ref: d8578de53c9a0af9bf3cc9d2a008cc0a66eb9b1d
dir: /libfaad/pulse.c/
/* ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding ** Copyright (C) 2003-2004 M. Bakker, Ahead Software 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. ** ** Commercial non-GPL licensing of this software is possible. ** For more info contact Ahead Software through [email protected]. ** ** $Id: pulse.c,v 1.17 2004/09/04 14:56:28 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 = ics->swb_offset[pul->pulse_start_sfb]; 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; }