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Add wavsmpl.

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This commit is contained in:
Marisa the Magician 2021-02-26 16:04:09 +01:00
commit 7008244a2d
3 changed files with 133 additions and 63 deletions
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89
wavsmpl.c Normal file
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@ -0,0 +1,89 @@
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
typedef struct
{
char magic[4];
uint32_t size;
char type[4];
} riff_t;
typedef struct
{
char id[4];
uint32_t size;
} chunk_t;
typedef struct
{
uint32_t mf, prod, sp, mnote, mpitch, sfmt, sofs, nloops, sdata;
} smpl_t;
typedef struct
{
uint32_t id, type, start, end, fraction, count;
} sloop_t;
int main( int argc, char **argv )
{
if ( argc < 2 ) return 1;
FILE *fin;
for ( int i=1; i<argc; i++ )
{
if ( !(fin = fopen(argv[i],"rb")) )
{
fprintf(stderr,"couldn't open %s: %s\n",argv[i],strerror(errno));
continue;
}
riff_t head;
if ( fread(&head,1,sizeof(riff_t),fin) != sizeof(riff_t) )
{
fprintf(stderr,"%s: premature end of file reached reading file header\n",argv[i]);
goto skipme;
}
if ( strncmp(head.magic,"RIFF",4) )
{
fprintf(stderr,"%s: invalid RIFF header\n",argv[i]);
goto skipme;
}
while ( !feof(fin) )
{
chunk_t chk;
if ( fread(&chk,1,sizeof(chunk_t),fin) != sizeof(chunk_t) )
{
fprintf(stderr,"%s: premature end of file reached reading chunk header\n",argv[i]);
goto skipme;
}
if ( strncmp(chk.id,"smpl",4) )
{
printf("Skipping over %.4s chunk (%u bytes)\n",chk.id,chk.size);
fseek(fin,chk.size,SEEK_CUR);
continue;
}
printf("smpl chunk found\n");
smpl_t smpl;
if ( fread(&smpl,1,sizeof(smpl_t),fin) != sizeof(smpl_t) )
{
fprintf(stderr,"%s: premature end of file reached reading smpl data\n",argv[i]);
goto skipme;
}
printf("%u loops contained\n",smpl.nloops);
for ( uint32_t j=0; j<smpl.nloops; j++ )
{
sloop_t loop;
if ( fread(&loop,1,sizeof(sloop_t),fin) != sizeof(sloop_t) )
{
fprintf(stderr,"%s: premature end of file reached reading smpl loop\n",argv[i]);
goto skipme;
}
printf("ID: %u\n type: %u\n start: %u\n end: %u\n fraction: %u\n count: %u\n",
loop.id,loop.type,loop.start,loop.end,loop.fraction,loop.count);
}
}
skipme:
fclose(fin);
}
return 0;
}