apps/abrepeat.h

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