song_task.h

ATMEL 89c51sndc mp3外接硬盘源码

/*H**************************************************************************
* NAME:         song_task.h
*----------------------------------------------------------------------------
* Copyright (c) 2002 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      snd1c-demo-hdd-0_2_0      
* REVISION:     1.1     
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the song task definition
*****************************************************************************/

#ifndef _SONG_TASK_H_
#define _SONG_TASK_H_

/*_____ I N C L U D E S ____________________________________________________*/


/*_____ M A C R O S ________________________________________________________*/

/*----- Task states -----*/
#define SONG_START                          0
#define SONG_INSTALL                        1
#define SONG_IDLE                           2
#define SONG_INIT                           3
#define SONG_PLAY                           4
#define SONG_PLL                            5
#define SONG_PAUSE                          6
#define SONG_NEW                            7
#define SONG_STOP                           8
#define SONG_NO_SONG                        9
#define SONG_ERROR                          10
#define SONG_PLAY_A_B                       11
#define SONG_PLAY_A_B_MUTE                  12
#define SONG_DETECT_REPEAT_KEY_NEXT         13
#define SONG_DETECT_REPEAT_KEY_PREV         14
#define SONG_DETECT_REPEAT_KEY_END          15
#define SONG_PLAY_REPEAT_KEY                16
#define SONG_PLAY_NEXT_FILE                 17
#define SONG_DELETE                         18

/* Time constant for repeat A/B mode */
#define SONG_A_B_MUTE_NB                                (250 / SCHEDULER_TICK)
/* Definition for repeat A/B mode */
#define SONG_PRE_SAMPLING                               (256)     /* 1024 / 256 -> 1s / 4 -> 250 ms*/
/* Fast forward and fast rewind time unit (in s) */
#define SONG_REPEAT_TIME_FFW                            2   /* 2 seconds fast forward */
#define SONG_REPEAT_TIME_FRW                            3   /* 3 seconds fast forward */
/* Total frame size for a file seek, that is x second unit */
#define SONG_SKEEP_FRAME_FFW                            SONG_REPEAT_TIME_FFW * 1024
#define SONG_SKEEP_FRAME_FRW                            SONG_REPEAT_TIME_FRW * 1024


/* Constant for repeat key behavour in ms */
#define SONG_UNMUTE_PLAY_DURATION                   (300 / SCHEDULER_TICK)
#define SONG_MUTE_DURATION                          (30  / SCHEDULER_TICK)
#define SONG_START_TIME_VOL                         (10 / SCHEDULER_TICK)


/*_____ D E F I N I T I O N ________________________________________________*/


/*_____ D E C L A R A T I O N ______________________________________________*/

void    song_task_init (void);
void    song_task (void);


#endif  /* _SONG_TASK_H_ */