#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "attributes.h"
#include "macros.h"
#include "version.h"
#include "libavutil/avconfig.h"
#include "config.h"
#include "intmath.h"
#include "mem.h"
#include "internal.h"

Macros
#define	AV_NE(be, le) (le)

#define	RSHIFT(a, b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))

#define	ROUNDED_DIV(a, b) (((a)>=0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))

#define	AV_CEIL_RSHIFT(a, b)

#define	FF_CEIL_RSHIFT AV_CEIL_RSHIFT

#define	FFUDIV(a, b) (((a)>0 ?(a):(a)-(b)+1) / (b))

#define	FFUMOD(a, b) ((a)-(b)*FFUDIV(a,b))

#define	FFABS(a) ((a) >= 0 ? (a) : (-(a)))
	Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable as absolute values of their type. More...

#define	FFSIGN(a) ((a) > 0 ? 1 : -1)

#define	FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
	Negative Absolute value. More...

#define	FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))
	Unsigned Absolute value. More...

#define	FFABS64U(a) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))

#define	FFDIFFSIGN(x, y) (((x)>(y)) - ((x)<(y)))
	Comparator. More...

#define	FFMAX(a, b) ((a) > (b) ? (a) : (b))

#define	FFMAX3(a, b, c) FFMAX(FFMAX(a,b),c)

#define	FFMIN(a, b) ((a) > (b) ? (b) : (a))

#define	FFMIN3(a, b, c) FFMIN(FFMIN(a,b),c)

#define	FFSWAP(type, a, b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)

#define	FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))

#define	av_ceil_log2 av_ceil_log2_c

#define	av_clip av_clip_c

#define	av_clip64 av_clip64_c

#define	av_clip_uint8 av_clip_uint8_c

#define	av_clip_int8 av_clip_int8_c

#define	av_clip_uint16 av_clip_uint16_c

#define	av_clip_int16 av_clip_int16_c

#define	av_clipl_int32 av_clipl_int32_c

#define	av_clip_intp2 av_clip_intp2_c

#define	av_clip_uintp2 av_clip_uintp2_c

#define	av_mod_uintp2 av_mod_uintp2_c

#define	av_sat_add32 av_sat_add32_c

#define	av_sat_dadd32 av_sat_dadd32_c

#define	av_sat_sub32 av_sat_sub32_c

#define	av_sat_dsub32 av_sat_dsub32_c

#define	av_sat_add64 av_sat_add64_c

#define	av_sat_sub64 av_sat_sub64_c

#define	av_clipf av_clipf_c

#define	av_clipd av_clipd_c

#define	av_popcount av_popcount_c

#define	av_popcount64 av_popcount64_c

#define	av_parity av_parity_c

#define	MKTAG(a, b, c, d) ((a) \| ((b) << 8) \| ((c) << 16) \| ((unsigned)(d) << 24))

#define	MKBETAG(a, b, c, d) ((d) \| ((c) << 8) \| ((b) << 16) \| ((unsigned)(a) << 24))

#define	GET_UTF8(val, GET_BYTE, ERROR)
	Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form. More...

#define	GET_UTF16(val, GET_16BIT, ERROR)
	Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form. More...

#define	PUT_UTF8(val, tmp, PUT_BYTE)

#define	PUT_UTF16(val, tmp, PUT_16BIT)

Functions
static av_always_inline av_const int	av_clip_c (int a, int amin, int amax)
	Clip a signed integer value into the amin-amax range. More...

static av_always_inline av_const int64_t	av_clip64_c (int64_t a, int64_t amin, int64_t amax)
	Clip a signed 64bit integer value into the amin-amax range. More...

static av_always_inline av_const uint8_t	av_clip_uint8_c (int a)
	Clip a signed integer value into the 0-255 range. More...

static av_always_inline av_const int8_t	av_clip_int8_c (int a)
	Clip a signed integer value into the -128,127 range. More...

static av_always_inline av_const uint16_t	av_clip_uint16_c (int a)
	Clip a signed integer value into the 0-65535 range. More...

static av_always_inline av_const int16_t	av_clip_int16_c (int a)
	Clip a signed integer value into the -32768,32767 range. More...

static av_always_inline av_const int32_t	av_clipl_int32_c (int64_t a)
	Clip a signed 64-bit integer value into the -2147483648,2147483647 range. More...

static av_always_inline av_const int	av_clip_intp2_c (int a, int p)
	Clip a signed integer into the -(2^p),(2^p-1) range. More...

static av_always_inline av_const unsigned	av_clip_uintp2_c (int a, int p)
	Clip a signed integer to an unsigned power of two range. More...

static av_always_inline av_const unsigned	av_mod_uintp2_c (unsigned a, unsigned p)
	Clear high bits from an unsigned integer starting with specific bit position. More...

static av_always_inline int	av_sat_add32_c (int a, int b)
	Add two signed 32-bit values with saturation. More...

static av_always_inline int	av_sat_dadd32_c (int a, int b)
	Add a doubled value to another value with saturation at both stages. More...

static av_always_inline int	av_sat_sub32_c (int a, int b)
	Subtract two signed 32-bit values with saturation. More...

static av_always_inline int	av_sat_dsub32_c (int a, int b)
	Subtract a doubled value from another value with saturation at both stages. More...

static av_always_inline int64_t	av_sat_add64_c (int64_t a, int64_t b)
	Add two signed 64-bit values with saturation. More...

static av_always_inline int64_t	av_sat_sub64_c (int64_t a, int64_t b)
	Subtract two signed 64-bit values with saturation. More...

static av_always_inline av_const float	av_clipf_c (float a, float amin, float amax)
	Clip a float value into the amin-amax range. More...

static av_always_inline av_const double	av_clipd_c (double a, double amin, double amax)
	Clip a double value into the amin-amax range. More...

static av_always_inline av_const int	av_ceil_log2_c (int x)
	Compute ceil(log2(x)). More...

static av_always_inline av_const int	av_popcount_c (uint32_t x)
	Count number of bits set to one in x. More...

static av_always_inline av_const int	av_popcount64_c (uint64_t x)
	Count number of bits set to one in x. More...

static av_always_inline av_const int	av_parity_c (uint32_t v)

Detailed Description

common internal and external API header

Definition in file common.h.

Macro Definition Documentation

◆ AV_NE

#define AV_NE	(	be,
		le
	)	(le)

Examples: decode_audio.c, demuxing_decoding.c, and resampling_audio.c.

Definition at line 50 of file common.h.

◆ RSHIFT

#define RSHIFT	(	a,
		b
	)	((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))

Definition at line 54 of file common.h.

◆ ROUNDED_DIV

#define ROUNDED_DIV	(	a,
		b
	)	(((a)>=0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))

Definition at line 56 of file common.h.

◆ AV_CEIL_RSHIFT

#define AV_CEIL_RSHIFT	(	a,
		b
	)

Value:

(!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \

: ((a) + (1<<(b)) - 1) >> (b))

Definition at line 58 of file common.h.

◆ FF_CEIL_RSHIFT

#define FF_CEIL_RSHIFT AV_CEIL_RSHIFT

Definition at line 61 of file common.h.

◆ FFUDIV

#define FFUDIV	(	a,
		b
	)	(((a)>0 ?(a):(a)-(b)+1) / (b))

Definition at line 63 of file common.h.

◆ FFUMOD

#define FFUMOD	(	a,
		b
	)	((a)-(b)*FFUDIV(a,b))

Definition at line 64 of file common.h.

◆ FFABS

#define FFABS ( a ) ((a) >= 0 ? (a) : (-(a)))

Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable as absolute values of their type.

This is the same as with *abs()

See also: FFNABS()

Definition at line 72 of file common.h.

◆ FFSIGN

#define FFSIGN ( a ) ((a) > 0 ? 1 : -1)

Definition at line 73 of file common.h.

◆ FFNABS

#define FFNABS ( a ) ((a) <= 0 ? (a) : (-(a)))

Negative Absolute value.

this works for all integers of all types. As with many macros, this evaluates its argument twice, it thus must not have a sideeffect, that is FFNABS(x++) has undefined behavior.

Definition at line 81 of file common.h.

◆ FFABSU

#define FFABSU ( a ) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))

Unsigned Absolute value.

This takes the absolute value of a signed int and returns it as a unsigned. This also works with INT_MIN which would otherwise not be representable As with many macros, this evaluates its argument twice.

Definition at line 89 of file common.h.

◆ FFABS64U

#define FFABS64U ( a ) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))

Definition at line 90 of file common.h.

◆ FFDIFFSIGN

#define FFDIFFSIGN	(	x,
		y
	)	(((x)>(y)) - ((x)<(y)))

Comparator.

For two numerical expressions x and y, gives 1 if x > y, -1 if x < y, and 0 if x == y. This is useful for instance in a qsort comparator callback. Furthermore, compilers are able to optimize this to branchless code, and there is no risk of overflow with signed types. As with many macros, this evaluates its argument multiple times, it thus must not have a side-effect.

Definition at line 101 of file common.h.

◆ FFMAX

#define FFMAX	(	a,
		b
	)	((a) > (b) ? (a) : (b))

Definition at line 103 of file common.h.

◆ FFMAX3

#define FFMAX3	(	a,
		b,
		c
	)	FFMAX(FFMAX(a,b),c)

Definition at line 104 of file common.h.

◆ FFMIN

#define FFMIN	(	a,
		b
	)	((a) > (b) ? (b) : (a))

Examples: avio_reading.c, and transcode_aac.c.

Definition at line 105 of file common.h.

◆ FFMIN3

#define FFMIN3	(	a,
		b,
		c
	)	FFMIN(FFMIN(a,b),c)

Definition at line 106 of file common.h.

◆ FFSWAP

#define FFSWAP	(	type,
		a,
		b
	)	do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)

Definition at line 108 of file common.h.

◆ FF_ARRAY_ELEMS

#define FF_ARRAY_ELEMS ( a ) (sizeof(a) / sizeof((a)[0]))

Definition at line 109 of file common.h.

◆ av_ceil_log2

#define av_ceil_log2 av_ceil_log2_c

Definition at line 119 of file common.h.

◆ av_clip

#define av_clip av_clip_c

Definition at line 122 of file common.h.

◆ av_clip64

#define av_clip64 av_clip64_c

Definition at line 125 of file common.h.

◆ av_clip_uint8

#define av_clip_uint8 av_clip_uint8_c

Definition at line 128 of file common.h.

◆ av_clip_int8

#define av_clip_int8 av_clip_int8_c

Definition at line 131 of file common.h.

◆ av_clip_uint16

#define av_clip_uint16 av_clip_uint16_c

Definition at line 134 of file common.h.

◆ av_clip_int16

#define av_clip_int16 av_clip_int16_c

Definition at line 137 of file common.h.

◆ av_clipl_int32

#define av_clipl_int32 av_clipl_int32_c

Definition at line 140 of file common.h.

◆ av_clip_intp2

#define av_clip_intp2 av_clip_intp2_c

Definition at line 143 of file common.h.

◆ av_clip_uintp2

#define av_clip_uintp2 av_clip_uintp2_c

Definition at line 146 of file common.h.

◆ av_mod_uintp2

#define av_mod_uintp2 av_mod_uintp2_c

Definition at line 149 of file common.h.

◆ av_sat_add32

#define av_sat_add32 av_sat_add32_c

Definition at line 152 of file common.h.

◆ av_sat_dadd32

#define av_sat_dadd32 av_sat_dadd32_c

Definition at line 155 of file common.h.

◆ av_sat_sub32

#define av_sat_sub32 av_sat_sub32_c

Definition at line 158 of file common.h.

◆ av_sat_dsub32

#define av_sat_dsub32 av_sat_dsub32_c

Definition at line 161 of file common.h.

◆ av_sat_add64

#define av_sat_add64 av_sat_add64_c

Definition at line 164 of file common.h.

◆ av_sat_sub64

#define av_sat_sub64 av_sat_sub64_c

Definition at line 167 of file common.h.

◆ av_clipf

#define av_clipf av_clipf_c

Definition at line 170 of file common.h.

◆ av_clipd

#define av_clipd av_clipd_c

Definition at line 173 of file common.h.

◆ av_popcount

#define av_popcount av_popcount_c

Definition at line 176 of file common.h.

◆ av_popcount64

#define av_popcount64 av_popcount64_c

Definition at line 179 of file common.h.

◆ av_parity

#define av_parity av_parity_c

Definition at line 182 of file common.h.

◆ MKTAG

#define MKTAG	(	a,
		b,
		c,
		d
	)	((a) \| ((b) << 8) \| ((c) << 16) \| ((unsigned)(d) << 24))

Definition at line 478 of file common.h.

◆ MKBETAG

#define MKBETAG	(	a,
		b,
		c,
		d
	)	((d) \| ((c) << 8) \| ((b) << 16) \| ((unsigned)(a) << 24))

Definition at line 479 of file common.h.

◆ GET_UTF8

#define GET_UTF8	(	val,
		GET_BYTE,
		ERROR
	)

Value:

    val= (GET_BYTE);\
    {\
        uint32_t top = (val & 128) >> 1;\
        if ((val & 0xc0) == 0x80 || val >= 0xFE)\
            {ERROR}\
        while (val & top) {\
            unsigned int tmp = (GET_BYTE) - 128;\
            if(tmp>>6)\
                {ERROR}\
            val= (val<<6) + tmp;\
            top <<= 5;\
        }\
        val &= (top << 1) - 1;\
    }

Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.

Parameters

val	Output value, must be an lvalue of type uint32_t.
GET_BYTE	Expression reading one byte from the input. Evaluated up to 7 times (4 for the currently assigned Unicode range). With a memory buffer input, this could be ptr++, or if you want to make sure that ptr stops at the end of a NULL terminated string then ptr ? ptr++ : 0
ERROR	Expression to be evaluated on invalid input, typically a goto statement.

Warning: ERROR should not contain a loop control statement which could interact with the internal while loop, and should force an exit from the macro code (e.g. through a goto or a return) in order to prevent undefined results.

Definition at line 499 of file common.h.

◆ GET_UTF16

#define GET_UTF16	(	val,
		GET_16BIT,
		ERROR
	)

Value:

    val = (GET_16BIT);\
    {\
        unsigned int hi = val - 0xD800;\
        if (hi < 0x800) {\
            val = (GET_16BIT) - 0xDC00;\
            if (val > 0x3FFU || hi > 0x3FFU)\
                {ERROR}\
            val += (hi<<10) + 0x10000;\
        }\
    }\

Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.

Parameters

val	Output value, must be an lvalue of type uint32_t.
GET_16BIT	Expression returning two bytes of UTF-16 data converted to native byte order. Evaluated one or two times.
ERROR	Expression to be evaluated on invalid input, typically a goto statement.

Definition at line 524 of file common.h.

◆ PUT_UTF8

#define PUT_UTF8	(	val,
		tmp,
		PUT_BYTE
	)

Value:

    {\
        int bytes, shift;\
        uint32_t in = val;\
        if (in < 0x80) {\
            tmp = in;\
            PUT_BYTE\
        } else {\
            bytes = (av_log2(in) + 4) / 5;\
            shift = (bytes - 1) * 6;\
            tmp = (256 - (256 >> bytes)) | (in >> shift);\
            PUT_BYTE\
            while (shift >= 6) {\
                shift -= 6;\
                tmp = 0x80 | ((in >> shift) & 0x3f);\
                PUT_BYTE\
            }\
        }\
    }

Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).

Parameters

val	is an input-only argument and should be of type uint32_t. It holds a UCS-4 encoded Unicode character that is to be converted to UTF-8. If val is given as a function it is executed only once.
tmp	is a temporary variable and should be of type uint8_t. It represents an intermediate value during conversion that is to be output by PUT_BYTE.
PUT_BYTE	writes the converted UTF-8 bytes to any proper destination. It could be a function or a statement, and uses tmp as the input byte. For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be executed up to 4 times for values in the valid UTF-8 range and up to 7 times in the general case, depending on the length of the converted Unicode character.

Definition at line 552 of file common.h.

◆ PUT_UTF16

#define PUT_UTF16	(	val,
		tmp,
		PUT_16BIT
	)

Value:

    {\
        uint32_t in = val;\
        if (in < 0x10000) {\
            tmp = in;\
            PUT_16BIT\
        } else {\
            tmp = 0xD800 | ((in - 0x10000) >> 10);\
            PUT_16BIT\
            tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
            PUT_16BIT\
        }\
    }\

Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).

Parameters

val	is an input-only argument and should be of type uint32_t. It holds a UCS-4 encoded Unicode character that is to be converted to UTF-16. If val is given as a function it is executed only once.
tmp	is a temporary variable and should be of type uint16_t. It represents an intermediate value during conversion that is to be output by PUT_16BIT.
PUT_16BIT	writes the converted UTF-16 data to any proper destination in desired endianness. It could be a function or a statement, and uses tmp as the input byte. For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be executed 1 or 2 times depending on input character.

Definition at line 586 of file common.h.

Function Documentation

◆ av_clip_c()

static av_always_inline av_const int av_clip_c	(	int	a,
		int	amin,
		int	amax
	)

static

Clip a signed integer value into the amin-amax range.

Parameters

a	value to clip
amin	minimum value of the clip range
amax	maximum value of the clip range

Returns: clipped value

Definition at line 200 of file common.h.

◆ av_clip64_c()

static av_always_inline av_const int64_t av_clip64_c	(	int64_t	a,
		int64_t	amin,
		int64_t	amax
	)

static

Clip a signed 64bit integer value into the amin-amax range.

Parameters

a	value to clip
amin	minimum value of the clip range
amax	maximum value of the clip range

Returns: clipped value

Definition at line 217 of file common.h.

◆ av_clip_uint8_c()

static av_always_inline av_const uint8_t av_clip_uint8_c ( int a )

static

Clip a signed integer value into the 0-255 range.

Parameters

a	value to clip

Returns: clipped value

Definition at line 232 of file common.h.

◆ av_clip_int8_c()

static av_always_inline av_const int8_t av_clip_int8_c ( int a )

static

Clip a signed integer value into the -128,127 range.

Parameters

a	value to clip

Returns: clipped value

Definition at line 243 of file common.h.

◆ av_clip_uint16_c()

static av_always_inline av_const uint16_t av_clip_uint16_c ( int a )

static

Clip a signed integer value into the 0-65535 range.

Parameters

a	value to clip

Returns: clipped value

Definition at line 254 of file common.h.

Referenced by dng_process_color16().

◆ av_clip_int16_c()

static av_always_inline av_const int16_t av_clip_int16_c ( int a )

static

Clip a signed integer value into the -32768,32767 range.

Parameters

a	value to clip

Returns: clipped value

Definition at line 265 of file common.h.

◆ av_clipl_int32_c()

static av_always_inline av_const int32_t av_clipl_int32_c ( int64_t a )

static

Clip a signed 64-bit integer value into the -2147483648,2147483647 range.

Parameters

a	value to clip

Returns: clipped value

Definition at line 276 of file common.h.

◆ av_clip_intp2_c()

static av_always_inline av_const int av_clip_intp2_c	(	int	a,
		int	p
	)

static

Clip a signed integer into the -(2^p),(2^p-1) range.

Parameters

a	value to clip
p	bit position to clip at

Returns: clipped value

Definition at line 288 of file common.h.

◆ av_clip_uintp2_c()

static av_always_inline av_const unsigned av_clip_uintp2_c	(	int	a,
		int	p
	)

static

Clip a signed integer to an unsigned power of two range.

Parameters

a	value to clip
p	bit position to clip at

Returns: clipped value

Definition at line 302 of file common.h.

Referenced by amplify_frame(), cas_slice16(), color_balance16(), color_balance16_p(), colorcontrast_slice16(), colorcontrast_slice16p(), colorcorrect_slice16(), do_output16(), export_row16(), filter(), lerp16(), monochrome_slice16(), normalize(), parse_band_ext(), postprocess_chroma(), temperature_slice16(), temperature_slice16p(), vibrance_slice16(), vibrance_slice16p(), and write_words().

◆ av_mod_uintp2_c()

static av_always_inline av_const unsigned av_mod_uintp2_c	(	unsigned	a,
		unsigned	p
	)

static

Clear high bits from an unsigned integer starting with specific bit position.

Parameters

a	value to clip
p	bit position to clip at

Returns: clipped value

Definition at line 314 of file common.h.

◆ av_sat_add32_c()

static av_always_inline int av_sat_add32_c	(	int	a,
		int	b
	)

static

Add two signed 32-bit values with saturation.

Parameters

a	one value
b	another value

Returns: sum with signed saturation

Definition at line 326 of file common.h.

◆ av_sat_dadd32_c()

static av_always_inline int av_sat_dadd32_c	(	int	a,
		int	b
	)

static

Add a doubled value to another value with saturation at both stages.

Parameters

a	first value
b	value doubled and added to a

Returns: sum sat(a + sat(2*b)) with signed saturation

Definition at line 338 of file common.h.

◆ av_sat_sub32_c()

static av_always_inline int av_sat_sub32_c	(	int	a,
		int	b
	)

static

Subtract two signed 32-bit values with saturation.

Parameters

a	one value
b	another value

Returns: difference with signed saturation

Definition at line 350 of file common.h.

◆ av_sat_dsub32_c()

static av_always_inline int av_sat_dsub32_c	(	int	a,
		int	b
	)

static

Subtract a doubled value from another value with saturation at both stages.

Parameters

a	first value
b	value doubled and subtracted from a

Returns: difference sat(a - sat(2*b)) with signed saturation

Definition at line 362 of file common.h.

◆ av_sat_add64_c()

static av_always_inline int64_t av_sat_add64_c	(	int64_t	a,
		int64_t	b
	)

static

Add two signed 64-bit values with saturation.

Parameters

a	one value
b	another value

Returns: sum with signed saturation

Definition at line 374 of file common.h.

◆ av_sat_sub64_c()

static av_always_inline int64_t av_sat_sub64_c	(	int64_t	a,
		int64_t	b
	)

static

Subtract two signed 64-bit values with saturation.

Parameters

a	one value
b	another value

Returns: difference with signed saturation

Definition at line 393 of file common.h.

◆ av_clipf_c()

static av_always_inline av_const float av_clipf_c	(	float	a,
		float	amin,
		float	amax
	)

static

Clip a float value into the amin-amax range.

Parameters

a	value to clip
amin	minimum value of the clip range
amax	maximum value of the clip range

Returns: clipped value

Definition at line 413 of file common.h.

◆ av_clipd_c()

static av_always_inline av_const double av_clipd_c	(	double	a,
		double	amin,
		double	amax
	)

static

Clip a double value into the amin-amax range.

Parameters

a	value to clip
amin	minimum value of the clip range
amax	maximum value of the clip range

Returns: clipped value

Definition at line 430 of file common.h.

◆ av_ceil_log2_c()

static av_always_inline av_const int av_ceil_log2_c ( int x )

static

Compute ceil(log2(x)).

Parameters

x	value used to compute ceil(log2(x))

Returns: computed ceiling of log2(x)

Definition at line 444 of file common.h.

Referenced by config_input(), and hevc_parse_slice_header().

◆ av_popcount_c()

static av_always_inline av_const int av_popcount_c ( uint32_t x )

static

Count number of bits set to one in x.

Parameters

x	value to count bits of

Returns: the number of bits set to one in x

Definition at line 454 of file common.h.

◆ av_popcount64_c()

static av_always_inline av_const int av_popcount64_c ( uint64_t x )

static

Count number of bits set to one in x.

Parameters

x	value to count bits of

Returns: the number of bits set to one in x

Definition at line 468 of file common.h.

◆ av_parity_c()

static av_always_inline av_const int av_parity_c ( uint32_t v )

static

Definition at line 473 of file common.h.

Macros

Functions

Detailed Description

Macro Definition Documentation

◆ AV_NE

◆ RSHIFT

◆ ROUNDED_DIV

◆ AV_CEIL_RSHIFT

◆ FF_CEIL_RSHIFT

◆ FFUDIV

◆ FFUMOD

◆ FFABS

◆ FFSIGN

◆ FFNABS

◆ FFABSU

◆ FFABS64U

◆ FFDIFFSIGN

◆ FFMAX

◆ FFMAX3

◆ FFMIN

◆ FFMIN3

◆ FFSWAP

◆ FF_ARRAY_ELEMS

◆ av_ceil_log2

◆ av_clip

◆ av_clip64

◆ av_clip_uint8

◆ av_clip_int8

◆ av_clip_uint16

◆ av_clip_int16

◆ av_clipl_int32

◆ av_clip_intp2

◆ av_clip_uintp2

◆ av_mod_uintp2

◆ av_sat_add32

◆ av_sat_dadd32

◆ av_sat_sub32

◆ av_sat_dsub32

◆ av_sat_add64

◆ av_sat_sub64

◆ av_clipf

◆ av_clipd

◆ av_popcount

◆ av_popcount64

◆ av_parity

◆ MKTAG

◆ MKBETAG

◆ GET_UTF8

◆ GET_UTF16

◆ PUT_UTF8

◆ PUT_UTF16

Function Documentation

◆ av_clip_c()

◆ av_clip64_c()

◆ av_clip_uint8_c()

◆ av_clip_int8_c()

◆ av_clip_uint16_c()

◆ av_clip_int16_c()

◆ av_clipl_int32_c()

◆ av_clip_intp2_c()

◆ av_clip_uintp2_c()

◆ av_mod_uintp2_c()

◆ av_sat_add32_c()

◆ av_sat_dadd32_c()

◆ av_sat_sub32_c()

◆ av_sat_dsub32_c()

◆ av_sat_add64_c()

◆ av_sat_sub64_c()

◆ av_clipf_c()

◆ av_clipd_c()

◆ av_ceil_log2_c()

◆ av_popcount_c()

◆ av_popcount64_c()

◆ av_parity_c()