e508ae3736062cbbf24ebd178723992d542e3047
[flac.git] / src / metaflac / operations_shorthand_cuesheet.c
1 /* metaflac - Command-line FLAC metadata editor
2  * Copyright (C) 2001-2009  Josh Coalson
3  * Copyright (C) 2011-2014  Xiph.Org Foundation
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * as published by the Free Software Foundation; either version 2
8  * of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19
20 #ifdef HAVE_CONFIG_H
21 #  include <config.h>
22 #endif
23
24 #include <errno.h>
25 #include <string.h>
26 #include "options.h"
27 #include "utils.h"
28 #include "FLAC/assert.h"
29 #include "share/grabbag.h"
30 #include "share/compat.h"
31 #include "operations_shorthand.h"
32
33 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);
34 static FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename);
35
36 FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
37 {
38         FLAC__bool ok = true;
39         FLAC__StreamMetadata *cuesheet = 0;
40         FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
41         FLAC__uint64 lead_out_offset = 0;
42         FLAC__bool is_cdda = false;
43         unsigned sample_rate = 0;
44
45         if(0 == iterator)
46                 die("out of memory allocating iterator");
47
48         FLAC__metadata_iterator_init(iterator, chain);
49
50         do {
51                 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
52                 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
53                         lead_out_offset = block->data.stream_info.total_samples;
54                         if(lead_out_offset == 0) {
55                                 flac_fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);
56                                 FLAC__metadata_iterator_delete(iterator);
57                                 return false;
58                         }
59                         sample_rate = block->data.stream_info.sample_rate;
60                         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);
61                 }
62                 else if(block->type == FLAC__METADATA_TYPE_CUESHEET)
63                         cuesheet = block;
64         } while(FLAC__metadata_iterator_next(iterator));
65
66         if(lead_out_offset == 0) {
67                 flac_fprintf(stderr, "%s: ERROR: FLAC stream has no STREAMINFO block\n", filename);
68                 FLAC__metadata_iterator_delete(iterator);
69                 return false;
70         }
71
72         switch(operation->type) {
73                 case OP__IMPORT_CUESHEET_FROM:
74                         if(0 != cuesheet) {
75                                 flac_fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);
76                                 ok = false;
77                         }
78                         else {
79                                 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);
80                                 if(ok) {
81                                         /* append CUESHEET block */
82                                         while(FLAC__metadata_iterator_next(iterator))
83                                                 ;
84                                         if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {
85                                                 print_error_with_chain_status(chain, "%s: ERROR: adding new CUESHEET block to metadata", filename);
86                                                 FLAC__metadata_object_delete(cuesheet);
87                                                 ok = false;
88                                         }
89                                 }
90                         }
91                         break;
92                 case OP__EXPORT_CUESHEET_TO:
93                         if(0 == cuesheet) {
94                                 flac_fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);
95                                 ok = false;
96                         }
97                         else
98                                 ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);
99                         break;
100                 default:
101                         ok = false;
102                         FLAC__ASSERT(0);
103                         break;
104         };
105
106         FLAC__metadata_iterator_delete(iterator);
107         return ok;
108 }
109
110 /*
111  * local routines
112  */
113
114 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)
115 {
116         FILE *f;
117         const char *error_message;
118         char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;
119         unsigned last_line_read;
120
121         if(0 == cs_filename || strlen(cs_filename) == 0) {
122                 flac_fprintf(stderr, "%s: ERROR: empty import file name\n", filename);
123                 return false;
124         }
125         if(0 == strcmp(cs_filename, "-"))
126                 f = stdin;
127         else
128                 f = flac_fopen(cs_filename, "r");
129
130         if(0 == f) {
131                 flac_fprintf(stderr, "%s: ERROR: can't open import file %s: %s\n", filename, cs_filename, strerror(errno));
132                 return false;
133         }
134
135         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, sample_rate, is_cdda, lead_out_offset);
136
137         if(f != stdin)
138                 fclose(f);
139
140         if(0 == *cuesheet) {
141                 flac_fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);
142                 return false;
143         }
144
145         if(!FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/false, &error_message)) {
146                 flac_fprintf(stderr, "%s: ERROR parsing cuesheet \"%s\": %s\n", filename, cs_filename, error_message);
147                 return false;
148         }
149
150         /* if we're expecting CDDA, warn about non-compliance */
151         if(is_cdda && !FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/true, &error_message)) {
152                 flac_fprintf(stderr, "%s: WARNING cuesheet \"%s\" is not audio CD compliant: %s\n", filename, cs_filename, error_message);
153                 (*cuesheet)->data.cue_sheet.is_cd = false;
154         }
155
156         /* add seekpoints for each index point if required */
157         if(0 != seekpoint_specification) {
158                 char spec[128];
159                 unsigned track, indx;
160                 const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;
161                 if(0 == *seekpoint_specification)
162                         *seekpoint_specification = local_strdup("");
163                 for(track = 0; track < cs->num_tracks; track++) {
164                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;
165                         for(indx = 0; indx < tr->num_indices; indx++) {
166                                 flac_snprintf(spec, sizeof (spec), "%" PRIu64 ";", (tr->offset + tr->indices[indx].offset));
167                                 local_strcat(seekpoint_specification, spec);
168                         }
169                 }
170         }
171
172         *needs_write = true;
173         return true;
174 }
175
176 FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)
177 {
178         FILE *f;
179         char *ref = 0;
180         size_t reflen;
181
182         if(0 == cs_filename || strlen(cs_filename) == 0) {
183                 flac_fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
184                 return false;
185         }
186         if(0 == strcmp(cs_filename, "-"))
187                 f = stdout;
188         else
189                 f = flac_fopen(cs_filename, "w");
190
191         if(0 == f) {
192                 flac_fprintf(stderr, "%s: ERROR: can't open export file %s: %s\n", filename, cs_filename, strerror(errno));
193                 return false;
194         }
195
196         reflen = strlen(filename) + 7 + 1;
197         if(0 == (ref = malloc(reflen))) {
198                 flac_fprintf(stderr, "%s: ERROR: allocating memory\n", filename);
199                 if(f != stdout)
200                         fclose(f);
201                 return false;
202         }
203
204         flac_snprintf(ref, reflen, "\"%s\" FLAC", filename);
205
206         grabbag__cuesheet_emit(f, cuesheet, ref);
207
208         free(ref);
209
210         if(f != stdout)
211                 fclose(f);
212
213         return true;
214 }