/*************************************************************************** *   Copyright (C) 2004 by Tyler Montbriand                                * *   tsm@accesscomm.ca                                                     * *                                                                         * *   This program is free software; you can redistribute it and/or modify  * *   it under the terms of the GNU General Public License as published by  * *   the Free Software Foundation; either version 2 of the License, or     * *   (at your option) any later version.                                   * *                                                                         * *   This program is distributed in the hope that it will be useful,       * *   but WITHOUT ANY WARRANTY; without even the implied warranty of        * *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         * *   GNU General Public License for more details.                          * *                                                                         * *   You should have received a copy of the GNU General Public License     * *   along with this program; if not, write to the                         * *   Free Software Foundation, Inc.,                                       * *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             * ***************************************************************************/#include <stdio.h>#include "SDL_audioin.h"#include "SDL_audioin_internal.h"#include "audio_detect.h"/* Used privately;  index of initialized driver, or -1. */static int      audioin_init=-1;/* Used by other drivers - status of audio input */volatile SDL_audiostatus audioin_status=SDL_AUDIO_STOPPED;/* Array of input drivers */extern const Sound_InputFunctions *drivers[];int SDL_InitAudioIn(){  int n;//fprintf(stderr,"INIT_AUDIO \n");  if(audioin_init>=0)  {    SDL_SetError("Audio Input already initialized!\n");    return(-1);  }  for(n=0; drivers[n]!=NULL; n++)    if(drivers[n]->init()>=0)    {      audioin_init=n;      fprintf(stderr,"INIT_AUDIO %d\n",n);      return(0);    }  SDL_SetError("No usable input drivers\n");  return(-1);}int SDL_OpenAudioIn(SDL_AudioSpec *desired, SDL_AudioSpec *result){//fprintf(stderr,"OPEN_AUDIO \n");SDL_Delay(1);  if(audioin_init<0)  {//  fprintf(stderr,"Not initialized, call SDL_InitAudioIn()\n");    SDL_SetError("Not initialized, call SDL_InitAudioIn() first\n");    return(-1);  }  else if(!AudioSpecValid(desired))    return(-1);  return(drivers[audioin_init]->open(desired,result));}int SDL_PauseAudioIn(int pause_on){  if(audioin_init<0)  {    SDL_SetError("Not initialized, call SDL_InitAudioIn() first\n");    return(-1);  }  else if(audioin_status==SDL_AUDIO_STOPPED)  {    SDL_SetError("Audio not open, call SDL_OpenAudioIn() first\n");    return(-1);  }  else    return(drivers[audioin_init]->pause(pause_on));}void SDL_CloseAudioIn(void){//fprintf(stderr,"CLOSE_AUDIO \n");  if(audioin_init>=0)  {    if(audioin_status!=SDL_AUDIO_STOPPED)      drivers[audioin_init]->close();  }  return;}void SDL_QuitAudioIn(void){//fprintf(stderr,"QUIT_AUDIO \n");  if(audioin_init>=0)  {    SDL_CloseAudioIn();    drivers[audioin_init]->quit();    audioin_init=-1;  }  return;}SDL_audiostatus SDL_GetAudioInStatus(void){  return(audioin_status);}const Sound_InputFunctions *drivers[]={#ifdef AUDIOIN_DEVDSP  &driver_DEVDSP,#endif/*AUDIOIN_DEVDSP*/#ifdef AUDIOIN_RAND  &driver_RAND,#endif/*AUDIOIN_RAND*/#ifdef AUDIOIN_WINDIB  &driver_WINDIB,#endif/*AUDIOIN_WINDIB*/NULL};int null_init(void){  return(0);}void null_quit(void){  SDL_CloseAudioIn();  return;}int AudioSpecSize(const SDL_AudioSpec *spec){  if(spec==NULL)    return(0);  switch(spec->format)  {  case AUDIO_U8:  case AUDIO_S8:    return(spec->channels*spec->samples);    break;  case AUDIO_S16LSB:  case AUDIO_S16MSB:  case AUDIO_U16LSB:  case AUDIO_U16MSB:    return(spec->channels*spec->samples*2);    break;  default:    return(0);  }}int AudioSpecTicks(const SDL_AudioSpec *spec){  if(spec==NULL)    return(0);  return((spec->samples*1000)/spec->freq);}int AudioSpecValid(const SDL_AudioSpec *spec){  int n;  static const int validfreqs[]={      6000, 8000, 11025, 22050, 32000,     44100, 48000,64000, 88200, 96000,    192000,-1};    if(spec==NULL)    return(0);  n=0;  while(validfreqs[n]!=spec->freq)  {    if(validfreqs[n]==-1)    {      SDL_SetError("Invalid frequency: %d\n",spec->freq);      return(0);    }    n++;  }  if((spec->channels<1)||(spec->channels>2))  {    SDL_SetError("Invalid # of channels: %d\n",spec->channels);    return(0);  }  switch(spec->format)  {  case AUDIO_U8:  case AUDIO_S8:  case AUDIO_U16LSB:  case AUDIO_U16MSB:  case AUDIO_S16LSB:  case AUDIO_S16MSB:    break;  default:    SDL_SetError("Unknown audio format 0x%08x\n",spec->format);    return(0);  }  if(spec->samples<=0)  {    SDL_SetError("Invalid # of samples: %d\n",spec->samples);    return(0);  }  }