/* * Copyright (C) 2003-2009 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. */ #ifndef MPD_OUTPUT_INTERNAL_H #define MPD_OUTPUT_INTERNAL_H #include "audio_format.h" #include "pcm_convert.h" #include "notify.h" #include <time.h> enum audio_output_command { AO_COMMAND_NONE = 0, AO_COMMAND_OPEN, AO_COMMAND_CLOSE, AO_COMMAND_PAUSE, AO_COMMAND_CANCEL, AO_COMMAND_KILL }; struct audio_output { /** * The device's configured display name. */ const char *name; /** * The plugin which implements this output device. */ const struct audio_output_plugin *plugin; /** * The plugin's internal data. It is passed to every plugin * method. */ void *data; /** * The #mixer object associated with this audio output device. * May be NULL if none is available, or if software volume is * configured. */ struct mixer *mixer; /** * This flag is true, when the audio_format of this device is * configured in mpd.conf. */ bool config_audio_format; /** * Has the user enabled this device? */ bool enabled; /** * Is the device (already) open and functional? * * This attribute may only be modified by the output thread. * It is protected with #mutex: write accesses inside the * output thread and read accesses outside of it may only be * performed while the lock is held. */ bool open; /** * Is the device paused? i.e. the output thread is in the * ao_pause() loop. */ bool pause; /** * If not NULL, the device has failed, and this timer is used * to estimate how long it should stay disabled (unless * explicitly reopened with "play"). */ GTimer *fail_timer; /** * The audio_format in which audio data is received from the * player thread (which in turn receives it from the decoder). */ struct audio_format in_audio_format; /** * The audio_format which is really sent to the device. This * is basically config_audio_format (if configured) or * in_audio_format, but may have been modified by * plugin->open(). */ struct audio_format out_audio_format; struct pcm_convert_state convert_state; /** * The thread handle, or NULL if the output thread isn't * running. */ GThread *thread; /** * Notify object for the thread. */ struct notify notify; /** * The next command to be performed by the output thread. */ enum audio_output_command command; /** * The music pipe which provides music chunks to be played. */ const struct music_pipe *pipe; /** * This mutex protects #open, #chunk and #chunk_finished. */ GMutex *mutex; /** * The #music_chunk which is currently being played. All * chunks before this one may be returned to the * #music_buffer, because they are not going to be used by * this output anymore. */ const struct music_chunk *chunk; /** * Has the output finished playing #chunk? */ bool chunk_finished; }; /** * Notify object used by the thread's client, i.e. we will send a * notify signal to this object, expecting the caller to wait on it. */ extern struct notify audio_output_client_notify; static inline bool audio_output_is_open(const struct audio_output *ao) { return ao->open; } static inline bool audio_output_command_is_finished(const struct audio_output *ao) { return ao->command == AO_COMMAND_NONE; } #endif