| /* ------------------------------------------------------------------ |
| * 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/lsp.c |
| Functions: |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: Updated template used to PV coding template. |
| Changed to accept the pOverflow flag for EPOC compatibility. |
| |
| Description: Per review comments, added pOverflow flag to a few forgotten |
| functions. Removed unnecessary include files. |
| |
| Description: For lsp_reset() and lsp() |
| 1. Replaced copy() with more efficient memcpy(). |
| 2. Eliminated unused include file copy.h. |
| |
| Description: For lsp_reset() |
| 1. Modified memcpy() operands order. |
| |
| Description: Replaced OSCL mem type functions and eliminated include |
| files that now are chosen by OSCL definitions |
| |
| Description: Replaced "int" and/or "char" with OSCL defined types. |
| |
| Who: Date: |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| MODULE DESCRIPTION |
| |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "lsp.h" |
| #include "typedef.h" |
| #include "q_plsf.h" |
| #include "az_lsp.h" |
| #include "int_lpc.h" |
| #include "lsp_tab.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 VARIABLE DEFINITIONS |
| ; Variable declaration - defined here and used outside this module |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /* |
| ------------------------------------------------------------------------------ |
| FUNCTION NAME: lsp_init (lspState **st) |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| Inputs: |
| st = Pointer to type lspState |
| |
| Outputs: |
| st = Pointer to type lspState -- values are initialized. |
| |
| Returns: |
| None |
| |
| Global Variables Used: |
| lsp_init_data = Word16 array. |
| |
| |
| Local Variables Needed: |
| None |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| Initializes lsp state data. |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| None |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| lsp.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| |
| ------------------------------------------------------------------------------ |
| RESOURCES USED [optional] |
| |
| When the code is written for a specific target processor the |
| the resources used should be documented below. |
| |
| HEAP MEMORY USED: x bytes |
| |
| STACK MEMORY USED: x bytes |
| |
| CLOCK CYCLES: (cycle count equation for this function) + (variable |
| used to represent cycle count for each subroutine |
| called) |
| where: (cycle count variable) = cycle count for [subroutine |
| name] |
| |
| ------------------------------------------------------------------------------ |
| CAUTION [optional] |
| [State any special notes, constraints or cautions for users of this function] |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| Word16 lsp_init(lspState **st) |
| { |
| lspState* s; |
| |
| if (st == (lspState **) NULL) |
| { |
| /* fprintf(stderr, "lsp_init: invalid parameter\n"); */ |
| return -1; |
| } |
| |
| *st = NULL; |
| |
| /* allocate memory */ |
| if ((s = (lspState *) malloc(sizeof(lspState))) == NULL) |
| { |
| /* fprintf(stderr, "lsp_init: can not malloc state structure\n"); */ |
| return -1; |
| } |
| |
| /* Initialize quantization state */ |
| if (0 != Q_plsf_init(&s->qSt)) |
| { |
| return -1; |
| } |
| |
| if (0 != lsp_reset(s)) |
| { |
| return -1; |
| } |
| |
| *st = s; |
| |
| return 0; |
| } |
| |
| |
| |
| |
| |
| /* |
| ------------------------------------------------------------------------------ |
| FUNCTION NAME: lsp_reset |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| Inputs: |
| st = Pointer to type lspState |
| |
| Outputs: |
| st = Pointer to type lspState -- values are reset. |
| |
| Returns: |
| None |
| |
| Global Variables Used: |
| None |
| |
| Local Variables Needed: |
| None |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| resets lsp_state data |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| None |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| lsp.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| |
| ------------------------------------------------------------------------------ |
| RESOURCES USED [optional] |
| |
| When the code is written for a specific target processor the |
| the resources used should be documented below. |
| |
| HEAP MEMORY USED: x bytes |
| |
| STACK MEMORY USED: x bytes |
| |
| CLOCK CYCLES: (cycle count equation for this function) + (variable |
| used to represent cycle count for each subroutine |
| called) |
| where: (cycle count variable) = cycle count for [subroutine |
| name] |
| |
| ------------------------------------------------------------------------------ |
| CAUTION [optional] |
| [State any special notes, constraints or cautions for users of this function] |
| |
| ------------------------------------------------------------------------------ |
| */ |
| Word16 lsp_reset(lspState *st) |
| { |
| |
| if (st == (lspState *) NULL) |
| { |
| /* fprintf(stderr, "lsp_reset: invalid parameter\n"); */ |
| return -1; |
| } |
| |
| /* Init lsp_old[] */ |
| memcpy(st->lsp_old, lsp_init_data, M*sizeof(Word16)); |
| |
| /* Initialize lsp_old_q[] */ |
| memcpy(st->lsp_old_q, st->lsp_old, M*sizeof(Word16)); |
| |
| /* Reset quantization state */ |
| Q_plsf_reset(st->qSt); |
| |
| return 0; |
| } |
| |
| |
| |
| |
| |
| |
| |
| /* |
| ------------------------------------------------------------------------------ |
| FUNCTION NAME: lsp_exit |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| Inputs: |
| st = Pointer to type lspState |
| |
| Outputs: |
| None |
| |
| Returns: |
| None |
| |
| Global Variables Used: |
| None |
| |
| Local Variables Needed: |
| None |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| Frees memory used by lspState. |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| None |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| lsp.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| |
| ------------------------------------------------------------------------------ |
| RESOURCES USED [optional] |
| |
| When the code is written for a specific target processor the |
| the resources used should be documented below. |
| |
| HEAP MEMORY USED: x bytes |
| |
| STACK MEMORY USED: x bytes |
| |
| CLOCK CYCLES: (cycle count equation for this function) + (variable |
| used to represent cycle count for each subroutine |
| called) |
| where: (cycle count variable) = cycle count for [subroutine |
| name] |
| |
| ------------------------------------------------------------------------------ |
| CAUTION [optional] |
| [State any special notes, constraints or cautions for users of this function] |
| |
| ------------------------------------------------------------------------------ |
| */ |
| void lsp_exit(lspState **st) |
| { |
| if (st == NULL || *st == NULL) |
| return; |
| |
| /* Deallocate members */ |
| Q_plsf_exit(&(*st)->qSt); |
| |
| /* deallocate memory */ |
| free(*st); |
| *st = NULL; |
| |
| return; |
| } |
| |
| |
| |
| /* |
| ------------------------------------------------------------------------------ |
| FUNCTION NAME: lsp |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| |
| |
| Inputs: |
| st = Pointer to type lspState -- State struct |
| req_mode = enum Mode -- requested coder mode |
| used_mode = enum Mode -- used coder mode |
| az = array of type Word16 -- interpolated LP parameters Q12 |
| |
| Outputs: |
| azQ = array of type Word16 -- quantization interpol. LP parameters Q12 |
| lsp_new = array of type Word16 -- new lsp vector |
| anap = Double pointer of type Word16 -- analysis parameters |
| pOverflow = Pointer to type Flag -- Flag set when overflow occurs |
| st = Pointer to type lspState -- State struct |
| az = array of type Word16 -- interpolated LP parameters Q12 |
| |
| Returns: |
| None |
| |
| Global Variables Used: |
| None |
| |
| Local Variables Needed: |
| None |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| None |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| lsp.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| |
| ------------------------------------------------------------------------------ |
| RESOURCES USED [optional] |
| |
| When the code is written for a specific target processor the |
| the resources used should be documented below. |
| |
| HEAP MEMORY USED: x bytes |
| |
| STACK MEMORY USED: x bytes |
| |
| CLOCK CYCLES: (cycle count equation for this function) + (variable |
| used to represent cycle count for each subroutine |
| called) |
| where: (cycle count variable) = cycle count for [subroutine |
| name] |
| |
| ------------------------------------------------------------------------------ |
| CAUTION [optional] |
| [State any special notes, constraints or cautions for users of this function] |
| |
| ------------------------------------------------------------------------------ |
| */ |
| void lsp(lspState *st, /* i/o : State struct */ |
| enum Mode req_mode, /* i : requested coder mode */ |
| enum Mode used_mode,/* i : used coder mode */ |
| Word16 az[], /* i/o : interpolated LP parameters Q12 */ |
| Word16 azQ[], /* o : quantization interpol. LP parameters Q12*/ |
| Word16 lsp_new[], /* o : new lsp vector */ |
| Word16 **anap, /* o : analysis parameters */ |
| Flag *pOverflow) /* o : Flag set when overflow occurs */ |
| |
| { |
| Word16 lsp_new_q[M]; /* LSPs at 4th subframe */ |
| Word16 lsp_mid[M], lsp_mid_q[M]; /* LSPs at 2nd subframe */ |
| |
| Word16 pred_init_i; /* init index for MA prediction in DTX mode */ |
| |
| if (req_mode == MR122) |
| { |
| Az_lsp(&az[MP1], lsp_mid, st->lsp_old, pOverflow); |
| Az_lsp(&az[MP1 * 3], lsp_new, lsp_mid, pOverflow); |
| |
| /*--------------------------------------------------------------------* |
| * Find interpolated LPC parameters in all subframes (both quantized * |
| * and unquantized). * |
| * The interpolated parameters are in array A_t[] of size (M+1)*4 * |
| * and the quantized interpolated parameters are in array Aq_t[] * |
| *--------------------------------------------------------------------*/ |
| Int_lpc_1and3_2(st->lsp_old, lsp_mid, lsp_new, az, pOverflow); |
| |
| if (used_mode != MRDTX) |
| { |
| /* LSP quantization (lsp_mid[] and lsp_new[] jointly quantized) */ |
| Q_plsf_5( |
| st->qSt, |
| lsp_mid, |
| lsp_new, |
| lsp_mid_q, |
| lsp_new_q, |
| *anap, |
| pOverflow); |
| |
| Int_lpc_1and3(st->lsp_old_q, lsp_mid_q, lsp_new_q, azQ, pOverflow); |
| |
| /* Advance analysis parameters pointer */ |
| (*anap) += 5; |
| } |
| } |
| else |
| { |
| Az_lsp(&az[MP1 * 3], lsp_new, st->lsp_old, pOverflow); /* From A(z) to lsp */ |
| |
| /*--------------------------------------------------------------------* |
| * Find interpolated LPC parameters in all subframes (both quantized * |
| * and unquantized). * |
| * The interpolated parameters are in array A_t[] of size (M+1)*4 * |
| * and the quantized interpolated parameters are in array Aq_t[] * |
| *--------------------------------------------------------------------*/ |
| |
| Int_lpc_1to3_2(st->lsp_old, lsp_new, az, pOverflow); |
| |
| if (used_mode != MRDTX) |
| { |
| /* LSP quantization */ |
| Q_plsf_3( |
| st->qSt, |
| req_mode, |
| lsp_new, |
| lsp_new_q, |
| *anap, |
| &pred_init_i, |
| pOverflow); |
| |
| Int_lpc_1to3( |
| st->lsp_old_q, |
| lsp_new_q, |
| azQ, |
| pOverflow); |
| |
| /* Advance analysis parameters pointer */ |
| (*anap) += 3; |
| } |
| } |
| |
| /* update the LSPs for the next frame */ |
| memcpy(st->lsp_old, lsp_new, M*sizeof(Word16)); |
| |
| if (used_mode != MRDTX) |
| { |
| memcpy(st->lsp_old_q, lsp_new_q, M*sizeof(Word16)); |
| } |
| } |
| |