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/* metaflac - Command-line FLAC metadata editor

 * Copyright (C) 2001,2002,2003  Josh Coalson

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */

 

#include "options.h"

#include "utils.h"

#include "FLAC/assert.h"

#include "share/grabbag.h"

#include <string.h>

 

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);

static FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename);

 

FLAC__bool do_shorthand_operation__cuesheet(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)

{

        FLAC__bool ok = true;

        FLAC__StreamMetadata *cuesheet = 0;

        FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();

        FLAC__uint64 lead_out_offset;

 

        if(0 == iterator)

                die("out of memory allocating iterator");

 

        FLAC__metadata_iterator_init(iterator, chain);

 

        do {

                FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);

                if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {

                        lead_out_offset = block->data.stream_info.total_samples;

                        if(lead_out_offset == 0) {

                                fprintf(stderr, "%s: ERROR: FLAC file must have total_samples set in STREAMINFO in order to import/export cuesheet\n", filename);

                                FLAC__metadata_iterator_delete(iterator);

                                return false;

                        }

                        if(block->data.stream_info.sample_rate != 44100) {

                                fprintf(stderr, "%s: ERROR: FLAC stream must currently be 44.1kHz in order to import/export cuesheet\n", filename);

                                FLAC__metadata_iterator_delete(iterator);

                                return false;

                        }

                }

                else if(block->type == FLAC__METADATA_TYPE_CUESHEET)

                        cuesheet = block;

        } while(FLAC__metadata_iterator_next(iterator));

 

        switch(operation->type) {

                case OP__IMPORT_CUESHEET_FROM:

                        if(0 != cuesheet) {

                                fprintf(stderr, "%s: ERROR: FLAC file already has CUESHEET block\n", filename);

                                ok = false;

                        }

                        else {

                                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);

                                if(ok) {

                                        /* append CUESHEET block */

                                        while(FLAC__metadata_iterator_next(iterator))

                                                ;

                                        if(!FLAC__metadata_iterator_insert_block_after(iterator, cuesheet)) {

                                                fprintf(stderr, "%s: ERROR: adding new CUESHEET block to metadata, status =\"%s\"\n", filename, FLAC__Metadata_ChainStatusString[FLAC__metadata_chain_status(chain)]);

                                                FLAC__metadata_object_delete(cuesheet);

                                                ok = false;

                                        }

                                }

                        }

                        break;

                case OP__EXPORT_CUESHEET_TO:

                        if(0 == cuesheet) {

                                fprintf(stderr, "%s: ERROR: FLAC file has no CUESHEET block\n", filename);

                                ok = false;

                        }

                        else

                                ok = export_cs_to(filename, cuesheet, operation->argument.filename.value);

                        break;

                default:

                        ok = false;

                        FLAC__ASSERT(0);

                        break;

        };

 

        FLAC__metadata_iterator_delete(iterator);

        return ok;

}

 

/*

 * local routines

 */

 

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)

{

        FILE *f;

        const char *error_message;

        char **seekpoint_specification = add_seekpoint_link? &(add_seekpoint_link->specification) : 0;

        unsigned last_line_read;

 

        if(0 == cs_filename || strlen(cs_filename) == 0) {

                fprintf(stderr, "%s: ERROR: empty import file name\n", filename);

                return false;

        }

        if(0 == strcmp(cs_filename, "-"))

                f = stdin;

        else

                f = fopen(cs_filename, "r");

 

        if(0 == f) {

                fprintf(stderr, "%s: ERROR: can't open import file %s\n", filename, cs_filename);

                return false;

        }

 

        *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, /*@@@is_cdda=*/true, lead_out_offset);

 

        if(f != stdin)

                fclose(f);

 

        if(0 == *cuesheet) {

                fprintf(stderr, "%s: ERROR: while parsing cuesheet \"%s\" on line %u: %s\n", filename, cs_filename, last_line_read, error_message);

                return false;

        }

 

        /* add seekpoints for each index point if required */

        if(0 != seekpoint_specification) {

                char spec[128];

                unsigned track, index;

                const FLAC__StreamMetadata_CueSheet *cs = &(*cuesheet)->data.cue_sheet;

                if(0 == *seekpoint_specification)

                        *seekpoint_specification = local_strdup("");

                for(track = 0; track < cs->num_tracks; track++) {

                        const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+track;

                        for(index = 0; index < tr->num_indices; index++) {

                                sprintf(spec, "%llu;", tr->offset + tr->indices[index].offset);

                                local_strcat(seekpoint_specification, spec);

                        }

                }

        }

 

        *needs_write = true;

        return true;

}

 

FLAC__bool export_cs_to(const char *filename, const FLAC__StreamMetadata *cuesheet, const char *cs_filename)

{

        FILE *f;

 

        if(0 == cs_filename || strlen(cs_filename) == 0) {

                fprintf(stderr, "%s: ERROR: empty export file name\n", filename);

                return false;

        }

        if(0 == strcmp(cs_filename, "-"))

                f = stdout;

        else

                f = fopen(cs_filename, "w");

 

        if(0 == f) {

                fprintf(stderr, "%s: ERROR: can't open export file %s\n", filename, cs_filename);

                return false;

        }

 

        grabbag__cuesheet_emit(f, cuesheet, "\"dummy.wav\" WAVE");

 

        if(f != stdout)

                fclose(f);

 

        return true;

}