Mercurial > sdl-ios-xcode
view src/main/epoc/SDL_main.cpp @ 1982:3b4ce57c6215
First shot at new audio data types (int32 and float32).
Notable changes:
- Converters between types are autogenerated. Instead of making multiple
passes over the data with seperate filters for endianess, size, signedness,
etc, converting between data types is always one specialized filter. This
simplifies SDL_BuildAudioCVT(), which otherwise had a million edge cases
with the new types, and makes the actually conversions more CPU cache
friendly. Left a stub for adding specific optimized versions of these
routines (SSE/MMX/Altivec, assembler, etc)
- Autogenerated converters are built by SDL/src/audio/sdlgenaudiocvt.pl. This
does not need to be run unless tweaking the code, and thus doesn't need
integration into the build system.
- Went through all the drivers and tried to weed out all the "Uint16"
references that are better specified with the new SDL_AudioFormat typedef.
- Cleaned out a bunch of hardcoded bitwise magic numbers and replaced them
with new SDL_AUDIO_* macros.
- Added initial float32 and int32 support code. Theoretically, existing
drivers will push these through converters to get the data they want to
feed to the hardware.
Still TODO:
- Optimize and debug new converters.
- Update the CoreAudio backend to accept float32 data directly.
- Other backends, too?
- SDL_LoadWAV() needs to be updated to support int32 and float32 .wav files
(both of which exist and can be generated by 'sox' for testing purposes).
- Update the mixer to handle new datatypes.
- Optionally update SDL_sound and SDL_mixer, etc.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Thu, 24 Aug 2006 12:10:46 +0000 |
parents | f6ffac90895c |
children |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ /* SDL_main.cpp The Epoc executable startup functions Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi) */ #include <e32std.h> #include <e32def.h> #include <e32svr.h> #include <e32base.h> #include <estlib.h> #include <stdlib.h> #include <stdio.h> #include <w32std.h> #include <apgtask.h> #include "SDL_error.h" #ifndef EXPORT_C # ifdef __VC32__ # define IMPORT_C __declspec(dllexport) # define EXPORT_C __declspec(dllexport) # endif # ifdef __GCC32__ # define IMPORT_C # define EXPORT_C __declspec(dllexport) # endif #endif #if defined(__WINS__) #include <estw32.h> IMPORT_C void RegisterWsExe(const TDesC &aName); #endif /* The prototype for the application's main() function */ #define main SDL_main extern "C" int main (int argc, char *argv[], char *envp[]); extern "C" void exit (int ret); /* Epoc main function */ GLDEF_C TInt E32Main() { /* Get the clean-up stack */ CTrapCleanup* cleanup = CTrapCleanup::New(); #if defined(__WINS__) /* arrange for access to Win32 stdin/stdout/stderr */ RWin32Stream::StartServer(); #endif /* Arrange for multi-threaded operation */ SpawnPosixServerThread(); /* Get args and environment */ int argc=0; char** argv=0; char** envp=0; __crt0(argc,argv,envp); #if defined(__WINS__) /* Cause the graphical Window Server to come into existence */ RSemaphore sem; sem.CreateGlobal(_L("WsExeSem"),0); RegisterWsExe(sem.FullName()); #endif /* Start the application! */ /* Create stdlib */ _REENT; /* Set process and thread priority */ RThread currentThread; currentThread.Rename(_L("SdlProgram")); currentThread.SetProcessPriority(EPriorityLow); currentThread.SetPriority(EPriorityMuchLess); /* Call stdlib main */ int ret = main(argc, argv, envp); /* !! process exits here if there is "exit()" in main! */ /* Call exit */ exit(ret); /* !! process exits here! */ /* Free resources and return */ CloseSTDLIB(); delete cleanup; return(KErrNone); } /* Epoc dll entry point */ #if defined(__WINS__) GLDEF_C TInt E32Dll(TDllReason) { return(KErrNone); } EXPORT_C TInt WinsMain(TAny *) { E32Main(); return KErrNone; } #endif