3291666b57
Instead of passing individual buffers to audio_output_all_play(), pass music_chunk objects. Append all those chunks asynchronously to a music_pipe instance. All output threads may then read chunks from this pipe. This reduces MPD's internal latency by an order of magnitude.
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* This project's homepage is: 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "output_control.h"
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#include "output_api.h"
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#include "output_internal.h"
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#include "output_list.h"
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#include "audio_parser.h"
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#include <glib.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "output"
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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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static const struct audio_output_plugin *
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audio_output_detect(GError **error)
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{
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const struct audio_output_plugin *plugin;
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unsigned i;
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g_warning("Attempt to detect audio output device");
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audio_output_plugins_for_each(plugin, i) {
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if (plugin->test_default_device == NULL)
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continue;
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g_warning("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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g_set_error(error, audio_output_quark(), 0,
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"Unable to detect an audio device");
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return NULL;
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}
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bool
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audio_output_init(struct audio_output *ao, const struct config_param *param,
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GError **error)
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{
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const char *format;
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const struct audio_output_plugin *plugin = NULL;
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if (param) {
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const char *type = NULL;
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type = config_get_block_string(param, AUDIO_OUTPUT_TYPE, NULL);
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if (type == NULL) {
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g_set_error(error, audio_output_quark(), 0,
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"Missing \"type\" configuration");
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return false;
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}
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plugin = audio_output_plugin_get(type);
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if (plugin == NULL) {
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g_set_error(error, audio_output_quark(), 0,
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"No such audio output plugin: %s",
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type);
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return false;
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}
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ao->name = config_get_block_string(param, AUDIO_OUTPUT_NAME,
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NULL);
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if (ao->name == NULL) {
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g_set_error(error, audio_output_quark(), 0,
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"Missing \"name\" configuration");
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return false;
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}
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format = config_get_block_string(param, AUDIO_OUTPUT_FORMAT,
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NULL);
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} else {
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g_warning("No \"%s\" defined in config file\n",
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CONF_AUDIO_OUTPUT);
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plugin = audio_output_detect(error);
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if (plugin == NULL)
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return false;
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g_message("Successfully detected a %s audio device",
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plugin->name);
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ao->name = "default detected output";
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format = NULL;
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}
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ao->plugin = plugin;
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ao->enabled = config_get_block_bool(param, "enabled", true);
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ao->open = false;
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ao->fail_timer = NULL;
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pcm_convert_init(&ao->convert_state);
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if (format) {
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bool ret;
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ret = audio_format_parse(&ao->config_audio_format, format,
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error);
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if (!ret)
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return false;
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} else
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audio_format_clear(&ao->config_audio_format);
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ao->thread = NULL;
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notify_init(&ao->notify);
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ao->command = AO_COMMAND_NONE;
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ao->mutex = g_mutex_new();
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ao->data = ao_plugin_init(plugin,
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format ? &ao->config_audio_format : NULL,
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param, error);
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if (ao->data == NULL)
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return false;
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return true;
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}
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