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