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 along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #if HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22
  23 #include <errno.h>
  24 #include <string.h>
  25 #include "options.h"
  26 #include "utils.h"
  27 #include "FLAC/assert.h"
  28 #include "share/grabbag.h"
  29 #include "share/compat.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, unsigned sample_rate, 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         unsigned sample_rate = 0;
  43
  44         if(0 == iterator)
  45                 die("out of memory allocating iterator");
  46
  47         FLAC__metadata_iterator_init(iterator, chain);
  48
  49         do {
  50                 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
  51                 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
  52                         lead_out_offset = block->data.stream_info.total_samples;
  53                         if(lead_out_offset == 0) {
  54                                 flac_fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);
  55                                 FLAC__metadata_iterator_delete(iterator);
  56                                 return false;
  57                         }
  58                         sample_rate = block->data.stream_info.sample_rate;
  59                         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);
  60                 }
  61                 else if(block->type == FLAC__METADATA_TYPE_CUESHEET)
  62                         cuesheet = block;
  63         } while(FLAC__metadata_iterator_next(iterator));
  64
  65         if(lead_out_offset == 0) {
  66                 flac_fprintf(stderr, "%s: ERROR: FLAC stream has no STREAMINFO block\n", filename);
  67                 FLAC__metadata_iterator_delete(iterator);
  68                 return false;
  69         }
  70
  71         switch(operation->type) {
  72                 case OP__IMPORT_CUESHEET_FROM:
  73                         if(0 != cuesheet) {
  74                                 flac_fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
  75                                 ok = false;
  76                         }
  77                         else {
  78                                 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);
  79                                 if(ok) {
  80                                         /* append CUESHEET block */
  81                                         while(FLAC__metadata_iterator_next(iterator))
  82                                                 ;
  83                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
  84                                                 print_error_with_chain_status(chain, "%s: ERROR: adding new CUESHEET block to metadata", filename);
  85                                                 FLAC__metadata_object_delete(cuesheet);
  86                                                 ok = false;
  87                                         }
  88                                 }
  89                         }
  90                         break;
  91                 case OP__EXPORT_CUESHEET_TO:
  92                         if(0 == cuesheet) {
  93                                 flac_fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
  94                                 ok = false;
  95                         }
  96                         else
  97                                 ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);
  98                         break;
  99                 default:
 100                         ok = false;
 101                         FLAC__ASSERT(0);
 102                         break;
 103         };
 104
 105         FLAC__metadata_iterator_delete(iterator);
 106         return ok;
 107 }
 108
 109 /*
 110  * local routines
 111  */
 112
 113 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)
 114 {
 115         FILE *f;
 116         const char *error_message;
 117         char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;
 118         unsigned last_line_read;
 119
 120         if(0 == cs_filename || strlen(cs_filename) == 0) {
 121                 flac_fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
 122                 return false;
 123         }
 124         if(0 == strcmp(cs_filename, "-"))
 125                 f = stdin;
 126         else
 127                 f = flac_fopen(cs_filename, "r");
 128
 129         if(0 == f) {
 130                 flac_fprintf(stderr, "%s: ERROR: can't open import file %s: %s\n", filename, cs_filename, strerror(errno));
 131                 return false;
 132         }
 133
 134         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, sample_rate, is_cdda, lead_out_offset);
 135
 136         if(f != stdin)
 137                 fclose(f);
 138
 139         if(0 == *cuesheet) {
 140                 flac_fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);
 141                 return false;
 142         }
 143
 144         if(!FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/false, &error_message)) {
 145                 flac_fprintf(stderr, "%s: ERROR parsing cuesheet \"%s\": %s\n", filename, cs_filename, error_message);
 146                 return false;
 147         }
 148
 149         /* if we're expecting CDDA, warn about non-compliance */
 150         if(is_cdda && !FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/true, &error_message)) {
 151                 flac_fprintf(stderr, "%s: WARNING cuesheet \"%s\" is not audio CD compliant: %s\n", filename, cs_filename, error_message);
 152                 (*cuesheet)->data.cue_sheet.is_cd = false;
 153         }
 154
 155         /* add seekpoints for each index point if required */
 156         if(0 != seekpoint_specification) {
 157                 char spec[128];
 158                 unsigned track, index;
 159                 const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;
 160                 if(0 == *seekpoint_specification)
 161                         *seekpoint_specification = local_strdup("");
 162                 for(track = 0; track < cs->num_tracks; track++) {
 163                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;
 164                         for(index = 0; index < tr->num_indices; index++) {
 165                                 flac_snprintf(spec, sizeof (spec), "%" PRIu64 ";", (tr->offset + tr->indices[index].offset));
 166                                 local_strcat(seekpoint_specification, spec);
 167                         }
 168                 }
 169         }
 170
 171         *needs_write = true;
 172         return true;
 173 }
 174
 175 FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)
 176 {
 177         FILE *f;
 178         char *ref = 0;
 179         size_t reflen;
 180
 181         if(0 == cs_filename || strlen(cs_filename) == 0) {
 182                 flac_fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
 183                 return false;
 184         }
 185         if(0 == strcmp(cs_filename, "-"))
 186                 f = stdout;
 187         else
 188                 f = flac_fopen(cs_filename, "w");
 189
 190         if(0 == f) {
 191                 flac_fprintf(stderr, "%s: ERROR: can't open export file %s: %s\n", filename, cs_filename, strerror(errno));
 192                 return false;
 193         }
 194
 195         reflen = strlen(filename) + 7 + 1;
 196         if(0 == (ref = malloc(reflen))) {
 197                 flac_fprintf(stderr, "%s: ERROR: allocating memory\n", filename);
 198                 if(f != stdout)
 199                         fclose(f);
 200                 return false;
 201         }
 202
 203         flac_snprintf(ref, reflen, "\"%s\" FLAC", filename);
 204
 205         grabbag__cuesheet_emit(f, cuesheet, ref);
 206
 207         free(ref);
 208
 209         if(f != stdout)
 210                 fclose(f);
 211
 212         return true;
 213 }