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/*
* RawMIDI Interface - main file
* Copyright (c) 2000 by Jaroslav Kysela <perex@suse.cz>
* Abramo Bagnara <abramo@alsa-project.org>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <dlfcn.h>
#include "rawmidi_local.h"
#include "asoundlib.h"
int snd_rawmidi_close(snd_rawmidi_t *rmidi)
{
int err;
assert(rmidi);
if ((err = rmidi->ops->close(rmidi)) < 0)
return err;
if (rmidi->name)
free(rmidi->name);
free(rmidi);
return 0;
}
int snd_rawmidi_poll_descriptor(snd_rawmidi_t *rmidi)
{
assert(rmidi);
return rmidi->poll_fd;
}
int snd_rawmidi_nonblock(snd_rawmidi_t *rmidi, int nonblock)
{
int err;
assert(rmidi);
assert(!(rmidi->mode & SND_RAWMIDI_APPEND));
if ((err = rmidi->ops->nonblock(rmidi, nonblock)) < 0)
return err;
if (nonblock)
rmidi->mode |= SND_RAWMIDI_NONBLOCK;
else
rmidi->mode &= ~SND_RAWMIDI_NONBLOCK;
return 0;
}
int snd_rawmidi_info(snd_rawmidi_t *rmidi, snd_rawmidi_info_t * info)
{
assert(rmidi && info);
return rmidi->ops->info(rmidi, info);
}
int snd_rawmidi_params(snd_rawmidi_t *rmidi, snd_rawmidi_params_t * params)
{
assert(rmidi && params);
return rmidi->ops->params(rmidi, params);
}
int snd_rawmidi_status(snd_rawmidi_t *rmidi, snd_rawmidi_status_t * status)
{
assert(rmidi && status);
return rmidi->ops->status(rmidi, status);
}
int snd_rawmidi_drop(snd_rawmidi_t *rmidi, int str)
{
assert(rmidi);
assert(str >= 0 && str <= 1);
assert(rmidi->streams & (1 << str));
return rmidi->ops->drop(rmidi, str);
}
int snd_rawmidi_output_drop(snd_rawmidi_t *rmidi)
{
return snd_rawmidi_drop(rmidi, SND_RAWMIDI_STREAM_OUTPUT);
}
int snd_rawmidi_drain(snd_rawmidi_t *rmidi, int str)
{
assert(rmidi);
assert(str >= 0 && str <= 1);
assert(rmidi->streams & (1 << str));
return rmidi->ops->drain(rmidi, str);
}
int snd_rawmidi_output_drain(snd_rawmidi_t *rmidi)
{
return snd_rawmidi_drain(rmidi, SND_RAWMIDI_STREAM_OUTPUT);
}
int snd_rawmidi_input_drain(snd_rawmidi_t *rmidi)
{
return snd_rawmidi_drain(rmidi, SND_RAWMIDI_STREAM_INPUT);
}
ssize_t snd_rawmidi_write(snd_rawmidi_t *rmidi, const void *buffer, size_t size)
{
assert(rmidi && (buffer || size == 0));
return rmidi->ops->write(rmidi, buffer, size);
}
ssize_t snd_rawmidi_read(snd_rawmidi_t *rmidi, void *buffer, size_t size)
{
assert(rmidi && (buffer || size == 0));
return rmidi->ops->read(rmidi, buffer, size);
}
int snd_rawmidi_open(snd_rawmidi_t **rawmidip, char *name,
int streams, int mode)
{
char *str;
int err;
snd_config_t *rawmidi_conf, *conf, *type_conf;
snd_config_iterator_t i;
char *lib = NULL, *open = NULL;
int (*open_func)(snd_rawmidi_t **rawmidip, char *name, snd_config_t *conf,
int streams, int mode);
void *h;
assert(rawmidip && name);
err = snd_config_update();
if (err < 0)
return err;
err = snd_config_searchv(snd_config, &rawmidi_conf, "rawmidi", name, 0);
if (err < 0) {
int card, dev, subdev;
err = sscanf(name, "hw:%d,%d,%d", &card, &dev, &subdev);
if (err == 3)
return snd_rawmidi_hw_open(rawmidip, name, card, dev, subdev, streams, mode);
err = sscanf(name, "hw:%d,%d", &card, &dev);
if (err == 2)
return snd_rawmidi_hw_open(rawmidip, name, card, dev, -1, streams, mode);
ERR("Unknown RAWMIDI %s", name);
return -ENOENT;
}
if (snd_config_type(rawmidi_conf) != SND_CONFIG_TYPE_COMPOUND) {
ERR("Invalid type for RAWMIDI %s definition", name);
return -EINVAL;
}
err = snd_config_search(rawmidi_conf, "streams", &conf);
if (err >= 0) {
err = snd_config_string_get(conf, &str);
if (err < 0) {
ERR("Invalid type for %s", conf->id);
return err;
}
if (strcmp(str, "output") == 0) {
if (streams == SND_RAWMIDI_OPEN_INPUT)
return -EINVAL;
} else if (strcmp(str, "input") == 0) {
if (streams == SND_RAWMIDI_OPEN_OUTPUT)
return -EINVAL;
} else if (strcmp(str, "duplex") == 0) {
if (streams != SND_RAWMIDI_OPEN_DUPLEX)
return -EINVAL;
} else {
ERR("Invalid value for %s", conf->id);
return -EINVAL;
}
}
err = snd_config_search(rawmidi_conf, "type", &conf);
if (err < 0) {
ERR("type is not defined");
return err;
}
err = snd_config_string_get(conf, &str);
if (err < 0) {
ERR("Invalid type for %s", conf->id);
return err;
}
err = snd_config_searchv(snd_config, &type_conf, "rawmiditype", str, 0);
if (err < 0) {
ERR("Unknown RAWMIDI type %s", str);
return err;
}
snd_config_foreach(i, type_conf) {
snd_config_t *n = snd_config_entry(i);
if (strcmp(n->id, "comment") == 0)
continue;
if (strcmp(n->id, "lib") == 0) {
err = snd_config_string_get(n, &lib);
if (err < 0) {
ERR("Invalid type for %s", n->id);
return -EINVAL;
}
continue;
}
if (strcmp(n->id, "open") == 0) {
err = snd_config_string_get(n, &open);
if (err < 0) {
ERR("Invalid type for %s", n->id);
return -EINVAL;
}
continue;
ERR("Unknown field %s", n->id);
return -EINVAL;
}
}
if (!open) {
ERR("open is not defined");
return -EINVAL;
}
if (!lib)
lib = "libasound.so";
h = dlopen(lib, RTLD_NOW);
if (!h) {
ERR("Cannot open shared library %s", lib);
return -ENOENT;
}
open_func = dlsym(h, open);
dlclose(h);
if (!open_func) {
ERR("symbol %s is not defined inside %s", open, lib);
return -ENXIO;
}
return open_func(rawmidip, name, rawmidi_conf, streams, mode);
}
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