diff options
Diffstat (limited to 'media/libstagefright/codecs/amrwbenc/src/log2.c')
| -rw-r--r-- | media/libstagefright/codecs/amrwbenc/src/log2.c | 64 |
1 files changed, 32 insertions, 32 deletions
diff --git a/media/libstagefright/codecs/amrwbenc/src/log2.c b/media/libstagefright/codecs/amrwbenc/src/log2.c index 0f65541..f14058e 100644 --- a/media/libstagefright/codecs/amrwbenc/src/log2.c +++ b/media/libstagefright/codecs/amrwbenc/src/log2.c @@ -54,33 +54,33 @@ *************************************************************************/ void Log2_norm ( - Word32 L_x, /* (i) : input value (normalized) */ - Word16 exp, /* (i) : norm_l (L_x) */ - Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */ - Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1) */ - ) + Word32 L_x, /* (i) : input value (normalized) */ + Word16 exp, /* (i) : norm_l (L_x) */ + Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */ + Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1) */ + ) { - Word16 i, a, tmp; - Word32 L_y; - if (L_x <= (Word32) 0) - { - *exponent = 0; - *fraction = 0; - return; - } - *exponent = (30 - exp); - L_x = (L_x >> 9); - i = extract_h (L_x); /* Extract b25-b31 */ - L_x = (L_x >> 1); - a = (Word16)(L_x); /* Extract b10-b24 of fraction */ - a = (Word16)(a & (Word16)0x7fff); - i -= 32; - L_y = L_deposit_h (table[i]); /* table[i] << 16 */ - tmp = vo_sub(table[i], table[i + 1]); /* table[i] - table[i+1] */ - L_y = vo_L_msu (L_y, tmp, a); /* L_y -= tmp*a*2 */ - *fraction = extract_h (L_y); + Word16 i, a, tmp; + Word32 L_y; + if (L_x <= (Word32) 0) + { + *exponent = 0; + *fraction = 0; + return; + } + *exponent = (30 - exp); + L_x = (L_x >> 9); + i = extract_h (L_x); /* Extract b25-b31 */ + L_x = (L_x >> 1); + a = (Word16)(L_x); /* Extract b10-b24 of fraction */ + a = (Word16)(a & (Word16)0x7fff); + i -= 32; + L_y = L_deposit_h (table[i]); /* table[i] << 16 */ + tmp = vo_sub(table[i], table[i + 1]); /* table[i] - table[i+1] */ + L_y = vo_L_msu (L_y, tmp, a); /* L_y -= tmp*a*2 */ + *fraction = extract_h (L_y); - return; + return; } /************************************************************************* @@ -96,15 +96,15 @@ void Log2_norm ( *************************************************************************/ void Log2 ( - Word32 L_x, /* (i) : input value */ - Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */ - Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1) */ - ) + Word32 L_x, /* (i) : input value */ + Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */ + Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1) */ + ) { - Word16 exp; + Word16 exp; - exp = norm_l(L_x); - Log2_norm ((L_x << exp), exp, exponent, fraction); + exp = norm_l(L_x); + Log2_norm ((L_x << exp), exp, exponent, fraction); } |