mirror of
https://github.com/mpv-player/mpv
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5f5e40c155
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14728 b3059339-0415-0410-9bf9-f77b7e298cf2
841 lines
26 KiB
C
841 lines
26 KiB
C
/*
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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: sbr_syntax.c,v 1.31 2004/05/17 10:18:03 menno Exp $
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**/
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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 "sbr_syntax.h"
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#include "syntax.h"
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#include "sbr_huff.h"
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#include "sbr_fbt.h"
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#include "sbr_tf_grid.h"
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#include "sbr_e_nf.h"
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#include "bits.h"
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#ifdef PS_DEC
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#include "ps_dec.h"
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#endif
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#ifdef DRM_PS
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#include "drm_dec.h"
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#endif
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#include "analysis.h"
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/* static function declarations */
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static void sbr_header(bitfile *ld, sbr_info *sbr);
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static uint8_t calc_sbr_tables(sbr_info *sbr, uint8_t start_freq, uint8_t stop_freq,
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uint8_t samplerate_mode, uint8_t freq_scale,
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uint8_t alter_scale, uint8_t xover_band);
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static uint8_t sbr_data(bitfile *ld, sbr_info *sbr);
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static uint16_t sbr_extension(bitfile *ld, sbr_info *sbr,
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uint8_t bs_extension_id, uint16_t num_bits_left);
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static uint8_t sbr_single_channel_element(bitfile *ld, sbr_info *sbr);
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static uint8_t sbr_channel_pair_element(bitfile *ld, sbr_info *sbr);
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static uint8_t sbr_grid(bitfile *ld, sbr_info *sbr, uint8_t ch);
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static void sbr_dtdf(bitfile *ld, sbr_info *sbr, uint8_t ch);
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static void invf_mode(bitfile *ld, sbr_info *sbr, uint8_t ch);
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static void sinusoidal_coding(bitfile *ld, sbr_info *sbr, uint8_t ch);
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static void sbr_reset(sbr_info *sbr)
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{
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#if 0
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printf("%d\n", sbr->bs_start_freq_prev);
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printf("%d\n", sbr->bs_stop_freq_prev);
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printf("%d\n", sbr->bs_freq_scale_prev);
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printf("%d\n", sbr->bs_alter_scale_prev);
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printf("%d\n", sbr->bs_xover_band_prev);
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printf("%d\n\n", sbr->bs_noise_bands_prev);
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#endif
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/* if these are different from the previous frame: Reset = 1 */
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if ((sbr->bs_start_freq != sbr->bs_start_freq_prev) ||
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(sbr->bs_stop_freq != sbr->bs_stop_freq_prev) ||
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(sbr->bs_freq_scale != sbr->bs_freq_scale_prev) ||
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(sbr->bs_alter_scale != sbr->bs_alter_scale_prev))
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{
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sbr->Reset = 1;
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} else {
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sbr->Reset = 0;
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}
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if ((sbr->bs_start_freq != sbr->bs_start_freq_prev) ||
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(sbr->bs_stop_freq != sbr->bs_stop_freq_prev) ||
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(sbr->bs_freq_scale != sbr->bs_freq_scale_prev) ||
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(sbr->bs_alter_scale != sbr->bs_alter_scale_prev) ||
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(sbr->bs_xover_band != sbr->bs_xover_band_prev) ||
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(sbr->bs_noise_bands != sbr->bs_noise_bands_prev))
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{
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sbr->Reset = 1;
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} else {
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sbr->Reset = 0;
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}
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sbr->bs_start_freq_prev = sbr->bs_start_freq;
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sbr->bs_stop_freq_prev = sbr->bs_stop_freq;
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sbr->bs_freq_scale_prev = sbr->bs_freq_scale;
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sbr->bs_alter_scale_prev = sbr->bs_alter_scale;
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sbr->bs_xover_band_prev = sbr->bs_xover_band;
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sbr->bs_noise_bands_prev = sbr->bs_noise_bands;
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}
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static uint8_t calc_sbr_tables(sbr_info *sbr, uint8_t start_freq, uint8_t stop_freq,
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uint8_t samplerate_mode, uint8_t freq_scale,
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uint8_t alter_scale, uint8_t xover_band)
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{
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uint8_t result = 0;
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uint8_t k2;
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/* calculate the Master Frequency Table */
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sbr->k0 = qmf_start_channel(start_freq, samplerate_mode, sbr->sample_rate);
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k2 = qmf_stop_channel(stop_freq, sbr->sample_rate, sbr->k0);
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/* check k0 and k2 */
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if (sbr->sample_rate >= 48000)
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{
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if ((k2 - sbr->k0) > 32)
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result += 1;
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} else if (sbr->sample_rate <= 32000) {
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if ((k2 - sbr->k0) > 48)
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result += 1;
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} else { /* (sbr->sample_rate == 44100) */
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if ((k2 - sbr->k0) > 45)
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result += 1;
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}
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if (freq_scale == 0)
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{
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result += master_frequency_table_fs0(sbr, sbr->k0, k2, alter_scale);
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} else {
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result += master_frequency_table(sbr, sbr->k0, k2, freq_scale, alter_scale);
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}
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result += derived_frequency_table(sbr, xover_band, k2);
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result = (result > 0) ? 1 : 0;
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return result;
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}
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/* table 2 */
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uint8_t sbr_extension_data(bitfile *ld, sbr_info *sbr, uint16_t cnt)
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{
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uint8_t result = 0;
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uint16_t num_align_bits = 0;
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uint16_t num_sbr_bits = (uint16_t)faad_get_processed_bits(ld);
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uint8_t saved_start_freq, saved_samplerate_mode;
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uint8_t saved_stop_freq, saved_freq_scale;
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uint8_t saved_alter_scale, saved_xover_band;
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#ifdef DRM
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if (!sbr->Is_DRM_SBR)
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#endif
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{
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uint8_t bs_extension_type = (uint8_t)faad_getbits(ld, 4
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DEBUGVAR(1,198,"sbr_bitstream(): bs_extension_type"));
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if (bs_extension_type == EXT_SBR_DATA_CRC)
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{
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sbr->bs_sbr_crc_bits = (uint16_t)faad_getbits(ld, 10
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DEBUGVAR(1,199,"sbr_bitstream(): bs_sbr_crc_bits"));
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}
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}
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/* save old header values, in case the new ones are corrupted */
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saved_start_freq = sbr->bs_start_freq;
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saved_samplerate_mode = sbr->bs_samplerate_mode;
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saved_stop_freq = sbr->bs_stop_freq;
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saved_freq_scale = sbr->bs_freq_scale;
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saved_alter_scale = sbr->bs_alter_scale;
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saved_xover_band = sbr->bs_xover_band;
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sbr->bs_header_flag = faad_get1bit(ld
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DEBUGVAR(1,200,"sbr_bitstream(): bs_header_flag"));
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if (sbr->bs_header_flag)
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sbr_header(ld, sbr);
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/* Reset? */
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sbr_reset(sbr);
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/* first frame should have a header */
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//if (!(sbr->frame == 0 && sbr->bs_header_flag == 0))
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if (sbr->header_count != 0)
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{
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if (sbr->Reset || (sbr->bs_header_flag && sbr->just_seeked))
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{
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uint8_t rt = calc_sbr_tables(sbr, sbr->bs_start_freq, sbr->bs_stop_freq,
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sbr->bs_samplerate_mode, sbr->bs_freq_scale,
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sbr->bs_alter_scale, sbr->bs_xover_band);
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/* if an error occured with the new header values revert to the old ones */
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if (rt > 0)
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{
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calc_sbr_tables(sbr, saved_start_freq, saved_stop_freq,
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saved_samplerate_mode, saved_freq_scale,
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saved_alter_scale, saved_xover_band);
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}
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}
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if (result == 0)
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{
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result = sbr_data(ld, sbr);
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/* sbr_data() returning an error means that there was an error in
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envelope_time_border_vector().
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In this case the old time border vector is saved and all the previous
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data normally read after sbr_grid() is saved.
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*/
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/* to be on the safe side, calculate old sbr tables in case of error */
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if ((result > 0) &&
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(sbr->Reset || (sbr->bs_header_flag && sbr->just_seeked)))
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{
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calc_sbr_tables(sbr, saved_start_freq, saved_stop_freq,
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saved_samplerate_mode, saved_freq_scale,
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saved_alter_scale, saved_xover_band);
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}
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/* we should be able to safely set result to 0 now */
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result = 0;
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}
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} else {
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result = 1;
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}
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#ifdef DRM
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if (!sbr->Is_DRM_SBR)
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#endif
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{
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num_sbr_bits = (uint16_t)faad_get_processed_bits(ld) - num_sbr_bits;
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/* check if we read more bits then were available for sbr */
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if (8*cnt < num_sbr_bits)
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return 1;
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/* -4 does not apply, bs_extension_type is re-read in this function */
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num_align_bits = 8*cnt /*- 4*/ - num_sbr_bits;
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while (num_align_bits > 7)
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{
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faad_getbits(ld, 8
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DEBUGVAR(1,999,"sbr_bitstream(): num_align_bits"));
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num_align_bits -= 8;
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}
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faad_getbits(ld, num_align_bits
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DEBUGVAR(1,999,"sbr_bitstream(): num_align_bits"));
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}
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return result;
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}
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/* table 3 */
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static void sbr_header(bitfile *ld, sbr_info *sbr)
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{
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uint8_t bs_header_extra_1, bs_header_extra_2;
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sbr->header_count++;
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sbr->bs_amp_res = faad_get1bit(ld
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DEBUGVAR(1,203,"sbr_header(): bs_amp_res"));
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/* bs_start_freq and bs_stop_freq must define a fequency band that does
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not exceed 48 channels */
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sbr->bs_start_freq = (uint8_t)faad_getbits(ld, 4
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DEBUGVAR(1,204,"sbr_header(): bs_start_freq"));
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sbr->bs_stop_freq = (uint8_t)faad_getbits(ld, 4
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DEBUGVAR(1,205,"sbr_header(): bs_stop_freq"));
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sbr->bs_xover_band = (uint8_t)faad_getbits(ld, 3
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DEBUGVAR(1,206,"sbr_header(): bs_xover_band"));
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faad_getbits(ld, 2
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DEBUGVAR(1,207,"sbr_header(): bs_reserved_bits_hdr"));
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bs_header_extra_1 = (uint8_t)faad_get1bit(ld
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DEBUGVAR(1,208,"sbr_header(): bs_header_extra_1"));
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bs_header_extra_2 = (uint8_t)faad_get1bit(ld
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DEBUGVAR(1,209,"sbr_header(): bs_header_extra_2"));
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if (bs_header_extra_1)
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{
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sbr->bs_freq_scale = (uint8_t)faad_getbits(ld, 2
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DEBUGVAR(1,211,"sbr_header(): bs_freq_scale"));
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sbr->bs_alter_scale = (uint8_t)faad_get1bit(ld
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DEBUGVAR(1,212,"sbr_header(): bs_alter_scale"));
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sbr->bs_noise_bands = (uint8_t)faad_getbits(ld, 2
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DEBUGVAR(1,213,"sbr_header(): bs_noise_bands"));
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} else {
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/* Default values */
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sbr->bs_freq_scale = 2;
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sbr->bs_alter_scale = 1;
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sbr->bs_noise_bands = 2;
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}
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if (bs_header_extra_2)
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{
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sbr->bs_limiter_bands = (uint8_t)faad_getbits(ld, 2
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DEBUGVAR(1,214,"sbr_header(): bs_limiter_bands"));
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sbr->bs_limiter_gains = (uint8_t)faad_getbits(ld, 2
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DEBUGVAR(1,215,"sbr_header(): bs_limiter_gains"));
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sbr->bs_interpol_freq = (uint8_t)faad_get1bit(ld
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DEBUGVAR(1,216,"sbr_header(): bs_interpol_freq"));
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sbr->bs_smoothing_mode = (uint8_t)faad_get1bit(ld
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DEBUGVAR(1,217,"sbr_header(): bs_smoothing_mode"));
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} else {
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/* Default values */
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sbr->bs_limiter_bands = 2;
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sbr->bs_limiter_gains = 2;
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sbr->bs_interpol_freq = 1;
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sbr->bs_smoothing_mode = 1;
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}
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#if 0
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/* print the header to screen */
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printf("bs_amp_res: %d\n", sbr->bs_amp_res);
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printf("bs_start_freq: %d\n", sbr->bs_start_freq);
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printf("bs_stop_freq: %d\n", sbr->bs_stop_freq);
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printf("bs_xover_band: %d\n", sbr->bs_xover_band);
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if (bs_header_extra_1)
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{
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printf("bs_freq_scale: %d\n", sbr->bs_freq_scale);
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printf("bs_alter_scale: %d\n", sbr->bs_alter_scale);
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printf("bs_noise_bands: %d\n", sbr->bs_noise_bands);
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}
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if (bs_header_extra_2)
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{
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printf("bs_limiter_bands: %d\n", sbr->bs_limiter_bands);
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printf("bs_limiter_gains: %d\n", sbr->bs_limiter_gains);
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printf("bs_interpol_freq: %d\n", sbr->bs_interpol_freq);
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printf("bs_smoothing_mode: %d\n", sbr->bs_smoothing_mode);
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}
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printf("\n");
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#endif
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}
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/* table 4 */
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static uint8_t sbr_data(bitfile *ld, sbr_info *sbr)
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{
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uint8_t result;
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#if 0
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sbr->bs_samplerate_mode = faad_get1bit(ld
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DEBUGVAR(1,219,"sbr_data(): bs_samplerate_mode"));
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#endif
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sbr->rate = (sbr->bs_samplerate_mode) ? 2 : 1;
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switch (sbr->id_aac)
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{
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case ID_SCE:
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if ((result = sbr_single_channel_element(ld, sbr)) > 0)
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return result;
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break;
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case ID_CPE:
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if ((result = sbr_channel_pair_element(ld, sbr)) > 0)
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return result;
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break;
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}
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return 0;
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}
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/* table 5 */
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static uint8_t sbr_single_channel_element(bitfile *ld, sbr_info *sbr)
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{
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uint8_t result;
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if (faad_get1bit(ld
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DEBUGVAR(1,220,"sbr_single_channel_element(): bs_data_extra")))
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{
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faad_getbits(ld, 4
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DEBUGVAR(1,221,"sbr_single_channel_element(): bs_reserved_bits_data"));
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}
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#ifdef DRM
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/* bs_coupling, from sbr_channel_pair_base_element(bs_amp_res) */
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if (sbr->Is_DRM_SBR)
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faad_get1bit(ld);
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#endif
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if ((result = sbr_grid(ld, sbr, 0)) > 0)
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return result;
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sbr_dtdf(ld, sbr, 0);
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invf_mode(ld, sbr, 0);
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sbr_envelope(ld, sbr, 0);
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sbr_noise(ld, sbr, 0);
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#ifndef FIXED_POINT
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envelope_noise_dequantisation(sbr, 0);
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#endif
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memset(sbr->bs_add_harmonic[0], 0, 64*sizeof(uint8_t));
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sbr->bs_add_harmonic_flag[0] = faad_get1bit(ld
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DEBUGVAR(1,223,"sbr_single_channel_element(): bs_add_harmonic_flag[0]"));
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if (sbr->bs_add_harmonic_flag[0])
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sinusoidal_coding(ld, sbr, 0);
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sbr->bs_extended_data = faad_get1bit(ld
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DEBUGVAR(1,224,"sbr_single_channel_element(): bs_extended_data[0]"));
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if (sbr->bs_extended_data)
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{
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uint16_t nr_bits_left;
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uint16_t cnt = (uint16_t)faad_getbits(ld, 4
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DEBUGVAR(1,225,"sbr_single_channel_element(): bs_extension_size"));
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if (cnt == 15)
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{
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cnt += (uint16_t)faad_getbits(ld, 8
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DEBUGVAR(1,226,"sbr_single_channel_element(): bs_esc_count"));
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}
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nr_bits_left = 8 * cnt;
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while (nr_bits_left > 7)
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{
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uint16_t tmp_nr_bits = 0;
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sbr->bs_extension_id = (uint8_t)faad_getbits(ld, 2
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DEBUGVAR(1,227,"sbr_single_channel_element(): bs_extension_id"));
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tmp_nr_bits += 2;
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tmp_nr_bits += sbr_extension(ld, sbr, sbr->bs_extension_id, nr_bits_left);
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/* check if the data read is bigger than the number of available bits */
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if (tmp_nr_bits > nr_bits_left)
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return 1;
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nr_bits_left -= tmp_nr_bits;
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}
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/* Corrigendum */
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if (nr_bits_left > 0)
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{
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faad_getbits(ld, nr_bits_left
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DEBUGVAR(1,280,"sbr_single_channel_element(): nr_bits_left"));
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}
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}
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return 0;
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}
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/* table 6 */
|
|
static uint8_t sbr_channel_pair_element(bitfile *ld, sbr_info *sbr)
|
|
{
|
|
uint8_t n, result;
|
|
|
|
if (faad_get1bit(ld
|
|
DEBUGVAR(1,228,"sbr_single_channel_element(): bs_data_extra")))
|
|
{
|
|
faad_getbits(ld, 4
|
|
DEBUGVAR(1,228,"sbr_channel_pair_element(): bs_reserved_bits_data"));
|
|
faad_getbits(ld, 4
|
|
DEBUGVAR(1,228,"sbr_channel_pair_element(): bs_reserved_bits_data"));
|
|
}
|
|
|
|
sbr->bs_coupling = faad_get1bit(ld
|
|
DEBUGVAR(1,228,"sbr_channel_pair_element(): bs_coupling"));
|
|
|
|
if (sbr->bs_coupling)
|
|
{
|
|
if ((result = sbr_grid(ld, sbr, 0)) > 0)
|
|
return result;
|
|
|
|
/* need to copy some data from left to right */
|
|
sbr->bs_frame_class[1] = sbr->bs_frame_class[0];
|
|
sbr->L_E[1] = sbr->L_E[0];
|
|
sbr->L_Q[1] = sbr->L_Q[0];
|
|
sbr->bs_pointer[1] = sbr->bs_pointer[0];
|
|
|
|
for (n = 0; n <= sbr->L_E[0]; n++)
|
|
{
|
|
sbr->t_E[1][n] = sbr->t_E[0][n];
|
|
sbr->f[1][n] = sbr->f[0][n];
|
|
}
|
|
for (n = 0; n <= sbr->L_Q[0]; n++)
|
|
sbr->t_Q[1][n] = sbr->t_Q[0][n];
|
|
|
|
sbr_dtdf(ld, sbr, 0);
|
|
sbr_dtdf(ld, sbr, 1);
|
|
invf_mode(ld, sbr, 0);
|
|
|
|
/* more copying */
|
|
for (n = 0; n < sbr->N_Q; n++)
|
|
sbr->bs_invf_mode[1][n] = sbr->bs_invf_mode[0][n];
|
|
|
|
sbr_envelope(ld, sbr, 0);
|
|
sbr_noise(ld, sbr, 0);
|
|
sbr_envelope(ld, sbr, 1);
|
|
sbr_noise(ld, sbr, 1);
|
|
|
|
memset(sbr->bs_add_harmonic[0], 0, 64*sizeof(uint8_t));
|
|
memset(sbr->bs_add_harmonic[1], 0, 64*sizeof(uint8_t));
|
|
|
|
sbr->bs_add_harmonic_flag[0] = faad_get1bit(ld
|
|
DEBUGVAR(1,231,"sbr_channel_pair_element(): bs_add_harmonic_flag[0]"));
|
|
if (sbr->bs_add_harmonic_flag[0])
|
|
sinusoidal_coding(ld, sbr, 0);
|
|
|
|
sbr->bs_add_harmonic_flag[1] = faad_get1bit(ld
|
|
DEBUGVAR(1,232,"sbr_channel_pair_element(): bs_add_harmonic_flag[1]"));
|
|
if (sbr->bs_add_harmonic_flag[1])
|
|
sinusoidal_coding(ld, sbr, 1);
|
|
} else {
|
|
uint8_t saved_t_E[6] = {0}, saved_t_Q[3] = {0};
|
|
uint8_t saved_L_E = sbr->L_E[0];
|
|
uint8_t saved_L_Q = sbr->L_Q[0];
|
|
uint8_t saved_frame_class = sbr->bs_frame_class[0];
|
|
|
|
for (n = 0; n < saved_L_E; n++)
|
|
saved_t_E[n] = sbr->t_E[0][n];
|
|
for (n = 0; n < saved_L_Q; n++)
|
|
saved_t_Q[n] = sbr->t_Q[0][n];
|
|
|
|
if ((result = sbr_grid(ld, sbr, 0)) > 0)
|
|
return result;
|
|
if ((result = sbr_grid(ld, sbr, 1)) > 0)
|
|
{
|
|
/* restore first channel data as well */
|
|
sbr->bs_frame_class[0] = saved_frame_class;
|
|
sbr->L_E[0] = saved_L_E;
|
|
sbr->L_Q[0] = saved_L_Q;
|
|
for (n = 0; n < 6; n++)
|
|
sbr->t_E[0][n] = saved_t_E[n];
|
|
for (n = 0; n < 3; n++)
|
|
sbr->t_Q[0][n] = saved_t_Q[n];
|
|
|
|
return result;
|
|
}
|
|
sbr_dtdf(ld, sbr, 0);
|
|
sbr_dtdf(ld, sbr, 1);
|
|
invf_mode(ld, sbr, 0);
|
|
invf_mode(ld, sbr, 1);
|
|
sbr_envelope(ld, sbr, 0);
|
|
sbr_envelope(ld, sbr, 1);
|
|
sbr_noise(ld, sbr, 0);
|
|
sbr_noise(ld, sbr, 1);
|
|
|
|
memset(sbr->bs_add_harmonic[0], 0, 64*sizeof(uint8_t));
|
|
memset(sbr->bs_add_harmonic[1], 0, 64*sizeof(uint8_t));
|
|
|
|
sbr->bs_add_harmonic_flag[0] = faad_get1bit(ld
|
|
DEBUGVAR(1,239,"sbr_channel_pair_element(): bs_add_harmonic_flag[0]"));
|
|
if (sbr->bs_add_harmonic_flag[0])
|
|
sinusoidal_coding(ld, sbr, 0);
|
|
|
|
sbr->bs_add_harmonic_flag[1] = faad_get1bit(ld
|
|
DEBUGVAR(1,240,"sbr_channel_pair_element(): bs_add_harmonic_flag[1]"));
|
|
if (sbr->bs_add_harmonic_flag[1])
|
|
sinusoidal_coding(ld, sbr, 1);
|
|
}
|
|
#ifndef FIXED_POINT
|
|
envelope_noise_dequantisation(sbr, 0);
|
|
envelope_noise_dequantisation(sbr, 1);
|
|
|
|
if (sbr->bs_coupling)
|
|
unmap_envelope_noise(sbr);
|
|
#endif
|
|
|
|
sbr->bs_extended_data = faad_get1bit(ld
|
|
DEBUGVAR(1,233,"sbr_channel_pair_element(): bs_extended_data[0]"));
|
|
if (sbr->bs_extended_data)
|
|
{
|
|
uint16_t nr_bits_left;
|
|
uint16_t cnt = (uint16_t)faad_getbits(ld, 4
|
|
DEBUGVAR(1,234,"sbr_channel_pair_element(): bs_extension_size"));
|
|
if (cnt == 15)
|
|
{
|
|
cnt += (uint16_t)faad_getbits(ld, 8
|
|
DEBUGVAR(1,235,"sbr_channel_pair_element(): bs_esc_count"));
|
|
}
|
|
|
|
nr_bits_left = 8 * cnt;
|
|
while (nr_bits_left > 7)
|
|
{
|
|
uint16_t tmp_nr_bits = 0;
|
|
|
|
sbr->bs_extension_id = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,236,"sbr_channel_pair_element(): bs_extension_id"));
|
|
tmp_nr_bits += 2;
|
|
tmp_nr_bits += sbr_extension(ld, sbr, sbr->bs_extension_id, nr_bits_left);
|
|
|
|
/* check if the data read is bigger than the number of available bits */
|
|
if (tmp_nr_bits > nr_bits_left)
|
|
return 1;
|
|
|
|
nr_bits_left -= tmp_nr_bits;
|
|
}
|
|
|
|
/* Corrigendum */
|
|
if (nr_bits_left > 0)
|
|
{
|
|
faad_getbits(ld, nr_bits_left
|
|
DEBUGVAR(1,280,"sbr_channel_pair_element(): nr_bits_left"));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* integer log[2](x): input range [0,10) */
|
|
static int8_t sbr_log2(const int8_t val)
|
|
{
|
|
int8_t log2tab[] = { 0, 0, 1, 2, 2, 3, 3, 3, 3, 4 };
|
|
if (val < 10 && val >= 0)
|
|
return log2tab[val];
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* table 7 */
|
|
static uint8_t sbr_grid(bitfile *ld, sbr_info *sbr, uint8_t ch)
|
|
{
|
|
uint8_t i, env, rel, result;
|
|
uint8_t bs_abs_bord, bs_abs_bord_1;
|
|
uint8_t bs_num_env = 0;
|
|
uint8_t saved_L_E = sbr->L_E[ch];
|
|
uint8_t saved_L_Q = sbr->L_Q[ch];
|
|
uint8_t saved_frame_class = sbr->bs_frame_class[ch];
|
|
|
|
sbr->bs_frame_class[ch] = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,248,"sbr_grid(): bs_frame_class"));
|
|
|
|
switch (sbr->bs_frame_class[ch])
|
|
{
|
|
case FIXFIX:
|
|
i = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,249,"sbr_grid(): bs_num_env_raw"));
|
|
|
|
bs_num_env = min(1 << i, 5);
|
|
|
|
i = (uint8_t)faad_get1bit(ld
|
|
DEBUGVAR(1,250,"sbr_grid(): bs_freq_res_flag"));
|
|
for (env = 0; env < bs_num_env; env++)
|
|
sbr->f[ch][env] = i;
|
|
|
|
sbr->abs_bord_lead[ch] = 0;
|
|
sbr->abs_bord_trail[ch] = sbr->numTimeSlots;
|
|
sbr->n_rel_lead[ch] = bs_num_env - 1;
|
|
sbr->n_rel_trail[ch] = 0;
|
|
break;
|
|
|
|
case FIXVAR:
|
|
bs_abs_bord = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,251,"sbr_grid(): bs_abs_bord")) + sbr->numTimeSlots;
|
|
bs_num_env = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,252,"sbr_grid(): bs_num_env")) + 1;
|
|
|
|
for (rel = 0; rel < bs_num_env-1; rel++)
|
|
{
|
|
sbr->bs_rel_bord[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,253,"sbr_grid(): bs_rel_bord")) + 2;
|
|
}
|
|
i = sbr_log2(bs_num_env + 1);
|
|
sbr->bs_pointer[ch] = (uint8_t)faad_getbits(ld, i
|
|
DEBUGVAR(1,254,"sbr_grid(): bs_pointer"));
|
|
|
|
for (env = 0; env < bs_num_env; env++)
|
|
{
|
|
sbr->f[ch][bs_num_env - env - 1] = (uint8_t)faad_get1bit(ld
|
|
DEBUGVAR(1,255,"sbr_grid(): bs_freq_res"));
|
|
}
|
|
|
|
sbr->abs_bord_lead[ch] = 0;
|
|
sbr->abs_bord_trail[ch] = bs_abs_bord;
|
|
sbr->n_rel_lead[ch] = 0;
|
|
sbr->n_rel_trail[ch] = bs_num_env - 1;
|
|
break;
|
|
|
|
case VARFIX:
|
|
bs_abs_bord = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,256,"sbr_grid(): bs_abs_bord"));
|
|
bs_num_env = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,257,"sbr_grid(): bs_num_env")) + 1;
|
|
|
|
for (rel = 0; rel < bs_num_env-1; rel++)
|
|
{
|
|
sbr->bs_rel_bord[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,258,"sbr_grid(): bs_rel_bord")) + 2;
|
|
}
|
|
i = sbr_log2(bs_num_env + 1);
|
|
sbr->bs_pointer[ch] = (uint8_t)faad_getbits(ld, i
|
|
DEBUGVAR(1,259,"sbr_grid(): bs_pointer"));
|
|
|
|
for (env = 0; env < bs_num_env; env++)
|
|
{
|
|
sbr->f[ch][env] = (uint8_t)faad_get1bit(ld
|
|
DEBUGVAR(1,260,"sbr_grid(): bs_freq_res"));
|
|
}
|
|
|
|
sbr->abs_bord_lead[ch] = bs_abs_bord;
|
|
sbr->abs_bord_trail[ch] = sbr->numTimeSlots;
|
|
sbr->n_rel_lead[ch] = bs_num_env - 1;
|
|
sbr->n_rel_trail[ch] = 0;
|
|
break;
|
|
|
|
case VARVAR:
|
|
bs_abs_bord = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,261,"sbr_grid(): bs_abs_bord_0"));
|
|
bs_abs_bord_1 = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,262,"sbr_grid(): bs_abs_bord_1")) + sbr->numTimeSlots;
|
|
sbr->bs_num_rel_0[ch] = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,263,"sbr_grid(): bs_num_rel_0"));
|
|
sbr->bs_num_rel_1[ch] = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,264,"sbr_grid(): bs_num_rel_1"));
|
|
|
|
bs_num_env = min(5, sbr->bs_num_rel_0[ch] + sbr->bs_num_rel_1[ch] + 1);
|
|
|
|
for (rel = 0; rel < sbr->bs_num_rel_0[ch]; rel++)
|
|
{
|
|
sbr->bs_rel_bord_0[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,265,"sbr_grid(): bs_rel_bord")) + 2;
|
|
}
|
|
for(rel = 0; rel < sbr->bs_num_rel_1[ch]; rel++)
|
|
{
|
|
sbr->bs_rel_bord_1[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,266,"sbr_grid(): bs_rel_bord")) + 2;
|
|
}
|
|
i = sbr_log2(sbr->bs_num_rel_0[ch] + sbr->bs_num_rel_1[ch] + 2);
|
|
sbr->bs_pointer[ch] = (uint8_t)faad_getbits(ld, i
|
|
DEBUGVAR(1,267,"sbr_grid(): bs_pointer"));
|
|
|
|
for (env = 0; env < bs_num_env; env++)
|
|
{
|
|
sbr->f[ch][env] = (uint8_t)faad_get1bit(ld
|
|
DEBUGVAR(1,268,"sbr_grid(): bs_freq_res"));
|
|
}
|
|
|
|
sbr->abs_bord_lead[ch] = bs_abs_bord;
|
|
sbr->abs_bord_trail[ch] = bs_abs_bord_1;
|
|
sbr->n_rel_lead[ch] = sbr->bs_num_rel_0[ch];
|
|
sbr->n_rel_trail[ch] = sbr->bs_num_rel_1[ch];
|
|
break;
|
|
}
|
|
|
|
if (sbr->bs_frame_class[ch] == VARVAR)
|
|
sbr->L_E[ch] = min(bs_num_env, 5);
|
|
else
|
|
sbr->L_E[ch] = min(bs_num_env, 4);
|
|
|
|
if (sbr->L_E[ch] <= 0)
|
|
return 1;
|
|
|
|
if (sbr->L_E[ch] > 1)
|
|
sbr->L_Q[ch] = 2;
|
|
else
|
|
sbr->L_Q[ch] = 1;
|
|
|
|
/* TODO: this code can probably be integrated into the code above! */
|
|
if ((result = envelope_time_border_vector(sbr, ch)) > 0)
|
|
{
|
|
sbr->bs_frame_class[ch] = saved_frame_class;
|
|
sbr->L_E[ch] = saved_L_E;
|
|
sbr->L_Q[ch] = saved_L_Q;
|
|
return result;
|
|
}
|
|
noise_floor_time_border_vector(sbr, ch);
|
|
|
|
#if 0
|
|
for (env = 0; env < bs_num_env; env++)
|
|
{
|
|
printf("freq_res[ch:%d][env:%d]: %d\n", ch, env, sbr->f[ch][env]);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* table 8 */
|
|
static void sbr_dtdf(bitfile *ld, sbr_info *sbr, uint8_t ch)
|
|
{
|
|
uint8_t i;
|
|
|
|
for (i = 0; i < sbr->L_E[ch]; i++)
|
|
{
|
|
sbr->bs_df_env[ch][i] = faad_get1bit(ld
|
|
DEBUGVAR(1,269,"sbr_dtdf(): bs_df_env"));
|
|
}
|
|
|
|
for (i = 0; i < sbr->L_Q[ch]; i++)
|
|
{
|
|
sbr->bs_df_noise[ch][i] = faad_get1bit(ld
|
|
DEBUGVAR(1,270,"sbr_dtdf(): bs_df_noise"));
|
|
}
|
|
}
|
|
|
|
/* table 9 */
|
|
static void invf_mode(bitfile *ld, sbr_info *sbr, uint8_t ch)
|
|
{
|
|
uint8_t n;
|
|
|
|
for (n = 0; n < sbr->N_Q; n++)
|
|
{
|
|
sbr->bs_invf_mode[ch][n] = (uint8_t)faad_getbits(ld, 2
|
|
DEBUGVAR(1,271,"invf_mode(): bs_invf_mode"));
|
|
}
|
|
}
|
|
|
|
static uint16_t sbr_extension(bitfile *ld, sbr_info *sbr,
|
|
uint8_t bs_extension_id, uint16_t num_bits_left)
|
|
{
|
|
switch (bs_extension_id)
|
|
{
|
|
#ifdef PS_DEC
|
|
case EXTENSION_ID_PS:
|
|
sbr->ps_used = 1;
|
|
if (!sbr->ps)
|
|
{
|
|
sbr->ps = ps_init(get_sr_index(sbr->sample_rate));
|
|
}
|
|
return ps_data(sbr->ps, ld);
|
|
#endif
|
|
#ifdef DRM_PS
|
|
case DRM_PARAMETRIC_STEREO:
|
|
sbr->ps_used = 1;
|
|
if (!sbr->drm_ps)
|
|
{
|
|
sbr->drm_ps = drm_ps_init();
|
|
}
|
|
return drm_ps_data(sbr->drm_ps, ld);
|
|
#endif
|
|
default:
|
|
sbr->bs_extension_data = (uint8_t)faad_getbits(ld, 6
|
|
DEBUGVAR(1,279,"sbr_single_channel_element(): bs_extension_data"));
|
|
return 6;
|
|
}
|
|
}
|
|
|
|
/* table 12 */
|
|
static void sinusoidal_coding(bitfile *ld, sbr_info *sbr, uint8_t ch)
|
|
{
|
|
uint8_t n;
|
|
|
|
for (n = 0; n < sbr->N_high; n++)
|
|
{
|
|
sbr->bs_add_harmonic[ch][n] = faad_get1bit(ld
|
|
DEBUGVAR(1,278,"sinusoidal_coding(): bs_add_harmonic"));
|
|
}
|
|
}
|
|
|
|
|
|
#endif /* SBR_DEC */
|