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/*
ipmidi.c:
Copyright (C) 2012 Henri Manson
This file is part of Csound.
The Csound Library is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
Csound 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Csound; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
*/
/* Realtime MIDI using ipmidi library */
/* Haiku 'int32' etc definitions in net headers conflict with sysdep.h */
#define __HAIKU_CONFLICT
#include <sys/types.h>
#ifdef WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
#include <errno.h>
#include "csdl.h" /* IPMIDI.C */
#include "midiops.h"
#include "oload.h"
static int OpenMidiInDevice_(CSOUND *csound, void **userData, const char *dev)
{
static int sock;
int status;
struct sockaddr_in saddr;
struct ip_mreq mreq;
#ifdef WIN32
WSADATA wsaData;
if (WSAStartup (MAKEWORD(2, 2), &wsaData) != 0) {
fprintf(stderr, "%s", Str("WSAStartup failed!\n"));
return -1;
}
#endif
printf("OpenMidiInDevice_: %s\n", dev);
// set content of struct saddr and imreq to zero
memset(&saddr, 0, sizeof(struct sockaddr_in));
// open a UDP socket
sock = socket(PF_INET, SOCK_DGRAM, 0);
if ( sock < 0 ) {
perror(Str("Error creating socket"));
return -1;
}
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
saddr.sin_port = htons(21928);
status = bind(sock, (struct sockaddr *) &saddr, sizeof(struct sockaddr_in));
if ( status < 0 ) {
#ifdef WIN32
char *buff = strerror(errno);
printf("WSAGetLastError() = %d\n", WSAGetLastError());
#else
char buff[128];
ignore_value(strerror_r(errno, buff, 128));
#endif
csound->ErrorMsg(csound, Str("Error binding socket to interface: %s"),
buff);
//perror("Error binding socket to interface");
return -1;
}
mreq.imr_multiaddr.s_addr = inet_addr("225.0.0.37");
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
status = setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(const char *)&mreq, sizeof(mreq));
if ( status < 0 ) {
#ifdef WIN32
char *buff = strerror(errno);
csound->ErrorMsg(csound, "WSAGetLastError() = %d\n", WSAGetLastError());
return -1;
#else
char buff[128];
ignore_value(strerror_r(errno, buff, 128));
csound->ErrorMsg(csound, Str("Error adding membership to interface: %s"),
buff);
return NOTOK;
//perror("Error binding socket to interface");
#endif
}
*userData = (void*) &sock;
/* report success */
return 0;
}
static int ReadMidiData_(CSOUND *csound, void *userData,
unsigned char *mbuf, int nbytes)
{
IGN(csound);
int n;
int sock = *((int *) userData);
fd_set rset;
struct timeval timeout;
int rc;
n = 0;
FD_ZERO(&rset);
FD_SET(sock, &rset);
timeout.tv_sec = 0;
timeout.tv_usec = 0;
rc = select(sock + 1, &rset, NULL, NULL, &timeout);
if (rc > 0) {
#ifdef WIN32
n = recv(sock, mbuf, nbytes, 0);
#else
n = read(sock, mbuf, nbytes);
#endif
printf("ReadMidiData__ n = %d\n", n);
}
/* return the number of bytes read */
return n;
}
static int CloseMidiInDevice_(CSOUND *csound, void *userData)
{
IGN(csound);
int sock = *((int *) userData);
//printf("CloseMidiInDevice_\n");
close(sock);
#ifdef WIN32
WSACleanup();
#endif
return 0;
}
/* module interface functions */
PUBLIC int csoundModuleCreate(CSOUND *csound)
{
OPARMS oparms;
csound->GetOParms(csound, &oparms);
/* nothing to do, report success */
if (oparms.msglevel & 0x400)
csound->Message(csound, "%s",
Str("ipMIDI real time MIDI plugin for Csound\n"));
return 0;
}
PUBLIC int csoundModuleInit(CSOUND *csound)
{
char *drv;
OPARMS oparms;
csound->GetOParms(csound, &oparms);
drv = (char*) (csound->QueryGlobalVariable(csound, "_RTMIDI"));
if (drv == NULL)
return 0;
if (strcmp(drv, "ipmidi") != 0)
return 0;
if (oparms.msglevel & 0x400)
csound->Message(csound, "%s", Str("ipmidi: ipMIDI module enabled\n"));
csound->SetExternalMidiInOpenCallback(csound, OpenMidiInDevice_);
csound->SetExternalMidiReadCallback(csound, ReadMidiData_);
csound->SetExternalMidiInCloseCallback(csound, CloseMidiInDevice_);
return 0;
}
PUBLIC int csoundModuleInfo(void)
{
/* does not depend on MYFLT type */
return ((CS_APIVERSION << 16) + (CS_APISUBVER << 8));
}
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