/* * Copyright 2003-2017 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 "Filtered.hxx" #include "Registry.hxx" #include "Domain.hxx" #include "OutputAPI.hxx" #include "AudioParser.hxx" #include "mixer/MixerList.hxx" #include "mixer/MixerType.hxx" #include "mixer/MixerControl.hxx" #include "mixer/plugins/SoftwareMixerPlugin.hxx" #include "filter/LoadChain.hxx" #include "filter/Prepared.hxx" #include "filter/plugins/AutoConvertFilterPlugin.hxx" #include "filter/plugins/ConvertFilterPlugin.hxx" #include "filter/plugins/ReplayGainFilterPlugin.hxx" #include "filter/plugins/ChainFilterPlugin.hxx" #include "filter/plugins/VolumeFilterPlugin.hxx" #include "filter/plugins/NormalizeFilterPlugin.hxx" #include "config/ConfigError.hxx" #include "config/ConfigGlobal.hxx" #include "config/Block.hxx" #include "util/RuntimeError.hxx" #include "util/StringFormat.hxx" #include "Log.hxx" #include #include #include #define AUDIO_OUTPUT_TYPE "type" #define AUDIO_OUTPUT_NAME "name" #define AUDIO_OUTPUT_FORMAT "format" #define AUDIO_FILTERS "filters" FilteredAudioOutput::FilteredAudioOutput(const char *_plugin_name, std::unique_ptr &&_output, const ConfigBlock &block) :plugin_name(_plugin_name), output(std::move(_output)) { Configure(block); } static const AudioOutputPlugin * audio_output_detect() { LogDefault(output_domain, "Attempt to detect audio output device"); audio_output_plugins_for_each(plugin) { if (plugin->test_default_device == nullptr) continue; FormatDefault(output_domain, "Attempting to detect a %s audio device", plugin->name); if (ao_plugin_test_default_device(plugin)) return plugin; } throw std::runtime_error("Unable to detect an audio device"); } /** * 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 MixerType audio_output_mixer_type(const ConfigBlock &block) noexcept { /* read the local "mixer_type" setting */ const char *p = block.GetBlockValue("mixer_type"); if (p != nullptr) return mixer_type_parse(p); /* try the local "mixer_enabled" setting next (deprecated) */ if (!block.GetBlockValue("mixer_enabled", true)) return MixerType::NONE; /* fall back to the global "mixer_type" setting (also deprecated) */ return mixer_type_parse(config_get_string(ConfigOption::MIXER_TYPE, "hardware")); } static Mixer * audio_output_load_mixer(EventLoop &event_loop, FilteredAudioOutput &ao, const ConfigBlock &block, const MixerPlugin *plugin, PreparedFilter &filter_chain, MixerListener &listener) { Mixer *mixer; switch (audio_output_mixer_type(block)) { case MixerType::NONE: case MixerType::UNKNOWN: return nullptr; case MixerType::NULL_: return mixer_new(event_loop, null_mixer_plugin, *ao.output, listener, block); case MixerType::HARDWARE: if (plugin == nullptr) return nullptr; return mixer_new(event_loop, *plugin, *ao.output, listener, block); case MixerType::SOFTWARE: mixer = mixer_new(event_loop, software_mixer_plugin, *ao.output, listener, ConfigBlock()); assert(mixer != nullptr); filter_chain_append(filter_chain, "software_mixer", ao.volume_filter.Set(volume_filter_prepare())); return mixer; } assert(false); gcc_unreachable(); } void FilteredAudioOutput::Configure(const ConfigBlock &block) { if (!block.IsNull()) { name = block.GetBlockValue(AUDIO_OUTPUT_NAME); if (name == nullptr) throw std::runtime_error("Missing \"name\" configuration"); const char *p = block.GetBlockValue(AUDIO_OUTPUT_FORMAT); if (p != nullptr) config_audio_format = ParseAudioFormat(p, true); else config_audio_format.Clear(); } else { name = "default detected output"; config_audio_format.Clear(); } log_name = StringFormat<256>("\"%s\" (%s)", name, plugin_name); /* set up the filter chain */ prepared_filter = filter_chain_new(); assert(prepared_filter != nullptr); /* create the normalization filter (if configured) */ if (config_get_bool(ConfigOption::VOLUME_NORMALIZATION, false)) { filter_chain_append(*prepared_filter, "normalize", autoconvert_filter_new(normalize_filter_prepare())); } try { filter_chain_parse(*prepared_filter, block.GetBlockValue(AUDIO_FILTERS, "")); } catch (...) { /* 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) */ FormatError(std::current_exception(), "Failed to initialize filter chain for '%s'", name); } } inline void FilteredAudioOutput::Setup(EventLoop &event_loop, const ReplayGainConfig &replay_gain_config, const MixerPlugin *mixer_plugin, MixerListener &mixer_listener, const ConfigBlock &block) { if (output->GetNeedFullyDefinedAudioFormat() && !config_audio_format.IsFullyDefined()) throw std::runtime_error("Need full audio format specification"); /* create the replay_gain filter */ const char *replay_gain_handler = block.GetBlockValue("replay_gain_handler", "software"); if (strcmp(replay_gain_handler, "none") != 0) { prepared_replay_gain_filter = NewReplayGainFilter(replay_gain_config); assert(prepared_replay_gain_filter != nullptr); prepared_other_replay_gain_filter = NewReplayGainFilter(replay_gain_config); assert(prepared_other_replay_gain_filter != nullptr); } /* set up the mixer */ try { mixer = audio_output_load_mixer(event_loop, *this, block, mixer_plugin, *prepared_filter, mixer_listener); } catch (...) { FormatError(std::current_exception(), "Failed to initialize hardware mixer for '%s'", name); } /* use the hardware mixer for replay gain? */ if (strcmp(replay_gain_handler, "mixer") == 0) { if (mixer != nullptr) replay_gain_filter_set_mixer(*prepared_replay_gain_filter, mixer, 100); else FormatError(output_domain, "No such mixer for output '%s'", name); } else if (strcmp(replay_gain_handler, "software") != 0 && prepared_replay_gain_filter != nullptr) { throw std::runtime_error("Invalid \"replay_gain_handler\" value"); } /* the "convert" filter must be the last one in the chain */ filter_chain_append(*prepared_filter, "convert", convert_filter.Set(convert_filter_prepare())); } std::unique_ptr audio_output_new(EventLoop &event_loop, const ReplayGainConfig &replay_gain_config, const ConfigBlock &block, MixerListener &mixer_listener) { const AudioOutputPlugin *plugin; if (!block.IsNull()) { const char *p; p = block.GetBlockValue(AUDIO_OUTPUT_TYPE); if (p == nullptr) throw std::runtime_error("Missing \"type\" configuration"); plugin = AudioOutputPlugin_get(p); if (plugin == nullptr) throw FormatRuntimeError("No such audio output plugin: %s", p); } else { LogWarning(output_domain, "No 'audio_output' defined in config file"); plugin = audio_output_detect(); FormatDefault(output_domain, "Successfully detected a %s audio device", plugin->name); } std::unique_ptr ao(ao_plugin_init(event_loop, *plugin, block)); assert(ao != nullptr); auto f = std::make_unique(plugin->name, std::move(ao), block); f->Setup(event_loop, replay_gain_config, plugin->mixer_plugin, mixer_listener, block); return f; }