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/*
* Copyright (C) 2003-2009 The Music Player Daemon Project
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "volume.h"
#include "conf.h"
#include "player_control.h"
#include "idle.h"
#include "pcm_volume.h"
#include "config.h"
#include "output_all.h"
#include "mixer_control.h"
#include "mixer_all.h"
#include "mixer_type.h"
#include <glib.h>
#include <assert.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "volume"
#define SW_VOLUME_STATE "sw_volume: "
static enum mixer_type volume_mixer_type = MIXER_TYPE_HARDWARE;
static unsigned volume_software_set = 100;
/** the cached hardware mixer value; invalid if negative */
static int last_hardware_volume = -1;
/** the age of #last_hardware_volume */
static GTimer *hardware_volume_timer;
void volume_finish(void)
{
if (volume_mixer_type == MIXER_TYPE_HARDWARE)
g_timer_destroy(hardware_volume_timer);
}
void volume_init(void)
{
const struct config_param *param = config_get_param(CONF_MIXER_TYPE);
//hw mixing is by default
if (param) {
volume_mixer_type = mixer_type_parse(param->value);
switch (volume_mixer_type) {
case MIXER_TYPE_NONE:
case MIXER_TYPE_SOFTWARE:
mixer_disable_all();
break;
case MIXER_TYPE_HARDWARE:
//nothing to do
break;
case MIXER_TYPE_UNKNOWN:
g_error("unknown mixer type %s at line %i\n",
param->value, param->line);
}
}
if (volume_mixer_type == MIXER_TYPE_HARDWARE)
hardware_volume_timer = g_timer_new();
}
static int hardware_volume_get(void)
{
assert(hardware_volume_timer != NULL);
if (last_hardware_volume >= 0 &&
g_timer_elapsed(hardware_volume_timer, NULL) < 1.0)
/* throttle access to hardware mixers */
return last_hardware_volume;
last_hardware_volume = mixer_all_get_volume();
g_timer_start(hardware_volume_timer);
return last_hardware_volume;
}
static int software_volume_get(void)
{
return volume_software_set;
}
int volume_level_get(void)
{
switch (volume_mixer_type) {
case MIXER_TYPE_SOFTWARE:
return software_volume_get();
case MIXER_TYPE_HARDWARE:
return hardware_volume_get();
case MIXER_TYPE_NONE:
case MIXER_TYPE_UNKNOWN:
return -1;
}
/* unreachable */
assert(false);
return -1;
}
static bool software_volume_change(unsigned volume)
{
assert(volume <= 100);
volume_software_set = volume;
if (volume >= 100)
volume = PCM_VOLUME_1;
else if (volume <= 0)
volume = 0;
else
volume = pcm_float_to_volume((exp(volume / 25.0) - 1) /
(54.5981500331F - 1));
setPlayerSoftwareVolume(volume);
return true;
}
static bool hardware_volume_change(unsigned volume)
{
/* reset the cache */
last_hardware_volume = -1;
return mixer_all_set_volume(volume);
}
bool volume_level_change(unsigned volume)
{
assert(volume <= 100);
idle_add(IDLE_MIXER);
switch (volume_mixer_type) {
case MIXER_TYPE_HARDWARE:
return hardware_volume_change(volume);
case MIXER_TYPE_SOFTWARE:
return software_volume_change(volume);
default:
return true;
}
}
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 != 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) && sv >= 0 && sv <= 100)
software_volume_change(sv);
else
g_warning("Can't parse software volume: %s\n", buf);
return;
}
}
void save_sw_volume_state(FILE *fp)
{
if (volume_mixer_type == MIXER_TYPE_SOFTWARE)
fprintf(fp, SW_VOLUME_STATE "%u\n", volume_software_set);
}
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