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1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 */ |