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 }