serum2pro3.c

/* Serum-Format WAV to Pro 3 Sysex
 *
 * Usage:
 * 
 * ./serum2pro3 wavetable-number name serum.wav > sysex-file.syx
 * 
 * wavetable-number is a number between 33 and 64
 * if wavetable-number is 0, serum2pro3 outputs raw PCM instead of sysex
 * name is a string of up to eight characters
 * 
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <errno.h>
#include "sequential_lib/pro3_wavetable.h"
#define WAV_MAX 1050000
 
int main(int argc, char *argv[]) 
{
    /* The wavetable number is expected as a command-line argument */
    if (argc < 5) {
        fprintf(stderr, "\nusage: %s name wavetable-number frame-size serum-wav-path > serum.syx\n\n", argv[0]);
        return -1;
    }

    int wavetable_number = atoi(argv[2]);
    if (wavetable_number && (wavetable_number > 64 || wavetable_number < 33)) {
        fprintf(stderr, "\nwavetable number out of range (33-64)\n\n");
        return -1;
    }
    wavetable_number--; /* Because wavetable numbers are zero-indexed to the Pro3 */

    int frame_size = atoi(argv[3]);
    if (frame_size < 128) {
        fprintf(stderr, "\nframe size out of range (>= 128)\n\n");
        return -1;
    }

    FILE *fp;
    int byte;
    int argnum;

    Wavetable table = new_Wavetable();
    int ref_num = 0;
    if ((fp = fopen(argv[4], "r")) == NULL) {
        fprintf(stderr, "\nwav file not found\n\n");
        return -1;
    } else {
        unsigned long int size = 0;
        int* wav = (int*)malloc(WAV_MAX * sizeof(int));
        while ((byte = getc(fp)) != EOF)
        {
            wav[size++] = byte;
            if (size == WAV_MAX) {
                fprintf(stderr, "wav too big\n\n");
                return -1;
            }
        }
        fclose(fp);
        WAVMeta meta = get_wav_meta(size, wav);
        
        int orig_size = meta.samples / frame_size;

        float ref_dist = (float) PRO3_WAVES / (float) orig_size;
        float ref_num = 0;
        PCMData ref;
        int wave_num;
        for (wave_num = 0; wave_num < orig_size; wave_num++)
        {
            ref = wav_extract(meta, wav, wave_num * frame_size, frame_size);
            pcm_change_size(&ref, PRO3_SAMPLE_SIZE);
            if (!(wave_num > 0 && (int) ref_num == 0)) { /* Protect the first waveform */
                set_reference(&table, &ref, (int) ref_num);
                /* fprintf(stderr, "Wave: %i  Ref: %i\n", wave_num, (int) ref_num); */
            }
            ref_num += ref_dist;
        }
        if ((int) (ref_num - ref_dist) < 15) {
            /* The library fills the first reference into the last, so this is here
             * to override that behavior */
            set_reference(&table, &ref, 15);
        }
        free(wav);
    }

    wavetable_fill(&table);

    /* Output sysex if a wavetable number is specified. Otherwise output raw PCM */
    /* (16-bit big endian) */
    if (wavetable_number) {
        wavetable_sysex_dump(&table, wavetable_number, argv[1]);
    } else {
        wavetable_pcm_dump(&table);
    }

    return 0;
}

/*
 * Copyright (c) 2020 The Beige Maze Project
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */