apps/abrepeat.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Ray Lambert
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef _ABREPEAT_H_
  22 #define _ABREPEAT_H_
  23
  24 #include "system.h"
  25
  26 #ifdef AB_REPEAT_ENABLE
  27 #include "audio.h"
  28 #include "kernel.h"
  29 #include <stdbool.h>
  30
  31 #define AB_MARKER_NONE 0
  32
  33 #if (AB_REPEAT_ENABLE == 1)
  34 #include "settings.h"
  35 #endif
  36
  37 void ab_repeat_init(void);
  38 #if 0 /* Currently unused */
  39 unsigned int ab_get_A_marker(void);
  40 unsigned int ab_get_B_marker(void);
  41 #endif /* if 0 */
  42 bool ab_before_A_marker(unsigned int song_position);
  43 bool ab_after_A_marker(unsigned int song_position);
  44 void ab_jump_to_A_marker(void);
  45 void ab_reset_markers(void);
  46 void ab_set_A_marker(unsigned int song_position);
  47 void ab_set_B_marker(unsigned int song_position);
  48 #if (CONFIG_CODEC == SWCODEC)
  49 void ab_end_of_track_report(void);
  50 #endif
  51 #ifdef HAVE_LCD_BITMAP
  52 #include "screen_access.h"
  53 void ab_draw_markers(struct screen * screen, int capacity,
  54                      int x0, int x1, int y, int h);
  55 #endif
  56
  57 /* These functions really need to be inlined for speed */
  58 extern unsigned int ab_A_marker;
  59 extern unsigned int ab_B_marker;
  60
  61 static inline bool ab_A_marker_set(void)
  62 {
  63     return ab_A_marker != AB_MARKER_NONE;
  64 }
  65
  66 static inline bool ab_B_marker_set(void)
  67 {
  68     return ab_B_marker != AB_MARKER_NONE;
  69 }
  70
  71 static inline bool ab_repeat_mode_enabled(void)
  72 {
  73 #if (AB_REPEAT_ENABLE == 2)
  74     return ab_A_marker_set() || ab_B_marker_set();
  75 #else
  76     return global_settings.repeat_mode == REPEAT_AB;
  77 #endif
  78 }
  79
  80 static inline bool ab_reached_B_marker(unsigned int song_position)
  81 {
  82 /* following is the size of the window in which we'll detect that the B marker
  83 was hit; it must be larger than the frequency (in milliseconds) at which this
  84 function is called otherwise detection of the B marker will be unreliable */
  85 #if (CONFIG_CODEC == SWCODEC)
  86 /* On swcodec, the worst case seems to be 9600kHz with 1024 samples between
  87  * calls, meaning ~9 calls per second, look within 1/5 of a second */
  88 #define B_MARKER_DETECT_WINDOW 200
  89 #else
  90 /* we assume that this function will be called on each system tick and derive
  91 the window size from this with a generous margin of error (note: the number
  92 of ticks per second is given by HZ) */
  93 #define B_MARKER_DETECT_WINDOW ((1000/HZ)*10)
  94 #endif
  95     if (ab_B_marker != AB_MARKER_NONE)
  96     {
  97         if ( (song_position >= ab_B_marker)
  98         && (song_position <= (ab_B_marker+B_MARKER_DETECT_WINDOW)) )
  99             return true;
 100     }
 101     return false;
 102 }
 103
 104 #if (CONFIG_CODEC == SWCODEC)
 105 static inline void ab_position_report(unsigned long position)
 106 {
 107     if (ab_repeat_mode_enabled())
 108     {
 109         if ( !(audio_status() & AUDIO_STATUS_PAUSE) &&
 110                 ab_reached_B_marker(position) )
 111         {
 112             ab_jump_to_A_marker();
 113         }
 114     }
 115 }
 116 #endif
 117
 118 #endif
 119
 120 #endif /* _ABREPEAT_H_ */