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feat(tracker): show CPU load percentage in the song panel

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This commit is contained in:
5684185+vsariola@users.noreply.github.com
2025-06-17 17:59:54 +03:00
parent 1a13fadd75
commit 340620ed49
5 changed files with 34 additions and 1 deletions
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20
tracker/player.go
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@ -5,6 +5,7 @@ import (
"fmt"
"math"
"slices"
"time"
"github.com/vsariola/sointu"
"github.com/vsariola/sointu/vm"
@ -32,6 +33,8 @@ type (
frameDeltas map[any]int64 // Player.frame (approx.)= event.Timestamp + frameDeltas[event.Source]
events NoteEventList
cpuload float64 // current CPU load of the player, used to adjust the render rate
synther sointu.Synther // the synther used to create new synths
broker *Broker // the broker used to communicate with different parts of the tracker
}
@ -86,6 +89,9 @@ 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)))
@ -145,6 +151,7 @@ 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)
p.send(nil)
return
}
@ -345,7 +352,7 @@ func (p *Player) compileOrUpdateSynth() {
// all sendTargets from player are always non-blocking, to ensure that the player thread cannot end up in a dead-lock
func (p *Player) send(message interface{}) {
TrySend(p.broker.ToModel, MsgToModel{HasPanicPosLevels: true, Panic: p.synth == nil, SongPosition: p.songPos, VoiceLevels: p.voiceLevels, Data: message})
TrySend(p.broker.ToModel, MsgToModel{HasPanicPosLevels: true, Panic: p.synth == nil, SongPosition: p.songPos, VoiceLevels: p.voiceLevels, CPULoad: p.cpuload, Data: message})
}
func (p *Player) processNoteEvent(ev NoteEvent) {
@ -405,3 +412,14 @@ 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.cpuload = float64(p.cpuload)*alpha + newload*(1-alpha)
}