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- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
- #include "mtypes.h"
- #include "mdriver.h"
- #include "mwav.h"
-
-
- typedef struct WAV{
- char rID[4];
- ULONG rLen;
- char wID[4];
- char fID[4];
- ULONG fLen;
- UWORD wFormatTag;
- UWORD nChannels;
- ULONG nSamplesPerSec;
- ULONG nAvgBytesPerSec;
- UWORD nBlockAlign;
- UWORD nFormatSpecific;
- } WAV;
-
-
-
- SAMPLE *MW_LoadWavFP(FILE *fp)
- {
- SAMPLE *si;
- WAV wh;
- char dID[4];
-
- fread(&wh,sizeof(WAV),1,fp);
-
- if( memcmp(wh.rID,"RIFF",4) ||
- memcmp(wh.wID,"WAVE",4) ||
- memcmp(wh.fID,"fmt ",4) ){
- myerr="Not a WAV file";
- return NULL;
- }
-
- // skip other crap
-
- fseek(fp,wh.fLen-16,SEEK_CUR);
- fread(dID,4,1,fp);
-
- if( memcmp(dID,"data",4) ){
- myerr="Not a WAV file";
- return NULL;
- }
-
- if(wh.nChannels>1){
- myerr="Only mono WAV's are supported";
- return NULL;
- }
-
- // printf("wFormatTag: %x\n",wh.wFormatTag);
- // printf("blockalign: %x\n",wh.nBlockAlign);
- // prinff("nFormatSpc: %x\n",wh.nFormatSpecific);
-
- if((si=calloc(1,sizeof(SAMPLE)))==NULL){
- myerr="Out of memory";
- return NULL;
- };
-
- si->c2spd=8192;
- si->volume=64;
- fread(&si->length,4,1,fp);
-
- if(wh.nBlockAlign==2){
- si->flags=SF_16BITS|SF_SIGNED;
- si->length>>=1;
- }
-
- si->handle=MD_SampleLoad(fp,si->length,0,si->length,si->flags);
-
- if(si->handle<0){
- free(si);
- return NULL;
- }
-
- return si;
- }
-
-
- SAMPLE *MW_LoadWavFN(char *filename)
- {
- FILE *fp;
- SAMPLE *si;
-
- if((fp=fopen(filename,"rb"))==NULL){
- myerr="Couldn't open wav file";
- return NULL;
- }
-
- si=MW_LoadWavFP(fp);
-
- fclose(fp);
- return si;
- }
-
-
- void MW_FreeWav(SAMPLE *si)
- {
- if(si!=NULL){
- MD_SampleUnLoad(si->handle);
- free(si);
- }
- }
-