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/*
* Copyright (C) 2003-2013 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 "OutputInternal.hxx"
#include "OutputControl.hxx"
#include "OutputList.hxx"
#include "OutputError.hxx"
#include "OutputAPI.hxx"
#include "FilterConfig.hxx"
#include "AudioParser.hxx"
#include "MixerList.hxx"
#include "MixerType.hxx"
#include "MixerControl.hxx"
#include "mixer/SoftwareMixerPlugin.hxx"
#include "FilterPlugin.hxx"
#include "FilterRegistry.hxx"
#include "filter/AutoConvertFilterPlugin.hxx"
#include "filter/ReplayGainFilterPlugin.hxx"
#include "filter/ChainFilterPlugin.hxx"
#include "ConfigError.hxx"
#include "ConfigGlobal.hxx"
#include "util/Error.hxx"
#include "Log.hxx"
#include <assert.h>
#include <string.h>
#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(Error &error)
{
LogInfo(output_domain, "Attempt to detect audio output device");
audio_output_plugins_for_each(plugin) {
if (plugin->test_default_device == NULL)
continue;
FormatInfo(output_domain,
"Attempting to detect a %s audio device",
plugin->name);
if (ao_plugin_test_default_device(plugin))
return plugin;
}
error.Set(output_domain, "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.
*/
gcc_pure
static enum mixer_type
audio_output_mixer_type(const config_param ¶m)
{
/* read the local "mixer_type" setting */
const char *p = param.GetBlockValue("mixer_type");
if (p != NULL)
return mixer_type_parse(p);
/* try the local "mixer_enabled" setting next (deprecated) */
if (!param.GetBlockValue("mixer_enabled", true))
return MIXER_TYPE_NONE;
/* fall back to the global "mixer_type" setting (also
deprecated) */
return mixer_type_parse(config_get_string(CONF_MIXER_TYPE,
"hardware"));
}
static Mixer *
audio_output_load_mixer(struct audio_output *ao,
const config_param ¶m,
const struct mixer_plugin *plugin,
Filter &filter_chain,
Error &error)
{
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);
case MIXER_TYPE_SOFTWARE:
mixer = mixer_new(&software_mixer_plugin, nullptr,
config_param(),
IgnoreError());
assert(mixer != NULL);
filter_chain_append(filter_chain, "software_mixer",
software_mixer_get_filter(mixer));
return mixer;
}
assert(false);
gcc_unreachable();
}
bool
ao_base_init(struct audio_output *ao,
const struct audio_output_plugin *plugin,
const config_param ¶m, Error &error)
{
assert(ao != NULL);
assert(plugin != NULL);
assert(plugin->finish != NULL);
assert(plugin->open != NULL);
assert(plugin->close != NULL);
assert(plugin->play != NULL);
if (!param.IsNull()) {
ao->name = param.GetBlockValue(AUDIO_OUTPUT_NAME);
if (ao->name == NULL) {
error.Set(config_domain,
"Missing \"name\" configuration");
return false;
}
const char *p = param.GetBlockValue(AUDIO_OUTPUT_FORMAT);
if (p != NULL) {
bool success =
audio_format_parse(ao->config_audio_format,
p, true, error);
if (!success)
return false;
} else
ao->config_audio_format.Clear();
} else {
ao->name = "default detected output";
ao->config_audio_format.Clear();
}
ao->plugin = plugin;
ao->tags = param.GetBlockValue("tags", true);
ao->always_on = param.GetBlockValue("always_on", false);
ao->enabled = param.GetBlockValue("enabled", true);
ao->really_enabled = false;
ao->open = false;
ao->pause = false;
ao->allow_play = true;
ao->fail_timer = NULL;
/* set up the filter chain */
ao->filter = filter_chain_new();
assert(ao->filter != NULL);
/* create the normalization filter (if configured) */
if (config_get_bool(CONF_VOLUME_NORMALIZATION, false)) {
Filter *normalize_filter =
filter_new(&normalize_filter_plugin, config_param(),
IgnoreError());
assert(normalize_filter != NULL);
filter_chain_append(*ao->filter, "normalize",
autoconvert_filter_new(normalize_filter));
}
Error filter_error;
filter_chain_parse(*ao->filter,
param.GetBlockValue(AUDIO_FILTERS, ""),
filter_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 (filter_error.IsDefined())
FormatError(filter_error,
"Failed to initialize filter chain for '%s'",
ao->name);
ao->thread = NULL;
ao->command = AO_COMMAND_NONE;
ao->mixer = NULL;
ao->replay_gain_filter = NULL;
ao->other_replay_gain_filter = NULL;
/* done */
return true;
}
static bool
audio_output_setup(struct audio_output *ao, const config_param ¶m,
Error &error)
{
/* create the replay_gain filter */
const char *replay_gain_handler =
param.GetBlockValue("replay_gain_handler", "software");
if (strcmp(replay_gain_handler, "none") != 0) {
ao->replay_gain_filter = filter_new(&replay_gain_filter_plugin,
param, IgnoreError());
assert(ao->replay_gain_filter != NULL);
ao->replay_gain_serial = 0;
ao->other_replay_gain_filter = filter_new(&replay_gain_filter_plugin,
param,
IgnoreError());
assert(ao->other_replay_gain_filter != NULL);
ao->other_replay_gain_serial = 0;
} else {
ao->replay_gain_filter = NULL;
ao->other_replay_gain_filter = NULL;
}
/* set up the mixer */
Error mixer_error;
ao->mixer = audio_output_load_mixer(ao, param,
ao->plugin->mixer_plugin,
*ao->filter, mixer_error);
if (ao->mixer == NULL && mixer_error.IsDefined())
FormatError(mixer_error,
"Failed to initialize hardware mixer for '%s'",
ao->name);
/* use the hardware mixer for replay gain? */
if (strcmp(replay_gain_handler, "mixer") == 0) {
if (ao->mixer != NULL)
replay_gain_filter_set_mixer(ao->replay_gain_filter,
ao->mixer, 100);
else
FormatError(output_domain,
"No such mixer for output '%s'", ao->name);
} else if (strcmp(replay_gain_handler, "software") != 0 &&
ao->replay_gain_filter != NULL) {
error.Set(config_domain,
"Invalid \"replay_gain_handler\" value");
return false;
}
/* the "convert" filter must be the last one in the chain */
ao->convert_filter = filter_new(&convert_filter_plugin, config_param(),
IgnoreError());
assert(ao->convert_filter != NULL);
filter_chain_append(*ao->filter, "convert", ao->convert_filter);
return true;
}
struct audio_output *
audio_output_new(const config_param ¶m,
struct player_control *pc,
Error &error)
{
const struct audio_output_plugin *plugin;
if (!param.IsNull()) {
const char *p;
p = param.GetBlockValue(AUDIO_OUTPUT_TYPE);
if (p == NULL) {
error.Set(config_domain,
"Missing \"type\" configuration");
return nullptr;
}
plugin = audio_output_plugin_get(p);
if (plugin == NULL) {
error.Format(config_domain,
"No such audio output plugin: %s", p);
return nullptr;
}
} else {
LogWarning(output_domain,
"No 'audio_output' defined in config file");
plugin = audio_output_detect(error);
if (plugin == NULL)
return nullptr;
FormatInfo(output_domain,
"Successfully detected a %s audio device",
plugin->name);
}
struct audio_output *ao = ao_plugin_init(plugin, param, error);
if (ao == NULL)
return NULL;
if (!audio_output_setup(ao, param, error)) {
ao_plugin_finish(ao);
return NULL;
}
ao->player_control = pc;
return ao;
}
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