/proc/self/cwd/libfaad/sbr_tf_grid.c

Source (jump to first uncovered line)
/*
** 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: sbr_tf_grid.c,v 1.20 2008/09/19 22:50:20 menno Exp $
**/

/* Time/Frequency grid */

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

#ifdef SBR_DEC

#include <stdlib.h>

#include "sbr_syntax.h"
#include "sbr_tf_grid.h"


/* static function declarations */
#if 0
static int16_t rel_bord_lead(sbr_info *sbr, uint8_t ch, uint8_t l);
static int16_t rel_bord_trail(sbr_info *sbr, uint8_t ch, uint8_t l);
#endif
static uint8_t middleBorder(sbr_info *sbr, uint8_t ch);


/* function constructs new time border vector */
/* first build into temp vector to be able to use previous vector on error */
uint8_t envelope_time_border_vector(sbr_info *sbr, uint8_t ch)
{
    uint8_t l, border, temp, trail;
    uint8_t t_E_temp[6] = {0};

    trail = sbr->abs_bord_trail[ch];
    t_E_temp[0] = sbr->rate * sbr->abs_bord_lead[ch];
    t_E_temp[sbr->L_E[ch]] = sbr->rate * trail;

    switch (sbr->bs_frame_class[ch])
    {
    case FIXFIX:
        switch (sbr->L_E[ch])
        {
        case 4:
            temp = (sbr->numTimeSlots / 4);
            t_E_temp[3] = sbr->rate * 3 * temp;
            t_E_temp[2] = sbr->rate * 2 * temp;
            t_E_temp[1] = sbr->rate * temp;
            break;
        case 2:
            t_E_temp[1] = sbr->rate * (sbr->numTimeSlots / 2);
            break;
        default:
            break;
        }
        break;

    case FIXVAR:
        if (sbr->L_E[ch] > 1)
        {
            int8_t i = sbr->L_E[ch];
            border = sbr->abs_bord_trail[ch];

            for (l = 0; l < (sbr->L_E[ch] - 1); l++)
            {
                if (border < sbr->bs_rel_bord[ch][l])
                    return 1;

                border -= sbr->bs_rel_bord[ch][l];
                t_E_temp[--i] = sbr->rate * border;
            }
        }
        break;

    case VARFIX:
        if (sbr->L_E[ch] > 1)
        {
            int8_t i = 1;
            border = sbr->abs_bord_lead[ch];

            for (l = 0; l < (sbr->L_E[ch] - 1); l++)
            {
                border += sbr->bs_rel_bord[ch][l];

                if (border > trail)
                    return 1;

                t_E_temp[i++] = sbr->rate * border;
            }
        }
        break;

    case VARVAR:
        if (sbr->bs_num_rel_0[ch])
        {
            int8_t i = 1;
            border = sbr->abs_bord_lead[ch];

            for (l = 0; l < sbr->bs_num_rel_0[ch]; l++)
            {
                border += sbr->bs_rel_bord_0[ch][l];

                if (border > trail)
                    return 1;

                t_E_temp[i++] = sbr->rate * border;
            }
        }

        if (sbr->bs_num_rel_1[ch])
        {
            int8_t i = sbr->L_E[ch];
            border = sbr->abs_bord_trail[ch];

            for (l = 0; l < sbr->bs_num_rel_1[ch]; l++)
            {
                if (border < sbr->bs_rel_bord_1[ch][l])
                    return 1;

                border -= sbr->bs_rel_bord_1[ch][l];
                t_E_temp[--i] = sbr->rate * border;
            }
        }
        break;
    }

    /* no error occured, we can safely use this t_E vector */
    for (l = 0; l < 6; l++)
    {
        sbr->t_E[ch][l] = t_E_temp[l];
    }

    return 0;
}

void noise_floor_time_border_vector(sbr_info *sbr, uint8_t ch)
{
    sbr->t_Q[ch][0] = sbr->t_E[ch][0];

    if (sbr->L_E[ch] == 1)
    {
        sbr->t_Q[ch][1] = sbr->t_E[ch][1];
        sbr->t_Q[ch][2] = 0;
    } else {
        uint8_t index = middleBorder(sbr, ch);
        sbr->t_Q[ch][1] = sbr->t_E[ch][index];
        sbr->t_Q[ch][2] = sbr->t_E[ch][sbr->L_E[ch]];
    }
}

#if 0
static int16_t rel_bord_lead(sbr_info *sbr, uint8_t ch, uint8_t l)
{
    uint8_t i;
    int16_t acc = 0;

    switch (sbr->bs_frame_class[ch])
    {
    case FIXFIX:
        return sbr->numTimeSlots/sbr->L_E[ch];
    case FIXVAR:
        return 0;
    case VARFIX:
        for (i = 0; i < l; i++)
        {
            acc += sbr->bs_rel_bord[ch][i];
        }
        return acc;
    case VARVAR:
        for (i = 0; i < l; i++)
        {
            acc += sbr->bs_rel_bord_0[ch][i];
        }
        return acc;
    }

    return 0;
}

static int16_t rel_bord_trail(sbr_info *sbr, uint8_t ch, uint8_t l)
{
    uint8_t i;
    int16_t acc = 0;

    switch (sbr->bs_frame_class[ch])
    {
    case FIXFIX:
    case VARFIX:
        return 0;
    case FIXVAR:
        for (i = 0; i < l; i++)
        {
            acc += sbr->bs_rel_bord[ch][i];
        }
        return acc;
    case VARVAR:
        for (i = 0; i < l; i++)
        {
            acc += sbr->bs_rel_bord_1[ch][i];
        }
        return acc;
    }

    return 0;
}
#endif

static uint8_t middleBorder(sbr_info *sbr, uint8_t ch)
{
    int8_t retval = 0;

    switch (sbr->bs_frame_class[ch])
    {
    case FIXFIX:
        retval = sbr->L_E[ch]/2;
        break;
    case VARFIX:
        if (sbr->bs_pointer[ch] == 0)
            retval = 1;
        else if (sbr->bs_pointer[ch] == 1)
            retval = sbr->L_E[ch] - 1;
        else
            retval = sbr->bs_pointer[ch] - 1;
        break;
    case FIXVAR:
    case VARVAR:
        if (sbr->bs_pointer[ch] > 1)
            retval = sbr->L_E[ch] + 1 - sbr->bs_pointer[ch];
        else
            retval = sbr->L_E[ch] - 1;
        break;
    }

    return (retval > 0) ? retval : 0;
}


#endif

Coverage Report

Created: 2025-07-23 06:30

Line	Count	Source (jump to first uncovered line)
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: sbr_tf_grid.c,v 1.20 2008/09/19 22:50:20 menno Exp $
29		**/
30
31		/* Time/Frequency grid */
32
33		#include "common.h"
34		#include "structs.h"
35
36		#ifdef SBR_DEC
37
38		#include <stdlib.h>
39
40		#include "sbr_syntax.h"
41		#include "sbr_tf_grid.h"
42
43
44		/* static function declarations */
45		#if 0
46		static int16_t rel_bord_lead(sbr_info *sbr, uint8_t ch, uint8_t l);
47		static int16_t rel_bord_trail(sbr_info *sbr, uint8_t ch, uint8_t l);
48		#endif
49		static uint8_t middleBorder(sbr_info *sbr, uint8_t ch);
50
51
52		/* function constructs new time border vector */
53		/* first build into temp vector to be able to use previous vector on error */
54		uint8_t envelope_time_border_vector(sbr_info *sbr, uint8_t ch)
55	105k	{
56	105k	uint8_t l, border, temp, trail;
57	105k	uint8_t t_E_temp[6] = {0};
58
59	105k	trail = sbr->abs_bord_trail[ch];
60	105k	t_E_temp[0] = sbr->rate * sbr->abs_bord_lead[ch];
61	105k	t_E_temp[sbr->L_E[ch]] = sbr->rate * trail;
62
63	105k	switch (sbr->bs_frame_class[ch])
64	105k	{
65	39.0k	case FIXFIX:
66	39.0k	switch (sbr->L_E[ch])
67	39.0k	{
68	6.66k	case 4:
69	6.66k	temp = (sbr->numTimeSlots / 4);
70	6.66k	t_E_temp[3] = sbr->rate * 3 * temp;
71	6.66k	t_E_temp[2] = sbr->rate * 2 * temp;
72	6.66k	t_E_temp[1] = sbr->rate * temp;
73	6.66k	break;
74	5.23k	case 2:
75	5.23k	t_E_temp[1] = sbr->rate * (sbr->numTimeSlots / 2);
76	5.23k	break;
77	27.1k	default:
78	27.1k	break;
79	39.0k	}
80	39.0k	break;
81
82	39.0k	case FIXVAR:
83	22.4k	if (sbr->L_E[ch] > 1)
84	9.08k	{
85	9.08k	int8_t i = sbr->L_E[ch];
86	9.08k	border = sbr->abs_bord_trail[ch];
87
88	29.1k	for (l = 0; l < (sbr->L_E[ch] - 1); l++)
89	20.9k	{
90	20.9k	if (border < sbr->bs_rel_bord[ch][l])
91	838	return 1;
92
93	20.1k	border -= sbr->bs_rel_bord[ch][l];
94	20.1k	t_E_temp[--i] = sbr->rate * border;
95	20.1k	}
96	9.08k	}
97	21.6k	break;
98
99	23.0k	case VARFIX:
100	23.0k	if (sbr->L_E[ch] > 1)
101	12.1k	{
102	12.1k	int8_t i = 1;
103	12.1k	border = sbr->abs_bord_lead[ch];
104
105	35.3k	for (l = 0; l < (sbr->L_E[ch] - 1); l++)
106	24.2k	{
107	24.2k	border += sbr->bs_rel_bord[ch][l];
108
109	24.2k	if (border > trail)
110	973	return 1;
111
112	23.2k	t_E_temp[i++] = sbr->rate * border;
113	23.2k	}
114	12.1k	}
115	22.0k	break;
116
117	22.0k	case VARVAR:
118	21.0k	if (sbr->bs_num_rel_0[ch])
119	13.9k	{
120	13.9k	int8_t i = 1;
121	13.9k	border = sbr->abs_bord_lead[ch];
122
123	46.2k	for (l = 0; l < sbr->bs_num_rel_0[ch]; l++)
124	33.2k	{
125	33.2k	border += sbr->bs_rel_bord_0[ch][l];
126
127	33.2k	if (border > trail)
128	1.01k	return 1;
129
130	32.2k	t_E_temp[i++] = sbr->rate * border;
131	32.2k	}
132	13.9k	}
133
134	19.9k	if (sbr->bs_num_rel_1[ch])
135	14.6k	{
136	14.6k	int8_t i = sbr->L_E[ch];
137	14.6k	border = sbr->abs_bord_trail[ch];
138
139	45.9k	for (l = 0; l < sbr->bs_num_rel_1[ch]; l++)
140	32.3k	{
141	32.3k	if (border < sbr->bs_rel_bord_1[ch][l])
142	1.08k	return 1;
143
144	31.2k	border -= sbr->bs_rel_bord_1[ch][l];
145	31.2k	t_E_temp[--i] = sbr->rate * border;
146	31.2k	}
147	14.6k	}
148	18.9k	break;
149	105k	}
150
151		/* no error occured, we can safely use this t_E vector */
152	711k	for (l = 0; l < 6; l++)
153	610k	{
154	610k	sbr->t_E[ch][l] = t_E_temp[l];
155	610k	}
156
157	101k	return 0;
158	105k	}
159
160		void noise_floor_time_border_vector(sbr_info *sbr, uint8_t ch)
161	101k	{
162	101k	sbr->t_Q[ch][0] = sbr->t_E[ch][0];
163
164	101k	if (sbr->L_E[ch] == 1)
165	54.5k	{
166	54.5k	sbr->t_Q[ch][1] = sbr->t_E[ch][1];
167	54.5k	sbr->t_Q[ch][2] = 0;
168	54.5k	} else {
169	47.1k	uint8_t index = middleBorder(sbr, ch);
170	47.1k	sbr->t_Q[ch][1] = sbr->t_E[ch][index];
171	47.1k	sbr->t_Q[ch][2] = sbr->t_E[ch][sbr->L_E[ch]];
172	47.1k	}
173	101k	}
174
175		#if 0
176		static int16_t rel_bord_lead(sbr_info *sbr, uint8_t ch, uint8_t l)
177		{
178		uint8_t i;
179		int16_t acc = 0;
180
181		switch (sbr->bs_frame_class[ch])
182		{
183		case FIXFIX:
184		return sbr->numTimeSlots/sbr->L_E[ch];
185		case FIXVAR:
186		return 0;
187		case VARFIX:
188		for (i = 0; i < l; i++)
189		{
190		acc += sbr->bs_rel_bord[ch][i];
191		}
192		return acc;
193		case VARVAR:
194		for (i = 0; i < l; i++)
195		{
196		acc += sbr->bs_rel_bord_0[ch][i];
197		}
198		return acc;
199		}
200
201		return 0;
202		}
203
204		static int16_t rel_bord_trail(sbr_info *sbr, uint8_t ch, uint8_t l)
205		{
206		uint8_t i;
207		int16_t acc = 0;
208
209		switch (sbr->bs_frame_class[ch])
210		{
211		case FIXFIX:
212		case VARFIX:
213		return 0;
214		case FIXVAR:
215		for (i = 0; i < l; i++)
216		{
217		acc += sbr->bs_rel_bord[ch][i];
218		}
219		return acc;
220		case VARVAR:
221		for (i = 0; i < l; i++)
222		{
223		acc += sbr->bs_rel_bord_1[ch][i];
224		}
225		return acc;
226		}
227
228		return 0;
229		}
230		#endif
231
232		static uint8_t middleBorder(sbr_info *sbr, uint8_t ch)
233	47.1k	{
234	47.1k	int8_t retval = 0;
235
236	47.1k	switch (sbr->bs_frame_class[ch])
237	47.1k	{
238	11.8k	case FIXFIX:
239	11.8k	retval = sbr->L_E[ch]/2;
240	11.8k	break;
241	11.1k	case VARFIX:
242	11.1k	if (sbr->bs_pointer[ch] == 0)
243	4.46k	retval = 1;
244	6.68k	else if (sbr->bs_pointer[ch] == 1)
245	2.40k	retval = sbr->L_E[ch] - 1;
246	4.27k	else
247	4.27k	retval = sbr->bs_pointer[ch] - 1;
248	11.1k	break;
249	8.24k	case FIXVAR:
250	24.1k	case VARVAR:
251	24.1k	if (sbr->bs_pointer[ch] > 1)
252	9.35k	retval = sbr->L_E[ch] + 1 - sbr->bs_pointer[ch];
253	14.7k	else
254	14.7k	retval = sbr->L_E[ch] - 1;
255	24.1k	break;
256	47.1k	}
257
258	47.1k	return (retval > 0) ? retval : 0;
259	47.1k	}
260
261
262		#endif