From: "Osah" <osah AT geneva-link DOT ch>
Newsgroups: comp.os.msdos.djgpp
Subject: Re:Re: Allegro Program Problem (Pleeasse Hellp me Somebody :-( )
Date: Wed, 26 Jan 2000 20:38:14 +0100
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

I forgot the code, so here it is:

I wrote a program with allegro to get input from the microphone from the
user and output it to the speakers at the same time, but i don't seem to be
getting the desired results from either the microphone or speakers. Below
are the code listings (Sorry if it is too long):

/*
 *    Example program for the Allegro library, by Cable_TXG.
 *
 *    This program shows how to use the audio recording functions.
 */

#include <stdio.h>
#include "allegro.h"


int main(void)
{
   void *rec_buffer;
   int rec_bits=0; // What type of supported Sample from Audio input...
   int rec_stereo=0; // Are we capable to record in stereo mode?
   int rec_rate=0;  // Maximum possible recording frequency.
   int user_rate = 0;
   int rec_parm=0; // Recording Parameter supported by Audio Driver?
   int buffer_size, data_ready=0;

   allegro_init();
   install_keyboard();
   install_timer();

   /* install a digital sound driver */
   if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, NULL) != 0)
   {
      printf("Error initialising sound system\n%s\n", allegro_error);
      return 1;
   }
   /* Initialize the sound recorder module */
   if (install_sound_input(DIGI_AUTODETECT, MIDI_NONE) != 0)
   {
      printf("Error initialising sound recoder module.\n%s\n",
allegro_error);
      return 2;
   }
   if ((rec_bits = get_sound_input_cap_bits()) == 0)
   {
      printf("Audio input not supported.\n");
      return 3;
   }

   rec_stereo = get_sound_input_cap_stereo();
   rec_rate = get_sound_input_cap_rate(rec_bits, rec_stereo);

   printf("Maximum recording frequency: %d\n",rec_rate);
   // printf("Enter your choice: "); // Get recording frequency from user

   user_rate = rec_rate;
   // while(1)
   // {
   //     scanf("%d",&user_rate);
   //     fflush(stdin);
   //     if((user_rate > 0) && (user_rate <= rec_rate))
   //                   break;
   // }

   rec_parm = get_sound_input_cap_parm(user_rate,rec_bits,rec_stereo);
   switch(rec_parm)
   {
      case 0: printf("Impossible to record at this rate.\n");
              return 4;
      case 1: printf("Recording is possible, audio output suspended.\n");
              break;
      case 2: printf("Recording/Playing supported\n");
              break;
      default: printf("Not supported, try rate: %d\n",rec_parm);
               break;
   }

   if (set_sound_input_source(SOUND_INPUT_MIC) == -1)
   {
      printf("Input Select Register not provided by Hardware.\n");
      return 5;
   }

   printf("Press any key to end recording....\n");
   buffer_size = start_sound_input(user_rate, rec_bits, rec_stereo);
   if(buffer_size == 0)
   {
      printf("Error in sound input: %s",allegro_error);
      return 5;
   }
   rec_buffer = (void *)malloc(buffer_size);
   while(!keypressed())
   {
        data_ready = read_sound_input(rec_buffer);
        if(!data_ready)
           printf("No new Data yet...\n");
   }
   stop_sound_input();
   printf("Thanks for using this test program....\n");
   free(rec_buffer);
   allegro_exit();
   return 0;
}

Please send any answers to me as well as this NG.
Thanks.