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/*
* 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_PLAYER_H
#define MPD_PLAYER_H
#include "notify.h"
#include "audio_format.h"
#include <stdint.h>
enum player_state {
PLAYER_STATE_STOP = 0,
PLAYER_STATE_PAUSE,
PLAYER_STATE_PLAY
};
enum player_command {
PLAYER_COMMAND_NONE = 0,
PLAYER_COMMAND_EXIT,
PLAYER_COMMAND_STOP,
PLAYER_COMMAND_PAUSE,
PLAYER_COMMAND_SEEK,
PLAYER_COMMAND_CLOSE_AUDIO,
/**
* At least one audio_output.enabled flag has been modified;
* commit those changes to the output threads.
*/
PLAYER_COMMAND_UPDATE_AUDIO,
/** player_control.next_song has been updated */
PLAYER_COMMAND_QUEUE,
/**
* cancel pre-decoding player_control.next_song; if the player
* has already started playing this song, it will completely
* stop
*/
PLAYER_COMMAND_CANCEL,
/**
* Refresh status information in the #player_control struct,
* e.g. elapsed_time.
*/
PLAYER_COMMAND_REFRESH,
};
enum player_error {
PLAYER_ERROR_NOERROR = 0,
PLAYER_ERROR_FILE,
PLAYER_ERROR_AUDIO,
PLAYER_ERROR_SYSTEM,
PLAYER_ERROR_UNKTYPE,
PLAYER_ERROR_FILENOTFOUND,
};
struct player_status {
enum player_state state;
uint16_t bit_rate;
struct audio_format audio_format;
float total_time;
float elapsed_time;
};
struct player_control {
unsigned buffer_chunks;
unsigned int buffered_before_play;
/** the handle of the player thread, or NULL if the player
thread isn't running */
GThread *thread;
/**
* This lock protects #command, #state, #error.
*/
GMutex *mutex;
/**
* Trigger this object after you have modified #command.
*/
GCond *cond;
enum player_command command;
enum player_state state;
enum player_error error;
uint16_t bit_rate;
struct audio_format audio_format;
float total_time;
float elapsed_time;
struct song *volatile next_song;
struct song *errored_song;
volatile double seek_where;
float cross_fade_seconds;
double total_play_time;
};
extern struct player_control pc;
void pc_init(unsigned buffer_chunks, unsigned buffered_before_play);
void pc_deinit(void);
/**
* Locks the #player_control object.
*/
static inline void
player_lock(void)
{
g_mutex_lock(pc.mutex);
}
/**
* Unlocks the #player_control object.
*/
static inline void
player_unlock(void)
{
g_mutex_unlock(pc.mutex);
}
/**
* Waits for a signal on the #player_control object. This function is
* only valid in the player thread. The object must be locked prior
* to calling this function.
*/
static inline void
player_wait(void)
{
g_cond_wait(pc.cond, pc.mutex);
}
/**
* Waits for a signal on the #player_control object. This function is
* only valid in the player thread. The #decoder_control object must
* be locked prior to calling this function.
*
* Note the small difference to the player_wait() function!
*/
void
player_wait_decoder(void);
/**
* Signals the #player_control object. The object should be locked
* prior to calling this function.
*/
static inline void
player_signal(void)
{
g_cond_signal(pc.cond);
}
/**
* Signals the #player_control object. The object is temporarily
* locked by this function.
*/
static inline void
player_lock_signal(void)
{
player_lock();
player_signal();
player_unlock();
}
/**
* Call this function when the specified song pointer is about to be
* invalidated. This makes sure that player_control.errored_song does
* not point to an invalid pointer.
*/
void
pc_song_deleted(const struct song *song);
void
pc_play(struct song *song);
/**
* see PLAYER_COMMAND_CANCEL
*/
void pc_cancel(void);
void
pc_set_pause(bool pause_flag);
void
pc_pause(void);
void
pc_kill(void);
void
pc_get_status(struct player_status *status);
enum player_state
pc_get_state(void);
void
pc_clear_error(void);
/**
* Returns the human-readable message describing the last error during
* playback, NULL if no error occurred. The caller has to free the
* returned string.
*/
char *
pc_get_error_message(void);
enum player_error
pc_get_error(void);
void
pc_stop(void);
void
pc_update_audio(void);
void
pc_enqueue_song(struct song *song);
/**
* Makes the player thread seek the specified song to a position.
*
* @return true on success, false on failure (e.g. if MPD isn't
* playing currently)
*/
bool
pc_seek(struct song *song, float seek_time);
void
pc_set_cross_fade(float cross_fade_seconds);
float
pc_get_cross_fade(void);
double
pc_get_total_play_time(void);
#endif
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