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Help writing a wav file into memory stick

 
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PeterLeRoi



Joined: 16 May 2007
Posts: 31
PostPosted: Sat Jun 30, 2007 10:07 pm    Post subject: Help writing a wav file into memory stick Reply with quote
I need to write the header first, and second the data. The program I´m using:
Code:

void GrabaWAV(char *name,int size){
   
   int tamanno = size;
   int tamannoHeader = size + 36;
   
   int sstg = sceIoOpen(name, PSP_O_WRONLY | PSP_O_CREAT , 0777);
   printf("\nDescriptor abierto. Size = %d\n", size);
   
        sceIoWrite(sstg, "RIFF",4*sizeof(char));
        sceIoWrite(sstg, &tamannoHeader,sizeof(int));
    sceIoWrite(sstg, "WAVE",4*sizeof(char));
   printf("RIFF chunk descriptor escrito\n");
   
   
   sceIoWrite(sstg, "fmt ",4*sizeof(char));
   sceIoWrite(sstg, "16",sizeof(int));
   sceIoWrite(sstg, "1",sizeof(short));
   sceIoWrite(sstg, "1",sizeof(short));
   sceIoWrite(sstg, "44100",sizeof(int));
   sceIoWrite(sstg, "88200",sizeof(int));
   sceIoWrite(sstg, "2",sizeof(short));
   sceIoWrite(sstg, "16",sizeof(short));
   printf("fmt sub-chunk descriptor escrito\n");
   
   
   sceIoWrite(sstg, "data",4*sizeof(char));
   sceIoWrite(sstg, &tamanno,sizeof(int));
   printf("data sub-chunk descriptor escrito\n");
   
    
        sceIoWrite(sstg, bigbuffer, &tamanno);
        printf("Datos escritos\n");
        sceIoClose(sstg);
 }//GrabaWAV


But it creates a wav file with 0kB, and can´t be opened. I think header is right, can´t find the problem...

Edit: Sorry, the program is correct. It was a problem with the memory stick
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J.F.



Joined: 22 Feb 2004
Posts: 2906
PostPosted: Sun Jul 01, 2007 4:28 am    Post subject: Reply with quote
Wow, your output code is really messed up. For example,

Code:
   sceIoWrite(sstg, "1",sizeof(short));
   sceIoWrite(sstg, "44100",sizeof(int));


"1" is a string, not a short, and "44100" is a string, not an int. If you want to output shorts and ints, point to a short or an int, not a string.
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PeterLeRoi



Joined: 16 May 2007
Posts: 31
PostPosted: Sun Jul 01, 2007 12:16 pm    Post subject: Reply with quote
Yep, you´re right. But, for the wav header, need the "1" to have 2bytes (one short) and "44100" to have 4bytes (one int).

Anyway, thanks ;)
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J.F.



Joined: 22 Feb 2004
Posts: 2906
PostPosted: Sun Jul 01, 2007 3:02 pm    Post subject: Reply with quote
PeterLeRoi wrote:
Yep, you´re right. But, for the wav header, need the "1" to have 2bytes (one short) and "44100" to have 4bytes (one int).

Anyway, thanks ;)


Right, so what you wanted was something like this:

Code:
   short h1 = 1;
   int h2 = 44100;
   sceIoWrite(sstg, &h1,sizeof(short));
   sceIoWrite(sstg, &h2,sizeof(int));


What you REALLY need to do is define the header as a struct, fill in all the fields, then use one write command to write the struct to the file.
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