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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Ray Lambert
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _ABREPEAT_H_
#define _ABREPEAT_H_
#ifdef AB_REPEAT_ENABLE
#include <stdbool.h>
#include "audio.h"
#include "kernel.h" /* needed for HZ */
#define AB_MARKER_NONE 0
#include "settings.h"
void ab_repeat_init(void);
bool ab_before_A_marker(unsigned int song_position);
bool ab_after_A_marker(unsigned int song_position);
void ab_jump_to_A_marker(void);
void ab_reset_markers(void);
void ab_set_A_marker(unsigned int song_position);
void ab_set_B_marker(unsigned int song_position);
/* These return whether the marker are actually set.
* The actual positions are returned via output parameter */
bool ab_get_A_marker(unsigned int *song_position);
bool ab_get_B_marker(unsigned int *song_position);
void ab_end_of_track_report(void);
/* These functions really need to be inlined for speed */
extern unsigned int ab_A_marker;
extern unsigned int ab_B_marker;
static inline bool ab_repeat_mode_enabled(void)
{
return global_settings.repeat_mode == REPEAT_AB;
}
static inline bool ab_reached_B_marker(unsigned int song_position)
{
/* following is the size of the window in which we'll detect that the B marker
was hit; it must be larger than the frequency (in milliseconds) at which this
function is called otherwise detection of the B marker will be unreliable */
/* On swcodec, the worst case seems to be 9600kHz with 1024 samples between
* calls, meaning ~9 calls per second, look within 1/5 of a second */
#define B_MARKER_DETECT_WINDOW 200
if (ab_B_marker != AB_MARKER_NONE)
{
if ( (song_position >= ab_B_marker)
&& (song_position <= (ab_B_marker+B_MARKER_DETECT_WINDOW)) )
return true;
}
return false;
}
static inline void ab_position_report(unsigned long position)
{
if (ab_repeat_mode_enabled())
{
if ( !(audio_status() & AUDIO_STATUS_PAUSE) &&
ab_reached_B_marker(position) )
{
ab_jump_to_A_marker();
}
}
}
#endif
#endif /* _ABREPEAT_H_ */
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