| /* ------------------------------------------------------------------ |
| * 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: voice_factor.cpp |
| |
| Date: 05/08/2007 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| int16 exc[], (i) Q_exc : pitch excitation |
| int16 Q_exc, (i) : exc format |
| int16 gain_pit, (i) Q14 : gain of pitch |
| int16 code[], (i) Q9 : Fixed codebook excitation |
| int16 gain_code, (i) Q0 : gain of code |
| int16 L_subfr (i) : subframe length |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| Find the voicing factor (1=voice to -1=unvoiced). |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #include "pv_amr_wb_type_defs.h" |
| #include "pvamrwbdecoder_basic_op.h" |
| #include "pvamrwb_math_op.h" |
| #include "pvamrwbdecoder_acelp.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 voice_factor( /* (o) Q15 : factor (-1=unvoiced to 1=voiced) */ |
| int16 exc[], /* (i) Q_exc : pitch excitation */ |
| int16 Q_exc, /* (i) : exc format */ |
| int16 gain_pit, /* (i) Q14 : gain of pitch */ |
| int16 code[], /* (i) Q9 : Fixed codebook excitation */ |
| int16 gain_code, /* (i) Q0 : gain of code */ |
| int16 L_subfr /* (i) : subframe length */ |
| ) |
| { |
| int16 i, tmp, exp, ener1, exp1, ener2, exp2; |
| int32 L_tmp; |
| |
| ener1 = extract_h(Dot_product12(exc, exc, L_subfr, &exp1)); |
| exp1 = sub_int16(exp1, Q_exc << 1); |
| L_tmp = mul_16by16_to_int32(gain_pit, gain_pit); |
| exp = normalize_amr_wb(L_tmp); |
| |
| tmp = (int16)((L_tmp << exp) >> 16); |
| ener1 = mult_int16(ener1, tmp); |
| exp1 -= (exp + 10); /* 10 -> gain_pit Q14 to Q9 */ |
| |
| ener2 = extract_h(Dot_product12(code, code, L_subfr, &exp2)); |
| |
| exp = norm_s(gain_code); |
| tmp = shl_int16(gain_code, exp); |
| tmp = mult_int16(tmp, tmp); |
| ener2 = mult_int16(ener2, tmp); |
| exp2 -= (exp << 1); |
| |
| i = exp1 - exp2; |
| |
| |
| if (i >= 0) |
| { |
| ener1 >>= 1; |
| ener2 >>= (i + 1); |
| } |
| else |
| { |
| ener1 >>= (1 - i); |
| ener2 >>= 1; |
| } |
| |
| tmp = ener1 - ener2; |
| ener1 += ener2 + 1; |
| |
| |
| if (tmp >= 0) |
| { |
| tmp = div_16by16(tmp, ener1); |
| } |
| else |
| { |
| tmp = negate_int16(div_16by16(negate_int16(tmp), ener1)); |
| } |
| |
| return (tmp); |
| } |