From e28f3aee8eca3cc7a10935f63899d5c4f6ba1ede Mon Sep 17 00:00:00 2001 From: Jinkun Jang Date: Wed, 13 Mar 2013 01:44:24 +0900 Subject: Tizen 2.1 base --- .../audio/gsm_amr/amr_nb/common/src/norm_l.cpp | 203 +++++++++++++++++++++ 1 file changed, 203 insertions(+) create mode 100644 opencore/codecs_v2/audio/gsm_amr/amr_nb/common/src/norm_l.cpp (limited to 'opencore/codecs_v2/audio/gsm_amr/amr_nb/common/src/norm_l.cpp') diff --git a/opencore/codecs_v2/audio/gsm_amr/amr_nb/common/src/norm_l.cpp b/opencore/codecs_v2/audio/gsm_amr/amr_nb/common/src/norm_l.cpp new file mode 100644 index 0000000..e690246 --- /dev/null +++ b/opencore/codecs_v2/audio/gsm_amr/amr_nb/common/src/norm_l.cpp @@ -0,0 +1,203 @@ +/* ------------------------------------------------------------------ + * 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 26.073 + ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec + Available from http://www.3gpp.org + +(C) 2004, 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. +****************************************************************************************/ +/* + Filename: norm_l.cpp + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + Inputs: + L_var1 = 32 bit long signed integer (Word32) whose value falls + in the range : 0x8000 0000 <= var1 <= 0x7fff ffff. + + Local Stores/Buffers/Pointers Needed: + None + + Global Stores/Buffers/Pointers Needed: + None + + Outputs: + var_out = number of left shifts need to normalize input (Word16) + + Pointers and Buffers Modified: + None + + Local Stores Modified: + None + + Global Stores Modified: + None + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + This function produces the number of left shifts needed to normalize the 32 + bit variable L_var1 for positive values on the interval with minimum of + 0x40000000 and maximum of 0x7fffffff, and for negative values on the interval + with minimum of 0x80000000 and maximum of 0xc0000000. Note that when L_var1 + is equal to zero, the output var_out is set to zero. + +------------------------------------------------------------------------------ + REQUIREMENTS + + None + +------------------------------------------------------------------------------ + REFERENCES + + [1] basicop2.c, ETS Version 2.0.0, February 8, 1999 + +------------------------------------------------------------------------------ + PSEUDO-CODE + +Word16 norm_l (Word32 L_var1) +{ + Word16 var_out; + + if (L_var1 == 0) + { + var_out = 0; + } + else + { + if (L_var1 == (Word32) 0xffffffffL) + { + var_out = 31; + } + else + { + if (L_var1 < 0) + { + L_var1 = ~L_var1; + } + for (var_out = 0; L_var1 < (Word32) 0x40000000L; var_out++) + { + L_var1 <<= 1; + } + } + } + +#if (WMOPS) + multiCounter[currCounter].norm_l++; +#endif + return (var_out); +} + +------------------------------------------------------------------------------ +*/ + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "basic_op.h" + +/*---------------------------------------------------------------------------- +; MACROS +; Define module specific macros here +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; DEFINES +; Include all pre-processor statements here. Include conditional +; compile variables also. +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL FUNCTION DEFINITIONS +; Function Prototype declaration +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL STORE/BUFFER/POINTER DEFINITIONS +; Variable declaration - defined here and used outside this module +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; EXTERNAL FUNCTION REFERENCES +; Declare functions defined elsewhere and referenced in this module +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES +; Declare variables used in this module but defined elsewhere +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; FUNCTION CODE +----------------------------------------------------------------------------*/ +#if !( defined(PV_ARM_V5) || defined(PV_ARM_GCC_V5) ) +OSCL_EXPORT_REF Word16 norm_l(register Word32 L_var1) +{ + /*---------------------------------------------------------------------------- + ; Define all local variables + ----------------------------------------------------------------------------*/ + register Word16 var_out = 0; + + /*---------------------------------------------------------------------------- + ; Function body here + ----------------------------------------------------------------------------*/ + + if (L_var1) + { + + Word32 y = L_var1 - (L_var1 < 0); + L_var1 = y ^(y >> 31); + + + while (!(0x40000000L & L_var1)) + { + var_out++; + if ((0x20000000L & L_var1)) + { + break; + } + var_out++; + if ((0x10000000L & L_var1)) + { + break; + } + var_out++; + if ((0x08000000L & L_var1)) + { + break; + } + var_out++; + L_var1 <<= 4; + } + } + + /*---------------------------------------------------------------------------- + ; Return nothing or data or data pointer + ----------------------------------------------------------------------------*/ + + + return (var_out); +} +#endif -- cgit v1.2.3