aboutsummaryrefslogtreecommitdiffhomepage
path: root/backends/osc.c
diff options
context:
space:
mode:
Diffstat (limited to 'backends/osc.c')
-rw-r--r--backends/osc.c813
1 files changed, 813 insertions, 0 deletions
diff --git a/backends/osc.c b/backends/osc.c
new file mode 100644
index 0000000..adc91f5
--- /dev/null
+++ b/backends/osc.c
@@ -0,0 +1,813 @@
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <netdb.h>
+#include <errno.h>
+#include <fcntl.h>
+#include "osc.h"
+
+/*
+ * TODO
+ * ping method
+ */
+
+#define osc_align(a) ((((a) / 4) + (((a) % 4) ? 1 : 0)) * 4)
+#define BACKEND_NAME "osc"
+
+int init(){
+ backend osc = {
+ .name = BACKEND_NAME,
+ .conf = backend_configure,
+ .create = backend_instance,
+ .conf_instance = backend_configure_instance,
+ .channel = backend_channel,
+ .handle = backend_set,
+ .process = backend_handle,
+ .start = backend_start,
+ .shutdown = backend_shutdown
+ };
+
+ //register backend
+ if(mm_backend_register(osc)){
+ fprintf(stderr, "Failed to register OSC backend\n");
+ return 1;
+ }
+ return 0;
+}
+
+static size_t osc_data_length(osc_parameter_type t){
+ switch(t){
+ case int32:
+ case float32:
+ return 4;
+ case int64:
+ case double64:
+ return 8;
+ default:
+ fprintf(stderr, "Invalid OSC format specified %c\n", t);
+ return 0;
+ }
+}
+
+static inline void osc_defaults(osc_parameter_type t, osc_parameter_value* max, osc_parameter_value* min){
+ memset(max, 0, sizeof(osc_parameter_value));
+ memset(min, 0, sizeof(osc_parameter_value));
+ switch(t){
+ case int32:
+ max->i32 = 255;
+ return;
+ case float32:
+ max->f = 1.0;
+ return;
+ case int64:
+ max->i64 = 1024;
+ return;
+ case double64:
+ max->d = 1.0;
+ return;
+ default:
+ fprintf(stderr, "Invalid OSC type, not setting any sane defaults\n");
+ return;
+ }
+}
+
+static inline osc_parameter_value osc_parse(osc_parameter_type t, uint8_t* data){
+ osc_parameter_value v = {0};
+ switch(t){
+ case int32:
+ case float32:
+ v.i32 = be32toh(*((int32_t*) data));
+ break;
+ case int64:
+ case double64:
+ v.i64 = be64toh(*((int64_t*) data));
+ break;
+ default:
+ fprintf(stderr, "Invalid OSC type passed to parsing routine\n");
+ }
+ return v;
+}
+
+static inline int osc_deparse(osc_parameter_type t, osc_parameter_value v, uint8_t* data){
+ uint64_t u64 = 0;
+ uint32_t u32 = 0;
+ switch(t){
+ case int32:
+ case float32:
+ u32 = htobe32(v.i32);
+ memcpy(data, &u32, sizeof(u32));
+ break;
+ case int64:
+ case double64:
+ u64 = htobe64(v.i64);
+ memcpy(data, &u64, sizeof(u64));
+ break;
+ default:
+ fprintf(stderr, "Invalid OSC type passed to parsing routine\n");
+ return 1;
+ }
+ return 0;
+}
+
+static inline osc_parameter_value osc_parse_value_spec(osc_parameter_type t, char* value){
+ osc_parameter_value v = {0};
+ switch(t){
+ case int32:
+ v.i32 = strtol(value, NULL, 0);
+ break;
+ case float32:
+ v.f = strtof(value, NULL);
+ break;
+ case int64:
+ v.i64 = strtoll(value, NULL, 0);
+ break;
+ case double64:
+ v.d = strtod(value, NULL);
+ break;
+ default:
+ fprintf(stderr, "Invalid OSC type passed to value parser\n");
+ }
+ return v;
+}
+
+static inline channel_value osc_parameter_normalise(osc_parameter_type t, osc_parameter_value min, osc_parameter_value max, osc_parameter_value cur){
+ channel_value v = {
+ .raw = {0},
+ .normalised = 0
+ };
+
+ union {
+ uint32_t u32;
+ float f32;
+ uint64_t u64;
+ double d64;
+ } range;
+
+ switch(t){
+ case int32:
+ range.u32 = max.i32 - min.i32;
+ v.raw.u64 = cur.i32 - min.i32;
+ v.normalised = v.raw.u64 / range.u32;
+ break;
+ case float32:
+ range.f32 = max.f - min.f;
+ v.raw.dbl = cur.f - min.f;
+ v.normalised = v.raw.dbl / range.f32;
+ break;
+ case int64:
+ range.u64 = max.i64 - min.i64;
+ v.raw.u64 = cur.i64 - min.i64;
+ v.normalised = v.raw.u64 / range.u64;
+ break;
+ case double64:
+ range.d64 = max.d - min.d;
+ v.raw.dbl = cur.d - min.d;
+ v.normalised = v.raw.dbl / range.d64;
+ break;
+ default:
+ fprintf(stderr, "Invalid OSC type passed to interpolation routine\n");
+ }
+
+ //fix overshoot
+ if(v.normalised > 1.0){
+ v.normalised = 1.0;
+ }
+ else if(v.normalised < 0.0){
+ v.normalised = 0.0;
+ }
+
+ return v;
+}
+
+static inline osc_parameter_value osc_parameter_denormalise(osc_parameter_type t, osc_parameter_value min, osc_parameter_value max, channel_value cur){
+ osc_parameter_value v = {0};
+
+ union {
+ uint32_t u32;
+ float f32;
+ uint64_t u64;
+ double d64;
+ } range;
+
+ switch(t){
+ case int32:
+ range.u32 = max.i32 - min.i32;
+ v.i32 = (range.u32 * cur.normalised) + min.i32;
+ break;
+ case float32:
+ range.f32 = max.f - min.f;
+ v.f = (range.f32 * cur.normalised) + min.f;
+ break;
+ case int64:
+ range.u64 = max.i64 - min.i64;
+ v.i64 = (range.u64 * cur.normalised) + min.i64;
+ break;
+ case double64:
+ range.d64 = max.d - min.d;
+ v.d = (range.d64 * cur.normalised) + min.d;
+ break;
+ default:
+ fprintf(stderr, "Invalid OSC type passed to interpolation routine\n");
+ }
+
+ return v;
+}
+
+static int osc_generate_event(channel* c, osc_channel* info, char* fmt, uint8_t* data, size_t data_len){
+ size_t p, off = 0;
+ if(!c || !info){
+ return 0;
+ }
+
+ osc_parameter_value min, max, cur;
+ channel_value evt;
+
+ if(!fmt || !data || data_len % 4 || !*fmt){
+ fprintf(stderr, "Invalid OSC packet, data length %zu\n", data_len);
+ return 1;
+ }
+
+ //find offset for this parameter
+ for(p = 0; p < info->param_index; p++){
+ off += osc_data_length(fmt[p]);
+ }
+
+ if(info->type != not_set){
+ max = info->max;
+ min = info->min;
+ }
+ else{
+ osc_defaults(fmt[info->param_index], &max, &min);
+ }
+
+ cur = osc_parse(fmt[info->param_index], data + off);
+ evt = osc_parameter_normalise(fmt[info->param_index], min, max, cur);
+
+ return mm_channel_event(c, evt);
+}
+
+static int osc_validate_path(char* path){
+ if(path[0] != '/'){
+ fprintf(stderr, "%s is not a valid OSC path: Missing root /\n", path);
+ return 1;
+ }
+ return 0;
+}
+
+static int osc_separate_hostspec(char* in, char** host, char** port){
+ size_t u;
+
+ if(!in || !host || !port){
+ return 1;
+ }
+
+ for(u = 0; in[u] && !isspace(in[u]); u++){
+ }
+
+ //guess
+ *host = in;
+
+ if(in[u]){
+ in[u] = 0;
+ *port = in + u + 1;
+ }
+ else{
+ //no port given
+ *port = NULL;
+ }
+ return 0;
+}
+
+static int osc_listener(char* host, char* port){
+ int fd = -1, status, yes = 1, flags;
+ struct addrinfo hints = {
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_DGRAM,
+ .ai_flags = AI_PASSIVE
+ };
+ struct addrinfo* info;
+ struct addrinfo* addr_it;
+
+ status = getaddrinfo(host, port, &hints, &info);
+ if(status){
+ fprintf(stderr, "Failed to get socket info for %s port %s: %s\n", host, port, gai_strerror(status));
+ return -1;
+ }
+
+ for(addr_it = info; addr_it != NULL; addr_it = addr_it->ai_next){
+ fd = socket(addr_it->ai_family, addr_it->ai_socktype, addr_it->ai_protocol);
+ if(fd < 0){
+ continue;
+ }
+
+ yes = 1;
+ if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void*)&yes, sizeof(yes)) < 0){
+ fprintf(stderr, "Failed to set SO_REUSEADDR on socket\n");
+ }
+
+ yes = 1;
+ if(setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (void*)&yes, sizeof(yes)) < 0){
+ fprintf(stderr, "Failed to set SO_BROADCAST on socket\n");
+ }
+
+ yes = 0;
+ if(setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, (void*)&yes, sizeof(yes)) < 0){
+ fprintf(stderr, "Failed to unset IP_MULTICAST_LOOP option: %s\n", strerror(errno));
+ }
+
+ status = bind(fd, addr_it->ai_addr, addr_it->ai_addrlen);
+ if(status < 0){
+ close(fd);
+ continue;
+ }
+
+ break;
+ }
+
+ freeaddrinfo(info);
+
+ if(!addr_it){
+ fprintf(stderr, "Failed to create listening socket for %s port %s\n", host, port);
+ return -1;
+ }
+
+ //set nonblocking
+ flags = fcntl(fd, F_GETFL, 0);
+ if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0){
+ fprintf(stderr, "Failed to set OSC descriptor nonblocking\n");
+ return -1;
+ }
+
+ return fd;
+}
+
+static int osc_parse_addr(char* host, char* port, struct sockaddr_storage* addr, socklen_t* len){
+ struct addrinfo* head;
+ struct addrinfo hints = {
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_DGRAM
+ };
+
+ int error = getaddrinfo(host, port, &hints, &head);
+ if(error || !head){
+ fprintf(stderr, "Failed to parse address %s port %s: %s\n", host, port, gai_strerror(error));
+ return 1;
+ }
+
+ memcpy(addr, head->ai_addr, head->ai_addrlen);
+ *len = head->ai_addrlen;
+
+ freeaddrinfo(head);
+ return 0;
+}
+
+static int backend_configure(char* option, char* value){
+ fprintf(stderr, "The OSC backend does not take any global configuration\n");
+ return 1;
+}
+
+static int backend_configure_instance(instance* inst, char* option, char* value){
+ osc_instance* data = (osc_instance*) inst->impl;
+ char* host = NULL, *port = NULL, *token = NULL, *format = NULL;
+ size_t u, p;
+
+ if(!strcmp(option, "root")){
+ if(osc_validate_path(value)){
+ fprintf(stderr, "Not a valid OSC root: %s\n", value);
+ return 1;
+ }
+
+ if(data->root){
+ free(data->root);
+ }
+ data->root = strdup(value);
+
+ if(!data->root){
+ fprintf(stderr, "Failed to allocate memory\n");
+ return 1;
+ }
+ return 0;
+ }
+ else if(!strcmp(option, "bind")){
+ if(osc_separate_hostspec(value, &host, &port)){
+ fprintf(stderr, "Invalid bind address for instance %s\n", inst->name);
+ return 1;
+ }
+
+ data->fd = osc_listener(host, port);
+ if(data->fd < 0){
+ fprintf(stderr, "Failed to bind for instance %s\n", inst->name);
+ return 1;
+ }
+ return 0;
+ }
+ else if(!strcmp(option, "dest") || !strcmp(option, "destination")){
+ if(!strncmp(value, "learn", 5)){
+ data->learn = 1;
+
+ //check if a forced port was provided
+ if(value[5] == '@'){
+ data->forced_rport = strtoul(value + 6, NULL, 0);
+ }
+ return 0;
+ }
+
+ if(osc_separate_hostspec(value, &host, &port)){
+ fprintf(stderr, "Invalid destination address for instance %s\n", inst->name);
+ return 1;
+ }
+
+ if(osc_parse_addr(host, port, &data->dest, &data->dest_len)){
+ fprintf(stderr, "Failed to parse destination address for instance %s\n", inst->name);
+ return 1;
+ }
+ return 0;
+ }
+ else if(*option == '/'){
+ //pre-configure channel
+ if(osc_validate_path(option)){
+ fprintf(stderr, "Not a valid OSC path: %s\n", option);
+ return 1;
+ }
+
+ for(u = 0; u < data->channels; u++){
+ if(!strcmp(option, data->channel[u].path)){
+ fprintf(stderr, "OSC channel %s already configured\n", option);
+ return 1;
+ }
+ }
+
+ //tokenize configuration
+ format = strtok(value, " ");
+ if(!format || strlen(format) < 1){
+ fprintf(stderr, "Not a valid format for OSC path %s\n", option);
+ return 1;
+ }
+
+ //check format validity, create subchannels
+ for(p = 0; p < strlen(format); p++){
+ if(!osc_data_length(format[p])){
+ fprintf(stderr, "Invalid format specifier %c for path %s, ignoring\n", format[p], option);
+ continue;
+ }
+
+ //register new sub-channel
+ data->channel = realloc(data->channel, (data->channels + 1) * sizeof(osc_channel));
+ if(!data->channel){
+ fprintf(stderr, "Failed to allocate memory\n");
+ return 1;
+ }
+
+ memset(data->channel + data->channels, 0, sizeof(osc_channel));
+ data->channel[data->channels].params = strlen(format);
+ data->channel[data->channels].param_index = p;
+ data->channel[data->channels].type = format[p];
+ data->channel[data->channels].path = strdup(option);
+
+ if(!data->channel[data->channels].path){
+ fprintf(stderr, "Failed to allocate memory\n");
+ return 1;
+ }
+
+ //parse min/max values
+ token = strtok(NULL, " ");
+ if(!token){
+ fprintf(stderr, "Missing minimum specification for parameter %zu of %s\n", p, option);
+ return 1;
+ }
+ data->channel[data->channels].min = osc_parse_value_spec(format[p], token);
+
+ token = strtok(NULL, " ");
+ if(!token){
+ fprintf(stderr, "Missing maximum specification for parameter %zu of %s\n", p, option);
+ return 1;
+ }
+ data->channel[data->channels].max = osc_parse_value_spec(format[p], token);
+
+ //allocate channel from core
+ if(!mm_channel(inst, data->channels, 1)){
+ fprintf(stderr, "Failed to register core channel\n");
+ return 1;
+ }
+
+ //increase channel count
+ data->channels++;
+ }
+ return 0;
+ }
+
+ fprintf(stderr, "Unknown configuration parameter %s for OSC backend\n", option);
+ return 1;
+}
+
+static instance* backend_instance(){
+ instance* inst = mm_instance();
+ if(!inst){
+ return NULL;
+ }
+
+ osc_instance* data = calloc(1, sizeof(osc_instance));
+ if(!data){
+ fprintf(stderr, "Failed to allocate memory\n");
+ return NULL;
+ }
+
+ data->fd = -1;
+ inst->impl = data;
+ return inst;
+}
+
+static channel* backend_channel(instance* inst, char* spec){
+ size_t u;
+ osc_instance* data = (osc_instance*) inst->impl;
+ size_t param_index = 0;
+
+ //check spec for correctness
+ if(osc_validate_path(spec)){
+ return NULL;
+ }
+
+ //parse parameter offset
+ if(strrchr(spec, ':')){
+ param_index = strtoul(strrchr(spec, ':') + 1, NULL, 10);
+ *(strrchr(spec, ':')) = 0;
+ }
+
+ //find matching channel
+ for(u = 0; u < data->channels; u++){
+ if(!strcmp(spec, data->channel[u].path) && data->channel[u].param_index == param_index){
+ //fprintf(stderr, "Reusing previously created channel %s parameter %zu\n", data->channel[u].path, data->channel[u].param_index);
+ break;
+ }
+ }
+
+ //allocate new channel
+ if(u == data->channels){
+ data->channel = realloc(data->channel, (u + 1) * sizeof(osc_channel));
+ if(!data->channel){
+ fprintf(stderr, "Failed to allocate memory\n");
+ return NULL;
+ }
+
+ memset(data->channel + u, 0, sizeof(osc_channel));
+ data->channel[u].param_index = param_index;
+ data->channel[u].path = strdup(spec);
+
+ if(!data->channel[u].path){
+ fprintf(stderr, "Failed to allocate memory\n");
+ return NULL;
+ }
+ data->channels++;
+ }
+
+ return mm_channel(inst, u, 1);
+}
+
+static int backend_set(instance* inst, size_t num, channel** c, channel_value* v){
+ uint8_t xmit_buf[OSC_XMIT_BUF], *format = NULL;
+ size_t evt = 0, off, members, p;
+ if(!num){
+ return 0;
+ }
+
+ osc_instance* data = (osc_instance*) inst->impl;
+ if(!data->dest_len){
+ fprintf(stderr, "OSC instance %s does not have a destination, output is disabled (%zu channels)\n", inst->name, num);
+ return 0;
+ }
+
+ for(evt = 0; evt < num; evt++){
+ off = c[evt]->ident;
+
+ //sanity check
+ if(off >= data->channels){
+ fprintf(stderr, "OSC channel identifier out of range\n");
+ return 1;
+ }
+
+ //if the format is unknown, don't output
+ if(data->channel[off].type == not_set || data->channel[off].params == 0){
+ fprintf(stderr, "OSC channel %s.%s requires format specification for output\n", inst->name, data->channel[off].path);
+ continue;
+ }
+
+ //update current value
+ data->channel[off].current = osc_parameter_denormalise(data->channel[off].type, data->channel[off].min, data->channel[off].max, v[evt]);
+ //mark channel
+ data->channel[off].mark = 1;
+ }
+
+ //fix destination rport if required
+ if(data->forced_rport){
+ //cheating a bit because both IPv4 and IPv6 have the port at the same offset
+ struct sockaddr_in* sockadd = (struct sockaddr_in*) &(data->dest);
+ sockadd->sin_port = htobe16(data->forced_rport);
+ }
+
+ //find all marked channels
+ for(evt = 0; evt < data->channels; evt++){
+ //zero output buffer
+ memset(xmit_buf, 0, sizeof(xmit_buf));
+ if(data->channel[evt].mark){
+ //determine minimum packet size
+ if(osc_align((data->root ? strlen(data->root) : 0) + strlen(data->channel[evt].path) + 1) + osc_align(data->channel[evt].params + 2) >= sizeof(xmit_buf)){
+ fprintf(stderr, "Insufficient buffer size for OSC transmitting channel %s.%s\n", inst->name, data->channel[evt].path);
+ return 1;
+ }
+
+ off = 0;
+ //copy osc target path
+ if(data->root){
+ memcpy(xmit_buf, data->root, strlen(data->root));
+ off += strlen(data->root);
+ }
+ memcpy(xmit_buf + off, data->channel[evt].path, strlen(data->channel[evt].path));
+ off += strlen(data->channel[evt].path) + 1;
+ off = osc_align(off);
+
+ //get format string offset, initialize
+ format = xmit_buf + off;
+ off += osc_align(data->channel[evt].params + 2);
+ *format = ',';
+ format++;
+
+ //gather subchannels, unmark
+ members = 0;
+ for(p = 0; p < data->channels && members < data->channel[evt].params; p++){
+ if(!strcmp(data->channel[evt].path, data->channel[p].path)){
+ //unmark channel
+ data->channel[p].mark = 0;
+
+ //sanity check
+ if(data->channel[p].param_index >= data->channel[evt].params){
+ fprintf(stderr, "OSC channel %s.%s has multiple parameter offset definitions\n", inst->name, data->channel[evt].path);
+ return 1;
+ }
+
+ //write format specifier
+ format[data->channel[p].param_index] = data->channel[p].type;
+
+ //write data
+ //FIXME this currently depends on all channels being registered in the correct order, since it just appends data
+ if(off + osc_data_length(data->channel[p].type) >= sizeof(xmit_buf)){
+ fprintf(stderr, "Insufficient buffer size for OSC transmitting channel %s.%s at parameter %zu\n", inst->name, data->channel[evt].path, members);
+ return 1;
+ }
+
+ osc_deparse(data->channel[p].type, data->channel[p].current, xmit_buf + off);
+ off += osc_data_length(data->channel[p].type);
+ members++;
+ }
+ }
+
+ //output packet
+ if(sendto(data->fd, xmit_buf, off, 0, (struct sockaddr*) &(data->dest), data->dest_len) < 0){
+ fprintf(stderr, "Failed to transmit OSC packet: %s\n", strerror(errno));
+ }
+ }
+ }
+ return 0;
+}
+
+static int backend_handle(size_t num, managed_fd* fds){
+ size_t fd;
+ char recv_buf[OSC_RECV_BUF];
+ instance* inst = NULL;
+ osc_instance* data = NULL;
+ ssize_t bytes_read = 0;
+ size_t c;
+ char* osc_fmt = NULL;
+ char* osc_local = NULL;
+ uint8_t* osc_data = NULL;
+
+ for(fd = 0; fd < num; fd++){
+ inst = (instance*) fds[fd].impl;
+ if(!inst){
+ fprintf(stderr, "OSC backend signaled for unknown fd\n");
+ continue;
+ }
+
+ data = (osc_instance*) inst->impl;
+
+ do{
+ if(data->learn){
+ data->dest_len = sizeof(data->dest);
+ bytes_read = recvfrom(fds[fd].fd, recv_buf, sizeof(recv_buf), 0, (struct sockaddr*) &(data->dest), &(data->dest_len));
+ }
+ else{
+ bytes_read = recv(fds[fd].fd, recv_buf, sizeof(recv_buf), 0);
+ }
+ if(data->root && strncmp(recv_buf, data->root, strlen(data->root))){
+ //ignore packet for different root
+ continue;
+ }
+ osc_local = recv_buf + (data->root ? strlen(data->root) : 0);
+
+ if(bytes_read < 0){
+ break;
+ }
+
+ osc_fmt = recv_buf + osc_align(strlen(recv_buf) + 1);
+ if(*osc_fmt != ','){
+ //invalid format string
+ fprintf(stderr, "Invalid OSC format string in packet\n");
+ continue;
+ }
+ osc_fmt++;
+
+ osc_data = (uint8_t*) osc_fmt + (osc_align(strlen(osc_fmt) + 2) - 1);
+ //FIXME check supplied data length
+
+ for(c = 0; c < data->channels; c++){
+ //FIXME implement proper OSC path match
+ //prefix match
+ if(!strcmp(osc_local, data->channel[c].path)){
+ if(strlen(osc_fmt) > data->channel[c].param_index){
+ //fprintf(stderr, "Taking parameter %zu of %s (%s), %zd bytes, data offset %zu\n", data->channel[c].param_index, recv_buf, osc_fmt, bytes_read, (osc_data - (uint8_t*)recv_buf));
+ if(osc_generate_event(mm_channel(inst, c, 0), data->channel + c, osc_fmt, osc_data, bytes_read - (osc_data - (uint8_t*) recv_buf))){
+ fprintf(stderr, "Failed to generate OSC channel event\n");
+ }
+ }
+ }
+ }
+ } while(bytes_read > 0);
+
+ if(bytes_read < 0 && errno != EAGAIN){
+ fprintf(stderr, "OSC failed to receive data for instance %s: %s\n", inst->name, strerror(errno));
+ }
+
+ if(bytes_read == 0){
+ fprintf(stderr, "OSC descriptor for instance %s closed\n", inst->name);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int backend_start(){
+ size_t n, u, fds = 0;
+ instance** inst = NULL;
+ osc_instance* data = NULL;
+
+ //fetch all instances
+ if(mm_backend_instances(BACKEND_NAME, &n, &inst)){
+ fprintf(stderr, "Failed to fetch instance list\n");
+ return 1;
+ }
+
+ if(!n){
+ free(inst);
+ return 0;
+ }
+
+ //update instance identifiers
+ for(u = 0; u < n; u++){
+ data = (osc_instance*) inst[u]->impl;
+
+ if(data->fd >= 0){
+ inst[u]->ident = data->fd;
+ if(mm_manage_fd(data->fd, BACKEND_NAME, 1, inst[u])){
+ fprintf(stderr, "Failed to register OSC descriptor for instance %s\n", inst[u]->name);
+ free(inst);
+ return 1;
+ }
+ fds++;
+ }
+ else{
+ inst[u]->ident = -1;
+ }
+ }
+
+ fprintf(stderr, "OSC backend registered %zu descriptors to core\n", fds);
+
+ free(inst);
+ return 0;
+}
+
+static int backend_shutdown(){
+ size_t n, u, c;
+ instance** inst = NULL;
+ osc_instance* data = NULL;
+
+ if(mm_backend_instances(BACKEND_NAME, &n, &inst)){
+ fprintf(stderr, "Failed to fetch instance list\n");
+ return 1;
+ }
+
+ for(u = 0; u < n; u++){
+ data = (osc_instance*) inst[u]->impl;
+ for(c = 0; c < data->channels; c++){
+ free(data->channel[c].path);
+ }
+ free(data->channel);
+ free(data->root);
+ close(data->fd);
+ data->fd = -1;
+ data->channels = 0;
+ free(inst[u]->impl);
+ }
+
+ free(inst);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 20:11:03 +0000