ref: 3ba088193fc0e9b022957fb348cfdfe1d60daab7
dir: /libfaad/sbr_dec.c/
/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** Any non-GPL usage of this software or parts of this software is strictly
** forbidden.
**
** The "appropriate copyright message" mentioned in section 2c of the GPLv2
** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
**
** $Id: sbr_dec.c,v 1.44 2009/01/26 22:32:31 menno Exp $
**/
#include "common.h"
#include "structs.h"
#ifdef SBR_DEC
#include "syntax.h"
#include "bits.h"
#include "sbr_syntax.h"
#include "sbr_qmf.h"
#include "sbr_hfgen.h"
#include "sbr_hfadj.h"
/* static function declarations */
static uint8_t sbr_save_prev_data(sbr_info *sbr, uint8_t ch);
static void sbr_save_matrix(sbr_info *sbr, uint8_t ch);
sbr_info *sbrDecodeInit(uint16_t framelength, uint8_t id_aac,
uint32_t sample_rate, uint8_t downSampledSBR
#ifdef DRM
, uint8_t IsDRM
#endif
)
{
sbr_info *sbr = faad_malloc(sizeof(sbr_info));
memset(sbr, 0, sizeof(sbr_info));
/* save id of the parent element */
sbr->id_aac = id_aac;
sbr->sample_rate = sample_rate;
sbr->bs_freq_scale = 2;
sbr->bs_alter_scale = 1;
sbr->bs_noise_bands = 2;
sbr->bs_limiter_bands = 2;
sbr->bs_limiter_gains = 2;
sbr->bs_interpol_freq = 1;
sbr->bs_smoothing_mode = 1;
sbr->bs_start_freq = 5;
sbr->bs_amp_res = 1;
sbr->bs_samplerate_mode = 1;
sbr->prevEnvIsShort[0] = -1;
sbr->prevEnvIsShort[1] = -1;
sbr->header_count = 0;
sbr->Reset = 1;
#ifdef DRM
sbr->Is_DRM_SBR = IsDRM;
#endif
sbr->tHFGen = T_HFGEN;
sbr->tHFAdj = T_HFADJ;
sbr->bsco = 0;
sbr->bsco_prev = 0;
sbr->M_prev = 0;
sbr->frame_len = framelength;
/* force sbr reset */
sbr->bs_start_freq_prev = -1;
if (framelength == 960)
{
sbr->numTimeSlotsRate = RATE * NO_TIME_SLOTS_960;
sbr->numTimeSlots = NO_TIME_SLOTS_960;
}
else if (framelength == 1024)
{
sbr->numTimeSlotsRate = RATE * NO_TIME_SLOTS;
sbr->numTimeSlots = NO_TIME_SLOTS;
}
else
{
faad_free(sbr);
return NULL;
}
sbr->GQ_ringbuf_index[0] = 0;
sbr->GQ_ringbuf_index[1] = 0;
if (id_aac == ID_CPE)
{
/* stereo */
uint8_t j;
sbr->qmfa[0] = qmfa_init(32);
sbr->qmfa[1] = qmfa_init(32);
sbr->qmfs[0] = qmfs_init((downSampledSBR)?32:64);
sbr->qmfs[1] = qmfs_init((downSampledSBR)?32:64);
for (j = 0; j < 5; j++)
{
sbr->G_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
sbr->G_temp_prev[1][j] = faad_malloc(64*sizeof(real_t));
sbr->Q_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
sbr->Q_temp_prev[1][j] = faad_malloc(64*sizeof(real_t));
}
memset(sbr->Xsbr[0], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
memset(sbr->Xsbr[1], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
} else {
/* mono */
uint8_t j;
sbr->qmfa[0] = qmfa_init(32);
sbr->qmfs[0] = qmfs_init((downSampledSBR)?32:64);
sbr->qmfs[1] = NULL;
for (j = 0; j < 5; j++)
{
sbr->G_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
sbr->Q_temp_prev[0][j] = faad_malloc(64*sizeof(real_t));
}
memset(sbr->Xsbr[0], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
}
return sbr;
}
void sbrDecodeEnd(sbr_info *sbr)
{
uint8_t j;
if (sbr)
{
qmfa_end(sbr->qmfa[0]);
qmfs_end(sbr->qmfs[0]);
if (sbr->qmfs[1] != NULL)
{
qmfa_end(sbr->qmfa[1]);
qmfs_end(sbr->qmfs[1]);
}
for (j = 0; j < 5; j++)
{
if (sbr->G_temp_prev[0][j]) faad_free(sbr->G_temp_prev[0][j]);
if (sbr->Q_temp_prev[0][j]) faad_free(sbr->Q_temp_prev[0][j]);
if (sbr->G_temp_prev[1][j]) faad_free(sbr->G_temp_prev[1][j]);
if (sbr->Q_temp_prev[1][j]) faad_free(sbr->Q_temp_prev[1][j]);
}
#ifdef PS_DEC
if (sbr->ps != NULL)
ps_free(sbr->ps);
#endif
#ifdef DRM_PS
if (sbr->drm_ps != NULL)
drm_ps_free(sbr->drm_ps);
#endif
faad_free(sbr);
}
}
void sbrReset(sbr_info *sbr)
{
uint8_t j;
if (sbr->qmfa[0] != NULL)
memset(sbr->qmfa[0]->x, 0, 2 * sbr->qmfa[0]->channels * 10 * sizeof(real_t));
if (sbr->qmfa[1] != NULL)
memset(sbr->qmfa[1]->x, 0, 2 * sbr->qmfa[1]->channels * 10 * sizeof(real_t));
if (sbr->qmfs[0] != NULL)
memset(sbr->qmfs[0]->v, 0, 2 * sbr->qmfs[0]->channels * 20 * sizeof(real_t));
if (sbr->qmfs[1] != NULL)
memset(sbr->qmfs[1]->v, 0, 2 * sbr->qmfs[1]->channels * 20 * sizeof(real_t));
for (j = 0; j < 5; j++)
{
if (sbr->G_temp_prev[0][j] != NULL)
memset(sbr->G_temp_prev[0][j], 0, 64*sizeof(real_t));
if (sbr->G_temp_prev[1][j] != NULL)
memset(sbr->G_temp_prev[1][j], 0, 64*sizeof(real_t));
if (sbr->Q_temp_prev[0][j] != NULL)
memset(sbr->Q_temp_prev[0][j], 0, 64*sizeof(real_t));
if (sbr->Q_temp_prev[1][j] != NULL)
memset(sbr->Q_temp_prev[1][j], 0, 64*sizeof(real_t));
}
memset(sbr->Xsbr[0], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
memset(sbr->Xsbr[1], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
sbr->GQ_ringbuf_index[0] = 0;
sbr->GQ_ringbuf_index[1] = 0;
sbr->header_count = 0;
sbr->Reset = 1;
sbr->L_E_prev[0] = 0;
sbr->L_E_prev[1] = 0;
sbr->bs_freq_scale = 2;
sbr->bs_alter_scale = 1;
sbr->bs_noise_bands = 2;
sbr->bs_limiter_bands = 2;
sbr->bs_limiter_gains = 2;
sbr->bs_interpol_freq = 1;
sbr->bs_smoothing_mode = 1;
sbr->bs_start_freq = 5;
sbr->bs_amp_res = 1;
sbr->bs_samplerate_mode = 1;
sbr->prevEnvIsShort[0] = -1;
sbr->prevEnvIsShort[1] = -1;
sbr->bsco = 0;
sbr->bsco_prev = 0;
sbr->M_prev = 0;
sbr->bs_start_freq_prev = -1;
sbr->f_prev[0] = 0;
sbr->f_prev[1] = 0;
for (j = 0; j < MAX_M; j++)
{
sbr->E_prev[0][j] = 0;
sbr->Q_prev[0][j] = 0;
sbr->E_prev[1][j] = 0;
sbr->Q_prev[1][j] = 0;
sbr->bs_add_harmonic_prev[0][j] = 0;
sbr->bs_add_harmonic_prev[1][j] = 0;
}
sbr->bs_add_harmonic_flag_prev[0] = 0;
sbr->bs_add_harmonic_flag_prev[1] = 0;
}
static uint8_t sbr_save_prev_data(sbr_info *sbr, uint8_t ch)
{
uint8_t i;
/* save data for next frame */
sbr->kx_prev = sbr->kx;
sbr->M_prev = sbr->M;
sbr->bsco_prev = sbr->bsco;
sbr->L_E_prev[ch] = sbr->L_E[ch];
/* sbr->L_E[ch] can become 0 on files with bit errors */
if (sbr->L_E[ch] <= 0)
return 19;
sbr->f_prev[ch] = sbr->f[ch][sbr->L_E[ch] - 1];
for (i = 0; i < MAX_M; i++)
{
sbr->E_prev[ch][i] = sbr->E[ch][i][sbr->L_E[ch] - 1];
sbr->Q_prev[ch][i] = sbr->Q[ch][i][sbr->L_Q[ch] - 1];
}
for (i = 0; i < MAX_M; i++)
{
sbr->bs_add_harmonic_prev[ch][i] = sbr->bs_add_harmonic[ch][i];
}
sbr->bs_add_harmonic_flag_prev[ch] = sbr->bs_add_harmonic_flag[ch];
if (sbr->l_A[ch] == sbr->L_E[ch])
sbr->prevEnvIsShort[ch] = 0;
else
sbr->prevEnvIsShort[ch] = -1;
return 0;
}
static void sbr_save_matrix(sbr_info *sbr, uint8_t ch)
{
uint8_t i;
for (i = 0; i < sbr->tHFGen; i++)
{
memmove(sbr->Xsbr[ch][i], sbr->Xsbr[ch][i+sbr->numTimeSlotsRate], 64 * sizeof(qmf_t));
}
for (i = sbr->tHFGen; i < MAX_NTSRHFG; i++)
{
memset(sbr->Xsbr[ch][i], 0, 64 * sizeof(qmf_t));
}
}
static uint8_t sbr_process_channel(sbr_info *sbr, real_t *channel_buf, qmf_t X[MAX_NTSR][64],
uint8_t ch, uint8_t dont_process,
const uint8_t downSampledSBR)
{
int16_t k, l;
uint8_t ret = 0;
#ifdef SBR_LOW_POWER
ALIGN real_t deg[64];
#endif
#ifdef DRM
if (sbr->Is_DRM_SBR)
{
sbr->bsco = max((int32_t)sbr->maxAACLine*32/(int32_t)sbr->frame_len - (int32_t)sbr->kx, 0);
} else {
#endif
sbr->bsco = 0;
#ifdef DRM
}
#endif
//#define PRE_QMF_PRINT
#ifdef PRE_QMF_PRINT
{
int i;
for (i = 0; i < 1024; i++)
{
printf("%d\n", channel_buf[i]);
}
}
#endif
/* subband analysis */
if (dont_process)
sbr_qmf_analysis_32(sbr, sbr->qmfa[ch], channel_buf, sbr->Xsbr[ch], sbr->tHFGen, 32);
else
sbr_qmf_analysis_32(sbr, sbr->qmfa[ch], channel_buf, sbr->Xsbr[ch], sbr->tHFGen, sbr->kx);
if (!dont_process)
{
#if 1
/* insert high frequencies here */
/* hf generation using patching */
hf_generation(sbr, sbr->Xsbr[ch], sbr->Xsbr[ch]
#ifdef SBR_LOW_POWER
,deg
#endif
,ch);
#endif
#if 0 //def SBR_LOW_POWER
for (l = sbr->t_E[ch][0]; l < sbr->t_E[ch][sbr->L_E[ch]]; l++)
{
for (k = 0; k < sbr->kx; k++)
{
QMF_RE(sbr->Xsbr[ch][sbr->tHFAdj + l][k]) = 0;
}
}
#endif
#if 1
/* hf adjustment */
ret = hf_adjustment(sbr, sbr->Xsbr[ch]
#ifdef SBR_LOW_POWER
,deg
#endif
,ch);
#endif
if (ret > 0)
{
dont_process = 1;
}
}
if ((sbr->just_seeked != 0) || dont_process)
{
for (l = 0; l < sbr->numTimeSlotsRate; l++)
{
for (k = 0; k < 32; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
#endif
}
for (k = 32; k < 64; k++)
{
QMF_RE(X[l][k]) = 0;
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = 0;
#endif
}
}
} else {
for (l = 0; l < sbr->numTimeSlotsRate; l++)
{
uint8_t kx_band, M_band, bsco_band;
if (l < sbr->t_E[ch][0])
{
kx_band = sbr->kx_prev;
M_band = sbr->M_prev;
bsco_band = sbr->bsco_prev;
} else {
kx_band = sbr->kx;
M_band = sbr->M;
bsco_band = sbr->bsco;
}
#ifndef SBR_LOW_POWER
for (k = 0; k < kx_band + bsco_band; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
}
for (k = kx_band + bsco_band; k < kx_band + M_band; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
QMF_IM(X[l][k]) = QMF_IM(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_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
}
}
return ret;
}
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->ret += 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->ret += 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->ret += 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->ret += sbr_process_channel(sbr, left_channel, X_left, 0, dont_process, downSampledSBR);
/* copy some extra data for PS */
for (l = sbr->numTimeSlotsRate; l < sbr->numTimeSlotsRate + 6; 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), 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