1 /*
2 * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
3 *
4 * This file is part of libass.
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include "config.h"
20 #include "ass_compat.h"
21
22 #include <inttypes.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <stdarg.h>
27
28 #include "ass.h"
29 #include "ass_library.h"
30 #include "ass_utils.h"
31 #include "ass_string.h"
32
ass_msg_handler(int level,const char * fmt,va_list va,void * data)33 static void ass_msg_handler(int level, const char *fmt, va_list va, void *data)
34 {
35 if (level > MSGL_INFO)
36 return;
37 fprintf(stderr, "[ass] ");
38 vfprintf(stderr, fmt, va);
39 fprintf(stderr, "\n");
40 }
41
ass_library_init(void)42 ASS_Library *ass_library_init(void)
43 {
44 ASS_Library* lib = calloc(1, sizeof(*lib));
45 if (lib)
46 lib->msg_callback = ass_msg_handler;
47 return lib;
48 }
49
ass_library_done(ASS_Library * priv)50 void ass_library_done(ASS_Library *priv)
51 {
52 if (priv) {
53 ass_set_fonts_dir(priv, NULL);
54 ass_set_style_overrides(priv, NULL);
55 ass_clear_fonts(priv);
56 free(priv);
57 }
58 }
59
ass_set_fonts_dir(ASS_Library * priv,const char * fonts_dir)60 void ass_set_fonts_dir(ASS_Library *priv, const char *fonts_dir)
61 {
62 free(priv->fonts_dir);
63
64 priv->fonts_dir = fonts_dir ? strdup(fonts_dir) : 0;
65 }
66
ass_set_extract_fonts(ASS_Library * priv,int extract)67 void ass_set_extract_fonts(ASS_Library *priv, int extract)
68 {
69 priv->extract_fonts = !!extract;
70 }
71
ass_set_style_overrides(ASS_Library * priv,char ** list)72 void ass_set_style_overrides(ASS_Library *priv, char **list)
73 {
74 char **p;
75 char **q;
76 int cnt;
77
78 if (priv->style_overrides) {
79 for (p = priv->style_overrides; *p; ++p)
80 free(*p);
81 }
82 free(priv->style_overrides);
83 priv->style_overrides = NULL;
84
85 if (!list)
86 return;
87
88 for (p = list, cnt = 0; *p; ++p, ++cnt) {
89 }
90
91 priv->style_overrides = calloc(cnt + 1, sizeof(char *));
92 if (!priv->style_overrides)
93 return;
94 for (p = list, q = priv->style_overrides; *p; ++p, ++q)
95 *q = strdup(*p);
96 }
97
ass_add_font(ASS_Library * priv,const char * name,const char * data,int size)98 void ass_add_font(ASS_Library *priv, const char *name, const char *data, int size)
99 {
100 size_t idx = priv->num_fontdata;
101 if (!name || !data || !size)
102 return;
103 if (!(idx & (idx - 32)) && // power of two >= 32, or zero --> time for realloc
104 !ASS_REALLOC_ARRAY(priv->fontdata, FFMAX(2 * idx, 32)))
105 return;
106
107 priv->fontdata[idx].name = strdup(name);
108 priv->fontdata[idx].data = malloc(size);
109
110 if (!priv->fontdata[idx].name || !priv->fontdata[idx].data)
111 goto error;
112
113 memcpy(priv->fontdata[idx].data, data, size);
114
115 priv->fontdata[idx].size = size;
116
117 priv->num_fontdata++;
118 return;
119
120 error:
121 free(priv->fontdata[idx].name);
122 free(priv->fontdata[idx].data);
123 }
124
ass_clear_fonts(ASS_Library * priv)125 void ass_clear_fonts(ASS_Library *priv)
126 {
127 for (size_t i = 0; i < priv->num_fontdata; i++) {
128 free(priv->fontdata[i].name);
129 free(priv->fontdata[i].data);
130 }
131 free(priv->fontdata);
132 priv->fontdata = NULL;
133 priv->num_fontdata = 0;
134 }
135
136 /*
137 * Register a message callback function with libass. Without setting one,
138 * a default handler is used which prints everything with MSGL_INFO or
139 * higher to the standard output.
140 *
141 * \param msg_cb the callback function
142 * \param data additional data that will be passed to the callback
143 */
ass_set_message_cb(ASS_Library * priv,void (* msg_cb)(int,const char *,va_list,void *),void * data)144 void ass_set_message_cb(ASS_Library *priv,
145 void (*msg_cb)(int, const char *, va_list, void *),
146 void *data)
147 {
148 if (msg_cb) {
149 priv->msg_callback = msg_cb;
150 priv->msg_callback_data = data;
151 }
152 }
153