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view libtwamr/sid_sync.c @ 585:3c6bf0d26ee7 default tip

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TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents a8b73b1c5b19
children
line wrap: on
line source

/*
*****************************************************************************
*
*      GSM AMR-NB speech codec   R98   Version 7.6.0   December 12, 2001
*                                R99   Version 3.3.0                
*                                REL-4 Version 4.1.0                
*
*****************************************************************************
*
*      File             : sid_sync.c
*
*****************************************************************************
*/
/*
*****************************************************************************
*                         MODULE INCLUDE FILE AND VERSION ID
*****************************************************************************
*/
#include "namespace.h"
#include "sid_sync.h"
 
/*
*****************************************************************************
*                         INCLUDE FILES
*****************************************************************************
*/
#include "tw_amr.h"
#include "typedef.h"
#include "basic_op.h"
#include "no_count.h"

/*
*****************************************************************************
*                         LOCAL VARIABLES AND TABLES
*****************************************************************************
*/

/*
*****************************************************************************
*                         PUBLIC PROGRAM CODE
*****************************************************************************
*/

void sid_sync_reset (sid_syncState *st)
{
    st->sid_update_rate = 8;
    st->sid_update_counter = 3;
    st->sid_handover_debt = 0;
    st->prev_ft = TX_SPEECH_GOOD;
}

int sid_sync_set_handover_debt (sid_syncState *st,
                                Word16 debtFrames) 
{
   /* debtFrames >= 0 */ 
   st->sid_handover_debt = debtFrames;
   return 0;
}

void sid_sync (sid_syncState *st, enum Mode mode,
               enum TXFrameType *tx_frame_type)
{
    if (mode == MRDTX)
    {
        st->sid_update_counter--;
        if (st->prev_ft == TX_SPEECH_GOOD) 
        {
           *tx_frame_type = TX_SID_FIRST;
           st->sid_update_counter = 3;
        } 
        else 
        {
           /* TX_SID_UPDATE or TX_NO_DATA */
           if ((st->sid_handover_debt > 0) &&
               (st->sid_update_counter > 2) )
           {
              /* ensure extra updates are  properly delayed after 
                 a possible SID_FIRST */
              *tx_frame_type = TX_SID_UPDATE;
              st->sid_handover_debt--;
           }
           else 
           {
              if (st->sid_update_counter == 0)
              {
                 *tx_frame_type = TX_SID_UPDATE;
                 st->sid_update_counter = st->sid_update_rate;
              } else {
                 *tx_frame_type = TX_NO_DATA;
              }
           }
        }
    }
    else
    {
       st->sid_update_counter = st->sid_update_rate ;
       *tx_frame_type = TX_SPEECH_GOOD;
    }
    st->prev_ft = *tx_frame_type;
}