615 lines
16 KiB
C
615 lines
16 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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#ifdef SBR_DEC
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#include <string.h>
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#include <stdlib.h>
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#include "syntax.h"
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#include "bits.h"
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#include "sbr_syntax.h"
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#include "sbr_qmf.h"
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#include "sbr_hfgen.h"
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#include "sbr_hfadj.h"
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/* static function declarations */
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static uint8_t sbr_save_prev_data(sbr_info *sbr, uint8_t ch);
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static void sbr_save_matrix(sbr_info *sbr, uint8_t ch);
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sbr_info *sbrDecodeInit(uint16_t framelength, uint8_t id_aac,
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uint32_t sample_rate, uint8_t downSampledSBR
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#ifdef DRM
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, uint8_t IsDRM
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#endif
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)
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{
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sbr_info *sbr = faad_malloc(sizeof(sbr_info));
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memset(sbr, 0, sizeof(sbr_info));
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/* save id of the parent element */
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sbr->id_aac = id_aac;
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sbr->sample_rate = sample_rate;
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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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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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sbr->bs_start_freq = 5;
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sbr->bs_amp_res = 1;
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sbr->bs_samplerate_mode = 1;
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sbr->prevEnvIsShort[0] = -1;
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sbr->prevEnvIsShort[1] = -1;
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sbr->header_count = 0;
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sbr->Reset = 1;
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#ifdef DRM
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sbr->Is_DRM_SBR = IsDRM;
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#endif
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sbr->tHFGen = T_HFGEN;
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sbr->tHFAdj = T_HFADJ;
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sbr->bsco = 0;
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sbr->bsco_prev = 0;
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sbr->M_prev = 0;
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sbr->frame_len = framelength;
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/* force sbr reset */
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sbr->bs_start_freq_prev = -1;
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if (framelength == 960)
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{
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sbr->numTimeSlotsRate = RATE * NO_TIME_SLOTS_960;
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sbr->numTimeSlots = NO_TIME_SLOTS_960;
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} else {
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sbr->numTimeSlotsRate = RATE * NO_TIME_SLOTS;
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sbr->numTimeSlots = NO_TIME_SLOTS;
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}
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sbr->GQ_ringbuf_index[0] = 0;
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sbr->GQ_ringbuf_index[1] = 0;
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if (id_aac == ID_CPE)
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{
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/* stereo */
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uint8_t j;
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sbr->qmfa[0] = qmfa_init(32);
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sbr->qmfa[1] = qmfa_init(32);
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sbr->qmfs[0] = qmfs_init((downSampledSBR)?32:64);
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sbr->qmfs[1] = qmfs_init((downSampledSBR)?32:64);
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for (j = 0; j < 5; j++)
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{
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sbr->G_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
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sbr->G_temp_prev[1][j] = faad_malloc(64*sizeof(real_t));
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sbr->Q_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
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sbr->Q_temp_prev[1][j] = faad_malloc(64*sizeof(real_t));
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}
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memset(sbr->Xsbr[0], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
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memset(sbr->Xsbr[1], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
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} else {
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/* mono */
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uint8_t j;
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sbr->qmfa[0] = qmfa_init(32);
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sbr->qmfs[0] = qmfs_init((downSampledSBR)?32:64);
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sbr->qmfs[1] = NULL;
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for (j = 0; j < 5; j++)
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{
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sbr->G_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
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sbr->Q_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
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}
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memset(sbr->Xsbr[0], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
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}
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return sbr;
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}
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void sbrDecodeEnd(sbr_info *sbr)
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{
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uint8_t j;
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if (sbr)
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{
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qmfa_end(sbr->qmfa[0]);
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qmfs_end(sbr->qmfs[0]);
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if (sbr->qmfs[1] != NULL)
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{
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qmfa_end(sbr->qmfa[1]);
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qmfs_end(sbr->qmfs[1]);
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}
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for (j = 0; j < 5; j++)
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{
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if (sbr->G_temp_prev[0][j]) faad_free(sbr->G_temp_prev[0][j]);
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if (sbr->Q_temp_prev[0][j]) faad_free(sbr->Q_temp_prev[0][j]);
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if (sbr->G_temp_prev[1][j]) faad_free(sbr->G_temp_prev[1][j]);
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if (sbr->Q_temp_prev[1][j]) faad_free(sbr->Q_temp_prev[1][j]);
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}
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#ifdef PS_DEC
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if (sbr->ps != NULL)
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ps_free(sbr->ps);
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#endif
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#ifdef DRM_PS
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if (sbr->drm_ps != NULL)
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drm_ps_free(sbr->drm_ps);
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#endif
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faad_free(sbr);
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}
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}
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static uint8_t sbr_save_prev_data(sbr_info *sbr, uint8_t ch)
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{
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uint8_t i;
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/* save data for next frame */
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sbr->kx_prev = sbr->kx;
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sbr->M_prev = sbr->M;
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sbr->bsco_prev = sbr->bsco;
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sbr->L_E_prev[ch] = sbr->L_E[ch];
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/* sbr->L_E[ch] can become 0 on files with bit errors */
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if (sbr->L_E[ch] <= 0)
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return 19;
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sbr->f_prev[ch] = sbr->f[ch][sbr->L_E[ch] - 1];
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for (i = 0; i < MAX_M; i++)
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{
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sbr->E_prev[ch][i] = sbr->E[ch][i][sbr->L_E[ch] - 1];
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sbr->Q_prev[ch][i] = sbr->Q[ch][i][sbr->L_Q[ch] - 1];
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}
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for (i = 0; i < MAX_M; i++)
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{
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sbr->bs_add_harmonic_prev[ch][i] = sbr->bs_add_harmonic[ch][i];
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}
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sbr->bs_add_harmonic_flag_prev[ch] = sbr->bs_add_harmonic_flag[ch];
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if (sbr->l_A[ch] == sbr->L_E[ch])
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sbr->prevEnvIsShort[ch] = 0;
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else
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sbr->prevEnvIsShort[ch] = -1;
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return 0;
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}
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static void sbr_save_matrix(sbr_info *sbr, uint8_t ch)
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{
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uint8_t i;
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for (i = 0; i < sbr->tHFGen; i++)
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{
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memmove(sbr->Xsbr[ch][i], sbr->Xsbr[ch][i+sbr->numTimeSlotsRate], 64 * sizeof(qmf_t));
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}
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for (i = sbr->tHFGen; i < MAX_NTSRHFG; i++)
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{
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memset(sbr->Xsbr[ch][i], 0, 64 * sizeof(qmf_t));
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}
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}
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static void sbr_process_channel(sbr_info *sbr, real_t *channel_buf, qmf_t X[MAX_NTSR][64],
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uint8_t ch, uint8_t dont_process,
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const uint8_t downSampledSBR)
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{
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int16_t k, l;
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#ifdef SBR_LOW_POWER
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ALIGN real_t deg[64];
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#endif
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#ifdef DRM
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if (sbr->Is_DRM_SBR)
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{
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sbr->bsco = max((int32_t)sbr->maxAACLine*32/(int32_t)sbr->frame_len - (int32_t)sbr->kx, 0);
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} else {
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#endif
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sbr->bsco = 0;
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#ifdef DRM
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}
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#endif
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//#define PRE_QMF_PRINT
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#ifdef PRE_QMF_PRINT
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{
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int i;
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for (i = 0; i < 1024; i++)
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{
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printf("%d\n", channel_buf[i]);
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}
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}
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#endif
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/* subband analysis */
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if (dont_process)
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sbr_qmf_analysis_32(sbr, sbr->qmfa[ch], channel_buf, sbr->Xsbr[ch], sbr->tHFGen, 32);
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else
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sbr_qmf_analysis_32(sbr, sbr->qmfa[ch], channel_buf, sbr->Xsbr[ch], sbr->tHFGen, sbr->kx);
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if (!dont_process)
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{
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#if 1
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/* insert high frequencies here */
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/* hf generation using patching */
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hf_generation(sbr, sbr->Xsbr[ch], sbr->Xsbr[ch]
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#ifdef SBR_LOW_POWER
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,deg
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#endif
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,ch);
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#endif
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#ifdef SBR_LOW_POWER
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for (l = sbr->t_E[ch][0]; l < sbr->t_E[ch][sbr->L_E[ch]]; l++)
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{
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for (k = 0; k < sbr->kx; k++)
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{
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QMF_RE(sbr->Xsbr[ch][sbr->tHFAdj + l][k]) = 0;
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}
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}
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#endif
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#if 1
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/* hf adjustment */
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hf_adjustment(sbr, sbr->Xsbr[ch]
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#ifdef SBR_LOW_POWER
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,deg
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#endif
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,ch);
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#endif
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}
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if ((sbr->just_seeked != 0) || dont_process)
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{
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for (l = 0; l < sbr->numTimeSlotsRate; l++)
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{
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for (k = 0; k < 32; k++)
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{
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QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
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#ifndef SBR_LOW_POWER
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QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
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#endif
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}
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for (k = 32; k < 64; k++)
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{
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QMF_RE(X[l][k]) = 0;
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#ifndef SBR_LOW_POWER
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QMF_IM(X[l][k]) = 0;
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#endif
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}
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}
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} else {
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for (l = 0; l < sbr->numTimeSlotsRate; l++)
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{
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uint8_t kx_band, M_band, bsco_band;
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if (l < sbr->t_E[ch][0])
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{
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kx_band = sbr->kx_prev;
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M_band = sbr->M_prev;
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bsco_band = sbr->bsco_prev;
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} else {
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kx_band = sbr->kx;
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M_band = sbr->M;
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bsco_band = sbr->bsco;
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}
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#ifndef SBR_LOW_POWER
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for (k = 0; k < kx_band + bsco_band; k++)
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{
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QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
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QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
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}
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for (k = kx_band + bsco_band; k < kx_band + M_band; k++)
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{
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QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
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QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
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}
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for (k = max(kx_band + bsco_band, kx_band + M_band); k < 64; k++)
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{
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QMF_RE(X[l][k]) = 0;
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|
|
QMF_IM(X[l][k]) = 0;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
for (k = 0; k < kx_band + bsco_band; k++)
|
||
|
|
{
|
||
|
|
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
|
||
|
|
}
|
||
|
|
for (k = kx_band + bsco_band; k < min(kx_band + M_band, 63); k++)
|
||
|
|
{
|
||
|
|
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
|
||
|
|
}
|
||
|
|
for (k = max(kx_band + bsco_band, kx_band + M_band); k < 64; k++)
|
||
|
|
{
|
||
|
|
QMF_RE(X[l][k]) = 0;
|
||
|
|
}
|
||
|
|
QMF_RE(X[l][kx_band - 1 + bsco_band]) +=
|
||
|
|
QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][kx_band - 1 + bsco_band]);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t sbrDecodeCoupleFrame(sbr_info *sbr, real_t *left_chan, real_t *right_chan,
|
||
|
|
const uint8_t just_seeked, const uint8_t downSampledSBR)
|
||
|
|
{
|
||
|
|
uint8_t dont_process = 0;
|
||
|
|
uint8_t ret = 0;
|
||
|
|
ALIGN qmf_t X[MAX_NTSR][64];
|
||
|
|
|
||
|
|
if (sbr == NULL)
|
||
|
|
return 20;
|
||
|
|
|
||
|
|
/* case can occur due to bit errors */
|
||
|
|
if (sbr->id_aac != ID_CPE)
|
||
|
|
return 21;
|
||
|
|
|
||
|
|
if (sbr->ret || (sbr->header_count == 0))
|
||
|
|
{
|
||
|
|
/* don't process just upsample */
|
||
|
|
dont_process = 1;
|
||
|
|
|
||
|
|
/* Re-activate reset for next frame */
|
||
|
|
if (sbr->ret && sbr->Reset)
|
||
|
|
sbr->bs_start_freq_prev = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (just_seeked)
|
||
|
|
{
|
||
|
|
sbr->just_seeked = 1;
|
||
|
|
} else {
|
||
|
|
sbr->just_seeked = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
sbr_process_channel(sbr, left_chan, X, 0, dont_process, downSampledSBR);
|
||
|
|
/* subband synthesis */
|
||
|
|
if (downSampledSBR)
|
||
|
|
{
|
||
|
|
sbr_qmf_synthesis_32(sbr, sbr->qmfs[0], X, left_chan);
|
||
|
|
} else {
|
||
|
|
sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X, left_chan);
|
||
|
|
}
|
||
|
|
|
||
|
|
sbr_process_channel(sbr, right_chan, X, 1, dont_process, downSampledSBR);
|
||
|
|
/* subband synthesis */
|
||
|
|
if (downSampledSBR)
|
||
|
|
{
|
||
|
|
sbr_qmf_synthesis_32(sbr, sbr->qmfs[1], X, right_chan);
|
||
|
|
} else {
|
||
|
|
sbr_qmf_synthesis_64(sbr, sbr->qmfs[1], X, right_chan);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sbr->bs_header_flag)
|
||
|
|
sbr->just_seeked = 0;
|
||
|
|
|
||
|
|
if (sbr->header_count != 0 && sbr->ret == 0)
|
||
|
|
{
|
||
|
|
ret = sbr_save_prev_data(sbr, 0);
|
||
|
|
if (ret) return ret;
|
||
|
|
ret = sbr_save_prev_data(sbr, 1);
|
||
|
|
if (ret) return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
sbr_save_matrix(sbr, 0);
|
||
|
|
sbr_save_matrix(sbr, 1);
|
||
|
|
|
||
|
|
sbr->frame++;
|
||
|
|
|
||
|
|
//#define POST_QMF_PRINT
|
||
|
|
#ifdef POST_QMF_PRINT
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < 2048; i++)
|
||
|
|
{
|
||
|
|
printf("%d\n", left_chan[i]);
|
||
|
|
}
|
||
|
|
for (i = 0; i < 2048; i++)
|
||
|
|
{
|
||
|
|
printf("%d\n", right_chan[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t sbrDecodeSingleFrame(sbr_info *sbr, real_t *channel,
|
||
|
|
const uint8_t just_seeked, const uint8_t downSampledSBR)
|
||
|
|
{
|
||
|
|
uint8_t dont_process = 0;
|
||
|
|
uint8_t ret = 0;
|
||
|
|
ALIGN qmf_t X[MAX_NTSR][64];
|
||
|
|
|
||
|
|
if (sbr == NULL)
|
||
|
|
return 20;
|
||
|
|
|
||
|
|
/* case can occur due to bit errors */
|
||
|
|
if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
|
||
|
|
return 21;
|
||
|
|
|
||
|
|
if (sbr->ret || (sbr->header_count == 0))
|
||
|
|
{
|
||
|
|
/* don't process just upsample */
|
||
|
|
dont_process = 1;
|
||
|
|
|
||
|
|
/* Re-activate reset for next frame */
|
||
|
|
if (sbr->ret && sbr->Reset)
|
||
|
|
sbr->bs_start_freq_prev = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (just_seeked)
|
||
|
|
{
|
||
|
|
sbr->just_seeked = 1;
|
||
|
|
} else {
|
||
|
|
sbr->just_seeked = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
sbr_process_channel(sbr, channel, X, 0, dont_process, downSampledSBR);
|
||
|
|
/* subband synthesis */
|
||
|
|
if (downSampledSBR)
|
||
|
|
{
|
||
|
|
sbr_qmf_synthesis_32(sbr, sbr->qmfs[0], X, channel);
|
||
|
|
} else {
|
||
|
|
sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X, channel);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sbr->bs_header_flag)
|
||
|
|
sbr->just_seeked = 0;
|
||
|
|
|
||
|
|
if (sbr->header_count != 0 && sbr->ret == 0)
|
||
|
|
{
|
||
|
|
ret = sbr_save_prev_data(sbr, 0);
|
||
|
|
if (ret) return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
sbr_save_matrix(sbr, 0);
|
||
|
|
|
||
|
|
sbr->frame++;
|
||
|
|
|
||
|
|
//#define POST_QMF_PRINT
|
||
|
|
#ifdef POST_QMF_PRINT
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < 2048; i++)
|
||
|
|
{
|
||
|
|
printf("%d\n", channel[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if (defined(PS_DEC) || defined(DRM_PS))
|
||
|
|
uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
|
||
|
|
const uint8_t just_seeked, const uint8_t downSampledSBR)
|
||
|
|
{
|
||
|
|
uint8_t l, k;
|
||
|
|
uint8_t dont_process = 0;
|
||
|
|
uint8_t ret = 0;
|
||
|
|
ALIGN qmf_t X_left[38][64] = {{0}};
|
||
|
|
ALIGN qmf_t X_right[38][64] = {{0}}; /* must set this to 0 */
|
||
|
|
|
||
|
|
if (sbr == NULL)
|
||
|
|
return 20;
|
||
|
|
|
||
|
|
/* case can occur due to bit errors */
|
||
|
|
if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
|
||
|
|
return 21;
|
||
|
|
|
||
|
|
if (sbr->ret || (sbr->header_count == 0))
|
||
|
|
{
|
||
|
|
/* don't process just upsample */
|
||
|
|
dont_process = 1;
|
||
|
|
|
||
|
|
/* Re-activate reset for next frame */
|
||
|
|
if (sbr->ret && sbr->Reset)
|
||
|
|
sbr->bs_start_freq_prev = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (just_seeked)
|
||
|
|
{
|
||
|
|
sbr->just_seeked = 1;
|
||
|
|
} else {
|
||
|
|
sbr->just_seeked = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sbr->qmfs[1] == NULL)
|
||
|
|
{
|
||
|
|
sbr->qmfs[1] = qmfs_init((downSampledSBR)?32:64);
|
||
|
|
}
|
||
|
|
|
||
|
|
sbr_process_channel(sbr, left_channel, X_left, 0, dont_process, downSampledSBR);
|
||
|
|
|
||
|
|
/* copy some extra data for PS */
|
||
|
|
for (l = 32; l < 38; l++)
|
||
|
|
{
|
||
|
|
for (k = 0; k < 5; k++)
|
||
|
|
{
|
||
|
|
QMF_RE(X_left[l][k]) = QMF_RE(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
|
||
|
|
QMF_IM(X_left[l][k]) = QMF_IM(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* perform parametric stereo */
|
||
|
|
#ifdef DRM_PS
|
||
|
|
if (sbr->Is_DRM_SBR)
|
||
|
|
{
|
||
|
|
drm_ps_decode(sbr->drm_ps, (sbr->ret > 0), sbr->sample_rate, X_left, X_right);
|
||
|
|
} else {
|
||
|
|
#endif
|
||
|
|
#ifdef PS_DEC
|
||
|
|
ps_decode(sbr->ps, X_left, X_right);
|
||
|
|
#endif
|
||
|
|
#ifdef DRM_PS
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* subband synthesis */
|
||
|
|
if (downSampledSBR)
|
||
|
|
{
|
||
|
|
sbr_qmf_synthesis_32(sbr, sbr->qmfs[0], X_left, left_channel);
|
||
|
|
sbr_qmf_synthesis_32(sbr, sbr->qmfs[1], X_right, right_channel);
|
||
|
|
} else {
|
||
|
|
sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X_left, left_channel);
|
||
|
|
sbr_qmf_synthesis_64(sbr, sbr->qmfs[1], X_right, right_channel);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sbr->bs_header_flag)
|
||
|
|
sbr->just_seeked = 0;
|
||
|
|
|
||
|
|
if (sbr->header_count != 0 && sbr->ret == 0)
|
||
|
|
{
|
||
|
|
ret = sbr_save_prev_data(sbr, 0);
|
||
|
|
if (ret) return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
sbr_save_matrix(sbr, 0);
|
||
|
|
|
||
|
|
sbr->frame++;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|