src/audio/paudio/SDL_paudio.h
author Sam Lantinga <slouken@libsdl.org>
Fri, 14 Dec 2001 12:38:15 +0000
changeset 252 e8157fcb3114
parent 0 74212992fb08
child 297 f6ffac90895c
permissions -rw-r--r--
Updated the source with the correct e-mail address
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001  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 
    23 #ifdef SAVE_RCSID
    24 static char rcsid =
    25  "@(#) $Id$";
    26 #endif
    27 
    28 #ifndef _SDL_paudaudio_h
    29 #define _SDL_paudaudio_h
    30 
    31 #include "SDL_sysaudio.h"
    32 
    33 /* Hidden "this" pointer for the video functions */
    34 #define _THIS	SDL_AudioDevice *this
    35 
    36 struct SDL_PrivateAudioData {
    37 	/* The file descriptor for the audio device */
    38 	int audio_fd;
    39 
    40 	/* The parent process id, to detect when application quits */
    41 	pid_t parent;
    42 
    43 	/* Raw mixing buffer */
    44 	Uint8 *mixbuf;
    45 	int    mixlen;
    46 
    47 	/* Support for audio timing using a timer, in addition to select() */
    48 	float frame_ticks;
    49 	float next_frame;
    50 };
    51 #define FUDGE_TICKS	10	/* The scheduler overhead ticks per frame */
    52 
    53 /* Old variable names */
    54 #define audio_fd		(this->hidden->audio_fd)
    55 #define parent			(this->hidden->parent)
    56 #define mixbuf			(this->hidden->mixbuf)
    57 #define mixlen			(this->hidden->mixlen)
    58 #define frame_ticks		(this->hidden->frame_ticks)
    59 #define next_frame		(this->hidden->next_frame)
    60 
    61 #endif /* _SDL_paudaudio_h */