| /* ------------------------------------------------------------------ |
| * 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); |
| } |
| } |
| |
| } |
