1/* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2004 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Library General Public 7 License as published by the Free Software Foundation; either 8 version 2 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 Library General Public License for more details. 14 15 You should have received a copy of the GNU Library General Public 16 License along with this library; if not, write to the Free 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 19 Sam Lantinga 20 slouken@libsdl.org 21*/ 22#include "SDL_config.h" 23 24/* Allow access to a raw mixing buffer */ 25 26#ifndef _SDL_lowaudio_h 27#define _SDL_lowaudio_h 28 29#include "../SDL_sysaudio.h" 30 31/* Hidden "this" pointer for the video functions */ 32#define _THIS SDL_AudioDevice *this 33#define NUM_BUFFERS 2 34 35struct SharedMem { 36 HWAVEOUT sound; 37 WAVEHDR wHdr[NUM_BUFFERS]; 38 PCMWAVEFORMAT wFmt; 39}; 40 41struct SDL_PrivateAudioData { 42 Uint8 *mixbuf; /* The raw allocated mixing buffer */ 43 struct SharedMem *shm; 44 int next_buffer; 45}; 46 47#define shm (this->hidden->shm) 48#define mixbuf (this->hidden->mixbuf) 49#define next_buffer (this->hidden->next_buffer) 50/* Old variable names */ 51#endif /* _SDL_lowaudio_h */ 52