diff options
Diffstat (limited to 'apps/codecs/lib/codeclib.h')
| -rw-r--r-- | apps/codecs/lib/codeclib.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/apps/codecs/lib/codeclib.h b/apps/codecs/lib/codeclib.h index e7f45d3..bf7b417 100644 --- a/apps/codecs/lib/codeclib.h +++ b/apps/codecs/lib/codeclib.h @@ -19,6 +19,9 @@ * ****************************************************************************/ +#ifndef __CODECLIB_H__ +#define __CODECLIB_H__ + #include "config.h" #include "codecs.h" #include <sys/types.h> @@ -71,6 +74,37 @@ unsigned udiv32_arm(unsigned a, unsigned b); #define UDIV32(a, b) (a / b) #endif +/* TODO figure out if we really need to care about calculating + av_log2(0) */ +#if (defined(CPU_ARM) && (ARM_ARCH > 4)) +static inline unsigned int av_log2(uint32_t v) +{ + unsigned int lz = __builtin_clz(v); + return 31 - lz + (lz >> 5); /* make sure av_log2(0) returns 0 */ +} +#else +/* From libavutil/common.h */ +extern const uint8_t ff_log2_tab[256] ICONST_ATTR; + +static inline unsigned int av_log2(unsigned int v) +{ + int n; + + n = 0; + if (v & 0xffff0000) { + v >>= 16; + n += 16; + } + if (v & 0xff00) { + v >>= 8; + n += 8; + } + n += ff_log2_tab[v]; + + return n; +} +#endif + /* Various codec helper functions */ int codec_init(void); @@ -82,3 +116,5 @@ void __cyg_profile_func_enter(void *this_fn, void *call_site) void __cyg_profile_func_exit(void *this_fn, void *call_site) NO_PROF_ATTR ICODE_ATTR; #endif + +#endif /* __CODECLIB_H__ */ |