/proc/self/cwd/libfaad/mp4.c

Source
/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2005 M. Bakker, Nero 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.
**
** The "appropriate copyright message" mentioned in section 2c of the GPLv2
** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
**
** $Id: mp4.c,v 1.41 2016/11/11 11:25:58 knik Exp $
**/

#include "common.h"
#include "structs.h"

#include <stdlib.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
    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) */
#ifdef PS_DEC
    1, /* 29 AAC LC + SBR + PS */
#else
    0, /* 29 AAC LC + SBR + PS */
#endif
    0, /* 30 (Reserved) */
    0  /* 31 (Reserved) */
};

/* Table 1.6.1 */
char NeAACDecAudioSpecificConfig(unsigned char *pBuffer,
                                             unsigned long buffer_size,
                                             mp4AudioSpecificConfig *mp4ASC)
{
    return AudioSpecificConfig2(pBuffer, buffer_size, mp4ASC, NULL, 0);
}

int8_t AudioSpecificConfigFromBitfile(bitfile *ld,
                            mp4AudioSpecificConfig *mp4ASC,
                            program_config *pce, uint32_t buffer_size, uint8_t short_form)
{
    int8_t result = 0;
#ifdef SBR_DEC
    uint32_t startpos = faad_get_processed_bits(ld);
    int32_t bits_to_decode = 0;
#endif

    if (mp4ASC == NULL)
        return -8;

    memset(mp4ASC, 0, sizeof(mp4AudioSpecificConfig));

    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"));
  if(mp4ASC->samplingFrequencyIndex==0x0f)
    faad_getbits(ld, 24);

    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)
    {
        return -1;
    }

    if (mp4ASC->samplingFrequency == 0)
    {
        return -2;
    }

    if (mp4ASC->channelsConfiguration > 7)
    {
        return -3;
    }

#ifdef SBR_DEC
    mp4ASC->sbr_present_flag = -1;
    mp4ASC->ps_present_flag = -1;
    if (mp4ASC->objectTypeIndex == 5 || mp4ASC->objectTypeIndex == 29)
    {
        uint8_t tmp;

        mp4ASC->sbr_present_flag = 1;
        if (mp4ASC->objectTypeIndex == 29)
            mp4ASC->ps_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
    if(short_form)
        bits_to_decode = 0;
    else
    bits_to_decode = (int32_t)(buffer_size*8 - (faad_get_processed_bits(ld) - startpos));

    if ((mp4ASC->objectTypeIndex != 5 && mp4ASC->objectTypeIndex != 29) && (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)
        {
            uint8_t tmp_OTi = (uint8_t)faad_getbits(ld, 5
                DEBUGVAR(1,10,"parse_audio_decoder_specific_info(): extensionAudioObjectType"));

            if (tmp_OTi == 5 || tmp_OTi == 29)
            {
                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;

          /* Don't set OT to SBR until checked that it is actually there.
           * PS is carried by ps_present_flag: an object type >= 17
           * would send the LC core down the ER syntax path. */
          mp4ASC->objectTypeIndex = HE_AAC;

                    if (tmp_OTi == 29)
                        mp4ASC->ps_present_flag = 1;

                    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);
                    }

                    bits_to_decode = (int32_t)(buffer_size*8 - (faad_get_processed_bits(ld) - startpos));
                    if (bits_to_decode >= 12)
                    {
                        syncExtensionType = (int16_t)faad_getbits(ld, 11
                            DEBUGVAR(1,14,"parse_audio_decoder_specific_info(): syncExtensionType"));
                        if (syncExtensionType == 0x548)
                        {
                            mp4ASC->ps_present_flag = (uint8_t)faad_get1bit(ld
                                DEBUGVAR(1,15,"parse_audio_decoder_specific_info(): ps_present_flag"));
                        }
                    }
                }
            }
        }
    }

    /* 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 == (char)-1) /* cannot be -1 on systems with unsigned char */
    {
        if (mp4ASC->samplingFrequency <= 24000)
        {
            mp4ASC->samplingFrequency *= 2;
            mp4ASC->forceUpSampling = 1;
        } else /* > 24000*/ {
            mp4ASC->downSampledSBR = 1;
        }
    }
#endif

    faad_endbits(ld);

    return result;
}

int8_t AudioSpecificConfig2(uint8_t *pBuffer,
                            uint32_t buffer_size,
                            mp4AudioSpecificConfig *mp4ASC,
                            program_config *pce,
                            uint8_t short_form)
{
    uint8_t ret = 0;
    bitfile ld;
    faad_initbits(&ld, pBuffer, buffer_size);
    if (ld.error != 0)
        return -7;
    ret = AudioSpecificConfigFromBitfile(&ld, mp4ASC, pce, buffer_size, short_form);
    faad_endbits(&ld);
    return ret;
}

Coverage Report

Created: 2026-10-17 06:34

Line	Count	Source
1		/*
2		** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
3		** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
4		**
5		** This program is free software; you can redistribute it and/or modify
6		** it under the terms of the GNU General Public License as published by
7		** the Free Software Foundation; either version 2 of the License, or
8		** (at your option) any later version.
9		**
10		** This program is distributed in the hope that it will be useful,
11		** but WITHOUT ANY WARRANTY; without even the implied warranty of
12		** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13		** GNU General Public License for more details.
14		**
15		** You should have received a copy of the GNU General Public License
16		** along with this program; if not, write to the Free Software
17		** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18		**
19		** Any non-GPL usage of this software or parts of this software is strictly
20		** forbidden.
21		**
22		** The "appropriate copyright message" mentioned in section 2c of the GPLv2
23		** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
24		**
25		** Commercial non-GPL licensing of this software is possible.
26		** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
27		**
28		** $Id: mp4.c,v 1.41 2016/11/11 11:25:58 knik Exp $
29		**/
30
31		#include "common.h"
32		#include "structs.h"
33
34		#include <stdlib.h>
35
36		#include "mp4.h"
37		#include "syntax.h"
38
39		/* defines if an object type can be decoded by this library or not */
40		static uint8_t ObjectTypesTable[32] = {
41		0, /* 0 NULL */
42		#ifdef MAIN_DEC
43		1, /* 1 AAC Main */
44		#else
45		0, /* 1 AAC Main */
46		#endif
47		1, /* 2 AAC LC */
48		#ifdef SSR_DEC
49		1, /* 3 AAC SSR */
50		#else
51		0, /* 3 AAC SSR */
52		#endif
53		#ifdef LTP_DEC
54		1, /* 4 AAC LTP */
55		#else
56		0, /* 4 AAC LTP */
57		#endif
58		#ifdef SBR_DEC
59		1, /* 5 SBR */
60		#else
61		0, /* 5 SBR */
62		#endif
63		0, /* 6 AAC Scalable */
64		0, /* 7 TwinVQ */
65		0, /* 8 CELP */
66		0, /* 9 HVXC */
67		0, /* 10 Reserved */
68		0, /* 11 Reserved */
69		0, /* 12 TTSI */
70		0, /* 13 Main synthetic */
71		0, /* 14 Wavetable synthesis */
72		0, /* 15 General MIDI */
73		0, /* 16 Algorithmic Synthesis and Audio FX */
74
75		/* MPEG-4 Version 2 */
76		#ifdef ERROR_RESILIENCE
77		1, /* 17 ER AAC LC */
78		0, /* 18 (Reserved) */
79		#ifdef LTP_DEC
80		1, /* 19 ER AAC LTP */
81		#else
82		0, /* 19 ER AAC LTP */
83		#endif
84		0, /* 20 ER AAC scalable */
85		0, /* 21 ER TwinVQ */
86		0, /* 22 ER BSAC */
87		#ifdef LD_DEC
88		1, /* 23 ER AAC LD */
89		#else
90		0, /* 23 ER AAC LD */
91		#endif
92		0, /* 24 ER CELP */
93		0, /* 25 ER HVXC */
94		0, /* 26 ER HILN */
95		0, /* 27 ER Parametric */
96		#else /* No ER defined */
97		0, /* 17 ER AAC LC */
98		0, /* 18 (Reserved) */
99		0, /* 19 ER AAC LTP */
100		0, /* 20 ER AAC scalable */
101		0, /* 21 ER TwinVQ */
102		0, /* 22 ER BSAC */
103		0, /* 23 ER AAC LD */
104		0, /* 24 ER CELP */
105		0, /* 25 ER HVXC */
106		0, /* 26 ER HILN */
107		0, /* 27 ER Parametric */
108		#endif
109		0, /* 28 (Reserved) */
110		#ifdef PS_DEC
111		1, /* 29 AAC LC + SBR + PS */
112		#else
113		0, /* 29 AAC LC + SBR + PS */
114		#endif
115		0, /* 30 (Reserved) */
116		0 /* 31 (Reserved) */
117		};
118
119		/* Table 1.6.1 */
120		char NeAACDecAudioSpecificConfig(unsigned char *pBuffer,
121		unsigned long buffer_size,
122		mp4AudioSpecificConfig *mp4ASC)
123	372	{
124	372	return AudioSpecificConfig2(pBuffer, buffer_size, mp4ASC, NULL, 0);
125	372	}
126
127		int8_t AudioSpecificConfigFromBitfile(bitfile *ld,
128		mp4AudioSpecificConfig *mp4ASC,
129		program_config *pce, uint32_t buffer_size, uint8_t short_form)
130	359	{
131	359	int8_t result = 0;
132	359	#ifdef SBR_DEC
133	359	uint32_t startpos = faad_get_processed_bits(ld);
134	359	int32_t bits_to_decode = 0;
135	359	#endif
136
137	359	if (mp4ASC == NULL)
138	0	return -8;
139
140	359	memset(mp4ASC, 0, sizeof(mp4AudioSpecificConfig));
141
142	359	mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(ld, 5
143	359	DEBUGVAR(1,1,"parse_audio_decoder_specific_info(): ObjectTypeIndex"));
144
145	359	mp4ASC->samplingFrequencyIndex = (uint8_t)faad_getbits(ld, 4
146	359	DEBUGVAR(1,2,"parse_audio_decoder_specific_info(): SamplingFrequencyIndex"));
147	359	if(mp4ASC->samplingFrequencyIndex==0x0f)
148	4	faad_getbits(ld, 24);
149
150	359	mp4ASC->channelsConfiguration = (uint8_t)faad_getbits(ld, 4
151	359	DEBUGVAR(1,3,"parse_audio_decoder_specific_info(): ChannelsConfiguration"));
152
153	359	mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
154
155	359	if (ObjectTypesTable[mp4ASC->objectTypeIndex] != 1)
156	15	{
157	15	return -1;
158	15	}
159
160	344	if (mp4ASC->samplingFrequency == 0)
161	1	{
162	1	return -2;
163	1	}
164
165	343	if (mp4ASC->channelsConfiguration > 7)
166	2	{
167	2	return -3;
168	2	}
169
170	341	#ifdef SBR_DEC
171	341	mp4ASC->sbr_present_flag = -1;
172	341	mp4ASC->ps_present_flag = -1;
173	341	if (mp4ASC->objectTypeIndex == 5 \|\| mp4ASC->objectTypeIndex == 29)
174	117	{
175	117	uint8_t tmp;
176
177	117	mp4ASC->sbr_present_flag = 1;
178	117	if (mp4ASC->objectTypeIndex == 29)
179	15	mp4ASC->ps_present_flag = 1;
180
181	117	tmp = (uint8_t)faad_getbits(ld, 4
182	117	DEBUGVAR(1,5,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
183		/* check for downsampled SBR */
184	117	if (tmp == mp4ASC->samplingFrequencyIndex)
185	4	mp4ASC->downSampledSBR = 1;
186	117	mp4ASC->samplingFrequencyIndex = tmp;
187	117	if (mp4ASC->samplingFrequencyIndex == 15)
188	10	{
189	10	mp4ASC->samplingFrequency = (uint32_t)faad_getbits(ld, 24
190	10	DEBUGVAR(1,6,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
191	107	} else {
192	107	mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
193	107	}
194	117	mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(ld, 5
195	117	DEBUGVAR(1,7,"parse_audio_decoder_specific_info(): ObjectTypeIndex"));
196	117	}
197	341	#endif
198
199		/* get GASpecificConfig */
200	341	if (mp4ASC->objectTypeIndex == 1 \|\| mp4ASC->objectTypeIndex == 2 \|\|
201	217	mp4ASC->objectTypeIndex == 3 \|\| mp4ASC->objectTypeIndex == 4 \|\|
202	156	mp4ASC->objectTypeIndex == 6 \|\| mp4ASC->objectTypeIndex == 7)
203	191	{
204	191	result = GASpecificConfig(ld, mp4ASC, pce);
205
206	191	#ifdef ERROR_RESILIENCE
207	191	} else if (mp4ASC->objectTypeIndex >= ER_OBJECT_START) { /* ER */
208	119	result = GASpecificConfig(ld, mp4ASC, pce);
209	119	mp4ASC->epConfig = (uint8_t)faad_getbits(ld, 2
210	119	DEBUGVAR(1,143,"parse_audio_decoder_specific_info(): epConfig"));
211
212	119	if (mp4ASC->epConfig != 0)
213	55	result = -5;
214	119	#endif
215
216	119	} else {
217	31	result = -4;
218	31	}
219
220		#ifdef SSR_DEC
221		/* shorter frames not allowed for SSR */
222		if ((mp4ASC->objectTypeIndex == 4) && mp4ASC->frameLengthFlag)
223		return -6;
224		#endif
225
226
227	341	#ifdef SBR_DEC
228	341	if(short_form)
229	0	bits_to_decode = 0;
230	341	else
231	341	bits_to_decode = (int32_t)(buffer_size*8 - (faad_get_processed_bits(ld) - startpos));
232
233	341	if ((mp4ASC->objectTypeIndex != 5 && mp4ASC->objectTypeIndex != 29) && (bits_to_decode >= 16))
234	162	{
235	162	int16_t syncExtensionType = (int16_t)faad_getbits(ld, 11
236	162	DEBUGVAR(1,9,"parse_audio_decoder_specific_info(): syncExtensionType"));
237
238	162	if (syncExtensionType == 0x2b7)
239	98	{
240	98	uint8_t tmp_OTi = (uint8_t)faad_getbits(ld, 5
241	98	DEBUGVAR(1,10,"parse_audio_decoder_specific_info(): extensionAudioObjectType"));
242
243	98	if (tmp_OTi == 5 \|\| tmp_OTi == 29)
244	88	{
245	88	mp4ASC->sbr_present_flag = (uint8_t)faad_get1bit(ld
246	88	DEBUGVAR(1,11,"parse_audio_decoder_specific_info(): sbr_present_flag"));
247
248	88	if (mp4ASC->sbr_present_flag)
249	86	{
250	86	uint8_t tmp;
251
252		/* Don't set OT to SBR until checked that it is actually there.
253		* PS is carried by ps_present_flag: an object type >= 17
254		* would send the LC core down the ER syntax path. */
255	86	mp4ASC->objectTypeIndex = HE_AAC;
256
257	86	if (tmp_OTi == 29)
258	13	mp4ASC->ps_present_flag = 1;
259
260	86	tmp = (uint8_t)faad_getbits(ld, 4
261	86	DEBUGVAR(1,12,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
262
263		/* check for downsampled SBR */
264	86	if (tmp == mp4ASC->samplingFrequencyIndex)
265	6	mp4ASC->downSampledSBR = 1;
266	86	mp4ASC->samplingFrequencyIndex = tmp;
267
268	86	if (mp4ASC->samplingFrequencyIndex == 15)
269	8	{
270	8	mp4ASC->samplingFrequency = (uint32_t)faad_getbits(ld, 24
271	8	DEBUGVAR(1,13,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex"));
272	78	} else {
273	78	mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex);
274	78	}
275
276	86	bits_to_decode = (int32_t)(buffer_size*8 - (faad_get_processed_bits(ld) - startpos));
277	86	if (bits_to_decode >= 12)
278	65	{
279	65	syncExtensionType = (int16_t)faad_getbits(ld, 11
280	65	DEBUGVAR(1,14,"parse_audio_decoder_specific_info(): syncExtensionType"));
281	65	if (syncExtensionType == 0x548)
282	1	{
283	1	mp4ASC->ps_present_flag = (uint8_t)faad_get1bit(ld
284	1	DEBUGVAR(1,15,"parse_audio_decoder_specific_info(): ps_present_flag"));
285	1	}
286	65	}
287	86	}
288	88	}
289	98	}
290	162	}
291
292		/* no SBR signalled, this could mean either implicit signalling or no SBR in this file */
293		/* MPEG specification states: assume SBR on files with samplerate <= 24000 Hz */
294	341	if (mp4ASC->sbr_present_flag == (char)-1) /* cannot be -1 on systems with unsigned char */
295	191	{
296	191	if (mp4ASC->samplingFrequency <= 24000)
297	67	{
298	67	mp4ASC->samplingFrequency *= 2;
299	67	mp4ASC->forceUpSampling = 1;
300	124	} else /* > 24000*/ {
301	124	mp4ASC->downSampledSBR = 1;
302	124	}
303	191	}
304	341	#endif
305
306	341	faad_endbits(ld);
307
308	341	return result;
309	343	}
310
311		int8_t AudioSpecificConfig2(uint8_t *pBuffer,
312		uint32_t buffer_size,
313		mp4AudioSpecificConfig *mp4ASC,
314		program_config *pce,
315		uint8_t short_form)
316	372	{
317	372	uint8_t ret = 0;
318	372	bitfile ld;
319	372	faad_initbits(&ld, pBuffer, buffer_size);
320	372	if (ld.error != 0)
321	13	return -7;
322	359	ret = AudioSpecificConfigFromBitfile(&ld, mp4ASC, pce, buffer_size, short_form);
323	359	faad_endbits(&ld);
324	359	return ret;
325	372	}