src/metaflac/operations_shorthand_cuesheet.c

   1 /* metaflac - Command-line FLAC metadata editor
   2  * Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009  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 #if HAVE_INTTYPES_H
  25 #include <inttypes.h>
  26 #endif
  27 #include <stdio.h> /* for snprintf() */
  28 #include <string.h>
  29 #include "options.h"
  30 #include "utils.h"
  31 #include "FLAC/assert.h"
  32 #include "share/grabbag.h"
  33 #include "operations_shorthand.h"
  34
  35 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, unsigned sample_rate, FLAC__bool is_cdda, Argument_AddSeekpoint *add_seekpoint_link);
  36 static FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename);
  37
  38 FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
  39 {
  40         FLAC__bool ok = true;
  41         FLAC__StreamMetadata *cuesheet = 0;
  42         FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
  43         FLAC__uint64 lead_out_offset = 0;
  44         FLAC__bool is_cdda = false;
  45         unsigned sample_rate = 0;
  46
  47         if(0 == iterator)
  48                 die("out of memory allocating iterator");
  49
  50         FLAC__metadata_iterator_init(iterator, chain);
  51
  52         do {
  53                 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
  54                 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
  55                         lead_out_offset = block->data.stream_info.total_samples;
  56                         if(lead_out_offset == 0) {
  57                                 fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);
  58                                 FLAC__metadata_iterator_delete(iterator);
  59                                 return false;
  60                         }
  61                         sample_rate = block->data.stream_info.sample_rate;
  62                         is_cdda = (block->data.stream_info.channels == 1 || block->data.stream_info.channels == 2) && (block->data.stream_info.bits_per_sample == 16) && (sample_rate == 44100);
  63                 }
  64                 else if(block->type == FLAC__METADATA_TYPE_CUESHEET)
  65                         cuesheet = block;
  66         } while(FLAC__metadata_iterator_next(iterator));
  67
  68         if(lead_out_offset == 0) {
  69                 fprintf(stderr, "%s: ERROR: FLAC stream has no STREAMINFO block\n", filename);
  70                 FLAC__metadata_iterator_delete(iterator);
  71                 return false;
  72         }
  73
  74         switch(operation->type) {
  75                 case OP__IMPORT_CUESHEET_FROM:
  76                         if(0 != cuesheet) {
  77                                 fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
  78                                 ok = false;
  79                         }
  80                         else {
  81                                 ok = import_cs_from(filename, &cuesheet, operation->argument.import_cuesheet_from.filename, needs_write, lead_out_offset, sample_rate, is_cdda, operation->argument.import_cuesheet_from.add_seekpoint_link);
  82                                 if(ok) {
  83                                         /* append CUESHEET block */
  84                                         while(FLAC__metadata_iterator_next(iterator))
  85                                                 ;
  86                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
  87                                                 print_error_with_chain_status(chain, "%s: ERROR: adding new CUESHEET block to metadata", filename);
  88                                                 FLAC__metadata_object_delete(cuesheet);
  89                                                 ok = false;
  90                                         }
  91                                 }
  92                         }
  93                         break;
  94                 case OP__EXPORT_CUESHEET_TO:
  95                         if(0 == cuesheet) {
  96                                 fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
  97                                 ok = false;
  98                         }
  99                         else
 100                                 ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);
 101                         break;
 102                 default:
 103                         ok = false;
 104                         FLAC__ASSERT(0);
 105                         break;
 106         };
 107
 108         FLAC__metadata_iterator_delete(iterator);
 109         return ok;
 110 }
 111
 112 /*
 113  * local routines
 114  */
 115
 116 FLAC__bool import_cs_from(const char *filename, FLAC__StreamMetadata **cuesheet, const char *cs_filename, FLAC__bool *needs_write, FLAC__uint64 lead_out_offset, unsigned sample_rate, FLAC__bool is_cdda, Argument_AddSeekpoint *add_seekpoint_link)
 117 {
 118         FILE *f;
 119         const char *error_message;
 120         char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;
 121         unsigned last_line_read;
 122
 123         if(0 == cs_filename || strlen(cs_filename) == 0) {
 124                 fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
 125                 return false;
 126         }
 127         if(0 == strcmp(cs_filename, "-"))
 128                 f = stdin;
 129         else
 130                 f = fopen(cs_filename, "r");
 131
 132         if(0 == f) {
 133                 fprintf(stderr, "%s: ERROR: can't open import file %s: %s\n", filename, cs_filename, strerror(errno));
 134                 return false;
 135         }
 136
 137         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, sample_rate, is_cdda, lead_out_offset);
 138
 139         if(f != stdin)
 140                 fclose(f);
 141
 142         if(0 == *cuesheet) {
 143                 fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);
 144                 return false;
 145         }
 146
 147         if(!FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/false, &error_message)) {
 148                 fprintf(stderr, "%s: ERROR parsing cuesheet \"%s\": %s\n", filename, cs_filename, error_message);
 149                 return false;
 150         }
 151
 152         /* if we're expecting CDDA, warn about non-compliance */
 153         if(is_cdda && !FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/true, &error_message)) {
 154                 fprintf(stderr, "%s: WARNING cuesheet \"%s\" is not audio CD compliant: %s\n", filename, cs_filename, error_message);
 155                 (*cuesheet)->data.cue_sheet.is_cd = false;
 156         }
 157
 158         /* add seekpoints for each index point if required */
 159         if(0 != seekpoint_specification) {
 160                 char spec[128];
 161                 unsigned track, index;
 162                 const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;
 163                 if(0 == *seekpoint_specification)
 164                         *seekpoint_specification = local_strdup("");
 165                 for(track = 0; track < cs->num_tracks; track++) {
 166                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;
 167                         for(index = 0; index < tr->num_indices; index++) {
 168                                 sprintf(spec, "%" PRIu64 "u;", (tr->offset + tr->indices[index].offset));
 169                                 local_strcat(seekpoint_specification, spec);
 170                         }
 171                 }
 172         }
 173
 174         *needs_write = true;
 175         return true;
 176 }
 177
 178 FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)
 179 {
 180         FILE *f;
 181         char *ref = 0;
 182         size_t reflen;
 183
 184         if(0 == cs_filename || strlen(cs_filename) == 0) {
 185                 fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
 186                 return false;
 187         }
 188         if(0 == strcmp(cs_filename, "-"))
 189                 f = stdout;
 190         else
 191                 f = fopen(cs_filename, "w");
 192
 193         if(0 == f) {
 194                 fprintf(stderr, "%s: ERROR: can't open export file %s: %s\n", filename, cs_filename, strerror(errno));
 195                 return false;
 196         }
 197
 198         reflen = strlen(filename) + 7 + 1;
 199         if(0 == (ref = malloc(reflen))) {
 200                 fprintf(stderr, "%s: ERROR: allocating memory\n", filename);
 201                 return false;
 202         }
 203
 204 #if defined _MSC_VER || defined __MINGW32__
 205         _snprintf(ref, reflen, "\"%s\" FLAC", filename);
 206 #else
 207         snprintf(ref, reflen, "\"%s\" FLAC", filename);
 208 #endif
 209
 210         grabbag__cuesheet_emit(f, cuesheet, ref);
 211
 212         free(ref);
 213
 214         if(f != stdout)
 215                 fclose(f);
 216
 217         return true;
 218 }