sdl_audioin_internal.h

spec5xx for xp in terminal 在xp下编译过的摄像头驱动源码

/***************************************************************************
 *   Copyright (C) 2004 by Tyler Montbriand                                *
 *   [e-mail]                                                     *
 *                                                                         *
 *   Released under the GNU LGPL                                           *
 ***************************************************************************/

#ifndef __SDL_AUDIOIN_INTERNAL_H__
#define __SDL_AUDIOIN_INTERNAL_H__

#include <SDL_audio.h>




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__*/