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/*
* dolmetschctl
*
*
* Copyright (C) 2015 Christian Pointner <equinox@spreadspace.org>
*
* This file is part of dolmetschctl.
*
* dolmetschctl 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 3 of the License, or
* any later version.
*
* dolmetschctl 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 dolmetschctl. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <error.h>
#include <poll.h>
#include <assert.h>
#include <sys/types.h>
#include <dirent.h>
#include "mixer.h"
static void free_lang_entry(void* ptr)
{
lang_t* l = ptr;
assert(l);
free(l->name_);
slist_clear(&(l->cmds_));
free(l);
}
static int mixer_read_config_file(mixer_t* m, int dirfd, const char* filename)
{
assert(dirfd > 0);
int fd = openat(dirfd, filename, O_RDONLY);
if(fd < 0) {
error(0, errno, "erorr open('%s')", filename);
return -1;
}
FILE* conf = fdopen(fd, "r");
if(conf == NULL) {
error(0, errno, "erorr fdopen('%s')", filename);
return -1;
}
lang_t* lang = malloc(sizeof(lang_t));
assert(lang);
assert((lang->name_ = strdup(filename)));
slist_init(&(lang->cmds_), free);
assert(slist_add(&(m->langs_), lang));
char buf[256];
while(fgets(buf, sizeof(buf), conf) != NULL) {
midi_cmd_t* cmd = malloc(sizeof(midi_cmd_t));
if(!cmd) {
error(0, ENOMEM, "can't create midi command stucture");
break;
}
if(sscanf(buf, "%02hhx %02hhx %02hhx", &(cmd->code_[0]), &(cmd->code_[1]), &(cmd->code_[2])) != 3) {
continue;
}
assert(slist_add(&(lang->cmds_), cmd));
}
fclose(conf);
return 0;
}
static int mixer_read_config(mixer_t* m)
{
char path[1024];
int ret = snprintf(path, sizeof(path), "%s/%s", ETCDIR, m->name_);
assert(ret < sizeof(path));
DIR* d = opendir(path);
if(d == NULL) {
error(0, errno, "MIXER: cannot open config directory '%s'", path);
return -1;
}
struct dirent* entry;
while((entry = readdir(d))) {
if(entry->d_type == DT_REG) {
if((ret = mixer_read_config_file(m, dirfd(d), entry->d_name)))
break;
}
}
if(closedir(d) < 0) {
error(0, errno, "MIXER: cannot closeconfig directory '%s'", path);
return -1;
}
return ret;
}
int mixer_init(mixer_t* m, const char* name, const char* device)
{
assert(m != NULL);
m->name_ = name;
m->output_ = NULL;
slist_init(&(m->langs_), free_lang_entry);
int ret = snd_rawmidi_open(NULL, &(m->output_), device, SND_RAWMIDI_NONBLOCK);
if(ret < 0) {
error(0, 0, "MIXER: cannot open midi port '%s': %s", device, snd_strerror(ret));
return ret;
}
return mixer_read_config(m);;
}
static void mixer_print_midi_cmds(slist_t cmds)
{
if(!slist_length(&(cmds)))
printf("<no commands>\n");
else {
slist_element_t* tmp;
for(tmp = cmds.first_; tmp; tmp = tmp->next_) {
midi_cmd_t* c = (midi_cmd_t*)(tmp->data_);
printf(" 0x%02X 0x%02X 0x%02X\n", c->code_[0], c->code_[1], c->code_[2]);
}
}
}
void mixer_print_langs(mixer_t* m)
{
assert(m);
printf("mixer:\n");
if(!slist_length(&(m->langs_)))
printf(" <no languages>\n");
else {
slist_element_t* tmp;
for(tmp = m->langs_.first_; tmp; tmp = tmp->next_) {
lang_t* l = (lang_t*)(tmp->data_);
printf(" %s:\n", l->name_);
mixer_print_midi_cmds(l->cmds_);
}
}
}
int mixer_get_poll_fd_count(mixer_t* m)
{
return snd_rawmidi_poll_descriptors_count(m->output_);
}
int mixer_get_poll_fds(mixer_t* m, struct pollfd *pfds, int npfds)
{
return snd_rawmidi_poll_descriptors(m->output_, pfds, npfds);
}
int mixer_handle_revents(mixer_t* m, struct pollfd *pfds, int npfds)
{
int err;
unsigned short revents;
if((err = snd_rawmidi_poll_descriptors_revents(m->output_, pfds, npfds, &revents)) < 0) {
error(0, 0, "MIXER: cannot get poll events: %s", snd_strerror(errno));
return -1;
}
if(pfds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
error(0, 0, "MIXER: got POLLERR, POLLHUP or POLLNVAL");
return -1;
}
if(!(revents & POLLOUT))
return 0;
u_int8_t buf[3] = { 0xB0, 0x00, 0x02 };
int ret = snd_rawmidi_write(m->output_, buf, sizeof(buf));
if(ret == -EAGAIN)
return 0;
if(ret < 0) {
error(0, 0, "MIXER: cannot write to midi port: %s", snd_strerror(ret));
return -1;
}
assert(ret == sizeof(buf)); // TODO: try again??
if((err = snd_rawmidi_drain(m->output_)) < 0) {
error(0, 0, "MIXER: cannot drain output: %s", snd_strerror(err));
return -1;
}
return 0;
}
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