ref: 08bfb9fbad08764b760549fb139fbd3a45df5a03
dir: /osc_out.c/
#include "osc_out.h"
#include <arpa/inet.h>
#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
struct Oosc_dev {
int fd;
// Just keep the whole list around, since juggling the strict-aliasing
// problems with sockaddr_storage is not worth it.
struct addrinfo* chosen;
struct addrinfo* head;
};
Oosc_udp_create_error oosc_dev_create_udp(Oosc_dev** out_ptr,
char const* dest_addr,
char const* dest_port) {
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = 0;
hints.ai_flags = AI_ADDRCONFIG;
struct addrinfo* chosen = NULL;
struct addrinfo* head = NULL;
int err = getaddrinfo(dest_addr, dest_port, &hints, &head);
if (err != 0) {
fprintf(stderr, "Failed to get address info, error: %d\n", errno);
return Oosc_udp_create_error_getaddrinfo_failed;
}
// Special behavior: if no hostname was provided, we'll get loopback(s) from
// getaddrinfo. Which is good. But on systems with both an ipv4 and ipv6
// address, we might get the ipv6 address listed first. And the OSC server,
// for example Plogue Bidule, might not support ipv6. And defaulting to the
// ipv6 loopback wouldn't work, in that case. So if there's no hostname, and
// we find an ipv4 address in the results, prefer to use that.
//
// Actually let's just prefer ipv4 completely for now
#if 0
if (!dest_addr) {
#endif
{
for (struct addrinfo* a = head; a; a = a->ai_next) {
if (a->ai_family != AF_INET)
continue;
chosen = a;
break;
}
}
if (!chosen)
chosen = head;
#if 0
for (struct addrinfo* a = head; a; a = a->ai_next) {
char buff[INET6_ADDRSTRLEN];
char const* str = NULL;
if (a->ai_family == AF_INET) {
str = inet_ntop(AF_INET, &((struct sockaddr_in*)a->ai_addr)->sin_addr,
buff, sizeof(buff));
} else if (a->ai_family == AF_INET6) {
str = inet_ntop(AF_INET6, &((struct sockaddr_in6*)a->ai_addr)->sin6_addr,
buff, sizeof(buff));
}
if (str) {
fprintf(stderr, "ntop name: %s\n", str);
} else {
fprintf(stderr, "inet_ntop error\n");
}
}
#endif
int udpfd =
socket(chosen->ai_family, chosen->ai_socktype, chosen->ai_protocol);
if (udpfd < 0) {
fprintf(stderr, "Failed to open UDP socket, error number: %d\n", errno);
freeaddrinfo(head);
return Oosc_udp_create_error_couldnt_open_socket;
}
Oosc_dev* dev = malloc(sizeof(Oosc_dev));
dev->fd = udpfd;
dev->chosen = chosen;
dev->head = head;
*out_ptr = dev;
return Oosc_udp_create_error_ok;
}
void oosc_dev_destroy(Oosc_dev* dev) {
close(dev->fd);
freeaddrinfo(dev->head);
free(dev);
}
static void oosc_send_datagram(Oosc_dev* dev, char const* data, Usz size) {
ssize_t res = sendto(dev->fd, data, size, 0, dev->chosen->ai_addr,
dev->chosen->ai_addrlen);
if (res < 0) {
fprintf(stderr, "UDP message send failed\n");
exit(1);
}
}
static bool oosc_write_strn(char* restrict buffer, Usz buffer_size,
Usz* buffer_pos, char const* restrict in_str,
Usz in_str_len) {
// no overflow check, should be fine
Usz in_plus_null = in_str_len + 1;
Usz null_pad = (4 - in_plus_null % 4) % 4;
Usz needed = in_plus_null + null_pad;
Usz cur_pos = *buffer_pos;
if (cur_pos + needed >= buffer_size)
return false;
for (Usz i = 0; i < in_str_len; ++i) {
buffer[cur_pos + i] = in_str[i];
}
buffer[cur_pos + in_str_len] = 0;
cur_pos += in_plus_null;
for (Usz i = 0; i < null_pad; ++i) {
buffer[cur_pos + i] = 0;
}
*buffer_pos = cur_pos + null_pad;
return true;
}
void oosc_send_int32s(Oosc_dev* dev, char const* osc_address, I32 const* vals,
Usz count) {
char buffer[2048];
Usz buf_pos = 0;
if (!oosc_write_strn(buffer, sizeof(buffer), &buf_pos, osc_address,
strlen(osc_address)))
return;
Usz typetag_str_size = 1 + count + 1; // comma, 'i'... , null
Usz typetag_str_null_pad = (4 - typetag_str_size % 4) % 4;
if (buf_pos + typetag_str_size + typetag_str_null_pad > sizeof(buffer))
return;
buffer[buf_pos] = ',';
++buf_pos;
for (Usz i = 0; i < count; ++i) {
buffer[buf_pos + i] = 'i';
}
buffer[buf_pos + count] = 0;
buf_pos += count + 1;
for (Usz i = 0; i < typetag_str_null_pad; ++i) {
buffer[buf_pos + i] = 0;
}
buf_pos += typetag_str_null_pad;
Usz ints_size = count * sizeof(I32);
if (buf_pos + ints_size > sizeof(buffer))
return;
for (Usz i = 0; i < count; ++i) {
union {
I32 i;
U32 u;
} pun;
pun.i = vals[i];
U32 u_ne = htonl(pun.u);
memcpy(buffer + buf_pos, &u_ne, sizeof(u_ne));
buf_pos += sizeof(u_ne);
}
oosc_send_datagram(dev, buffer, buf_pos);
}
void susnote_list_init(Susnote_list* sl) {
sl->buffer = NULL;
sl->count = 0;
sl->capacity = 0;
}
void susnote_list_deinit(Susnote_list* sl) { free(sl->buffer); }
void susnote_list_clear(Susnote_list* sl) { sl->count = 0; }
void susnote_list_add_notes(Susnote_list* sl, Susnote const* restrict notes,
Usz added_count, Usz* restrict start_removed,
Usz* restrict end_removed) {
Susnote* buffer = sl->buffer;
Usz count = sl->count;
Usz cap = sl->capacity;
Usz rem = count + added_count;
if (cap < rem) {
cap = rem < 16 ? 16 : orca_round_up_power2(rem);
buffer = realloc(buffer, cap * sizeof(Susnote));
sl->capacity = cap;
sl->buffer = buffer;
}
*start_removed = rem;
Usz i_in = 0;
for (; i_in < added_count; ++i_in) {
Susnote this_in = notes[i_in];
for (Usz i_old = 0; i_old < count; ++i_old) {
Susnote this_old = buffer[i_old];
if (this_old.chan_note == this_in.chan_note) {
buffer[i_old] = this_in;
buffer[rem] = this_old;
++rem;
goto next_in;
}
}
buffer[count] = this_in;
++count;
next_in:;
}
sl->count = count;
*end_removed = rem;
}
void susnote_list_advance_time(Susnote_list* sl, double delta_time,
Usz* restrict start_removed,
Usz* restrict end_removed,
double* soonest_deadline) {
Susnote* restrict buffer = sl->buffer;
Usz count = sl->count;
*end_removed = count;
float delta_float = (float)delta_time;
float soonest = 1.0f;
for (Usz i = 0; i < count;) {
Susnote sn = buffer[i];
sn.remaining -= delta_float;
if (sn.remaining > 0) {
if (sn.remaining < soonest)
soonest = sn.remaining;
buffer[i].remaining = sn.remaining;
++i;
} else {
buffer[i] = buffer[count - 1];
buffer[count - 1] = sn;
--count;
}
}
*start_removed = count;
*soonest_deadline = (double)soonest;
sl->count = count;
}
double susnote_list_soonest_deadline(Susnote_list const* sl) {
float soonest = 1.0f;
Susnote const* buffer = sl->buffer;
for (Usz i = 0, n = sl->count; i < n; ++i) {
float rem = buffer[i].remaining;
if (rem < soonest)
soonest = rem;
}
return (double)soonest;
}