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Diffstat (limited to 'system/kernel/pdp_comm.c')
| -rw-r--r-- | system/kernel/pdp_comm.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/system/kernel/pdp_comm.c b/system/kernel/pdp_comm.c new file mode 100644 index 0000000..bcc0e3a --- /dev/null +++ b/system/kernel/pdp_comm.c @@ -0,0 +1,198 @@ +/* + * Pure Data Packet system implementation. + * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +/* this file contains misc communication (packet) methods for pd */ + + +#include "pdp.h" +#include "pdp_internals.h" +#include <stdio.h> + +/* all symbols are C style */ +#ifdef __cplusplus +extern "C" +{ +#endif + +t_symbol *_pdp_sym_pdp; +t_symbol *_pdp_sym_rro; +t_symbol *_pdp_sym_rrw; +t_symbol *_pdp_sym_prc; +t_symbol *_pdp_sym_dpd; +t_symbol *_pdp_sym_ins; +t_symbol *_pdp_sym_acc; + +t_symbol *pdp_sym_pdp() {return _pdp_sym_pdp;} +t_symbol *pdp_sym_rro() {return _pdp_sym_rro;} +t_symbol *pdp_sym_rrw() {return _pdp_sym_rrw;} +t_symbol *pdp_sym_prc() {return _pdp_sym_prc;} +t_symbol *pdp_sym_dpd() {return _pdp_sym_dpd;} +t_symbol *pdp_sym_ins() {return _pdp_sym_ins;} +t_symbol *pdp_sym_acc() {return _pdp_sym_acc;} + +/************** packet management and communication convenience functions ************/ + +/* send a packet to an outlet */ +void outlet_pdp(t_outlet *out, int packetid) +{ + t_atom atom[2]; + + SETFLOAT(atom+1, (float)packetid); + + SETSYMBOL(atom+0, pdp_sym_rro()); + outlet_anything(out, pdp_sym_pdp(), 2, atom); + + SETSYMBOL(atom+0, pdp_sym_rrw()); + outlet_anything(out, pdp_sym_pdp(), 2, atom); + + SETSYMBOL(atom+0, pdp_sym_prc()); + outlet_anything(out, pdp_sym_pdp(), 2, atom); + +} + +/* send an accumulation packet to an outlet */ +void outlet_dpd(t_outlet *out, int packetid) +{ + t_atom atom[2]; + + SETFLOAT(atom+1, (float)packetid); + + SETSYMBOL(atom+0, pdp_sym_ins()); + outlet_anything(out, pdp_sym_dpd(), 2, atom); + + SETSYMBOL(atom+0, pdp_sym_acc()); + outlet_anything(out, pdp_sym_dpd(), 2, atom); + +} + +/* unregister a packet and send it to an outlet */ +void + +pdp_packet_pass_if_valid(t_outlet *outlet, int *packet_ptr) +{ + t_pdp *header = pdp_packet_header(*packet_ptr); + //if (-1 != *packet){ + if (header){ + /* if packet is exclusively owned, mark as passing */ + if (1 == header->users) pdp_packet_mark_passing(packet_ptr); + + /* send */ + outlet_pdp(outlet, *packet_ptr); + + /* if the packet is still here (was passing and not registered, + or it was a shared copy): unregister it */ + if (-1 != *packet_ptr){ + pdp_packet_unmark_passing(*packet_ptr); + pdp_packet_mark_unused(*packet_ptr); + *packet_ptr = -1; + } + } +} + +void +pdp_packet_replace_if_valid(int *dpacket, int *spacket) +{ + if (-1 != *spacket){ + pdp_packet_mark_unused(*dpacket); + *dpacket = *spacket; + *spacket = -1; + } + +} + + +int +pdp_packet_copy_ro_or_drop(int *dpacket, int spacket) +{ + int drop = 0; + if (*dpacket == -1) *dpacket = pdp_packet_copy_ro(spacket); + else { + /* send a notification there is a dropped packet */ + pdp_control_notify_drop(spacket); + drop = 1; + } + return drop; +} + + +int +pdp_packet_copy_rw_or_drop(int *dpacket, int spacket) +{ + int drop = 0; + if (*dpacket == -1) *dpacket = pdp_packet_copy_rw(spacket); + else { + /* send a notification there is a dropped packet */ + pdp_control_notify_drop(spacket); + drop = 1; + } + return drop; +} + +int +pdp_packet_convert_ro_or_drop(int *dpacket, int spacket, t_pdp_symbol *template) +{ + int drop = 0; + + if (!template) return pdp_packet_copy_ro_or_drop(dpacket, spacket); + + if (*dpacket == -1) *dpacket = pdp_packet_convert_ro(spacket, template); + else { + /* send a notification there is a dropped packet */ + pdp_control_notify_drop(spacket); + drop = 1; + } + return drop; +} + + +int +pdp_packet_convert_rw_or_drop(int *dpacket, int spacket, t_pdp_symbol *template) +{ + int drop = 0; + + if (!template) return pdp_packet_copy_rw_or_drop(dpacket, spacket); + + if (*dpacket == -1) *dpacket = pdp_packet_convert_rw(spacket, template); + else { + /* send a notification there is a dropped packet */ + pdp_control_notify_drop(spacket); + drop = 1; + } + return drop; +} + + +void +pdp_sym_setup(void) +{ + _pdp_sym_pdp = gensym("pdp"); + _pdp_sym_rro = gensym("register_ro"); + _pdp_sym_rrw = gensym("register_rw"); + _pdp_sym_prc = gensym("process"); + _pdp_sym_dpd = gensym("dpd"); + _pdp_sym_ins = gensym("inspect"); + _pdp_sym_acc = gensym("accumulate"); +} + + + +#ifdef __cplusplus +} +#endif |