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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 Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 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 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
18 | |
19 | Sam Lantinga |
20 | slouken@libsdl.org |
21 | */ |
22 | #include "SDL_config.h" |
23 | |
24 | #ifndef _SDL_paudaudio_h |
25 | #define _SDL_paudaudio_h |
26 | |
27 | #include "../SDL_sysaudio.h" |
28 | |
29 | /* Hidden "this" pointer for the video functions */ |
30 | #define _THIS SDL_AudioDevice *this |
31 | |
32 | struct SDL_PrivateAudioData { |
33 | /* The file descriptor for the audio device */ |
34 | int audio_fd; |
35 | |
36 | /* The parent process id, to detect when application quits */ |
37 | pid_t parent; |
38 | |
39 | /* Raw mixing buffer */ |
40 | Uint8 *mixbuf; |
41 | int mixlen; |
42 | |
43 | /* Support for audio timing using a timer, in addition to select() */ |
44 | float frame_ticks; |
45 | float next_frame; |
46 | }; |
47 | #define FUDGE_TICKS 10 /* The scheduler overhead ticks per frame */ |
48 | |
49 | /* Old variable names */ |
50 | #define audio_fd (this->hidden->audio_fd) |
51 | #define parent (this->hidden->parent) |
52 | #define mixbuf (this->hidden->mixbuf) |
53 | #define mixlen (this->hidden->mixlen) |
54 | #define frame_ticks (this->hidden->frame_ticks) |
55 | #define next_frame (this->hidden->next_frame) |
56 | |
57 | #endif /* _SDL_paudaudio_h */ |