1/*
2    SDL - Simple DirectMedia Layer
3    Copyright (C) 1997-2012 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
35struct SharedMem {
36    HWAVEOUT sound;
37    WAVEHDR wHdr[NUM_BUFFERS];
38    PCMWAVEFORMAT wFmt;
39};
40
41struct 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 */
52