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/*
** FAAD - Freeware Advanced Audio Decoder
** Copyright (C) 2002 M. Bakker
**
** 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.
**
** $Id: mp4.c,v 1.2 2002/08/09 22:36:36 miguelfreitas Exp $
**/
#include "common.h"
#include "bits.h"
#include "mp4.h"
#include "data.h"
#include "syntax.h"
/* defines if an object type can be decoded by this library or not */
static uint8_t ObjectTypesTable[32] = {
0, /* 0 NULL */
#ifdef MAIN_DEC
1, /* 1 AAC Main */
#else
0, /* 1 AAC Main */
#endif
1, /* 2 AAC LC */
0, /* 3 AAC SSR */
#ifdef LTP_DEC
1, /* 4 AAC LTP */
#else
0, /* 4 AAC LTP */
#endif
0, /* 5 Reserved */
0, /* 6 AAC Scalable */
0, /* 7 TwinVQ */
0, /* 8 CELP */
0, /* 9 HVXC */
0, /* 10 Reserved */
0, /* 11 Reserved */
0, /* 12 TTSI */
0, /* 13 Main synthetic */
0, /* 14 Wavetable synthesis */
0, /* 15 General MIDI */
0, /* 16 Algorithmic Synthesis and Audio FX */
/* MPEG-4 Version 2 */
#ifdef ERROR_RESILIENCE
1, /* 17 ER AAC LC */
0, /* 18 (Reserved) */
#ifdef LTP_DEC
1, /* 19 ER AAC LTP */
#else
0, /* 19 ER AAC LTP */
#endif
0, /* 20 ER AAC scalable */
0, /* 21 ER TwinVQ */
0, /* 22 ER BSAC */
#ifdef LD_DEC
1, /* 23 ER AAC LD */
#else
0, /* 23 ER AAC LD */
#endif
0, /* 24 ER CELP */
0, /* 25 ER HVXC */
0, /* 26 ER HILN */
0, /* 27 ER Parametric */
#else /* No ER defined */
0, /* 17 ER AAC LC */
0, /* 18 (Reserved) */
0, /* 19 ER AAC LTP */
0, /* 20 ER AAC scalable */
0, /* 21 ER TwinVQ */
0, /* 22 ER BSAC */
0, /* 23 ER AAC LD */
0, /* 24 ER CELP */
0, /* 25 ER HVXC */
0, /* 26 ER HILN */
0, /* 27 ER Parametric */
#endif
0, /* 28 (Reserved) */
0, /* 29 (Reserved) */
0, /* 30 (Reserved) */
0 /* 31 (Reserved) */
};
/* Table 1.6.1 */
int8_t FAADAPI AudioSpecificConfig(uint8_t *pBuffer,
uint32_t *samplerate,
uint8_t *channels,
uint8_t *sf_index,
uint8_t *object_type,
uint8_t *aacSectionDataResilienceFlag,
uint8_t *aacScalefactorDataResilienceFlag,
uint8_t *aacSpectralDataResilienceFlag,
uint8_t *frameLengthFlag)
{
bitfile ld;
uint8_t ObjectTypeIndex, SamplingFrequencyIndex, ChannelsConfiguration;
faad_initbits(&ld, pBuffer);
faad_byte_align(&ld);
ObjectTypeIndex = (uint8_t)faad_getbits(&ld, 5
DEBUGVAR(1,1,"parse_audio_decoder_specific_info(): ObjectTypeIndex"));
SamplingFrequencyIndex = (uint8_t)faad_getbits(&ld, 4
DEBUGVAR(1,2,"parse_audio_decoder_specific_info(): SamplingFrequencyIndex"));
ChannelsConfiguration = (uint8_t)faad_getbits(&ld, 4
DEBUGVAR(1,3,"parse_audio_decoder_specific_info(): ChannelsConfiguration"));
*samplerate = sample_rates[SamplingFrequencyIndex];
*channels = ChannelsConfiguration;
*sf_index = SamplingFrequencyIndex;
*object_type = ObjectTypeIndex;
if (ObjectTypesTable[ObjectTypeIndex] != 1)
{
return -1;
}
if (*samplerate == 0)
{
return -2;
}
if (ChannelsConfiguration > 7)
{
return -3;
}
/* get GASpecificConfig */
if (ObjectTypeIndex == 1 || ObjectTypeIndex == 2 ||
ObjectTypeIndex == 3 || ObjectTypeIndex == 4 ||
ObjectTypeIndex == 6 || ObjectTypeIndex == 7)
{
return GASpecificConfig(&ld, channels, ObjectTypeIndex,
aacSectionDataResilienceFlag,
aacScalefactorDataResilienceFlag,
aacSpectralDataResilienceFlag,
frameLengthFlag);
#ifdef ERROR_RESILIENCE
} else if (ObjectTypeIndex >= ER_OBJECT_START) { /* ER */
int8_t result = GASpecificConfig(&ld, channels, ObjectTypeIndex,
aacSectionDataResilienceFlag,
aacScalefactorDataResilienceFlag,
aacSpectralDataResilienceFlag,
frameLengthFlag);
uint8_t ep_config = (uint8_t)faad_getbits(&ld, 2
DEBUGVAR(1,143,"parse_audio_decoder_specific_info(): epConfig"));
if (ep_config != 0)
return -5;
return result;
#endif
} else {
return -4;
}
return 0;
}
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