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 Argument_Filename *cs_filename, FLAC__bool *needs_write, FLAC__uint64 lead_out_offset, FLAC__StreamMetadata *seektable);
  26 static FLAC__bool export_cs_to(const char *filename, FLAC__StreamMetadata *cuesheet, const Argument_Filename *cs_filename);
  27
  28 FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write, FLAC__bool cued_seekpoints)
  29 {
  30         FLAC__bool ok = true;
  31         FLAC__StreamMetadata *cuesheet = 0, *seektable = 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                 else if(block->type == FLAC__METADATA_TYPE_SEEKTABLE)
  58                         seektable = block;
  59         } while(FLAC__metadata_iterator_next(iterator));
  60
  61         switch(operation->type) {
  62                 case OP__IMPORT_CUESHEET_FROM:
  63                         if(0 != cuesheet) {
  64                                 fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
  65                                 ok = false;
  66                         }
  67                         else {
  68                                 /* create a new SEEKTABLE block if necessary */
  69                                 if(cued_seekpoints && 0 == seektable) {
  70                                         seektable = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE);
  71                                         if(0 == seektable)
  72                                                 die("out of memory allocating SEEKTABLE block");
  73                                         while(FLAC__metadata_iterator_prev(iterator))
  74                                                 ;
  75                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, seektable)) {
  76                                                 fprintf(stderr, "%s: ERROR: adding new SEEKTABLE block to metadata, status =\"%s\"\n", filename, FLAC__Metadata_ChainStatusString[FLAC__metadata_chain_status(chain)]);
  77                                                 FLAC__metadata_object_delete(seektable);
  78                                                 FLAC__metadata_object_delete(cuesheet);
  79                                                 ok = false;
  80                                         }
  81                                 }
  82                                 else
  83                                         seektable = 0;
  84                                 ok = import_cs_from(filename, &cuesheet, &operation->argument.filename, needs_write, lead_out_offset, seektable);
  85                                 if(!ok && 0 != seektable)
  86                                         FLAC__metadata_object_delete(seektable);
  87                                 else {
  88                                         /* append CUESHEET block */
  89                                         while(FLAC__metadata_iterator_next(iterator))
  90                                                 ;
  91                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
  92                                                 fprintf(stderr, "%s: ERROR: adding new CUESHEET block to metadata, status =\"%s\"\n", filename, FLAC__Metadata_ChainStatusString[FLAC__metadata_chain_status(chain)]);
  93                                                 FLAC__metadata_object_delete(cuesheet);
  94                                                 ok = false;
  95                                         }
  96                                 }
  97                         }
  98                         break;
  99                 case OP__EXPORT_CUESHEET_TO:
 100                         if(0 == cuesheet) {
 101                                 fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
 102                                 ok = false;
 103                         }
 104                         else
 105                                 ok = export_cs_to(filename, cuesheet, &operation->argument.filename);
 106                         break;
 107                 default:
 108                         ok = false;
 109                         FLAC__ASSERT(0);
 110                         break;
 111         };
 112
 113         FLAC__metadata_iterator_delete(iterator);
 114         return ok;
 115 }
 116
 117 /*
 118  * local routines
 119  */
 120
 121 FLAC__bool import_cs_from(const char *filename, FLAC__StreamMetadata **cuesheet, const Argument_Filename *cs_filename, FLAC__bool *needs_write, FLAC__uint64 lead_out_offset, FLAC__StreamMetadata *seektable)
 122 {
 123         FILE *f;
 124         const char *error_message;
 125         unsigned last_line_read;
 126
 127         if(0 == cs_filename->value || strlen(cs_filename->value) == 0) {
 128                 fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
 129                 return false;
 130         }
 131         if(0 == strcmp(cs_filename->value, "-"))
 132                 f = stdin;
 133         else
 134                 f = fopen(cs_filename->value, "r");
 135
 136         if(0 == f) {
 137                 fprintf(stderr, "%s: ERROR: can't open import file %s\n", filename, cs_filename->value);
 138                 return false;
 139         }
 140
 141         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, /*is_cdda=*/true, lead_out_offset);
 142
 143         if(f != stdin)
 144                 fclose(f);
 145
 146         if(0 == *cuesheet) {
 147                 fprintf(stderr, "%s: ERROR: while parsing cuesheet, line %u, %s\n", filename, last_line_read, error_message);
 148                 return false;
 149         }
 150
 151         /* add seekpoints for each index point if required */
 152         if(0 != seektable) {
 153                 //@@@@
 154         }
 155
 156         *needs_write = true;
 157         return true;
 158 }
 159
 160 FLAC__bool export_cs_to(const char *filename, FLAC__StreamMetadata *cuesheet, const Argument_Filename *cs_filename)
 161 {
 162         FILE *f;
 163
 164         if(0 == cs_filename->value || strlen(cs_filename->value) == 0) {
 165                 fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
 166                 return false;
 167         }
 168         if(0 == strcmp(cs_filename->value, "-"))
 169                 f = stdout;
 170         else
 171                 f = fopen(cs_filename->value, "w");
 172
 173         if(0 == f) {
 174                 fprintf(stderr, "%s: ERROR: can't open export file %s\n", filename, cs_filename->value);
 175                 return false;
 176         }
 177
 178         grabbag__cuesheet_emit(f, cuesheet, "DUMMY.WAV", /*is_cdda=*/true);
 179
 180         if(f != stdout)
 181                 fclose(f);
 182
 183         return true;
 184 }