/*
* out_audio.c Save events
*
* Copyright (c) 2001-2005 Thomas Graf <tgraf@suug.ch>
* Claudio Mettler <claudio@fnord.ch>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <bmon/bmon.h>
#include <bmon/node.h>
#include <bmon/output.h>
#include <bmon/graph.h>
#include <bmon/input.h>
#include <bmon/utils.h>
#include <inttypes.h>
#include <alsa/asoundlib.h>
static int c_max = 1000;
static int divisor;
static snd_seq_t *seq_handle;
static snd_seq_event_t ev;
#define CELL_MAX 127.0f
void audio_draw(void)
{
rate_cnt_t rx, tx;
stat_attr_t *a;
item_t *it = get_current_item();
if (it == NULL)
return;
a = current_attr(it->i_graph_sel);
if (a == NULL)
return;
rx = attr_get_rx_rate(a);
tx = attr_get_tx_rate(a);
if (rx > c_max)
rx = c_max;
if (tx > c_max)
tx = c_max;
rx /= divisor;
tx /= divisor;
snd_seq_ev_set_noteon(&ev, 0, rx, 127);
snd_seq_event_output_direct(seq_handle, &ev);
snd_seq_ev_set_noteoff(&ev, 0, rx, 127);
snd_seq_event_output_direct(seq_handle, &ev);
snd_seq_ev_set_noteon(&ev, 1, tx, 127);
snd_seq_event_output_direct(seq_handle, &ev);
snd_seq_ev_set_noteoff(&ev, 1, tx, 127);
snd_seq_event_output_direct(seq_handle, &ev);
}
static void print_module_help(void)
{
printf(
"Audio - Audio Output\n" \
"\n" \
" Outputs the currently selected attribute rate as MIDI\n" \
" sequence. OUT ::= (max(RATE,MAX)) / (MAX/127)\n" \
"\n" \
" Authors: Claudio Mettler <claudio@fnord.ch>\n" \
" Thomas Graf <tgraf@suug.ch>\n" \
"\n" \
" Options:\n" \
" max=NUM Upper limit\n");
}
static void audio_set_opts(tv_t *attrs)
{
while (attrs) {
if (!strcasecmp(attrs->type, "max") && attrs->value)
c_max = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "help")) {
print_module_help();
exit(0);
}
attrs = attrs->next;
}
}
static void audio_shutdown(void)
{
}
static int audio_probe(void)
{
snd_seq_addr_t src;
if (snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_OUTPUT, 0) < 0) {
quit("Failed to access the ALSA sequencer.");
return 0;
}
snd_seq_set_client_name(seq_handle, "bmonmidibridge");
src.client = snd_seq_client_id(seq_handle);
src.port = snd_seq_create_simple_port(seq_handle, "Output",
SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ,
SND_SEQ_PORT_TYPE_APPLICATION);
snd_seq_ev_clear(&ev);
snd_seq_ev_set_source(&ev, src.port);
snd_seq_ev_set_subs(&ev);
snd_seq_ev_set_direct(&ev);
divisor = ceil(((double) c_max / CELL_MAX));
return 1;
}
static struct output_module audio_ops = {
.om_name = "audio",
.om_draw = audio_draw,
.om_set_opts = audio_set_opts,
.om_probe = audio_probe,
.om_shutdown audio_shutdown,
};
static void __init audio_init(void)
{
register_secondary_output_module(&audio_ops);
}
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>