/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * Copyright (C) 2008 Max Kellermann <max@duempel.org> * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef OUTPUT_INTERNAL_H #define OUTPUT_INTERNAL_H #include "pcm_utils.h" #include "notify.h" 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; /** * Is the device (already) open and functional? */ int open; /** * The audio_format in which audio data is received from the * player thread (which in turn receives it from the decoder). */ struct audio_format inAudioFormat; /** * The audio_format which is really sent to the device. This * is basically reqAudioFormat (if configured) or * inAudioFormat, but may have been modified by * plugin->open(). */ struct audio_format outAudioFormat; /** * The audio_format which was configured. Only set if * convertAudioFormat is true. */ struct audio_format reqAudioFormat; ConvState convState; char *convBuffer; size_t convBufferLen; /** * The thread handle, or "0" if the output thread isn't * running. */ pthread_t thread; /** * Notify object for the thread. */ struct notify notify; /** * The next command to be performed by the output thread. */ enum audio_output_command command; /** * Command arguments, depending on the command. */ union { struct { const char *data; size_t size; } play; const struct tag *tag; } args; /** * Result value of the command. Generally, "0" means success. */ int result; }; /** * 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 int audio_output_is_open(const struct audio_output *ao) { return ao->open; } static inline int audio_output_command_is_finished(const struct audio_output *ao) { return ao->command == AO_COMMAND_NONE; } static inline int audio_output_get_result(const struct audio_output *ao) { return ao->result; } #endif