Merge branch 'refs/heads/t/xz'
[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, int audio_format_id,
129 const void *map, size_t mapsize)
130 {
131 int i, ret;
132 void *ctx = NULL;
133
134 for (i = 0; i < afhi->chunks_total; i++) {
135 struct timeval tv;
136 long unsigned from, to;
137 const char *buf;
138 size_t len;
139 tv_scale(i, &afhi->chunk_tv, &tv);
140 from = tv2ms(&tv);
141 tv_scale(i + 1, &afhi->chunk_tv, &tv);
142 to = tv2ms(&tv);
143 ret = afh_get_chunk(i, afhi, audio_format_id, map, mapsize,
144 &buf, &len, &ctx);
145 if (ret < 0) {
146 PARA_ERROR_LOG("fatal: chunk %d: %s\n", i,
147 para_strerror(-ret));
148 return;
149 }
150 if (!conf.parser_friendly_given)
151 printf("%d [%lu.%03lu - %lu.%03lu] ", i, from / 1000,
152 from % 1000, to / 1000, to % 1000);
153 printf("%td - %td", buf - (const char *)map,
154 buf + len - (const char *)map);
155 if (!conf.parser_friendly_given)
156 printf(" (%zu)", len);
157 printf("\n");
158 }
159 afh_close(ctx, audio_format_id);
160 }
161
162 __noreturn static void print_help_and_die(void)
163 {
164 struct ggo_help h = DEFINE_GGO_HELP(afh);
165 int d = conf.detailed_help_given;
166 unsigned flags = d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS;
167
168 ggo_print_help(&h, flags);
169 printf("supported audio formats: %s\n", AUDIO_FORMAT_HANDLERS);
170 exit(EXIT_SUCCESS);
171 }
172
173 /**
174 * The main function of para_afh.
175 *
176 * \param argc Usual argument count.
177 * \param argv Usual argument vector.
178 *
179 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
180 */
181 int main(int argc, char **argv)
182 {
183 int i, ret = 0, audio_format_num, fd;
184 void *audio_file_data;
185 size_t audio_file_size;
186 struct afh_info afhi;
187
188 afh_cmdline_parser(argc, argv, &conf);
189 loglevel = get_loglevel_by_name(conf.loglevel_arg);
190 version_handle_flag("afh", conf.version_given);
191 if (conf.help_given || conf.detailed_help_given || conf.inputs_num == 0)
192 print_help_and_die();
193 afh_init();
194 for (i = 0; i < conf.inputs_num; i++) {
195 int ret2;
196 ret = mmap_full_file(conf.inputs[i], O_RDONLY, &audio_file_data,
197 &audio_file_size, &fd);
198 if (ret < 0) {
199 PARA_ERROR_LOG("failed to mmap \"%s\"\n", conf.inputs[i]);
200 goto out;
201 }
202 ret = compute_afhi(conf.inputs[i], audio_file_data, audio_file_size,
203 fd, &afhi);
204 if (ret >= 0) {
205 audio_format_num = ret;
206 if (conf.modify_given) {
207 ret = rewrite_tags(conf.inputs[i], fd, audio_file_data,
208 audio_file_size, audio_format_num, &afhi);
209 } else {
210 printf("File %d: %s\n", i + 1, conf.inputs[i]);
211 print_info(audio_format_num, &afhi);
212 if (conf.chunk_table_given)
213 print_chunk_table(&afhi, audio_format_num,
214 audio_file_data, audio_file_size);
215 }
216 clear_afhi(&afhi);
217 }
218 close(fd);
219 ret2 = para_munmap(audio_file_data, audio_file_size);
220 if (ret2 < 0 && ret >= 0)
221 ret = ret2;
222 if (ret < 0)
223 break;
224 }
225 out:
226 if (ret < 0)
227 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
228 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
229 }