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 #include "SDL_config.h"

    23 

    24 #ifndef _SDL_lowaudio_h

    25 #define _SDL_lowaudio_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 	Uint16 audio_fmt;        /* The app audio format */

    37 	Uint8 *mixbuf;           /* The app mixing buffer */

    38 	int ulaw_only;           /* Flag -- does hardware only output U-law? */

    39 	Uint8 *ulaw_buf;         /* The U-law mixing buffer */

    40 	Sint32 written;          /* The number of samples written */

    41 	int fragsize;            /* The audio fragment size in samples */

    42 	int frequency;           /* The audio frequency in KHz */

    43 };

    44 

    45 /* Old variable names */

    46 #define audio_fd		(this->hidden->audio_fd)

    47 #define audio_fmt		(this->hidden->audio_fmt)

    48 #define mixbuf			(this->hidden->mixbuf)

    49 #define ulaw_only		(this->hidden->ulaw_only)

    50 #define ulaw_buf		(this->hidden->ulaw_buf)

    51 #define written			(this->hidden->written)

    52 #define fragsize		(this->hidden->fragsize)

    53 #define frequency		(this->hidden->frequency)

    54 

    55 #endif /* _SDL_lowaudio_h */