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 (at) 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 35 struct SharedMem { 36 HWAVEOUT sound; 37 WAVEHDR wHdr[NUM_BUFFERS]; 38 PCMWAVEFORMAT wFmt; 39 }; 40 41 struct 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
