Tue, 16 Aug 2005

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URL: Microsoft SQL Server Express 2005

posted at: 00:38 | path: /windows

Sat, 13 Aug 2005

Audio Player DLL

Well this project involves a lot of things that definitely are entertaining. It started as a Audio Playing DLL. Vague? You bet. Anyway, this DLL is nothing more than an MP3 player or was. I started writing and got more excited everytime and eventually I decided to make it compatible with XPCOM, and use it to play audio through mozilla. I actually wrote that piece of code and its stashed somewhere!

Anyway, it was becoming more like a kludge than a library. So I decided to rewrite it entirely. I separated the code a lot in order for it to become sort of modular. Now you can actually play OGG's aswell. Can add any other type of sound aslong as you rewrite the 5 routines required.
Here is how it currently works:

#include "AudioDecoderEngine.h"
#include "MP3Library.h"
#include <windows.h>
#include <stdio.h>
#include <time.h>
/* This callback only works on MP3s */

void callback(void * data, status ourStatus, void * user_data) {

    pfData ourData = (pfData)data;
    pmp3data innerData = (pmp3data)ourData->extraFileData;

    static int calls = 0;

    if (calls++ < 1 && ourStatus != STATUS_CLOSING)

           fprintf(stdout, "Layer[%s] Mode[%s] Emphasis[%s]\n\r",
             MP3Layer[innerData->layer],
             MP3Mode[innerData->mode],
             MP3Emphasis[innerData->emphasis]);


    switch(ourStatus)
     {        case STATUS_CLOSING:
         break;

       case STATUS_OPENING:
         break;
       case STATUS_PLAYING:
         fprintf(stdout,"%d%%\r",
            (ourData->currentFrame*100) / ourData->totalFrames );

         break;
       case STATUS_DONE:
         fprintf(stdout, "done playing\n\r");

         calls = 0;
         break;
     }
}

int main(int argc, char **argv)
{

     PAudioLib audio =
     AUDIO_INIT("D:\\Dream Theater - Another Day.mp3", NULL, callback)

     int i;
     AUDIO_LOAD(audio)
     AUDIO_PLAY(audio, 0)

     while(audio->playing)
     {
       Sleep(2000);

     }

     AUDIO_STOP(audio)
     AUDIO_CLOSE(audio)
     return 0;

}

I am still working on it. I assume its thread safe but I really haven't checked that thoroughly. Feel free to download and try it out.

IUnknown

posted at: 03:17 | path: /windows