21bb10f4bf
This patch introduces the mixer for the pulse output. Technically speaking, the pulse index is needed to get or set the volume. You must define callback fonctions to get this index since the pulse output in mpd is done using the simpe api. The pulse simple api does not provide the index of the newly defined output. So callback fonctions are associated to the pulse context. The list of all the sink input is then retreived. Then we select the name of the mpd pulse output and control its volume by its associated index number. Signed-off-by: Patrice Linel <patnathanael@gmail.com> Signed-off-by: David Guibert <david.guibert@gmail.com> [mk: fixed whitespace errors and broke long lines; removed daemonization changes from main.c]
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/*
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* Copyright (C) 2003-2009 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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* 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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#ifndef MPD_MIXER_H
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#define MPD_MIXER_H
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#include <stdbool.h>
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/*
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* list of currently implemented mixers
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*/
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extern const struct mixer_plugin alsa_mixer;
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extern const struct mixer_plugin oss_mixer;
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extern const struct mixer_plugin pulse_mixer;
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struct config_param;
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struct mixer_plugin {
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/**
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* Alocates and configures a mixer device.
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*/
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struct mixer *(*init)(const struct config_param *param);
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/**
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* Finish and free mixer data
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*/
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void (*finish)(struct mixer *data);
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/**
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* Open mixer device
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*/
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bool (*open)(struct mixer *data);
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/**
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* Close mixer device
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*/
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void (*close)(struct mixer *data);
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/**
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* Reads the current volume.
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*
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* @return the current volume (0..100 including) or -1 on
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* error
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*/
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int (*get_volume)(struct mixer *mixer);
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/**
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* Sets the volume.
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*
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* @param volume the new volume (0..100 including)
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* @return true on success
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*/
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bool (*set_volume)(struct mixer *mixer, unsigned volume);
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};
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struct mixer {
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const struct mixer_plugin *plugin;
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};
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static inline void
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mixer_init(struct mixer *mixer, const struct mixer_plugin *plugin)
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{
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mixer->plugin = plugin;
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}
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struct mixer *
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mixer_new(const struct mixer_plugin *plugin, const struct config_param *param);
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void
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mixer_free(struct mixer *mixer);
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bool mixer_open(struct mixer *mixer);
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void mixer_close(struct mixer *mixer);
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static inline int
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mixer_get_volume(struct mixer *mixer)
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{
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return mixer->plugin->get_volume(mixer);
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}
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static inline bool
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mixer_set_volume(struct mixer *mixer, unsigned volume)
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{
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return mixer->plugin->set_volume(mixer, volume);
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}
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void mixer_disable_all(void);
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#endif
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