2 * Copyright (C) 2008-2011 by ProFUSION embedded systems
3 * Copyright (C) 2007 by INdT
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public License
7 * as published by the Free Software Foundation; either version 2.1 of
8 * the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * @author Gustavo Sverzut Barbieri <barbieri@profusion.mobi>
34 #define _XOPEN_SOURCE 600
35 #include <lightmediascanner_plugin.h>
36 #include <lightmediascanner_utils.h>
37 #include <lightmediascanner_db.h>
38 #include <sys/types.h>
48 static inline unsigned int
49 _chunk_to_uint(unsigned char *buf)
51 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
55 _png_data_get(int fd, struct lms_image_info *info)
57 unsigned char buf[16], *p;
58 const unsigned char sig[8] = {0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa};
59 const unsigned char ihdr[4] = {'I', 'H', 'D', 'R'};
62 if (read(fd, buf, sizeof(buf)) != sizeof(buf)) {
67 if (memcmp(buf, sig, sizeof(sig)) != 0) {
68 fprintf(stderr, "ERROR: invalid PNG signature.\n");
72 p = buf + sizeof(sig) + 4;
73 if (memcmp(p, ihdr, sizeof(ihdr)) != 0) {
74 fprintf(stderr, "ERROR: invalid first chunk: %4.4s.\n", p);
78 p = buf + sizeof(sig);
79 length = _chunk_to_uint(p);
81 fprintf(stderr, "ERROR: IHDR chunk size is too small: %d.\n", length);
85 if (read(fd, buf, 8) != 8) {
89 info->width = _chunk_to_uint(buf);
90 info->height = _chunk_to_uint(buf + 4);
95 static const char _name[] = "png";
96 static const struct lms_string_size _exts[] = {
97 LMS_STATIC_STRING_SIZE(".png")
99 static const char *_cats[] = {
104 static const char *_authors[] = {
105 "Gustavo Sverzut Barbieri",
110 struct lms_plugin plugin;
111 lms_db_image_t *img_db;
115 _match(struct plugin *p, const char *path, int len, int base)
119 i = lms_which_extension(path, len, _exts, LMS_ARRAY_SIZE(_exts));
123 return (void*)(i + 1);
127 _parse(struct plugin *plugin, struct lms_context *ctxt, const struct lms_file_info *finfo, void *match)
129 struct lms_image_info info = {0};
132 fd = open(finfo->path, O_RDONLY);
138 if (_png_data_get(fd, &info) != 0) {
144 info.date = finfo->mtime;
146 if (!info.title.str) {
149 ext_idx = ((long)match) - 1;
150 info.title.len = finfo->path_len - finfo->base - _exts[ext_idx].len;
151 info.title.str = malloc((info.title.len + 1) * sizeof(char));
152 memcpy(info.title.str, finfo->path + finfo->base, info.title.len);
153 info.title.str[info.title.len] = '\0';
157 lms_charset_conv(ctxt->cs_conv, &info.title.str, &info.title.len);
159 lms_charset_conv(ctxt->cs_conv, &info.artist.str, &info.artist.len);
162 r = lms_db_image_add(plugin->img_db, &info);
165 free(info.title.str);
166 free(info.artist.str);
168 posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
175 _setup(struct plugin *plugin, struct lms_context *ctxt)
177 plugin->img_db = lms_db_image_new(ctxt->db);
185 _start(struct plugin *plugin, struct lms_context *ctxt)
187 return lms_db_image_start(plugin->img_db);
191 _finish(struct plugin *plugin, struct lms_context *ctxt)
194 return lms_db_image_free(plugin->img_db);
201 _close(struct plugin *plugin)
207 API struct lms_plugin *
208 lms_plugin_open(void)
210 struct plugin *plugin;
212 plugin = malloc(sizeof(*plugin));
213 plugin->plugin.name = _name;
214 plugin->plugin.match = (lms_plugin_match_fn_t)_match;
215 plugin->plugin.parse = (lms_plugin_parse_fn_t)_parse;
216 plugin->plugin.close = (lms_plugin_close_fn_t)_close;
217 plugin->plugin.setup = (lms_plugin_setup_fn_t)_setup;
218 plugin->plugin.start = (lms_plugin_start_fn_t)_start;
219 plugin->plugin.finish = (lms_plugin_finish_fn_t)_finish;
221 return (struct lms_plugin *)plugin;
224 API const struct lms_plugin_info *
225 lms_plugin_info(void)
227 static struct lms_plugin_info info = {
233 "http://lms.garage.maemo.org"