Phonon::VideoFrame Struct Reference

#include <videoframe.h>

Public Types
enum	Format { Format_Invalid, Format_RGB32, Format_YV12, Format_I420 }

Public Attributes
unsigned int	width
	The width.
unsigned int	height
	The height.
Format	format
	The format.
unsigned int	planeCount
	The amont of picture planes.
QByteArray	plane [4]
	The picture planes.
int	pitch [4]
int	visiblePitch [4]
int	lines [4]
int	visibleLines [4]

Detailed Description

This struct presents a simple video frame within Phonon. It has all the main characteristics of a frame. It has height, width and a chroma format. The chroma format also decides on how many picture planes one frame may have. For example a YV12 frame will have 3 planes, one for Y one for U and one for V. An RGB32 frame on the other hand only has one plane (as RGB is a packed format).

Author

Harald Sitter <sitte.nosp@m.r@kd.nosp@m.e.org

Member Enumeration Documentation

enum Phonon::VideoFrame::Format

Format names are kept close to the fourcc names. For multiple pixel incarnations the pixel amount is always part of the name.

See Also

http://www.fourcc.org

http://www.fourcc.org/rgb.php

http://www.fourcc.org/yuv.php

Enumerator
Format_RGB32	< Invalid Frame
Format_YV12	< Packed RGB32
Format_I420	< 3 planes 8 bit Y plane followed by 8 bit 2x2 subsampled V and U planes. < Like YV12, but U and V are swapped

Member Data Documentation

int Phonon::VideoFrame::lines[4]

Lines/scanlines in the plane (aligned).

See Also

pitch

int Phonon::VideoFrame::pitch[4]

Pitch/stride of a plane. This pitch is aligned at the backend's desire, so you must not assume any particular alignment.

Note

The pitch is always bigger than the visible pitch, for painting you want to clip the plane accordingly (e.g. treat the visible pitch as a subpicture).

for conversion into a QImage you will have to pass the appropriate pitch as bytesPerLine or you'll get unexpected results.

int Phonon::VideoFrame::visibleLines[4]

Visible lines/scanlines in the plane.

See Also

visiblePitch

int Phonon::VideoFrame::visiblePitch[4]

The visible pitch is the actually visible pitch of a plane. It depends only on the format (e.g. for YV12 0 = width, 1 = 2 = width/2).

---

The documentation for this struct was generated from the following file:

• /home/me/src/git/p/phonon/phonon/graphicsview/videoframe.h