Coverage Report

Created: 2025-07-23 06:30

/proc/self/cwd/libfaad/mp4.c
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Source (jump to first uncovered line)
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/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003-2005 M. Bakker, Nero 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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** The "appropriate copyright message" mentioned in section 2c of the GPLv2
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** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
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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 Nero AG through Mpeg4AAClicense@nero.com.
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**
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** $Id: mp4.c,v 1.41 2016/11/11 11:25:58 knik 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 "mp4.h"
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#include "syntax.h"
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/* defines if an object type can be decoded by this library or not */
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static uint8_t ObjectTypesTable[32] = {
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    0, /*  0 NULL */
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#ifdef MAIN_DEC
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    1, /*  1 AAC Main */
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#else
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    0, /*  1 AAC Main */
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#endif
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    1, /*  2 AAC LC */
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#ifdef SSR_DEC
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    1, /*  3 AAC SSR */
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#else
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    0, /*  3 AAC SSR */
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#endif
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#ifdef LTP_DEC
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    1, /*  4 AAC LTP */
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#else
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    0, /*  4 AAC LTP */
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#endif
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#ifdef SBR_DEC
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    1, /*  5 SBR */
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#else
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    0, /*  5 SBR */
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#endif
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    0, /*  6 AAC Scalable */
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    0, /*  7 TwinVQ */
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    0, /*  8 CELP */
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    0, /*  9 HVXC */
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    0, /* 10 Reserved */
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    0, /* 11 Reserved */
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    0, /* 12 TTSI */
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    0, /* 13 Main synthetic */
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    0, /* 14 Wavetable synthesis */
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    0, /* 15 General MIDI */
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    0, /* 16 Algorithmic Synthesis and Audio FX */
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    /* MPEG-4 Version 2 */
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#ifdef ERROR_RESILIENCE
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    1, /* 17 ER AAC LC */
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    0, /* 18 (Reserved) */
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#ifdef LTP_DEC
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    1, /* 19 ER AAC LTP */
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#else
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    0, /* 19 ER AAC LTP */
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#endif
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    0, /* 20 ER AAC scalable */
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    0, /* 21 ER TwinVQ */
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    0, /* 22 ER BSAC */
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#ifdef LD_DEC
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    1, /* 23 ER AAC LD */
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#else
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    0, /* 23 ER AAC LD */
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#endif
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    0, /* 24 ER CELP */
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    0, /* 25 ER HVXC */
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    0, /* 26 ER HILN */
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    0, /* 27 ER Parametric */
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#else /* No ER defined */
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    0, /* 17 ER AAC LC */
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    0, /* 18 (Reserved) */
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    0, /* 19 ER AAC LTP */
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    0, /* 20 ER AAC scalable */
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    0, /* 21 ER TwinVQ */
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    0, /* 22 ER BSAC */
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    0, /* 23 ER AAC LD */
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    0, /* 24 ER CELP */
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    0, /* 25 ER HVXC */
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    0, /* 26 ER HILN */
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    0, /* 27 ER Parametric */
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#endif
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    0, /* 28 (Reserved) */
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#ifdef PS_DEC
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    1, /* 29 AAC LC + SBR + PS */
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#else
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    0, /* 29 AAC LC + SBR + PS */
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#endif
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    0, /* 30 (Reserved) */
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    0  /* 31 (Reserved) */
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};
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/* Table 1.6.1 */
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char NeAACDecAudioSpecificConfig(unsigned char *pBuffer,
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                                             unsigned long buffer_size,
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                                             mp4AudioSpecificConfig *mp4ASC)
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{
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    return AudioSpecificConfig2(pBuffer, buffer_size, mp4ASC, NULL, 0);
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324
}
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int8_t AudioSpecificConfigFromBitfile(bitfile *ld,
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                            mp4AudioSpecificConfig *mp4ASC,
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                            program_config *pce, uint32_t buffer_size, uint8_t short_form)
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8.61k
{
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8.61k
    int8_t result = 0;
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8.61k
    uint32_t startpos = faad_get_processed_bits(ld);
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8.61k
#ifdef SBR_DEC
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8.61k
    int8_t bits_to_decode = 0;
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8.61k
#endif
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8.61k
    if (mp4ASC == NULL)
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0
        return -8;
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8.61k
    memset(mp4ASC, 0, sizeof(mp4AudioSpecificConfig));
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8.61k
    mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(ld, 5
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8.61k
        DEBUGVAR(1,1,"parse_audio_decoder_specific_info(): ObjectTypeIndex"));
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8.61k
    mp4ASC->samplingFrequencyIndex = (uint8_t)faad_getbits(ld, 4
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8.61k
        DEBUGVAR(1,2,"parse_audio_decoder_specific_info(): SamplingFrequencyIndex"));
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8.61k
  if(mp4ASC->samplingFrequencyIndex==0x0f)
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9
    faad_getbits(ld, 24);
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8.61k
    mp4ASC->channelsConfiguration = (uint8_t)faad_getbits(ld, 4
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8.61k
        DEBUGVAR(1,3,"parse_audio_decoder_specific_info(): ChannelsConfiguration"));
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8.61k
    mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
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8.61k
    if (ObjectTypesTable[mp4ASC->objectTypeIndex] != 1)
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    {
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        return -1;
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    }
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8.57k
    if (mp4ASC->samplingFrequency == 0)
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    {
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        return -2;
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9
    }
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8.56k
    if (mp4ASC->channelsConfiguration > 7)
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11
    {
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11
        return -3;
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11
    }
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8.55k
#if (defined(PS_DEC) || defined(DRM_PS))
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    /* check if we have a mono file */
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8.55k
    if (mp4ASC->channelsConfiguration == 1)
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721
    {
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        /* upMatrix to 2 channels for implicit signalling of PS */
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721
        mp4ASC->channelsConfiguration = 2;
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721
    }
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8.55k
#endif
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8.55k
#ifdef SBR_DEC
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8.55k
    mp4ASC->sbr_present_flag = -1;
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8.55k
    if (mp4ASC->objectTypeIndex == 5 || mp4ASC->objectTypeIndex == 29)
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1.81k
    {
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1.81k
        uint8_t tmp;
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1.81k
        mp4ASC->sbr_present_flag = 1;
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1.81k
        tmp = (uint8_t)faad_getbits(ld, 4
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1.81k
            DEBUGVAR(1,5,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
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        /* check for downsampled SBR */
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1.81k
        if (tmp == mp4ASC->samplingFrequencyIndex)
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360
            mp4ASC->downSampledSBR = 1;
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1.81k
        mp4ASC->samplingFrequencyIndex = tmp;
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1.81k
        if (mp4ASC->samplingFrequencyIndex == 15)
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        {
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            mp4ASC->samplingFrequency = (uint32_t)faad_getbits(ld, 24
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                DEBUGVAR(1,6,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
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1.73k
        } else {
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1.73k
            mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
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1.73k
        }
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1.81k
        mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(ld, 5
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1.81k
            DEBUGVAR(1,7,"parse_audio_decoder_specific_info(): ObjectTypeIndex"));
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1.81k
    }
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8.55k
#endif
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    /* get GASpecificConfig */
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8.55k
    if (mp4ASC->objectTypeIndex == 1 || mp4ASC->objectTypeIndex == 2 ||
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8.55k
        mp4ASC->objectTypeIndex == 3 || mp4ASC->objectTypeIndex == 4 ||
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8.55k
        mp4ASC->objectTypeIndex == 6 || mp4ASC->objectTypeIndex == 7)
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2.39k
    {
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2.39k
        result = GASpecificConfig(ld, mp4ASC, pce);
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2.39k
#ifdef ERROR_RESILIENCE
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6.15k
    } else if (mp4ASC->objectTypeIndex >= ER_OBJECT_START) { /* ER */
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6.09k
        result = GASpecificConfig(ld, mp4ASC, pce);
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6.09k
        mp4ASC->epConfig = (uint8_t)faad_getbits(ld, 2
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6.09k
            DEBUGVAR(1,143,"parse_audio_decoder_specific_info(): epConfig"));
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6.09k
        if (mp4ASC->epConfig != 0)
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            result = -5;
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6.09k
#endif
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6.09k
    } else {
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        result = -4;
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    }
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#ifdef SSR_DEC
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    /* shorter frames not allowed for SSR */
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    if ((mp4ASC->objectTypeIndex == 4) && mp4ASC->frameLengthFlag)
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        return -6;
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#endif
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8.55k
#ifdef SBR_DEC
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8.55k
    if(short_form)
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0
        bits_to_decode = 0;
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8.55k
    else
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8.55k
    bits_to_decode = (int8_t)(buffer_size*8 + faad_get_processed_bits(ld) - startpos);
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8.55k
    if ((mp4ASC->objectTypeIndex != 5 && mp4ASC->objectTypeIndex != 29) && (bits_to_decode >= 16))
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7.49k
    {
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7.49k
        int16_t syncExtensionType = (int16_t)faad_getbits(ld, 11
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7.49k
            DEBUGVAR(1,9,"parse_audio_decoder_specific_info(): syncExtensionType"));
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7.49k
        if (syncExtensionType == 0x2b7)
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384
        {
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384
            uint8_t tmp_OTi = (uint8_t)faad_getbits(ld, 5
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                DEBUGVAR(1,10,"parse_audio_decoder_specific_info(): extensionAudioObjectType"));
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384
            if (tmp_OTi == 5)
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369
            {
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                mp4ASC->sbr_present_flag = (uint8_t)faad_get1bit(ld
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369
                    DEBUGVAR(1,11,"parse_audio_decoder_specific_info(): sbr_present_flag"));
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369
                if (mp4ASC->sbr_present_flag)
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                {
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                    uint8_t tmp;
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          /* Don't set OT to SBR until checked that it is actually there */
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          mp4ASC->objectTypeIndex = tmp_OTi;
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                    tmp = (uint8_t)faad_getbits(ld, 4
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                        DEBUGVAR(1,12,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
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                    /* check for downsampled SBR */
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358
                    if (tmp == mp4ASC->samplingFrequencyIndex)
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41
                        mp4ASC->downSampledSBR = 1;
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358
                    mp4ASC->samplingFrequencyIndex = tmp;
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358
                    if (mp4ASC->samplingFrequencyIndex == 15)
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18
                    {
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18
                        mp4ASC->samplingFrequency = (uint32_t)faad_getbits(ld, 24
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                            DEBUGVAR(1,13,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
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                    } else {
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                        mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
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340
                    }
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                }
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369
            }
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384
        }
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7.49k
    }
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    /* no SBR signalled, this could mean either implicit signalling or no SBR in this file */
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    /* MPEG specification states: assume SBR on files with samplerate <= 24000 Hz */
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8.55k
    if (mp4ASC->sbr_present_flag == (char)-1) /* cannot be -1 on systems with unsigned char */
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6.47k
    {
284
6.47k
        if (mp4ASC->samplingFrequency <= 24000)
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3.87k
        {
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3.87k
            mp4ASC->samplingFrequency *= 2;
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3.87k
            mp4ASC->forceUpSampling = 1;
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3.87k
        } else /* > 24000*/ {
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2.59k
            mp4ASC->downSampledSBR = 1;
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2.59k
        }
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6.47k
    }
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8.55k
#endif
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8.55k
    faad_endbits(ld);
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296
8.55k
    return result;
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8.56k
}
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int8_t AudioSpecificConfig2(uint8_t *pBuffer,
300
                            uint32_t buffer_size,
301
                            mp4AudioSpecificConfig *mp4ASC,
302
                            program_config *pce,
303
                            uint8_t short_form)
304
8.62k
{
305
8.62k
    uint8_t ret = 0;
306
8.62k
    bitfile ld;
307
8.62k
    faad_initbits(&ld, pBuffer, buffer_size);
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8.62k
    if (ld.error != 0)
309
15
        return -7;
310
8.61k
    ret = AudioSpecificConfigFromBitfile(&ld, mp4ASC, pce, buffer_size, short_form);
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8.61k
    faad_endbits(&ld);
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8.61k
    return ret;
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8.62k
}