src/metaflac/operations_shorthand_cuesheet.c

   1 /* metaflac - Command-line FLAC metadata editor
   2  * Copyright (C) 2001,2002  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, 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;
  34
  35         if(0 == iterator)
  36                 die("out of memory allocating iterator");
  37
  38         FLAC__metadata_iterator_init(iterator, chain);
  39
  40         do {
  41                 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
  42                 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
  43                         lead_out_offset = block->data.stream_info.total_samples;
  44                         if(lead_out_offset == 0) {
  45                                 fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);
  46                                 FLAC__metadata_iterator_delete(iterator);
  47                                 return false;
  48                         }
  49                         if(block->data.stream_info.sample_rate != 44100) {
  50                                 fprintf(stderr, "%s: ERROR: FLAC stream must currently be 44.1kHz in order to import/export cuesheet\n", filename);
  51                                 FLAC__metadata_iterator_delete(iterator);
  52                                 return false;
  53                         }
  54                 }
  55                 else if(block->type == FLAC__METADATA_TYPE_CUESHEET)
  56                         cuesheet = block;
  57         } while(FLAC__metadata_iterator_next(iterator));
  58
  59         switch(operation->type) {
  60                 case OP__IMPORT_CUESHEET_FROM:
  61                         if(0 != cuesheet) {
  62                                 fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
  63                                 ok = false;
  64                         }
  65                         else {
  66                                 ok = import_cs_from(filename, &cuesheet, operation->argument.import_cuesheet_from.filename, needs_write, lead_out_offset, operation->argument.import_cuesheet_from.add_seekpoint_link);
  67                                 if(ok) {
  68                                         /* append CUESHEET block */
  69                                         while(FLAC__metadata_iterator_next(iterator))
  70                                                 ;
  71                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
  72                                                 fprintf(stderr, "%s: ERROR: adding new CUESHEET block to metadata, status =\"%s\"\n", filename, FLAC__Metadata_ChainStatusString[FLAC__metadata_chain_status(chain)]);
  73                                                 FLAC__metadata_object_delete(cuesheet);
  74                                                 ok = false;
  75                                         }
  76                                 }
  77                         }
  78                         break;
  79                 case OP__EXPORT_CUESHEET_TO:
  80                         if(0 == cuesheet) {
  81                                 fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
  82                                 ok = false;
  83                         }
  84                         else
  85                                 ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);
  86                         break;
  87                 default:
  88                         ok = false;
  89                         FLAC__ASSERT(0);
  90                         break;
  91         };
  92
  93         FLAC__metadata_iterator_delete(iterator);
  94         return ok;
  95 }
  96
  97 /*
  98  * local routines
  99  */
 100
 101 FLAC__bool import_cs_from(const char *filename, FLAC__StreamMetadata **cuesheet, const char *cs_filename, FLAC__bool *needs_write, FLAC__uint64 lead_out_offset, Argument_AddSeekpoint *add_seekpoint_link)
 102 {
 103         FILE *f;
 104         const char *error_message;
 105         char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;
 106         unsigned last_line_read;
 107
 108         if(0 == cs_filename || strlen(cs_filename) == 0) {
 109                 fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
 110                 return false;
 111         }
 112         if(0 == strcmp(cs_filename, "-"))
 113                 f = stdin;
 114         else
 115                 f = fopen(cs_filename, "r");
 116
 117         if(0 == f) {
 118                 fprintf(stderr, "%s: ERROR: can't open import file %s\n", filename, cs_filename);
 119                 return false;
 120         }
 121
 122         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, /*@@@@is_cdda=*/true, lead_out_offset);
 123
 124         if(f != stdin)
 125                 fclose(f);
 126
 127         if(0 == *cuesheet) {
 128                 fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);
 129                 return false;
 130         }
 131
 132         /* add seekpoints for each index point if required */
 133         if(0 != seekpoint_specification) {
 134                 char spec[128];
 135                 unsigned track, index;
 136                 const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;
 137                 if(0 == *seekpoint_specification)
 138                         *seekpoint_specification = local_strdup("");
 139                 for(track = 0; track < cs->num_tracks; track++) {
 140                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;
 141                         for(index = 0; index < tr->num_indices; index++) {
 142                                 sprintf(spec, "%llu;", tr->offset + tr->indices[index].offset);
 143                                 local_strcat(seekpoint_specification, spec);
 144                         }
 145                 }
 146         }
 147
 148         *needs_write = true;
 149         return true;
 150 }
 151
 152 FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)
 153 {
 154         FILE *f;
 155
 156         if(0 == cs_filename || strlen(cs_filename) == 0) {
 157                 fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
 158                 return false;
 159         }
 160         if(0 == strcmp(cs_filename, "-"))
 161                 f = stdout;
 162         else
 163                 f = fopen(cs_filename, "w");
 164
 165         if(0 == f) {
 166                 fprintf(stderr, "%s: ERROR: can't open export file %s\n", filename, cs_filename);
 167                 return false;
 168         }
 169
 170         grabbag__cuesheet_emit(f, cuesheet, "\"dummy.wav\" WAVE");
 171
 172         if(f != stdout)
 173                 fclose(f);
 174
 175         return true;
 176 }