view src/audio/mint/SDL_mintaudio_dma8.h @ 2866:e532417a6977

Fixed SDL 1.2 compatibility problem. The API specifies that SDL_OpenAudio() will fill out the 'desired' audio spec with the correct samples and size set by the driver. This value is important since it may be used by applications that size audio buffers, etc. However, we want to allow advanced applications to call SDL_OpenAudioDevice() which gets passed a const 'desired' parameter, and have the correct data filled into the 'obtained' parameter, possibly allowing or not allowing format changes. So... 'obtained' becomes the audio format the user callback is expected to use, and we add flags to allow the application to specify which format changes are allowed. Note: We really need to add a way to query the 'obtained' audio spec.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 13 Dec 2008 06:36:47 +0000
parents 99210400e8b9
children
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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 Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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

/*
	DMA 8bits and Falcon Codec audio definitions

	Patrice Mandin, Didier Méquignon
*/

#ifndef _SDL_mintaudio_dma8_h
#define _SDL_mintaudio_dma8_h

#define DMAAUDIO_IO_BASE (0xffff8900)
struct DMAAUDIO_IO_S
{
    unsigned char int_ctrl;
    unsigned char control;

    unsigned char dummy1;
    unsigned char start_high;
    unsigned char dummy2;
    unsigned char start_mid;
    unsigned char dummy3;
    unsigned char start_low;

    unsigned char dummy4;
    unsigned char cur_high;
    unsigned char dummy5;
    unsigned char cur_mid;
    unsigned char dummy6;
    unsigned char cur_low;

    unsigned char dummy7;
    unsigned char end_high;
    unsigned char dummy8;
    unsigned char end_mid;
    unsigned char dummy9;
    unsigned char end_low;

    unsigned char dummy10[12];

    unsigned char track_ctrl;   /* CODEC only */
    unsigned char sound_ctrl;
    unsigned short sound_data;
    unsigned short sound_mask;

    unsigned char dummy11[10];

    unsigned short dev_ctrl;
    unsigned short dest_ctrl;
    unsigned short sync_div;
    unsigned char track_rec;
    unsigned char adderin_input;
    unsigned char channel_input;
    unsigned char channel_amplification;
    unsigned char channel_reduction;

    unsigned char dummy12[6];

    unsigned char data_direction;
    unsigned char dummy13;
    unsigned char dev_data;
};
#define DMAAUDIO_IO ((*(volatile struct DMAAUDIO_IO_S *)DMAAUDIO_IO_BASE))

#endif /* _SDL_mintaudio_dma8_h */
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