Merge branch 'refs/heads/t/gui-improvements'
[paraslash.git] / afh.c
1 /*
2 * Copyright (C) 2008 Andre Noll <maan@tuebingen.mpg.de>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file afh.c Paraslash's standalone audio format handler tool. */
8
9 #include <regex.h>
10
11 #include "para.h"
12 #include "string.h"
13 #include "afh.cmdline.h"
14 #include "fd.h"
15 #include "afh.h"
16 #include "error.h"
17 #include "version.h"
18 #include "ggo.h"
19
20 static struct afh_args_info conf;
21 INIT_AFH_ERRLISTS;
22
23 static int loglevel;
24 INIT_STDERR_LOGGING(loglevel)
25
26 static inline bool tag_needs_update(bool given, const char *tag,
27 const char *arg)
28 {
29 return given && (!tag || strcmp(tag, arg) != 0);
30 }
31
32 static int rewrite_tags(const char *name, int input_fd, void *map,
33 size_t map_size, int audio_format_id, struct afh_info *afhi)
34 {
35 struct taginfo *tags = &afhi->tags;
36 bool modified = false;
37 char *tmp_name;
38 int output_fd = -1, ret;
39 struct stat sb;
40
41 if (tag_needs_update(conf.year_given, tags->year, conf.year_arg)) {
42 free(tags->year);
43 tags->year = para_strdup(conf.year_arg);
44 modified = true;
45 }
46 if (tag_needs_update(conf.title_given, tags->title, conf.title_arg)) {
47 free(tags->title);
48 tags->title = para_strdup(conf.title_arg);
49 modified = true;
50 }
51 if (tag_needs_update(conf.artist_given, tags->artist,
52 conf.artist_arg)) {
53 free(tags->artist);
54 tags->artist = para_strdup(conf.artist_arg);
55 modified = true;
56 }
57 if (tag_needs_update(conf.album_given, tags->album, conf.album_arg)) {
58 free(tags->album);
59 tags->album = para_strdup(conf.album_arg);
60 modified = true;
61 }
62 if (tag_needs_update(conf.comment_given, tags->comment,
63 conf.comment_arg)) {
64 free(tags->comment);
65 tags->comment = para_strdup(conf.comment_arg);
66 modified = true;
67 }
68 if (!modified) {
69 PARA_WARNING_LOG("no modifications necessary\n");
70 return 0;
71 }
72 /*
73 * mkstmp() creates the temporary file with permissions 0600, but we
74 * like it to have the same permissions as the original file, so we
75 * have to get this information.
76 */
77 if (fstat(input_fd, &sb) < 0) {
78 ret = -ERRNO_TO_PARA_ERROR(errno);
79 PARA_ERROR_LOG("failed to fstat fd %d (%s)\n", input_fd, name);
80 return ret;
81 }
82 tmp_name = make_message("%s.XXXXXX", name);
83 ret = mkstemp(tmp_name);
84 if (ret < 0) {
85 ret = -ERRNO_TO_PARA_ERROR(errno);
86 PARA_ERROR_LOG("could not create temporary file\n");
87 goto out;
88 }
89 output_fd = ret;
90 if (fchmod(output_fd, sb.st_mode) < 0) {
91 ret = -ERRNO_TO_PARA_ERROR(errno);
92 PARA_ERROR_LOG("failed to fchmod fd %d (%s)\n", output_fd,
93 tmp_name);
94 goto out;
95 }
96 ret = afh_rewrite_tags(audio_format_id, map, map_size, tags, output_fd,
97 tmp_name);
98 if (ret < 0)
99 goto out;
100 if (conf.backup_given) {
101 char *backup_name = make_message("%s~", name);
102 ret = xrename(name, backup_name);
103 free(backup_name);
104 if (ret < 0)
105 goto out;
106 }
107 ret = xrename(tmp_name, name);
108 out:
109 if (ret < 0 && output_fd >= 0)
110 unlink(tmp_name); /* ignore errors */
111 free(tmp_name);
112 if (output_fd >= 0)
113 close(output_fd);
114 return ret;
115 }
116
117 static void print_info(int audio_format_num, struct afh_info *afhi)
118 {
119 char *msg;
120
121 afh_get_afhi_txt(audio_format_num, afhi, &msg);
122 printf("%s", msg);
123 free(msg);
124 }
125
126 static void print_chunk_table(struct afh_info *afhi)
127 {
128 int i;
129
130 if (conf.parser_friendly_given) {
131 printf("chunk_table: ");
132 for (i = 0; i <= afhi->chunks_total; i++)
133 printf("%u ", afhi->chunk_table[i]);
134 printf("\n");
135 return;
136 }
137 for (i = 1; i <= afhi->chunks_total; i++) {
138 struct timeval tv;
139 long unsigned from, to;
140 tv_scale(i - 1, &afhi->chunk_tv, &tv);
141 from = tv2ms(&tv);
142 tv_scale(i, &afhi->chunk_tv, &tv);
143 to = tv2ms(&tv);
144 printf("%d [%lu.%03lu - %lu.%03lu] %u - %u (%u)\n", i - 1,
145 from / 1000, from % 1000, to / 1000, to % 1000,
146 afhi->chunk_table[i - 1], afhi->chunk_table[i],
147 afhi->chunk_table[i] - afhi->chunk_table[i - 1]);
148 }
149 }
150
151 __noreturn static void print_help_and_die(void)
152 {
153 struct ggo_help h = DEFINE_GGO_HELP(afh);
154 int d = conf.detailed_help_given;
155 unsigned flags = d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS;
156
157 ggo_print_help(&h, flags);
158 printf("supported audio formats: %s\n", AUDIO_FORMAT_HANDLERS);
159 exit(EXIT_SUCCESS);
160 }
161
162 /**
163 * The main function of para_afh.
164 *
165 * \param argc Usual argument count.
166 * \param argv Usual argument vector.
167 *
168 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
169 */
170 int main(int argc, char **argv)
171 {
172 int i, ret, audio_format_num, fd;
173 void *audio_file_data;
174 size_t audio_file_size;
175 struct afh_info afhi;
176
177 afh_cmdline_parser(argc, argv, &conf);
178 loglevel = get_loglevel_by_name(conf.loglevel_arg);
179 version_handle_flag("afh", conf.version_given);
180 if (conf.help_given || conf.detailed_help_given)
181 print_help_and_die();
182 afh_init();
183 ret = -E_AFH_SYNTAX;
184 if (conf.inputs_num == 0)
185 goto out;
186 for (i = 0; i < conf.inputs_num; i++) {
187 int ret2;
188 ret = mmap_full_file(conf.inputs[i], O_RDONLY, &audio_file_data,
189 &audio_file_size, &fd);
190 if (ret < 0) {
191 PARA_ERROR_LOG("failed to mmap \"%s\"\n", conf.inputs[i]);
192 goto out;
193 }
194 ret = compute_afhi(conf.inputs[i], audio_file_data, audio_file_size,
195 fd, &afhi);
196 if (ret >= 0) {
197 audio_format_num = ret;
198 if (conf.modify_given) {
199 ret = rewrite_tags(conf.inputs[i], fd, audio_file_data,
200 audio_file_size, audio_format_num, &afhi);
201 } else {
202 printf("File %d: %s\n", i + 1, conf.inputs[i]);
203 print_info(audio_format_num, &afhi);
204 if (conf.chunk_table_given)
205 print_chunk_table(&afhi);
206 printf("\n");
207 }
208 clear_afhi(&afhi);
209 }
210 close(fd);
211 ret2 = para_munmap(audio_file_data, audio_file_size);
212 if (ret2 < 0 && ret >= 0)
213 ret = ret2;
214 if (ret < 0)
215 break;
216 }
217 out:
218 if (ret < 0)
219 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
220 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
221 }