// Gen generates a buffer using a routine.
// A runtime panic will occur if routine is not one of the
// BufferRoutine constants.
func (self *Buffer) Gen(routine string, flags int, args ...float32) error {
if err := checkBufferRoutine(routine); err != nil {
return err
}
if err := checkBufferGenFlags(flags); err != nil {
return err
}
pat := bufferGenAddress
gen, err := osc.NewMessage(pat)
if err != nil {
return err
}
if err := gen.WriteInt32(self.Num); err != nil {
return err
}
if err := gen.WriteString(routine); err != nil {
return err
}
if err := gen.WriteInt32(int32(flags)); err != nil {
return err
}
for _, arg := range args {
if err := gen.WriteFloat32(arg); err != nil {
return err
}
}
if err := self.client.oscConn.Send(gen); err != nil {
return err
}
var done *osc.Message
select {
case done = <-self.client.doneChan:
case err = <-self.client.oscErrChan:
return err
}
if done.CountArguments() != 2 {
return errors.New("expected two arguments to /done message")
}
_, err = done.ReadString()
if err != nil {
return err
}
bufnum, err := done.ReadInt32()
if err != nil {
return err
}
// TODO:
// Don't error if we get a done message for a different buffer.
// We should probably requeue this particular done message on doneChan.
if bufnum != self.Num {
m := "expected done message for buffer %d, but got one for buffer %d"
return fmt.Errorf(m, self.Num, bufnum)
}
return nil
}
// AllocBuffer allocates a buffer on the server
func (self *Client) AllocBuffer(frames, channels int) (*Buffer, error) {
buf := newBuffer(self)
pat := bufferAllocAddress
alloc, err := osc.NewMessage(pat)
if err != nil {
return nil, err
}
if err := alloc.WriteInt32(buf.Num); err != nil {
return nil, err
}
if err := alloc.WriteInt32(int32(frames)); err != nil {
return nil, err
}
if err := alloc.WriteInt32(int32(channels)); err != nil {
return nil, err
}
if err := self.oscConn.Send(alloc); err != nil {
return nil, err
}
var done *osc.Message
select {
case done = <-self.doneChan:
break
case err = <-self.oscErrChan:
return nil, err
}
// error if this message was not an ack of the synthdef
if done.CountArguments() != 2 {
return nil, fmt.Errorf("expected two arguments to /done message")
}
addr, err := done.ReadString()
if err != nil {
return nil, err
}
if addr != pat {
return nil, fmt.Errorf("expected first argument to be %s but got %s", pat, addr)
}
bufnum, err := done.ReadInt32()
if err != nil {
return nil, err
}
// TODO:
// Don't error if we get a done message for a different buffer.
// We should probably requeue this particular done message on doneChan.
if bufnum != buf.Num {
m := "expected done message for buffer %d, but got one for buffer %d"
return nil, fmt.Errorf(m, buf.Num, bufnum)
}
return buf, nil
}
// ReadBuffer tells the server to read an audio file and
// load it into a buffer
func (self *Client) ReadBuffer(path string, num int32) (*Buffer, error) {
allocRead, err := osc.NewMessage(bufferReadAddress)
if err != nil {
return nil, err
}
buf := newReadBuffer(path, num, self)
if err := allocRead.WriteInt32(buf.Num); err != nil {
return nil, err
}
if err := allocRead.WriteString(path); err != nil {
return nil, err
}
if err := self.oscConn.Send(allocRead); err != nil {
return nil, err
}
var done *osc.Message
select {
case done = <-self.doneChan:
case err = <-self.oscErrChan:
return nil, err
}
// error if this message was not an ack of the buffer read
if done.CountArguments() != 2 {
return nil, fmt.Errorf("expected two arguments to /done message")
}
addr, err := done.ReadString()
if err != nil {
return nil, err
}
if addr != bufferReadAddress {
return nil, fmt.Errorf("expected first argument to be %s but got %s", bufferReadAddress, addr)
}
bufnum, err := done.ReadInt32()
if err != nil {
return nil, err
}
// TODO:
// Don't error if we get a done message for a different buffer.
// We should probably requeue this particular done message on doneChan.
if bufnum != buf.Num {
m := "expected done message for buffer %d, but got one for buffer %d"
return nil, fmt.Errorf(m, buf.Num, bufnum)
}
return buf, nil
}
// SendDef sends a synthdef to scsynth.
// This method blocks until a /done message is received
// indicating that the synthdef was loaded
func (self *Client) SendDef(def *Synthdef) error {
msg, err := osc.NewMessage(synthdefReceiveAddress)
if err != nil {
return err
}
db, err := def.Bytes()
if err != nil {
return err
}
if err := msg.WriteBlob(db); err != nil {
return err
}
if err := self.oscConn.Send(msg); err != nil {
return err
}
var done *osc.Message
select {
case done = <-self.doneChan:
goto ParseMessage
case err = <-self.oscErrChan:
return err
}
ParseMessage:
// error if this message was not an ack of the synthdef
errmsg := "expected /done with /d_recv argument"
if done.CountArguments() != 1 {
return fmt.Errorf(errmsg)
}
addr, err := done.ReadString()
if err != nil {
return err
}
if addr != synthdefReceiveAddress {
return errors.New(errmsg)
}
return nil
}
