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Diffstat (limited to 'src/OutputInit.cxx')
| -rw-r--r-- | src/OutputInit.cxx | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/src/OutputInit.cxx b/src/OutputInit.cxx new file mode 100644 index 000000000..5fc800d19 --- /dev/null +++ b/src/OutputInit.cxx @@ -0,0 +1,336 @@ +/* + * 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 "OutputControl.hxx" +#include "OutputList.hxx" + +extern "C" { +#include "output_api.h" +#include "output_internal.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 "filter/replay_gain_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) +{ + g_warning("Attempt to detect audio output device"); + + audio_output_plugins_for_each(plugin) { + 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(struct audio_output *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 +ao_base_init(struct audio_output *ao, + const struct audio_output_plugin *plugin, + const struct config_param *param, GError **error_r) +{ + assert(ao != NULL); + assert(plugin != NULL); + assert(plugin->finish != NULL); + assert(plugin->open != NULL); + assert(plugin->close != NULL); + assert(plugin->play != NULL); + + GError *error = NULL; + + if (param) { + const char *p; + + 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 { + ao->name = "default detected output"; + + audio_format_clear(&ao->config_audio_format); + } + + ao->plugin = plugin; + ao->tags = config_get_block_bool(param, "tags", true); + ao->always_on = config_get_block_bool(param, "always_on", false); + ao->enabled = config_get_block_bool(param, "enabled", true); + ao->really_enabled = false; + ao->open = false; + ao->pause = false; + ao->allow_play = true; + ao->fail_timer = NULL; + + pcm_buffer_init(&ao->cross_fade_buffer); + + /* 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)) { + 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->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 struct config_param *param, + GError **error_r) +{ + + /* create the replay_gain filter */ + + const char *replay_gain_handler = + config_get_block_string(param, "replay_gain_handler", + "software"); + + if (strcmp(replay_gain_handler, "none") != 0) { + ao->replay_gain_filter = filter_new(&replay_gain_filter_plugin, + param, NULL); + assert(ao->replay_gain_filter != NULL); + + ao->replay_gain_serial = 0; + + ao->other_replay_gain_filter = filter_new(&replay_gain_filter_plugin, + param, NULL); + 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 */ + + GError *error = NULL; + ao->mixer = audio_output_load_mixer(ao, param, + ao->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); + } + + /* 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 + g_warning("No such mixer for output '%s'", ao->name); + } else if (strcmp(replay_gain_handler, "software") != 0 && + ao->replay_gain_filter != NULL) { + g_set_error(error_r, audio_output_quark(), 0, + "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, NULL, NULL); + assert(ao->convert_filter != NULL); + + filter_chain_append(ao->filter, ao->convert_filter); + + return true; +} + +struct audio_output * +audio_output_new(const struct config_param *param, + struct player_control *pc, + GError **error_r) +{ + const struct audio_output_plugin *plugin; + + 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 nullptr; + } + + 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 nullptr; + } + } else { + g_warning("No \"%s\" defined in config file\n", + CONF_AUDIO_OUTPUT); + + plugin = audio_output_detect(error_r); + if (plugin == NULL) + return nullptr; + + g_message("Successfully detected a %s audio device", + plugin->name); + } + + struct audio_output *ao = ao_plugin_init(plugin, param, error_r); + if (ao == NULL) + return NULL; + + if (!audio_output_setup(ao, param, error_r)) { + ao_plugin_finish(ao); + return NULL; + } + + ao->player_control = pc; + return ao; +} |