Mercurial > sdl-ios-xcode
view src/audio/SDL_sysaudio.h @ 4357:a10dac5858fe SDL-1.2
Recommendation from Lennart Poettering:
In ALSA_OpenAudio(): instead of setting period_size+n_periods OR
buffer_size I'd recommend copying the hwparams stuff before you do
this, then first try period_size+n_periods, and then apply it with
snd_pcm_hw_params() and check if that works. If it didn't you should
take the copy of hwparams and try setting buffer_size and apply that
via snd_pcm_hw_params() and check if that worked. And if that failed
too, then take the copy and don't apply neither period nor buffer
settings and see if that works.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 19 Oct 2009 02:23:21 +0000 |
parents | 5007e6a66814 |
children | fe15c4e8efe6 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 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 the SDL audio driver structure */ #define _THIS SDL_AudioDevice *_this #ifndef _STATUS #define _STATUS SDL_status *status #endif struct SDL_AudioDevice { /* * * */ /* The name of this audio driver */ const char *name; /* * * */ /* The description of this audio driver */ const char *desc; /* * * */ /* Public driver functions */ int (*OpenAudio)(_THIS, SDL_AudioSpec *spec); void (*ThreadInit)(_THIS); /* Called by audio thread at start */ void (*WaitAudio)(_THIS); void (*PlayAudio)(_THIS); Uint8 *(*GetAudioBuf)(_THIS); void (*WaitDone)(_THIS); void (*CloseAudio)(_THIS); /* * * */ /* Lock / Unlock functions added for the Mac port */ void (*LockAudio)(_THIS); void (*UnlockAudio)(_THIS); /* * * */ /* 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 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; /* * * */ /* The function used to dispose of this structure */ void (*free)(_THIS); }; #undef _THIS typedef struct AudioBootStrap { const char *name; const char *desc; int (*available)(void); SDL_AudioDevice *(*create)(int devindex); } AudioBootStrap; #if SDL_AUDIO_DRIVER_BSD extern AudioBootStrap BSD_AUDIO_bootstrap; #endif #if SDL_AUDIO_DRIVER_PULSE extern AudioBootStrap PULSE_bootstrap; #endif #if SDL_AUDIO_DRIVER_ALSA extern AudioBootStrap ALSA_bootstrap; #endif #if SDL_AUDIO_DRIVER_OSS extern AudioBootStrap DSP_bootstrap; extern AudioBootStrap DMA_bootstrap; #endif #if SDL_AUDIO_DRIVER_QNXNTO extern AudioBootStrap QNXNTOAUDIO_bootstrap; #endif #if SDL_AUDIO_DRIVER_SUNAUDIO extern AudioBootStrap SUNAUDIO_bootstrap; #endif #if SDL_AUDIO_DRIVER_DMEDIA extern AudioBootStrap DMEDIA_bootstrap; #endif #if SDL_AUDIO_DRIVER_ARTS extern AudioBootStrap ARTS_bootstrap; #endif #if SDL_AUDIO_DRIVER_ESD extern AudioBootStrap ESD_bootstrap; #endif #if SDL_AUDIO_DRIVER_NAS extern AudioBootStrap NAS_bootstrap; #endif #if SDL_AUDIO_DRIVER_DSOUND extern AudioBootStrap DSOUND_bootstrap; #endif #if SDL_AUDIO_DRIVER_WAVEOUT extern AudioBootStrap WAVEOUT_bootstrap; #endif #if SDL_AUDIO_DRIVER_PAUD extern AudioBootStrap Paud_bootstrap; #endif #if SDL_AUDIO_DRIVER_BAUDIO extern AudioBootStrap BAUDIO_bootstrap; #endif #if SDL_AUDIO_DRIVER_COREAUDIO extern AudioBootStrap COREAUDIO_bootstrap; #endif #if SDL_AUDIO_DRIVER_SNDMGR extern AudioBootStrap SNDMGR_bootstrap; #endif #if SDL_AUDIO_DRIVER_MINT extern AudioBootStrap MINTAUDIO_GSXB_bootstrap; extern AudioBootStrap MINTAUDIO_MCSN_bootstrap; extern AudioBootStrap MINTAUDIO_STFA_bootstrap; extern AudioBootStrap MINTAUDIO_XBIOS_bootstrap; extern AudioBootStrap MINTAUDIO_DMA8_bootstrap; #endif #if SDL_AUDIO_DRIVER_DISK extern AudioBootStrap DISKAUD_bootstrap; #endif #if SDL_AUDIO_DRIVER_DUMMY extern AudioBootStrap DUMMYAUD_bootstrap; #endif #if SDL_AUDIO_DRIVER_DC extern AudioBootStrap DCAUD_bootstrap; #endif #if SDL_AUDIO_DRIVER_NDS extern AudioBootStrap NDSAUD_bootstrap; #endif #if SDL_AUDIO_DRIVER_MMEAUDIO extern AudioBootStrap MMEAUDIO_bootstrap; #endif #if SDL_AUDIO_DRIVER_DART extern AudioBootStrap DART_bootstrap; #endif #if SDL_AUDIO_DRIVER_EPOCAUDIO extern AudioBootStrap EPOCAudio_bootstrap; #endif /* This is the current audio device */ extern SDL_AudioDevice *current_audio; #endif /* _SDL_sysaudio_h */