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/*
* Copyright (C) 2003-2010 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 "config.h"
#include "output_control.h"
#include "output_api.h"
#include "output_internal.h"
#include "output_list.h"
#include "audio_parser.h"
#include "mixer_control.h"
#include "mixer_type.h"
#include "mixer_list.h"
#include "mixer/software_mixer_plugin.h"
#include "filter_plugin.h"
#include "filter_registry.h"
#include "filter_config.h"
#include "filter/chain_filter_plugin.h"
#include "filter/autoconvert_filter_plugin.h"
#include <glib.h>
#include <assert.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "output"
#define AUDIO_OUTPUT_TYPE "type"
#define AUDIO_OUTPUT_NAME "name"
#define AUDIO_OUTPUT_FORMAT "format"
#define AUDIO_FILTERS "filters"
static const struct audio_output_plugin *
audio_output_detect(GError **error)
{
const struct audio_output_plugin *plugin;
unsigned i;
g_warning("Attempt to detect audio output device");
audio_output_plugins_for_each(plugin, i) {
if (plugin->test_default_device == NULL)
continue;
g_warning("Attempting to detect a %s audio device",
plugin->name);
if (ao_plugin_test_default_device(plugin))
return plugin;
}
g_set_error(error, audio_output_quark(), 0,
"Unable to detect an audio device");
return NULL;
}
/**
* Determines the mixer type which should be used for the specified
* configuration block.
*
* This handles the deprecated options mixer_type (global) and
* mixer_enabled, if the mixer_type setting is not configured.
*/
static enum mixer_type
audio_output_mixer_type(const struct config_param *param)
{
/* read the local "mixer_type" setting */
const char *p = config_get_block_string(param, "mixer_type", NULL);
if (p != NULL)
return mixer_type_parse(p);
/* try the local "mixer_enabled" setting next (deprecated) */
if (!config_get_block_bool(param, "mixer_enabled", true))
return MIXER_TYPE_NONE;
/* fall back to the global "mixer_type" setting (also
deprecated) */
return mixer_type_parse(config_get_string("mixer_type", "hardware"));
}
static struct mixer *
audio_output_load_mixer(void *ao, const struct config_param *param,
const struct mixer_plugin *plugin,
struct filter *filter_chain,
GError **error_r)
{
struct mixer *mixer;
switch (audio_output_mixer_type(param)) {
case MIXER_TYPE_NONE:
case MIXER_TYPE_UNKNOWN:
return NULL;
case MIXER_TYPE_HARDWARE:
if (plugin == NULL)
return NULL;
return mixer_new(plugin, ao, param, error_r);
case MIXER_TYPE_SOFTWARE:
mixer = mixer_new(&software_mixer_plugin, NULL, NULL, NULL);
assert(mixer != NULL);
filter_chain_append(filter_chain,
software_mixer_get_filter(mixer));
return mixer;
}
assert(false);
return NULL;
}
bool
audio_output_init(struct audio_output *ao, const struct config_param *param,
GError **error_r)
{
const struct audio_output_plugin *plugin = NULL;
GError *error = NULL;
if (param) {
const char *p;
p = config_get_block_string(param, AUDIO_OUTPUT_TYPE, NULL);
if (p == NULL) {
g_set_error(error_r, audio_output_quark(), 0,
"Missing \"type\" configuration");
return false;
}
plugin = audio_output_plugin_get(p);
if (plugin == NULL) {
g_set_error(error_r, audio_output_quark(), 0,
"No such audio output plugin: %s", p);
return false;
}
ao->name = config_get_block_string(param, AUDIO_OUTPUT_NAME,
NULL);
if (ao->name == NULL) {
g_set_error(error_r, audio_output_quark(), 0,
"Missing \"name\" configuration");
return false;
}
p = config_get_block_string(param, AUDIO_OUTPUT_FORMAT,
NULL);
if (p != NULL) {
bool success =
audio_format_parse(&ao->config_audio_format,
p, true, error_r);
if (!success)
return false;
} else
audio_format_clear(&ao->config_audio_format);
} else {
g_warning("No \"%s\" defined in config file\n",
CONF_AUDIO_OUTPUT);
plugin = audio_output_detect(error_r);
if (plugin == NULL)
return false;
g_message("Successfully detected a %s audio device",
plugin->name);
ao->name = "default detected output";
audio_format_clear(&ao->config_audio_format);
}
ao->plugin = plugin;
ao->enabled = config_get_block_bool(param, "enabled", true);
ao->really_enabled = false;
ao->open = false;
ao->pause = false;
ao->fail_timer = NULL;
/* set up the filter chain */
ao->filter = filter_chain_new();
assert(ao->filter != NULL);
if (config_get_bool(CONF_VOLUME_NORMALIZATION, false)) {
struct filter *normalize_filter =
filter_new(&normalize_filter_plugin, NULL, NULL);
assert(normalize_filter != NULL);
filter_chain_append(ao->filter,
autoconvert_filter_new(normalize_filter));
}
filter_chain_parse(ao->filter,
config_get_block_string(param, AUDIO_FILTERS, ""),
&error
);
// It's not really fatal - Part of the filter chain has been set up already
// and even an empty one will work (if only with unexpected behaviour)
if (error != NULL) {
g_warning("Failed to initialize filter chain for '%s': %s",
ao->name, error->message);
g_error_free(error);
}
ao->thread = NULL;
ao->command = AO_COMMAND_NONE;
ao->mutex = g_mutex_new();
ao->cond = g_cond_new();
ao->data = ao_plugin_init(plugin,
&ao->config_audio_format,
param, error_r);
if (ao->data == NULL)
return false;
ao->mixer = audio_output_load_mixer(ao->data, param,
plugin->mixer_plugin,
ao->filter, &error);
if (ao->mixer == NULL && error != NULL) {
g_warning("Failed to initialize hardware mixer for '%s': %s",
ao->name, error->message);
g_error_free(error);
}
/* the "convert" filter must be the last one in the chain */
ao->convert_filter = filter_new(&convert_filter_plugin, NULL, NULL);
assert(ao->convert_filter != NULL);
filter_chain_append(ao->filter, ao->convert_filter);
/* done */
return true;
}
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