Mercurial > sdl-ios-xcode
view src/audio/SDL_sysaudio.h @ 4954:144d9df7e611
Added the step to edit local properties
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 04 Jan 2011 12:39:10 -0800 |
parents | f7b03b6838cb |
children | b530ef003506 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2010 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; /* Streamer */ typedef struct { Uint8 *buffer; int max_len; /* the maximum length in bytes */ int read_pos, write_pos; /* the position of the write and read heads in bytes */ } SDL_AudioStreamer; /* 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; /* The streamer, if sample rate conversion necessitates it */ int use_streamer; SDL_AudioStreamer streamer; /* 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; SDL_threadID 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: */