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#include <string.h>
#include <signal.h>
#include <sys/select.h>
#include <unistd.h>
#include <errno.h>
#include "midimonster.h"
#include "config.h"
#include "backend.h"
//temporary prototypes
int artnet_init();
int midi_init();
int osc_init();
static size_t mappings = 0;
static channel_mapping* map = NULL;
static size_t fds = 0;
static managed_fd* fd = NULL;
volatile static sig_atomic_t shutdown_requested = 0;
void signal_handler(int signum){
shutdown_requested = 1;
}
int mm_map_channel(channel* from, channel* to){
size_t u, m;
//find existing source mapping
for(u = 0; u < mappings; u++){
if(map[u].from == from){
break;
}
}
//create new entry
if(u == mappings){
map = realloc(map, (mappings + 1) * sizeof(channel_mapping));
if(!map){
fprintf(stderr, "Failed to allocate memory\n");
return 1;
}
memset(map + mappings, 0, sizeof(channel_mapping));
mappings++;
}
//check whether the target is already mapped
for(m = 0; m < map[u].destinations; m++){
if(map[u].to[m] == to){
return 0;
}
}
map[u].to = realloc(map[u].to, (map[u].destinations + 1) * sizeof(channel*));
if(!map[u].to){
fprintf(stderr, "Failed to allocate memory\n");
map[u].destinations = 0;
return 1;
}
map[u].to[map[u].destinations] = to;
map[u].destinations++;
return 0;
}
void map_free(){
size_t u;
for(u = 0; u < mappings; u++){
free(map[u].to);
}
free(map);
mappings = 0;
map = NULL;
}
int mm_manage_fd(int new_fd, char* back, int manage, void* impl){
backend* b = backend_match(back);
size_t u;
if(!b){
fprintf(stderr, "Unknown backend %s registered for managed fd\n", back);
return 1;
}
//find exact match
for(u = 0; u < fds; u++){
if(fd[u].fd == new_fd && fd[u].backend == b){
if(!manage){
fd[u].fd = -1;
fd[u].backend = NULL;
fd[u].impl = NULL;
}
return 0;
}
}
if(!manage){
return 0;
}
//find free slot
for(u = 0; u < fds; u++){
if(fd[u].fd < 0){
break;
}
}
//if necessary expand
if(u == fds){
fd = realloc(fd, (fds + 1) * sizeof(managed_fd));
if(!fd){
fprintf(stderr, "Failed to allocate memory\n");
return 1;
}
fds++;
}
//store new fd
fd[u].fd = new_fd;
fd[u].backend = b;
fd[u].impl = impl;
return 0;
}
void fds_free(){
size_t u;
for(u = 0; u < fds; u++){
//TODO free impl
if(fd[u].fd >= 0){
close(fd[u].fd);
fd[u].fd = -1;
}
}
free(fd);
fds = 0;
fd = NULL;
}
int usage(char* fn){
fprintf(stderr, "MIDIMonster v0.1\n");
fprintf(stderr, "Usage:\n");
fprintf(stderr, "\t%s <configfile>\n", fn);
return EXIT_FAILURE;
}
int main(int argc, char** argv){
fd_set all_fds, read_fds;
struct timeval tv;
size_t u;
int rv = EXIT_FAILURE, error, maxfd = -1;
char* cfg_file = DEFAULT_CFG;
if(argc > 1){
cfg_file = argv[1];
}
//initialize backends
//TODO replace this with loading shared objects
if(artnet_init() || midi_init() /* || osc_init()*/){
fprintf(stderr, "Failed to initialize a backend\n");
goto bail;
}
//read config
if(config_read(cfg_file)){
fprintf(stderr, "Failed to read configuration file %s\n", cfg_file);
backends_stop();
channels_free();
instances_free();
map_free();
fds_free();
return usage(argv[0]);
}
//start backends
if(backends_start()){
fprintf(stderr, "Failed to start backends\n");
goto bail;
}
signal(SIGINT, signal_handler);
//create initial fd set
FD_ZERO(&all_fds);
for(u = 0; u < fds; u++){
if(fd[u].fd >= 0){
FD_SET(fd[u].fd, &all_fds);
maxfd = max(maxfd, fd[u].fd);
}
}
//process events
while(!shutdown_requested){
//wait for & translate events
read_fds = all_fds;
tv = backend_timeout();
error = select(maxfd + 1, &read_fds, NULL, NULL, &tv);
if(error < 0){
fprintf(stderr, "select failed: %s\n", strerror(errno));
break;
}
//TODO process all backends, collect events
//TODO push all events to backends
//FIXME notify non-fd backends
}
rv = EXIT_SUCCESS;
bail:
//free all data
backends_stop();
channels_free();
instances_free();
map_free();
fds_free();
return rv;
}
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