summaryrefslogtreecommitdiffstats
path: root/media/libstagefright/codecs/amrwbenc/inc/basic_op.h
diff options
context:
space:
mode:
Diffstat (limited to 'media/libstagefright/codecs/amrwbenc/inc/basic_op.h')
-rw-r--r--media/libstagefright/codecs/amrwbenc/inc/basic_op.h2188
1 files changed, 1094 insertions, 1094 deletions
diff --git a/media/libstagefright/codecs/amrwbenc/inc/basic_op.h b/media/libstagefright/codecs/amrwbenc/inc/basic_op.h
index 6a2f860..7734913 100644
--- a/media/libstagefright/codecs/amrwbenc/inc/basic_op.h
+++ b/media/libstagefright/codecs/amrwbenc/inc/basic_op.h
@@ -1,1094 +1,1094 @@
-/*
- ** 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.
- */
-
-
-#ifndef __BASIC_OP_H__
-#define __BASIC_OP_H__
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "typedef.h"
-
-#define MAX_32 (Word32)0x7fffffffL
-#define MIN_32 (Word32)0x80000000L
-
-#define MAX_16 (Word16)+32767 /* 0x7fff */
-#define MIN_16 (Word16)-32768 /* 0x8000 */
-
-
-#ifdef LINUX
-#define static_vo static __inline__
-#else
-#define static_vo static __inline
-#endif
-
-#define saturate(L_var1) (((L_var1) > 0X00007fffL) ? (MAX_16): (((L_var1) < (Word32) 0xffff8000L) ? (MIN_16): ((L_var1) & 0xffff)))
-
-#define abs_s(x) ((Word16)(((x) != MIN_16) ? (((x) >= 0) ? (x) : (-(x))) : MAX_16)) /* Short abs, 1 */
-#define L_deposit_h(x) (((Word32)(x)) << 16) /* 16 bit var1 -> MSB, 2 */
-#define L_deposit_l(x) ((Word32)(x)) /* 16 bit var1 -> LSB, 2 */
-#define L_abs(x) (((x) != MIN_32) ? (((x) >= 0) ? (x) : (-(x))) : MAX_32) /* Long abs, 3*/
-#define negate(var1) ((Word16)(((var1) == MIN_16) ? MAX_16 : (-(var1)))) /* Short negate, 1*/
-#define L_negate(L_var1) (((L_var1) == (MIN_32)) ? (MAX_32) : (-(L_var1))) /* Long negate, 2*/
-
-
-#define extract_h(a) ((Word16)(a >> 16))
-#define extract_l(x) (Word16)((x))
-#define add1(a,b) (a + b)
-#define vo_L_msu(a,b,c) ( a - (( b * c ) << 1) )
-#define vo_mult32(a, b) ((a) * (b))
-#define vo_mult(a,b) (( a * b ) >> 15 )
-#define vo_L_mult(a,b) (((a) * (b)) << 1)
-#define vo_shr_r(var1, var2) ((var1+((Word16)(1L<<(var2-1))))>>var2)
-#define vo_sub(a,b) (a - b)
-#define vo_L_deposit_h(a) ((Word32)((a) << 16))
-#define vo_round(a) ((a + 0x00008000) >> 16)
-#define vo_extract_l(a) ((Word16)(a))
-#define vo_L_add(a,b) (a + b)
-#define vo_L_sub(a,b) (a - b)
-#define vo_mult_r(a,b) ((( a * b ) + 0x4000 ) >> 15 )
-#define vo_negate(a) (-a)
-#define vo_L_shr_r(L_var1, var2) ((L_var1+((Word32)(1L<<(var2-1))))>>var2)
-
-
-/*___________________________________________________________________________
-| |
-| Prototypes for basic arithmetic operators |
-|___________________________________________________________________________|
-*/
-static_vo Word16 add (Word16 var1, Word16 var2); /* Short add,1 */
-static_vo Word16 sub (Word16 var1, Word16 var2); /* Short sub,1 */
-static_vo Word16 shl (Word16 var1, Word16 var2); /* Short shift left, 1 */
-static_vo Word16 shr (Word16 var1, Word16 var2); /* Short shift right, 1 */
-static_vo Word16 mult (Word16 var1, Word16 var2); /* Short mult, 1 */
-static_vo Word32 L_mult (Word16 var1, Word16 var2); /* Long mult, 1 */
-static_vo Word16 voround (Word32 L_var1); /* Round, 1 */
-static_vo Word32 L_mac (Word32 L_var3, Word16 var1, Word16 var2); /* Mac, 1 */
-static_vo Word32 L_msu (Word32 L_var3, Word16 var1, Word16 var2); /* Msu, 1 */
-static_vo Word32 L_add (Word32 L_var1, Word32 L_var2); /* Long add, 2 */
-static_vo Word32 L_sub (Word32 L_var1, Word32 L_var2); /* Long sub, 2 */
-static_vo Word16 mult_r (Word16 var1, Word16 var2); /* Mult with round, 2 */
-static_vo Word32 L_shl2(Word32 L_var1, Word16 var2); /* var2 > 0*/
-static_vo Word32 L_shl (Word32 L_var1, Word16 var2); /* Long shift left, 2 */
-static_vo Word32 L_shr (Word32 L_var1, Word16 var2); /* Long shift right, 2*/
-static_vo Word32 L_shr_r (Word32 L_var1, Word16 var2); /* Long shift right with round, 3 */
-static_vo Word16 norm_s (Word16 var1); /* Short norm, 15 */
-static_vo Word16 div_s (Word16 var1, Word16 var2); /* Short division, 18 */
-static_vo Word16 norm_l (Word32 L_var1); /* Long norm, 30 */
-
-/*___________________________________________________________________________
-| |
-| Functions |
-|___________________________________________________________________________|
-*/
-/*___________________________________________________________________________
-| |
-| Function Name : add |
-| |
-| Purpose : |
-| |
-| Performs the addition (var1+var2) with overflow control and saturation;|
-| the 16 bit result is set at +32767 when overflow occurs or at -32768 |
-| when underflow occurs. |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
-|___________________________________________________________________________|
-*/
-static_vo Word16 add (Word16 var1, Word16 var2)
-{
- Word16 var_out;
- Word32 L_sum;
- L_sum = (Word32) var1 + var2;
- var_out = saturate (L_sum);
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : sub |
-| |
-| Purpose : |
-| |
-| Performs the subtraction (var1+var2) with overflow control and satu- |
-| ration; the 16 bit result is set at +32767 when overflow occurs or at |
-| -32768 when underflow occurs. |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 sub (Word16 var1, Word16 var2)
-{
- Word16 var_out;
- Word32 L_diff;
- L_diff = (Word32) var1 - var2;
- var_out = saturate (L_diff);
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : shl |
-| |
-| Purpose : |
-| |
-| Arithmetically shift the 16 bit input var1 left var2 positions.Zero fill|
-| the var2 LSB of the result. If var2 is negative, arithmetically shift |
-| var1 right by -var2 with sign extension. Saturate the result in case of |
-| underflows or overflows. |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 shl (Word16 var1, Word16 var2)
-{
- Word16 var_out;
- Word32 result;
- if (var2 < 0)
- {
- if (var2 < -16)
- var2 = -16;
- var_out = var1 >> ((Word16)-var2);
- }
- else
- {
- result = (Word32) var1 *((Word32) 1 << var2);
- if ((var2 > 15 && var1 != 0) || (result != (Word32) ((Word16) result)))
- {
- var_out = (Word16)((var1 > 0) ? MAX_16 : MIN_16);
- }
- else
- {
- var_out = extract_l (result);
- }
- }
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : shr |
-| |
-| Purpose : |
-| |
-| Arithmetically shift the 16 bit input var1 right var2 positions with |
-| sign extension. If var2 is negative, arithmetically shift var1 left by |
-| -var2 with sign extension. Saturate the result in case of underflows or |
-| overflows. |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 shr (Word16 var1, Word16 var2)
-{
- Word16 var_out;
- if (var2 < 0)
- {
- if (var2 < -16)
- var2 = -16;
- var_out = shl(var1, (Word16)-var2);
- }
- else
- {
- if (var2 >= 15)
- {
- var_out = (Word16)((var1 < 0) ? -1 : 0);
- }
- else
- {
- if (var1 < 0)
- {
- var_out = (Word16)(~((~var1) >> var2));
- }
- else
- {
- var_out = (Word16)(var1 >> var2);
- }
- }
- }
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : mult |
-| |
-| Purpose : |
-| |
-| Performs the multiplication of var1 by var2 and gives a 16 bit result |
-| which is scaled i.e.: |
-| mult(var1,var2) = extract_l(L_shr((var1 times var2),15)) and |
-| mult(-32768,-32768) = 32767. |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 mult (Word16 var1, Word16 var2)
-{
- Word16 var_out;
- Word32 L_product;
- L_product = (Word32) var1 *(Word32) var2;
- L_product = (L_product & (Word32) 0xffff8000L) >> 15;
- if (L_product & (Word32) 0x00010000L)
- L_product = L_product | (Word32) 0xffff0000L;
- var_out = saturate (L_product);
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_mult |
-| |
-| Purpose : |
-| |
-| L_mult is the 32 bit result of the multiplication of var1 times var2 |
-| with one shift left i.e.: |
-| L_mult(var1,var2) = L_shl((var1 times var2),1) and |
-| L_mult(-32768,-32768) = 2147483647. |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_mult (Word16 var1, Word16 var2)
-{
- Word32 L_var_out;
- L_var_out = (Word32) var1 *(Word32) var2;
- if (L_var_out != (Word32) 0x40000000L)
- {
- L_var_out *= 2;
- }
- else
- {
- L_var_out = MAX_32;
- }
- return (L_var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : round |
-| |
-| Purpose : |
-| |
-| Round the lower 16 bits of the 32 bit input number into the MS 16 bits |
-| with saturation. Shift the resulting bits right by 16 and return the 16 |
-| bit number: |
-| round(L_var1) = extract_h(L_add(L_var1,32768)) |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| L_var1 |
-| 32 bit long signed integer (Word32 ) whose value falls in the |
-| range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 voround (Word32 L_var1)
-{
- Word16 var_out;
- Word32 L_rounded;
- L_rounded = L_add (L_var1, (Word32) 0x00008000L);
- var_out = extract_h (L_rounded);
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_mac |
-| |
-| Purpose : |
-| |
-| Multiply var1 by var2 and shift the result left by 1. Add the 32 bit |
-| result to L_var3 with saturation, return a 32 bit result: |
-| L_mac(L_var3,var1,var2) = L_add(L_var3,L_mult(var1,var2)). |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| L_var3 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_mac (Word32 L_var3, Word16 var1, Word16 var2)
-{
- Word32 L_var_out;
- Word32 L_product;
- L_product = ((var1 * var2) << 1);
- L_var_out = L_add (L_var3, L_product);
- return (L_var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_msu |
-| |
-| Purpose : |
-| |
-| Multiply var1 by var2 and shift the result left by 1. Subtract the 32 |
-| bit result to L_var3 with saturation, return a 32 bit result: |
-| L_msu(L_var3,var1,var2) = L_sub(L_var3,L_mult(var1,var2)). |
-| |
-| Complexity weight : 1 |
-| |
-| Inputs : |
-| |
-| L_var3 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_msu (Word32 L_var3, Word16 var1, Word16 var2)
-{
- Word32 L_var_out;
- Word32 L_product;
- L_product = (var1 * var2)<<1;
- L_var_out = L_sub (L_var3, L_product);
- return (L_var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_add |
-| |
-| Purpose : |
-| |
-| 32 bits addition of the two 32 bits variables (L_var1+L_var2) with |
-| overflow control and saturation; the result is set at +2147483647 when |
-| overflow occurs or at -2147483648 when underflow occurs. |
-| |
-| Complexity weight : 2 |
-| |
-| Inputs : |
-| |
-| L_var1 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| L_var2 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_add (Word32 L_var1, Word32 L_var2)
-{
- Word32 L_var_out;
- L_var_out = L_var1 + L_var2;
- if (((L_var1 ^ L_var2) & MIN_32) == 0)
- {
- if ((L_var_out ^ L_var1) & MIN_32)
- {
- L_var_out = (L_var1 < 0) ? MIN_32 : MAX_32;
- }
- }
- return (L_var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_sub |
-| |
-| Purpose : |
-| |
-| 32 bits subtraction of the two 32 bits variables (L_var1-L_var2) with |
-| overflow control and saturation; the result is set at +2147483647 when |
-| overflow occurs or at -2147483648 when underflow occurs. |
-| |
-| Complexity weight : 2 |
-| |
-| Inputs : |
-| |
-| L_var1 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| L_var2 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_sub (Word32 L_var1, Word32 L_var2)
-{
- Word32 L_var_out;
- L_var_out = L_var1 - L_var2;
- if (((L_var1 ^ L_var2) & MIN_32) != 0)
- {
- if ((L_var_out ^ L_var1) & MIN_32)
- {
- L_var_out = (L_var1 < 0L) ? MIN_32 : MAX_32;
- }
- }
- return (L_var_out);
-}
-
-
-/*___________________________________________________________________________
-| |
-| Function Name : mult_r |
-| |
-| Purpose : |
-| |
-| Same as mult with rounding, i.e.: |
-| mult_r(var1,var2) = extract_l(L_shr(((var1 * var2) + 16384),15)) and |
-| mult_r(-32768,-32768) = 32767. |
-| |
-| Complexity weight : 2 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 mult_r (Word16 var1, Word16 var2)
-{
- Word16 var_out;
- Word32 L_product_arr;
- L_product_arr = (Word32) var1 *(Word32) var2; /* product */
- L_product_arr += (Word32) 0x00004000L; /* round */
- L_product_arr &= (Word32) 0xffff8000L;
- L_product_arr >>= 15; /* shift */
- if (L_product_arr & (Word32) 0x00010000L) /* sign extend when necessary */
- {
- L_product_arr |= (Word32) 0xffff0000L;
- }
- var_out = saturate (L_product_arr);
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_shl |
-| |
-| Purpose : |
-| |
-| Arithmetically shift the 32 bit input L_var1 left var2 positions. Zero |
-| fill the var2 LSB of the result. If var2 is negative, arithmetically |
-| shift L_var1 right by -var2 with sign extension. Saturate the result in |
-| case of underflows or overflows. |
-| |
-| Complexity weight : 2 |
-| |
-| Inputs : |
-| |
-| L_var1 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_shl (Word32 L_var1, Word16 var2)
-{
- Word32 L_var_out = 0L;
- if (var2 <= 0)
- {
- if (var2 < -32)
- var2 = -32;
- L_var_out = (L_var1 >> (Word16)-var2);
- }
- else
- {
- for (; var2 > 0; var2--)
- {
- if (L_var1 > (Word32) 0X3fffffffL)
- {
- L_var_out = MAX_32;
- break;
- }
- else
- {
- if (L_var1 < (Word32) 0xc0000000L)
- {
- //Overflow = 1;
- L_var_out = MIN_32;
- break;
- }
- }
- L_var1 *= 2;
- L_var_out = L_var1;
- }
- }
- return (L_var_out);
-}
-
-static_vo Word32 L_shl2(Word32 L_var1, Word16 var2)
-{
- Word32 L_var_out = 0L;
-
- for (; var2 > 0; var2--)
- {
- if (L_var1 > (Word32) 0X3fffffffL)
- {
- L_var_out = MAX_32;
- break;
- }
- else
- {
- if (L_var1 < (Word32) 0xc0000000L)
- {
- L_var_out = MIN_32;
- break;
- }
- }
- L_var1 <<=1 ;
- L_var_out = L_var1;
- }
- return (L_var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_shr |
-| |
-| Purpose : |
-| |
-| Arithmetically shift the 32 bit input L_var1 right var2 positions with |
-| sign extension. If var2 is negative, arithmetically shift L_var1 left |
-| by -var2 and zero fill the -var2 LSB of the result. Saturate the result |
-| in case of underflows or overflows. |
-| |
-| Complexity weight : 2 |
-| |
-| Inputs : |
-| |
-| L_var1 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_shr (Word32 L_var1, Word16 var2)
-{
- Word32 L_var_out;
- if (var2 < 0)
- {
- if (var2 < -32)
- var2 = -32;
- L_var_out = L_shl2(L_var1, (Word16)-var2);
- }
- else
- {
- if (var2 >= 31)
- {
- L_var_out = (L_var1 < 0L) ? -1 : 0;
- }
- else
- {
- if (L_var1 < 0)
- {
- L_var_out = ~((~L_var1) >> var2);
- }
- else
- {
- L_var_out = L_var1 >> var2;
- }
- }
- }
- return (L_var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : L_shr_r |
-| |
-| Purpose : |
-| |
-| Same as L_shr(L_var1,var2) but with rounding. Saturate the result in |
-| case of underflows or overflows : |
-| - If var2 is greater than zero : |
-| if (L_sub(L_shl(L_shr(L_var1,var2),1),L_shr(L_var1,sub(var2,1))))|
-| is equal to zero |
-| then |
-| L_shr_r(L_var1,var2) = L_shr(L_var1,var2) |
-| else |
-| L_shr_r(L_var1,var2) = L_add(L_shr(L_var1,var2),1) |
-| - If var2 is less than or equal to zero : |
-| L_shr_r(L_var1,var2) = L_shr(L_var1,var2). |
-| |
-| Complexity weight : 3 |
-| |
-| Inputs : |
-| |
-| L_var1 |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| L_var_out |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= var_out <= 0x7fff ffff. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word32 L_shr_r (Word32 L_var1, Word16 var2)
-{
- Word32 L_var_out;
- if (var2 > 31)
- {
- L_var_out = 0;
- }
- else
- {
- L_var_out = L_shr (L_var1, var2);
- if (var2 > 0)
- {
- if ((L_var1 & ((Word32) 1 << (var2 - 1))) != 0)
- {
- L_var_out++;
- }
- }
- }
- return (L_var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : norm_s |
-| |
-| Purpose : |
-| |
-| Produces the number of left shift needed to normalize the 16 bit varia- |
-| ble var1 for positive values on the interval with minimum of 16384 and |
-| maximum of 32767, and for negative values on the interval with minimum |
-| of -32768 and maximum of -16384; in order to normalize the result, the |
-| following operation must be done : |
-| norm_var1 = shl(var1,norm_s(var1)). |
-| |
-| Complexity weight : 15 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0x0000 0000 <= var_out <= 0x0000 000f. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 norm_s (Word16 var1)
-{
- Word16 var_out = 0;
- if (var1 == 0)
- {
- var_out = 0;
- }
- else
- {
- if (var1 == -1)
- {
- var_out = 15;
- }
- else
- {
- if (var1 < 0)
- {
- var1 = (Word16)~var1;
- }
- for (var_out = 0; var1 < 0x4000; var_out++)
- {
- var1 <<= 1;
- }
- }
- }
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : div_s |
-| |
-| Purpose : |
-| |
-| Produces a result which is the fractional integer division of var1 by |
-| var2; var1 and var2 must be positive and var2 must be greater or equal |
-| to var1; the result is positive (leading bit equal to 0) and truncated |
-| to 16 bits. |
-| If var1 = var2 then div(var1,var2) = 32767. |
-| |
-| Complexity weight : 18 |
-| |
-| Inputs : |
-| |
-| var1 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0x0000 0000 <= var1 <= var2 and var2 != 0. |
-| |
-| var2 |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : var1 <= var2 <= 0x0000 7fff and var2 != 0. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0x0000 0000 <= var_out <= 0x0000 7fff. |
-| It's a Q15 value (point between b15 and b14). |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 div_s (Word16 var1, Word16 var2)
-{
- Word16 var_out = 0;
- Word16 iteration;
- Word32 L_num;
- Word32 L_denom;
- if ((var1 < 0) || (var2 < 0))
- {
- var_out = MAX_16;
- return var_out;
- }
- if (var2 == 0)
- {
- var_out = MAX_16;
- return var_out;
- }
- if (var1 == 0)
- {
- var_out = 0;
- }
- else
- {
- if (var1 == var2)
- {
- var_out = MAX_16;
- }
- else
- {
- L_num = L_deposit_l (var1);
- L_denom = L_deposit_l(var2);
- for (iteration = 0; iteration < 15; iteration++)
- {
- var_out <<= 1;
- L_num <<= 1;
- if (L_num >= L_denom)
- {
- L_num -= L_denom;
- var_out += 1;
- }
- }
- }
- }
- return (var_out);
-}
-
-/*___________________________________________________________________________
-| |
-| Function Name : norm_l |
-| |
-| Purpose : |
-| |
-| Produces the number of left shifts needed to normalize the 32 bit varia-|
-| ble L_var1 for positive values on the interval with minimum of |
-| 1073741824 and maximum of 2147483647, and for negative values on the in-|
-| terval with minimum of -2147483648 and maximum of -1073741824; in order |
-| to normalize the result, the following operation must be done : |
-| norm_L_var1 = L_shl(L_var1,norm_l(L_var1)). |
-| |
-| Complexity weight : 30 |
-| |
-| Inputs : |
-| |
-| L_var1 |
-| 32 bit long signed integer (Word32) whose value falls in the |
-| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
-| |
-| Outputs : |
-| |
-| none |
-| |
-| Return Value : |
-| |
-| var_out |
-| 16 bit short signed integer (Word16) whose value falls in the |
-| range : 0x0000 0000 <= var_out <= 0x0000 001f. |
-|___________________________________________________________________________|
-*/
-
-static_vo Word16 norm_l (Word32 L_var1)
-{
- Word16 var_out = 0;
- if (L_var1 != 0)
- {
- var_out = 31;
- if (L_var1 != (Word32) 0xffffffffL)
- {
- L_var1 ^= (L_var1 >>31);
- for (var_out = 0; L_var1 < (Word32) 0x40000000L; var_out++)
- {
- L_var1 <<= 1;
- }
- }
- }
- return (var_out);
-}
-
-#endif //__BASIC_OP_H__
-
+/*
+ ** 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.
+ */
+
+
+#ifndef __BASIC_OP_H__
+#define __BASIC_OP_H__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "typedef.h"
+
+#define MAX_32 (Word32)0x7fffffffL
+#define MIN_32 (Word32)0x80000000L
+
+#define MAX_16 (Word16)+32767 /* 0x7fff */
+#define MIN_16 (Word16)-32768 /* 0x8000 */
+
+
+#ifdef LINUX
+#define static_vo static __inline__
+#else
+#define static_vo static __inline
+#endif
+
+#define saturate(L_var1) (((L_var1) > 0X00007fffL) ? (MAX_16): (((L_var1) < (Word32) 0xffff8000L) ? (MIN_16): ((L_var1) & 0xffff)))
+
+#define abs_s(x) ((Word16)(((x) != MIN_16) ? (((x) >= 0) ? (x) : (-(x))) : MAX_16)) /* Short abs, 1 */
+#define L_deposit_h(x) (((Word32)(x)) << 16) /* 16 bit var1 -> MSB, 2 */
+#define L_deposit_l(x) ((Word32)(x)) /* 16 bit var1 -> LSB, 2 */
+#define L_abs(x) (((x) != MIN_32) ? (((x) >= 0) ? (x) : (-(x))) : MAX_32) /* Long abs, 3*/
+#define negate(var1) ((Word16)(((var1) == MIN_16) ? MAX_16 : (-(var1)))) /* Short negate, 1*/
+#define L_negate(L_var1) (((L_var1) == (MIN_32)) ? (MAX_32) : (-(L_var1))) /* Long negate, 2*/
+
+
+#define extract_h(a) ((Word16)(a >> 16))
+#define extract_l(x) (Word16)((x))
+#define add1(a,b) (a + b)
+#define vo_L_msu(a,b,c) ( a - (( b * c ) << 1) )
+#define vo_mult32(a, b) ((a) * (b))
+#define vo_mult(a,b) (( a * b ) >> 15 )
+#define vo_L_mult(a,b) (((a) * (b)) << 1)
+#define vo_shr_r(var1, var2) ((var1+((Word16)(1L<<(var2-1))))>>var2)
+#define vo_sub(a,b) (a - b)
+#define vo_L_deposit_h(a) ((Word32)((a) << 16))
+#define vo_round(a) ((a + 0x00008000) >> 16)
+#define vo_extract_l(a) ((Word16)(a))
+#define vo_L_add(a,b) (a + b)
+#define vo_L_sub(a,b) (a - b)
+#define vo_mult_r(a,b) ((( a * b ) + 0x4000 ) >> 15 )
+#define vo_negate(a) (-a)
+#define vo_L_shr_r(L_var1, var2) ((L_var1+((Word32)(1L<<(var2-1))))>>var2)
+
+
+/*___________________________________________________________________________
+| |
+| Prototypes for basic arithmetic operators |
+|___________________________________________________________________________|
+*/
+static_vo Word16 add (Word16 var1, Word16 var2); /* Short add,1 */
+static_vo Word16 sub (Word16 var1, Word16 var2); /* Short sub,1 */
+static_vo Word16 shl (Word16 var1, Word16 var2); /* Short shift left, 1 */
+static_vo Word16 shr (Word16 var1, Word16 var2); /* Short shift right, 1 */
+static_vo Word16 mult (Word16 var1, Word16 var2); /* Short mult, 1 */
+static_vo Word32 L_mult (Word16 var1, Word16 var2); /* Long mult, 1 */
+static_vo Word16 voround (Word32 L_var1); /* Round, 1 */
+static_vo Word32 L_mac (Word32 L_var3, Word16 var1, Word16 var2); /* Mac, 1 */
+static_vo Word32 L_msu (Word32 L_var3, Word16 var1, Word16 var2); /* Msu, 1 */
+static_vo Word32 L_add (Word32 L_var1, Word32 L_var2); /* Long add, 2 */
+static_vo Word32 L_sub (Word32 L_var1, Word32 L_var2); /* Long sub, 2 */
+static_vo Word16 mult_r (Word16 var1, Word16 var2); /* Mult with round, 2 */
+static_vo Word32 L_shl2(Word32 L_var1, Word16 var2); /* var2 > 0*/
+static_vo Word32 L_shl (Word32 L_var1, Word16 var2); /* Long shift left, 2 */
+static_vo Word32 L_shr (Word32 L_var1, Word16 var2); /* Long shift right, 2*/
+static_vo Word32 L_shr_r (Word32 L_var1, Word16 var2); /* Long shift right with round, 3 */
+static_vo Word16 norm_s (Word16 var1); /* Short norm, 15 */
+static_vo Word16 div_s (Word16 var1, Word16 var2); /* Short division, 18 */
+static_vo Word16 norm_l (Word32 L_var1); /* Long norm, 30 */
+
+/*___________________________________________________________________________
+| |
+| Functions |
+|___________________________________________________________________________|
+*/
+/*___________________________________________________________________________
+| |
+| Function Name : add |
+| |
+| Purpose : |
+| |
+| Performs the addition (var1+var2) with overflow control and saturation;|
+| the 16 bit result is set at +32767 when overflow occurs or at -32768 |
+| when underflow occurs. |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
+|___________________________________________________________________________|
+*/
+static_vo Word16 add (Word16 var1, Word16 var2)
+{
+ Word16 var_out;
+ Word32 L_sum;
+ L_sum = (Word32) var1 + var2;
+ var_out = saturate (L_sum);
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : sub |
+| |
+| Purpose : |
+| |
+| Performs the subtraction (var1+var2) with overflow control and satu- |
+| ration; the 16 bit result is set at +32767 when overflow occurs or at |
+| -32768 when underflow occurs. |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 sub (Word16 var1, Word16 var2)
+{
+ Word16 var_out;
+ Word32 L_diff;
+ L_diff = (Word32) var1 - var2;
+ var_out = saturate (L_diff);
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : shl |
+| |
+| Purpose : |
+| |
+| Arithmetically shift the 16 bit input var1 left var2 positions.Zero fill|
+| the var2 LSB of the result. If var2 is negative, arithmetically shift |
+| var1 right by -var2 with sign extension. Saturate the result in case of |
+| underflows or overflows. |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 shl (Word16 var1, Word16 var2)
+{
+ Word16 var_out;
+ Word32 result;
+ if (var2 < 0)
+ {
+ if (var2 < -16)
+ var2 = -16;
+ var_out = var1 >> ((Word16)-var2);
+ }
+ else
+ {
+ result = (Word32) var1 *((Word32) 1 << var2);
+ if ((var2 > 15 && var1 != 0) || (result != (Word32) ((Word16) result)))
+ {
+ var_out = (Word16)((var1 > 0) ? MAX_16 : MIN_16);
+ }
+ else
+ {
+ var_out = extract_l (result);
+ }
+ }
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : shr |
+| |
+| Purpose : |
+| |
+| Arithmetically shift the 16 bit input var1 right var2 positions with |
+| sign extension. If var2 is negative, arithmetically shift var1 left by |
+| -var2 with sign extension. Saturate the result in case of underflows or |
+| overflows. |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 shr (Word16 var1, Word16 var2)
+{
+ Word16 var_out;
+ if (var2 < 0)
+ {
+ if (var2 < -16)
+ var2 = -16;
+ var_out = shl(var1, (Word16)-var2);
+ }
+ else
+ {
+ if (var2 >= 15)
+ {
+ var_out = (Word16)((var1 < 0) ? -1 : 0);
+ }
+ else
+ {
+ if (var1 < 0)
+ {
+ var_out = (Word16)(~((~var1) >> var2));
+ }
+ else
+ {
+ var_out = (Word16)(var1 >> var2);
+ }
+ }
+ }
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : mult |
+| |
+| Purpose : |
+| |
+| Performs the multiplication of var1 by var2 and gives a 16 bit result |
+| which is scaled i.e.: |
+| mult(var1,var2) = extract_l(L_shr((var1 times var2),15)) and |
+| mult(-32768,-32768) = 32767. |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 mult (Word16 var1, Word16 var2)
+{
+ Word16 var_out;
+ Word32 L_product;
+ L_product = (Word32) var1 *(Word32) var2;
+ L_product = (L_product & (Word32) 0xffff8000L) >> 15;
+ if (L_product & (Word32) 0x00010000L)
+ L_product = L_product | (Word32) 0xffff0000L;
+ var_out = saturate (L_product);
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_mult |
+| |
+| Purpose : |
+| |
+| L_mult is the 32 bit result of the multiplication of var1 times var2 |
+| with one shift left i.e.: |
+| L_mult(var1,var2) = L_shl((var1 times var2),1) and |
+| L_mult(-32768,-32768) = 2147483647. |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_mult (Word16 var1, Word16 var2)
+{
+ Word32 L_var_out;
+ L_var_out = (Word32) var1 *(Word32) var2;
+ if (L_var_out != (Word32) 0x40000000L)
+ {
+ L_var_out *= 2;
+ }
+ else
+ {
+ L_var_out = MAX_32;
+ }
+ return (L_var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : round |
+| |
+| Purpose : |
+| |
+| Round the lower 16 bits of the 32 bit input number into the MS 16 bits |
+| with saturation. Shift the resulting bits right by 16 and return the 16 |
+| bit number: |
+| round(L_var1) = extract_h(L_add(L_var1,32768)) |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| L_var1 |
+| 32 bit long signed integer (Word32 ) whose value falls in the |
+| range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 voround (Word32 L_var1)
+{
+ Word16 var_out;
+ Word32 L_rounded;
+ L_rounded = L_add (L_var1, (Word32) 0x00008000L);
+ var_out = extract_h (L_rounded);
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_mac |
+| |
+| Purpose : |
+| |
+| Multiply var1 by var2 and shift the result left by 1. Add the 32 bit |
+| result to L_var3 with saturation, return a 32 bit result: |
+| L_mac(L_var3,var1,var2) = L_add(L_var3,L_mult(var1,var2)). |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| L_var3 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_mac (Word32 L_var3, Word16 var1, Word16 var2)
+{
+ Word32 L_var_out;
+ Word32 L_product;
+ L_product = ((var1 * var2) << 1);
+ L_var_out = L_add (L_var3, L_product);
+ return (L_var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_msu |
+| |
+| Purpose : |
+| |
+| Multiply var1 by var2 and shift the result left by 1. Subtract the 32 |
+| bit result to L_var3 with saturation, return a 32 bit result: |
+| L_msu(L_var3,var1,var2) = L_sub(L_var3,L_mult(var1,var2)). |
+| |
+| Complexity weight : 1 |
+| |
+| Inputs : |
+| |
+| L_var3 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_msu (Word32 L_var3, Word16 var1, Word16 var2)
+{
+ Word32 L_var_out;
+ Word32 L_product;
+ L_product = (var1 * var2)<<1;
+ L_var_out = L_sub (L_var3, L_product);
+ return (L_var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_add |
+| |
+| Purpose : |
+| |
+| 32 bits addition of the two 32 bits variables (L_var1+L_var2) with |
+| overflow control and saturation; the result is set at +2147483647 when |
+| overflow occurs or at -2147483648 when underflow occurs. |
+| |
+| Complexity weight : 2 |
+| |
+| Inputs : |
+| |
+| L_var1 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| L_var2 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_add (Word32 L_var1, Word32 L_var2)
+{
+ Word32 L_var_out;
+ L_var_out = L_var1 + L_var2;
+ if (((L_var1 ^ L_var2) & MIN_32) == 0)
+ {
+ if ((L_var_out ^ L_var1) & MIN_32)
+ {
+ L_var_out = (L_var1 < 0) ? MIN_32 : MAX_32;
+ }
+ }
+ return (L_var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_sub |
+| |
+| Purpose : |
+| |
+| 32 bits subtraction of the two 32 bits variables (L_var1-L_var2) with |
+| overflow control and saturation; the result is set at +2147483647 when |
+| overflow occurs or at -2147483648 when underflow occurs. |
+| |
+| Complexity weight : 2 |
+| |
+| Inputs : |
+| |
+| L_var1 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| L_var2 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_sub (Word32 L_var1, Word32 L_var2)
+{
+ Word32 L_var_out;
+ L_var_out = L_var1 - L_var2;
+ if (((L_var1 ^ L_var2) & MIN_32) != 0)
+ {
+ if ((L_var_out ^ L_var1) & MIN_32)
+ {
+ L_var_out = (L_var1 < 0L) ? MIN_32 : MAX_32;
+ }
+ }
+ return (L_var_out);
+}
+
+
+/*___________________________________________________________________________
+| |
+| Function Name : mult_r |
+| |
+| Purpose : |
+| |
+| Same as mult with rounding, i.e.: |
+| mult_r(var1,var2) = extract_l(L_shr(((var1 * var2) + 16384),15)) and |
+| mult_r(-32768,-32768) = 32767. |
+| |
+| Complexity weight : 2 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var_out <= 0x0000 7fff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 mult_r (Word16 var1, Word16 var2)
+{
+ Word16 var_out;
+ Word32 L_product_arr;
+ L_product_arr = (Word32) var1 *(Word32) var2; /* product */
+ L_product_arr += (Word32) 0x00004000L; /* round */
+ L_product_arr &= (Word32) 0xffff8000L;
+ L_product_arr >>= 15; /* shift */
+ if (L_product_arr & (Word32) 0x00010000L) /* sign extend when necessary */
+ {
+ L_product_arr |= (Word32) 0xffff0000L;
+ }
+ var_out = saturate (L_product_arr);
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_shl |
+| |
+| Purpose : |
+| |
+| Arithmetically shift the 32 bit input L_var1 left var2 positions. Zero |
+| fill the var2 LSB of the result. If var2 is negative, arithmetically |
+| shift L_var1 right by -var2 with sign extension. Saturate the result in |
+| case of underflows or overflows. |
+| |
+| Complexity weight : 2 |
+| |
+| Inputs : |
+| |
+| L_var1 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_shl (Word32 L_var1, Word16 var2)
+{
+ Word32 L_var_out = 0L;
+ if (var2 <= 0)
+ {
+ if (var2 < -32)
+ var2 = -32;
+ L_var_out = (L_var1 >> (Word16)-var2);
+ }
+ else
+ {
+ for (; var2 > 0; var2--)
+ {
+ if (L_var1 > (Word32) 0X3fffffffL)
+ {
+ L_var_out = MAX_32;
+ break;
+ }
+ else
+ {
+ if (L_var1 < (Word32) 0xc0000000L)
+ {
+ //Overflow = 1;
+ L_var_out = MIN_32;
+ break;
+ }
+ }
+ L_var1 *= 2;
+ L_var_out = L_var1;
+ }
+ }
+ return (L_var_out);
+}
+
+static_vo Word32 L_shl2(Word32 L_var1, Word16 var2)
+{
+ Word32 L_var_out = 0L;
+
+ for (; var2 > 0; var2--)
+ {
+ if (L_var1 > (Word32) 0X3fffffffL)
+ {
+ L_var_out = MAX_32;
+ break;
+ }
+ else
+ {
+ if (L_var1 < (Word32) 0xc0000000L)
+ {
+ L_var_out = MIN_32;
+ break;
+ }
+ }
+ L_var1 <<=1 ;
+ L_var_out = L_var1;
+ }
+ return (L_var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_shr |
+| |
+| Purpose : |
+| |
+| Arithmetically shift the 32 bit input L_var1 right var2 positions with |
+| sign extension. If var2 is negative, arithmetically shift L_var1 left |
+| by -var2 and zero fill the -var2 LSB of the result. Saturate the result |
+| in case of underflows or overflows. |
+| |
+| Complexity weight : 2 |
+| |
+| Inputs : |
+| |
+| L_var1 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_shr (Word32 L_var1, Word16 var2)
+{
+ Word32 L_var_out;
+ if (var2 < 0)
+ {
+ if (var2 < -32)
+ var2 = -32;
+ L_var_out = L_shl2(L_var1, (Word16)-var2);
+ }
+ else
+ {
+ if (var2 >= 31)
+ {
+ L_var_out = (L_var1 < 0L) ? -1 : 0;
+ }
+ else
+ {
+ if (L_var1 < 0)
+ {
+ L_var_out = ~((~L_var1) >> var2);
+ }
+ else
+ {
+ L_var_out = L_var1 >> var2;
+ }
+ }
+ }
+ return (L_var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : L_shr_r |
+| |
+| Purpose : |
+| |
+| Same as L_shr(L_var1,var2) but with rounding. Saturate the result in |
+| case of underflows or overflows : |
+| - If var2 is greater than zero : |
+| if (L_sub(L_shl(L_shr(L_var1,var2),1),L_shr(L_var1,sub(var2,1))))|
+| is equal to zero |
+| then |
+| L_shr_r(L_var1,var2) = L_shr(L_var1,var2) |
+| else |
+| L_shr_r(L_var1,var2) = L_add(L_shr(L_var1,var2),1) |
+| - If var2 is less than or equal to zero : |
+| L_shr_r(L_var1,var2) = L_shr(L_var1,var2). |
+| |
+| Complexity weight : 3 |
+| |
+| Inputs : |
+| |
+| L_var1 |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| L_var_out |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= var_out <= 0x7fff ffff. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word32 L_shr_r (Word32 L_var1, Word16 var2)
+{
+ Word32 L_var_out;
+ if (var2 > 31)
+ {
+ L_var_out = 0;
+ }
+ else
+ {
+ L_var_out = L_shr (L_var1, var2);
+ if (var2 > 0)
+ {
+ if ((L_var1 & ((Word32) 1 << (var2 - 1))) != 0)
+ {
+ L_var_out++;
+ }
+ }
+ }
+ return (L_var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : norm_s |
+| |
+| Purpose : |
+| |
+| Produces the number of left shift needed to normalize the 16 bit varia- |
+| ble var1 for positive values on the interval with minimum of 16384 and |
+| maximum of 32767, and for negative values on the interval with minimum |
+| of -32768 and maximum of -16384; in order to normalize the result, the |
+| following operation must be done : |
+| norm_var1 = shl(var1,norm_s(var1)). |
+| |
+| Complexity weight : 15 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0x0000 0000 <= var_out <= 0x0000 000f. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 norm_s (Word16 var1)
+{
+ Word16 var_out = 0;
+ if (var1 == 0)
+ {
+ var_out = 0;
+ }
+ else
+ {
+ if (var1 == -1)
+ {
+ var_out = 15;
+ }
+ else
+ {
+ if (var1 < 0)
+ {
+ var1 = (Word16)~var1;
+ }
+ for (var_out = 0; var1 < 0x4000; var_out++)
+ {
+ var1 <<= 1;
+ }
+ }
+ }
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : div_s |
+| |
+| Purpose : |
+| |
+| Produces a result which is the fractional integer division of var1 by |
+| var2; var1 and var2 must be positive and var2 must be greater or equal |
+| to var1; the result is positive (leading bit equal to 0) and truncated |
+| to 16 bits. |
+| If var1 = var2 then div(var1,var2) = 32767. |
+| |
+| Complexity weight : 18 |
+| |
+| Inputs : |
+| |
+| var1 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0x0000 0000 <= var1 <= var2 and var2 != 0. |
+| |
+| var2 |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : var1 <= var2 <= 0x0000 7fff and var2 != 0. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0x0000 0000 <= var_out <= 0x0000 7fff. |
+| It's a Q15 value (point between b15 and b14). |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 div_s (Word16 var1, Word16 var2)
+{
+ Word16 var_out = 0;
+ Word16 iteration;
+ Word32 L_num;
+ Word32 L_denom;
+ if ((var1 < 0) || (var2 < 0))
+ {
+ var_out = MAX_16;
+ return var_out;
+ }
+ if (var2 == 0)
+ {
+ var_out = MAX_16;
+ return var_out;
+ }
+ if (var1 == 0)
+ {
+ var_out = 0;
+ }
+ else
+ {
+ if (var1 == var2)
+ {
+ var_out = MAX_16;
+ }
+ else
+ {
+ L_num = L_deposit_l (var1);
+ L_denom = L_deposit_l(var2);
+ for (iteration = 0; iteration < 15; iteration++)
+ {
+ var_out <<= 1;
+ L_num <<= 1;
+ if (L_num >= L_denom)
+ {
+ L_num -= L_denom;
+ var_out += 1;
+ }
+ }
+ }
+ }
+ return (var_out);
+}
+
+/*___________________________________________________________________________
+| |
+| Function Name : norm_l |
+| |
+| Purpose : |
+| |
+| Produces the number of left shifts needed to normalize the 32 bit varia-|
+| ble L_var1 for positive values on the interval with minimum of |
+| 1073741824 and maximum of 2147483647, and for negative values on the in-|
+| terval with minimum of -2147483648 and maximum of -1073741824; in order |
+| to normalize the result, the following operation must be done : |
+| norm_L_var1 = L_shl(L_var1,norm_l(L_var1)). |
+| |
+| Complexity weight : 30 |
+| |
+| Inputs : |
+| |
+| L_var1 |
+| 32 bit long signed integer (Word32) whose value falls in the |
+| range : 0x8000 0000 <= var1 <= 0x7fff ffff. |
+| |
+| Outputs : |
+| |
+| none |
+| |
+| Return Value : |
+| |
+| var_out |
+| 16 bit short signed integer (Word16) whose value falls in the |
+| range : 0x0000 0000 <= var_out <= 0x0000 001f. |
+|___________________________________________________________________________|
+*/
+
+static_vo Word16 norm_l (Word32 L_var1)
+{
+ Word16 var_out = 0;
+ if (L_var1 != 0)
+ {
+ var_out = 31;
+ if (L_var1 != (Word32) 0xffffffffL)
+ {
+ L_var1 ^= (L_var1 >>31);
+ for (var_out = 0; L_var1 < (Word32) 0x40000000L; var_out++)
+ {
+ L_var1 <<= 1;
+ }
+ }
+ }
+ return (var_out);
+}
+
+#endif //__BASIC_OP_H__
+
generated by cgit v1.1 at 2024-05-17 03:39:31 +0000