57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
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/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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**
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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
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**
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** $Id$
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**/
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#include "common.h"
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#include "structs.h"
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#include "syntax.h"
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#include "pulse.h"
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uint8_t pulse_decode(ic_stream *ics, int16_t *spec_data, uint16_t framelen)
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{
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uint8_t i;
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uint16_t k;
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pulse_info *pul = &(ics->pul);
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k = ics->swb_offset[pul->pulse_start_sfb];
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for (i = 0; i <= pul->number_pulse; i++)
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{
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k += pul->pulse_offset[i];
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if (k >= framelen)
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return 15; /* should not be possible */
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if (spec_data[k] > 0)
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spec_data[k] += pul->pulse_amp[i];
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else
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spec_data[k] -= pul->pulse_amp[i];
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}
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return 0;
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}
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