view src/audio/mint/SDL_mintaudio_stfa.h @ 2659:8da698bc1205 gsoc2008_audio_resampling

Fixed lots of bugs in FIR filtering. Fixed point code is closer to working, but there seems to be overflow in the FIR filter resulting in distortion.
author Aaron Wishnick <schnarf@gmail.com>
date Sun, 22 Jun 2008 00:36:35 +0000
parents c121d94672cb
children 99210400e8b9
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 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"

/*
	STFA control structure

	Patrice Mandin
*/

#ifndef _SDL_mintaudio_stfa_h
#define _SDL_mintaudio_stfa_h

/*--- Defines ---*/

#define C_STFA	0x53544641L     /* Sound treiber für atari (seb/The removers) */

#define STFA_PLAY_ENABLE	(1<<0)
#define STFA_PLAY_DISABLE	(0<<0)
#define STFA_PLAY_REPEAT	(1<<1)
#define STFA_PLAY_SINGLE	(0<<1)

#define STFA_FORMAT_SIGNED		(1<<15)
#define STFA_FORMAT_UNSIGNED	(0<<15)
#define STFA_FORMAT_STEREO		(1<<14)
#define STFA_FORMAT_MONO		(0<<14)
#define STFA_FORMAT_16BIT		(1<<13)
#define STFA_FORMAT_8BIT		(0<<13)
#define STFA_FORMAT_LITENDIAN	(1<<9)
#define STFA_FORMAT_BIGENDIAN	(0<<9)
#define STFA_FORMAT_FREQ_MASK	0x0f
enum
{
    STFA_FORMAT_F4995 = 0,
    STFA_FORMAT_F6269,
    STFA_FORMAT_F7493,
    STFA_FORMAT_F8192,

    STFA_FORMAT_F9830,
    STFA_FORMAT_F10971,
    STFA_FORMAT_F12538,
    STFA_FORMAT_F14985,

    STFA_FORMAT_F16384,
    STFA_FORMAT_F19819,
    STFA_FORMAT_F21943,
    STFA_FORMAT_F24576,

    STFA_FORMAT_F30720,
    STFA_FORMAT_F32336,
    STFA_FORMAT_F43885,
    STFA_FORMAT_F49152
};

/*--- Types ---*/

typedef struct
{
    unsigned short sound_enable;
    unsigned short sound_control;
    unsigned short sound_output;
    unsigned long sound_start;
    unsigned long sound_current;
    unsigned long sound_end;
    unsigned short version;
    void *old_vbl;
    void *old_timera;
    unsigned long old_mfp_status;
    void *new_vbl;
    void *drivers_list;
    void *play_stop;
    unsigned short frequency;
    void *set_frequency;

    unsigned short frequency_threshold;
    unsigned short *custom_freq_table;
    unsigned short stfa_on_off;
    void *new_drivers_list;
    unsigned long old_bit_2_of_cookie_snd;
    void (*stfa_it) (void);
} cookie_stfa_t __attribute__ ((packed));

#endif /* _SDL_mintaudio_stfa_h */
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