view src/audio/dart/SDL_dart.h @ 2661:d38309be5178 gsoc2008_audio_resampling

The windowed sinc filter generation code seems to be working fine. The FIR filtering code is also now working reasonably well. Occasionally the FIR filter will pop, but setting the normalization factor lower seems to help this. I suspect the problem is in the fixed point multiply/add. I also have a hunch the zero stuffing/sample discarding code is not correct, and I'll look at that soon to get it sorted out.
author Aaron Wishnick <schnarf@gmail.com>
date Wed, 02 Jul 2008 08:04:50 +0000
parents 5f6550e5184f
children 99210400e8b9
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 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_dart_h
#define _SDL_dart_h

#define INCL_TYPES
#define INCL_DOSSEMAPHORES
#define INCL_DOSRESOURCES
#define INCL_DOSMISC
#define INCL_DOSERRORS
#define INCL_DOSPROCESS

#define INCL_OS2MM
#define INCL_MMIOOS2
#define INCL_MCIOS2
#include <os2.h>
#include <os2me.h>              // DART stuff and MMIO stuff

#include "../SDL_sysaudio.h"

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

/* The DirectSound objects */
struct SDL_PrivateAudioData
{
    int iCurrDeviceOrd;
    int iCurrFreq;
    int iCurrBits;
    int iCurrChannels;
    int iCurrNumBufs;
    int iCurrBufSize;

    int iLastPlayedBuf;
    int iNextFreeBuffer;

    MCI_BUFFER_PARMS BufferParms;       // Sound buffer parameters
    MCI_MIX_BUFFER *pMixBuffers;        // Sound buffers
    MCI_MIXSETUP_PARMS MixSetupParms;   // Mixer setup parameters
    HEV hevAudioBufferPlayed;   // Event semaphore to indicate that an audio buffer has been played by DART
};

#endif /* _SDL_dart_h */

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