[sdl_omap.git] / src / audio / dma / SDL_dmaaudio.h

/*
    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_dspaudio_h
#define _SDL_dspaudio_h

#include "../SDL_sysaudio.h"

/* Hidden "this" pointer for the video 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 */
#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_dspaudio_h */
Commit	Line	Data
e14743d1	1	/*
	2	SDL - Simple DirectMedia Layer
	3	Copyright (C) 1997-2009 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_dspaudio_h
	25	#define _SDL_dspaudio_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	/* The parent process id, to detect when application quits */
	37	pid_t parent;
	38
	39	/* Raw mixing buffer */
	40	Uint8 *dma_buf;
	41	int dma_len;
	42	int num_buffers;
	43
	44	/* Support for audio timing using a timer, in addition to select() */
	45	float frame_ticks;
	46	float next_frame;
	47	};
	48	#define FUDGE_TICKS 10 /* The scheduler overhead ticks per frame */
	49
	50	/* Old variable names */
	51	#define audio_fd (this->hidden->audio_fd)
	52	#define parent (this->hidden->parent)
	53	#define dma_buf (this->hidden->dma_buf)
	54	#define dma_len (this->hidden->dma_len)
	55	#define num_buffers (this->hidden->num_buffers)
	56	#define frame_ticks (this->hidden->frame_ticks)
	57	#define next_frame (this->hidden->next_frame)
	58
	59	#endif /* _SDL_dspaudio_h */