161,10 @@ func (p *Player) Process(buffer sointu.AudioBuffer, context PlayerProcessContext
}
// when the buffer is full, return
if len(buffer) == 0 {
p.updateCPULoad(time.Since(startTime), p.frame-startFrame)
if p.synth != nil {
p.status.NumCores = p.synth.NumCores()
p.synth.CPULoad(p.status.CPULoad[:])
}
p.send(nil)
return
}
@ -448,14 +448,3 @@ func (p *Player) processNoteEvent(ev NoteEvent) {
p.synth.Trigger(oldestVoice, ev.Note)
TrySend(p.broker.ToModel, MsgToModel{TriggerChannel: instrIndex + 1})
}
func (p *Player) updateCPULoad(duration time.Duration, frames int64) {
if frames <= 0 {
return // no frames rendered, so cannot compute CPU load
}
realtime := float64(duration) / 1e9
songtime := float64(frames) / 44100
newload := realtime / songtime
alpha := math.Exp(-songtime) // smoothing factor, time constant of 1 second
p.status.CPULoad = float64(p.status.CPULoad)*alpha + newload*(1-alpha)
}