Mercurial > almixer_isolated
view Isolated/LGPL/SDL_endian_minimal.h @ 62:7a4a8459f0c1
Ogg Vorbis decoder for SoundDecoder directly adapted from SDL_sound's code. Thanks to Johnson Lin for providing this!
Instead of trying to backport my Tremor decoder which originated from the SDL_sound Vorbis decoder, I told Johnson it would be better to just start at the source and avoid all the original gotchas I hit in the subtle differences between Tremor and Vorbis.
Since this derives directly from Ryan Gordon's SDL_sound implementation, I am putting this under the LGPL subdirectory.
Johnson Lin < arch . jslin - at - gmail . com >
| author | Eric Wing <ewing . public |-at-| gmail . com> |
|---|---|
| date | Tue, 19 Jun 2012 00:31:12 -0700 |
| parents | 71b465ff0622 |
| children | 492239f6ffc9 |
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/* 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 */ /* Attention: This is a stripped down file of SDL_endian for our purposes. This code is licensed under the LGPL. This means we must not compile this code into anything that we are not willing to publicly release source code. You should compile this into a separate dynamic library that is isolated from proprietary code. */ #ifndef SDL_endian_minimal_h #define SDL_endian_minimal_h #ifdef ANDROID_NDK #include <endian.h> #define SDL_BYTEORDER _BYTE_ORDER #define SDL_BIG_ENDIAN _BIG_ENDIAN #define SDL_LITTLE_ENDIAN _LITTLE_ENDIAN #endif #include <stdint.h> #if defined(__GNUC__) && defined(__i386__) && \ !(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */) static __inline__ uint32_t SDL_Swap32(uint32_t x) { __asm__("bswap %0" : "=r" (x) : "0" (x)); return x; } #elif defined(__GNUC__) && defined(__x86_64__) static __inline__ uint32_t SDL_Swap32(uint32_t x) { __asm__("bswapl %0" : "=r" (x) : "0" (x)); return x; } #elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__)) static __inline__ uint32_t SDL_Swap32(uint32_t x) { uint32_t result; __asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (x>>24), "r" (x)); __asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (x)); __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (x)); return result; } #elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) static __inline__ uint32_t SDL_Swap32(uint32_t x) { __asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0" : "=d" (x) : "0" (x) : "cc"); return x; } #else static __inline__ uint32_t SDL_Swap32(uint32_t x) { return((x<<24)|((x<<8)&0x00FF0000)|((x>>8)&0x0000FF00)|(x>>24)); } #endif #if SDL_BYTEORDER == SDL_BIG_ENDIAN #define SDL_SwapLE16(X) SDL_Swap16(X) #define SDL_SwapLE32(X) SDL_Swap32(X) #define SDL_SwapLE64(X) SDL_Swap64(X) #define SDL_SwapBE16(X) (X) #define SDL_SwapBE32(X) (X) #define SDL_SwapBE64(X) (X) #else #define SDL_SwapLE16(X) (X) #define SDL_SwapLE32(X) (X) #define SDL_SwapLE64(X) (X) #define SDL_SwapBE16(X) SDL_Swap16(X) #define SDL_SwapBE32(X) SDL_Swap32(X) #define SDL_SwapBE64(X) SDL_Swap64(X) #endif #endif // SDL_endian_minimal_h