1 /*

     2     SDL - Simple DirectMedia Layer

     3     Copyright (C) 1997-2004 Sam Lantinga

     4 

     5     This library is free software; you can redistribute it and/or

     6     modify it under the terms of the GNU Library General Public

     7     License as published by the Free Software Foundation; either

     8     version 2 of the License, or (at your option) any later version.

     9 

    10     This library is distributed in the hope that it will be useful,

    11     but WITHOUT ANY WARRANTY; without even the implied warranty of

    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13     Library General Public License for more details.

    14 

    15     You should have received a copy of the GNU Library General Public

    16     License along with this library; if not, write to the Free

    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    18 

    19     Sam Lantinga

    20     slouken@libsdl.org

    21 */

    22 #include "SDL_config.h"

    23 

    24 /* Allow access to a raw mixing buffer */

    25 

    26 #ifndef _SDL_lowaudio_h

    27 #define _SDL_lowaudio_h

    28 

    29 #include "../SDL_sysaudio.h"

    30 

    31 /* Hidden "this" pointer for the video functions */

    32 #define _THIS	SDL_AudioDevice *this

    33 #define NUM_BUFFERS 2

    34 

    35 struct SharedMem {

    36     HWAVEOUT sound;

    37     WAVEHDR wHdr[NUM_BUFFERS];

    38     PCMWAVEFORMAT wFmt;

    39 };

    40 

    41 struct SDL_PrivateAudioData {

    42     Uint8 *mixbuf;          /* The raw allocated mixing buffer */

    43     struct SharedMem *shm;

    44     int next_buffer;

    45 };

    46 

    47 #define shm			(this->hidden->shm)

    48 #define mixbuf			(this->hidden->mixbuf)

    49 #define next_buffer		(this->hidden->next_buffer)

    50 /* Old variable names */

    51 #endif /* _SDL_lowaudio_h */