tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2008 by Thomas Martitz
11 * Copyright (C) 2008 by Martin Ritter
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ****************************************************************************/
22
23#include <stdbool.h>
24#include "config.h"
25#include "backlight-target.h"
26#include "system.h"
27#include "backlight.h"
28#include "backlight-sw-fading.h"
29
30#ifndef BRIGHTNESS_STEP
31#define BRIGHTNESS_STEP 1
32#endif
33
34/* To adapt a target do:
35 * - make sure backlight_hw_on doesn't set the brightness to something other than
36 * the previous value (lowest brightness in most cases)
37 * add proper #defines for software fading
38 */
39
40/* can be MIN_BRIGHTNESS_SETTING-1 */
41static int current_brightness = DEFAULT_BRIGHTNESS_SETTING;
42
43void _backlight_fade_update_state(int brightness)
44{
45 current_brightness = brightness;
46}
47
48/* returns true if fade is finished */
49static bool _backlight_fade_up(void)
50{
51 if (LIKELY(current_brightness < backlight_brightness))
52 {
53#if BRIGHTNESS_STEP == 1
54 backlight_hw_brightness(++current_brightness);
55#else
56 current_brightness += BRIGHTNESS_STEP;
57 if (current_brightness > MAX_BRIGHTNESS_SETTING)
58 current_brightness = MAX_BRIGHTNESS_SETTING;
59 backlight_hw_brightness(current_brightness);
60#endif
61 }
62 return(current_brightness >= backlight_brightness);
63}
64
65/* returns true if fade is finished */
66static bool _backlight_fade_down(void)
67{
68 if (LIKELY(current_brightness > MIN_BRIGHTNESS_SETTING))
69 {
70#if BRIGHTNESS_STEP == 1
71 backlight_hw_brightness(--current_brightness);
72#else
73 current_brightness -= BRIGHTNESS_STEP;
74 if (current_brightness < MIN_BRIGHTNESS_SETTING)
75 current_brightness = MIN_BRIGHTNESS_SETTING;
76 backlight_hw_brightness(current_brightness);
77#endif
78 return false;
79 }
80 else
81 {
82 /* decrement once more, since backlight is off */
83#if BRIGHTNESS_STEP == 1
84 current_brightness--;
85#else
86 current_brightness=MIN_BRIGHTNESS_SETTING -1;
87#endif
88 backlight_hw_off();
89 return true;
90 }
91}
92
93bool _backlight_fade_step(int direction)
94{
95 bool done;
96 switch(direction)
97 {
98 case FADING_UP:
99 done = _backlight_fade_up();
100 break;
101 case FADING_DOWN:
102 done = _backlight_fade_down();
103 break;
104 default:
105 done = true;
106 break;
107 }
108 return(done);
109}