mirror of https://github.com/miguelmota/cointop
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package beep
|
|
|
|
// Ctrl allows for pausing a Streamer.
|
|
//
|
|
// Wrap a Streamer in a Ctrl.
|
|
//
|
|
// ctrl := &beep.Ctrl{Streamer: s}
|
|
//
|
|
// Then, we can pause the streaming (this will cause Ctrl to stream silence).
|
|
//
|
|
// ctrl.Paused = true
|
|
//
|
|
// To completely stop a Ctrl before the wrapped Streamer is drained, just set the wrapped Streamer
|
|
// to nil.
|
|
//
|
|
// ctrl.Streamer = nil
|
|
//
|
|
// If you're playing a Streamer wrapped in a Ctrl through the speaker, you need to lock and unlock
|
|
// the speaker when modifying the Ctrl to avoid race conditions.
|
|
//
|
|
// speaker.Play(ctrl)
|
|
// // ...
|
|
// speaker.Lock()
|
|
// ctrl.Paused = true
|
|
// speaker.Unlock()
|
|
type Ctrl struct {
|
|
Streamer Streamer
|
|
Paused bool
|
|
}
|
|
|
|
// Stream streams the wrapped Streamer, if not nil. If the Streamer is nil, Ctrl acts as drained.
|
|
// When paused, Ctrl streams silence.
|
|
func (c *Ctrl) Stream(samples [][2]float64) (n int, ok bool) {
|
|
if c.Streamer == nil {
|
|
return 0, false
|
|
}
|
|
if c.Paused {
|
|
for i := range samples {
|
|
samples[i] = [2]float64{}
|
|
}
|
|
return len(samples), true
|
|
}
|
|
return c.Streamer.Stream(samples)
|
|
}
|
|
|
|
// Err returns the error of the wrapped Streamer, if not nil.
|
|
func (c *Ctrl) Err() error {
|
|
if c.Streamer == nil {
|
|
return nil
|
|
}
|
|
return c.Streamer.Err()
|
|
}
|