/src/vlc/contrib/contrib-build/bpg/libavutil/intmath.h

Source
/*
 * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVUTIL_INTMATH_H
#define AVUTIL_INTMATH_H

#include <stdint.h>

#include "config.h"
#include "attributes.h"

#if ARCH_ARM
#   include "arm/intmath.h"
#endif

/**
 * @addtogroup lavu_internal
 * @{
 */

#if HAVE_FAST_CLZ
#if AV_GCC_VERSION_AT_LEAST(3,4)
#ifndef ff_log2
#   define ff_log2(x) (31 - __builtin_clz((x)|1))
#   ifndef ff_log2_16bit
#      define ff_log2_16bit av_log2
#   endif
#endif /* ff_log2 */
#elif defined( __INTEL_COMPILER )
#ifndef ff_log2
#   define ff_log2(x) (_bit_scan_reverse(x|1))
#   ifndef ff_log2_16bit
#      define ff_log2_16bit av_log2
#   endif
#endif /* ff_log2 */
#endif
#endif /* AV_GCC_VERSION_AT_LEAST(3,4) */

extern const uint8_t ff_log2_tab[256];

#ifndef ff_log2
#define ff_log2 ff_log2_c
#if !defined( _MSC_VER )
static av_always_inline av_const int ff_log2_c(unsigned int v)
{
    int n = 0;
    if (v & 0xffff0000) {
        v >>= 16;
        n += 16;
    }
    if (v & 0xff00) {
        v >>= 8;
        n += 8;
    }
    n += ff_log2_tab[v];

    return n;
}
#else
static av_always_inline av_const int ff_log2_c(unsigned int v)
{
    unsigned long n;
    _BitScanReverse(&n, v|1);
    return n;
}
#define ff_log2_16bit av_log2
#endif
#endif

#ifndef ff_log2_16bit
#define ff_log2_16bit ff_log2_16bit_c
static av_always_inline av_const int ff_log2_16bit_c(unsigned int v)
{
    int n = 0;
    if (v & 0xff00) {
        v >>= 8;
        n += 8;
    }
    n += ff_log2_tab[v];

    return n;
}
#endif

#define av_log2       ff_log2
#define av_log2_16bit ff_log2_16bit

/**
 * @}
 */

/**
 * @addtogroup lavu_math
 * @{
 */

#if HAVE_FAST_CLZ
#if AV_GCC_VERSION_AT_LEAST(3,4)
#ifndef ff_ctz
#define ff_ctz(v) __builtin_ctz(v)
#endif
#elif defined( __INTEL_COMPILER )
#ifndef ff_ctz
#define ff_ctz(v) _bit_scan_forward(v)
#endif
#endif
#endif

#ifndef ff_ctz
#define ff_ctz ff_ctz_c
#if !defined( _MSC_VER )
static av_always_inline av_const int ff_ctz_c(int v)
{
    int c;

    if (v & 0x1)
        return 0;

    c = 1;
    if (!(v & 0xffff)) {
        v >>= 16;
        c += 16;
    }
    if (!(v & 0xff)) {
        v >>= 8;
        c += 8;
    }
    if (!(v & 0xf)) {
        v >>= 4;
        c += 4;
    }
    if (!(v & 0x3)) {
        v >>= 2;
        c += 2;
    }
    c -= v & 0x1;

    return c;
}
#else
static av_always_inline av_const int ff_ctz_c( int v )
{
    unsigned long c;
    _BitScanForward(&c, v);
    return c;
}
#endif
#endif

/**
 * Trailing zero bit count.
 *
 * @param v  input value. If v is 0, the result is undefined.
 * @return   the number of trailing 0-bits
 */
int av_ctz(int v);

/**
 * @}
 */
#endif /* AVUTIL_INTMATH_H */

Line	Count	Source
1		/*
2		* Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
3		*
4		* This file is part of FFmpeg.
5		*
6		* FFmpeg is free software; you can redistribute it and/or
7		* modify it under the terms of the GNU Lesser General Public
8		* License as published by the Free Software Foundation; either
9		* version 2.1 of the License, or (at your option) any later version.
10		*
11		* FFmpeg is distributed in the hope that it will be useful,
12		* but WITHOUT ANY WARRANTY; without even the implied warranty of
13		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14		* Lesser General Public License for more details.
15		*
16		* You should have received a copy of the GNU Lesser General Public
17		* License along with FFmpeg; if not, write to the Free Software
18		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19		*/
20
21		#ifndef AVUTIL_INTMATH_H
22		#define AVUTIL_INTMATH_H
23
24		#include <stdint.h>
25
26		#include "config.h"
27		#include "attributes.h"
28
29		#if ARCH_ARM
30		# include "arm/intmath.h"
31		#endif
32
33		/**
34		* @addtogroup lavu_internal
35		* @{
36		*/
37
38		#if HAVE_FAST_CLZ
39		#if AV_GCC_VERSION_AT_LEAST(3,4)
40		#ifndef ff_log2
41		# define ff_log2(x) (31 - __builtin_clz((x)\|1))
42		# ifndef ff_log2_16bit
43		# define ff_log2_16bit av_log2
44		# endif
45		#endif /* ff_log2 */
46		#elif defined( __INTEL_COMPILER )
47		#ifndef ff_log2
48		# define ff_log2(x) (_bit_scan_reverse(x\|1))
49		# ifndef ff_log2_16bit
50		# define ff_log2_16bit av_log2
51		# endif
52		#endif /* ff_log2 */
53		#endif
54		#endif /* AV_GCC_VERSION_AT_LEAST(3,4) */
55
56		extern const uint8_t ff_log2_tab[256];
57
58		#ifndef ff_log2
59	0	#define ff_log2 ff_log2_c
60		#if !defined( _MSC_VER )
61		static av_always_inline av_const int ff_log2_c(unsigned int v)
62	0	{
63	0	int n = 0;
64	0	if (v & 0xffff0000) {
65	0	v >>= 16;
66	0	n += 16;
67	0	}
68	0	if (v & 0xff00) {
69	0	v >>= 8;
70	0	n += 8;
71	0	}
72	0	n += ff_log2_tab[v];
73
74	0	return n;
75	0	} Unexecuted instantiation: hevc_cabac.c:ff_log2_c Unexecuted instantiation: hevc_filter.c:ff_log2_c Unexecuted instantiation: hevc.c:ff_log2_c Unexecuted instantiation: hevcpred.c:ff_log2_c Unexecuted instantiation: hevc_refs.c:ff_log2_c Unexecuted instantiation: hevcdsp.c:ff_log2_c Unexecuted instantiation: hevc_mvs.c:ff_log2_c Unexecuted instantiation: hevc_ps.c:ff_log2_c Unexecuted instantiation: hevc_sei.c:ff_log2_c Unexecuted instantiation: utils.c:ff_log2_c Unexecuted instantiation: cabac.c:ff_log2_c Unexecuted instantiation: golomb.c:ff_log2_c Unexecuted instantiation: videodsp.c:ff_log2_c Unexecuted instantiation: mem.c:ff_log2_c Unexecuted instantiation: buffer.c:ff_log2_c Unexecuted instantiation: frame.c:ff_log2_c Unexecuted instantiation: pixdesc.c:ff_log2_c Unexecuted instantiation: md5.c:ff_log2_c Unexecuted instantiation: libbpg.c:ff_log2_c
76		#else
77		static av_always_inline av_const int ff_log2_c(unsigned int v)
78		{
79		unsigned long n;
80		_BitScanReverse(&n, v\|1);
81		return n;
82		}
83		#define ff_log2_16bit av_log2
84		#endif
85		#endif
86
87		#ifndef ff_log2_16bit
88		#define ff_log2_16bit ff_log2_16bit_c
89		static av_always_inline av_const int ff_log2_16bit_c(unsigned int v)
90	0	{
91	0	int n = 0;
92	0	if (v & 0xff00) {
93	0	v >>= 8;
94	0	n += 8;
95	0	}
96	0	n += ff_log2_tab[v];
97	0
98	0	return n;
99	0	} Unexecuted instantiation: hevc_cabac.c:ff_log2_16bit_c Unexecuted instantiation: hevc_filter.c:ff_log2_16bit_c Unexecuted instantiation: hevc.c:ff_log2_16bit_c Unexecuted instantiation: hevcpred.c:ff_log2_16bit_c Unexecuted instantiation: hevc_refs.c:ff_log2_16bit_c Unexecuted instantiation: hevcdsp.c:ff_log2_16bit_c Unexecuted instantiation: hevc_mvs.c:ff_log2_16bit_c Unexecuted instantiation: hevc_ps.c:ff_log2_16bit_c Unexecuted instantiation: hevc_sei.c:ff_log2_16bit_c Unexecuted instantiation: utils.c:ff_log2_16bit_c Unexecuted instantiation: cabac.c:ff_log2_16bit_c Unexecuted instantiation: golomb.c:ff_log2_16bit_c Unexecuted instantiation: videodsp.c:ff_log2_16bit_c Unexecuted instantiation: mem.c:ff_log2_16bit_c Unexecuted instantiation: buffer.c:ff_log2_16bit_c Unexecuted instantiation: frame.c:ff_log2_16bit_c Unexecuted instantiation: pixdesc.c:ff_log2_16bit_c Unexecuted instantiation: md5.c:ff_log2_16bit_c Unexecuted instantiation: libbpg.c:ff_log2_16bit_c
100		#endif
101
102	0	#define av_log2 ff_log2
103		#define av_log2_16bit ff_log2_16bit
104
105		/**
106		* @}
107		*/
108
109		/**
110		* @addtogroup lavu_math
111		* @{
112		*/
113
114		#if HAVE_FAST_CLZ
115		#if AV_GCC_VERSION_AT_LEAST(3,4)
116		#ifndef ff_ctz
117		#define ff_ctz(v) __builtin_ctz(v)
118		#endif
119		#elif defined( __INTEL_COMPILER )
120		#ifndef ff_ctz
121		#define ff_ctz(v) _bit_scan_forward(v)
122		#endif
123		#endif
124		#endif
125
126		#ifndef ff_ctz
127		#define ff_ctz ff_ctz_c
128		#if !defined( _MSC_VER )
129		static av_always_inline av_const int ff_ctz_c(int v)
130	0	{
131	0	int c;
132	0
133	0	if (v & 0x1)
134	0	return 0;
135	0
136	0	c = 1;
137	0	if (!(v & 0xffff)) {
138	0	v >>= 16;
139	0	c += 16;
140	0	}
141	0	if (!(v & 0xff)) {
142	0	v >>= 8;
143	0	c += 8;
144	0	}
145	0	if (!(v & 0xf)) {
146	0	v >>= 4;
147	0	c += 4;
148	0	}
149	0	if (!(v & 0x3)) {
150	0	v >>= 2;
151	0	c += 2;
152	0	}
153	0	c -= v & 0x1;
154	0
155	0	return c;
156	0	} Unexecuted instantiation: hevc_cabac.c:ff_ctz_c Unexecuted instantiation: hevc_filter.c:ff_ctz_c Unexecuted instantiation: hevc.c:ff_ctz_c Unexecuted instantiation: hevcpred.c:ff_ctz_c Unexecuted instantiation: hevc_refs.c:ff_ctz_c Unexecuted instantiation: hevcdsp.c:ff_ctz_c Unexecuted instantiation: hevc_mvs.c:ff_ctz_c Unexecuted instantiation: hevc_ps.c:ff_ctz_c Unexecuted instantiation: hevc_sei.c:ff_ctz_c Unexecuted instantiation: utils.c:ff_ctz_c Unexecuted instantiation: cabac.c:ff_ctz_c Unexecuted instantiation: golomb.c:ff_ctz_c Unexecuted instantiation: videodsp.c:ff_ctz_c Unexecuted instantiation: mem.c:ff_ctz_c Unexecuted instantiation: buffer.c:ff_ctz_c Unexecuted instantiation: frame.c:ff_ctz_c Unexecuted instantiation: pixdesc.c:ff_ctz_c Unexecuted instantiation: md5.c:ff_ctz_c Unexecuted instantiation: libbpg.c:ff_ctz_c
157		#else
158		static av_always_inline av_const int ff_ctz_c( int v )
159		{
160		unsigned long c;
161		_BitScanForward(&c, v);
162		return c;
163		}
164		#endif
165		#endif
166
167		/**
168		* Trailing zero bit count.
169		*
170		* @param v input value. If v is 0, the result is undefined.
171		* @return the number of trailing 0-bits
172		*/
173		int av_ctz(int v);
174
175		/**
176		* @}
177		*/
178		#endif /* AVUTIL_INTMATH_H */

Coverage Report

Created: 2026-08-13 07:43