src/audio/paudio/SDL_paudio.h
author Sam Lantinga <slouken@libsdl.org>
Mon, 08 Dec 2008 00:25:42 +0000
branchSDL-1.2
changeset 4159 a1b03ba2fcd0
parent 1402 d910939febfa
child 6137 4720145f848b
permissions -rw-r--r--
Updated copyright date
     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 */