1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 #include "SDL_config.h" 23 24 #ifndef _SDL_lowaudio_h 25 #define _SDL_lowaudio_h 26 27 #include "../SDL_sysaudio.h" 28 29 /* Hidden "this" pointer for the video functions */ 30 #define _THIS SDL_AudioDevice *this 31 32 struct SDL_PrivateAudioData { 33 /* The file descriptor for the audio device */ 34 int audio_fd; 35 36 Uint16 audio_fmt; /* The app audio format */ 37 Uint8 *mixbuf; /* The app mixing buffer */ 38 int ulaw_only; /* Flag -- does hardware only output U-law? */ 39 Uint8 *ulaw_buf; /* The U-law mixing buffer */ 40 Sint32 written; /* The number of samples written */ 41 int fragsize; /* The audio fragment size in samples */ 42 int frequency; /* The audio frequency in KHz */ 43 }; 44 45 /* Old variable names */ 46 #define audio_fd (this->hidden->audio_fd) 47 #define audio_fmt (this->hidden->audio_fmt) 48 #define mixbuf (this->hidden->mixbuf) 49 #define ulaw_only (this->hidden->ulaw_only) 50 #define ulaw_buf (this->hidden->ulaw_buf) 51 #define written (this->hidden->written) 52 #define fragsize (this->hidden->fragsize) 53 #define frequency (this->hidden->frequency) 54 55 #endif /* _SDL_lowaudio_h */ 56
