| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * 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. |
| * ------------------------------------------------------------------- |
| */ |
| /**************************************************************************************** |
| Portions of this file are derived from the following 3GPP standard: |
| |
| 3GPP TS 26.173 |
| ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec |
| Available from http://www.3gpp.org |
| |
| (C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) |
| Permission to distribute, modify and use this file under the standard license |
| terms listed above has been obtained from the copyright holder. |
| ****************************************************************************************/ |
| /* |
| ------------------------------------------------------------------------------ |
| |
| |
| |
| Pathname: ./src/pvamrwbdecoder_basic_op.h |
| |
| Date: 05/07/2007 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| |
| #ifndef PVAMRWBDECODER_BASIC_OP_H |
| #define PVAMRWBDECODER_BASIC_OP_H |
| |
| |
| #include "normalize_amr_wb.h" |
| |
| |
| #define MAX_32 (int32)0x7fffffffL |
| #define MIN_32 (int32)0x80000000L |
| |
| #define MAX_16 ((int16)+32767) /* 0x7fff */ |
| #define MIN_16 ((int16)-32768) /* 0x8000 */ |
| |
| |
| |
| |
| /*---------------------------------------------------------------------------- |
| Function Name : negate_int16 |
| |
| Negate var1 with saturation, saturate in the case where input is -32768: |
| negate(var1) = sub(0,var1). |
| |
| Inputs : |
| var1 |
| 16 bit short signed integer (int16) whose value falls in the |
| range : 0x8000 <= var1 <= 0x7fff. |
| |
| Outputs : |
| none |
| |
| Return Value : |
| 16 bit short signed integer (int16) whose value falls in the |
| range : 0x8000 <= var_out <= 0x7fff. |
| ----------------------------------------------------------------------------*/ |
| |
| __inline int16 negate_int16(int16 var1) |
| { |
| return (((var1 == MIN_16) ? MAX_16 : -var1)); |
| } |
| |
| |
| /*---------------------------------------------------------------------------- |
| |
| Function Name : shl_int16 |
| |
| 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. |
| |
| Inputs : |
| var1 |
| 16 bit short signed integer (int16) whose value falls in the |
| range : 0x8000 <= var1 <= 0x7fff. |
| |
| var2 |
| 16 bit short signed integer (int16) whose value falls in the |
| range : 0x8000 <= var1 <= 0x7fff. |
| |
| Return Value : |
| var_out |
| 16 bit short signed integer (int16) whose value falls in the |
| range : 0x8000 <= var_out <= 0x7fff. |
| ----------------------------------------------------------------------------*/ |
| |
| __inline int16 shl_int16(int16 var1, int16 var2) |
| { |
| int16 var_out; |
| |
| if (var2 < 0) |
| { |
| var2 = (-var2) & (0xf); |
| var_out = var1 >> var2; |
| } |
| else |
| { |
| var2 &= 0xf; |
| var_out = var1 << var2; |
| if (var_out >> var2 != var1) |
| { |
| var_out = (var1 >> 15) ^ MAX_16; |
| } |
| } |
| return (var_out); |
| } |
| |
| |
| /*---------------------------------------------------------------------------- |
| |
| Function Name : shl_int32 |
| |
| 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. |
| |
| Inputs : |
| L_var1 32 bit long signed integer (int32) whose value falls in the |
| range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. |
| |
| var2 |
| 16 bit short signed integer (int16) whose value falls in the |
| range : 8000 <= var2 <= 7fff. |
| Return Value : |
| 32 bit long signed integer (int32) whose value falls in the |
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
| |
| ----------------------------------------------------------------------------*/ |
| |
| __inline int32 shl_int32(int32 L_var1, int16 var2) |
| { |
| int32 L_var_out; |
| |
| if (var2 > 0) |
| { |
| L_var_out = L_var1 << var2; |
| if (L_var_out >> var2 != L_var1) |
| { |
| L_var_out = (L_var1 >> 31) ^ MAX_32; |
| } |
| } |
| else |
| { |
| var2 = (-var2) & (0xf); |
| L_var_out = L_var1 >> var2; |
| } |
| |
| return (L_var_out); |
| } |
| |
| |
| /*---------------------------------------------------------------------------- |
| |
| Function Name : shr_int32 |
| |
| 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. |
| |
| Inputs : |
| L_var1 32 bit long signed integer (int32) whose value falls in the |
| range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. |
| |
| var2 |
| 16 bit short signed integer (int16) whose value falls in the |
| range : 8000 <= var2 <= 7fff. |
| Return Value : |
| 32 bit long signed integer (int32) whose value falls in the |
| range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
| |
| ----------------------------------------------------------------------------*/ |
| |
| __inline int32 shr_int32(int32 L_var1, int16 var2) |
| { |
| int32 L_var_out; |
| |
| if (var2 >= 0) |
| { |
| L_var_out = L_var1 >> (var2 & 0x1f); |
| } |
| else |
| { |
| var2 = (int16)(-var2); |
| var2 &= 0x1f; |
| L_var_out = L_var1 << var2; |
| if (L_var_out >> var2 != L_var1) |
| { |
| L_var_out = (L_var1 >> 31) ^ MAX_32; |
| } |
| |
| } |
| return (L_var_out); |
| } |
| |
| |
| |
| |
| |
| |
| #if defined(PV_ARM_V5) |
| |
| #include "pvamrwbdecoder_basic_op_armv5.h" |
| |
| #elif defined(PV_ARM_GCC_V5) |
| |
| #include "pvamrwbdecoder_basic_op_gcc_armv5.h" |
| |
| #else |
| |
| #ifndef C_EQUIVALENT |
| #define C_EQUIVALENT // default to C_EQUIVALENT |
| #endif |
| |
| #include "pvamrwbdecoder_basic_op_cequivalent.h" |
| |
| #endif |
| |
| |
| #endif /* PVAMRWBDECODER_BASIC_OP_H */ |
| |