Include dependency graph for picture_pool.c:

Data Structures
struct	picture_pool_t

Macros
#define	POOL_MAX (CHAR_BIT * sizeof (unsigned long long))

Functions
static void	picture_pool_Destroy (picture_pool_t *pool)

void	picture_pool_Release (picture_pool_t *pool)
	Releases a pool created by picture_pool_New() or picture_pool_NewFromFormat().

static void	picture_pool_ReleaseClone (picture_t *clone)

static picture_t *	picture_pool_ClonePicture (picture_pool_t *pool, unsigned offset)

picture_pool_t *	picture_pool_New (unsigned count, picture_t const tab)
	Creates a pool of preallocated pictures.

picture_pool_t *	picture_pool_NewFromFormat (const video_format_t *fmt, unsigned count)
	Allocates pictures from the heap and creates a picture pool with them.

picture_t *	picture_pool_Get (picture_pool_t *pool)
	Obtains a picture from a pool if any is immediately available.

picture_t *	picture_pool_Wait (picture_pool_t *pool)
	Obtains a picture from a pool.

Macro Definition Documentation

◆ POOL_MAX

#define POOL_MAX (CHAR_BIT * sizeof (unsigned long long))

Function Documentation

◆ picture_pool_ClonePicture()

static picture_t * picture_pool_ClonePicture	(	picture_pool_t *	pool,
		unsigned	offset
	)

static

References picture_pool_t::picture, picture_HasChainedPics(), picture_InternalClone(), picture_pool_ReleaseClone(), picture_pool_t::refs, and vlc_atomic_rc_inc().

Referenced by picture_pool_Get(), and picture_pool_Wait().

◆ picture_pool_Destroy()

static void picture_pool_Destroy ( picture_pool_t * pool )

static

References aligned_free, picture_pool_t::refs, and vlc_atomic_rc_dec().

Referenced by picture_pool_Release(), and picture_pool_ReleaseClone().

◆ picture_pool_Get()

picture_t * picture_pool_Get ( picture_pool_t * pool )

Obtains a picture from a pool if any is immediately available.

The picture must be released with picture_Release().

Returns: a picture, or NULL if all pictures in the pool are allocated

Note: This function is thread-safe.

References picture_pool_t::available, picture_pool_t::lock, picture_pool_ClonePicture(), picture_pool_t::refs, vlc_atomic_rc_get(), vlc_mutex_lock(), and vlc_mutex_unlock().

Referenced by PrerenderPicture(), SourceConverterBuffer(), and VoutVideoFilterInteractiveNewPicture().

◆ picture_pool_New()

picture_pool_t * picture_pool_New	(	unsigned	count,
		picture_t const	tab
	)

Creates a pool of preallocated pictures.

Free pictures can be allocated from the pool, and are returned to the pool when they are no longer referenced.

This avoids allocating and deallocationg pictures repeatedly, and ensures that memory consumption remains within limits.

To obtain a picture from the pool, use picture_pool_Get(). To increase and decrease the reference count, use picture_Hold() and picture_Release() respectively.

Parameters

count	number of pictures in the array
tab	array of pictures

Returns: a pointer to the new pool on success, or NULL on error (pictures are not released on error)

References aligned_alloc(), picture_pool_t::available, count, picture_pool_t::lock, picture_pool_t::picture, picture_pool_t::picture_count, POOL_MAX, picture_pool_t::refs, unlikely, vlc_atomic_rc_init(), vlc_cond_init(), vlc_mutex_init(), and picture_pool_t::wait.

Referenced by picture_pool_NewFromFormat().

◆ picture_pool_NewFromFormat()

picture_pool_t * picture_pool_NewFromFormat	(	const video_format_t *	fmt,
		unsigned	count
	)

Allocates pictures from the heap and creates a picture pool with them.

This is a convenience wrapper for picture_NewFromFormat() and picture_pool_New().

Parameters

fmt	video format of pictures to allocate from the heap
count	number of pictures to allocate

Returns: a pointer to the new pool on success, NULL on error

References count, picture_NewFromFormat(), picture_pool_New(), picture_Release(), POOL_MAX, unlikely, and vlc_assert_unreachable.

Referenced by ChangeFilters(), ModuleThread_UpdateVideoFormat(), vout_Start(), and VoutSetupConverter().

◆ picture_pool_Release()

void picture_pool_Release ( picture_pool_t * pool )

Releases a pool created by picture_pool_New() or picture_pool_NewFromFormat().

Note: If there are no pending references to the pooled pictures, and the picture_resource_t.pf_destroy callback was not NULL, it will be invoked. Otherwise the default callback will be used.

Warning: If there are pending references (a.k.a. late pictures), the pictures will remain valid until the all pending references are dropped by picture_Release().

References picture_pool_t::picture, picture_pool_t::picture_count, picture_pool_Destroy(), and picture_Release().

Referenced by ChangeFilters(), CreateVoutIfNeeded(), DeleteDecoder(), vout_ReleaseDisplay(), vout_Start(), VoutConverterRelease(), and VoutSetupConverter().