src/audio/paudio/SDL_paudio.h
author Sam Lantinga <slouken@libsdl.org>
Thu, 16 Feb 2006 10:11:48 +0000
changeset 1361 19418e4422cb
parent 1312 c9b51268668f
child 1402 d910939febfa
permissions -rw-r--r--
New configure-based build system. Still work in progress, but much improved
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 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 
    23 #ifndef _SDL_paudaudio_h
    24 #define _SDL_paudaudio_h
    25 
    26 #include "../SDL_sysaudio.h"
    27 
    28 /* Hidden "this" pointer for the video functions */
    29 #define _THIS	SDL_AudioDevice *this
    30 
    31 struct SDL_PrivateAudioData {
    32 	/* The file descriptor for the audio device */
    33 	int audio_fd;
    34 
    35 	/* The parent process id, to detect when application quits */
    36 	pid_t parent;
    37 
    38 	/* Raw mixing buffer */
    39 	Uint8 *mixbuf;
    40 	int    mixlen;
    41 
    42 	/* Support for audio timing using a timer, in addition to select() */
    43 	float frame_ticks;
    44 	float next_frame;
    45 };
    46 #define FUDGE_TICKS	10	/* The scheduler overhead ticks per frame */
    47 
    48 /* Old variable names */
    49 #define audio_fd		(this->hidden->audio_fd)
    50 #define parent			(this->hidden->parent)
    51 #define mixbuf			(this->hidden->mixbuf)
    52 #define mixlen			(this->hidden->mixlen)
    53 #define frame_ticks		(this->hidden->frame_ticks)
    54 #define next_frame		(this->hidden->next_frame)
    55 
    56 #endif /* _SDL_paudaudio_h */