src/audio/alsa/SDL_alsa_audio.h
author Sam Lantinga <slouken@libsdl.org>
Mon, 15 Apr 2002 07:38:54 +0000
changeset 354 30935e76acb5
parent 297 f6ffac90895c
child 757 4f46fee887fe
permissions -rw-r--r--
Updated ALSA audio support for ALSA 0.9
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  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 #ifndef _ALSA_PCM_audio_h
    24 #define _ALSA_PCM_audio_h
    25 
    26 #include "SDL_sysaudio.h"
    27 #include <alsa/asoundlib.h>
    28 
    29 /* Hidden "this" pointer for the video functions */
    30 #define _THIS	SDL_AudioDevice *this
    31 
    32 struct SDL_PrivateAudioData {
    33 	/* The audio device handle */
    34 	snd_pcm_t *pcm_handle;
    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 
    44 /* Old variable names */
    45 #define pcm_handle		(this->hidden->pcm_handle)
    46 #define parent			(this->hidden->parent)
    47 #define mixbuf			(this->hidden->mixbuf)
    48 #define mixlen			(this->hidden->mixlen)
    49 
    50 #endif /* _ALSA_PCM_audio_h */