87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Ray Lambert
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _ABREPEAT_H_
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#define _ABREPEAT_H_
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#ifdef AB_REPEAT_ENABLE
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#include <stdbool.h>
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#include "audio.h"
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#include "kernel.h" /* needed for HZ */
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#define AB_MARKER_NONE 0
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#include "settings.h"
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void ab_repeat_init(void);
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bool ab_before_A_marker(unsigned int song_position);
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bool ab_after_A_marker(unsigned int song_position);
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void ab_jump_to_A_marker(void);
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void ab_reset_markers(void);
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void ab_set_A_marker(unsigned int song_position);
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void ab_set_B_marker(unsigned int song_position);
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/* These return whether the marker are actually set.
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* The actual positions are returned via output parameter */
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bool ab_get_A_marker(unsigned int *song_position);
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bool ab_get_B_marker(unsigned int *song_position);
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void ab_end_of_track_report(void);
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/* These functions really need to be inlined for speed */
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extern unsigned int ab_A_marker;
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extern unsigned int ab_B_marker;
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static inline bool ab_repeat_mode_enabled(void)
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{
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return global_settings.repeat_mode == REPEAT_AB;
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}
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static inline bool ab_reached_B_marker(unsigned int song_position)
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{
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/* following is the size of the window in which we'll detect that the B marker
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was hit; it must be larger than the frequency (in milliseconds) at which this
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function is called otherwise detection of the B marker will be unreliable */
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/* On swcodec, the worst case seems to be 9600kHz with 1024 samples between
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* calls, meaning ~9 calls per second, look within 1/5 of a second */
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#define B_MARKER_DETECT_WINDOW 200
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if (ab_B_marker != AB_MARKER_NONE)
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{
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if ( (song_position >= ab_B_marker)
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&& (song_position <= (ab_B_marker+B_MARKER_DETECT_WINDOW)) )
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return true;
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}
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return false;
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}
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static inline void ab_position_report(unsigned long position)
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{
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if (ab_repeat_mode_enabled())
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{
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if ( !(audio_status() & AUDIO_STATUS_PAUSE) &&
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ab_reached_B_marker(position) )
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{
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ab_jump_to_A_marker();
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}
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}
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}
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#endif
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#endif /* _ABREPEAT_H_ */
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