Helper macros and functions. More...

Files
file	defs.h
	`spa/utils/defs.h`

Data Structures
struct	spa_rectangle

struct	spa_point

struct	spa_region

struct	spa_fraction

Macros
#define	SPA_FALLTHROUGH /* FALLTHROUGH */
	SPA_FALLTHROUGH is an annotation to suppress compiler warnings about switch cases that fall through without a break or return statement. More...

#define	SPA_FLAG_MASK(field, mask, flag) (((field) & (mask)) == (flag))

#define	SPA_FLAG_IS_SET(field, flag) SPA_FLAG_MASK(field, flag, flag)

#define	SPA_FLAG_SET(field, flag) ((field) \|= (flag))

#define	SPA_FLAG_CLEAR(field, flag)

#define	SPA_FLAG_UPDATE(field, flag, val) ((val) ? SPA_FLAG_SET((field),(flag)) : SPA_FLAG_CLEAR((field),(flag)))

#define	SPA_DIRECTION_REVERSE(d) ((d) ^ 1)

#define	SPA_RECTANGLE(width, height) ((struct spa_rectangle){ (width), (height) })

#define	SPA_POINT(x, y) ((struct spa_point){ (x), (y) })

#define	SPA_REGION(x, y, width, height) ((struct spa_region){ SPA_POINT(x,y), SPA_RECTANGLE(width,height) })

#define	SPA_FRACTION(num, denom) ((struct spa_fraction){ (num), (denom) })

#define	SPA_N_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0]))

#define	SPA_FOR_EACH_ELEMENT(arr, ptr) for ((ptr) = arr; (void*)(ptr) < SPA_PTROFF(arr, sizeof(arr), void); (ptr)++)
	Array iterator macro. More...

#define	SPA_FOR_EACH_ELEMENT_VAR(arr, var) for (__typeof__((arr)[0])* (var) = arr; (void*)(var) < SPA_PTROFF(arr, sizeof(arr), void); (var)++)

#define	SPA_ABS(a)

#define	SPA_MIN(a, b)

#define	SPA_MAX(a, b)

#define	SPA_CLAMP(v, low, high)

#define	SPA_CLAMPF(v, low, high)

#define	SPA_SWAP(a, b)

#define	SPA_TYPECHECK(type, x)

#define	SPA_PTROFF(ptr_, offset_, type_) ((type_*)((uintptr_t)(ptr_) + (ptrdiff_t)(offset_)))
	Return the address (buffer + offset) as pointer of type. More...

#define	SPA_PTROFF_ALIGN(ptr_, offset_, alignment_, type_) SPA_PTR_ALIGN(SPA_PTROFF(ptr_,offset_,type_),alignment_,type_)

#define	SPA_MEMBER(b, o, t) SPA_PTROFF(b,o,t)
	Deprecated, use SPA_PTROFF and SPA_PTROFF_ALIGN instead. More...

#define	SPA_MEMBER_ALIGN(b, o, a, t) SPA_PTROFF_ALIGN(b,o,a,t)

#define	SPA_CONTAINER_OF(p, t, m) ((t*)((uintptr_t)(p) - offsetof(t,m)))

#define	SPA_PTRDIFF(p1, p2) ((intptr_t)(p1) - (intptr_t)(p2))

#define	SPA_PTR_TO_INT(p) ((int) ((intptr_t) (p)))

#define	SPA_INT_TO_PTR(u) ((void*) ((intptr_t) (u)))

#define	SPA_PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))

#define	SPA_UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))

#define	SPA_TIME_INVALID ((int64_t)INT64_MIN)

#define	SPA_IDX_INVALID ((unsigned int)-1)

#define	SPA_ID_INVALID ((uint32_t)0xffffffff)

#define	SPA_NSEC_PER_SEC (1000000000LL)

#define	SPA_NSEC_PER_MSEC (1000000ll)

#define	SPA_NSEC_PER_USEC (1000ll)

#define	SPA_USEC_PER_SEC (1000000ll)

#define	SPA_USEC_PER_MSEC (1000ll)

#define	SPA_MSEC_PER_SEC (1000ll)

#define	SPA_TIMESPEC_TO_NSEC(ts) ((ts)->tv_sec * SPA_NSEC_PER_SEC + (ts)->tv_nsec)

#define	SPA_TIMESPEC_TO_USEC(ts) ((ts)->tv_sec * SPA_USEC_PER_SEC + (ts)->tv_nsec / SPA_NSEC_PER_USEC)

#define	SPA_TIMEVAL_TO_NSEC(tv) ((tv)->tv_sec * SPA_NSEC_PER_SEC + (tv)->tv_usec * SPA_NSEC_PER_USEC)

#define	SPA_TIMEVAL_TO_USEC(tv) ((tv)->tv_sec * SPA_USEC_PER_SEC + (tv)->tv_usec)

#define	SPA_PRINTF_FUNC(fmt, arg1)

#define	SPA_FORMAT_ARG_FUNC(arg1)

#define	SPA_ALIGNED(align)

#define	SPA_DEPRECATED

#define	SPA_EXPORT

#define	SPA_SENTINEL

#define	SPA_UNUSED

#define	SPA_NORETURN

#define	SPA_WARN_UNUSED_RESULT

#define	SPA_RESTRICT

#define	SPA_ROUND_DOWN(num, value)

#define	SPA_ROUND_UP(num, value)

#define	SPA_ROUND_MASK(num, mask) ((__typeof__(num))((mask)-1))

#define	SPA_ROUND_DOWN_N(num, align) ((num) & ~SPA_ROUND_MASK(num, align))

#define	SPA_ROUND_UP_N(num, align) ((((num)-1) \| SPA_ROUND_MASK(num, align))+1)

#define	SPA_PTR_ALIGNMENT(p, align) ((intptr_t)(p) & ((align)-1))

#define	SPA_IS_ALIGNED(p, align) (SPA_PTR_ALIGNMENT(p,align) == 0)

#define	SPA_PTR_ALIGN(p, align, type) ((type*)SPA_ROUND_UP_N((intptr_t)(p), (intptr_t)(align)))

#define	SPA_LIKELY(x) (x)

#define	SPA_UNLIKELY(x) (x)

#define	SPA_STRINGIFY_1(...) #__VA_ARGS__

#define	SPA_STRINGIFY(...) SPA_STRINGIFY_1(__VA_ARGS__)

#define	spa_return_if_fail(expr)

#define	spa_return_val_if_fail(expr, val)

#define	spa_assert_se(expr)

#define	spa_nop() do {} while (false)

#define	spa_assert(expr) spa_assert_se(expr)

#define	spa_assert_not_reached()

#define	spa_memzero(x, l) (memset((x), 0, (l)))

#define	spa_zero(x) (spa_memzero(&(x), sizeof(x)))

#define	spa_memcpy(d, s, n) memcpy(d,s,n)

#define	spa_memmove(d, s, n) memmove(d,s,n)

#define	spa_aprintf(_fmt, ...)

Enumerations
enum	spa_direction { SPA_DIRECTION_INPUT = 0 , SPA_DIRECTION_OUTPUT = 1 }

Detailed Description

Helper macros and functions.

Macro Definition Documentation

◆ SPA_FALLTHROUGH

#define SPA_FALLTHROUGH /* FALLTHROUGH */

SPA_FALLTHROUGH is an annotation to suppress compiler warnings about switch cases that fall through without a break or return statement.

SPA_FALLTHROUGH is only needed on cases that have code:

switch (foo) { case 1: // These cases have no code. No fallthrough annotations are needed. case 2: case 3: foo = 4; // This case has code, so a fallthrough annotation is needed: SPA_FALLTHROUGH; default: return foo; }

◆ SPA_FLAG_MASK

#define SPA_FLAG_MASK	(	field,
		mask,
		flag
	)	(((field) & (mask)) == (flag))

◆ SPA_FLAG_IS_SET

#define SPA_FLAG_IS_SET	(	field,
		flag
	)	SPA_FLAG_MASK(field, flag, flag)

◆ SPA_FLAG_SET

#define SPA_FLAG_SET	(	field,
		flag
	)	((field) \|= (flag))

◆ SPA_FLAG_CLEAR

#define SPA_FLAG_CLEAR	(	field,
		flag
	)

◆ SPA_FLAG_UPDATE

#define SPA_FLAG_UPDATE	(	field,
		flag,
		val
	)	((val) ? SPA_FLAG_SET((field),(flag)) : SPA_FLAG_CLEAR((field),(flag)))

◆ SPA_DIRECTION_REVERSE

#define SPA_DIRECTION_REVERSE ( d ) ((d) ^ 1)

◆ SPA_RECTANGLE

#define SPA_RECTANGLE	(	width,
		height
	)	((struct spa_rectangle){ (width), (height) })

Examples: spa/examples/local-libcamera.c, spa/examples/local-v4l2.c, tutorial5.c, video-play-fixate.c, video-play-pull.c, video-play-reneg.c, video-play.c, video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_POINT

#define SPA_POINT	(	x,
		y
	)	((struct spa_point){ (x), (y) })

Examples: video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_REGION

#define SPA_REGION	(	x,
		y,
		width,
		height
	)	((struct spa_region){ SPA_POINT(x,y), SPA_RECTANGLE(width,height) })

Examples: video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_FRACTION

#define SPA_FRACTION	(	num,
		denom
	)	((struct spa_fraction){ (num), (denom) })

Examples: spa/examples/adapter-control.c, spa/examples/local-libcamera.c, spa/examples/local-v4l2.c, tutorial5.c, video-play-fixate.c, video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_N_ELEMENTS

#define SPA_N_ELEMENTS ( arr ) (sizeof(arr) / sizeof((arr)[0]))

Examples: local-v4l2.c.

◆ SPA_FOR_EACH_ELEMENT

#define SPA_FOR_EACH_ELEMENT	(	arr,
		ptr
	)	for ((ptr) = arr; (void*)(ptr) < SPA_PTROFF(arr, sizeof(arr), void); (ptr)++)

Array iterator macro.

Usage:

struct foo array[16];
struct foo *f;
SPA_FOR_EACH_ELEMENT(array, f) {
     f->bar = baz;
}

◆ SPA_FOR_EACH_ELEMENT_VAR

#define SPA_FOR_EACH_ELEMENT_VAR	(	arr,
		var
	)	for (__typeof__((arr)[0])* (var) = arr; (void*)(var) < SPA_PTROFF(arr, sizeof(arr), void); (var)++)

◆ SPA_ABS

#define SPA_ABS ( a )

◆ SPA_MIN

#define SPA_MIN	(	a,
		b
	)

Examples: audio-src.c, export-sink.c, local-v4l2.c, spa/examples/local-libcamera.c, spa/examples/local-v4l2.c, video-play-fixate.c, video-play-pull.c, video-play-reneg.c, and video-play.c.

◆ SPA_MAX

#define SPA_MAX	(	a,
		b
	)

◆ SPA_CLAMP

#define SPA_CLAMP	(	v,
		low,
		high
	)

Examples: audio-capture.c, video-dsp-play.c, video-play-pull.c, and video-play.c.

◆ SPA_CLAMPF

#define SPA_CLAMPF	(	v,
		low,
		high
	)

◆ SPA_SWAP

#define SPA_SWAP	(	a,
		b
	)

◆ SPA_TYPECHECK

#define SPA_TYPECHECK	(	type,
		x
	)

◆ SPA_PTROFF

#define SPA_PTROFF	(	ptr_,
		offset_,
		type_
	)	((type_*)((uintptr_t)(ptr_) + (ptrdiff_t)(offset_)))

Return the address (buffer + offset) as pointer of type.

Examples: export-sink.c, export-source.c, local-v4l2.c, spa/examples/local-libcamera.c, spa/examples/local-v4l2.c, video-play-pull.c, video-play.c, video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_PTROFF_ALIGN

#define SPA_PTROFF_ALIGN	(	ptr_,
		offset_,
		alignment_,
		type_
	)	SPA_PTR_ALIGN(SPA_PTROFF(ptr_,offset_,type_),alignment_,type_)

◆ SPA_MEMBER

#define SPA_MEMBER	(	b,
		o,
		t
	)	SPA_PTROFF(b,o,t)

Deprecated, use SPA_PTROFF and SPA_PTROFF_ALIGN instead.

◆ SPA_MEMBER_ALIGN

#define SPA_MEMBER_ALIGN	(	b,
		o,
		a,
		t
	)	SPA_PTROFF_ALIGN(b,o,a,t)

◆ SPA_CONTAINER_OF

#define SPA_CONTAINER_OF	(	p,
		t,
		m
	)	((t*)((uintptr_t)(p) - offsetof(t,m)))

◆ SPA_PTRDIFF

#define SPA_PTRDIFF	(	p1,
		p2
	)	((intptr_t)(p1) - (intptr_t)(p2))

◆ SPA_PTR_TO_INT

#define SPA_PTR_TO_INT ( p ) ((int) ((intptr_t) (p)))

◆ SPA_INT_TO_PTR

#define SPA_INT_TO_PTR ( u ) ((void*) ((intptr_t) (u)))

◆ SPA_PTR_TO_UINT32

#define SPA_PTR_TO_UINT32 ( p ) ((uint32_t) ((uintptr_t) (p)))

◆ SPA_UINT32_TO_PTR

#define SPA_UINT32_TO_PTR ( u ) ((void*) ((uintptr_t) (u)))

◆ SPA_TIME_INVALID

#define SPA_TIME_INVALID ((int64_t)INT64_MIN)

◆ SPA_IDX_INVALID

#define SPA_IDX_INVALID ((unsigned int)-1)

◆ SPA_ID_INVALID

#define SPA_ID_INVALID ((uint32_t)0xffffffff)

Examples: export-sink.c, export-source.c, export-spa-device.c, and local-v4l2.c.

◆ SPA_NSEC_PER_SEC

#define SPA_NSEC_PER_SEC (1000000000LL)

◆ SPA_NSEC_PER_MSEC

#define SPA_NSEC_PER_MSEC (1000000ll)

Examples: audio-dsp-filter.c, video-play-pull.c, video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_NSEC_PER_USEC

#define SPA_NSEC_PER_USEC (1000ll)

◆ SPA_USEC_PER_SEC

#define SPA_USEC_PER_SEC (1000000ll)

◆ SPA_USEC_PER_MSEC

#define SPA_USEC_PER_MSEC (1000ll)

◆ SPA_MSEC_PER_SEC

#define SPA_MSEC_PER_SEC (1000ll)

◆ SPA_TIMESPEC_TO_NSEC

#define SPA_TIMESPEC_TO_NSEC ( ts ) ((ts)->tv_sec * SPA_NSEC_PER_SEC + (ts)->tv_nsec)

Examples: video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_TIMESPEC_TO_USEC

#define SPA_TIMESPEC_TO_USEC ( ts ) ((ts)->tv_sec * SPA_USEC_PER_SEC + (ts)->tv_nsec / SPA_NSEC_PER_USEC)

◆ SPA_TIMEVAL_TO_NSEC

#define SPA_TIMEVAL_TO_NSEC ( tv ) ((tv)->tv_sec * SPA_NSEC_PER_SEC + (tv)->tv_usec * SPA_NSEC_PER_USEC)

◆ SPA_TIMEVAL_TO_USEC

#define SPA_TIMEVAL_TO_USEC ( tv ) ((tv)->tv_sec * SPA_USEC_PER_SEC + (tv)->tv_usec)

◆ SPA_PRINTF_FUNC

#define SPA_PRINTF_FUNC	(	fmt,
		arg1
	)

◆ SPA_FORMAT_ARG_FUNC

#define SPA_FORMAT_ARG_FUNC ( arg1 )

◆ SPA_ALIGNED

#define SPA_ALIGNED ( align )

◆ SPA_DEPRECATED

#define SPA_DEPRECATED

◆ SPA_EXPORT

#define SPA_EXPORT

◆ SPA_SENTINEL

#define SPA_SENTINEL

◆ SPA_UNUSED

#define SPA_UNUSED

◆ SPA_NORETURN

#define SPA_NORETURN

◆ SPA_WARN_UNUSED_RESULT

#define SPA_WARN_UNUSED_RESULT

◆ SPA_RESTRICT

#define SPA_RESTRICT

◆ SPA_ROUND_DOWN

#define SPA_ROUND_DOWN	(	num,
		value
	)

◆ SPA_ROUND_UP

#define SPA_ROUND_UP	(	num,
		value
	)

◆ SPA_ROUND_MASK

#define SPA_ROUND_MASK	(	num,
		mask
	)	((__typeof__(num))((mask)-1))

◆ SPA_ROUND_DOWN_N

#define SPA_ROUND_DOWN_N	(	num,
		align
	)	((num) & ~SPA_ROUND_MASK(num, align))

◆ SPA_ROUND_UP_N

#define SPA_ROUND_UP_N	(	num,
		align
	)	((((num)-1) \| SPA_ROUND_MASK(num, align))+1)

Examples: video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ SPA_PTR_ALIGNMENT

#define SPA_PTR_ALIGNMENT	(	p,
		align
	)	((intptr_t)(p) & ((align)-1))

◆ SPA_IS_ALIGNED

#define SPA_IS_ALIGNED	(	p,
		align
	)	(SPA_PTR_ALIGNMENT(p,align) == 0)

◆ SPA_PTR_ALIGN

#define SPA_PTR_ALIGN	(	p,
		align,
		type
	)	((type*)SPA_ROUND_UP_N((intptr_t)(p), (intptr_t)(align)))

◆ SPA_LIKELY

#define SPA_LIKELY ( x ) (x)

◆ SPA_UNLIKELY

#define SPA_UNLIKELY ( x ) (x)

◆ SPA_STRINGIFY_1

#define SPA_STRINGIFY_1 ( ... ) #__VA_ARGS__

◆ SPA_STRINGIFY

#define SPA_STRINGIFY ( ... ) SPA_STRINGIFY_1(__VA_ARGS__)

◆ spa_return_if_fail

#define spa_return_if_fail ( expr )

◆ spa_return_val_if_fail

#define spa_return_val_if_fail	(	expr,
		val
	)

◆ spa_assert_se

#define spa_assert_se ( expr )

◆ spa_nop

#define spa_nop ( ) do {} while (false)

◆ spa_assert

#define spa_assert ( expr ) spa_assert_se(expr)

◆ spa_assert_not_reached

#define spa_assert_not_reached ( )

◆ spa_memzero

#define spa_memzero	(	x,
		l
	)	(memset((x), 0, (l)))

◆ spa_zero

#define spa_zero ( x ) (spa_memzero(&(x), sizeof(x)))

Examples: spa/examples/adapter-control.c, tutorial2.c, and tutorial6.c.

◆ spa_memcpy

#define spa_memcpy	(	d,
		s,
		n
	)	memcpy(d,s,n)

◆ spa_memmove

#define spa_memmove	(	d,
		s,
		n
	)	memmove(d,s,n)

◆ spa_aprintf

#define spa_aprintf	(	_fmt,
		...
	)

Examples: spa/examples/adapter-control.c, spa/examples/example-control.c, spa/examples/local-libcamera.c, and spa/examples/local-v4l2.c.

Enumeration Type Documentation

◆ spa_direction

enum spa_direction

Enumerator
SPA_DIRECTION_INPUT
SPA_DIRECTION_OUTPUT

Files

Data Structures

Macros

Enumerations