src/metaflac/operations_shorthand_cuesheet.c

   1 /* metaflac - Command-line FLAC metadata editor
   2  * Copyright (C) 2001,2002,2003,2004,2005,2006,2007  Josh Coalson
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #if HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22
  23 #include <errno.h>
  24 #include <stdio.h> /* for snprintf() */
  25 #include <string.h>
  26 #include "options.h"
  27 #include "utils.h"
  28 #include "FLAC/assert.h"
  29 #include "share/grabbag.h"
  30 #include "operations_shorthand.h"
  31
  32 static FLAC__bool import_cs_from(const char *filename, FLAC__StreamMetadata **cuesheet, const char *cs_filename, FLAC__bool *needs_write, FLAC__uint64 lead_out_offset, FLAC__bool is_cdda, Argument_AddSeekpoint *add_seekpoint_link);
  33 static FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename);
  34
  35 FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
  36 {
  37         FLAC__bool ok = true;
  38         FLAC__StreamMetadata *cuesheet = 0;
  39         FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
  40         FLAC__uint64 lead_out_offset = 0;
  41         FLAC__bool is_cdda = false;
  42
  43         if(0 == iterator)
  44                 die("out of memory allocating iterator");
  45
  46         FLAC__metadata_iterator_init(iterator, chain);
  47
  48         do {
  49                 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
  50                 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
  51                         lead_out_offset = block->data.stream_info.total_samples;
  52                         if(lead_out_offset == 0) {
  53                                 fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);
  54                                 FLAC__metadata_iterator_delete(iterator);
  55                                 return false;
  56                         }
  57                         is_cdda = (block->data.stream_info.channels == 1 || block->data.stream_info.channels == 2) && (block->data.stream_info.bits_per_sample == 16) && (block->data.stream_info.sample_rate == 44100);
  58                 }
  59                 else if(block->type == FLAC__METADATA_TYPE_CUESHEET)
  60                         cuesheet = block;
  61         } while(FLAC__metadata_iterator_next(iterator));
  62
  63         if(lead_out_offset == 0) {
  64                 fprintf(stderr, "%s: ERROR: FLAC stream has no STREAMINFO block\n", filename);
  65                 FLAC__metadata_iterator_delete(iterator);
  66                 return false;
  67         }
  68
  69         switch(operation->type) {
  70                 case OP__IMPORT_CUESHEET_FROM:
  71                         if(0 != cuesheet) {
  72                                 fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
  73                                 ok = false;
  74                         }
  75                         else {
  76                                 ok = import_cs_from(filename, &cuesheet, operation->argument.import_cuesheet_from.filename, needs_write, lead_out_offset, is_cdda, operation->argument.import_cuesheet_from.add_seekpoint_link);
  77                                 if(ok) {
  78                                         /* append CUESHEET block */
  79                                         while(FLAC__metadata_iterator_next(iterator))
  80                                                 ;
  81                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
  82                                                 print_error_with_chain_status(chain, "%s: ERROR: adding new CUESHEET block to metadata", filename);
  83                                                 FLAC__metadata_object_delete(cuesheet);
  84                                                 ok = false;
  85                                         }
  86                                 }
  87                         }
  88                         break;
  89                 case OP__EXPORT_CUESHEET_TO:
  90                         if(0 == cuesheet) {
  91                                 fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
  92                                 ok = false;
  93                         }
  94                         else
  95                                 ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);
  96                         break;
  97                 default:
  98                         ok = false;
  99                         FLAC__ASSERT(0);
 100                         break;
 101         };
 102
 103         FLAC__metadata_iterator_delete(iterator);
 104         return ok;
 105 }
 106
 107 /*
 108  * local routines
 109  */
 110
 111 FLAC__bool import_cs_from(const char *filename, FLAC__StreamMetadata **cuesheet, const char *cs_filename, FLAC__bool *needs_write, FLAC__uint64 lead_out_offset, FLAC__bool is_cdda, Argument_AddSeekpoint *add_seekpoint_link)
 112 {
 113         FILE *f;
 114         const char *error_message;
 115         char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;
 116         unsigned last_line_read;
 117
 118         if(0 == cs_filename || strlen(cs_filename) == 0) {
 119                 fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
 120                 return false;
 121         }
 122         if(0 == strcmp(cs_filename, "-"))
 123                 f = stdin;
 124         else
 125                 f = fopen(cs_filename, "r");
 126
 127         if(0 == f) {
 128                 fprintf(stderr, "%s: ERROR: can't open import file %s: %s\n", filename, cs_filename, strerror(errno));
 129                 return false;
 130         }
 131
 132         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, is_cdda, lead_out_offset);
 133
 134         if(f != stdin)
 135                 fclose(f);
 136
 137         if(0 == *cuesheet) {
 138                 fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);
 139                 return false;
 140         }
 141
 142         if(!FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/false, &error_message)) {
 143                 fprintf(stderr, "%s: ERROR parsing cuesheet \"%s\": %s\n", filename, cs_filename, error_message);
 144                 return false;
 145         }
 146
 147         /* if we're expecting CDDA, warn about non-compliance */
 148         if(is_cdda && !FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/true, &error_message)) {
 149                 fprintf(stderr, "%s: WARNING cuesheet \"%s\" is not audio CD compliant: %s\n", filename, cs_filename, error_message);
 150                 (*cuesheet)->data.cue_sheet.is_cd = false;
 151         }
 152
 153         /* add seekpoints for each index point if required */
 154         if(0 != seekpoint_specification) {
 155                 char spec[128];
 156                 unsigned track, index;
 157                 const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;
 158                 if(0 == *seekpoint_specification)
 159                         *seekpoint_specification = local_strdup("");
 160                 for(track = 0; track < cs->num_tracks; track++) {
 161                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;
 162                         for(index = 0; index < tr->num_indices; index++) {
 163 #ifdef _MSC_VER
 164                                 sprintf(spec, "%I64u;", tr->offset + tr->indices[index].offset);
 165 #else
 166                                 sprintf(spec, "%llu;", (unsigned long long)(tr->offset + tr->indices[index].offset));
 167 #endif
 168                                 local_strcat(seekpoint_specification, spec);
 169                         }
 170                 }
 171         }
 172
 173         *needs_write = true;
 174         return true;
 175 }
 176
 177 FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)
 178 {
 179         FILE *f;
 180         char *ref = 0;
 181         size_t reflen;
 182
 183         if(0 == cs_filename || strlen(cs_filename) == 0) {
 184                 fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
 185                 return false;
 186         }
 187         if(0 == strcmp(cs_filename, "-"))
 188                 f = stdout;
 189         else
 190                 f = fopen(cs_filename, "w");
 191
 192         if(0 == f) {
 193                 fprintf(stderr, "%s: ERROR: can't open export file %s: %s\n", filename, cs_filename, strerror(errno));
 194                 return false;
 195         }
 196
 197         reflen = strlen(filename) + 7 + 1;
 198         if(0 == (ref = malloc(reflen))) {
 199                 fprintf(stderr, "%s: ERROR: allocating memory\n", filename);
 200                 return false;
 201         }
 202
 203 #if defined _MSC_VER || defined __MINGW32__
 204         _snprintf(ref, reflen, "\"%s\" FLAC", filename);
 205 #else
 206         snprintf(ref, reflen, "\"%s\" FLAC", filename);
 207 #endif
 208
 209         grabbag__cuesheet_emit(f, cuesheet, ref);
 210
 211         free(ref);
 212
 213         if(f != stdout)
 214                 fclose(f);
 215
 216         return true;
 217 }