示例#1
0
// Retrieve all available sinks from PulseAudio
//
func (self *Client) GetSinks() ([]Sink, error) {
	operation := NewOperation(self)
	sinks := make([]Sink, 0)

	operation.paOper = C.pa_context_get_sink_info_list(C.pulse_get_context(), (C.pa_sink_info_cb_t)(unsafe.Pointer(C.pulse_get_sink_info_list_callback)), unsafe.Pointer(operation))

	//  wait for the operation to finish and handle success and error cases
	return sinks, operation.WaitSuccess(func(op *Operation) error {
		//  create a Sink{} for each returned payload
		for _, payload := range op.Payloads {
			sink := Sink{
				Client: self,
			}

			if err := sink.Initialize(payload.Properties); err == nil {
				sinks = append(sinks, sink)
			} else {
				return err
			}
		}

		return nil

	})
}
示例#2
0
// Set the volume of all channels of this sink to a factor of the maximum
// volume (0.0 <= v <= 1.0).  Factors greater than 1.0 will be accepted, but
// clipping or distortion may occur beyond that value.
//
func (self *Sink) SetVolume(factor float64) error {
	if self.Channels > 0 {
		operation := NewOperation(self.Client)
		newVolume := &C.pa_cvolume{}

		//  new volume is the (maximum number of normal volume steps * factor)
		newVolume = C.pa_cvolume_init(newVolume)
		newVolumeT := C.pa_volume_t(C.uint32_t(uint(float64(self.NumVolumeSteps) * factor)))

		//  prepare newVolume for its journey into PulseAudio
		C.pa_cvolume_set(newVolume, C.uint(self.Channels), newVolumeT)

		//  make the call
		operation.paOper = C.pa_context_set_sink_volume_by_index(C.pulse_get_context(), C.uint32_t(self.Index), newVolume, (C.pa_context_success_cb_t)(unsafe.Pointer(C.pulse_generic_success_callback)), unsafe.Pointer(operation))

		//  wait for the result, refresh, return any errors
		return operation.WaitSuccess(func(op *Operation) error {
			return self.Refresh()
		})
	} else {
		return fmt.Errorf("Cannot set volume on sink %d, no channels defined", self.Index)
	}

	return nil
}
示例#3
0
//  Explicitly set the muted or unmuted state of the sink.
//
func (self *Sink) SetMute(mute bool) error {
	operation := NewOperation(self.Client)

	var muting C.int

	if mute {
		muting = C.int(1)
	} else {
		muting = C.int(0)
	}

	operation.paOper = C.pa_context_set_sink_mute_by_index(C.pulse_get_context(), C.uint32_t(self.Index), muting, (C.pa_context_success_cb_t)(unsafe.Pointer(C.pulse_generic_success_callback)), unsafe.Pointer(operation))

	//  wait for the result, refresh, return any errors
	return operation.WaitSuccess(func(op *Operation) error {
		return self.Refresh()
	})
}
示例#4
0
// Synchronize this sink's data with the PulseAudio daemon.
//
func (self *Sink) Refresh() error {
	operation := NewOperation(self.Client)

	operation.paOper = C.pa_context_get_sink_info_by_index(C.pulse_get_context(), C.uint32_t(self.Index), (C.pa_sink_info_cb_t)(unsafe.Pointer(C.pulse_get_sink_info_by_index_callback)), unsafe.Pointer(operation))

	//  wait for the operation to finish and handle success and error cases
	return operation.WaitSuccess(func(op *Operation) error {
		if l := len(op.Payloads); l == 1 {
			payload := operation.Payloads[0]

			if err := self.Initialize(payload.Properties); err != nil {
				return err
			}
		} else {
			return fmt.Errorf("Invalid sink response: expected 1 payload, got %d", l)
		}

		return nil

	})
}
示例#5
0
// Retrieve information about the connected PulseAudio daemon
//
func (self *Client) GetServerInfo() (ServerInfo, error) {
	operation := NewOperation(self)
	info := ServerInfo{}

	operation.paOper = C.pa_context_get_server_info(C.pulse_get_context(), (C.pa_server_info_cb_t)(unsafe.Pointer(C.pulse_get_server_info_callback)), unsafe.Pointer(operation))

	//  wait for the operation to finish and handle success and error cases
	return info, operation.WaitSuccess(func(op *Operation) error {
		if len(op.Payloads) > 0 {
			payload := op.Payloads[0]

			if err := UnmarshalMap(payload.Properties, &info); err != nil {
				return err
			}
		} else {
			return fmt.Errorf("GetServerInfo() completed without retrieving any data")
		}

		return nil

	})
}