//export jackClientCallback
func jackClientCallback(nframes C.jack_nframes_t, arg unsafe.Pointer) C.int {
jc := (*JackClient)(arg)
// Check for no callback set.
if jc.callback == nil {
return 0
}
var cArr *C.float
length := int(nframes)
for i, port := range jc.jackIn {
cArr = (*C.float)(C.jack_port_get_buffer(port, nframes))
cArrayToSlice32f(cArr, length, &jc.bufIn[i])
}
for i, port := range jc.jackOut {
cArr = (*C.float)(C.jack_port_get_buffer(port, nframes))
cArrayToSlice32f(cArr, length, &jc.bufOut[i])
}
if err := jc.callback(jc.bufIn, jc.bufOut); err != nil {
return 1
}
return 0
}
func (this *Port) GetBuffer(frameCount FrameCount) (unsafe.Pointer, error) {
var err error
buffer := C.jack_port_get_buffer(this.jackPort, C.jack_nframes_t(frameCount))
if buffer == nil {
err = errors.New("jack_port_get_buffer failed for port '" + this.GetName() + "'")
}
return buffer, err
}
func (port *Port) GetMidiEvents(nframes uint32) []*MidiData {
var event C.jack_midi_event_t
samples := C.jack_port_get_buffer(port.handler, C.jack_nframes_t(nframes))
nEvents := uint32(C.jack_midi_get_event_count(samples))
events := make([]*MidiData, nEvents, nEvents)
for i := range events {
C.jack_midi_event_get(&event, samples, C.uint32_t(i))
buffer := C.GoBytes(unsafe.Pointer(event.buffer), C.int(event.size))
events[i] = &MidiData{
Time: uint32(event.time),
Buffer: buffer,
}
}
return events
}
func (port *Port) GetBuffer(nframes uint32) []AudioSample {
samples := C.jack_port_get_buffer(port.handler, C.jack_nframes_t(nframes))
return (*[1 << 30]AudioSample)(samples)[:nframes:nframes]
}
func (port *Port) MidiClearBuffer(nframes uint32) MidiBuffer {
buffer := C.jack_port_get_buffer(port.handler, C.jack_nframes_t(nframes))
C.jack_midi_clear_buffer(buffer)
return MidiBuffer(buffer)
}