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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program 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 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "volume.h"
#include "conf.h"
#include "player_control.h"
#include "idle.h"
#include "pcm_volume.h"
#include "config.h"
#include "audio.h"
#include <glib.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "volume"
#define VOLUME_MIXER_TYPE_SOFTWARE 0
#define VOLUME_MIXER_TYPE_HARDWARE 1
#define VOLUME_MIXER_SOFTWARE_DEFAULT ""
#define SW_VOLUME_STATE "sw_volume: "
const struct audio_output_plugin *default_mixer;
static int volume_mixer_type = VOLUME_MIXER_TYPE_HARDWARE;
static int volume_software_set = 100;
void volume_finish(void)
{
}
static void
mixer_reconfigure(char *driver)
{
ConfigParam *newparam, *param;
//create parameter list
newparam = newConfigParam(NULL, -1);
param = getConfigParam(CONF_MIXER_DEVICE);
if (param) {
g_warning("deprecated option mixer_device found, translating to %s config section\n", driver);
addBlockParam(newparam, "mixer_device", param->value, -1);
}
param = getConfigParam(CONF_MIXER_CONTROL);
if (param) {
g_warning("deprecated option mixer_control found, translating to %s config section\n", driver);
addBlockParam(newparam, "mixer_control", param->value, -1);
}
if (newparam->numberOfBlockParams > 0) {
//call configure method of corrensponding mixer
if (!mixer_configure_legacy(driver, newparam)) {
g_error("Using mixer_type '%s' with not enabled %s output", driver, driver);
}
}
//free parameter list
config_param_free(newparam, NULL);
}
void volume_init(void)
{
ConfigParam *param = getConfigParam(CONF_MIXER_TYPE);
//hw mixing is by default
if (param) {
if (strcmp(param->value, VOLUME_MIXER_SOFTWARE) == 0) {
volume_mixer_type = VOLUME_MIXER_TYPE_SOFTWARE;
} else if (strcmp(param->value, VOLUME_MIXER_HARDWARE) == 0) {
//nothing to do
} else {
//fallback to old config behaviour
if (strcmp(param->value, VOLUME_MIXER_OSS) == 0) {
mixer_reconfigure(param->value);
} else if (strcmp(param->value, VOLUME_MIXER_ALSA) == 0) {
mixer_reconfigure(param->value);
} else {
g_error("unknown mixer type %s at line %i\n",
param->value, param->line);
}
}
}
}
static int hardware_volume_get(void)
{
int device, count;
int volume, volume_total, volume_ok;
volume_total = 0;
volume_ok = 0;
count = audio_output_count();
for (device=0; device<count ;device++) {
if (mixer_control_getvol(device, &volume)) {
g_debug("device %d: volume: %d\n", device, volume);
volume_total += volume;
volume_ok++;
}
}
if (volume_ok > 0) {
//return average
return volume_total / volume_ok;
} else {
return -1;
}
}
static int software_volume_get(void)
{
return volume_software_set;
}
int volume_level_get(void)
{
switch (volume_mixer_type) {
case VOLUME_MIXER_TYPE_SOFTWARE:
return software_volume_get();
case VOLUME_MIXER_TYPE_HARDWARE:
return hardware_volume_get();
default:
return -1;
}
return -1;
}
static int software_volume_change(int change, int rel)
{
int new = change;
if (rel)
new += volume_software_set;
if (new > 100)
new = 100;
else if (new < 0)
new = 0;
volume_software_set = new;
/*new = 100.0*(exp(new/50.0)-1)/(M_E*M_E-1)+0.5; */
if (new >= 100)
new = PCM_VOLUME_1;
else if (new <= 0)
new = 0;
else
new = pcm_float_to_volume((exp(new / 25.0) - 1) /
(54.5981500331F - 1));
setPlayerSoftwareVolume(new);
return 0;
}
static int hardware_volume_change(int change, int rel)
{
int device, count;
count = audio_output_count();
for (device=0; device<count ;device++) {
mixer_control_setvol(device, change, rel);
}
return 0;
}
int volume_level_change(int change, int rel)
{
idle_add(IDLE_MIXER);
switch (volume_mixer_type) {
case VOLUME_MIXER_TYPE_HARDWARE:
return hardware_volume_change(change, rel);
case VOLUME_MIXER_TYPE_SOFTWARE:
return software_volume_change(change, rel);
default:
return 0;
}
}
void read_sw_volume_state(FILE *fp)
{
char buf[sizeof(SW_VOLUME_STATE) + sizeof("100") - 1];
char *end = NULL;
long int sv;
if (volume_mixer_type != VOLUME_MIXER_TYPE_SOFTWARE)
return;
while (fgets(buf, sizeof(buf), fp)) {
if (!g_str_has_prefix(buf, SW_VOLUME_STATE))
continue;
g_strchomp(buf);
sv = strtol(buf + strlen(SW_VOLUME_STATE), &end, 10);
if (G_LIKELY(!*end))
software_volume_change(sv, 0);
else
g_warning("Can't parse software volume: %s\n", buf);
return;
}
}
void save_sw_volume_state(FILE *fp)
{
if (volume_mixer_type == VOLUME_MIXER_TYPE_SOFTWARE)
fprintf(fp, SW_VOLUME_STATE "%d\n", volume_software_set);
}
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