130 lines
3.8 KiB
C
130 lines
3.8 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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#include "config.h"
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#include "abrepeat.h"
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#ifdef AB_REPEAT_ENABLE
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unsigned int ab_A_marker IDATA_ATTR = AB_MARKER_NONE;
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unsigned int ab_B_marker IDATA_ATTR = AB_MARKER_NONE;
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static inline bool ab_A_marker_set(void)
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{
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return ab_A_marker != AB_MARKER_NONE;
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}
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static inline bool ab_B_marker_set(void)
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{
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return ab_B_marker != AB_MARKER_NONE;
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}
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void ab_end_of_track_report(void)
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{
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if ( ab_A_marker_set() && ! ab_B_marker_set() )
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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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void ab_repeat_init(void)
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{
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static bool ab_initialized = false;
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if ( ! ab_initialized )
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{
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ab_initialized = true;
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}
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}
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/* determines if the given song position is earlier than the A mark;
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intended for use in handling the jump NEXT and PREV commands */
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bool ab_before_A_marker(unsigned int song_position)
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{
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return (ab_A_marker != AB_MARKER_NONE)
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&& (song_position < ab_A_marker);
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}
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/* determines if the given song position is later than the A mark;
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intended for use in handling the jump PREV command */
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bool ab_after_A_marker(unsigned int song_position)
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{
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/* following is the size of the virtual A marker; we pretend that the A marker
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is larger than a single instant in order to give the user time to hit PREV again
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to jump back to the start of the song; it should be large enough to allow a
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reasonable amount of time for the typical user to react */
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#define A_MARKER_VIRTUAL_SIZE 1000
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return (ab_A_marker != AB_MARKER_NONE)
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&& (song_position > (ab_A_marker+A_MARKER_VIRTUAL_SIZE));
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}
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void ab_jump_to_A_marker(void)
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{
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audio_ff_rewind(ab_A_marker);
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}
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void ab_reset_markers(void)
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{
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ab_A_marker = AB_MARKER_NONE;
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ab_B_marker = AB_MARKER_NONE;
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}
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/* following is a fudge factor to help overcome the latency between
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the time the user hears the passage they want to mark and the time
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they actually press the button; the actual song position is adjusted
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by this fudge factor when setting a mark */
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#define EAR_TO_HAND_LATENCY_FUDGE 200
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void ab_set_A_marker(unsigned int song_position)
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{
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ab_A_marker = song_position;
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ab_A_marker = (ab_A_marker >= EAR_TO_HAND_LATENCY_FUDGE)
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? (ab_A_marker - EAR_TO_HAND_LATENCY_FUDGE) : 0;
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/* check if markers are out of order */
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if ( (ab_B_marker != AB_MARKER_NONE) && (ab_A_marker > ab_B_marker) )
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ab_B_marker = AB_MARKER_NONE;
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}
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void ab_set_B_marker(unsigned int song_position)
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{
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ab_B_marker = song_position;
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ab_B_marker = (ab_B_marker >= EAR_TO_HAND_LATENCY_FUDGE)
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? (ab_B_marker - EAR_TO_HAND_LATENCY_FUDGE) : 0;
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/* check if markers are out of order */
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if ( (ab_A_marker != AB_MARKER_NONE) && (ab_B_marker < ab_A_marker) )
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ab_A_marker = AB_MARKER_NONE;
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}
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bool ab_get_A_marker(unsigned *song_position)
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{
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*song_position = ab_A_marker;
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return ab_A_marker_set();
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}
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bool ab_get_B_marker(unsigned *song_position)
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{
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*song_position = ab_B_marker;
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return ab_B_marker_set();
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}
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#endif /* AB_REPEAT_ENABLE */
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