AVPicture

Functions for working with AVPicture. More...

Data Structures
struct	AVPicture
	four components are given, that's all. More...

Functions
int	avpicture_alloc (AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height)
	Allocate memory for a picture.
void	avpicture_free (AVPicture *picture)
	Free a picture previously allocated by avpicture_alloc().
int	avpicture_fill (AVPicture *picture, const uint8_t *ptr, enum AVPixelFormat pix_fmt, int width, int height)
	Fill in the AVPicture fields, always assume a linesize alignment of 1.
int	avpicture_layout (const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height, unsigned char *dest, int dest_size)
	Copy pixel data from an AVPicture into a buffer, always assume a linesize alignment of 1.
int	avpicture_get_size (enum AVPixelFormat pix_fmt, int width, int height)
	Calculate the size in bytes that a picture of the given width and height would occupy if stored in the given picture format.
void	av_picture_copy (AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height)
	Copy image src to dst.
int	av_picture_crop (AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int top_band, int left_band)
	Crop image top and left side.
int	av_picture_pad (AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, int *color)
	Pad image.

Detailed Description

Functions for working with AVPicture.

Function Documentation

int avpicture_alloc	(	AVPicture *	picture,
		enum AVPixelFormat	pix_fmt,
		int	width,
		int	height
	)

Allocate memory for a picture.

Call avpicture_free() to free it.

See Also

avpicture_fill()

Parameters

picture	the picture to be filled in
pix_fmt	the format of the picture
width	the width of the picture
height	the height of the picture

Returns

zero if successful, a negative value if not

Examples:

doc/examples/muxing.c.

Definition at line 54 of file avpicture.c.

Referenced by ff_create_schro_frame(), open_video(), and qtrle_encode_init().

void avpicture_free

(

AVPicture *

picture

)

Free a picture previously allocated by avpicture_alloc().

The data buffer used by the AVPicture is freed, but the AVPicture structure itself is not.

Parameters

picture

the AVPicture to be freed

Definition at line 67 of file avpicture.c.

Referenced by free_schro_frame(), and qtrle_encode_end().

int avpicture_fill	(	AVPicture *	picture,
		const uint8_t *	ptr,
		enum AVPixelFormat	pix_fmt,
		int	width,
		int	height
	)

Fill in the AVPicture fields, always assume a linesize alignment of 1.

See Also

av_image_fill_arrays()

Definition at line 34 of file avpicture.c.

Referenced by copy_frame(), raw_decode(), sdl_write_packet(), and xv_write_packet().

int avpicture_layout	(	const AVPicture *	src,
		enum AVPixelFormat	pix_fmt,
		int	width,
		int	height,
		unsigned char *	dest,
		int	dest_size
	)

Copy pixel data from an AVPicture into a buffer, always assume a linesize alignment of 1.

See Also

av_image_copy_to_buffer()

Definition at line 41 of file avpicture.c.

Referenced by encode_frame(), lavfi_read_packet(), libschroedinger_frame_from_data(), and raw_encode().

int avpicture_get_size	(	enum AVPixelFormat	pix_fmt,
		int	width,
		int	height
	)

Calculate the size in bytes that a picture of the given width and height would occupy if stored in the given picture format.

Always assume a linesize alignment of 1.

See Also

av_image_get_buffer_size().

Definition at line 49 of file avpicture.c.

Referenced by dc1394_read_common(), encode_frame(), frm_read_packet(), lavfi_read_packet(), libschroedinger_encode_init(), pnm_encode_frame(), pnm_parse(), raw_encode(), raw_init_decoder(), rawvideo_read_header(), rawvideo_read_packet(), targa_encode_frame(), utvideo_decode_init(), utvideo_encode_init(), v4l2_read_header(), vble_decode_init(), and yuv4_read_packet().

void av_picture_copy	(	AVPicture *	dst,
		const AVPicture *	src,
		enum AVPixelFormat	pix_fmt,
		int	width,
		int	height
	)

Copy image src to dst.

Wraps av_image_copy().

Definition at line 72 of file avpicture.c.

Referenced by copy_frame(), qtrle_encode_frame(), queue_picture(), and roq_decode_frame().

int av_picture_crop	(	AVPicture *	dst,
		const AVPicture *	src,
		enum AVPixelFormat	pix_fmt,
		int	top_band,
		int	left_band
	)

Crop image top and left side.

Definition at line 384 of file imgconvert.c.

int av_picture_pad	(	AVPicture *	dst,
		const AVPicture *	src,
		int	height,
		int	width,
		enum AVPixelFormat	pix_fmt,
		int	padtop,
		int	padbottom,
		int	padleft,
		int	padright,
		int *	color
	)

Pad image.

Definition at line 415 of file imgconvert.c.