mirror of https://github.com/mpv-player/mpv
1123 lines
34 KiB
C
1123 lines
34 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 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: decoder.c,v 1.62 2003/07/29 08:20:12 menno Exp $
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**/
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#include "common.h"
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#include "structs.h"
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#include <stdlib.h>
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#include <string.h>
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#include "decoder.h"
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#include "mp4.h"
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#include "syntax.h"
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#include "specrec.h"
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#include "tns.h"
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#include "pns.h"
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#include "is.h"
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#include "ms.h"
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#include "ic_predict.h"
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#include "lt_predict.h"
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#include "drc.h"
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#include "error.h"
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#include "output.h"
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#include "dither.h"
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#ifdef SSR_DEC
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#include "ssr.h"
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#include "ssr_fb.h"
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#endif
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#ifdef SBR_DEC
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#include "sbr_dec.h"
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#endif
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#ifdef ANALYSIS
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uint16_t dbg_count;
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#endif
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int8_t* FAADAPI faacDecGetErrorMessage(uint8_t errcode)
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{
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if (errcode >= NUM_ERROR_MESSAGES)
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return NULL;
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return err_msg[errcode];
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}
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uint32_t FAADAPI faacDecGetCapabilities()
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{
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uint32_t cap = 0;
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/* can't do without it */
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cap += LC_DEC_CAP;
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#ifdef MAIN_DEC
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cap += MAIN_DEC_CAP;
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#endif
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#ifdef LTP_DEC
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cap += LTP_DEC_CAP;
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#endif
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#ifdef LD_DEC
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cap += LD_DEC_CAP;
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#endif
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#ifdef ERROR_RESILIENCE
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cap += ERROR_RESILIENCE_CAP;
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#endif
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#ifdef FIXED_POINT
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cap += FIXED_POINT_CAP;
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#endif
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return cap;
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}
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faacDecHandle FAADAPI faacDecOpen()
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{
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uint8_t i;
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faacDecHandle hDecoder = NULL;
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if ((hDecoder = (faacDecHandle)malloc(sizeof(faacDecStruct))) == NULL)
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return NULL;
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memset(hDecoder, 0, sizeof(faacDecStruct));
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hDecoder->config.outputFormat = FAAD_FMT_16BIT;
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hDecoder->config.defObjectType = MAIN;
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hDecoder->config.defSampleRate = 44100; /* Default: 44.1kHz */
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hDecoder->adts_header_present = 0;
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hDecoder->adif_header_present = 0;
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#ifdef ERROR_RESILIENCE
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hDecoder->aacSectionDataResilienceFlag = 0;
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hDecoder->aacScalefactorDataResilienceFlag = 0;
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hDecoder->aacSpectralDataResilienceFlag = 0;
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#endif
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hDecoder->frameLength = 1024;
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hDecoder->frame = 0;
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hDecoder->sample_buffer = NULL;
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for (i = 0; i < MAX_CHANNELS; i++)
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{
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hDecoder->window_shape_prev[i] = 0;
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hDecoder->time_out[i] = NULL;
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#ifdef SBR_DEC
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hDecoder->time_out2[i] = NULL;
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#endif
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#ifdef SSR_DEC
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hDecoder->ssr_overlap[i] = NULL;
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hDecoder->prev_fmd[i] = NULL;
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#endif
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#ifdef MAIN_DEC
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hDecoder->pred_stat[i] = NULL;
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#endif
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#ifdef LTP_DEC
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hDecoder->ltp_lag[i] = 0;
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hDecoder->lt_pred_stat[i] = NULL;
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#endif
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}
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#ifdef SBR_DEC
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for (i = 0; i < 32; i++)
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{
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hDecoder->sbr[i] = NULL;
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}
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#endif
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hDecoder->drc = drc_init(REAL_CONST(1.0), REAL_CONST(1.0));
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#if POW_TABLE_SIZE
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hDecoder->pow2_table = (real_t*)malloc(POW_TABLE_SIZE*sizeof(real_t));
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build_tables(hDecoder->pow2_table);
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#endif
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return hDecoder;
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}
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faacDecConfigurationPtr FAADAPI faacDecGetCurrentConfiguration(faacDecHandle hDecoder)
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{
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faacDecConfigurationPtr config = &(hDecoder->config);
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return config;
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}
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uint8_t FAADAPI faacDecSetConfiguration(faacDecHandle hDecoder,
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faacDecConfigurationPtr config)
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{
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hDecoder->config.defObjectType = config->defObjectType;
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hDecoder->config.defSampleRate = config->defSampleRate;
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hDecoder->config.outputFormat = config->outputFormat;
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hDecoder->config.downMatrix = config->downMatrix;
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/* OK */
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return 1;
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}
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int32_t FAADAPI faacDecInit(faacDecHandle hDecoder, uint8_t *buffer,
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uint32_t buffer_size,
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uint32_t *samplerate, uint8_t *channels)
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{
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uint32_t bits = 0;
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bitfile ld;
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adif_header adif;
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adts_header adts;
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hDecoder->sf_index = get_sr_index(hDecoder->config.defSampleRate);
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hDecoder->object_type = hDecoder->config.defObjectType;
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*samplerate = sample_rates[hDecoder->sf_index];
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*channels = 1;
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if (buffer != NULL)
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{
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faad_initbits(&ld, buffer, buffer_size);
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/* Check if an ADIF header is present */
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if ((buffer[0] == 'A') && (buffer[1] == 'D') &&
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(buffer[2] == 'I') && (buffer[3] == 'F'))
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{
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hDecoder->adif_header_present = 1;
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get_adif_header(&adif, &ld);
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faad_byte_align(&ld);
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hDecoder->sf_index = adif.pce[0].sf_index;
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hDecoder->object_type = adif.pce[0].object_type;
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*samplerate = sample_rates[hDecoder->sf_index];
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*channels = adif.pce[0].channels;
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memcpy(&(hDecoder->pce), &(adif.pce[0]), sizeof(program_config));
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hDecoder->pce_set = 1;
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bits = bit2byte(faad_get_processed_bits(&ld));
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/* Check if an ADTS header is present */
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} else if (faad_showbits(&ld, 12) == 0xfff) {
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hDecoder->adts_header_present = 1;
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adts_frame(&adts, &ld);
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hDecoder->sf_index = adts.sf_index;
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hDecoder->object_type = adts.profile;
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*samplerate = sample_rates[hDecoder->sf_index];
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*channels = (adts.channel_configuration > 6) ?
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2 : adts.channel_configuration;
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}
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if (ld.error)
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{
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faad_endbits(&ld);
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return -1;
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}
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faad_endbits(&ld);
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}
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hDecoder->channelConfiguration = *channels;
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/* must be done before frameLength is divided by 2 for LD */
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#ifdef SSR_DEC
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if (hDecoder->object_type == SSR)
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hDecoder->fb = ssr_filter_bank_init(hDecoder->frameLength/SSR_BANDS);
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else
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#endif
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hDecoder->fb = filter_bank_init(hDecoder->frameLength);
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#ifdef LD_DEC
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if (hDecoder->object_type == LD)
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hDecoder->frameLength >>= 1;
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#endif
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if (can_decode_ot(hDecoder->object_type) < 0)
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return -1;
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#ifndef FIXED_POINT
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if (hDecoder->config.outputFormat >= FAAD_FMT_DITHER_LOWEST)
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Init_Dither(16, hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST);
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#endif
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return bits;
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}
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/* Init the library using a DecoderSpecificInfo */
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int8_t FAADAPI faacDecInit2(faacDecHandle hDecoder, uint8_t *pBuffer,
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uint32_t SizeOfDecoderSpecificInfo,
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uint32_t *samplerate, uint8_t *channels)
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{
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int8_t rc;
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mp4AudioSpecificConfig mp4ASC;
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hDecoder->adif_header_present = 0;
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hDecoder->adts_header_present = 0;
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if((hDecoder == NULL)
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|| (pBuffer == NULL)
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|| (SizeOfDecoderSpecificInfo < 2)
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|| (samplerate == NULL)
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|| (channels == NULL))
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{
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return -1;
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}
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/* decode the audio specific config */
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rc = AudioSpecificConfig2(pBuffer, SizeOfDecoderSpecificInfo, &mp4ASC,
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&(hDecoder->pce));
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/* copy the relevant info to the decoder handle */
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*samplerate = mp4ASC.samplingFrequency;
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if (mp4ASC.channelsConfiguration)
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{
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*channels = mp4ASC.channelsConfiguration;
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} else {
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*channels = hDecoder->pce.channels;
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hDecoder->pce_set = 1;
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}
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hDecoder->sf_index = mp4ASC.samplingFrequencyIndex;
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hDecoder->object_type = mp4ASC.objectTypeIndex;
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hDecoder->aacSectionDataResilienceFlag = mp4ASC.aacSectionDataResilienceFlag;
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hDecoder->aacScalefactorDataResilienceFlag = mp4ASC.aacScalefactorDataResilienceFlag;
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hDecoder->aacSpectralDataResilienceFlag = mp4ASC.aacSpectralDataResilienceFlag;
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#ifdef SBR_DEC
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hDecoder->sbr_present_flag = mp4ASC.sbr_present_flag;
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/* AAC core decoder samplerate is 2 times as low */
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if (hDecoder->sbr_present_flag == 1)
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{
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hDecoder->sf_index = get_sr_index(mp4ASC.samplingFrequency / 2);
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}
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#endif
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if (hDecoder->object_type < 5)
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hDecoder->object_type--; /* For AAC differs from MPEG-4 */
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if (rc != 0)
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{
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return rc;
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}
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hDecoder->channelConfiguration = mp4ASC.channelsConfiguration;
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if (mp4ASC.frameLengthFlag)
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hDecoder->frameLength = 960;
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/* must be done before frameLength is divided by 2 for LD */
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#ifdef SSR_DEC
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if (hDecoder->object_type == SSR)
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hDecoder->fb = ssr_filter_bank_init(hDecoder->frameLength/SSR_BANDS);
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else
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#endif
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hDecoder->fb = filter_bank_init(hDecoder->frameLength);
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#ifdef LD_DEC
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if (hDecoder->object_type == LD)
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hDecoder->frameLength >>= 1;
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#endif
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#ifndef FIXED_POINT
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if (hDecoder->config.outputFormat >= FAAD_FMT_DITHER_LOWEST)
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Init_Dither(16, hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST);
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#endif
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return 0;
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}
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int8_t FAADAPI faacDecInitDRM(faacDecHandle hDecoder, uint32_t samplerate,
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uint8_t channels)
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{
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/* Special object type defined for DRM */
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hDecoder->config.defObjectType = DRM_ER_LC;
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hDecoder->config.defSampleRate = samplerate;
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hDecoder->aacSectionDataResilienceFlag = 1; /* VCB11 */
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hDecoder->aacScalefactorDataResilienceFlag = 0; /* no RVLC */
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hDecoder->aacSpectralDataResilienceFlag = 1; /* HCR */
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hDecoder->frameLength = 960;
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hDecoder->sf_index = get_sr_index(hDecoder->config.defSampleRate);
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hDecoder->object_type = hDecoder->config.defObjectType;
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hDecoder->channelConfiguration = channels;
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/* must be done before frameLength is divided by 2 for LD */
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hDecoder->fb = filter_bank_init(hDecoder->frameLength);
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#ifndef FIXED_POINT
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if (hDecoder->config.outputFormat >= FAAD_FMT_DITHER_LOWEST)
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Init_Dither(16, hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST);
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#endif
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return 0;
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}
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void FAADAPI faacDecClose(faacDecHandle hDecoder)
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{
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uint8_t i;
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if (hDecoder == NULL)
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return;
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for (i = 0; i < MAX_CHANNELS; i++)
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{
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if (hDecoder->time_out[i]) free(hDecoder->time_out[i]);
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#ifdef SBR_DEC
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if (hDecoder->time_out2[i]) free(hDecoder->time_out2[i]);
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#endif
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#ifdef SSR_DEC
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if (hDecoder->ssr_overlap[i]) free(hDecoder->ssr_overlap[i]);
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if (hDecoder->prev_fmd[i]) free(hDecoder->prev_fmd[i]);
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#endif
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#ifdef MAIN_DEC
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if (hDecoder->pred_stat[i]) free(hDecoder->pred_stat[i]);
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#endif
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#ifdef LTP_DEC
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if (hDecoder->lt_pred_stat[i]) free(hDecoder->lt_pred_stat[i]);
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#endif
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}
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#ifdef SSR_DEC
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if (hDecoder->object_type == SSR)
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ssr_filter_bank_end(hDecoder->fb);
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else
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#endif
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filter_bank_end(hDecoder->fb);
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drc_end(hDecoder->drc);
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#ifndef FIXED_POINT
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#if POW_TABLE_SIZE
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if (hDecoder->pow2_table) free(hDecoder->pow2_table);
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#endif
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#endif
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if (hDecoder->sample_buffer) free(hDecoder->sample_buffer);
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#ifdef SBR_DEC
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for (i = 0; i < 32; i++)
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{
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if (hDecoder->sbr[i])
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sbrDecodeEnd(hDecoder->sbr[i]);
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}
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#endif
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||
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if (hDecoder) free(hDecoder);
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}
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||
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|
||
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void FAADAPI faacDecPostSeekReset(faacDecHandle hDecoder, int32_t frame)
|
||
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{
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||
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if (hDecoder)
|
||
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{
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||
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hDecoder->postSeekResetFlag = 1;
|
||
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||
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if (frame != -1)
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hDecoder->frame = frame;
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}
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||
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}
|
||
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|
||
|
void create_channel_config(faacDecHandle hDecoder, faacDecFrameInfo *hInfo)
|
||
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{
|
||
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hInfo->num_front_channels = 0;
|
||
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hInfo->num_side_channels = 0;
|
||
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hInfo->num_back_channels = 0;
|
||
|
hInfo->num_lfe_channels = 0;
|
||
|
memset(hInfo->channel_position, 0, MAX_CHANNELS*sizeof(uint8_t));
|
||
|
|
||
|
if (hDecoder->downMatrix)
|
||
|
{
|
||
|
hInfo->num_front_channels = 2;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[1] = FRONT_CHANNEL_RIGHT;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
/* check if there is a PCE */
|
||
|
if (hDecoder->pce_set)
|
||
|
{
|
||
|
uint8_t i, chpos = 0;
|
||
|
uint8_t chdir, back_center = 0;
|
||
|
|
||
|
hInfo->num_front_channels = hDecoder->pce.num_front_channels;
|
||
|
hInfo->num_side_channels = hDecoder->pce.num_side_channels;
|
||
|
hInfo->num_back_channels = hDecoder->pce.num_back_channels;
|
||
|
hInfo->num_lfe_channels = hDecoder->pce.num_lfe_channels;
|
||
|
|
||
|
chdir = hInfo->num_front_channels;
|
||
|
if (chdir & 1)
|
||
|
{
|
||
|
hInfo->channel_position[chpos++] = FRONT_CHANNEL_CENTER;
|
||
|
chdir--;
|
||
|
}
|
||
|
for (i = 0; i < chdir; i += 2)
|
||
|
{
|
||
|
hInfo->channel_position[chpos++] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[chpos++] = FRONT_CHANNEL_RIGHT;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < hInfo->num_side_channels; i += 2)
|
||
|
{
|
||
|
hInfo->channel_position[chpos++] = SIDE_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[chpos++] = SIDE_CHANNEL_RIGHT;
|
||
|
}
|
||
|
|
||
|
chdir = hInfo->num_back_channels;
|
||
|
if (chdir & 1)
|
||
|
{
|
||
|
back_center = 1;
|
||
|
chdir--;
|
||
|
}
|
||
|
for (i = 0; i < chdir; i += 2)
|
||
|
{
|
||
|
hInfo->channel_position[chpos++] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[chpos++] = BACK_CHANNEL_RIGHT;
|
||
|
}
|
||
|
if (back_center)
|
||
|
{
|
||
|
hInfo->channel_position[chpos++] = BACK_CHANNEL_CENTER;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < hInfo->num_lfe_channels; i++)
|
||
|
{
|
||
|
hInfo->channel_position[chpos++] = LFE_CHANNEL;
|
||
|
}
|
||
|
|
||
|
} else {
|
||
|
switch (hDecoder->channelConfiguration)
|
||
|
{
|
||
|
case 1:
|
||
|
hInfo->num_front_channels = 1;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
break;
|
||
|
case 2:
|
||
|
hInfo->num_front_channels = 2;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[1] = FRONT_CHANNEL_RIGHT;
|
||
|
break;
|
||
|
case 3:
|
||
|
hInfo->num_front_channels = 3;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
|
||
|
break;
|
||
|
case 4:
|
||
|
hInfo->num_front_channels = 3;
|
||
|
hInfo->num_back_channels = 1;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
|
||
|
hInfo->channel_position[3] = BACK_CHANNEL_CENTER;
|
||
|
break;
|
||
|
case 5:
|
||
|
hInfo->num_front_channels = 3;
|
||
|
hInfo->num_back_channels = 2;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
|
||
|
hInfo->channel_position[3] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[4] = BACK_CHANNEL_RIGHT;
|
||
|
break;
|
||
|
case 6:
|
||
|
hInfo->num_front_channels = 3;
|
||
|
hInfo->num_back_channels = 2;
|
||
|
hInfo->num_lfe_channels = 1;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
|
||
|
hInfo->channel_position[3] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[4] = BACK_CHANNEL_RIGHT;
|
||
|
hInfo->channel_position[5] = LFE_CHANNEL;
|
||
|
break;
|
||
|
case 7:
|
||
|
hInfo->num_front_channels = 3;
|
||
|
hInfo->num_side_channels = 2;
|
||
|
hInfo->num_back_channels = 2;
|
||
|
hInfo->num_lfe_channels = 1;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
hInfo->channel_position[1] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[2] = FRONT_CHANNEL_RIGHT;
|
||
|
hInfo->channel_position[3] = SIDE_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[4] = SIDE_CHANNEL_RIGHT;
|
||
|
hInfo->channel_position[5] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[6] = BACK_CHANNEL_RIGHT;
|
||
|
hInfo->channel_position[7] = LFE_CHANNEL;
|
||
|
break;
|
||
|
default: /* channelConfiguration == 0 || channelConfiguration > 7 */
|
||
|
{
|
||
|
uint8_t i;
|
||
|
uint8_t ch = hDecoder->fr_channels - hDecoder->has_lfe;
|
||
|
if (ch & 1) /* there's either a center front or a center back channel */
|
||
|
{
|
||
|
uint8_t ch1 = (ch-1)/2;
|
||
|
if (hDecoder->first_syn_ele == ID_SCE)
|
||
|
{
|
||
|
hInfo->num_front_channels = ch1 + 1;
|
||
|
hInfo->num_back_channels = ch1;
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
for (i = 1; i <= ch1; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
|
||
|
}
|
||
|
for (i = ch1+1; i < ch; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
|
||
|
}
|
||
|
} else {
|
||
|
hInfo->num_front_channels = ch1;
|
||
|
hInfo->num_back_channels = ch1 + 1;
|
||
|
for (i = 0; i < ch1; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
|
||
|
}
|
||
|
for (i = ch1; i < ch-1; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
|
||
|
}
|
||
|
hInfo->channel_position[ch-1] = BACK_CHANNEL_CENTER;
|
||
|
}
|
||
|
} else {
|
||
|
uint8_t ch1 = (ch)/2;
|
||
|
hInfo->num_front_channels = ch1;
|
||
|
hInfo->num_back_channels = ch1;
|
||
|
if (ch1 & 1)
|
||
|
{
|
||
|
hInfo->channel_position[0] = FRONT_CHANNEL_CENTER;
|
||
|
for (i = 1; i <= ch1; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
|
||
|
}
|
||
|
for (i = ch1+1; i < ch-1; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
|
||
|
}
|
||
|
hInfo->channel_position[ch-1] = BACK_CHANNEL_CENTER;
|
||
|
} else {
|
||
|
for (i = 0; i < ch1; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = FRONT_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = FRONT_CHANNEL_RIGHT;
|
||
|
}
|
||
|
for (i = ch1; i < ch; i+=2)
|
||
|
{
|
||
|
hInfo->channel_position[i] = BACK_CHANNEL_LEFT;
|
||
|
hInfo->channel_position[i+1] = BACK_CHANNEL_RIGHT;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
hInfo->num_lfe_channels = hDecoder->has_lfe;
|
||
|
for (i = ch; i < hDecoder->fr_channels; i++)
|
||
|
{
|
||
|
hInfo->channel_position[i] = LFE_CHANNEL;
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void* FAADAPI faacDecDecode(faacDecHandle hDecoder,
|
||
|
faacDecFrameInfo *hInfo,
|
||
|
uint8_t *buffer, uint32_t buffer_size)
|
||
|
{
|
||
|
int32_t i;
|
||
|
uint8_t ch;
|
||
|
adts_header adts;
|
||
|
uint8_t channels = 0, ch_ele = 0;
|
||
|
uint8_t output_channels = 0;
|
||
|
bitfile *ld = (bitfile*)malloc(sizeof(bitfile));
|
||
|
|
||
|
/* local copys of globals */
|
||
|
uint8_t sf_index = hDecoder->sf_index;
|
||
|
uint8_t object_type = hDecoder->object_type;
|
||
|
uint8_t channelConfiguration = hDecoder->channelConfiguration;
|
||
|
#ifdef MAIN_DEC
|
||
|
pred_state **pred_stat = hDecoder->pred_stat;
|
||
|
#endif
|
||
|
#ifdef LTP_DEC
|
||
|
real_t **lt_pred_stat = hDecoder->lt_pred_stat;
|
||
|
#endif
|
||
|
#ifndef FIXED_POINT
|
||
|
#if POW_TABLE_SIZE
|
||
|
real_t *pow2_table = hDecoder->pow2_table;
|
||
|
#else
|
||
|
real_t *pow2_table = NULL;
|
||
|
#endif
|
||
|
#endif
|
||
|
uint8_t *window_shape_prev = hDecoder->window_shape_prev;
|
||
|
real_t **time_out = hDecoder->time_out;
|
||
|
#ifdef SBR_DEC
|
||
|
real_t **time_out2 = hDecoder->time_out2;
|
||
|
#endif
|
||
|
#ifdef SSR_DEC
|
||
|
real_t **ssr_overlap = hDecoder->ssr_overlap;
|
||
|
real_t **prev_fmd = hDecoder->prev_fmd;
|
||
|
#endif
|
||
|
fb_info *fb = hDecoder->fb;
|
||
|
drc_info *drc = hDecoder->drc;
|
||
|
uint8_t outputFormat = hDecoder->config.outputFormat;
|
||
|
#ifdef LTP_DEC
|
||
|
uint16_t *ltp_lag = hDecoder->ltp_lag;
|
||
|
#endif
|
||
|
program_config *pce = &hDecoder->pce;
|
||
|
|
||
|
element *syntax_elements[MAX_SYNTAX_ELEMENTS];
|
||
|
element **elements;
|
||
|
int16_t *spec_data[MAX_CHANNELS];
|
||
|
real_t *spec_coef[MAX_CHANNELS];
|
||
|
|
||
|
uint16_t frame_len = hDecoder->frameLength;
|
||
|
|
||
|
void *sample_buffer;
|
||
|
|
||
|
|
||
|
memset(hInfo, 0, sizeof(faacDecFrameInfo));
|
||
|
|
||
|
/* initialize the bitstream */
|
||
|
faad_initbits(ld, buffer, buffer_size);
|
||
|
|
||
|
#ifdef DRM
|
||
|
if (object_type == DRM_ER_LC)
|
||
|
{
|
||
|
faad_getbits(ld, 8
|
||
|
DEBUGVAR(1,1,"faacDecDecode(): skip CRC"));
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
if (hDecoder->adts_header_present)
|
||
|
{
|
||
|
if ((hInfo->error = adts_frame(&adts, ld)) > 0)
|
||
|
goto error;
|
||
|
|
||
|
/* MPEG2 does byte_alignment() here,
|
||
|
* but ADTS header is always multiple of 8 bits in MPEG2
|
||
|
* so not needed to actually do it.
|
||
|
*/
|
||
|
}
|
||
|
|
||
|
#ifdef ANALYSIS
|
||
|
dbg_count = 0;
|
||
|
#endif
|
||
|
|
||
|
elements = syntax_elements;
|
||
|
|
||
|
/* decode the complete bitstream */
|
||
|
elements = raw_data_block(hDecoder, hInfo, ld, syntax_elements,
|
||
|
spec_data, spec_coef, pce, drc);
|
||
|
|
||
|
ch_ele = hDecoder->fr_ch_ele;
|
||
|
channels = hDecoder->fr_channels;
|
||
|
|
||
|
if (hInfo->error > 0)
|
||
|
goto error;
|
||
|
|
||
|
|
||
|
/* no more bit reading after this */
|
||
|
hInfo->bytesconsumed = bit2byte(faad_get_processed_bits(ld));
|
||
|
if (ld->error)
|
||
|
{
|
||
|
hInfo->error = 14;
|
||
|
goto error;
|
||
|
}
|
||
|
faad_endbits(ld);
|
||
|
if (ld) free(ld);
|
||
|
ld = NULL;
|
||
|
|
||
|
if (!hDecoder->adts_header_present && !hDecoder->adif_header_present)
|
||
|
{
|
||
|
if (channels != hDecoder->channelConfiguration)
|
||
|
hDecoder->channelConfiguration = channels;
|
||
|
|
||
|
if (channels == 8) /* 7.1 */
|
||
|
hDecoder->channelConfiguration = 7;
|
||
|
if (channels == 7) /* not a standard channelConfiguration */
|
||
|
hDecoder->channelConfiguration = 0;
|
||
|
}
|
||
|
|
||
|
if ((channels == 5 || channels == 6) && hDecoder->config.downMatrix)
|
||
|
{
|
||
|
hDecoder->downMatrix = 1;
|
||
|
output_channels = 2;
|
||
|
} else {
|
||
|
output_channels = channels;
|
||
|
}
|
||
|
|
||
|
/* Make a channel configuration based on either a PCE or a channelConfiguration */
|
||
|
create_channel_config(hDecoder, hInfo);
|
||
|
|
||
|
/* number of samples in this frame */
|
||
|
hInfo->samples = frame_len*output_channels;
|
||
|
/* number of channels in this frame */
|
||
|
hInfo->channels = output_channels;
|
||
|
/* samplerate */
|
||
|
hInfo->samplerate = sample_rates[hDecoder->sf_index];
|
||
|
|
||
|
/* check if frame has channel elements */
|
||
|
if (channels == 0)
|
||
|
{
|
||
|
hDecoder->frame++;
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
if (hDecoder->sample_buffer == NULL)
|
||
|
{
|
||
|
#ifdef SBR_DEC
|
||
|
if (hDecoder->sbr_present_flag == 1)
|
||
|
{
|
||
|
if (hDecoder->config.outputFormat == FAAD_FMT_DOUBLE)
|
||
|
hDecoder->sample_buffer = malloc(2*frame_len*channels*sizeof(double));
|
||
|
else
|
||
|
hDecoder->sample_buffer = malloc(2*frame_len*channels*sizeof(real_t));
|
||
|
} else {
|
||
|
#endif
|
||
|
if (hDecoder->config.outputFormat == FAAD_FMT_DOUBLE)
|
||
|
hDecoder->sample_buffer = malloc(frame_len*channels*sizeof(double));
|
||
|
else
|
||
|
hDecoder->sample_buffer = malloc(frame_len*channels*sizeof(real_t));
|
||
|
#ifdef SBR_DEC
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
sample_buffer = hDecoder->sample_buffer;
|
||
|
|
||
|
/* noiseless coding is done, the rest of the tools come now */
|
||
|
for (ch = 0; ch < channels; ch++)
|
||
|
{
|
||
|
ic_stream *ics;
|
||
|
|
||
|
/* find the syntax element to which this channel belongs */
|
||
|
if (syntax_elements[hDecoder->channel_element[ch]]->channel == ch)
|
||
|
ics = &(syntax_elements[hDecoder->channel_element[ch]]->ics1);
|
||
|
else if (syntax_elements[hDecoder->channel_element[ch]]->paired_channel == ch)
|
||
|
ics = &(syntax_elements[hDecoder->channel_element[ch]]->ics2);
|
||
|
|
||
|
/* inverse quantization */
|
||
|
inverse_quantization(spec_coef[ch], spec_data[ch], frame_len);
|
||
|
|
||
|
/* apply scalefactors */
|
||
|
#ifdef FIXED_POINT
|
||
|
apply_scalefactors(hDecoder, ics, spec_coef[ch], frame_len);
|
||
|
#else
|
||
|
apply_scalefactors(ics, spec_coef[ch], pow2_table, frame_len);
|
||
|
#endif
|
||
|
|
||
|
/* deinterleave short block grouping */
|
||
|
if (ics->window_sequence == EIGHT_SHORT_SEQUENCE)
|
||
|
quant_to_spec(ics, spec_coef[ch], frame_len);
|
||
|
}
|
||
|
|
||
|
/* Because for ms, is and pns both channels spectral coefficients are needed
|
||
|
we have to restart running through all channels here.
|
||
|
*/
|
||
|
for (ch = 0; ch < channels; ch++)
|
||
|
{
|
||
|
int16_t pch = -1;
|
||
|
uint8_t right_channel;
|
||
|
ic_stream *ics, *icsr;
|
||
|
ltp_info *ltp;
|
||
|
|
||
|
/* find the syntax element to which this channel belongs */
|
||
|
if (syntax_elements[hDecoder->channel_element[ch]]->channel == ch)
|
||
|
{
|
||
|
ics = &(syntax_elements[hDecoder->channel_element[ch]]->ics1);
|
||
|
icsr = &(syntax_elements[hDecoder->channel_element[ch]]->ics2);
|
||
|
ltp = &(ics->ltp);
|
||
|
pch = syntax_elements[hDecoder->channel_element[ch]]->paired_channel;
|
||
|
right_channel = 0;
|
||
|
} else if (syntax_elements[hDecoder->channel_element[ch]]->paired_channel == ch) {
|
||
|
ics = &(syntax_elements[hDecoder->channel_element[ch]]->ics2);
|
||
|
if (syntax_elements[hDecoder->channel_element[ch]]->common_window)
|
||
|
ltp = &(ics->ltp2);
|
||
|
else
|
||
|
ltp = &(ics->ltp);
|
||
|
right_channel = 1;
|
||
|
}
|
||
|
|
||
|
/* pns decoding */
|
||
|
if ((!right_channel) && (pch != -1) && (ics->ms_mask_present))
|
||
|
pns_decode(ics, icsr, spec_coef[ch], spec_coef[pch], frame_len, 1);
|
||
|
else if ((pch == -1) || ((pch != -1) && (!ics->ms_mask_present)))
|
||
|
pns_decode(ics, NULL, spec_coef[ch], NULL, frame_len, 0);
|
||
|
|
||
|
if (!right_channel && (pch != -1))
|
||
|
{
|
||
|
/* mid/side decoding */
|
||
|
ms_decode(ics, icsr, spec_coef[ch], spec_coef[pch], frame_len);
|
||
|
|
||
|
/* intensity stereo decoding */
|
||
|
is_decode(ics, icsr, spec_coef[ch], spec_coef[pch], frame_len);
|
||
|
}
|
||
|
|
||
|
#ifdef MAIN_DEC
|
||
|
/* MAIN object type prediction */
|
||
|
if (object_type == MAIN)
|
||
|
{
|
||
|
/* allocate the state only when needed */
|
||
|
if (pred_stat[ch] == NULL)
|
||
|
{
|
||
|
pred_stat[ch] = (pred_state*)malloc(frame_len * sizeof(pred_state));
|
||
|
reset_all_predictors(pred_stat[ch], frame_len);
|
||
|
}
|
||
|
|
||
|
/* intra channel prediction */
|
||
|
ic_prediction(ics, spec_coef[ch], pred_stat[ch], frame_len);
|
||
|
|
||
|
/* In addition, for scalefactor bands coded by perceptual
|
||
|
noise substitution the predictors belonging to the
|
||
|
corresponding spectral coefficients are reset.
|
||
|
*/
|
||
|
pns_reset_pred_state(ics, pred_stat[ch]);
|
||
|
}
|
||
|
#endif
|
||
|
#ifdef LTP_DEC
|
||
|
if ((object_type == LTP)
|
||
|
#ifdef ERROR_RESILIENCE
|
||
|
|| (object_type == ER_LTP)
|
||
|
#endif
|
||
|
#ifdef LD_DEC
|
||
|
|| (object_type == LD)
|
||
|
#endif
|
||
|
)
|
||
|
{
|
||
|
#ifdef LD_DEC
|
||
|
if (object_type == LD)
|
||
|
{
|
||
|
if (ltp->data_present)
|
||
|
{
|
||
|
if (ltp->lag_update)
|
||
|
ltp_lag[ch] = ltp->lag;
|
||
|
}
|
||
|
ltp->lag = ltp_lag[ch];
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* allocate the state only when needed */
|
||
|
if (lt_pred_stat[ch] == NULL)
|
||
|
{
|
||
|
lt_pred_stat[ch] = (real_t*)malloc(frame_len*4 * sizeof(real_t));
|
||
|
memset(lt_pred_stat[ch], 0, frame_len*4 * sizeof(real_t));
|
||
|
}
|
||
|
|
||
|
/* long term prediction */
|
||
|
lt_prediction(ics, ltp, spec_coef[ch], lt_pred_stat[ch], fb,
|
||
|
ics->window_shape, window_shape_prev[ch],
|
||
|
sf_index, object_type, frame_len);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* tns decoding */
|
||
|
tns_decode_frame(ics, &(ics->tns), sf_index, object_type,
|
||
|
spec_coef[ch], frame_len);
|
||
|
|
||
|
/* drc decoding */
|
||
|
if (drc->present)
|
||
|
{
|
||
|
if (!drc->exclude_mask[ch] || !drc->excluded_chns_present)
|
||
|
drc_decode(drc, spec_coef[ch]);
|
||
|
}
|
||
|
|
||
|
if (time_out[ch] == NULL)
|
||
|
{
|
||
|
time_out[ch] = (real_t*)malloc(frame_len*2*sizeof(real_t));
|
||
|
memset(time_out[ch], 0, frame_len*2*sizeof(real_t));
|
||
|
}
|
||
|
#ifdef SBR_DEC
|
||
|
if (time_out2[ch] == NULL)
|
||
|
{
|
||
|
time_out2[ch] = (real_t*)malloc(frame_len*2*sizeof(real_t));
|
||
|
memset(time_out2[ch], 0, frame_len*2*sizeof(real_t));
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* filter bank */
|
||
|
#ifdef SSR_DEC
|
||
|
if (object_type != SSR)
|
||
|
{
|
||
|
#endif
|
||
|
ifilter_bank(fb, ics->window_sequence, ics->window_shape,
|
||
|
window_shape_prev[ch], spec_coef[ch],
|
||
|
time_out[ch], object_type, frame_len);
|
||
|
#ifdef SSR_DEC
|
||
|
} else {
|
||
|
if (ssr_overlap[ch] == NULL)
|
||
|
{
|
||
|
ssr_overlap[ch] = (real_t*)malloc(2*frame_len*sizeof(real_t));
|
||
|
memset(ssr_overlap[ch], 0, 2*frame_len*sizeof(real_t));
|
||
|
}
|
||
|
if (prev_fmd[ch] == NULL)
|
||
|
{
|
||
|
uint16_t k;
|
||
|
prev_fmd[ch] = (real_t*)malloc(2*frame_len*sizeof(real_t));
|
||
|
for (k = 0; k < 2*frame_len; k++)
|
||
|
prev_fmd[ch][k] = REAL_CONST(-1);
|
||
|
}
|
||
|
|
||
|
ssr_decode(&(ics->ssr), fb, ics->window_sequence, ics->window_shape,
|
||
|
window_shape_prev[ch], spec_coef[ch], time_out[ch],
|
||
|
ssr_overlap[ch], hDecoder->ipqf_buffer[ch], prev_fmd[ch], frame_len);
|
||
|
}
|
||
|
#endif
|
||
|
/* save window shape for next frame */
|
||
|
window_shape_prev[ch] = ics->window_shape;
|
||
|
|
||
|
#ifdef LTP_DEC
|
||
|
if ((object_type == LTP)
|
||
|
#ifdef ERROR_RESILIENCE
|
||
|
|| (object_type == ER_LTP)
|
||
|
#endif
|
||
|
#ifdef LD_DEC
|
||
|
|| (object_type == LD)
|
||
|
#endif
|
||
|
)
|
||
|
{
|
||
|
lt_update_state(lt_pred_stat[ch], time_out[ch], time_out[ch]+frame_len,
|
||
|
frame_len, object_type);
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
#ifdef SBR_DEC
|
||
|
if (hDecoder->sbr_present_flag == 1)
|
||
|
{
|
||
|
for (i = 0; i < ch_ele; i++)
|
||
|
{
|
||
|
if (syntax_elements[i]->paired_channel != -1)
|
||
|
{
|
||
|
memcpy(time_out2[syntax_elements[i]->channel],
|
||
|
time_out[syntax_elements[i]->channel], frame_len*sizeof(real_t));
|
||
|
memcpy(time_out2[syntax_elements[i]->paired_channel],
|
||
|
time_out[syntax_elements[i]->paired_channel], frame_len*sizeof(real_t));
|
||
|
sbrDecodeFrame(hDecoder->sbr[i],
|
||
|
time_out2[syntax_elements[i]->channel],
|
||
|
time_out2[syntax_elements[i]->paired_channel], ID_CPE,
|
||
|
hDecoder->postSeekResetFlag);
|
||
|
} else {
|
||
|
memcpy(time_out2[syntax_elements[i]->channel],
|
||
|
time_out[syntax_elements[i]->channel], frame_len*sizeof(real_t));
|
||
|
sbrDecodeFrame(hDecoder->sbr[i],
|
||
|
time_out2[syntax_elements[i]->channel],
|
||
|
NULL, ID_SCE,
|
||
|
hDecoder->postSeekResetFlag);
|
||
|
}
|
||
|
}
|
||
|
frame_len *= 2;
|
||
|
hInfo->samples *= 2;
|
||
|
hInfo->samplerate *= 2;
|
||
|
|
||
|
sample_buffer = output_to_PCM(hDecoder, time_out2, sample_buffer,
|
||
|
output_channels, frame_len, outputFormat);
|
||
|
} else {
|
||
|
#endif
|
||
|
sample_buffer = output_to_PCM(hDecoder, time_out, sample_buffer,
|
||
|
output_channels, frame_len, outputFormat);
|
||
|
#ifdef SBR_DEC
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* gapless playback */
|
||
|
if (hDecoder->samplesLeft != 0)
|
||
|
{
|
||
|
hInfo->samples = hDecoder->samplesLeft*channels;
|
||
|
}
|
||
|
hDecoder->samplesLeft = 0;
|
||
|
|
||
|
hDecoder->postSeekResetFlag = 0;
|
||
|
|
||
|
hDecoder->frame++;
|
||
|
#ifdef LD_DEC
|
||
|
if (object_type != LD)
|
||
|
{
|
||
|
#endif
|
||
|
if (hDecoder->frame <= 1)
|
||
|
hInfo->samples = 0;
|
||
|
|
||
|
#if 0
|
||
|
if (hDecoder->frame == 2 && hDecoder->sbr_present_flag == 1)
|
||
|
{
|
||
|
uint8_t samplesize;
|
||
|
switch (outputFormat)
|
||
|
{
|
||
|
case FAAD_FMT_16BIT: case FAAD_FMT_16BIT_DITHER:
|
||
|
case FAAD_FMT_16BIT_L_SHAPE: case FAAD_FMT_16BIT_M_SHAPE:
|
||
|
case FAAD_FMT_16BIT_H_SHAPE:
|
||
|
samplesize = 2;
|
||
|
break;
|
||
|
case FAAD_FMT_24BIT:
|
||
|
case FAAD_FMT_32BIT:
|
||
|
case FAAD_FMT_FLOAT:
|
||
|
samplesize = 4;
|
||
|
break;
|
||
|
case FAAD_FMT_DOUBLE:
|
||
|
samplesize = 8;
|
||
|
break;
|
||
|
}
|
||
|
hInfo->samples = 512*channels;
|
||
|
memmove(sample_buffer, (void*)((char*)sample_buffer + 1536*channels*samplesize), hInfo->samples*samplesize);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#ifdef LD_DEC
|
||
|
} else {
|
||
|
/* LD encoders will give lower delay */
|
||
|
if (hDecoder->frame <= 0)
|
||
|
hInfo->samples = 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* cleanup */
|
||
|
for (ch = 0; ch < channels; ch++)
|
||
|
{
|
||
|
if (spec_coef[ch]) free(spec_coef[ch]);
|
||
|
if (spec_data[ch]) free(spec_data[ch]);
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < ch_ele; i++)
|
||
|
{
|
||
|
if (syntax_elements[i]) free(syntax_elements[i]);
|
||
|
}
|
||
|
|
||
|
#ifdef ANALYSIS
|
||
|
fflush(stdout);
|
||
|
#endif
|
||
|
|
||
|
return sample_buffer;
|
||
|
|
||
|
error:
|
||
|
/* free all memory that could have been allocated */
|
||
|
faad_endbits(ld);
|
||
|
if (ld) free(ld);
|
||
|
|
||
|
/* cleanup */
|
||
|
for (ch = 0; ch < channels; ch++)
|
||
|
{
|
||
|
if (spec_coef[ch]) free(spec_coef[ch]);
|
||
|
if (spec_data[ch]) free(spec_data[ch]);
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < ch_ele; i++)
|
||
|
{
|
||
|
if (syntax_elements[i]) free(syntax_elements[i]);
|
||
|
}
|
||
|
|
||
|
#ifdef ANALYSIS
|
||
|
fflush(stdout);
|
||
|
#endif
|
||
|
|
||
|
return NULL;
|
||
|
}
|