forked from len0rd/rockbox
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius <nils@rockbox.org> Tested-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Sean Bartell
Nils Wallménius
parent
a0009907de
commit
f40bfc9267
757 changed files with 122 additions and 122 deletions
259
lib/rbcodec/codecs/libfaad/sbr_tf_grid.c
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259
lib/rbcodec/codecs/libfaad/sbr_tf_grid.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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/* Time/Frequency grid */
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#include "common.h"
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#include "structs.h"
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#ifdef SBR_DEC
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#include <stdlib.h>
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#include "sbr_syntax.h"
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#include "sbr_tf_grid.h"
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/* static function declarations */
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#if 0
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static int16_t rel_bord_lead(sbr_info *sbr, uint8_t ch, uint8_t l);
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static int16_t rel_bord_trail(sbr_info *sbr, uint8_t ch, uint8_t l);
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#endif
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static uint8_t middleBorder(sbr_info *sbr, uint8_t ch);
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/* function constructs new time border vector */
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/* first build into temp vector to be able to use previous vector on error */
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uint8_t envelope_time_border_vector(sbr_info *sbr, uint8_t ch)
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{
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uint8_t l, temp;
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int8_t border;
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uint8_t t_E_temp[6] = {0};
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t_E_temp[0] = sbr->rate * sbr->abs_bord_lead[ch];
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t_E_temp[sbr->L_E[ch]] = sbr->rate * sbr->abs_bord_trail[ch];
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switch (sbr->bs_frame_class[ch])
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{
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case FIXFIX:
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switch (sbr->L_E[ch])
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{
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case 4:
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temp = (int) (sbr->numTimeSlots / 4);
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t_E_temp[3] = sbr->rate * 3 * temp;
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t_E_temp[2] = sbr->rate * 2 * temp;
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t_E_temp[1] = sbr->rate * temp;
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break;
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case 2:
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t_E_temp[1] = sbr->rate * (int) (sbr->numTimeSlots / 2);
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break;
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default:
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break;
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}
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break;
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case FIXVAR:
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if (sbr->L_E[ch] > 1)
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{
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int8_t i = sbr->L_E[ch];
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border = sbr->abs_bord_trail[ch];
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for (l = 0; l < (sbr->L_E[ch] - 1); l++)
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{
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if (border < sbr->bs_rel_bord[ch][l])
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return 1;
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border -= sbr->bs_rel_bord[ch][l];
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t_E_temp[--i] = sbr->rate * border;
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}
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}
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break;
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case VARFIX:
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if (sbr->L_E[ch] > 1)
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{
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int8_t i = 1;
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border = sbr->abs_bord_lead[ch];
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for (l = 0; l < (sbr->L_E[ch] - 1); l++)
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{
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border += sbr->bs_rel_bord[ch][l];
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if (sbr->rate * border + sbr->tHFAdj > sbr->numTimeSlotsRate+sbr->tHFGen)
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return 1;
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t_E_temp[i++] = sbr->rate * border;
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}
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}
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break;
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case VARVAR:
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if (sbr->bs_num_rel_0[ch])
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{
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int8_t i = 1;
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border = sbr->abs_bord_lead[ch];
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for (l = 0; l < sbr->bs_num_rel_0[ch]; l++)
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{
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border += sbr->bs_rel_bord_0[ch][l];
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if (sbr->rate * border + sbr->tHFAdj > sbr->numTimeSlotsRate+sbr->tHFGen)
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return 1;
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t_E_temp[i++] = sbr->rate * border;
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}
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}
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if (sbr->bs_num_rel_1[ch])
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{
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int8_t i = sbr->L_E[ch];
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border = sbr->abs_bord_trail[ch];
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for (l = 0; l < sbr->bs_num_rel_1[ch]; l++)
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{
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if (border < sbr->bs_rel_bord_1[ch][l])
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return 1;
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border -= sbr->bs_rel_bord_1[ch][l];
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t_E_temp[--i] = sbr->rate * border;
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}
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}
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break;
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}
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/* no error occured, we can safely use this t_E vector */
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for (l = 0; l < 6; l++)
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{
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sbr->t_E[ch][l] = t_E_temp[l];
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}
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return 0;
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}
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void noise_floor_time_border_vector(sbr_info *sbr, uint8_t ch)
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{
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sbr->t_Q[ch][0] = sbr->t_E[ch][0];
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if (sbr->L_E[ch] == 1)
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{
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sbr->t_Q[ch][1] = sbr->t_E[ch][1];
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sbr->t_Q[ch][2] = 0;
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} else {
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uint8_t index = middleBorder(sbr, ch);
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sbr->t_Q[ch][1] = sbr->t_E[ch][index];
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sbr->t_Q[ch][2] = sbr->t_E[ch][sbr->L_E[ch]];
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}
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}
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#if 0
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static int16_t rel_bord_lead(sbr_info *sbr, uint8_t ch, uint8_t l)
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{
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uint8_t i;
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int16_t acc = 0;
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switch (sbr->bs_frame_class[ch])
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{
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case FIXFIX:
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return sbr->numTimeSlots/sbr->L_E[ch];
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case FIXVAR:
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return 0;
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case VARFIX:
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for (i = 0; i < l; i++)
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{
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acc += sbr->bs_rel_bord[ch][i];
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}
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return acc;
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case VARVAR:
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for (i = 0; i < l; i++)
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{
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acc += sbr->bs_rel_bord_0[ch][i];
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}
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return acc;
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}
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return 0;
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}
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static int16_t rel_bord_trail(sbr_info *sbr, uint8_t ch, uint8_t l)
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{
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uint8_t i;
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int16_t acc = 0;
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switch (sbr->bs_frame_class[ch])
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{
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case FIXFIX:
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case VARFIX:
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return 0;
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case FIXVAR:
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for (i = 0; i < l; i++)
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{
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acc += sbr->bs_rel_bord[ch][i];
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}
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return acc;
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case VARVAR:
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for (i = 0; i < l; i++)
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{
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acc += sbr->bs_rel_bord_1[ch][i];
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}
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return acc;
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}
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return 0;
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}
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#endif
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static uint8_t middleBorder(sbr_info *sbr, uint8_t ch)
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{
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int8_t retval = 0;
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switch (sbr->bs_frame_class[ch])
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{
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case FIXFIX:
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retval = sbr->L_E[ch]/2;
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break;
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case VARFIX:
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if (sbr->bs_pointer[ch] == 0)
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retval = 1;
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else if (sbr->bs_pointer[ch] == 1)
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retval = sbr->L_E[ch] - 1;
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else
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retval = sbr->bs_pointer[ch] - 1;
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break;
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case FIXVAR:
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case VARVAR:
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if (sbr->bs_pointer[ch] > 1)
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retval = sbr->L_E[ch] + 1 - sbr->bs_pointer[ch];
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else
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retval = sbr->L_E[ch] - 1;
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break;
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}
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return (retval > 0) ? retval : 0;
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}
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#endif
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