/*

** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding

** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

**

** Any non-GPL usage of this software or parts of this software is strictly

** forbidden.

**

** The "appropriate copyright message" mentioned in section 2c of the GPLv2

** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"

**

** Commercial non-GPL licensing of this software is possible.

** For more info contact Nero AG through Mpeg4AAClicense@nero.com.

**

** $Id: pulse.c,v 1.21 2007/11/01 12:33:34 menno Exp $

**/

#include "common.h"

#include "structs.h"

#include "syntax.h"

#include "pulse.h"

uint8_t pulse_decode(ic_stream *ics, int16_t *spec_data, uint16_t framelen)

{

    uint8_t i;

    uint16_t k;

    pulse_info *pul = &(ics->pul);

    k = min(ics->swb_offset[pul->pulse_start_sfb], ics->swb_offset_max);

    for (i = 0; i <= pul->number_pulse; i++)

    {

        k += pul->pulse_offset[i];

        if (k >= framelen)

            return 15; /* should not be possible */

        if (spec_data[k] > 0)

            spec_data[k] += pul->pulse_amp[i];

        else

            spec_data[k] -= pul->pulse_amp[i];

    }

    return 0;

}