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 *
9 * Copyright (C) 2013 Marcin Bukat
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
15 *
16 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
17 * KIND, either express or implied.
18 *
19 ****************************************************************************/
20
21#include "plugin.h"
22#include <tlsf.h>
23#include "lua.h"
24static const unsigned int sentinel = 0xBA5EFAC7;
25#define SENTINEL(n) (sentinel ^ (n))
26
27static char *pluginbuf_ptr = NULL;
28static size_t pluginbuf_size = 0;
29static char *audiobuf_ptr = NULL;
30static size_t audiobuf_size = 0;
31
32static void set_sentinel(void* buf, size_t size)
33{
34 size_t i;
35 unsigned int *b = (int*) buf;
36 for(i = 0; i < size / sizeof(sentinel); i++)
37 *b++ = SENTINEL(i);
38}
39
40static size_t check_sentinel(void* buf, size_t size)
41{
42 const size_t sz = size / sizeof(sentinel);
43 size_t unused = 0;
44 size_t i;
45 unsigned int *b = (int*) buf;
46 for(i = 0; i < sz; i++)
47 if (b[i] == SENTINEL(i))
48 {
49 unused++;
50 while(++i < sz && b[i] == SENTINEL(i) && ++unused)
51 {;;}
52 }
53 return unused * sizeof(sentinel);
54}
55
56size_t rock_get_allocated_bytes(void)
57{
58 return pluginbuf_size + audiobuf_size;
59}
60
61size_t rock_get_unused_bytes(void)
62{
63 size_t unused = 0;
64 if (pluginbuf_size)
65 unused += check_sentinel(pluginbuf_ptr, pluginbuf_size);
66 if (audiobuf_size)
67 unused += check_sentinel(audiobuf_ptr, audiobuf_size);
68 return unused;
69}
70
71void *get_new_area(size_t *size)
72{
73 if (pluginbuf_ptr == NULL)
74 {
75 pluginbuf_ptr = rb->plugin_get_buffer(size);
76
77 pluginbuf_size = *size;
78 set_sentinel(pluginbuf_ptr, pluginbuf_size);
79
80 /* kill tlsf signature if any */
81 memset(pluginbuf_ptr, 0, 4);
82
83 return pluginbuf_ptr;
84 }
85
86 /* only grab the next area if lua already tried + failed to garbage collect*/
87 if (audiobuf_ptr == NULL && (get_lua_OOM())->count > 0)
88 {
89 /* grab audiobuffer */
90 audiobuf_ptr = rb->plugin_get_audio_buffer(size);
91
92 audiobuf_size = *size;
93 set_sentinel(audiobuf_ptr, audiobuf_size);
94
95 return audiobuf_ptr;
96 }
97
98 *size = 0;
99 return ((void *) ~0u);
100}