src/metaflac/operations_shorthand_cuesheet.c

   1 /* metaflac - Command-line FLAC metadata editor
   2  * Copyright (C) 2001,2002,2003,2004,2005,2006  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
  31 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);
  32 static FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename);
  33
  34 FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
  35 {
  36         FLAC__bool ok = true;
  37         FLAC__StreamMetadata *cuesheet = 0;
  38         FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
  39         FLAC__uint64 lead_out_offset = 0;
  40         FLAC__bool is_cdda = false;
  41
  42         if(0 == iterator)
  43                 die("out of memory allocating iterator");
  44
  45         FLAC__metadata_iterator_init(iterator, chain);
  46
  47         do {
  48                 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
  49                 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
  50                         lead_out_offset = block->data.stream_info.total_samples;
  51                         if(lead_out_offset == 0) {
  52                                 fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);
  53                                 FLAC__metadata_iterator_delete(iterator);
  54                                 return false;
  55                         }
  56                         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);
  57                 }
  58                 else if(block->type == FLAC__METADATA_TYPE_CUESHEET)
  59                         cuesheet = block;
  60         } while(FLAC__metadata_iterator_next(iterator));
  61
  62         if(lead_out_offset == 0) {
  63                 fprintf(stderr, "%s: ERROR: FLAC stream has no STREAMINFO block\n", filename);
  64                 FLAC__metadata_iterator_delete(iterator);
  65                 return false;
  66         }
  67
  68         switch(operation->type) {
  69                 case OP__IMPORT_CUESHEET_FROM:
  70                         if(0 != cuesheet) {
  71                                 fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
  72                                 ok = false;
  73                         }
  74                         else {
  75                                 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);
  76                                 if(ok) {
  77                                         /* append CUESHEET block */
  78                                         while(FLAC__metadata_iterator_next(iterator))
  79                                                 ;
  80                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
  81                                                 print_error_with_chain_status(chain, "%s: ERROR: adding new CUESHEET block to metadata", filename);
  82                                                 FLAC__metadata_object_delete(cuesheet);
  83                                                 ok = false;
  84                                         }
  85                                 }
  86                         }
  87                         break;
  88                 case OP__EXPORT_CUESHEET_TO:
  89                         if(0 == cuesheet) {
  90                                 fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
  91                                 ok = false;
  92                         }
  93                         else
  94                                 ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);
  95                         break;
  96                 default:
  97                         ok = false;
  98                         FLAC__ASSERT(0);
  99                         break;
 100         };
 101
 102         FLAC__metadata_iterator_delete(iterator);
 103         return ok;
 104 }
 105
 106 /*
 107  * local routines
 108  */
 109
 110 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)
 111 {
 112         FILE *f;
 113         const char *error_message;
 114         char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;
 115         unsigned last_line_read;
 116
 117         if(0 == cs_filename || strlen(cs_filename) == 0) {
 118                 fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
 119                 return false;
 120         }
 121         if(0 == strcmp(cs_filename, "-"))
 122                 f = stdin;
 123         else
 124                 f = fopen(cs_filename, "r");
 125
 126         if(0 == f) {
 127                 fprintf(stderr, "%s: ERROR: can't open import file %s: %s\n", filename, cs_filename, strerror(errno));
 128                 return false;
 129         }
 130
 131         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, is_cdda, lead_out_offset);
 132
 133         if(f != stdin)
 134                 fclose(f);
 135
 136         if(0 == *cuesheet) {
 137                 fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);
 138                 return false;
 139         }
 140
 141         if(!FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/false, &error_message)) {
 142                 fprintf(stderr, "%s: ERROR parsing cuesheet \"%s\": %s\n", filename, cs_filename, error_message);
 143                 return false;
 144         }
 145
 146         /* if we're expecting CDDA, warn about non-compliance */
 147         if(is_cdda && !FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/true, &error_message)) {
 148                 fprintf(stderr, "%s: WARNING cuesheet \"%s\" is not audio CD compliant: %s\n", filename, cs_filename, error_message);
 149                 (*cuesheet)->data.cue_sheet.is_cd = false;
 150         }
 151
 152         /* add seekpoints for each index point if required */
 153         if(0 != seekpoint_specification) {
 154                 char spec[128];
 155                 unsigned track, index;
 156                 const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;
 157                 if(0 == *seekpoint_specification)
 158                         *seekpoint_specification = local_strdup("");
 159                 for(track = 0; track < cs->num_tracks; track++) {
 160                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;
 161                         for(index = 0; index < tr->num_indices; index++) {
 162 #ifdef _MSC_VER
 163                                 sprintf(spec, "%I64u;", tr->offset + tr->indices[index].offset);
 164 #else
 165                                 sprintf(spec, "%llu;", tr->offset + tr->indices[index].offset);
 166 #endif
 167                                 local_strcat(seekpoint_specification, spec);
 168                         }
 169                 }
 170         }
 171
 172         *needs_write = true;
 173         return true;
 174 }
 175
 176 FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)
 177 {
 178         FILE *f;
 179         char *ref = 0;
 180         size_t reflen;
 181
 182         if(0 == cs_filename || strlen(cs_filename) == 0) {
 183                 fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
 184                 return false;
 185         }
 186         if(0 == strcmp(cs_filename, "-"))
 187                 f = stdout;
 188         else
 189                 f = fopen(cs_filename, "w");
 190
 191         if(0 == f) {
 192                 fprintf(stderr, "%s: ERROR: can't open export file %s: %s\n", filename, cs_filename, strerror(errno));
 193                 return false;
 194         }
 195
 196         reflen = strlen(filename) + 7 + 1;
 197         if(0 == (ref = malloc(reflen))) {
 198                 fprintf(stderr, "%s: ERROR: allocating memory\n", filename);
 199                 return false;
 200         }
 201
 202 #if defined _MSC_VER || defined __MINGW32__
 203         _snprintf(ref, reflen, "\"%s\" FLAC", filename);
 204 #else
 205         snprintf(ref, reflen, "\"%s\" FLAC", filename);
 206 #endif
 207
 208         grabbag__cuesheet_emit(f, cuesheet, ref);
 209
 210         free(ref);
 211
 212         if(f != stdout)
 213                 fclose(f);
 214
 215         return true;
 216 }