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duke3d: rewrite sound mixing to use fixed-point

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Gives significant performance improvement on ipod6g.

Change-Id: I1e8462bec197acb10e770c796240b5001df52440
This commit is contained in:
Franklin Wei 2017-12-25 14:53:11 -05:00
parent 78db1d9502
commit 9f6ce046cb
10 changed files with 476 additions and 449 deletions
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13
apps/plugins/sdl/include/SDL_config_rockbox.h
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@ -195,4 +195,17 @@ void fatal(char *fmt, ...);
void rb_exit(int rc);
void rbsdl_atexit(void (*)(void));
/* speed */
static inline uint16_t readLE16(void *addr)
{
uint8_t *ptr = addr;
return (*(ptr+1) << 8) | *ptr;
}
static inline uint32_t readLE32(void *addr)
{
uint8_t *ptr = addr;
return (*(ptr+3) << 24) |(*(ptr+2) << 16) | (*(ptr+1) << 8) | *ptr;
}
#endif /* _SDL_config_rockbox_h */