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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 bd5614fc780a
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             : lflg_upd.c
*      Purpose          : LTP_flag update for AMR VAD option 2
*
*****************************************************************************
*/

#include "tw_amr.h"
#include "namespace.h"
#include "typedef.h"
#include "cnst.h"
#include "basic_op.h"
#include "oper_32b.h"
#include "no_count.h"
#include "vad2.h"

/***************************************************************************
 *
 *   FUNCTION NAME: LTP_flag_update
 *
 *   PURPOSE:
 *     Set LTP_flag if the LTP gain > LTP_THRESHOLD, where the value of
 *     LTP_THRESHOLD depends on the LTP analysis window length.
 *
 *   INPUTS:
 *
 *     mode
 *                     AMR mode
 *     vadState->L_R0
 *                     LTP energy
 *     vadState->L_Rmax
 *                     LTP maximum autocorrelation
 *   OUTPUTS:
 *
 *     vadState->LTP_flag
 *                     Set if LTP gain > LTP_THRESHOLD
 *
 *   RETURN VALUE:
 *
 *     none
 *
 *************************************************************************/

void LTP_flag_update (vadState2 * st, Word16 mode)
{
	Word16 thresh;
	Word16 hi1;
	Word16 lo1;
	Word32 Ltmp;

									test(); test();
	if ((sub(mode, MR475) == 0) || (sub(mode, MR515) == 0))
	{
		thresh = (Word16)(32768.0*0.55);			move16();
	}
	else if (sub(mode, MR102) == 0)
	{
		thresh = (Word16)(32768.0*0.60);			move16();
	}
	else
	{
		thresh = (Word16)(32768.0*0.65);			move16();
	}

	L_Extract (st->L_R0, &hi1, &lo1);
	Ltmp = Mpy_32_16(hi1, lo1, thresh);				test();
	if (L_sub(st->L_Rmax, Ltmp) > 0)
	{
		st->LTP_flag = TRUE;					move16();
	}
	else
	{
		st->LTP_flag = FALSE;					move16();
	}

	return;
}