src/metaflac/operations_shorthand_cuesheet.c

   1 /* metaflac - Command-line FLAC metadata editor
   2  * Copyright (C) 2001,2002,2003,2004,2005  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 #include "options.h"
  20 #include "utils.h"
  21 #include "FLAC/assert.h"
  22 #include "share/grabbag.h"
  23 #include <string.h>
  24
  25 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);
  26 static FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename);
  27
  28 FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
  29 {
  30         FLAC__bool ok = true;
  31         FLAC__StreamMetadata *cuesheet = 0;
  32         FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
  33         FLAC__uint64 lead_out_offset = 0;
  34         FLAC__bool is_cdda = false;
  35
  36         if(0 == iterator)
  37                 die("out of memory allocating iterator");
  38
  39         FLAC__metadata_iterator_init(iterator, chain);
  40
  41         do {
  42                 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
  43                 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
  44                         lead_out_offset = block->data.stream_info.total_samples;
  45                         if(lead_out_offset == 0) {
  46                                 fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);
  47                                 FLAC__metadata_iterator_delete(iterator);
  48                                 return false;
  49                         }
  50                         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);
  51                 }
  52                 else if(block->type == FLAC__METADATA_TYPE_CUESHEET)
  53                         cuesheet = block;
  54         } while(FLAC__metadata_iterator_next(iterator));
  55
  56         if(lead_out_offset == 0) {
  57                 fprintf(stderr, "%s: ERROR: FLAC stream has no STREAMINFO block\n", filename);
  58                 FLAC__metadata_iterator_delete(iterator);
  59                 return false;
  60         }
  61
  62         switch(operation->type) {
  63                 case OP__IMPORT_CUESHEET_FROM:
  64                         if(0 != cuesheet) {
  65                                 fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
  66                                 ok = false;
  67                         }
  68                         else {
  69                                 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);
  70                                 if(ok) {
  71                                         /* append CUESHEET block */
  72                                         while(FLAC__metadata_iterator_next(iterator))
  73                                                 ;
  74                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
  75                                                 print_error_with_chain_status(chain, "%s: ERROR: adding new CUESHEET block to metadata", filename);
  76                                                 FLAC__metadata_object_delete(cuesheet);
  77                                                 ok = false;
  78                                         }
  79                                 }
  80                         }
  81                         break;
  82                 case OP__EXPORT_CUESHEET_TO:
  83                         if(0 == cuesheet) {
  84                                 fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
  85                                 ok = false;
  86                         }
  87                         else
  88                                 ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);
  89                         break;
  90                 default:
  91                         ok = false;
  92                         FLAC__ASSERT(0);
  93                         break;
  94         };
  95
  96         FLAC__metadata_iterator_delete(iterator);
  97         return ok;
  98 }
  99
 100 /*
 101  * local routines
 102  */
 103
 104 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)
 105 {
 106         FILE *f;
 107         const char *error_message;
 108         char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;
 109         unsigned last_line_read;
 110
 111         if(0 == cs_filename || strlen(cs_filename) == 0) {
 112                 fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
 113                 return false;
 114         }
 115         if(0 == strcmp(cs_filename, "-"))
 116                 f = stdin;
 117         else
 118                 f = fopen(cs_filename, "r");
 119
 120         if(0 == f) {
 121                 fprintf(stderr, "%s: ERROR: can't open import file %s\n", filename, cs_filename);
 122                 return false;
 123         }
 124
 125         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, is_cdda, lead_out_offset);
 126
 127         if(f != stdin)
 128                 fclose(f);
 129
 130         if(0 == *cuesheet) {
 131                 fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);
 132                 return false;
 133         }
 134
 135         /* add seekpoints for each index point if required */
 136         if(0 != seekpoint_specification) {
 137                 char spec[128];
 138                 unsigned track, index;
 139                 const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;
 140                 if(0 == *seekpoint_specification)
 141                         *seekpoint_specification = local_strdup("");
 142                 for(track = 0; track < cs->num_tracks; track++) {
 143                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;
 144                         for(index = 0; index < tr->num_indices; index++) {
 145 #ifdef _MSC_VER
 146                                 sprintf(spec, "%I64u;", tr->offset + tr->indices[index].offset);
 147 #else
 148                                 sprintf(spec, "%llu;", tr->offset + tr->indices[index].offset);
 149 #endif
 150                                 local_strcat(seekpoint_specification, spec);
 151                         }
 152                 }
 153         }
 154
 155         *needs_write = true;
 156         return true;
 157 }
 158
 159 FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)
 160 {
 161         FILE *f;
 162
 163         if(0 == cs_filename || strlen(cs_filename) == 0) {
 164                 fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
 165                 return false;
 166         }
 167         if(0 == strcmp(cs_filename, "-"))
 168                 f = stdout;
 169         else
 170                 f = fopen(cs_filename, "w");
 171
 172         if(0 == f) {
 173                 fprintf(stderr, "%s: ERROR: can't open export file %s\n", filename, cs_filename);
 174                 return false;
 175         }
 176
 177         grabbag__cuesheet_emit(f, cuesheet, "\"dummy.wav\" WAVE");
 178
 179         if(f != stdout)
 180                 fclose(f);
 181
 182         return true;
 183 }