This file defines picture structures and functions in vlc. More...

Include dependency graph for vlc_picture.h:

Data Structures
struct	plane_t
	Description of a planar graphic field. More...

struct	picture_context_t

struct	picture_buffer_t

struct	vlc_video_context_operations

struct	picture_t
	Video picture. More...

struct	picture_resource_t
	Resource for a picture. More...

Macros
#define	PICTURE_PLANE_MAX (VOUT_MAX_PLANES)
	Maximum number of plane for a picture. More...

#define	Y_PIXELS p[Y_PLANE].p_pixels

#define	Y_PITCH p[Y_PLANE].i_pitch

#define	U_PIXELS p[U_PLANE].p_pixels

#define	U_PITCH p[U_PLANE].i_pitch

#define	V_PIXELS p[V_PLANE].p_pixels

#define	V_PITCH p[V_PLANE].i_pitch

#define	A_PIXELS p[A_PLANE].p_pixels

#define	A_PITCH p[A_PLANE].i_pitch

Typedefs
typedef struct plane_t	plane_t
	Description of a planar graphic field. More...

typedef struct picture_context_t	picture_context_t

typedef struct picture_buffer_t	picture_buffer_t

typedef struct vlc_decoder_device	vlc_decoder_device

typedef struct vlc_video_context	vlc_video_context

Enumerations
enum	vlc_video_context_type { VLC_VIDEO_CONTEXT_NONE, VLC_VIDEO_CONTEXT_VAAPI, VLC_VIDEO_CONTEXT_VDPAU, VLC_VIDEO_CONTEXT_DXVA2, VLC_VIDEO_CONTEXT_D3D11VA, VLC_VIDEO_CONTEXT_AWINDOW, VLC_VIDEO_CONTEXT_NVDEC, VLC_VIDEO_CONTEXT_CVPX, VLC_VIDEO_CONTEXT_MMAL }
	Decoder device type. More...

enum	{ Y_PLANE = 0, U_PLANE = 1, V_PLANE = 2, A_PLANE = 3 }

Functions
vlc_video_context *	vlc_video_context_Create (vlc_decoder_device , enum vlc_video_context_type private_type, size_t private_size, const struct vlc_video_context_operations )

void	vlc_video_context_Release (vlc_video_context *)

enum vlc_video_context_type	vlc_video_context_GetType (const vlc_video_context *)

void *	vlc_video_context_GetPrivate (vlc_video_context *, enum vlc_video_context_type)

vlc_video_context *	vlc_video_context_Hold (vlc_video_context *)

vlc_decoder_device *	vlc_video_context_HoldDevice (vlc_video_context *)
	Get the decoder device used by the device context. More...

static vlc_video_context *	picture_GetVideoContext (picture_t *pic)

picture_t *	picture_New (vlc_fourcc_t i_chroma, int i_width, int i_height, int i_sar_num, int i_sar_den)
	This function will create a new picture. More...

picture_t *	picture_NewFromFormat (const video_format_t *p_fmt)
	This function will create a new picture using the given format. More...

picture_t *	picture_NewFromResource (const video_format_t , const picture_resource_t )
	This function will create a new picture using the provided resource. More...

void	picture_Destroy (picture_t *picture)
	Destroys a picture without references. More...

static picture_t *	picture_Hold (picture_t *picture)
	Increments the picture reference count. More...

static void	picture_Release (picture_t *picture)
	Decrements the picture reference count. More...

void	picture_CopyProperties (picture_t p_dst, const picture_t p_src)
	This function will copy all picture dynamic properties. More...

void	picture_Reset (picture_t *)
	This function will reset a picture information (properties and quantizers). More...

void	picture_CopyPixels (picture_t p_dst, const picture_t p_src)
	This function will copy the picture pixels. More...

void	plane_CopyPixels (plane_t p_dst, const plane_t p_src)

void	picture_Copy (picture_t p_dst, const picture_t p_src)
	This function will copy both picture dynamic properties and pixels. More...

picture_t *	picture_Clone (picture_t *pic)
	Perform a shallow picture copy. More...

int	picture_Export (vlc_object_t p_obj, block_t pp_image, video_format_t p_fmt, picture_t *p_picture, vlc_fourcc_t i_format, int i_override_width, int i_override_height, bool b_crop)
	This function will export a picture to an encoded bitstream. More...

int	picture_Setup (picture_t , const video_format_t )
	This function will setup all fields of a picture_t without allocating any memory. More...

static void	picture_SwapUV (picture_t *picture)
	Swap UV planes of a Tri Planars picture. More...

Detailed Description

This file defines picture structures and functions in vlc.

Macro Definition Documentation

◆ A_PITCH

#define A_PITCH p[A_PLANE].i_pitch

◆ A_PIXELS

#define A_PIXELS p[A_PLANE].p_pixels

◆ PICTURE_PLANE_MAX

#define PICTURE_PLANE_MAX (VOUT_MAX_PLANES)

Maximum number of plane for a picture.

Referenced by picture_NewFromFormat().

◆ U_PITCH

#define U_PITCH p[U_PLANE].i_pitch

◆ U_PIXELS

#define U_PIXELS p[U_PLANE].p_pixels

◆ V_PITCH

#define V_PITCH p[V_PLANE].i_pitch

◆ V_PIXELS

#define V_PIXELS p[V_PLANE].p_pixels

◆ Y_PITCH

#define Y_PITCH p[Y_PLANE].i_pitch

◆ Y_PIXELS

#define Y_PIXELS p[Y_PLANE].p_pixels

Typedef Documentation

◆ picture_buffer_t

typedef struct picture_buffer_t picture_buffer_t

◆ picture_context_t

typedef struct picture_context_t picture_context_t

◆ plane_t

typedef struct plane_t plane_t

Description of a planar graphic field.

◆ vlc_decoder_device

typedef struct vlc_decoder_device vlc_decoder_device

◆ vlc_video_context

typedef struct vlc_video_context vlc_video_context

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
Y_PLANE
U_PLANE
V_PLANE
A_PLANE

◆ vlc_video_context_type

enum vlc_video_context_type

Decoder device type.

Enumerator
VLC_VIDEO_CONTEXT_NONE
VLC_VIDEO_CONTEXT_VAAPI
VLC_VIDEO_CONTEXT_VDPAU
VLC_VIDEO_CONTEXT_DXVA2	private: d3d9_video_context_t*
VLC_VIDEO_CONTEXT_D3D11VA	private: d3d11_video_context_t*
VLC_VIDEO_CONTEXT_AWINDOW	private: android_video_context_t*
VLC_VIDEO_CONTEXT_NVDEC
VLC_VIDEO_CONTEXT_CVPX
VLC_VIDEO_CONTEXT_MMAL

Function Documentation

◆ picture_Clone()

picture_t* picture_Clone ( picture_t * pic )

Perform a shallow picture copy.

This function makes a shallow copy of an existing picture. The same planes and resources will be used, and the cloned picture reference count will be incremented.

Returns: A clone picture on success, NULL on error.

References picture_t::context, picture_context_t::copy, likely, picture_DestroyClone(), and picture_InternalClone().

Referenced by picture_Release(), and vout_snapshot_Set().

◆ picture_Copy()

void picture_Copy	(	picture_t *	p_dst,
		const picture_t *	p_src
	)

This function will copy both picture dynamic properties and pixels.

You have to notice that sometime a simple picture_Hold may do what you want without the copy overhead. Provided for convenience.

Parameters

p_dst	pointer to the destination picture.
p_src	pointer to the source picture.

References picture_CopyPixels(), and picture_CopyProperties().

Referenced by picture_Release(), and ThreadDisplayRenderPicture().

◆ picture_CopyPixels()

void picture_CopyPixels	(	picture_t *	p_dst,
		const picture_t *	p_src
	)

This function will copy the picture pixels.

You can safely copy between pictures that do not have the same size, only the compatible(smaller) part will be copied.

References picture_t::context, picture_context_t::copy, picture_t::i_planes, picture_t::p, and plane_CopyPixels().

Referenced by picture_Copy(), and picture_Release().

◆ picture_CopyProperties()

void picture_CopyProperties	(	picture_t *	p_dst,
		const picture_t *	p_src
	)

This function will copy all picture dynamic properties.

References picture_t::b_force, picture_t::b_progressive, picture_t::b_still, picture_t::b_top_field_first, picture_t::date, and picture_t::i_nb_fields.

Referenced by picture_Copy(), and picture_Release().

◆ picture_Destroy()

void picture_Destroy ( picture_t * picture )

Destroys a picture without references.

This function destroys a picture with zero references left. Never call this function directly. Use picture_Release() instead.

References container_of, picture_priv_t::destroy, picture_priv_t::gc, PictureDestroyContext(), picture_priv_buffer_t::priv, and picture_t::refs.

Referenced by picture_Release().

◆ picture_Export()

int picture_Export	(	vlc_object_t *	p_obj,
		block_t **	pp_image,
		video_format_t *	p_fmt,
		picture_t *	p_picture,
		vlc_fourcc_t	i_format,
		int	i_override_width,
		int	i_override_height,
		bool	b_crop
	)

This function will export a picture to an encoded bitstream.

pp_image will contain the encoded bitstream in psz_format format.

p_fmt can be NULL otherwise it will be set with the format used for the picture before encoding.

i_override_width/height allow to override the width and/or the height of the picture to be encoded:

if strictly lower than 0, the original dimension will be used.
if equal to 0, it will be deduced from the other dimension which must be different to 0.
if strictly higher than 0, it will either override the dimension if b_crop is false, or crop the picture to the provided size if b_crop is true. If at most one of them is > 0 then the picture aspect ratio will be kept.

References picture_t::date, picture_t::format, video_format_t::i_chroma, block_t::i_dts, video_format_t::i_height, block_t::i_pts, video_format_t::i_sar_den, video_format_t::i_sar_num, video_format_t::i_visible_height, video_format_t::i_visible_width, video_format_t::i_width, video_format_t::i_x_offset, video_format_t::i_y_offset, image_HandlerCreate, image_HandlerDelete(), image_Write, VLC_EGENERIC, VLC_ENOMEM, and VLC_SUCCESS.

Referenced by picture_Release(), and vout_GetSnapshot().

◆ picture_GetVideoContext()

static vlc_video_context* picture_GetVideoContext ( picture_t * pic )

inlinestatic

References picture_t::context, picture_New(), picture_NewFromFormat(), picture_context_t::vctx, VLC_API, and VLC_USED.

Referenced by ThreadDisplayPreparePicture().

◆ picture_Hold()

static picture_t* picture_Hold ( picture_t * picture )

inlinestatic

Increments the picture reference count.

Returns: picture

References picture_t::refs.

Referenced by ConvertRGB32AndBlend(), ImageConvert(), ImageWrite(), picture_fifo_Peek(), picture_InternalClone(), SpuRenderRegion(), ThreadDisplayPreparePicture(), and ThreadDisplayRenderPicture().

◆ picture_New()

picture_t* picture_New	(	vlc_fourcc_t	i_chroma,
		int	i_width,
		int	i_height,
		int	i_sar_num,
		int	i_sar_den
	)

This function will create a new picture.

The picture created will implement a default release management compatible with picture_Hold and picture_Release. This default management will release p_sys, gc.p_sys fields if non NULL.

References picture_NewFromFormat(), video_format_Init(), and video_format_Setup().

Referenced by picture_GetVideoContext().

◆ picture_NewFromFormat()

picture_t* picture_NewFromFormat ( const video_format_t * p_fmt )

This function will create a new picture using the given format.

When possible, it is preferred to use this function over picture_New as more information about the format is kept.

Referenced by picture_GetVideoContext().

◆ picture_NewFromResource()

picture_t* picture_NewFromResource	(	const video_format_t *	,
		const picture_resource_t *
	)

This function will create a new picture using the provided resource.

If the resource is NULL then a plain picture_NewFromFormat is returned.

References plane_t::i_lines, picture_resource_t::i_lines, plane_t::i_pitch, picture_resource_t::i_pitch, picture_t::i_planes, picture_t::p, picture_resource_t::p, plane_t::p_pixels, picture_resource_t::p_pixels, picture_priv_t::picture, picture_InitPrivate(), and unlikely.

Referenced by picture_InternalClone().

◆ picture_Release()

static void picture_Release ( picture_t * picture )

inlinestatic

Decrements the picture reference count.

If the reference count reaches zero, the picture is destroyed. If it was allocated from a pool, the underlying picture buffer will be returned to the pool. Otherwise, the picture buffer will be freed.

References picture_Clone(), picture_Copy(), picture_CopyPixels(), picture_CopyProperties(), picture_Destroy(), picture_Export(), picture_Reset(), picture_Setup(), plane_CopyPixels(), picture_t::refs, VLC_API, and vlc_assert.

Referenced by ConvertRGB32AndBlend(), FilterDeletePictures(), ImageRead(), ImageWrite(), ModuleThread_PlayVideo(), ModuleThread_QueueThumbnail(), picture_DestroyClone(), picture_fifo_Flush(), picture_pool_NewFromFormat(), picture_pool_Release(), picture_pool_ReleasePicture(), picture_pool_Reserve(), spuregion_CreateFromPicture(), SpuRenderRegion(), subpicture_NewFromPicture(), subpicture_region_Delete(), subpicture_region_private_Delete(), ThreadDisplayPicture(), ThreadDisplayPreparePicture(), ThreadDisplayRenderPicture(), ThreadFilterFlush(), video_splitter_DeletePicture(), video_splitter_NewPicture(), vout_ConvertForDisplay(), vout_display_Display(), vout_FlushUnlocked(), vout_GetSnapshot(), vout_IsEmpty(), vout_snapshot_Destroy(), and VoutSaveSnapshot().

◆ picture_Reset()

void picture_Reset ( picture_t * )

This function will reset a picture information (properties and quantizers).

It is sometimes useful for reusing pictures (like from a pool).

References picture_t::b_force, picture_t::b_progressive, picture_t::b_still, picture_t::b_top_field_first, picture_t::date, picture_t::i_nb_fields, PictureDestroyContext(), and VLC_TICK_INVALID.

Referenced by ModuleThread_NewVideoBuffer(), picture_Release(), vout_GetPicture(), and VoutVideoFilterInteractiveNewPicture().

◆ picture_Setup()

int picture_Setup	(	picture_t *	,
		const video_format_t *
	)

This function will setup all fields of a picture_t without allocating any memory.

XXX The memory must already be initialized. It does not need to be released.

It will return VLC_EGENERIC if the core does not understand the requested format.

It can be useful to get the properties of planes.

Referenced by picture_Release().

◆ picture_SwapUV()

static void picture_SwapUV ( picture_t * picture )

inlinestatic

Swap UV planes of a Tri Planars picture.

It just swap the planes information without doing any copy.

References picture_t::i_planes, picture_t::p, U_PLANE, V_PLANE, and vlc_assert.

◆ plane_CopyPixels()

void plane_CopyPixels	(	plane_t *	p_dst,
		const plane_t *	p_src
	)

References plane_t::i_pitch, plane_t::i_visible_lines, plane_t::i_visible_pitch, and plane_t::p_pixels.

Referenced by picture_CopyPixels(), and picture_Release().

◆ vlc_video_context_Create()

vlc_video_context* vlc_video_context_Create	(	vlc_decoder_device *	,
		enum vlc_video_context_type	private_type,
		size_t	private_size,
		const struct vlc_video_context_operations *
	)