/*************************************************************************** *   Copyright (C) 2004 by Tyler Montbriand                                * *   tsm@accesscomm.ca                                                     * *                                                                         * *   Released under the GNU LGPL                                           * ***************************************************************************/#ifndef __SDL_AUDIOIN_INTERNAL_H__#define __SDL_AUDIOIN_INTERNAL_H__#include <SDL/SDL_audio.h>typedef struct __SDOUND_INPUTFUNCTIONS__{  const char     *name;        /* Short name like "DSP", "WINDIB", etc */  const char     *description; /* Input driver description */  const char     *url;         /* Author email or webpage */    /**   * Attempts to initialize the driver.  Expected to return -1 failure,    * 0 on success.   */  int  (*init)(void);  /* Attempts to de-initialize driver. */  void (*quit)(void);  /**   * Attempts to open audio input device according to specifications.   * If these specifications cannot be met, different ones may be used.   * Returns 0 on success, -1 on error.   */  int (*open)(SDL_AudioSpec *given, SDL_AudioSpec *actual);  /* Attempts to close an opened audio input device. */  void (*close)(void);  /* Attempts to pause or unpause an opened audio input device. */  int (*pause)(int);} Sound_InputFunctions;extern Sound_InputFunctions driver_RAND;typedef union UniPtr{  Uint8       *u8ptr;  Sint8       *s8ptr;  Uint16      *u16ptr;  Sint16      *s16ptr;  Uint32      *u32ptr;  Sint32      *s32ptr;  float       *fptr;  double      *dptr;  long double *ldptr;  void        *vptr;  } UniPtr;/** * Returns 1 if audiospec is valid, 0 if not. * Outputs more verbose errorcodes to SDL_GetError. * ignores samples and silence. */DECLSPEC int  SDLCALL AudioSpecValid(const SDL_AudioSpec *spec);/*! \brief Calculates the byte size of the buffer. */DECLSPEC int SDLCALL AudioSpecSize(const SDL_AudioSpec *spec);/*! \brief Returns the # of milliseconds of sound in one buffer. */DECLSPEC int  SDLCALL AudioSpecTicks(const SDL_AudioSpec *spec);DECLSPEC int SDLCALL null_init(void);DECLSPEC void SDLCALL null_quit(void);extern volatile SDL_audiostatus audioin_status;#endif/*__SDL_AUDIOIN_INTERNAL_H__*/