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[/] [s6soc/] [trunk/] [sw/] [host/] [buildsamples.cpp] - Blame information for rev 38

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1 12 dgisselq
////////////////////////////////////////////////////////////////////////////////
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//
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// Filename:    buildsamples.cpp
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//
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// Project:     CMod S6 System on a Chip, ZipCPU demonstration project
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//
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// Purpose:     This program converts an 8kHz, 16t, mono- sound data file into
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//              samples that can be read and understood by the C compiler and
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//      hence included in a S6SoC project as the ``doorbell'' audio sound.
10 12 dgisselq
//
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//      To use this, first convert your sound file to 8kHz, 16t, raw mono
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//      format.  The sox utility works well for this purpose.
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//
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//      Then, run this program wih the single argument being the name of that
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//      sound file.   The standard output will be the resulting C-code 
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//      representing/recreating that sound file.  Pipe this into a file for
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//      inclusion in your program.  You can then reference both the number of
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//      samples from that file, as well as the number of words those samples
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//      are stored in, as well as what those samples are.
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//
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//      The samples themselves can then be placed in a flash partition, and
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//      read like any memory from within your program.
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//
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// Creator:     Dan Gisselquist, Ph.D.
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//              Gisselquist Technology, LLC
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2015-2016, Gisselquist Technology, LLC
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//
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of  the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program.  (It's in the $(ROOT)/doc directory, run make with no
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// target there if the PDF file isn't present.)  If not, see
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// <http://www.gnu.org/licenses/> for a copy.
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//
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// License:     GPL, v3, as defined and found on www.gnu.org,
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//              http://www.gnu.org/licenses/gpl.html
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define SLEN    512
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#define ILEN    (SLEN/2)
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int     main(int argc, char **argv) {
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        FILE    *fp, *legal;
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        char    cbuf[SLEN];
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        short   sbuf[SLEN];
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        int     nread = 0, nr;
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        if (argc != 1) {
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                fprintf(stderr,
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"Usage:\tbuildsamples samplefile\n"
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"\n"
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"\twhere 'samplefile' is a sound data file consisting of 16-bit samples\n"
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"\tthat have been sampled at 8kHz.  The sample file should have no\n"
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"\theader, and should only reference a mono (not stereo) output.\n"
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"\n"
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"\tThe result is a C program fragment that can be redirected to a file for\n"
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"\tlater inclusion in your project.\n");
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                exit(EXIT_SUCCESS);
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        }
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80 12 dgisselq
        fp = fopen(argv[1], "rb");
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        if (!fp) {
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                fprintf(stderr, "Could not open %s for reading\n", argv[1]);
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                exit(EXIT_FAILURE);
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        }
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        /*
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        legal = fopen("../legal.txt", "r");
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        if (!legal)
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                legal = fopen("../../legal.txt", "r");
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        */
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        legal = NULL;
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        if (legal) {
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                while(fgets(cbuf, SLEN, legal)) {
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                        if (strncmp(cbuf, "// Filename:", 12)==0)
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                                printf("// Filename:\tsamples.c\n");
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                        else    printf("%s", cbuf);
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                } fclose(legal);
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        } else {
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                printf("// This file should be copyrighted but I can't find\n");
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                printf("// the copyright statement.\n//\n");
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        }
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        printf(
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"// This file is computer generated--DO NOT EDIT IT!  The generator file can\n"
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"// be found in trunk/sw/host/%s\n"
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"//\n"
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"//\n"
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"#ifndef\tSOUND_DATA_H\n"
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"#define\tSOUND_DATA_H\n\n"
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"const\tint\tsound_data[] = {\n", __FILE__);
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        while((nr = fread(sbuf, sizeof(short), SLEN, fp))>0) {
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                int     pos = 0;
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                nread += nr;
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                while(pos < nr) {
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                        printf("\t");
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                        for(int i=0; (pos<((nr+1)&-2))&&(i<8); i+=2) {
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                                int iv = (sbuf[pos]<<16)|(sbuf[pos+1] & 0x0ffff);
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                                printf("0x%08x, ", iv);
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                                pos+=2;
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                        } printf("\n");
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                }
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        } printf("\t0\n};\n");
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        printf("\n\n"
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"#define\tNSAMPLES\t%d\n"
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"#define\tNSAMPLE_WORDS\t%d\n"
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"\n\n#endif\n", nread, 1+((nread+1)>>1));
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}
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