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view src/audio/dma/SDL_dmaaudio.h @ 2992:dbff5769d742

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The core pointer is comprised of merging the inputs of all mice. If there are other mice, they should show up in the device list, and we want to report events from those devices instead of the core events. However, if XInput isn't supported or we can't find other mice in the device list, we'll add the core pointer and interpret normal mouse events.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Jan 2009 18:29:20 +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_dmaaudio_h
#define _SDL_dmaaudio_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;

    /* The parent process id, to detect when application quits */
    pid_t parent;

    /* Raw mixing buffer */
    Uint8 *dma_buf;
    int dma_len;
    int num_buffers;

    /* Support for audio timing using a timer, in addition to select() */
    float frame_ticks;
    float next_frame;
};
#define FUDGE_TICKS	10      /* The scheduler overhead ticks per frame */

/* Old variable names */
/* !!! FIXME: remove these. */
#define audio_fd		(this->hidden->audio_fd)
#define parent			(this->hidden->parent)
#define dma_buf			(this->hidden->dma_buf)
#define dma_len			(this->hidden->dma_len)
#define num_buffers		(this->hidden->num_buffers)
#define frame_ticks		(this->hidden->frame_ticks)
#define next_frame		(this->hidden->next_frame)

#endif /* _SDL_dmaaudio_h */

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