mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 01:22:30 +00:00
82361d50d0
Patch by me and Emanuele Giaquinta git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18142 b3059339-0415-0410-9bf9-f77b7e298cf2
300 lines
8.8 KiB
C
300 lines
8.8 KiB
C
/*
|
|
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
|
|
** Copyright (C) 2003-2004 M. Bakker, Ahead Software 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.
|
|
**
|
|
** Commercial non-GPL licensing of this software is possible.
|
|
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
|
|
**
|
|
** $Id: mp4.c,v 1.32 2004/09/04 14:56:28 menno Exp $
|
|
**/
|
|
|
|
#include "common.h"
|
|
#include "structs.h"
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "bits.h"
|
|
#include "mp4.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 */
|
|
#ifdef SSR_DEC
|
|
1, /* 3 AAC SSR */
|
|
#else
|
|
0, /* 3 AAC SSR */
|
|
#endif
|
|
#ifdef LTP_DEC
|
|
1, /* 4 AAC LTP */
|
|
#else
|
|
0, /* 4 AAC LTP */
|
|
#endif
|
|
#ifdef SBR_DEC
|
|
1, /* 5 SBR */
|
|
#else
|
|
0, /* 5 SBR */
|
|
#endif
|
|
#ifdef SCALABLE_DEC
|
|
1, /* 6 AAC Scalable */
|
|
#else
|
|
0, /* 6 AAC Scalable */
|
|
#endif
|
|
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
|
|
#ifdef SCALABLE_DEC
|
|
1, /* 20 ER AAC scalable */
|
|
#else
|
|
0, /* 20 ER AAC scalable */
|
|
#endif
|
|
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 NEAACDECAPI NeAACDecAudioSpecificConfig(uint8_t *pBuffer,
|
|
uint32_t buffer_size,
|
|
mp4AudioSpecificConfig *mp4ASC)
|
|
{
|
|
return AudioSpecificConfig2(pBuffer, buffer_size, mp4ASC, NULL);
|
|
}
|
|
|
|
int8_t AudioSpecificConfig2(uint8_t *pBuffer,
|
|
uint32_t buffer_size,
|
|
mp4AudioSpecificConfig *mp4ASC,
|
|
program_config *pce)
|
|
{
|
|
bitfile ld;
|
|
int8_t result = 0;
|
|
#ifdef SBR_DEC
|
|
int8_t bits_to_decode = 0;
|
|
#endif
|
|
|
|
if (pBuffer == NULL)
|
|
return -7;
|
|
if (mp4ASC == NULL)
|
|
return -8;
|
|
|
|
memset(mp4ASC, 0, sizeof(mp4AudioSpecificConfig));
|
|
|
|
faad_initbits(&ld, pBuffer, buffer_size);
|
|
faad_byte_align(&ld);
|
|
|
|
mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(&ld, 5
|
|
DEBUGVAR(1,1,"parse_audio_decoder_specific_info(): ObjectTypeIndex"));
|
|
|
|
mp4ASC->samplingFrequencyIndex = (uint8_t)faad_getbits(&ld, 4
|
|
DEBUGVAR(1,2,"parse_audio_decoder_specific_info(): SamplingFrequencyIndex"));
|
|
|
|
mp4ASC->channelsConfiguration = (uint8_t)faad_getbits(&ld, 4
|
|
DEBUGVAR(1,3,"parse_audio_decoder_specific_info(): ChannelsConfiguration"));
|
|
|
|
mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
|
|
|
|
if (ObjectTypesTable[mp4ASC->objectTypeIndex] != 1)
|
|
{
|
|
faad_endbits(&ld);
|
|
return -1;
|
|
}
|
|
|
|
if (mp4ASC->samplingFrequency == 0)
|
|
{
|
|
faad_endbits(&ld);
|
|
return -2;
|
|
}
|
|
|
|
if (mp4ASC->channelsConfiguration > 7)
|
|
{
|
|
faad_endbits(&ld);
|
|
return -3;
|
|
}
|
|
|
|
#if (defined(PS_DEC) || defined(DRM_PS))
|
|
/* check if we have a mono file */
|
|
if (mp4ASC->channelsConfiguration == 1)
|
|
{
|
|
/* upMatrix to 2 channels for implicit signalling of PS */
|
|
mp4ASC->channelsConfiguration = 2;
|
|
}
|
|
#endif
|
|
|
|
#ifdef SBR_DEC
|
|
mp4ASC->sbr_present_flag = -1;
|
|
if (mp4ASC->objectTypeIndex == 5)
|
|
{
|
|
uint8_t tmp;
|
|
|
|
mp4ASC->sbr_present_flag = 1;
|
|
tmp = (uint8_t)faad_getbits(&ld, 4
|
|
DEBUGVAR(1,5,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
|
|
/* check for downsampled SBR */
|
|
if (tmp == mp4ASC->samplingFrequencyIndex)
|
|
mp4ASC->downSampledSBR = 1;
|
|
mp4ASC->samplingFrequencyIndex = tmp;
|
|
if (mp4ASC->samplingFrequencyIndex == 15)
|
|
{
|
|
mp4ASC->samplingFrequency = (uint32_t)faad_getbits(&ld, 24
|
|
DEBUGVAR(1,6,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
|
|
} else {
|
|
mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
|
|
}
|
|
mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(&ld, 5
|
|
DEBUGVAR(1,7,"parse_audio_decoder_specific_info(): ObjectTypeIndex"));
|
|
}
|
|
#endif
|
|
|
|
/* get GASpecificConfig */
|
|
if (mp4ASC->objectTypeIndex == 1 || mp4ASC->objectTypeIndex == 2 ||
|
|
mp4ASC->objectTypeIndex == 3 || mp4ASC->objectTypeIndex == 4 ||
|
|
mp4ASC->objectTypeIndex == 6 || mp4ASC->objectTypeIndex == 7)
|
|
{
|
|
result = GASpecificConfig(&ld, mp4ASC, pce);
|
|
|
|
#ifdef ERROR_RESILIENCE
|
|
} else if (mp4ASC->objectTypeIndex >= ER_OBJECT_START) { /* ER */
|
|
result = GASpecificConfig(&ld, mp4ASC, pce);
|
|
mp4ASC->epConfig = (uint8_t)faad_getbits(&ld, 2
|
|
DEBUGVAR(1,143,"parse_audio_decoder_specific_info(): epConfig"));
|
|
|
|
if (mp4ASC->epConfig != 0)
|
|
result = -5;
|
|
#endif
|
|
|
|
} else {
|
|
result = -4;
|
|
}
|
|
|
|
#ifdef SSR_DEC
|
|
/* shorter frames not allowed for SSR */
|
|
if ((mp4ASC->objectTypeIndex == 4) && mp4ASC->frameLengthFlag)
|
|
return -6;
|
|
#endif
|
|
|
|
|
|
#ifdef SBR_DEC
|
|
bits_to_decode = (int8_t)(buffer_size*8 - faad_get_processed_bits(&ld));
|
|
|
|
if ((mp4ASC->objectTypeIndex != 5) && (bits_to_decode >= 16))
|
|
{
|
|
int16_t syncExtensionType = (int16_t)faad_getbits(&ld, 11
|
|
DEBUGVAR(1,9,"parse_audio_decoder_specific_info(): syncExtensionType"));
|
|
|
|
if (syncExtensionType == 0x2b7)
|
|
{
|
|
mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(&ld, 5
|
|
DEBUGVAR(1,10,"parse_audio_decoder_specific_info(): extensionAudioObjectType"));
|
|
|
|
if (mp4ASC->objectTypeIndex == 5)
|
|
{
|
|
mp4ASC->sbr_present_flag = (uint8_t)faad_get1bit(&ld
|
|
DEBUGVAR(1,11,"parse_audio_decoder_specific_info(): sbr_present_flag"));
|
|
|
|
if (mp4ASC->sbr_present_flag)
|
|
{
|
|
uint8_t tmp;
|
|
tmp = (uint8_t)faad_getbits(&ld, 4
|
|
DEBUGVAR(1,12,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
|
|
|
|
/* check for downsampled SBR */
|
|
if (tmp == mp4ASC->samplingFrequencyIndex)
|
|
mp4ASC->downSampledSBR = 1;
|
|
mp4ASC->samplingFrequencyIndex = tmp;
|
|
|
|
if (mp4ASC->samplingFrequencyIndex == 15)
|
|
{
|
|
mp4ASC->samplingFrequency = (uint32_t)faad_getbits(&ld, 24
|
|
DEBUGVAR(1,13,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
|
|
} else {
|
|
mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* no SBR signalled, this could mean either implicit signalling or no SBR in this file */
|
|
/* MPEG specification states: assume SBR on files with samplerate <= 24000 Hz */
|
|
if (mp4ASC->sbr_present_flag == -1)
|
|
{
|
|
if (mp4ASC->samplingFrequency <= 24000)
|
|
{
|
|
mp4ASC->samplingFrequency *= 2;
|
|
mp4ASC->forceUpSampling = 1;
|
|
} else /* > 24000*/ {
|
|
mp4ASC->downSampledSBR = 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
faad_endbits(&ld);
|
|
|
|
return result;
|
|
}
|