Mercurial > sdl-ios-xcode
view src/audio/SDL_audio_c.h @ 2866:e532417a6977
Fixed SDL 1.2 compatibility problem.
The API specifies that SDL_OpenAudio() will fill out the 'desired' audio spec
with the correct samples and size set by the driver. This value is important
since it may be used by applications that size audio buffers, etc.
However, we want to allow advanced applications to call SDL_OpenAudioDevice()
which gets passed a const 'desired' parameter, and have the correct data filled
into the 'obtained' parameter, possibly allowing or not allowing format changes.
So... 'obtained' becomes the audio format the user callback is expected to use,
and we add flags to allow the application to specify which format changes are
allowed.
Note: We really need to add a way to query the 'obtained' audio spec.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sat, 13 Dec 2008 06:36:47 +0000 |
parents | 99210400e8b9 |
children | f3dcf04412cf |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 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" /* Functions and variables exported from SDL_audio.c for SDL_sysaudio.c */ /* Functions to get a list of "close" audio formats */ extern SDL_AudioFormat SDL_FirstAudioFormat(SDL_AudioFormat format); extern SDL_AudioFormat SDL_NextAudioFormat(void); /* Function to calculate the size and silence for a SDL_AudioSpec */ extern void SDL_CalculateAudioSpec(SDL_AudioSpec * spec); /* The actual mixing thread function */ extern int SDLCALL SDL_RunAudio(void *audiop); /* this is used internally to access some autogenerated code. */ typedef struct { SDL_AudioFormat src_fmt; SDL_AudioFormat dst_fmt; SDL_AudioFilter filter; } SDL_AudioTypeFilters; extern const SDL_AudioTypeFilters sdl_audio_type_filters[]; /* vi: set ts=4 sw=4 expandtab: */