A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
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) 2010 by Thomas Martitz
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
22
23#include "plugin.h"
24#include <setjmp.h>
25
26PLUGIN_HEADER
27
28/*
29 * EXIT_MAGIC magic, because 0 cannot be used due to setjmp()
30 * must be > 0
31 */
32#define EXIT_MAGIC 0x0CDEBABE
33
34extern enum plugin_status plugin_start(const void*);
35#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
36extern unsigned char plugin_bss_start[];
37extern unsigned char plugin_end_addr[];
38#endif
39
40static jmp_buf __exit_env;
41/* only 1 atexit handler for now, chain in the exit handler if you need more */
42static void (*atexit_handler)(void);
43
44int rb_atexit(void (*fn)(void))
45{
46 if (atexit_handler)
47 return -1;
48 atexit_handler = fn;
49 return 0;
50}
51
52void exit(int status)
53{ /* jump back in time to before starting the plugin */
54 longjmp(__exit_env, status != 0 ? status : EXIT_MAGIC);
55}
56
57void _exit(int status)
58{ /* don't call exit handler */
59 atexit_handler = NULL;
60 exit(status);
61}
62
63enum plugin_status plugin__start(const void *param)
64{
65 int exit_ret;
66 enum plugin_status ret;
67
68#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
69
70/* IRAM must be copied before clearing the BSS ! */
71#ifdef PLUGIN_USE_IRAM
72 extern char iramcopy[], iramstart[], iramend[], iedata[], iend[];
73 size_t iram_size = iramend - iramstart;
74 size_t ibss_size = iend - iedata;
75 if (iram_size > 0 || ibss_size > 0)
76 {
77 /* We need to stop audio playback in order to use codec IRAM */
78 rb->audio_stop();
79 rb->memcpy(iramstart, iramcopy, iram_size);
80 rb->memset(iedata, 0, ibss_size);
81 /* make the icache (if it exists) up to date with the new code */
82 rb->commit_discard_idcache();
83
84 /* barrier to prevent reordering iram copy and BSS clearing,
85 * because the BSS segment alias the IRAM copy.
86 */
87 asm volatile ("" ::: "memory");
88 }
89#endif /* PLUGIN_USE_IRAM */
90
91 /* zero out the bss section */
92 rb->memset(plugin_bss_start, 0, plugin_end_addr - plugin_bss_start);
93
94 /* Some parts of bss may be used via a no-cache alias (at least
95 * portalplayer has this). If we don't clear the cache, those aliases
96 * may read garbage */
97 rb->commit_dcache();
98#endif
99
100 /* we come back here if exit() was called or the plugin returned normally */
101 exit_ret = setjmp(__exit_env);
102 if (exit_ret == 0)
103 { /* start the plugin */
104 ret = plugin_start(param);
105 }
106 else
107 { /* plugin exit via exit() */
108 if (exit_ret == EXIT_MAGIC)
109 { /* exit(EXIT_SUCCESS) */
110 ret = PLUGIN_OK;
111 }
112 else if (exit_ret < INTERNAL_PLUGIN_RETVAL_START)
113 { /* exit(EXIT_FAILURE) */
114 ret = PLUGIN_ERROR;
115 }
116 else
117 { /* exit(PLUGIN_XXX) */
118 ret = (enum plugin_status)exit_ret;
119 }
120 }
121
122 /* before finishing, call the exit handler if there was one */
123 if (atexit_handler != NULL)
124 atexit_handler();
125
126 return ret;
127}
128
129static void cleanup_wrapper(void *param)
130{
131 (void)param;
132 if (atexit_handler)
133 atexit_handler();
134}
135
136void exit_on_usb(int button)
137{ /* the default handler will call the exit handler before
138 * showing the usb screen; after that we don't want the exit handler
139 * to be called a second time, hence _exit()
140 *
141 * if not usb, then the handler will only be called if powering off
142 * if poweroff, the plugin doesn't want to run any further so exit as well*/
143 long result = rb->default_event_handler_ex(button, cleanup_wrapper, NULL);
144 if (result == SYS_USB_CONNECTED)
145 _exit(PLUGIN_USB_CONNECTED);
146 else if (result == SYS_POWEROFF || result == SYS_REBOOT)
147 /* note: nobody actually pays attention to this exit code */
148 _exit(PLUGIN_POWEROFF);
149}