| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 Sam Lantinga |
| |
| This library is SDL_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_sysaudio_h |
| #define _SDL_sysaudio_h |
| |
| #include "SDL_mutex.h" |
| #include "SDL_thread.h" |
| |
| /* The SDL audio driver */ |
| typedef struct SDL_AudioDevice SDL_AudioDevice; |
| #define _THIS SDL_AudioDevice *_this |
| |
| typedef struct SDL_AudioDriverImpl |
| { |
| int (*DetectDevices)(int iscapture); |
| const char *(*GetDeviceName)(int index, int iscapture); |
| int (*OpenDevice) (_THIS, const char *devname, int iscapture); |
| void (*ThreadInit) (_THIS); /* Called by audio thread at start */ |
| void (*WaitDevice) (_THIS); |
| void (*PlayDevice) (_THIS); |
| Uint8 *(*GetDeviceBuf) (_THIS); |
| void (*WaitDone) (_THIS); |
| void (*CloseDevice) (_THIS); |
| void (*LockDevice) (_THIS); |
| void (*UnlockDevice) (_THIS); |
| void (*Deinitialize) (void); |
| |
| /* Some flags to push duplicate code into the core and reduce #ifdefs. */ |
| int ProvidesOwnCallbackThread:1; |
| int SkipMixerLock:1; |
| int HasCaptureSupport:1; |
| int OnlyHasDefaultOutputDevice:1; |
| int OnlyHasDefaultInputDevice:1; |
| } SDL_AudioDriverImpl; |
| |
| |
| typedef struct SDL_AudioDriver |
| { |
| /* * * */ |
| /* The name of this audio driver */ |
| const char *name; |
| |
| /* * * */ |
| /* The description of this audio driver */ |
| const char *desc; |
| |
| SDL_AudioDriverImpl impl; |
| } SDL_AudioDriver; |
| |
| |
| /* Define the SDL audio driver structure */ |
| struct SDL_AudioDevice |
| { |
| /* * * */ |
| /* Data common to all devices */ |
| |
| /* The current audio specification (shared with audio thread) */ |
| SDL_AudioSpec spec; |
| |
| /* An audio conversion block for audio format emulation */ |
| SDL_AudioCVT convert; |
| |
| /* Current state flags */ |
| int iscapture; |
| int enabled; |
| int paused; |
| int opened; |
| |
| /* Fake audio buffer for when the audio hardware is busy */ |
| Uint8 *fake_stream; |
| |
| /* A semaphore for locking the mixing buffers */ |
| SDL_mutex *mixer_lock; |
| |
| /* A thread to feed the audio device */ |
| SDL_Thread *thread; |
| Uint32 threadid; |
| |
| /* * * */ |
| /* Data private to this driver */ |
| struct SDL_PrivateAudioData *hidden; |
| }; |
| #undef _THIS |
| |
| typedef struct AudioBootStrap |
| { |
| const char *name; |
| const char *desc; |
| int (*init) (SDL_AudioDriverImpl *impl); |
| int demand_only:1; /* 1==request explicitly, or it won't be available. */ |
| } AudioBootStrap; |
| |
| #endif /* _SDL_sysaudio_h */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |