1 /*
2   Simple DirectMedia Layer
3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4 
5   This software is provided 'as-is', without any express or implied
6   warranty.  In no event will the authors be held liable for any damages
7   arising from the use of this software.
8 
9   Permission is granted to anyone to use this software for any purpose,
10   including commercial applications, and to alter it and redistribute it
11   freely, subject to the following restrictions:
12 
13   1. The origin of this software must not be misrepresented; you must not
14      claim that you wrote the original software. If you use this software
15      in a product, an acknowledgment in the product documentation would be
16      appreciated but is not required.
17   2. Altered source versions must be plainly marked as such, and must not be
18      misrepresented as being the original software.
19   3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22 
23 #ifndef SDL_esdaudio_h_
24 #define SDL_esdaudio_h_
25 
26 #include "../SDL_sysaudio.h"
27 
28 /* Hidden "this" pointer for the audio functions */
29 #define _THIS   SDL_AudioDevice *this
30 
31 struct SDL_PrivateAudioData
32 {
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 */
44     float frame_ticks;
45     float next_frame;
46 };
47 #define FUDGE_TICKS 10      /* The scheduler overhead ticks per frame */
48 
49 #endif /* SDL_esdaudio_h_ */
50 
51 /* vi: set ts=4 sw=4 expandtab: */
52