mirror of
https://github.com/mpv-player/mpv
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228ca70d48
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12528 b3059339-0415-0410-9bf9-f77b7e298cf2
480 lines
12 KiB
C
480 lines
12 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_dec.c,v 1.2 2003/10/03 22:22:27 alex 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 <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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sbr_info *sbrDecodeInit(uint16_t framelength, uint8_t id_aac,
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uint32_t sample_rate
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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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#ifdef DRM
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sbr->Is_DRM_SBR = IsDRM;
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#endif
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sbr->bs_samplerate_mode = 1;
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sbr->tHFGen = T_HFGEN;
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sbr->tHFAdj = T_HFADJ;
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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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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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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->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 < 64; 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 < 64; 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_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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{
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int16_t i, 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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if (sbr->frame == 0)
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{
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uint8_t j;
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sbr->qmfa[ch] = qmfa_init(32);
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sbr->qmfs[ch] = qmfs_init(64);
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for (j = 0; j < 5; j++)
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{
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sbr->G_temp_prev[ch][j] = faad_malloc(64*sizeof(real_t));
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sbr->Q_temp_prev[ch][j] = faad_malloc(64*sizeof(real_t));
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}
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memset(sbr->Xsbr[ch], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
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memset(sbr->Xcodec[ch], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*32 * sizeof(qmf_t));
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}
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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->Xcodec[ch], sbr->tHFGen, 32);
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else
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sbr_qmf_analysis_32(sbr, sbr->qmfa[ch], channel_buf, sbr->Xcodec[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->Xcodec[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->Xcodec[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->Xcodec[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 xover_band;
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if (l < sbr->t_E[ch][0])
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xover_band = sbr->kx_prev;
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else
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xover_band = sbr->kx;
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for (k = 0; k < xover_band; k++)
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{
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QMF_RE(X[l][k]) = QMF_RE(sbr->Xcodec[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->Xcodec[ch][l + sbr->tHFAdj][k]);
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#endif
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}
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for (k = xover_band; k < 64; 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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#ifdef SBR_LOW_POWER
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QMF_RE(X[l][xover_band - 1]) += QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][xover_band - 1]);
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#endif
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}
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}
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for (i = 0; i < sbr->tHFGen; i++)
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{
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memmove(sbr->Xcodec[ch][i], sbr->Xcodec[ch][i+sbr->numTimeSlotsRate], 32 * sizeof(qmf_t));
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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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}
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uint8_t sbrDecodeCoupleFrame(sbr_info *sbr, real_t *left_chan, real_t *right_chan,
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const uint8_t just_seeked, const uint8_t upsample_only)
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{
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uint8_t dont_process = 0;
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uint8_t ret = 0;
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ALIGN qmf_t X[MAX_NTSR][64];
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if (sbr == NULL)
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return 20;
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/* case can occur due to bit errors */
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if (sbr->id_aac != ID_CPE)
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return 21;
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if (sbr->ret || (sbr->header_count == 0))
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{
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/* don't process just upsample */
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dont_process = 1;
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/* Re-activate reset for next frame */
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if (sbr->ret && sbr->Reset)
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sbr->bs_start_freq_prev = -1;
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}
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if (just_seeked)
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{
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sbr->just_seeked = 1;
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} else {
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sbr->just_seeked = 0;
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}
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sbr_process_channel(sbr, left_chan, X, 0, dont_process);
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/* subband synthesis */
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#ifndef USE_SSE
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sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X, left_chan);
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#else
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sbr->qmfs[ch]->qmf_func(sbr, sbr->qmfs[0], X, left_chan);
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#endif
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sbr_process_channel(sbr, right_chan, X, 1, dont_process);
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/* subband synthesis */
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#ifndef USE_SSE
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sbr_qmf_synthesis_64(sbr, sbr->qmfs[1], X, right_chan);
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#else
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sbr->qmfs[ch]->qmf_func(sbr, sbr->qmfs[1], X, right_chan);
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#endif
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if (sbr->bs_header_flag)
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sbr->just_seeked = 0;
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if (sbr->header_count != 0 && sbr->ret == 0)
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{
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ret = sbr_save_prev_data(sbr, 0);
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if (ret) return ret;
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ret = sbr_save_prev_data(sbr, 1);
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if (ret) return ret;
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}
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sbr->frame++;
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return 0;
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}
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uint8_t sbrDecodeSingleFrame(sbr_info *sbr, real_t *channel,
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const uint8_t just_seeked, const uint8_t upsample_only)
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{
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uint8_t dont_process = 0;
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uint8_t ret = 0;
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ALIGN qmf_t X[MAX_NTSR][64];
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if (sbr == NULL)
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return 20;
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/* case can occur due to bit errors */
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if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
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return 21;
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if (sbr->ret || (sbr->header_count == 0))
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{
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/* don't process just upsample */
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dont_process = 1;
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/* Re-activate reset for next frame */
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if (sbr->ret && sbr->Reset)
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sbr->bs_start_freq_prev = -1;
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}
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if (just_seeked)
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{
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sbr->just_seeked = 1;
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} else {
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sbr->just_seeked = 0;
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}
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sbr_process_channel(sbr, channel, X, 0, dont_process);
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/* subband synthesis */
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#ifndef USE_SSE
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sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X, channel);
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#else
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sbr->qmfs[ch]->qmf_func(sbr, sbr->qmfs[0], X, channel);
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#endif
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if (sbr->bs_header_flag)
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sbr->just_seeked = 0;
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if (sbr->header_count != 0 && sbr->ret == 0)
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{
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ret = sbr_save_prev_data(sbr, 0);
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if (ret) return ret;
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}
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sbr->frame++;
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return 0;
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}
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static void ps_dummy_function(qmf_t X_mono[MAX_NTSR][64],
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qmf_t X_left[MAX_NTSR][64], qmf_t X_right[MAX_NTSR][64])
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{
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uint8_t i, j;
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for (i = 0; i < MAX_NTSR; i++)
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{
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for (j = 0; j < 64; j++)
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{
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QMF_RE(X_left[i][j]) = QMF_RE(X_mono[i][j]);
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QMF_RE(X_right[i][j]) = QMF_RE(X_mono[i][j]);
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#ifndef SBR_LOW_POWER
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QMF_IM(X_left[i][j]) = QMF_IM(X_mono[i][j]);
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QMF_IM(X_right[i][j]) = QMF_IM(X_mono[i][j]);
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#endif
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}
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}
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}
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#if (defined(PS_DEC) || defined(DRM_PS))
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uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
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const uint8_t just_seeked, const uint8_t upsample_only)
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{
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uint8_t dont_process = 0;
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uint8_t ret = 0;
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ALIGN qmf_t X_mono[MAX_NTSR][64];
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ALIGN qmf_t X_left[MAX_NTSR][64];
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ALIGN qmf_t X_right[MAX_NTSR][64];
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if (sbr == NULL)
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return 20;
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/* case can occur due to bit errors */
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if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
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return 21;
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if (sbr->ret || (sbr->header_count == 0))
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{
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/* don't process just upsample */
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dont_process = 1;
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/* Re-activate reset for next frame */
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if (sbr->ret && sbr->Reset)
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sbr->bs_start_freq_prev = -1;
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}
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if (just_seeked)
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{
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sbr->just_seeked = 1;
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} else {
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sbr->just_seeked = 0;
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}
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if (sbr->frame == 0)
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{
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sbr->qmfs[1] = qmfs_init(64);
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}
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sbr_process_channel(sbr, left_channel, X_mono, 0, dont_process);
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/* perform parametric stereo */
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ps_dummy_function(X_mono, X_left, X_right);
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/* subband synthesis */
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#ifndef USE_SSE
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sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X_left, left_channel);
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sbr_qmf_synthesis_64(sbr, sbr->qmfs[1], X_right, right_channel);
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#else
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sbr->qmfs[ch]->qmf_func(sbr, sbr->qmfs[0], X_left, left_channel);
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sbr->qmfs[ch]->qmf_func(sbr, sbr->qmfs[1], X_right, right_channel);
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#endif
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if (sbr->bs_header_flag)
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sbr->just_seeked = 0;
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if (sbr->header_count != 0 && sbr->ret == 0)
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{
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ret = sbr_save_prev_data(sbr, 0);
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if (ret) return ret;
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}
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sbr->frame++;
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return 0;
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}
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#endif
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#endif
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