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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 /*
     19 
     20  Pathname: s_TNS_frame_info.h
     21 
     22 ------------------------------------------------------------------------------
     23  REVISION HISTORY
     24 
     25  Description: Modified to eliminate triple-nested structure, which wasted
     26  2 KB of memory.
     27 
     28  Description:
     29  (1) Modified to include the lines...
     30 
     31     #ifdef __cplusplus
     32     extern "C" {
     33     #endif
     34 
     35     #ifdef __cplusplus
     36     }
     37     #endif
     38 
     39  (2) Updated the copyright header.
     40 
     41  Description:
     42  (1) Changed hard coded size of arrays from "8" to "TNS_MAX_WIN"
     43  (2) Moved elements from s_TNSinfo.h up to the level of TNS_frame_info
     44  (3) Added Bool "tns_data_present" for future use.
     45  (4) Moved lpc_coef up from s_TNSfilt.h (allowed for use of smaller array.)
     46 
     47  Description:
     48  (1) Removed the array "coef_res", which is now a local variable on the
     49  stack inside get_tns.c
     50 
     51  Who:                       Date:
     52  Description:
     53 
     54 ------------------------------------------------------------------------------
     55  INCLUDE DESCRIPTION
     56 
     57  This include file defines the structure, s_TNS_frame_info
     58 
     59 ------------------------------------------------------------------------------
     60 */
     61 
     62 /*----------------------------------------------------------------------------
     63 ; CONTINUE ONLY IF NOT ALREADY DEFINED
     64 ----------------------------------------------------------------------------*/
     65 #ifndef S_TNS_FRAME_INFO_H
     66 #define S_TNS_FRAME_INFO_H
     67 
     68 #ifdef __cplusplus
     69 extern "C"
     70 {
     71 #endif
     72 
     73     /*----------------------------------------------------------------------------
     74     ; INCLUDES
     75     ----------------------------------------------------------------------------*/
     76 #include "pv_audio_type_defs.h"
     77 #include "e_tns_const.h"
     78 #include "s_tnsfilt.h"
     79 
     80     /*----------------------------------------------------------------------------
     81     ; MACROS
     82     ; Define module specific macros here
     83     ----------------------------------------------------------------------------*/
     84 
     85     /*----------------------------------------------------------------------------
     86     ; DEFINES
     87     ; Include all pre-processor statements here.
     88     ----------------------------------------------------------------------------*/
     89 
     90     /*----------------------------------------------------------------------------
     91     ; EXTERNAL VARIABLES REFERENCES
     92     ; Declare variables used in this module but defined elsewhere
     93     ----------------------------------------------------------------------------*/
     94 
     95     /*----------------------------------------------------------------------------
     96     ; SIMPLE TYPEDEF'S
     97     ----------------------------------------------------------------------------*/
     98 
     99     /*----------------------------------------------------------------------------
    100     ; ENUMERATED TYPEDEF'S
    101     ----------------------------------------------------------------------------*/
    102 
    103     /*----------------------------------------------------------------------------
    104     ; STRUCTURES TYPEDEF'S
    105     ----------------------------------------------------------------------------*/
    106     typedef struct
    107     {
    108         Bool tns_data_present;
    109 
    110         /* Information about the number of filters for each window. */
    111         Int n_filt[TNS_MAX_WIN];
    112 
    113         /*
    114          * Filter Information
    115          *
    116          * For short windows, there is a maximum of
    117          * 1 filter per window (8 total)
    118          *
    119          * For long windows, there is a maximum of 3 filters
    120          *
    121          */
    122         TNSfilt filt[TNS_MAX_WIN];
    123 
    124         /*
    125          * For short windows, there is a maximum of 8 filters,
    126          * each of order 7 (requring 56 Ints)
    127          *
    128          * For long windows, there is a maximum of 3 filters,
    129          * each of order 20 (requiring 60 Ints)
    130          *
    131          * So, 3*TNS_MAX_ORDER declares an array of sufficient
    132          * size (60) for both cases.
    133          */
    134         Int32 lpc_coef[3*TNS_MAX_ORDER];
    135 
    136     } TNS_frame_info;
    137 
    138     /*----------------------------------------------------------------------------
    139     ; GLOBAL FUNCTION DEFINITIONS
    140     ; Function Prototype declaration
    141     ----------------------------------------------------------------------------*/
    142 
    143 #ifdef __cplusplus
    144 }
    145 #endif
    146 
    147 #endif /* S_TNS_FRAME_INFO_H */
    148