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loopback_audio_posix.go
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loopback_audio_posix.go
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//go:build darwin || linux || freebsd
package main
import (
"fmt"
"github.com/taskcluster/taskcluster/v64/internal/scopes"
)
type LoopbackAudioFeature struct {
}
func (feature *LoopbackAudioFeature) Name() string {
return "LoopbackAudio"
}
func (feature *LoopbackAudioFeature) Initialise() error {
return nil
}
func (feature *LoopbackAudioFeature) PersistState() error {
return nil
}
func (feature *LoopbackAudioFeature) IsEnabled(task *TaskRun) bool {
return task.Payload.Features.LoopbackAudio
}
func (feature *LoopbackAudioFeature) NewTaskFeature(task *TaskRun) TaskFeature {
return &LoopbackAudioTask{
task: task,
devicePaths: []string{
fmt.Sprintf("/dev/snd/controlC%d", config.LoopbackAudioDeviceNumber),
fmt.Sprintf("/dev/snd/pcmC%dD0c", config.LoopbackAudioDeviceNumber),
fmt.Sprintf("/dev/snd/pcmC%dD0p", config.LoopbackAudioDeviceNumber),
fmt.Sprintf("/dev/snd/pcmC%dD1c", config.LoopbackAudioDeviceNumber),
fmt.Sprintf("/dev/snd/pcmC%dD1p", config.LoopbackAudioDeviceNumber),
},
}
}
type LoopbackAudioTask struct {
task *TaskRun
devicePaths []string
}
func (lat *LoopbackAudioTask) RequiredScopes() scopes.Required {
return scopes.Required{
{"generic-worker:loopback-audio:" + config.ProvisionerID + "/" + config.WorkerType},
{"generic-worker:loopback-audio"},
}
}
func (lat *LoopbackAudioTask) ReservedArtifacts() []string {
return []string{}
}
func (lat *LoopbackAudioTask) Start() *CommandExecutionError {
if config.LoopbackAudioDeviceNumber > 31 {
return executionError(internalError, errored, fmt.Errorf("loopback audio device number must be between 0 and 31, inclusive"))
}
return lat.setupAudioDevice()
}
func (lat *LoopbackAudioTask) Stop(err *ExecutionErrors) {
err.add(lat.resetAudioDevice())
}