diff options
Diffstat (limited to 'opencore/codecs_v2/audio/gsm_amr/amr_wb/dec/src/median5.cpp')
-rw-r--r-- | opencore/codecs_v2/audio/gsm_amr/amr_wb/dec/src/median5.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/opencore/codecs_v2/audio/gsm_amr/amr_wb/dec/src/median5.cpp b/opencore/codecs_v2/audio/gsm_amr/amr_wb/dec/src/median5.cpp new file mode 100644 index 0000000..32d10af --- /dev/null +++ b/opencore/codecs_v2/audio/gsm_amr/amr_wb/dec/src/median5.cpp @@ -0,0 +1,172 @@ +/* ------------------------------------------------------------------ + * 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. +****************************************************************************************/ +/* +------------------------------------------------------------------------------ + + + + Filename: median5.cpp + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + INPUT + X[-2:2] 16-bit integers. + + RETURN VALUE + The median of {X[-2], X[-1],..., X[2]}. + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Returns the median of the set {X[-2], X[-1],..., X[2]}, + whose elements are 16-bit integers. + +------------------------------------------------------------------------------ + REQUIREMENTS + + +------------------------------------------------------------------------------ + REFERENCES + +------------------------------------------------------------------------------ + PSEUDO-CODE + +------------------------------------------------------------------------------ +*/ + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ + +#include "pv_amr_wb_type_defs.h" +#include "pvamrwbdecoder_basic_op.h" +#include "pvamrwbdecoder_acelp.h" +#include "pvamrwb_math_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 +----------------------------------------------------------------------------*/ + +int16 median5(int16 x[]) +{ + int16 x1, x2, x3, x4, x5; + int16 tmp; + + x1 = x[-2]; + x2 = x[-1]; + x3 = x[0]; + x4 = x[1]; + x5 = x[2]; + + + + if (x2 < x1) + { + tmp = x1; + x1 = x2; + x2 = tmp; + } + if (x3 < x1) + { + tmp = x1; + x1 = x3; + x3 = tmp; + } + if (x4 < x1) + { + tmp = x1; + x1 = x4; + x4 = tmp; + } + if (x5 < x1) + { + x5 = x1; + } + if (x3 < x2) + { + tmp = x2; + x2 = x3; + x3 = tmp; + } + if (x4 < x2) + { + tmp = x2; + x2 = x4; + x4 = tmp; + } + if (x5 < x2) + { + x5 = x2; + } + if (x4 < x3) + { + x3 = x4; + } + if (x5 < x3) + { + x3 = x5; + } + return (x3); +} + + |