cl_ltp.cpp

实现3GPP的GSM中AMR语音的CODECS。

/* ------------------------------------------------------------------
 * Copyright (C) 2008 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/cl_ltp.c
 Funtions: cl_ltp_init
           cl_ltp_reset
           cl_ltp_exit
           cl_ltp

     Date: 06/07/2000

------------------------------------------------------------------------------
 REVISION HISTORY

 Description:   Placed into PV template and optimized.

 Description: Synchronized file with UMTS version 3.2.0. Updated coding
              template. Removed unnecessary include files.

 Description: Removed basic_op.h and oper_32b.h in the include section, and
              added basicop_malloc.h.

 Description: Fixed typecasting issue in TI C compiler.

 Description: Added pOverflow parameter -- fixed minor template problem.

 Description:
              1. Eliminated unused include file typedef.h.
              2. Replaced array addressing by pointers
              3. Eliminated if-else checks for saturation

 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.

 Description:

------------------------------------------------------------------------------
 MODULE DESCRIPTION

 This file contains functions that perform closed-loop fractional pitch
 search.

------------------------------------------------------------------------------
*/


/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "cl_ltp.h"
#include "basicop_malloc.h"
#include "cnst.h"
#include "convolve.h"
#include "g_pitch.h"
#include "pred_lt.h"
#include "pitch_fr.h"
#include "enc_lag3.h"
#include "enc_lag6.h"
#include "q_gain_p.h"
#include "ton_stab.h"
#include "oscl_mem.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: cl_ltp_init
------------------------------------------------------------------------------
 INPUT AND OUTPUT DEFINITIONS

 Inputs:
    state = Pointer to a pointer to a clLtpState structure

 Outputs:
    state points to the newly created clLtpState structure.

 Returns:
    This function returns 0 upon success and -1 upon failure.

 Global Variables Used:
    None

 Local Variables Needed:
    None

------------------------------------------------------------------------------
 FUNCTION DESCRIPTION

 Allocates state memory and initializes state memory

------------------------------------------------------------------------------
 REQUIREMENTS

 None.

------------------------------------------------------------------------------
 REFERENCES

 cl_ltp.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001

------------------------------------------------------------------------------
 PSEUDO-CODE

int cl_ltp_init (clLtpState **state)
{
    clLtpState* s;

    if (state == (clLtpState **) NULL){
        fprintf(stderr, "cl_ltp_init: invalid parameter\n");
        return -1;
    }
    *state = NULL;

    // allocate memory
    if ((s= (clLtpState *) malloc(sizeof(clLtpState))) == NULL){
        fprintf(stderr, "cl_ltp_init: can not malloc state structure\n");
        return -1;
  }

    // init the sub state
    if (Pitch_fr_init(&s->pitchSt)) {
        cl_ltp_exit(&s);
        return -1;
    }

    cl_ltp_reset(s);

    *state = s;

    return 0;
}


------------------------------------------------------------------------------
 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 cl_ltp_init(clLtpState **state)
{
    clLtpState* s;

    if (state == (clLtpState **) NULL)
    {
        /*fprint(stderr, "cl_ltp_init: invalid parameter\n");*/
        return(-1);
    }
    *state = NULL;

    /* allocate memory */
    if ((s = (clLtpState *) oscl_malloc(sizeof(clLtpState))) == NULL)
    {
        /*fprint(stderr, "cl_ltp_init: can not malloc state structure\n");*/
        return(-1);
    }

    /* init the sub state */
    if (Pitch_fr_init(&s->pitchSt))
    {
        cl_ltp_exit(&s);
        return(-1);
    }

    cl_ltp_reset(s);

    *state = s;

    return(0);
}

/****************************************************************************/

/*
------------------------------------------------------------------------------
 FUNCTION NAME: cl_ltp_reset
------------------------------------------------------------------------------
 INPUT AND OUTPUT DEFINITIONS

 Inputs:
    state = pointer to the clLtpState structure to be reset

 Outputs:
    The state structure pointed to by clLtpState *state is reset.

 Returns:
    The function returns int 0 if successful, -1 otherwise.

 Global Variables Used:
    None

 Local Variables Needed:
    None

------------------------------------------------------------------------------
 FUNCTION DESCRIPTION

 Initializes state memory to zero.

------------------------------------------------------------------------------
 REQUIREMENTS

------------------------------------------------------------------------------
 REFERENCES

 cl_ltp.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001

 ------------------------------------------------------------------------------
 PSEUDO-CODE

int cl_ltp_reset (clLtpState *state)
{
    if (state == (clLtpState *) NULL){
        fprintf(stderr, "cl_ltp_reset: invalid parameter\n");
        return -1;
    }

    // Reset pitch search states
    Pitch_fr_reset (state->pitchSt);

    return 0;
}

------------------------------------------------------------------------------
 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 cl_ltp_reset(clLtpState *state)
{
    if (state == (clLtpState *) NULL)
    {
        /*fprint(stderr, "cl_ltp_reset: invalid parameter\n");  */
        return(-1);
    }

    /* Reset pitch search states */
    Pitch_fr_reset(state->pitchSt);

    return(0);
}

/****************************************************************************/

/*
------------------------------------------------------------------------------
 FUNCTION NAME: cl_ltp_exit
------------------------------------------------------------------------------
 INPUT AND OUTPUT DEFINITIONS

 Inputs:
    clLtpState **state = Reference to the state object to be freed.

 Outputs:
    The memory used by the structure which is pointed to by 'state'
      is freed.

 Returns:
    None

 Global Variables Used:
    None

 Local Variables Needed:
    None

------------------------------------------------------------------------------
 FUNCTION DESCRIPTION

 The memory used for state memory is freed


------------------------------------------------------------------------------
 REQUIREMENTS

 None

------------------------------------------------------------------------------
 REFERENCES

 cl_ltp.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001

------------------------------------------------------------------------------
 PSEUDO-CODE

void cl_ltp_exit (clLtpState **state)
{
    if (state == NULL || *state == NULL)
        return;

    // dealloc members
    Pitch_fr_exit(&(*state)->pitchSt);