view src/audio/sun/SDL_sunaudio.h @ 3496:78fc8ea578b2

Joe 2009-11-23 21:31:10 PST If type is ::SDL_HAPTIC_CARTESIAN, direction is encoded by three positions 367 * (X axis, Y axis and Z axis (with 3 axes)). ::SDL_HAPTIC_CARTESIAN uses 368 * the first three \c dir parameters. The cardinal directions would be: 369 * - North: 0,-1, 0 370 * - East: -1, 0, 0 371 * - South: 0, 1, 0 372 * - West: 1, 0, 0 typedef struct SDL_HapticDirection { Uint8 type; /**< The type of encoding. */ Uint16 dir[3]; /**< The encoded direction. */ } SDL_HapticDirection; An unsigned int can't store negative values and I don't see an alternate way to encode them in the docs or source. The best I have been able to come up with is using a negative magnitude for the effect but this will only get me 2 of the 4 quadrants in the plane for 2d effects. I looked at the win32 and linux implementations and I believe is is safe to use signed ints in the direction struct. I am unfamiliar with the darwin haptics API so I don't know if it is safe.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 27 Nov 2009 19:29:27 +0000
parents 99210400e8b9
children f7b03b6838cb
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifndef _SDL_sunaudio_h
#define _SDL_sunaudio_h

#include "../SDL_sysaudio.h"

/* Hidden "this" pointer for the audio functions */
#define _THIS	SDL_AudioDevice *this

struct SDL_PrivateAudioData
{
    /* The file descriptor for the audio device */
    int audio_fd;

    SDL_AudioFormat audio_fmt;  /* The app audio format */
    Uint8 *mixbuf;              /* The app mixing buffer */
    int ulaw_only;              /* Flag -- does hardware only output U-law? */
    Uint8 *ulaw_buf;            /* The U-law mixing buffer */
    Sint32 written;             /* The number of samples written */
    int fragsize;               /* The audio fragment size in samples */
    int frequency;              /* The audio frequency in KHz */
};

/* Old variable names */
#define audio_fd		(this->hidden->audio_fd)
#define audio_fmt		(this->hidden->audio_fmt)
#define mixbuf			(this->hidden->mixbuf)
#define ulaw_only		(this->hidden->ulaw_only)
#define ulaw_buf		(this->hidden->ulaw_buf)
#define written			(this->hidden->written)
#define fragsize		(this->hidden->fragsize)
#define frequency		(this->hidden->frequency)

#endif /* _SDL_sunaudio_h */

/* vi: set ts=4 sw=4 expandtab: */