src/audio/alsa/SDL_alsa_audio.h
changeset 0 74212992fb08
child 252 e8157fcb3114
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/audio/alsa/SDL_alsa_audio.h	Thu Apr 26 16:45:43 2001 +0000
     1.3 @@ -0,0 +1,61 @@
     1.4 +/*
     1.5 +    SDL - Simple DirectMedia Layer
     1.6 +    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
     1.7 +
     1.8 +    This library is free software; you can redistribute it and/or
     1.9 +    modify it under the terms of the GNU Library General Public
    1.10 +    License as published by the Free Software Foundation; either
    1.11 +    version 2 of the License, or (at your option) any later version.
    1.12 +
    1.13 +    This library is distributed in the hope that it will be useful,
    1.14 +    but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 +    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    1.16 +    Library General Public License for more details.
    1.17 +
    1.18 +    You should have received a copy of the GNU Library General Public
    1.19 +    License along with this library; if not, write to the Free
    1.20 +    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    1.21 +
    1.22 +    Sam Lantinga
    1.23 +    slouken@devolution.com
    1.24 +*/
    1.25 +
    1.26 +#ifndef _ALSA_PCM_audio_h
    1.27 +#define _ALSA_PCM_audio_h
    1.28 +
    1.29 +#include "SDL_sysaudio.h"
    1.30 +#include <sys/asoundlib.h>
    1.31 +
    1.32 +/* Hidden "this" pointer for the video functions */
    1.33 +#define _THIS	SDL_AudioDevice *this
    1.34 +
    1.35 +struct SDL_PrivateAudioData {
    1.36 +	/* The audio device handle */
    1.37 +	 snd_pcm_t *audio_handle;
    1.38 +
    1.39 +	/* The audio file descriptor */
    1.40 +	int audio_fd;
    1.41 +
    1.42 +	/* The parent process id, to detect when application quits */
    1.43 +	pid_t parent;
    1.44 +
    1.45 +	/* Raw mixing buffer */
    1.46 +	Uint8 *pcm_buf;
    1.47 +	int    pcm_len;
    1.48 +
    1.49 +	/* Support for audio timing using a timer, in addition to select() */
    1.50 +	float frame_ticks;
    1.51 +	float next_frame;
    1.52 +};
    1.53 +#define FUDGE_TICKS	10	/* The scheduler overhead ticks per frame */
    1.54 +
    1.55 +/* Old variable names */
    1.56 +#define audio_handle	(this->hidden->audio_handle)
    1.57 +#define audio_fd		(this->hidden->audio_fd)
    1.58 +#define parent			(this->hidden->parent)
    1.59 +#define pcm_buf			(this->hidden->pcm_buf)
    1.60 +#define pcm_len			(this->hidden->pcm_len)
    1.61 +#define frame_ticks		(this->hidden->frame_ticks)
    1.62 +#define next_frame		(this->hidden->next_frame)
    1.63 +
    1.64 +#endif /* _ALSA_PCM_audio_h */