// NewPlayer returns a new Player.
// It initializes the underlying audio devices and the related resources.
func NewPlayer(src io.ReadSeeker, format Format, sampleRate int64) (*Player, error) {
device.Lock()
defer device.Unlock()
if device.d == nil {
device.d = alc.Open("")
c := device.d.CreateContext(nil)
if !alc.MakeContextCurrent(c) {
return nil, fmt.Errorf("player: cannot initiate a new player")
}
}
s := al.GenSources(1)
if code := al.Error(); code != 0 {
return nil, fmt.Errorf("player: cannot generate an audio source [err=%x]", code)
}
bufs := al.GenBuffers(2)
if err := lastErr(); err != nil {
return nil, err
}
return &Player{
t: &track{format: format, src: src, rate: sampleRate},
source: s[0],
bufs: bufs,
}, nil
}
// lastErr returns the last error or nil if the last operation
// has been succesful.
func lastErr() error {
if code := al.Error(); code != 0 {
return fmt.Errorf("audio: openal failed with %x", code)
}
return nil
}