/* 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 MPD_DECODER_CONTROL_H #define MPD_DECODER_CONTROL_H #include "decoder_command.h" #include "audio_format.h" #include "notify.h" #include <assert.h> #define DECODE_TYPE_FILE 0 #define DECODE_TYPE_URL 1 enum decoder_state { DECODE_STATE_STOP = 0, DECODE_STATE_START, DECODE_STATE_DECODE, /** * The last "START" command failed, because there was an I/O * error or because no decoder was able to decode the file. * This state will only come after START; once the state has * turned to DECODE, by definition no such error can occur. */ DECODE_STATE_ERROR, }; struct decoder_control { /** the handle of the decoder thread, or NULL if the decoder thread isn't running */ GThread *thread; struct notify notify; volatile enum decoder_state state; volatile enum decoder_command command; bool quit; bool seek_error; bool seekable; volatile double seek_where; /** the format of the song file */ struct audio_format in_audio_format; /** the format being sent to the music pipe */ struct audio_format out_audio_format; struct song *current_song; struct song *next_song; float total_time; }; extern struct decoder_control dc; void dc_init(void); void dc_deinit(void); static inline bool decoder_is_idle(void) { return (dc.state == DECODE_STATE_STOP || dc.state == DECODE_STATE_ERROR) && dc.command != DECODE_COMMAND_START; } static inline bool decoder_is_starting(void) { return dc.command == DECODE_COMMAND_START || dc.state == DECODE_STATE_START; } static inline bool decoder_has_failed(void) { assert(dc.command == DECODE_COMMAND_NONE); return dc.state == DECODE_STATE_ERROR; } static inline struct song * decoder_current_song(void) { switch (dc.state) { case DECODE_STATE_STOP: case DECODE_STATE_ERROR: return NULL; case DECODE_STATE_START: case DECODE_STATE_DECODE: return dc.current_song; } assert(false); return NULL; } void dc_command_wait(struct notify *notify); void dc_start(struct notify *notify, struct song *song); void dc_start_async(struct song *song); void dc_stop(struct notify *notify); bool dc_seek(struct notify *notify, double where); void dc_quit(void); #endif