/* ------------------------------------------------------------------ * 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. ****************************************************************************************/ /* ------------------------------------------------------------------------------ Pathname: ./audio/gsm-amr/c/src/cbsearch.c Functions: D_plsf_3 Date: 01/31/2002 ------------------------------------------------------------------------------ REVISION HISTORY Description: (1) Removed "count.h" and "basic_op.h" and replaced with individual include files (add.h, sub.h, etc.) (2) Added pOverflow parameter to code_10i40_35bits() Description: Replaced "int" and/or "char" with OSCL defined types. Description: ------------------------------------------------------------------------------ INPUT AND OUTPUT DEFINITIONS Inputs: x[] -- array of type Word16 -- target vector, Q0 h[] -- array of type Word16 -- impulse response of weighted synthesis filter h[-L_subfr..-1] must be set to zero. Q12 T0 -- Word16 -- Pitch lag pitch_sharp -- Word16 -- Last quantized pitch gain, Q14 gain_pit -- Word16 gain_pit -- Pitch gain, Q14 res2[] -- array of type Word16 -- Long term prediction residual, Q0 mode -- enum Mode -- coder mode subNr -- Word16 -- subframe number Outputs: code[] -- array of type Word16 -- Innovative codebook, Q13 y[] -- array of type Word16 -- filtered fixed codebook excitation Q12 anap -- Double pointer to Word16 -- Signs of the pulses pOverflow -- pointer to Flag -- Flag set when overflow occurs Returns: Zero Global Variables Used: None Local Variables Needed: None ------------------------------------------------------------------------------ FUNCTION DESCRIPTION Purpose : Inovative codebook search (find index and gain) ------------------------------------------------------------------------------ REQUIREMENTS ------------------------------------------------------------------------------ REFERENCES cbsearch.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 ------------------------------------------------------------------------------ PSEUDO-CODE ------------------------------------------------------------------------------ RESOURCES USED When the code is written for a specific target processor the the resources used should be documented below. STACK USAGE: [stack count for this module] + [variable to represent stack usage for each subroutine called] where: [stack usage variable] = stack usage for [subroutine name] (see [filename].ext) DATA MEMORY USED: x words PROGRAM MEMORY USED: x words CLOCK CYCLES: [cycle count equation for this module] + [variable used to represent cycle count for each subroutine called] where: [cycle count variable] = cycle count for [subroutine name] (see [filename].ext) ------------------------------------------------------------------------------ */ /*---------------------------------------------------------------------------- ; INCLUDES ----------------------------------------------------------------------------*/ #include "cbsearch.h" #include "typedef.h" #include "c2_9pf.h" #include "c2_11pf.h" #include "c3_14pf.h" #include "c4_17pf.h" #include "c8_31pf.h" #include "c1035pf.h" #include "mode.h" #include "basic_op.h" #include "cnst.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 cbsearch(Word16 x[], /* i : target vector, Q0 */ Word16 h[], /* i : impulse response of weighted synthesis*/ /* filter h[-L_subfr..-1] must be set to */ /* zero. Q12 */ Word16 T0, /* i : Pitch lag */ Word16 pitch_sharp,/* i : Last quantized pitch gain, Q14 */ Word16 gain_pit, /* i : Pitch gain, Q14 */ Word16 res2[], /* i : Long term prediction residual, Q0 */ Word16 code[], /* o : Innovative codebook, Q13 */ Word16 y[], /* o : filtered fixed codebook excitation */ /* Q12 */ Word16 **anap, /* o : Signs of the pulses */ enum Mode mode, /* i : coder mode */ Word16 subNr, /* i : subframe number */ Flag *pOverflow) /* o : Flag set when overflow occurs */ { Word16 index; Word16 i; Word16 temp; Word16 pit_sharpTmp; /* For MR74, the pre and post CB pitch sharpening is included in the * codebook search routine, while for MR122 is it not. */ if ((mode == MR475) || (mode == MR515)) { /* MR475, MR515 */ *(*anap)++ = code_2i40_9bits( subNr, x, h, T0, pitch_sharp, code, y, &index, pOverflow); *(*anap)++ = index; /* sign index */ } else if (mode == MR59) { /* MR59 */ *(*anap)++ = code_2i40_11bits( x, h, T0, pitch_sharp, code, y, &index, pOverflow); *(*anap)++ = index; /* sign index */ } else if (mode == MR67) { /* MR67 */ *(*anap)++ = code_3i40_14bits( x, h, T0, pitch_sharp, code, y, &index, pOverflow); *(*anap)++ = index; /* sign index */ } else if ((mode == MR74) || (mode == MR795)) { /* MR74, MR795 */ *(*anap)++ = code_4i40_17bits( x, h, T0, pitch_sharp, code, y, &index, pOverflow); *(*anap)++ = index; /* sign index */ } else if (mode == MR102) { /* MR102 */ /*-------------------------------------------------------------* * - include pitch contribution into impulse resp. h1[] * *-------------------------------------------------------------*/ /* pit_sharpTmp = pit_sharp; */ /* if (pit_sharpTmp > 1.0) pit_sharpTmp = 1.0; */ pit_sharpTmp = shl( pitch_sharp, 1, pOverflow); for (i = T0; i < L_SUBFR; i++) { temp = mult( h[i - T0], pit_sharpTmp, pOverflow); h[i] = add( h[i], temp, pOverflow); } /*--------------------------------------------------------------* * - Innovative codebook search (find index and gain) * *--------------------------------------------------------------*/ code_8i40_31bits( x, res2, h, code, y, *anap, pOverflow); *anap += 7; /*-------------------------------------------------------* * - Add the pitch contribution to code[]. * *-------------------------------------------------------*/ for (i = T0; i < L_SUBFR; i++) { temp = mult( code[i - T0], pit_sharpTmp, pOverflow); code[i] = add( code[i], temp, pOverflow); } } else { /* MR122 */ /*-------------------------------------------------------------* * - include pitch contribution into impulse resp. h1[] * *-------------------------------------------------------------*/ /* pit_sharpTmp = gain_pit; */ /* if (pit_sharpTmp > 1.0) pit_sharpTmp = 1.0; */ pit_sharpTmp = shl(gain_pit, 1, pOverflow); for (i = T0; i < L_SUBFR; i++) { temp = ((Word32)h[i - T0] * pit_sharpTmp) >> 15; /* mult( h[i - T0], , pOverflow); */ h[i] = add( h[i], temp, pOverflow); } /*--------------------------------------------------------------* * - Innovative codebook search (find index and gain) * *--------------------------------------------------------------*/ code_10i40_35bits( x, res2, h, code, y, *anap, pOverflow); *anap += 10; /*-------------------------------------------------------* * - Add the pitch contribution to code[]. * *-------------------------------------------------------*/ for (i = T0; i < L_SUBFR; i++) { temp = mult( code[i - T0], pit_sharpTmp, pOverflow); code[i] = add( code[i], temp, pOverflow); } } }