diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/audio/dma/SDL_dmaaudio.h')
| -rw-r--r-- | distrib/sdl-1.2.15/src/audio/dma/SDL_dmaaudio.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/audio/dma/SDL_dmaaudio.h b/distrib/sdl-1.2.15/src/audio/dma/SDL_dmaaudio.h new file mode 100644 index 0000000..9a45f73 --- /dev/null +++ b/distrib/sdl-1.2.15/src/audio/dma/SDL_dmaaudio.h @@ -0,0 +1,59 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 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_dspaudio_h +#define _SDL_dspaudio_h + +#include "../SDL_sysaudio.h" + +/* Hidden "this" pointer for the video functions */ +#define _THIS SDL_AudioDevice *this + +struct SDL_PrivateAudioData { + /* The file descriptor for the audio device */ + int audio_fd; + + /* The parent process id, to detect when application quits */ + pid_t parent; + + /* Raw mixing buffer */ + Uint8 *dma_buf; + int dma_len; + int num_buffers; + + /* Support for audio timing using a timer, in addition to select() */ + float frame_ticks; + float next_frame; +}; +#define FUDGE_TICKS 10 /* The scheduler overhead ticks per frame */ + +/* Old variable names */ +#define audio_fd (this->hidden->audio_fd) +#define parent (this->hidden->parent) +#define dma_buf (this->hidden->dma_buf) +#define dma_len (this->hidden->dma_len) +#define num_buffers (this->hidden->num_buffers) +#define frame_ticks (this->hidden->frame_ticks) +#define next_frame (this->hidden->next_frame) + +#endif /* _SDL_dspaudio_h */ |