328 lines
8.5 KiB
C++
328 lines
8.5 KiB
C++
/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "Internal.hxx"
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#include "Registry.hxx"
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#include "Domain.hxx"
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#include "OutputAPI.hxx"
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#include "filter/FilterConfig.hxx"
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#include "AudioParser.hxx"
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#include "mixer/MixerList.hxx"
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#include "mixer/MixerType.hxx"
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#include "mixer/MixerControl.hxx"
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#include "mixer/plugins/SoftwareMixerPlugin.hxx"
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#include "filter/FilterPlugin.hxx"
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#include "filter/FilterRegistry.hxx"
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#include "filter/plugins/AutoConvertFilterPlugin.hxx"
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#include "filter/plugins/ReplayGainFilterPlugin.hxx"
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#include "filter/plugins/ChainFilterPlugin.hxx"
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#include "config/ConfigError.hxx"
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#include "config/ConfigGlobal.hxx"
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#include "util/Error.hxx"
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#include "Log.hxx"
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#include <assert.h>
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#include <string.h>
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#define AUDIO_OUTPUT_TYPE "type"
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#define AUDIO_OUTPUT_NAME "name"
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#define AUDIO_OUTPUT_FORMAT "format"
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#define AUDIO_FILTERS "filters"
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AudioOutput::AudioOutput(const AudioOutputPlugin &_plugin)
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:plugin(_plugin),
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enabled(true), really_enabled(false),
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open(false),
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pause(false),
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allow_play(true),
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in_playback_loop(false),
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woken_for_play(false),
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filter(nullptr),
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replay_gain_filter(nullptr),
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other_replay_gain_filter(nullptr),
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command(AO_COMMAND_NONE)
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{
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assert(plugin.finish != nullptr);
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assert(plugin.open != nullptr);
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assert(plugin.close != nullptr);
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assert(plugin.play != nullptr);
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}
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static const AudioOutputPlugin *
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audio_output_detect(Error &error)
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{
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LogDefault(output_domain, "Attempt to detect audio output device");
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audio_output_plugins_for_each(plugin) {
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if (plugin->test_default_device == nullptr)
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continue;
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FormatDefault(output_domain,
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"Attempting to detect a %s audio device",
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plugin->name);
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if (ao_plugin_test_default_device(plugin))
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return plugin;
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}
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error.Set(output_domain, "Unable to detect an audio device");
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return nullptr;
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}
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/**
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* Determines the mixer type which should be used for the specified
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* configuration block.
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*
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* This handles the deprecated options mixer_type (global) and
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* mixer_enabled, if the mixer_type setting is not configured.
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*/
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gcc_pure
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static enum mixer_type
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audio_output_mixer_type(const config_param ¶m)
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{
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/* read the local "mixer_type" setting */
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const char *p = param.GetBlockValue("mixer_type");
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if (p != nullptr)
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return mixer_type_parse(p);
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/* try the local "mixer_enabled" setting next (deprecated) */
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if (!param.GetBlockValue("mixer_enabled", true))
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return MIXER_TYPE_NONE;
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/* fall back to the global "mixer_type" setting (also
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deprecated) */
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return mixer_type_parse(config_get_string(CONF_MIXER_TYPE,
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"hardware"));
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}
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static Mixer *
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audio_output_load_mixer(EventLoop &event_loop, AudioOutput *ao,
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const config_param ¶m,
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const struct mixer_plugin *plugin,
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Filter &filter_chain,
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Error &error)
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{
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Mixer *mixer;
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switch (audio_output_mixer_type(param)) {
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case MIXER_TYPE_NONE:
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case MIXER_TYPE_UNKNOWN:
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return nullptr;
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case MIXER_TYPE_HARDWARE:
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if (plugin == nullptr)
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return nullptr;
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return mixer_new(event_loop, plugin, ao, param, error);
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case MIXER_TYPE_SOFTWARE:
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mixer = mixer_new(event_loop, &software_mixer_plugin, nullptr,
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config_param(),
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IgnoreError());
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assert(mixer != nullptr);
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filter_chain_append(filter_chain, "software_mixer",
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software_mixer_get_filter(mixer));
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return mixer;
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}
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assert(false);
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gcc_unreachable();
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}
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bool
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AudioOutput::Configure(const config_param ¶m, Error &error)
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{
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if (!param.IsNull()) {
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name = param.GetBlockValue(AUDIO_OUTPUT_NAME);
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if (name == nullptr) {
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error.Set(config_domain,
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"Missing \"name\" configuration");
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return false;
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}
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const char *p = param.GetBlockValue(AUDIO_OUTPUT_FORMAT);
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if (p != nullptr) {
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bool success =
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audio_format_parse(config_audio_format,
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p, true, error);
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if (!success)
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return false;
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} else
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config_audio_format.Clear();
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} else {
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name = "default detected output";
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config_audio_format.Clear();
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}
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tags = param.GetBlockValue("tags", true);
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always_on = param.GetBlockValue("always_on", false);
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enabled = param.GetBlockValue("enabled", true);
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/* set up the filter chain */
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filter = filter_chain_new();
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assert(filter != nullptr);
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/* create the normalization filter (if configured) */
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if (config_get_bool(CONF_VOLUME_NORMALIZATION, false)) {
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Filter *normalize_filter =
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filter_new(&normalize_filter_plugin, config_param(),
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IgnoreError());
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assert(normalize_filter != nullptr);
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filter_chain_append(*filter, "normalize",
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autoconvert_filter_new(normalize_filter));
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}
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Error filter_error;
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filter_chain_parse(*filter,
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param.GetBlockValue(AUDIO_FILTERS, ""),
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filter_error);
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// It's not really fatal - Part of the filter chain has been set up already
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// and even an empty one will work (if only with unexpected behaviour)
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if (filter_error.IsDefined())
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FormatError(filter_error,
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"Failed to initialize filter chain for '%s'",
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name);
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/* done */
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return true;
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}
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static bool
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audio_output_setup(EventLoop &event_loop, AudioOutput *ao,
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const config_param ¶m,
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Error &error)
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{
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/* create the replay_gain filter */
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const char *replay_gain_handler =
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param.GetBlockValue("replay_gain_handler", "software");
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if (strcmp(replay_gain_handler, "none") != 0) {
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ao->replay_gain_filter = filter_new(&replay_gain_filter_plugin,
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param, IgnoreError());
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assert(ao->replay_gain_filter != nullptr);
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ao->replay_gain_serial = 0;
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ao->other_replay_gain_filter = filter_new(&replay_gain_filter_plugin,
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param,
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IgnoreError());
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assert(ao->other_replay_gain_filter != nullptr);
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ao->other_replay_gain_serial = 0;
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} else {
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ao->replay_gain_filter = nullptr;
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ao->other_replay_gain_filter = nullptr;
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}
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/* set up the mixer */
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Error mixer_error;
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ao->mixer = audio_output_load_mixer(event_loop, ao, param,
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ao->plugin.mixer_plugin,
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*ao->filter, mixer_error);
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if (ao->mixer == nullptr && mixer_error.IsDefined())
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FormatError(mixer_error,
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"Failed to initialize hardware mixer for '%s'",
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ao->name);
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/* use the hardware mixer for replay gain? */
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if (strcmp(replay_gain_handler, "mixer") == 0) {
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if (ao->mixer != nullptr)
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replay_gain_filter_set_mixer(ao->replay_gain_filter,
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ao->mixer, 100);
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else
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FormatError(output_domain,
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"No such mixer for output '%s'", ao->name);
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} else if (strcmp(replay_gain_handler, "software") != 0 &&
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ao->replay_gain_filter != nullptr) {
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error.Set(config_domain,
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"Invalid \"replay_gain_handler\" value");
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return false;
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}
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/* the "convert" filter must be the last one in the chain */
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ao->convert_filter = filter_new(&convert_filter_plugin, config_param(),
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IgnoreError());
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assert(ao->convert_filter != nullptr);
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filter_chain_append(*ao->filter, "convert", ao->convert_filter);
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return true;
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}
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AudioOutput *
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audio_output_new(EventLoop &event_loop, const config_param ¶m,
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PlayerControl &pc,
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Error &error)
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{
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const AudioOutputPlugin *plugin;
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if (!param.IsNull()) {
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const char *p;
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p = param.GetBlockValue(AUDIO_OUTPUT_TYPE);
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if (p == nullptr) {
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error.Set(config_domain,
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"Missing \"type\" configuration");
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return nullptr;
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}
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plugin = AudioOutputPlugin_get(p);
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if (plugin == nullptr) {
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error.Format(config_domain,
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"No such audio output plugin: %s", p);
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return nullptr;
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}
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} else {
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LogWarning(output_domain,
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"No 'AudioOutput' defined in config file");
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plugin = audio_output_detect(error);
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if (plugin == nullptr)
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return nullptr;
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FormatDefault(output_domain,
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"Successfully detected a %s audio device",
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plugin->name);
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}
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AudioOutput *ao = ao_plugin_init(plugin, param, error);
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if (ao == nullptr)
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return nullptr;
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if (!audio_output_setup(event_loop, ao, param, error)) {
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ao_plugin_finish(ao);
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return nullptr;
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}
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ao->player_control = &pc;
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return ao;
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}
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