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-rw-r--r--media/libstagefright/codecs/amrwbenc/src/oper_32b.c223
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diff --git a/media/libstagefright/codecs/amrwbenc/src/oper_32b.c b/media/libstagefright/codecs/amrwbenc/src/oper_32b.c
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index 27cad76..0000000
--- a/media/libstagefright/codecs/amrwbenc/src/oper_32b.c
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@@ -1,223 +0,0 @@
-/*
- ** Copyright 2003-2010, VisualOn, Inc.
- **
- ** Licensed under the Apache License, Version 2.0 (the "License");
- ** you may not use this file except in compliance with the License.
- ** You may obtain a copy of the License at
- **
- ** http://www.apache.org/licenses/LICENSE-2.0
- **
- ** Unless required by applicable law or agreed to in writing, software
- ** distributed under the License is distributed on an "AS IS" BASIS,
- ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- ** See the License for the specific language governing permissions and
- ** limitations under the License.
- */
-
-/*****************************************************************************
- * This file contains operations in double precision. *
- * These operations are not standard double precision operations. *
- * They are used where single precision is not enough but the full 32 bits *
- * precision is not necessary. For example, the function Div_32() has a *
- * 24 bits precision which is enough for our purposes. *
- * *
- * The double precision numbers use a special representation: *
- * *
- * L_32 = hi<<16 + lo<<1 *
- * *
- * L_32 is a 32 bit integer. *
- * hi and lo are 16 bit signed integers. *
- * As the low part also contains the sign, this allows fast multiplication. *
- * *
- * 0x8000 0000 <= L_32 <= 0x7fff fffe. *
- * *
- * We will use DPF (Double Precision Format )in this file to specify *
- * this special format. *
- *****************************************************************************
-*/
-#include "typedef.h"
-#include "basic_op.h"
-#include "oper_32b.h"
-
-/*****************************************************************************
- * *
- * Function L_Extract() *
- * *
- * Extract from a 32 bit integer two 16 bit DPF. *
- * *
- * Arguments: *
- * *
- * L_32 : 32 bit integer. *
- * 0x8000 0000 <= L_32 <= 0x7fff ffff. *
- * hi : b16 to b31 of L_32 *
- * lo : (L_32 - hi<<16)>>1 *
- *****************************************************************************
-*/
-
-__inline void VO_L_Extract (Word32 L_32, Word16 *hi, Word16 *lo)
-{
- *hi = (Word16)(L_32 >> 16);
- *lo = (Word16)((L_32 & 0xffff) >> 1);
- return;
-}
-
-/*****************************************************************************
- * *
- * Function L_Comp() *
- * *
- * Compose from two 16 bit DPF a 32 bit integer. *
- * *
- * L_32 = hi<<16 + lo<<1 *
- * *
- * Arguments: *
- * *
- * hi msb *
- * lo lsf (with sign) *
- * *
- * Return Value : *
- * *
- * 32 bit long signed integer (Word32) whose value falls in the *
- * range : 0x8000 0000 <= L_32 <= 0x7fff fff0. *
- * *
- *****************************************************************************
-*/
-
-Word32 L_Comp (Word16 hi, Word16 lo)
-{
- Word32 L_32;
-
- L_32 = L_deposit_h (hi);
-
- return (L_mac (L_32, lo, 1)); /* = hi<<16 + lo<<1 */
-}
-
-/*****************************************************************************
- * Function Mpy_32() *
- * *
- * Multiply two 32 bit integers (DPF). The result is divided by 2**31 *
- * *
- * L_32 = (hi1*hi2)<<1 + ( (hi1*lo2)>>15 + (lo1*hi2)>>15 )<<1 *
- * *
- * This operation can also be viewed as the multiplication of two Q31 *
- * number and the result is also in Q31. *
- * *
- * Arguments: *
- * *
- * hi1 hi part of first number *
- * lo1 lo part of first number *
- * hi2 hi part of second number *
- * lo2 lo part of second number *
- * *
- *****************************************************************************
-*/
-
-__inline Word32 Mpy_32 (Word16 hi1, Word16 lo1, Word16 hi2, Word16 lo2)
-{
- Word32 L_32;
- L_32 = (hi1 * hi2);
- L_32 += (hi1 * lo2) >> 15;
- L_32 += (lo1 * hi2) >> 15;
- L_32 <<= 1;
-
- return (L_32);
-}
-
-/*****************************************************************************
- * Function Mpy_32_16() *
- * *
- * Multiply a 16 bit integer by a 32 bit (DPF). The result is divided *
- * by 2**15 *
- * *
- * *
- * L_32 = (hi1*lo2)<<1 + ((lo1*lo2)>>15)<<1 *
- * *
- * Arguments: *
- * *
- * hi hi part of 32 bit number. *
- * lo lo part of 32 bit number. *
- * n 16 bit number. *
- * *
- *****************************************************************************
-*/
-
-__inline Word32 Mpy_32_16 (Word16 hi, Word16 lo, Word16 n)
-{
- Word32 L_32;
-
- L_32 = (hi * n)<<1;
- L_32 += (((lo * n)>>15)<<1);
-
- return (L_32);
-}
-
-/*****************************************************************************
- * *
- * Function Name : Div_32 *
- * *
- * Purpose : *
- * Fractional integer division of two 32 bit numbers. *
- * L_num / L_denom. *
- * L_num and L_denom must be positive and L_num < L_denom. *
- * L_denom = denom_hi<<16 + denom_lo<<1 *
- * denom_hi is a normalize number. *
- * *
- * Inputs : *
- * *
- * L_num *
- * 32 bit long signed integer (Word32) whose value falls in the *
- * range : 0x0000 0000 < L_num < L_denom *
- * *
- * L_denom = denom_hi<<16 + denom_lo<<1 (DPF) *
- * *
- * denom_hi *
- * 16 bit positive normalized integer whose value falls in the *
- * range : 0x4000 < hi < 0x7fff *
- * denom_lo *
- * 16 bit positive integer whose value falls in the *
- * range : 0 < lo < 0x7fff *
- * *
- * Return Value : *
- * *
- * L_div *
- * 32 bit long signed integer (Word32) whose value falls in the *
- * range : 0x0000 0000 <= L_div <= 0x7fff ffff. *
- * *
- * Algorithm: *
- * *
- * - find = 1/L_denom. *
- * First approximation: approx = 1 / denom_hi *
- * 1/L_denom = approx * (2.0 - L_denom * approx ) *
- * *
- * - result = L_num * (1/L_denom) *
- *****************************************************************************
-*/
-
-Word32 Div_32 (Word32 L_num, Word16 denom_hi, Word16 denom_lo)
-{
- Word16 approx, hi, lo, n_hi, n_lo;
- Word32 L_32;
-
- /* First approximation: 1 / L_denom = 1/denom_hi */
-
- approx = div_s ((Word16) 0x3fff, denom_hi);
-
- /* 1/L_denom = approx * (2.0 - L_denom * approx) */
-
- L_32 = Mpy_32_16 (denom_hi, denom_lo, approx);
-
- L_32 = L_sub ((Word32) 0x7fffffffL, L_32);
- hi = L_32 >> 16;
- lo = (L_32 & 0xffff) >> 1;
-
- L_32 = Mpy_32_16 (hi, lo, approx);
-
- /* L_num * (1/L_denom) */
- hi = L_32 >> 16;
- lo = (L_32 & 0xffff) >> 1;
- VO_L_Extract (L_num, &n_hi, &n_lo);
- L_32 = Mpy_32 (n_hi, n_lo, hi, lo);
- L_32 = L_shl2(L_32, 2);
-
- return (L_32);
-}
-
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