| /* ------------------------------------------------------------------ |
| * 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: qisf_ns.cpp |
| |
| Date: 05/08/2004 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| int16 indice[] : indices of the selected codebook entries |
| int16 isf[] : quantized ISFs (in frequency domain) |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| Coding/Decoding of ISF parameters for background noise. |
| |
| The ISF vector is quantized using VQ with split-by-5 |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #include "pv_amr_wb_type_defs.h" |
| #include "pvamrwbdecoder_basic_op.h" |
| #include "pvamrwbdecoder_acelp.h" |
| #include "qisf_ns.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 |
| ----------------------------------------------------------------------------*/ |
| |
| void Disf_ns( |
| int16 * indice, /* input: quantization indices */ |
| int16 * isf_q /* input: ISF in the frequency domain (0..0.5)*/ |
| ) |
| { |
| int16 i; |
| |
| isf_q[0] = dico1_isf_noise[(indice[0] << 1)]; |
| isf_q[1] = dico1_isf_noise[(indice[0] << 1) + 1]; |
| |
| for (i = 0; i < 3; i++) |
| { |
| isf_q[i + 2] = dico2_isf_noise[(indice[1] << 1) + indice[1] + i]; |
| isf_q[i + 5] = dico3_isf_noise[(indice[2] << 1) + indice[2] + i]; |
| } |
| |
| for (i = 0; i < 4; i++) |
| { |
| isf_q[i + 8] = dico4_isf_noise[(indice[3] << 2) + i]; |
| isf_q[i + 12] = dico5_isf_noise[(indice[4] << 2) + i]; |
| } |
| |
| for (i = 0; i < ORDER; i++) |
| { |
| isf_q[i] = add_int16(isf_q[i], mean_isf_noise[i]); |
| } |
| |
| Reorder_isf(isf_q, ISF_GAP, ORDER); |
| |
| } |